WO2007090349A1

WO2007090349A1 - A method for multi-queue packet data transmission and a system thereof

Info

Publication number: WO2007090349A1
Application number: PCT/CN2007/000420
Authority: WO
Inventors: Sheng Liu
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2006-02-08
Filing date: 2007-02-07
Publication date: 2007-08-16

Abstract

The present invention relates to the mobile communication technology. A method for multi-queue packet data transmission and a system thereof can be used to improve the availability of the air interface resource. In the invention, the concatenated PDU which belongs to the same UE in a plurality of priority queues of the MAC-hs entity of network side is sent to the UE, and the UE obtains each PDU from the concatenated PDU by the corresponding dis-concatenation. Before the concatenation, the VF of each PDU is removed, and the VF of the first bit of the concatenated PDU is set to 1, then the UE performs dis-concatenation when the received VF is 1. The type field is added to the concatenated PDU for identifying the different types of the PDU. The remnant bits after the last PDU in the concatenated PDU include an optional filling field, and the corresponding filling pointer field is created when the number of the remnant bits is greater than or equal to the presetting bit number L0; and the filling pointer field is not created when the number of the remnant bits is less than the presetting bit number L0.

Description

Multi-queue packet data transmission method and system thereof

This application is required to be submitted to the China Patent Office on February 8, 2006, March 7, 2006, and May 25, 2006, and the application number is 200610004098.3, 200610067229.2 200610082347.0, and the invention name is "Multi-queue multiplexing of MAC layer in HSDPA". The method, the "multi-queue packet data transmission method and its system," the "multi-queue packet data transmission method and its system" priority of the Chinese patent application, the entire contents of which are incorporated herein by reference.

Technical field

The present invention relates to mobile communication technologies, and in particular, to a multi-queue packet data transmission method and system thereof.

Background technique

The 3rd Generation Partnership Project (3GPP) is an important organization in the field of mobile communications. It promotes the standardization of the third generation of mobile communications (The Third Generation, referred to as "3G,"). The bearer of the uplink and downlink services in the protocol version is based on the dedicated channel.

With the development of mobile communication technology, 3G technology is also evolving. High Speed Downlink Packet Access (HSDPA) and High Speed Uplink Packet Access (HSUPA) are important advancements in 3G technology. The scheduling and retransmission of data packets in HSDPA and HSUPA are controlled by a base station node (Node B).

Among them, HSDPA was introduced to 3GPP in 2002 as a downlink high-speed packet access technology.

In version 5 (Release 5, referred to as "R5"), it uses a shorter 2ms Transmission Time Interval (" ΤΤΓ") for fast adaptive control. Adaptive coding and use at the physical layer Adaptive Modulation and Coding ("AMC") and Hybrid Auto Repeat reQuest ('HARQ").

In addition, the role of the wireless interface protocol is to establish, reconfigure, and release radio bearers. The HSDPA-related protocol in the wireless air interface (Uu interface) is shown in Figure 1. From the control plane, there are three main layers: the physical layer (physical layer) is the first layer, and the medium access control protocol layer (Medium Access Control, The abbreviation "MAC" and the Radio Link Control ("RCC";) layer are the second layer, and the corresponding Radio Resource Control (Radio Resource Control, The layer referred to as "RC" is the third layer.

The physical layer provides services to the MAC layer through the transport channel. The type and characteristics of the transmitted data determine the characteristics of the transport channel. The MAC layer provides services to the RLC layer through logical channels. The characteristics of the logical channel are also determined by the type of data transmitted; The traffic of the RLC layer is used to transmit signaling.

In the MAC layer, the MAC layer logical structure consists of three logical entities:

Medium Access Control (Broadcast Control) (Broadcast Channel, referred to as "BCH", for each user equipment (User Equipment, referred to as "UE") And each cell (located in Node B) of the UMTS Terrestrial Radio Access Network ("UTRAN") has a MAC-b entity.

Media Access Control - Common/Shared entity (Medium Access Control-common/share, referred to as "MAC-c/sh"), used to process the paging channel (Paging Channel, referred to as "PCH"), forward access channel (Forward) The Access Channel, abbreviated as "FACH"), the random access channel (Random Access Channel, "RACH"), and the Downlink Shared Channel ("DSCH") are common channels and shared channels. There is one MAC-c/sh entity in each UE using the shared channel; one MAC-c/sh entity in each cell of the UTRAN, located in the Controlling Radio Network Controller (CRNC) ).

A dedicated medium access control entity (Medium Access Control - dedicated, referred to as "MAC-d";), for a dedicated channel (Dedicated Channel, referred to as "DCH") connected to the processing mode ₀ are assigned to the UE in each of the UE There is a MAC-d entity.

In addition, since HSDPA refers to the DSCH mode, a new transmission channel HS-DSCH is added. To support the physical layer process of HSDPA, the MAC layer of the UE and UTRAN (located in Node B) adds an HSDPA-specific functional entity, ie, media access control. - Medium Access Control (high speed, referred to as "MAC-hs") to handle the required actions. The structures of the MAC-hs entities in the UTRA and the UE are as shown in FIG. 2 and FIG. 3, respectively.

After the MAC-hs entity on the Node B receives the MAC-d Protocol Data Unit ("PDU"), that is, the Service Data Unit (SDU) of the MAC-hs, Priority processing and packet scheduling according to the priority of the SDU (Scheduling/Priority Handling) to manage resources on the HS-DSCH between HARQ entities. The HARQ entity decides to retransmit the PDU or send a new PDU according to the status report of the HARQ entity backhaul. It also determines the Queue ID and the transmission sequence number of the MAC-hs PDU (the transmission sequence number is called "TSN": ). The Transport Format Resource Combination ("TFRC") selection unit is responsible for selecting the number of parallel channels to be used for transmission on the High Speed Downlink Shared Channel (HS-DSCH). Transmission format and resources such as spreading code, transport block size, and modulation scheme.

When the MAC-hs entity on the UE side receives the MAC-hs PDU from the HS-DSCH channel, it is first sent to the HARQ entity, and the HARQ entity on the UE side is the receiver of the HARQ entity on the UTRAN side, which is responsible for completing the generation of the ACK (correct response). NACK (error response) response, HARQ soft combining, etc. After HARQ processing, the reordering queue unit allocates the MAC-hs PDU according to the Queue ID field of the MAC-hs PDU header to the corresponding reordering queue, and in the reordering queue, according to the header of each MAC-hs PDU The TSN field reorders the MAC-hs PDUs to restore the original packet sequence. Finally, the MAC-hs PDUs that have been restored to the original order are sent to the split unit, and the split unit is based on the MAC-hs PDU header. The SID (SDU Length Indicator), N (SDU Number), and F (Flag, Identity) fields separate each MAC-d PDU from the payload portion of the MAC-hs PDU and send it to the MAC-d entity.

The transmission format of the MAC-hs PDU is as shown in FIG. 4, wherein the PDU is divided into a header and a payload portion. The header includes fields such as Version Flag (VF), Queue ID, TSN, SID, N, and F.

Specifically, the length of the VF field is 1 bit, which is used to identify the version of the PDU. The value of the VF field of the current protocol is 0. The length of the Queue ID field is 3 bits, which is used to identify the PDU of the same priority queue. The length of the TSN field is 6 bits, used to identify the serial number of the PDU, so that the receiving end's ΌΈ can restore the original PDU order according to the serial number; the SID field has a length of 3 bits, and is used to indicate the length of the SDUs of the same size sequenced together ( The length of the SDU and the corresponding SID are configured by the upper layer. The length of the N field is 7 bits, which indicates the number of SDUs that are cascaded together in the same size.

The payload portion is multiplexed by multiple SDUs, and the SDUs of the same length are cascaded together, and the size and the number of SDUs that are sequentially cascaded are identified by the corresponding SID and N fields of the PDU header. The F field of length 1 bit indicates whether the subsequent SDU is another size. The SID and N field identifiers are specified. If the F field is "0", it indicates that the SID and N field identifiers corresponding to the SDU of another size are subsequent. If the field is "Γ, the end of the PDU header is indicated. That is, the subsequent part is the payload portion of the PDU.

In practical applications, the above solution has the following problems: The utilization of air interface resources is low.

The main reason for this situation is that when a UE has multiple priority queues of different priorities at the same time, and the amount of data in these queues is smaller than the amount of data that the current TTI can actually accommodate on the HS-DSCH, the MAC The -hs entity can only transmit data of one of the priority queues, so that the actual bandwidth of the current TTI on the HS-DSCH is not fully utilized, and the air interface resource utilization is low. Summary of the invention

The technical problem to be solved by the embodiments of the present invention is to provide a multi-queue packet data transmission method and a system thereof, so as to solve the problem of low utilization of the air interface resources in the prior art.

To solve the above technical problem, an embodiment of the present invention provides a multi-queue packet data transmission method, including the steps of:

The network side cascades the protocol data units in the at least two priority queues belonging to the same user equipment, and sends the cascaded protocol data units to the user equipment;

The user equipment decomposes the concatenated protocol data units to obtain protocol data units of the respective priority queues.

In addition, the embodiment of the present invention further provides a multi-queue packet data transmission system, including a MAC-hs entity on the network side and a MAC-hs entity in the user equipment, and

a cascading unit, located in the MAC-hs entity on the network side, for combining protocol data units of at least two priority queues of the same user equipment to form a cascading protocol data unit; or for combining the combined protocol The cascading protocol data unit is formed by cascading the header and the payload portion of the data unit; the cascading unit is located in the MAC-hs entity of the user equipment, and is configured to decompose the cascading protocol data unit, The protocol data units of the respective priority queues are obtained.

In the embodiment of the present invention, the network-side MAC-hs entity concatenates the PDUs belonging to the same UE in the multiple priority queues to the UE, and the UE decomposes the PDUs from the concatenated PDUs by using the corresponding de-cascade. It can be seen from the foregoing technical solutions that the embodiments of the present invention have the obvious beneficial effects that the PDUs of multiple priority queues of the same UE are simultaneously transmitted in a cascade manner, so that the utilization of air interface resources is effectively improved, for example, Number of PDUs of different priorities of the same UE The amount is relatively small.

DRAWINGS

1 is an overall structural diagram of a wireless interface protocol in the prior art;

2 is a structural diagram of a MAC-hs entity in a Node B in the prior art;

3 is a structural diagram of a MAC-hs entity in a UE in the prior art;

4 is a format diagram of a PDU in a MAC-hs entity in the prior art;

5 is a flowchart of a multi-queue packet data transmission method according to a first embodiment of the present invention; FIG. 6 is a schematic diagram of a format of a concatenated PDU in a MAC-hs entity according to the first embodiment of the present invention;

7 is a schematic diagram showing the format of a concatenated PDU in a MAC-hs entity according to the first embodiment of the present invention;

8 is a flowchart of a multi-queue packet data transmission method according to a second embodiment of the present invention; FIG. 9 is a schematic diagram of a format of a concatenated PDU in a MAC-hs entity according to a second embodiment of the present invention;

10 is a schematic diagram showing the format of a concatenated PDU in a MAC-hs entity according to a second embodiment of the present invention;

11 is a flowchart of a multi-queue packet data transmission method according to a third embodiment of the present invention; FIG. 12 is a schematic diagram showing a format of a concatenated PDU in a MAC-hs entity according to a third embodiment of the present invention;

13 is a schematic diagram showing the format of a concatenated PDU in a MAC-hs entity according to a third embodiment of the present invention;

14 is a flowchart of a multi-queue packet data transmission method according to a fourth embodiment of the present invention; FIG. 15 is a schematic diagram showing a format of a concatenated PDU in a MAC-hs entity according to a fourth embodiment of the present invention;

16 is a schematic diagram showing the format of a concatenated PDU in a MAC-hs entity according to a fourth embodiment of the present invention;

17 is a structural diagram of a multi-queue packet data transmission system according to a fourth embodiment of the present invention; FIG. 18 is a structural diagram of a MAC-hs entity in a Node B according to a fourth embodiment of the present invention; and FIG. 19 is a fourth embodiment of the present invention. MAC-hs entity structure diagram in the UE. detailed description

The embodiment of the present invention forms a new cascade by cascading protocol data unit PDUs of at least two (may be multiple) priority queues of the same UE by a medium access control-share (MAC-hs) entity on the network side. PDU. The format of each PDU in the cascading PDU may be the same as the prior art, or may be a new format. The difference is that the version identifier VF field of each PDU is removed, and VF is set at the front end of the cascaded FDU. 1 to distinguish non-cascaded PDUs, such as prior art PDUs and concatenated PDUs; or set VF = 1 at the front end of the cascaded PDUs, and together with the type field to indicate cascaded PDUs; optional The padding field is included in the remaining bits after the last PDU in the concatenated PDU, with an optional padding pointer field indicating the starting position of the padding field, and a padding pointer flag indicating whether there is a padding pointer field ( Pointer Flag, referred to as "PF," for short; or a cascading flag CF field added after each PDU. When the CF field does not exist, it indicates that there is no padding data after the PDU. When the CF field exists, it is used to indicate The subsequent data is the padding data of another PDU; or the headers of the respective PDUs are cascaded together, and the payload portions of the respective PDUs are cascaded together, and the header of each PDU is added after the header. CF bits field to indicate what the subsequent data payload portion of the head or another PDU of the PDU.

When the MAC-hs entity of the UE receives the concatenated PDU, it determines whether the received PDU is a concatenated PDU according to VF=1; or determines whether the received PDU is concatenated according to VF=1 and the type field. PDU; if it is a cascading PDU, then reads the type field, processes the padding field according to the PDU type, PF, and padding pointer fields, and obtains each PDU by corresponding cascading decomposition; or according to the type of PDU, CF Fields are used for corresponding cascading decomposition to obtain individual PDUs; or the headers of the respective PDUs are decomposed according to the CF field, and the payload portions of the respective PDUs are determined according to the headers of the decomposed PDUs, and finally The type of PDU is further decomposed.

The invention will be further described in detail below with reference to the drawings and embodiments.

Referring to FIG. 5, a flow chart of a multi-queue packet data transmission method according to a first embodiment of the present invention is shown in FIG. 5.

In step 501, the MAC-hs entity of the MAC layer in the base station Node B will be the same UE. In step 502, the Node B sets the first bit of the concatenated PDU, that is, the VF field to 1. Ie VF-1, and set the PF field and the optional padding field and padding pointer field. The VF field of the cascading PDU is set to 1, so that the UE can effectively distinguish whether the received data is concatenated according to the VF field; after the PF field is set in the VF field, the cascaded PDU structure is as shown in FIG. 6. Or; set the PF field at the end of the cascaded PDU, as shown in Figure 7; or, set the PF field to the specified location (ie its location in the cascaded PDU is fixed and the Node B and UE have Know a bit of a). The cascaded PDUs are then sent to the UE. The PDUs of the multiple priority queues of the same UE are simultaneously transmitted in a cascading manner, so that the utilization of the air interface resources is effectively improved, for example, the data volume of the PDUs of different priorities of the same UE is relatively small.

When cascading, the remaining bits after the last PDU in the concatenated PDU include an optional padding field. Since in the existing MAC-hs technology, the shortest length of the PDU header after removing the VF field is 20 bits, in order to distinguish the PDU and the padding field, if the remaining number of bits is greater than or equal to 20, a corresponding padding pointer field is generated. And set the value of the corresponding PF field, for example, 1; if the number of remaining bits is less than 20, the padding pointer field is not generated, and the value of the corresponding PF field is also set, for example, 0. When the number of remaining bits after the last PDU in the cascading PDU is less than 20, the padding pointer field is not generated, and the length of the cascading PDU can be further shortened, thereby saving air interface resources. The padding pointer field is set at a specified position of the cascading PDU, and the length may be 8 bits or 12 bits.

In step 503, after receiving the data sent by the Node B, the UE reads the VF field of the first bit. If the value of the VF field is 0, it indicates that the received data is a single PDU, and proceeds to step 510; If the value of the VF field is 1, it indicates that the received data is a concatenated PDU, and the process proceeds to step 504.

In step 504, the UE determines, according to the PF field, whether there is a padding pointer field. Similarly, as described in the foregoing example, if the value of the PF field is 1, there is a padding pointer field, and the process proceeds to step 507; if the value of the PF field is 0, There is no fill pointer field, and the process proceeds to step 505.

In step 505, the MAC-hs entity of the UE does not have a padding pointer field according to the indication of the PF field, and may determine that the remaining number of bits after the last PDU in the concatenated PDU is less than 20. The UE decomposes the concatenated PDUs, and counts the remaining number of bits after the decomposed PDUs. Specifically, since the PDU formats in the concatenated PDUs are consistent with the prior art, the cascading can be decomposed by using the prior art. The header and payload portion of the first PDU in the PDU, and then determining the starting position of the second PDU, the second PDU can be equally decomposed, and the subsequent PDU decomposition methods are sequentially Analogy. This is well known to those skilled in the art and will not be described herein. It can be seen that the present embodiment further decomposes the de-cascaded PDUs by using the prior art, fully utilizing existing system resources, and reducing system cost.

In step 506, the UE determines whether the number of remaining bits is less than 20, and if so, the remaining bits of the statistics do not include the PDU, indicating that the decomposition cascade is completed, and proceeds to step 510; 505.

In step 507, the MAC-hs entity of the UE reads the padding pointer field according to the indication of the PF field, thereby obtaining the starting position of the padding field.

In step 508, the MAC-hs entity of the UE performs cascading decomposition on the cascading PDUs, and decomposes one PDU included therein each time. In addition, the method of decomposing may also adopt the prior art, which is to those skilled in the art. It is said to be a well-known technology and will not be described here.

In step 509, while the UE performs cascading decomposition, it is determined whether the starting position of the padding field is reached, and if so, the decomposition cascading is also completed, and the process proceeds to step 510; otherwise, the process proceeds to step 508.

In step 510, the UE further decomposes the PDU according to the prior art, and the process ends.

Please refer to FIG. 8, which is a flow chart of a multi-queue packet data transmission method according to a second embodiment of the present invention, as shown in FIG. 8.

In step 801, the MAC-hs entity of the MAC layer in the Node B detaches the PDUs by removing the VF field from each PDU (without padding field) of two or more priority queues of the same UE.

In step 802, Node B sets the cascaded PDUs to VF = 1. Due to the development of HSDPA technology, new MAC-hs PDU types will be added in the future protocol. The VF fields of these new types of MAC-hs PDUs are also "1". Therefore, when the protocol introduces a new type of MAC-hs PDU. After that, you cannot use VF = 1 to indicate that the PDU is a concatenated PDU. To this end, a type field is set after the VF field of the concatenated PDU, or other specified location (ie, its location in the concatenated PDU is fixed and known to the Node B and the UE), to indicate the current protocol version. Other types of non-cascading PDUs are also used to indicate concatenated PDUs consisting of a certain type of PDU, the type field length being a predetermined bit, for example 3 bits. The details are shown in Table 1. Table 1 gives an example of a type field in which the value of the type field "χχθ" is used to indicate the non-cascading of the new type. PDU, the value of the type field is "χχ" is used to indicate the concatenation of the corresponding new type of PDU.

Table 1: Example definition of type field

In addition, the concatenated PDU also includes a PF field, and there may also be a padding field and a padding pointer field. The first bit after the type field in the concatenated PDU is a PF field, as shown in FIG. 9; or, the last bit of the concatenated PDU is a PF field, as shown in FIG. 10; or, the PF field is Set to one bit of the specified location (ie, its location in the concatenated PDU is fixed and known to the Node B and UE).

Specifically, the number of remaining bits after the last PDU in the concatenated PDU is greater than or equal to the preset number of bits L. The PF field indicates that there is a padding pointer field, for example, the PF field is set to 1; when the remaining number of bits is less than the preset number of bits L _Q , the indication of the PF field does not have a padding pointer field, for example, the PF field is set to 0. When the number of remaining bits is less than the preset number of bits Lo, the padding pointer field is not generated, and the length of the concatenated PDU can be further shortened, thereby saving air interface resources. The preset number of bits Lo is the shortest length of the PDU header of the corresponding type (excluding the length of the VF field). For example, the MAC-hs PDU version of the existing protocol does not include the VF field. The shortest length of the PDU header is 20 bits. The padding pointer field is set at a specified position of the cascading PDU, for example, after the padding field, the length may be 8 bit or 12 bit specifications.

Then, the cascaded PDU is sent to the UE.

In step 803, after receiving the data sent by the Node B, the UE reads the VF field of the first bit. If the value of the VF field is 0, it indicates that the received data is a single PDU of the existing protocol version. In step 810, if the value of the VF field is 1, the UE further determines, according to the concatenation indication field, whether the received data is a concatenated PDU. If the type field indicates that the received data is a concatenated PDU, go to step 804. .

In step 804, the UE determines whether there is a padding pointer field according to the PF field, and if yes, proceeds to step 807; otherwise, proceeds to step 805.

In step 805, the UE learns the preset number of bits L _Q corresponding to the PDU of the type according to the indication of the type field, and the padding pointer field is not indicated by the indication of the PF field, that is, after the last PDU in the concatenated PDU The remaining number of bits is less than the preset number of bits L _Q . The UE decomposes the concatenated PDUs, and counts the remaining number of bits after the decomposed PDUs. Specifically, the UE can learn the format of each PDU in the concatenated PDU according to the indication of the type field, so that the cascading can be decomposed. The header and payload portion of the first PDU in the PDU, and then determine the starting position of the second PDU, the second PDU can be decomposed in the same manner, and the subsequent PDU decomposition method is analogous.

In step 806, the UE determines whether the counted remaining number of bits is less than the preset number of bits L. If yes, the remaining bits must not include the PDU, indicating that the decomposition cascade is complete, and proceeds to step 810; otherwise, proceeds to step 805.

In step 807, the MAC-hs entity of the UE reads the padding pointer field according to the indication of the PF field, thereby obtaining the starting position of the padding field.

In step 808, the MAC-hs entity of the UE performs cascading decomposition on the cascading PDU according to the indication of the type field, and decomposes one PDU included therein each time. In addition, the method of decomposition is similar to the prior art. No longer.

In step 809, while the UE performs cascading decomposition, it is determined whether the starting position of the padding field is reached, and if so, the decomposition cascading is also completed, and the process proceeds to step 810; otherwise, the step is transferred to

808.

In step 810, the UE further decomposes the PDU according to the PDU type indicated by the type field, and the process ends. Please refer to FIG. 11 , which is a flowchart of a multi-queue packet data transmission method according to a third embodiment of the present invention, as shown in FIG. 11 .

In step 1101, the MAC-hs entity of the MAC layer in the Node B removes the VF field from each PDU of the two or more priority queues of the same UE (without the padding field), and then cascading the PDUs, and each of the two PDUs The CF field is set, wherein these CF fields indicate that the subsequent data is a PDU, for example, GF = 0.

In step 1102, the Node B sets the first bit of the concatenated PDU, that is, the VF field to 1, that is, VF=1. The UE can effectively distinguish whether the received data is a concatenated PDU according to the value of the VF field. Or, after the VF field, or other specified location (ie, its location in the concatenated PDU is fixed and known to the Node B and the UE), a type field is used to indicate a MAC-hs PDU other than the current protocol version. Type, the type field is used to indicate other types of non-cascading PDUs other than the current protocol version, and is also used to indicate a concatenated PDU consisting of a certain type of PDU, the type field length is predetermined The bit is, for example, 3 bits, as shown in Table 1. When there is a padding field, the CF field is also set after the last PDU, which indicates that the subsequent data is a padding field, for example, CF = 1. When there is no padding field, there is no CF field after the last PDU. The format of the cascading PDU is as shown in FIG. 12 or FIG. 13, and the cascaded PDU is sent to the UE.

In step 1103, after receiving the data sent by the Node B, the UE reads the VF field of the first bit and the value of the type field that may exist. If the value of the VF field is 0, the received data is a single. The PDU is transferred to step 1106; if the value of the VF field is 1, it indicates that the received data is a concatenated PDU, and the process proceeds to step 1104; or, if the value of the VF field is 1, the value of the type field is further read. If the value of the type field indicates that the received data is a concatenated PDU, then go to step 1104, otherwise go to step 1106.

In step 1104, the UE performs de-cascading according to the PDU type to obtain a PDU. In step 1105, after the UE reads the PDU, it determines whether there is any subsequent data. If yes, it reads the CF field of the next bit. If the CF field indicates that the subsequent data is a PDU, that is, CF=0, then the process proceeds to step 1104. If there is no data, or the CF field indicates that the subsequent data is a padding field, ie CF = 1, then go to step 1106. The PDU and padding fields are distinguished by the CF field, so that the de-cascading system of the UE is simple in construction and easy to implement. In step 1106, the UE further decomposes the PDU according to the PDU type indicated by the type field, and the process ends.

In the foregoing embodiments, the positions of the fields in the cascading PDUs are all specified positions, and those skilled in the art can easily understand that the order of the positions does not affect the de-cascading of the UE, and the UE only needs to be cascaded according to the set. The PDU structure is decomposed accordingly.

Referring to FIG. 14, which is a flow chart of a multi-queue packet data transmission method according to a fourth embodiment of the present invention, as shown in FIG.

In step 1401, after the MAC-hs entity of the MAC layer in the Node B removes the VF field from each PDU (without padding field) of two or more priority queues of the same UE, the header and payload of each PDU are removed. The segments are respectively cascaded, and then the headers of the cascaded PDUs and the concatenated payload portions of the respective PDUs are grouped into cascading PDUs, wherein a CF field is set between every two PDU headers, and the last PDU is set. The header is connected to the payload portion of the first PDU via CF. The CF field is used to indicate whether the subsequent data is the payload portion of the PDU. For example, CF = 0 indicates that the subsequent data is the payload portion of the PDU, and CF = 1 indicates that the subsequent data is the header of a PDU.

In step 1402, Node B sets the first bit of the cascading PDU header, the VF field, to

1 , that is, VF = 1, the UE can distinguish whether the received data is a concatenated PDU according to the value of the VF field; or, after the VF field, or other specified location (ie, its location in the cascading PDU header) a setting type field that is fixed and known to the Node B and the UE, and is used to indicate a type of a MAC-hs PDU other than the current protocol version, the type field being used to indicate other types of non-in addition to the current protocol version. The concatenated PDU is also used to indicate a concatenated PDU consisting of a certain type of PDU, the type field length being a predetermined bit, for example, 3 bits, as shown in the example given in Table 1; When the field is filled, the CF field is also set after the last PDU header, and the CF indicates that the subsequent data is a padding field, and the padding field is after the payload portion of the PDU. For example CF = 1. When there is no padding field, there is no CF field after the last PDU header. The format of the cascaded PDU is as shown in FIG. 15 or FIG. 16, and the cascaded PDU is sent to the UE.

The subsequent steps 3403 to 1406 of this embodiment are the same as the steps 1103 to 1106 of the third embodiment. For details, refer to the above, and details are not described herein again.

Referring to FIG. 17, FIG. 17 is a schematic structural diagram of a multi-queue packet data transmission system according to a fifth embodiment of the present invention. As shown in FIG. 17, a MAC-hs entity is included in a network side and a UE, respectively. The MAC-hs entity on the network side includes: a priority processing and a packet scheduling function, a HARQ entity, and a TFRC selecting unit. A PDU cascading unit, a priority queue allocation unit, and a priority queue are included in the priority processing and packet scheduling function. Specifically, as shown in FIG. 18, the method includes: a cascading unit, a priority queue allocation unit, a hybrid adaptive retransmission requesting entity, and a transport format resource combination selecting unit, and a split combining unit (not shown), where The cascading unit, the priority queue allocating unit, and the split combining unit are located in the priority processing and packet scheduling function.

The cascading unit is configured to combine protocol data units of at least two priority queues into a cascading protocol data unit; the priority queue allocation unit is connected to the cascading unit and is used to belong to the same user equipment. The service data unit is allocated to at least two priority queues for caching according to the priority of the service data unit. Or transmitting the same to the cascading unit; the hybrid adaptive retransmission requesting entity is connected to the cascading unit, and configured to transmit the cascading protocol data unit to the transport format resource combination selecting unit; The format resource combination selection unit is connected to the hybrid adaptive retransmission request entity, and is configured to select a transmission format and a resource corresponding to the concatenated protocol data unit, and transmit the same to the user equipment. The split combination unit is located in the MAC-hs entity on the network side, and is connected to the cascading unit, and is configured to receive a header of a protocol data unit of at least two priority queues of the same user equipment. The payload portion is split and the header and payload portions of the split protocol data unit are combined separately.

The MAC-hs entity of the UE includes: a HARQ entity, a de-cascading unit, a re-arranging queue allocation unit, a reordering queue, and a splitting unit. As shown in FIG. 19, the method includes: a hybrid adaptive retransmission request entity, a reordering queue allocation unit, a splitting unit, and a de-cascading unit;

The de-cascading unit is configured to decompose the concatenated protocol data unit to obtain protocol data units of the respective priority queues; and the hybrid adaptive retransmission request entity is configured to receive the level from the network side a protocol data unit, and sent to the de-cascading unit; the re-arranging queue allocation unit is connected to the de-cascading unit, and configured to obtain the protocol data sheet obtained according to the decomposed cascade The header recovers the original order of the protocol data unit, and divides the protocol data sheet after the recovery into at least two reordering queues; the split unit is connected to the rearrangement queue allocating unit, and is used according to the The header of the protocol data unit that restores the original ordering splits the payload portion thereof to obtain the service data unit of each priority queue. The specific implementation process is:

On the network side, the SDUs belonging to the same UE are allocated by the priority queue allocation unit according to the priority of the SDU to the corresponding priority queue for buffering, wherein the data packets in each priority queue have the same priority for the same UE. SDUs of the same level, and there may be multiple SDUs of the same priority but different sizes in each priority queue; the network side performs transmission scheduling on the buffered SDUs, and multiplexes the SDUs in the same priority queue that need to be sent to form PDUs; If required, the cascading unit combines the PDUs of the at least two priority queues into a cascading PDU, and sends the cascaded PDU to the HARQ entity, otherwise the PDU of the priority queue that is scheduled to be transmitted is still sent to the HARQ. The entity; the cascading PDU selects a transmission format and a resource by using a TFRC selection unit, for example, selecting a parallel number of code channels and a corresponding spreading code, a transmission block size, and a modulation scheme, and the like, and transmitting the same to the UE.

Alternatively, if necessary, the split combination unit first splits the header and payload portions of the protocol data unit of the at least two priority queues that received the same user equipment, and splits the header of the protocol data unit after splitting. And the payload are combined separately. And then sending the combined header and payload parts to the cascading single TL, the cascading unit forming the received header and payload parts to form a concatenated PDU; and transmitting the concatenated PDU to the HARQ Entity, otherwise, the PDU of a priority queue that is scheduled to be transmitted is sent to the HARQ entity; the subsequent steps are the same as the implementation process of directly combining the PDUs to form a cascading PDU, and details are not described herein again.

At the UE side, the Queued PDU from the network side is received by the HARQ entity, and the AC/NACK response message is generated, the HARQ soft combining is performed, and the cascaded PDU is sent to the de-cascading unit; Determining whether the PDU is a concatenated PDU according to a VF field (and a type field) of the PDU, and if it is a concatenated PDU, performing de-cascading processing, due to the Queue ID field of each PDU header in the cascading mode and The TSN fields are independent of each other. Therefore, according to the header of each PDU, each PDU is allocated to the corresponding reordering queue by the reordering queue allocating unit. If it is not a concatenated PDU, the PDU is directly sent to the reordering queue allocation. The unit is then assigned to the corresponding reordering queue by the reordering queue allocation unit; the reordering queue is responsible for restoring the original ordering of the PDU, and finally the splitting unit splits the payload portion of the PDU to obtain each SDU.

According to the above-disclosed technology, the embodiment of the present invention is different from the prior art in that: the network-side MAC-hs entity cascades the PDUs belonging to the same UE in the multiple priority queues to the PDUs. The UE, the UE decomposes each PDU from the concatenated PDU by a corresponding de-cascading. Before the cascading, the VF of each PDU is removed, and the VF is set to 1 in the first bit of the concatenated PDU, and the UE performs de-casing when the received VF is 1. A type field is added to the cascading PDU to distinguish different types of PDUs.

The remaining bits after the last PDU in the cascading PDU include an optional padding field. When the remaining number of bits is greater than or equal to the preset number of bits L _Q , a corresponding padding pointer field is generated; when the remaining number of bits is less than the preset When the number of bits is L _Q , the padding pointer field is not generated.

The end of the cascading PDU is an optional padding field, and a cascading flag (CF) field of one bit is set after each PDU. When CF does not exist, it indicates that the PDU is not filled with data; when CF exists , used to indicate whether the subsequent data is another PDU or padding data.

Or concatenating the headers of the respective PDUs, and cascading the payload portions of the PDUs together, adding a CF field of one bit after the header of each PDU, to indicate that the subsequent data is another PDU. The header is also the payload portion of the PDU.

It can be seen that the technology in the embodiment of the present invention has a more obvious beneficial effect compared with the prior art, that is, the PDUs of multiple priority queues of the same UE are simultaneously sent in a cascade manner, so that the air interface resources are The utilization rate is effectively improved, for example, the amount of data in the PDUs of different priorities of the same UE is relatively small.

By removing the VF of each PDU before cascading and setting VF to 1 in the first bit of the cascaded PDU, the length of the cascaded PDU is shortened, the efficiency of data transmission is improved, and air interface resources are saved. Moreover, since the VF of the cascading PDU is 1, it is compatible with the VF of the existing PDU, which also enables the UE to effectively distinguish whether the received data is cascaded according to the VF.

Since the type field is added to the cascading PDU to distinguish different types of PDUs, the type of the PDU can be extended to meet the needs of business development.

When the number of remaining bits after the last PDU in the cascading PDU is less than the preset number of bits Lo, the padding pointer field is not generated, and the length of the concatenated PDU can be further shortened, and the air interface resource is further saved.

When the manner in which the PDUs are directly cascaded is adopted, the PDU and the padding field are distinguished by the CF, so that the system of the de-cascading of the UE is simple in structure and easy to implement.

When the cascading of the header and the payload portion of each PDU are separately categorized by CF To distinguish the header of each PDU, and the tiered PDU header and the concatenated payload portion, so that the cascading PDU is consistent with the non-cascading PDU, that is, the data of the header part is followed by the net. The partial data is simple in structure and easy to implement.

Although the invention has been illustrated and described with reference to the preferred embodiments of the present invention, it will be understood The spirit and scope of the invention.

Claims

Rights request

A multi-queue packet data transmission method, comprising:

The network side concatenates the protocol data units in the at least two priority queues belonging to the same user equipment, and sends the cascaded protocol data unit to the user equipment;

The multi-queue packet data transmission method according to claim 1, wherein the cascading manner comprises: directly cascading protocol data units in the priority queue, or arranging the protocol data unit The header and payload portions are respectively cascaded to form a cascaded protocol data unit.

The multi-queue packet data transmission method according to claim 2, wherein the method further comprises the steps of:

The media access control-high-speed MAC-hs entity of the network side medium access control layer removes the version identifier of each unit header from the protocol data unit, performs cascading, and is first in the cascading protocol data unit. The bit setting version is identified as 1.

The multi-queue packet data transmission method according to claim 3, wherein, when the MAC-hs entity of the user equipment receives the concatenated protocol data unit with the version identifier of 1, It performs de-cascading.

The multi-queue packet data transmission method according to claim 3, wherein the concatenated protocol data unit further comprises: indicating a type of the non-cascading protocol data unit or protocol data of the same type The type field of the concatenated protocol data unit that the unit constitutes.

The multi-queue packet data transmission method according to claim 5, wherein a type field is set after a version identification field in the concatenated protocol data unit or at a specified position, and the length of the type field is The number of bits set in advance.

7. The multi-queue packet data transmission method according to claim 2, wherein, in the cascading, the last protocol data unit of the concatenated protocol data unit or the remaining bits after the payload portion thereof Includes padding fields.

The multi-queue packet data transmission method according to claim 7, wherein the remaining bits after the last protocol data unit in the concatenated protocol data unit further include: indicating a start of the padding field The fill pointer field of the location and/or indicate whether the fill exists Fill pointer identifier for the fill pointer field.

The multi-queue packet data transmission method according to claim 8, wherein when the number of remaining bits is greater than or equal to a preset number of bits L _Q , the padding pointer identifier indicates that the padding pointer field exists;

When the remaining number of bits is less than the preset number of bits Lo, the padding pointer identifier indicates that the padding pointer field does not exist.

10. The multi-queue packet data transmission method according to claim 9, wherein the padding pointer field is set at a specified position of the concatenated protocol data unit, and the length thereof is

8 bits or 12 bits;

One bit after the version identification in the concatenated protocol data unit, after the type field, last or at the specified position is set to the fill pointer identification.

The multi-queue packet data transmission method according to claim 9, wherein the method further comprises the steps of:

When the padding pointer field exists, the MAC-hs entity of the user equipment reads the starting position of the padding pointer field according to the indication of the padding pointer identifier; and performs the concatenated protocol data unit Decompose until it reaches the beginning of the filled pointer field.

When the padding pointer field does not exist, the MAC-hs entity of the user equipment decomposes the concatenated protocol data unit according to the indication of the padding pointer identifier, and simultaneously counts the decomposed protocol data unit. The remaining number of bits; continues to be decomposed until the remaining number of bits is less than the predetermined number of bits L. until.

The multi-queue packet data transmission method according to claim 9, wherein the shortest length of the part does not include the length of the version identifier;

When the version identifier of the protocol data unit is 0, the preset bit number L _Q is 20.

The multi-queue packet data transmission method according to claim 2, wherein each of the protocol data units in the concatenated protocol data unit further comprises: a level indicating that the subsequent data is a protocol data unit or a padding field. Joint mark When the padding field does not exist, the concatenation flag is not included after the last protocol data unit in the concatenated protocol data unit.

The multi-queue packet data transmission method according to claim 14, wherein the method further comprises the steps of:

Determining, by the MAC-hs entity of the user equipment, the subsequent data according to the indication of the cascading flag, and if the subsequent data of the cascading flag is the protocol data unit, reading the protocol data unit; if the cascading flag The subsequent data is the padding field, and the decomposition is stopped;

When the cascading flag is not included after the protocol data unit, the decomposition is stopped.

The multi-queue packet data transmission method according to claim 2, wherein the header of each protocol data unit in the concatenated protocol data unit further includes a data for indicating that the subsequent data is the next protocol data. The header of the unit is also a concatenated flag of the payload portion of the protocol data unit.

The multi-queue packet data transmission method according to claim 16, wherein the method further comprises the steps of:

Determining, by the MAC-hs entity of the user equipment, the subsequent data according to the indication of the concatenation flag, and if the subsequent data of the concatenation flag is a header of the protocol data unit, reading a header of the protocol data unit If the subsequent data of the concatenation flag is the payload portion of the protocol data unit, the payload portion of each protocol data unit is separately decomposed using the decomposed headers of the respective protocol data units.

A multi-queue packet data transmission system, comprising: a MAC-hs entity on the network side and a MAC-hs entity in the user equipment, wherein the method further includes:

The multi-queue packet data transmission system according to claim 18, wherein the system further comprises: a split combination unit, located in the MAC-hs entity on the network side, connected to the cascade unit, And splitting a header and a payload portion of the protocol data unit of the at least two priority queues that receive the same user equipment, and respectively grouping the header and the payload of the split protocol data unit Hehe.

The multi-queue packet data transmission system according to claim 19, wherein the system further comprises: a priority queue allocation unit located in the MAC-hs entity on the network side, and a hybrid adaptive retransmission request Entity and transport format resource combination selection unit, where

The priority queue allocation unit is connected to the cascading unit, and is configured to allocate the service data units belonging to the same user equipment to at least two priority queues according to the priority of the service data unit, or It is sent to the cascading unit;

The hybrid adaptive retransmission requesting entity is connected to the cascading unit, and configured to transmit the concatenated protocol data unit to the transport format resource combination selecting unit;

The transport format resource combination selection unit is connected to the hybrid adaptive retransmission request entity, and is configured to select a transport format and a resource corresponding to the cascaded protocol data unit, and transmit the transport format and resources to the user equipment.

The multi-queue packet data transmission system according to claim 20, wherein the system further comprises: a hybrid adaptive retransmission request unit located in the MAC-hs entity of the user equipment, and a reordering queue allocation Unit and split unit, where

The hybrid adaptive retransmission request unit is connected to the de-cascading unit, and configured to receive the concatenated protocol data unit from the network side, and send the protocol data unit to the de-cascading unit;

The reordering queue allocating unit is connected to the de-cascading unit, and is configured to recover the original ordering of the protocol data unit according to the header of the protocol data unit obtained by the decomposing cascade, and restore the original The protocol data unit is divided into at least two of the reordering queues;

The splitting unit is connected to the rearrangement queue allocating unit, and configured to split the payload portion of the protocol data unit according to the restored original sort to obtain the service data unit of each priority queue. .