CA2326750A1 - Flexible radio access and resource allocation in a universal mobile telephone system (umts) - Google Patents

Flexible radio access and resource allocation in a universal mobile telephone system (umts) Download PDF

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Publication number
CA2326750A1
CA2326750A1 CA002326750A CA2326750A CA2326750A1 CA 2326750 A1 CA2326750 A1 CA 2326750A1 CA 002326750 A CA002326750 A CA 002326750A CA 2326750 A CA2326750 A CA 2326750A CA 2326750 A1 CA2326750 A1 CA 2326750A1
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Canada
Prior art keywords
radio
channel
service
ran
logical connection
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Granted
Application number
CA002326750A
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French (fr)
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CA2326750C (en
Inventor
Ina Widegren
Per Willars
Pontus Wallentin
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Telefonaktiebolaget LM Ericsson AB
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Individual
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Publication of CA2326750A1 publication Critical patent/CA2326750A1/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/16—Code allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/12—Access point controller devices

Abstract

The present invention provides flexible radio access and resource allocation in a Universal Mobile Telephone System (UMTS). A UMTS Terrestrial access network (UTRAN) in response to a radio access bearer service request, flexib ly and efficiently allocates resources necessary to support a communication wit h a mobile radio. The UTRAN includes plural base stations for communicating wi th mobile radios over a radio/air interface using radio channel resources allocated by a radio network controller connected to the base stations. External network service nodes interfacing with external networks communicat e with the UTRAN over a radio access network interface. The UTRAN provides a radio acccess bearer service to the external network service nodes, and radi o access bearers are dynamically assigned to radio channel resources by the UTRAN. When establishing each bearer, the UTRAN flexibly maps or allocates t he radio access bearer to physical transport resources through the UTRAN and radio channel resources over the radio/air interface. In an example embodiment, the transport between nodes and the UTRAN includes an ATM connection, and a radio channel over the air interface includes one or more CDMA spreading codes. The mapping is based on one or more parameters includi ng for example one or more quality of service parameters and/or current traffic conditions. In addition, if the one or more parameters changes during the li fe of the connection, the connection may be switched to a more appropriate channel type.

Claims (43)

1. A universal mobile telephone system (UMTS) providing communications with mobile radios, comprising:
a radio access network (RAN) including:
plural base stations for communicating with mobile radios over an air interface using allocated radio resources, and a radio network controller coupled to the plural base stations, and first and second service nodes that interface with first and second external networks, respectively, connected to the radio network controller over a RAN interface, where in response to a radio access bearer request from one of the first and second service nodes, the RAN provides a radio access bearer service to the one service node including: (1) establishing a logical connection between the one service node through the RAN to the mobile radio and (2) mapping the logical connection to one of plural, different types of channels, based on a UMTS traffic parameter including interference, and where the plural, different channel types include a dedicated channel that may not be shared with other mobile stations during the logical connection and a common channel that may not be shared by plural mobile stations during the logical connection, wherein the RAN maps the logical connection to a dedicated channel when the interference is greater than or equal to a threshold and to a common channel when the interference is less than the threshold.
2. The system in claim 1, wherein a dedicated channel uses a frame streaming transfer service provided by the RAN and a common channel uses a scheduled transport service provided by the RAN.
3. The system in claim 1, wherein the UMTS uses code division multiple access, and wherein the dedicated channel includes a spreading code that is assigned to and used only by the mobile station during the logical connection, and the common channel includes another spreading code that is provided to and may be shared by plural mobile stations during the logical connection.
4. The system in claim 1, wherein the RAN maps the logical connection to one of plural, different types of channels based on plural UMTS traffic parameters.
5. The system in claim 4, wherein if one of the UMTS traffic parameters relates to soft or softer handover, the RAN maps the logical connection to a dedicated channel.
6. The system in claim 4, wherein one of the UMTS traffic parameters is a characteristic of the radio access service, and the RAN maps a logical connection that requests a real time service to a dedicated channel.
7. The system in claim 4, wherein one of the UMTS traffic parameters is a characteristic of the radio access service, and the RAN maps a logical connection that requests a speech service to a dedicated channel.
8. The system in claim 1, wherein one of the UMTS traffic parameters is a characteristic of the radio access service, and the RAN maps a logical connection that requests bulk data transfer service to a dedicated channel.
9. The system in claim 1, wherein one of the UMTS traffic parameters is a characteristic of the radio access service, and the RAN maps a logical connection that requests a synchronized service to a dedicated channel.
10. The system in claim 4, wherein the RAN maps a logical connection that requests a high quality of service to a dedicated channel.
11. The system in claim 4, wherein one of the UMTS traffic parameters includes availability of dedicated channels, and the RAN maps the logical connection to a common channel when the availability is low.
12. The system in claim 4, wherein one of the UMTS traffic parameters includes congestion on the common channel, and the RAN maps the logical connection to a dedicated channel when the congestion is high.
13. The system in claim 4, wherein one of the plural UMTS traffic parameters includes plural quality of service parameters associated with the logical connection.
14. The system in claim 13, wherein one of the plural UMTS traffic parameters includes a quality of service parameter associated with the logical connection and a current traffic condition.
15. The system in claim 1, wherein the logical connection may be configured to transport one of four traffic classes: constant bit rate traffic, unspecified bit rate traffic, available bit rate traffic, and variable bit rate traffic, and wherein the RAN maps the logical connection of a channel based on a bit rate requested for one of the four traffic classes associated with the logical connection.
16. The system in claim 1, wherein the RAN includes:
a speech coder/decoder for coding and decoding speech frames transmitted and received over the air interface.
17. The system in claim 1, wherein the RAN multiplexes different logical connections associated with the mobile station onto one of the dedicated channels with the RAN handling the different logical connections as one channel.
18. The system in claim 1, wherein when a dedicated channel already exists between the RAN and the mobile radio, the RAN maps the logical connection to the already-existing dedicated channel.
19. The system in claim 1, wherein control signaling associated with a logical connection is generally transferred on the common channel, and control signaling associated with the logical connection mapped to a dedicated channel is also mapped to the same dedicated channel.
20. In a universal mobile telephone system that provides multimedia communications with mobile radios including a radio access network (RAN) having plural base stations coupled to a radio network controller for communicating over an air interface with mobile radios using allocated channel resources and a service node coupled to the RAN, a method comprising:
providing a RAN interface between the RAN and the service node that isolates the service node from specific radio access and control procedures;
setting up a logical connection between the service node and one of the mobile radios in response to a request to the RAN for a radio access bearer service;
establishing a transport path for the logical connection through the RAN; and mapping the logical connection to one of plural different types of radio channels, including a dedicated radio channel and a common radio channel, based on a quality of service parameter associated with the logical connection and a traffic condition in the RAN including an interference value at a cell in which the mobile station is currently located.
21. The method in claim 20, wherein for a high interference level, the logical connection is mapped to a dedicated radio channel.
22. The method in claim 20, wherein if the quality of service includes a speech service, the logical connection is mapped to a dedicated radio channel.
23. The method in claim 20, wherein if the quality of service includes a synchronized service, the logical connection is mapped to a dedicated channel.
24. The method in claim 20, wherein if the quality of service tolerates delay and the interference level in the cell where the mobile radio is currently located is below a threshold, the logical connection is mapped to the common radio channel.
25. The method in claim 20, wherein if the quality of service tolerates delay and a congestion level on the common channel is below a threshold, the logical connection is mapped to the common radio channel.
26. The method in claim 20, wherein if the quality of service tolerates delay and a number of available dedicated radio channels is below a threshold, the logical connection is mapped to the common radio channel.
27. The method in claim 20, further comprising:
determining if a dedicated channel currently exists for the mobile radio, and if so, mapping a signaling connection associated with the logical connection to the same dedicated radio channel.
28. The method in claim 20, further comprising:
detecting a change in the quality of service parameter associated with the logical connection or in the traffic condition in the RAN, and switching the type of radio channel associated with the logical connection based on the detected change.
29. The method in claim 20, wherein the quality of service parameter is soft or softer handover, and the radio channel is a dedicated channel.
30. In a universal mobile telephone system that provides multimedia communications with mobile radios including a radio access network (RAN) having plural base stations coupled to a radio network controller for communicating over an air interface with mobile radios using allocated channel resources and a service node coupled to the RAN, a method comprising:
providing a RAN interface between the RAN and the service node that isolates the service node from specific radio access and control procedures;
setting up a logical connection between the service node and one of the mobile radios in response to a request to the RAN for a radio access bearer service;
establishing a transport path for the logical connection through the RAN;
mapping the logical connection to one of plural different types of radio channels, including a dedicated radio channel and a common radio channel, based on a quality of service parameter associated with the logical connection and a traffic condition in the RAN; and if a dedicated channel currently exists for the mobile radio, and mapping the logical connection to the same dedicated radio channel.
31. A method for providing communication with a mobile radio currently operating in a particular geographic location area using a radio access network, comprising:
detecting a radio access service request for communication with the mobile radio;
initially determining a parameter value associated with the radio access service request for communication with the mobile radio, where the parameter includes data traffic intensity;

initially selecting one of plural radio channel types when a connection associated with the radio access request is established with the mobile radio based on the determined parameter value, where the plural radio channel types include a dedicated type radio channel and a common type radio channel;
monitoring the parameter value during the connection; and switching the connection to another of the plural radio channel types if the monitored parameter value changes from the initially determined parameter value.
32. The method in claim 31, wherein the dedicated radio channel delivers frames of information as received without substantial delay, and the common radio channel delivers frames of information in a scheduled manner.
33. The method in claim 31, wherein the data traffic intensity parameters value is determined using the interference level in a geographic location area in which the mobile radio is currently operating.
34. The method in claim 31, further comprising:
determining another parameter associated with the radio access service request, wherein the other parameter is the quality of service associated with the radio access service request.
35. The method in claim 31, further comprising:
determining another parameter associated with the radio access service request, wherein the other parameter is a current level of congestion on the common radio channel.
36. The method in claim 31, wherein the parameter includes plural parameters.
37. The method in claim 31, further comprising:
determining another parameter associated with the radio access service request, wherein the other parameter is a current availability of dedicated radio channels.
38. The method in claim 31, wherein a common radio channel is initially established for the connection, the method further comprising:
detecting that an interference level in a cell in which the mobile radio is located has increased, and switching the connection to a dedicated radio channel.
39. The method in claim 31, wherein a common radio channel is initially established for the connection, the method further comprising:
detecting that a congestion level on the common radio channel has increased, and switching the connection to a dedicated radio channel.
40. The method in claim 31, further comprising:
determining another parameter associated with the radio access service request, wherein the other parameter is the radio access service.
41. The method in claim 31, further comprising:
determining another parameter associated with the radio access service request, wherein the other parameter is the type of data to be transferred.
42. A method for providing communication with a mobile radio currently operating in a particular geographic location area using a radio access network, comprising:
detecting a radio access service request for communication with the mobile radio;
initially determining a parameter value associated with the radio access service request for communication with the mobile radio;
initially selecting one of plural radio channel types when a connection associated with the radio access request is established with the mobile radio based on the determined parameter value, where the plural radio channel types include a dedicated type radio channel and a common type radio channel;
monitoring the parameter value during the connection; and switching the connection to another of the plural radio channel types if the monitored parameter value changes from the initially determined parameter value, wherein a common radio channel is initially established for the connection, the method further comprising:
detecting that a quality of service associated with the connection has increased, and switching the connection to a dedicated radio channel.
43. A method for providing communication with a mobile radio currently operating in a particular geographic location using a radio access network, comprising:
detecting a radio access service request for communication with the mobile radio;
initially determining a parameter value associated with the radio access service request for communication with the mobile radio;

initially selecting one of plural radio channel types when a connection associated with the radio access request is established with the mobile radio based on the determined parameter value, where the plural radio channel types include a dedicated type radio channel and a common type radio channel;
monitoring the parameter value during the connection; and switching the connection to another of the plural radio channel types if the monitored parameter value changes from the initially determined parameter value, wherein a dedicated radio channel is initially established for the connection, the method further comprising:
detecting that a quality of service associated with the connection has decreased, and switching the connection to the common radio channel.
CA2326750A 1998-04-03 1999-04-01 Flexible radio access and resource allocation in a universal mobile telephone system (umts) Expired - Lifetime CA2326750C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US8054898P 1998-04-03 1998-04-03
US60/080,548 1998-04-03
PCT/SE1999/000552 WO1999052307A1 (en) 1998-04-03 1999-04-01 Flexible radio access and resource allocation in a universal mobile telephone system (umts)
US09/283,248 US6374112B1 (en) 1998-04-03 1999-04-01 Flexible radio access and resource allocation in a universal mobile telephone system
US09/283,248 1999-04-01

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CA2326750A1 true CA2326750A1 (en) 1999-10-14
CA2326750C CA2326750C (en) 2010-03-16

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US (1) US6374112B1 (en)
EP (1) EP1066729B1 (en)
JP (1) JP4354641B2 (en)
KR (1) KR100658293B1 (en)
CN (1) CN1135013C (en)
AU (1) AU756958B2 (en)
CA (1) CA2326750C (en)
DE (1) DE69925990T2 (en)
WO (1) WO1999052307A1 (en)

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