CN101877829A - Power control method for realizing load balance - Google Patents
Power control method for realizing load balance Download PDFInfo
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- CN101877829A CN101877829A CN2010102045386A CN201010204538A CN101877829A CN 101877829 A CN101877829 A CN 101877829A CN 2010102045386 A CN2010102045386 A CN 2010102045386A CN 201010204538 A CN201010204538 A CN 201010204538A CN 101877829 A CN101877829 A CN 101877829A
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Abstract
The invention provides a power control method for realizing load balance, belonging to the technical field of wireless communication. The method comprises the following steps of: dividing internet areas; judging the internet area in which a user is placed at this moment; performing access network section and bearing mode adjustment; immediately detecting a non access network by the user who is placed in an overlapped area, and performing network switch and bearing mode adjustment when the non access network transmits MBMS through a multi-broadcast bearing mode and when the base station transmission gross power of the network is less than the base station transmission gross power of the access network; re-judging the internet area in which a user is placed when the movement position of the user is changed; re-performing the network switch and the bearing mode adjustment when the access network of the user can not meet the requirement of the QoS of the user, and correspondingly adjusting the user who is placed in the overlapped network service area when the access network of the user can meet the requirement of the QoS of the user. Under the condition that the user is more, the method makes full use of wireless resource and network resource, thereby greatly reducing the power consumption of the network.
Description
Technical field
What the present invention relates to is a kind of method of wireless communication technology field, specifically is a kind of Poewr control method of realizing load balancing.
Background technology
Along with the fast development of mobile communications network, the network multimedia business continues to bring out, and people have higher requirement to receiving mobile multi-media service.Some mobile multi-media service requires a plurality of users to receive identical data simultaneously, as video request program, and television broadcasting, video conference, online education and interactive game etc.Mobile multi-media service and other data services (as short message, send and receive e-mail, WAP (Wireless Application Protocol, WAP (wireless application protocol)), JAVA browse etc.) are compared, and it is big to have data volume, and longer duration is to characteristics such as delay sensitives.At these characteristics of multimedia service, simultaneously, in order to effectively utilize mobile network resource, need in the mobile network, provide a data source to send the point-to-multipoint service of data to a plurality of users, the realization Internet resources are shared, and improve Internet resources, the interface resource utilance of especially eating dishes without rice or wine.3GPP (The 3rd GenerationPartnership Project, third generation partner program) standardization body is at UMTS (Universal MobileTelecommunications System, solution at multimedia service has just been proposed universal mobile telecommunications system), adopt a kind of network communication mode of point-to-multipoint, be called multimedia broadcast multi-broadcasting business, greatly conserve network bandwidth.At mobile network LTE (Long Term Evolution, Long Term Evolution) in the process of evolution, 3GPP proposes EPS (Evolved Packet System in the R8 version, evolved packet system), simultaneously, at MBMS (Multimedia Broadcast MulticastService, multimedia broadcast/group broadcast service) corresponding improvement has been proposed also.
Multimedia broadcast multi-broadcasting business is a unidirectional bearer service, and identical data are passed to a plurality of recipients from a data source.All user can shared channel resources in the sub-district, so more energy need be distributed to the MBMS transmission channel receives service with the user who guarantees cell edge quality.Therefore, the transmitting power to the base station requires very big.Simultaneously, determine, can not adopt power control according to channel situation as unicast transmission because multicast and broadcast transmits the cell range that covers.For the base station, transmitting power is a Limited resources, the number of users that in network, receives the same MBMS business seldom, with respect to the unicast transmission mode, the multicast transmission mode has just caused very big power resource waste.
Following mobile communications network will be tending towards diversification, and as the 3GPP network, the fusion of UMTS and EPS will be a kind of inexorable trend.Simultaneously, the development that has a portable terminal of diverse network interface can freely be selected it between the cellular network based on 3GPP.For MBMS, can reach the optimization of network performance by the resource reasonable distribution between heterogeneous network.
Find by prior art documents, A.Alexious etc. are at " Proceedings of IEEE InternationalSymposium on a World of Wireless, Mobile and Multimedia Networks (WOWMOM ' 07), PP.1-8, Espoo, Finland, June 2007 " on deliver be entitled as in " A Power Control Scheme for Efficient Radio BearSelection in MBMS (power control strategy that professional valid wireless carrying is selected at MBMS) " paper, propose a kind of power control strategy that effective transmission channel is selected under MBMS (multimedia broadcast/group broadcast service) framework, selected the transmission channel that base station transmitting power is reduced according to sub-district internal power consumption situation.When number of users more after a little while, it is lower to set up a plurality of unicast bearer consumed powers respectively.Along with the increase of number of users, adopt multicast transmission Channel Transmission power consumption lower.But the power control strategy that this technology is just selected at the carrying of MBMS in single UMTS, the selection strategy of multicast carrying when the heterogeneous network coexistence of a plurality of MBMS of providing is not provided, and the power consumption of network is very big.
Find by retrieval again, be published in " Communications, 2005.ICC 2005.2005 IEEE InternationalConference on Volume 2,16-20May 2005Page (s): 1372-1377 Vol.2 " on article " Multicast bearerselection in heterogeneous wireless networks (in the heterogeneous wireless network multicast carrying select) ", propose under the wireless network isomery situation of multiple access the optimum bearer path of multicast service and select problem.According to the suitable multicast carrying of Different Optimization target selections such as user preference and resource utilization.But this technology is only set up the multicast carrying, in conjunction with the transmitting power Elements Of Expense of base station, therefore, does not solve the selection problem of carrying transmission mode in the multicast transmission, makes that the power consumption of network is very big.
Summary of the invention
The objective of the invention is to overcome the above-mentioned deficiency of prior art, a kind of Poewr control method of realizing load balancing is provided.User among the present invention in heterogeneous network proposes MBMS and inserts application, the minimum service network of heterogeneous network overall power consumption is inserted in preferential selection and bearing mode is selected, when user's position is moved, according to the power consumption situation, EPS and UMTS carry out redistributing between network and the reselecting of bearing mode to load by cooperating, and network power consumption is obviously reduced; And adopt multimode user terminal as the relaying between heterogeneous network, information is mutual between the realization network.
The present invention is achieved by the following technical solutions, the present invention includes following steps:
Step 1, the Fusion Model of setting UMTS and EPS is divided into UMTS zone, EPS zone and UMTS, EPS overlapping region according to the zone that network covered with the network area.
Step 2 when the user proposes to receive the professional application of MBMS, is carried out user network area of living in and is judged, obtains residing network area user's this moment.
Described user judges that be: the user detects all networks that the MBMS business is provided, and detects the intensity of every kind of network signal in network area of living in, and wherein the zone at the network signal place of intensity maximum is exactly the residing network area of user.
Step 3 according to the residing network area of user, is carried out access network selection processing and bearing mode adjustment and is handled, and obtains user's Access Network and the bearing mode that the base station provides the MBMS business.
Described access network selection is handled, and is: when the residing network area of user was UMTS or the single network service area of EPS territory, the user directly inserted this network; When the residing network area of user is the overlapping region of UMTS and EPS and has only a network using multicast transmission bearing mode to transmit this MBMS when professional, then the user directly inserts this network, otherwise the user inserts the wherein higher network of signal strength signal intensity.
Described bearing mode adjustment is handled, and is: when the current MBMS of the providing business in base station was the multicast bearing mode, Access Network allowed the user directly to add this service groups, and still adopts the multicast bearing mode to provide MBMS for the user; The current MBMS of providing business is the unicast bearer pattern when the base station, and sets up the total transmitting power in the needed base station of unicast bearer greater than preset threshold C
kThe time, then this network still adopts the unicast bearer pattern to provide MBMS for the user, otherwise this network is used the multicast bearing mode instead and is provided MBMS for the user.
The described total transmitting power in the needed base station of unicast bearer of setting up is:
Wherein: L
P, i=128.1+37.6log10 (d
i),
P
T, kBe k user set up the total transmitting power in the needed base station of unicast bearer, P
NBe noise power, P
PBe the power of common signal channel, P is the interference factor of value between 0-1, R
B, iBe i user's transmission rate, W is a bandwidth, (E
b/ N
0)
iBe i user's signal to noise ratio, L
P, iBe i user's path loss, d
iBe the distance of i user and base station, d
iUnit be km, n is user's a sum.
Step 4, the user who is in the overlapping region is when selecting network insertion, in real time non-access network is detected, when finding that non-access network is when adopting multicast bearing mode MBMS transmission and the base station gross power of this network during less than the base station gross power of access network, the user switches to non-access network from present access network, carries out the bearing mode modulation treatment after the switching again.
Step 5 when the user shift position changes, is carried out user network area of living in again and is judged, obtains residing network area user's this moment.
Step 6 when the network that inserts at this moment as the user does not satisfy user's qos requirement, according to the method for step 3, carries out again that access network selection is handled and bearing mode adjustment processing; When the network that inserts at this moment as the user satisfied user's qos requirement, the user who is in single network service area territory did not adjust, and the user who is in the overlapping network coverage adjusts according to the method for step 4.
Compared with prior art, the present invention has following beneficial effect: the network integration that UMTS and EPS carry out in developing at mobile communication, comprehensive unicast bearer pattern and multicast bearing mode, under the more situation of user, make full use of wireless and Internet resources by cooperation between network, greatly reduce the power consumption of network.
Description of drawings
Fig. 1 is embodiment UMTS and EPS isomery schematic diagram;
Fig. 2 is transmitting power and the distance relation schematic diagram that embodiment sets up the unicast bearer base station;
Fig. 3 is the schematic diagram that concerns of the total emission power of embodiment base station when setting up unicast bearer and access customer number;
Fig. 4 be adopt respectively the embodiment method and at random the network power of access strategy consume comparison diagram.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated: present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed execution mode and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment
The concrete parameter of present embodiment is as follows: city macrocellular environment, and based on the 3GPP network of single honeycomb, UMTS and EPS network radius are 1000m, and network overlapped region distance is 800m.Wherein: base station maximum transmission power P
Max=43dBm, interference factor P=0.5, thermal noise N
0=-174dBm/HZ, public control signaling power P
p=30dBm, network bandwidth W=5MHZ, service provider is R for the transmission rate of the MBMS that all users provide
b=64kbps, user's qos requirement is BLER=1% during multicast transmission, and the transmitting power that corresponding base station covers whole network is 36dBm, and user's qos requirement is during unicast transmission
Be illustrated in figure 1 as UMTS and EPS isomery schematic diagram in the present embodiment scene, wherein: with dashed lines is irised out when initial in the overlapping region user's access network and is selected.In network the user more after a little while, UMTS and EPS all adopt unicast mode to provide MBMS for the user, at this moment, the power consumption minimum of base station.
Present embodiment specifically comprises the steps:
Step 1, the Fusion Model of setting UMTS and EPS is divided into UMTS zone, EPS zone and UMTS, EPS overlapping region according to the zone that network covered with the network area.
Step 2 when the user proposes to receive the professional application of MBMS, is carried out user network area of living in and is judged, obtains residing network area user's this moment.
Described user judges that be: the user detects all networks that the MBMS business is provided, and detects the intensity of every kind of network signal in network area of living in, and wherein the zone at the network signal place of intensity maximum is exactly the residing network area of user.
Step 3 according to the residing network area of user, is carried out access network selection processing and bearing mode adjustment and is handled, and obtains user's Access Network and the bearing mode that the base station provides the MBMS business.
Described access network selection is handled, and is: when the residing network area of user was UMTS or the single network service area of EPS territory, the user directly inserted this network; When the residing network area of user is the overlapping region of UMTS and EPS and has only a network using multicast transmission bearing mode to transmit this MBMS when professional, then the user directly inserts this network, otherwise the user inserts the wherein higher network of signal strength signal intensity.
Described bearing mode adjustment is handled, and is: when the current MBMS of the providing business in base station was the multicast bearing mode, Access Network allowed the user directly to add this service groups, and still adopts the multicast bearing mode to provide MBMS for the user; The current MBMS of providing business is the unicast bearer pattern when the base station, and sets up the total transmitting power in the needed base station of unicast bearer greater than preset threshold C
kThe time, then this network still adopts the unicast bearer pattern to provide MBMS for the user, otherwise this network is used the multicast bearing mode instead and is provided MBMS for the user.
The described total transmitting power in the needed base station of unicast bearer of setting up is:
Wherein: L
P, i=128.1+37.6log10 (d
i), (formula two)
P
T, kBe k user set up the total transmitting power in the needed base station of unicast bearer, P
NBe noise power, P
PBe the power of common signal channel, P is the interference factor of value between 0-1, R
B, iBe i user's transmission rate, W is a bandwidth, (E
b/ N
0)
iBe i user's signal to noise ratio, L
P, iBe i user's path loss, d
iBe the distance of i user and base station, d
iUnit be km, n is user's a sum.
Step 4, the user who is in the overlapping region is when selecting network insertion, in real time non-access network is detected, when finding that non-access network is when adopting multicast bearing mode MBMS transmission and the base station gross power of this network during less than the base station gross power of access network, the user switches to non-access network from present access network, carries out the bearing mode modulation treatment after the switching again.
Step 5 when the user shift position changes, is carried out user network area of living in again and is judged, obtains residing network area user's this moment.
Step 6 when the network that inserts at this moment as the user does not satisfy user's qos requirement, according to the method for step 3, carries out again that access network selection is handled and bearing mode adjustment processing; When the network that inserts at this moment as the user satisfied user's qos requirement, the user who is in single network service area territory did not adjust, and the user who is in the overlapping network coverage modulates according to the method for step 4.
When the base station adopts the multicast bearing mode of point-to-multipoint that MBMS is provided, its base station transmitting power is a steady state value, cover whole network, all users in the network coverage can receive this MBMS, and this constant transmit power value is by the coverage of base station, the transmission rate R of Transmission Time Interval TTI, MBMS
bAnd QoS (BLER) decision.TTI=20ms in the present embodiment, R
b=64kbps, BLER=1%, the transmitting power during base station multicast bearing mode is constant 4w.According to (formula one) and (formula two), in the time of can obtaining setting up unicast bearer, base station transmitting power and d
iRelation.
Transmission rate R as MBMS
b=64kbps, user's qos requirement is
The time:
A, base station are set up required transmitting power of unicast bearer and user terminal and base station distance and are concerned that schematic diagram as shown in Figure 2, as can be seen from Figure 2 along with user and base station distance increase, the transmitting power of base station also increases thereupon, as user during at network edge, the transmitting power of base station is near 0.05W;
The unicast bearer total emission power is set up with the variation schematic diagram of user and base station distance and access customer number as shown in Figure 3 in B, base station, Fig. 3 has provided the user respectively and base station distance is 0.2km, 0.5km when reaching 1km, the situation that the base station gross power changes with number of users.When user and base station distance were 1km, when inserting the user and reach 28, the bearing mode of base station transferred multicast to from clean culture greatly.
Adopt the network power of present embodiment method and existing access strategy at random to consume comparison diagram as shown in Figure 4 respectively, as can be seen from Fig. 4: when user in the network seldom (is lower than 60), UMTS and EPS adopt unicast mode that MBMS is provided, this moment, power control strategy slightly was better than the present embodiment method, but increase along with access customer number, when certain Network Transmission mode switch was the multicast bearing mode, the present embodiment method will obviously be better than access strategy at random.
Claims (5)
1. a Poewr control method of realizing load balancing is characterized in that, comprises the steps:
Step 1, the Fusion Model of setting UMTS and EPS is divided into UMTS zone, EPS zone and UMTS, EPS overlapping region according to the zone that network covered with the network area;
Step 2 when the user proposes to receive the professional application of MBMS, is carried out user network area of living in and is judged, obtains residing network area user's this moment;
Step 3 according to the residing network area of user, is carried out access network selection processing and bearing mode adjustment and is handled, and obtains user's Access Network and the bearing mode that the base station provides the MBMS business;
Step 4, the user who is in the overlapping region is when selecting network insertion, in real time non-access network is detected, when finding that non-access network is when adopting multicast bearing mode MBMS transmission and the base station gross power of this network during less than the base station gross power of access network, the user switches to non-access network from present access network, carries out the bearing mode modulation treatment after the switching again;
Step 5 when the user shift position changes, is carried out user network area of living in again and is judged, obtains residing network area user's this moment;
Step 6 when the network that inserts at this moment as the user does not satisfy user's qos requirement, according to the method for step 3, carries out again that access network selection is handled and bearing mode adjustment processing; When the network that inserts at this moment as the user satisfied user's qos requirement, the user who is in single network service area territory did not adjust, and the user who is in the overlapping network coverage adjusts according to the method for step 4.
2. the Poewr control method of realization load balancing according to claim 1, it is characterized in that, described user judges network area of living in, be: the user detects all networks that the MBMS business is provided, and detect the intensity of every kind of network signal, wherein the zone at the network signal place of intensity maximum is exactly the residing network area of user.
3. the Poewr control method of realization load balancing according to claim 1 is characterized in that, described access network selection is handled, and is: when the residing network area of user was UMTS or the single network service area of EPS territory, the user directly inserted this network; When the residing network area of user is the overlapping region of UMTS and EPS and has only a network using multicast transmission bearing mode to transmit this MBMS when professional, then the user directly inserts this network, otherwise the user inserts the wherein higher network of signal strength signal intensity.
4. the Poewr control method of realization load balancing according to claim 1, it is characterized in that, described bearing mode adjustment is handled, be: when the current MBMS of the providing business in base station is the multicast bearing mode, Access Network allows the user directly to add this service groups, and still adopts the multicast bearing mode to provide MBMS for the user; The current MBMS of providing business is the unicast bearer pattern when the base station, and sets up the total transmitting power in the needed base station of unicast bearer greater than preset threshold C
kThe time, then this network still adopts the unicast bearer pattern to provide MBMS for the user, otherwise this network is used the multicast bearing mode instead and is provided MBMS for the user.
5. the Poewr control method of realization load balancing according to claim 4 is characterized in that, the described total transmitting power in the needed base station of unicast bearer of setting up is:
Wherein: L
P, i=128.1+37.6log10 (d
i),
P
T, kBe k user set up the total transmitting power in the needed base station of unicast bearer, P
NBe noise power, P
PBe the power of common signal channel, P is the interference factor of value between 0-1, R
B, iBe i user's transmission rate, W is a bandwidth, (E
b/ N
0)
iBe i user's signal to noise ratio, L
P, iBe i user's path loss, d
iBe the distance of i user and base station, d
iUnit be km, n is user's a sum.
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| CN2010102045386A CN101877829B (en) | 2010-06-22 | 2010-06-22 | Power control method for realizing load balance |
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| EP2961224A4 (en) * | 2013-03-26 | 2016-03-30 | Huawei Tech Co Ltd | Network selection method, device and base station |
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| CN105766022A (en) * | 2013-08-29 | 2016-07-13 | 瑞典爱立信有限公司 | 3GPP bearer-based QoS model support on WIFI |
| WO2016161655A1 (en) * | 2015-04-10 | 2016-10-13 | 华为技术有限公司 | Multicast service transmission device and method |
| CN109792696A (en) * | 2016-09-27 | 2019-05-21 | T移动美国公司 | The power regulation based on load for cellular communication sites |
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| US9473906B2 (en) | 2013-03-22 | 2016-10-18 | Mediatek Inc. | Idle mode reception for group communication over LTE eMBMS |
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| WO2016161655A1 (en) * | 2015-04-10 | 2016-10-13 | 华为技术有限公司 | Multicast service transmission device and method |
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| CN101877829B (en) | 2012-08-29 |
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