CN101322326A - Methods and apparatus for controlling a base station's transmission power - Google Patents

Methods and apparatus for controlling a base station's transmission power Download PDF

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Publication number
CN101322326A
CN101322326A CNA200680045781XA CN200680045781A CN101322326A CN 101322326 A CN101322326 A CN 101322326A CN A200680045781X A CNA200680045781X A CN A200680045781XA CN 200680045781 A CN200680045781 A CN 200680045781A CN 101322326 A CN101322326 A CN 101322326A
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China
Prior art keywords
base station
power budget
load factor
load
factor information
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CNA200680045781XA
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CN101322326B (en
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厉隽怿
吴新宙
阿纳布·达斯
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Qualcomm Inc
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Qualcomm Inc
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Priority claimed from US11/251,069 external-priority patent/US8514692B2/en
Priority claimed from US11/302,729 external-priority patent/US20060092881A1/en
Priority claimed from US11/486,714 external-priority patent/US9191840B2/en
Priority claimed from US11/487,017 external-priority patent/US8503938B2/en
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Priority claimed from PCT/US2006/040543 external-priority patent/WO2007047670A1/en
Publication of CN101322326A publication Critical patent/CN101322326A/en
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Abstract

Methods and apparatus are described where loading information regarding loading conditions at a neighboring base station is received at a first base station and then communicated, e.g., broadcast, by the first base station to mobiles within the cell in which the first base station is located. Since the neighbor base station's loading information is being communicated to a mobile currently connected to the first base station via a reliable communications channel of the first base station, the mobile can be expected to be able to reliably recover loading factor information corresponding to not only the first base station but to the neighboring base station. By utilizing such loading factor information, the mobile can generate an improved uplink interference report. The first base station receives such interference reports from wireless terminals in its cell, facilitating efficient resource allocation and interference control.

Description

Be used to control the method and apparatus of base station's transmission power
Advocate priority 119 times at 35U.S.C. §
The application's case is the U.S.11/251 of application on October 14th, 2005, the continue U.S. patent application case 11/302 of application case, on December 14th, 2005 application of 069 part, the continue U.S. patent application case 11/486 of application case, on July 14th, 2006 application of 729 part, the U. S. application case 11/487 that 714 part continues application case and applied on July 14th, 2006,017 the part application case that continues, each of above application case is all incorporated this paper into way of reference clearly.
Technical field
The present invention relates to wireless communication system and, more particularly, the present invention relates to the power control in the wireless communication system.
Background technology
Comprising that (at least some in the wherein said base station are used same radio resources in a plurality of base stations, frequency spectrum for example) in the wireless communication system, can disturb the downlink transmission of other base stations (for example neighbor base station) of using same frequency spectrum from the downlink transmission of a base station.Downlink traffic channel load state at the certain base station tie point changes with a plurality of factors usually in time, and described factor comprises: the position of the application type in number of users, user type, the use, data volume to be passed on, degrees of fault-tolerance, stand-by period requirement, channel conditions, error rate and wireless terminal.The transmission power level that changes the Traffic Channel section can influence the attainable information data rate of particular wireless station machine, but has also changed the interference level of other wireless terminals of the different base station tie point that is connected to another base station (for example neighbor base station) of using same frequency spectrum from the angle of other wireless terminals.
By each base station tie point is used fixedly downlink transmitted power budget, the overall dl interference in the may command system.The power relevant with different subchannels in the downlink traffic channel can change along with the overall downlink power budget that remains fixed level.The method is the overall interference in the restriction system often, but can not utilize the different system load state to come the optimization process amount.
Can change its downlink transmitted power budget in response to the load state of the variation at himself or neighbor base station place if the base station is not limited to single downlink power budget, this is favourable so.If therefore neighbor base station exchange load information allows the base station to make timely decision about downlink transmission power levels, this is useful so.In addition, if the decision of the power budget of certain base station is carried out in described base station, this is useful so, because described base station has the relevant information that can be easy to utilize, therefore for example present load situation, current channel conditions, user's overview, the change that is detected, ongoing application help the fast notification response to changing condition.
Summary of the invention
Various embodiments is aimed at the method and apparatus that is used to pass on, collect, measure, report and/or use the information of the dynamic change that can be used for Interference Control purpose, load management and/or base station down link power budget.
According to various embodiments, the base station receives the load information of the load of other base stations of indication (for example neighbor base station), and the downlink transmitted power budget is determined according to the on-load factor information that is received in the base station.For instance, the base station can reduce the current power budget that is exclusively used in the downlink traffic channel section in response to the increase of the load that detects neighbor base station.The base station can increase the current power budget that is exclusively used in the downlink traffic channel section in response to the reduction of the load that detects neighbor base station.Therefore, the base station is to reduce the approach to cooperation operation of power output, and (wherein the load of adjacent base station increases) reduces whereby to having the interference of the base station that increases load at least some cases.This with can attempt to increase power in response to the load of the increase of adjacent base station and export to overcome and form sharp contrast by having the system that the increase that adjacent base station produced that increases traffic load disturbs.But described method and apparatus is particularly suited for using in the communication system of a plurality of base stations that comprise the phase mutual interference.This is because in comprising the wireless communication system of a plurality of base stations, produces interference with respect to other base stations (for example neighbor base station) of using same frequency spectrum from the downlink transmission of a base station.The base station can consider that the choice that possible substituting transmission power level, the interference level through estimating and/or possible alternative data speed are made about downlink power budget (for example for downlink traffic channel) determines.
The exemplary method of operating first base station according to various embodiments comprises: receive the second base station on-load factor information of indication corresponding to the load of the second base station tie point of second base station; With determine the downlink transmitted power budget according to the described second base station on-load factor information that receives.Exemplary base station according to various embodiments comprises: interface, and it is used to receive the signal of reception and registration indication corresponding to the base station on-load factor information of the load of at least one base station tie point of at least one other base station; On-load factor information is recovered module, and it is used for from the on-load factor information of the described signal recovery that receives corresponding at least one other base station; And downlink transmitted power budget determination module, wherein said downlink transmitted power budget determination module is according to the described downlink transmitted power budget of determining the tie point of described base station through the on-load factor information of recovering corresponding at least one other base station.
Though in above summary of the invention, various embodiments has been discussed, should understand and need not all embodiment and comprise identical feature, and some features mentioned above and nonessential but can be needed in certain embodiments.Discuss in numerous additional features of the present invention, embodiment and the benefit detailed description hereinafter.
Description of drawings
Fig. 1 is the figure according to the example wireless communication system of various embodiments enforcement.
Fig. 2 is the figure according to the exemplary base station of various embodiments.
Fig. 3 is the figure according to the exemplary wireless terminal of various embodiments.
Fig. 4 is for operating the figure of flow chart of the exemplary method of first base station in comprising the multi-address radio communication system of a plurality of base stations according to various embodiments.
Fig. 5 is for operating the figure of flow chart of the exemplary method of first base station in comprising the multi-address radio communication system of a plurality of base stations according to various embodiments.
Fig. 6 is for operating the figure of flow chart 600 of the exemplary method of first base station in comprising the multi-address radio communication system of a plurality of base stations according to various embodiments.
Fig. 7 is the figure that is used to illustrate the feature of various embodiments, and wherein the base station in comprising the wireless communication system of a plurality of base stations receives and determines the downlink transmitted power budget corresponding to the on-load factor information of another base station and according to the base station on-load factor information of described reception.
Fig. 8 is the figure that is used to illustrate the feature of various embodiments, and wherein the base station in comprising the wireless communication system of a plurality of base stations receives and determines the downlink transmitted power budget corresponding to the on-load factor information of another base station and according to the base station on-load factor information of described reception.
Fig. 9 is the figure that is used to illustrate the feature of various embodiments, and wherein the base station in comprising the wireless communication system of a plurality of base stations receives and determines the downlink transmitted power budget corresponding to the on-load factor information of another base station and according to base station on-load factor information.
The Figure 10 that comprises the combination of Figure 10 A and Figure 10 B is the figure according to the flow chart of the exemplary method of various embodiments operation base station.
Embodiment
Fig. 1 is the figure of the example wireless communication system 100 (for example multiple access OFDM wireless communication system) according to various embodiments.Example wireless communication system 100 comprise a plurality of base stations (base station 1102 ..., base station M 104) and network node 110.Each base station (102 ..., 104) comprise at least one base station tie point.The base station (102 ..., 104) can comprise one or more sectors and use one or more carrier waves.For instance, in some embodiment of some base stations, the base station tie point is corresponding to the combination of sub-district and carrier wave.In certain embodiments, the base station tie point of some base stations is corresponding to the combination of sub-district, sector and carrier wave.Network node 110 is coupled to (base station 1102, base station M 104) via network link (120,122) respectively.Network node 110 also is coupled to other network nodes and/or internet via network link 124.Network link 120,122,124 is (for example) optical fiber link, wire link and/or Radio Link.Each base station (base station 1102, base station M 104) has corresponding radio coverage (sub-district 1106, sub-district M 108) respectively.
Communication system 100 also comprises a plurality of wireless terminals, mobile node for example, and it can move and be connected to the base station in whole system, and wireless terminal is currently located in the area of coverage of described base station.Be currently located at wireless terminal in the sub-district 1106 (WT 1112 ..., WT N114) respectively via Radio Link (126 ..., 128) be coupled to base station 1102.Be currently located at wireless terminal among the sub-district M 108 (WT 1 ' 116 ..., WT N ' 118 ') respectively via Radio Link (130 ..., 132) be coupled to base station M 104.
The load information from other base stations (for example neighbor base station) is also considered at least some base stations in the system 100 except that considering himself load, and comes (for example) dynamically to adjust its downlink transmitted power budget according to the load of other base stations (for example neighbor base station).In certain embodiments, the base station is made corresponding to himself independently the determining of its downlink power budget of one in its base station tie point, describedly determines but utilize near the load information of other base stations (for example neighbor base station) the local that is received to make.
Fig. 2 is the figure according to the exemplary base station 200 of various embodiments enforcement.Exemplary base station 200 can be any one in the base station of Fig. 1 or Fig. 4 or Fig. 5 or Fig. 6.Exemplary base station 200 comprises receiver module 202, transmitter module 204, processor 206, I/O interface 208 and the memory 210 that is coupled via bus 212 (multiple element is swap data and information mutually) thereon.
Receiver module 202 (for example OFDM receiver) is coupled to reception antenna 216, the uplink signal that base station 200 receives from wireless terminal via described reception antenna 216.In certain embodiments, uplink signal comprises the base station on-load factor information corresponding to other base stations in the described communication system, and (for example) wherein is connected to the wireless terminal of base station 200 and another base station (for example neighbor base station) as repeater.
Transmitter module 204 (for example OFDM transmitter) is coupled to transmit antenna 218, base station 200 via described transmit antenna 218 transmitted downlink signals to wireless terminal.Down link signal comprises traffic channel signal and pilot frequency channel signal, wherein the power budget of traffic channel signal according to corresponding to the on-load factor information of other base stations (for example neighbor base station) and corresponding to the on-load factor information of base station 200 Be Controlled.
I/O interface 208 is coupled to internet and/or other network nodes, for example neighbor base station with base station 200.On-load factor information exchanges between base station 200 and other base stations (for example neighbor base station) via I/O interface 208.Therefore, I/O interface 208 receives and passes on the signal of indication corresponding to the base station on-load factor information of the load of at least one base station tie point of at least one other base station (for example neighbor base station).
Memory 210 comprises routine 220 and data/information 222.Processor 206 (for example CPU) executive routine 220 also uses data/information 222 in the memory 210 to control the operation and the implementation method of base station 220.
Routine 220 comprises communication routines 224 and base stations control routine 226.The various communications protocols that communication routines 224 is implemented by base station 200 uses.Base stations control routine 226 comprises scheduler 228, pilot channel signalling module 230, Traffic Channel signalling module 232, on-load factor information recovery module 234, downlink transmitted power budget determination module 236, on-load factor determination module 238, on-load factor comparison module 240 and on-load factor tracing module 242.In certain embodiments, at least one part as downlink transmitted power budget determination module 236 in on-load factor comparison module 240 and the on-load factor tracing module 242 is included in wherein.
Scheduler 228 scheduling wireless terminals are to down link and uplink traffic channel section.The generation and the transmission of pilot channel signalling module 230 control pilot frequency channel signals, for example circulation regularly with frequency structure in the known modulation symbol of predetermined power level in precalculated position.In this one exemplary embodiment, corresponding to the pilot frequency channel signal of base station tie point to transmit with the irrelevant every tone same transmission power level of the down link load state of base station 200 or neighbor base station.The generation and the transmission of Traffic Channel signalling module 232 control Traffic Channel section signals (for example downlink traffic channel section signal).For downlink traffic channel, the total power budget relevant with base station 200 tie points is in response to dynamically being adjusted by determining of downlink transmitted power budget determination module 236.Indivedual subchannels in the downlink traffic channel can and sometimes with different power level transmission.
On-load factor information is recovered module 234 and is recovered on-load factor information corresponding to the base station tie point of other base stations (for example neighbor base station) from the signal that is received.For instance, on-load factor information is recovered module 234 signal (BS 2 signals (1) 244 that received, BS 2 signals (n) 246 that received, the BS n-signal (1) 252 that is received, the BS n-signal (n) 254 that the is received) acquisition (the BS 2LF (t1) 248 through recovering, the BS 2LF (tn) 250 through recovering, the BS N LF (t1) 256 through recovering, the BS N LF (tn) 258 through recovering) from being received respectively.On-load factor information in various embodiments is the downlink transport load about the base station tie point, for example the downlink traffic channel load of base station tie point.
Downlink transmitted power budget determination module 236 is according to the downlink transmitted power budget of determining one or more tie points of base station 200 corresponding to the on-load factor information through recovering of at least one other base station (for example other neighbor base stations).In various embodiments, determined power budget is the power budget that comprises one group of downlink communication channel of an at least one pilot channel and a data traffic channels.In some described embodiment, the part of the power budget that the warp of pilot channel is determined has nothing to do with on-load factor information, and depends on the base station on-load factor information of other base stations (for example neighbor base station) and the on-load factor information of base station 200 corresponding to the part of the power budget of described data traffic channels.For instance, the power level transmission of every tone that pilot frequency channel signal can be not change with load, and the on-load factor that the traffic channel signal transmission power level can be determined with the warp of base station 200 tie points changes with the on-load factor through receiving corresponding to the tie point of neighbor base station.The result of on-load factor comparison module 240 can be by determination module 236 as input.The output of through-put power budget (time T n) 270 that through-put power budget (time T 1) 264 through determining is definite with warp for picking up from determination module 236.
For each tie point of base station 200, the on-load factor that on-load factor determination module 238 is determined corresponding to the tie point of base station 200.Base station on-load factor (time t1) 260 through determining and the 262 expression determination modules 236 of the base station on-load factor (time tn) through determining are corresponding to the output of same base 200 tie points at different time.
On-load factor that on-load factor comparison module 240 is relatively determined corresponding to the warp of the tie point of base station 200 and on-load factor through recovering corresponding to the tie point of another base station (for example neighbor base station).
In certain embodiments, the load of tie point of determining other base stations (for example neighbor base station) of relating to when on-load factor comparison module 240 in described comparison is during greater than the load of the tie point of base station 200, and downlink transmitted power budget determination module 236 determines that described power budgets are with first value corresponding to the described budget of indication; And, the load of tie point of determining other base stations (for example neighbor base station) of relating to when on-load factor comparison module 240 in described comparison is during less than the load of the tie point of base station 200, downlink transmitted power budget determination module 236 determine described power budgets with corresponding to indication greater than second value by the power budget of the indicated power budget of described first value.
In certain embodiments, the base station of a height load sends its on-load factor to a neighbor base station, and the described base station that expection receives described on-load factor will have lower load and will reduce its through-put power budget.This treating capacity that then will reduce interference that described height load base station experienced and the base station that allows described height load increases.
On-load factor tracing module 242 is followed the trail of the change of the on-load factor of base station tie points (for example corresponding to the tie point of base station 200 and tie point corresponding to other base stations (for example neighbor base station)).Be used for determining the power budget of the base station tie point of base station 200 by downlink transmitted power budget determination module 236 by the detected change of on-load factor tracing module 242 identification.In certain embodiments, downlink transmitted power determination module 236 reduces the current power budget of the tie point of base station 200 in response to the increase of the load of detected other base stations (for example neighbor base station), and downlink transmitted power determination module 236 increases described current power budget in response to the reduction of the load of detected other base stations (for example, neighbor base station).In certain embodiments, described downlink transmitted power determination module 236 increases the current power budget of the tie point of base station 200 in response to the increase of the load of the tie point of detected base station 200, and downlink transmitted power determination module 236 reduces the current power budget in response to the reduction of the load of the tie point of detected base station 200.
Data/information 222 comprise received carry in time signal corresponding to the on-load factor information of a plurality of base stations ((base station 2 signals (1) 244 that received ..., base station 2 signals (n) 246 that received) ..., (the base station n-signal (1) 252 that is received ..., the base station n-signal (n) 254 that received)).In certain embodiments, the signal of the described conveying on-load factor information that receives is carried via backhaul network by I/O interface 208.In certain embodiments, the described signal that receives is received by receiver 202, for example, wherein is coupled to the described information of wireless terminal relaying of two base stations.Data/information 210 also comprises (BS 2 on-load factors (t1) 248 through recovering of the base station 2 on-load factor information through recovering of base station 2 loads that are illustrated in different time, ..., BS 2 on-load factors (tn) 250 through recovering), be illustrated in (the BS N on-load factor (t1) 256 of the base station N on-load factor information through recovering of the base station N load of different time through recovering, ..., BS N on-load factor (tn) 258 through recovering) and be illustrated in BS 200 on-load factor information (the BS on-load factor (t1) 260 that the warp of base station 200 loads of different time is determined through determining, ..., BS on-load factor (tn) 262 through determining).
Data/information 222 also comprise for BS 200 in time the downlink power budget information through determining (the downlink transmitted power budget (T1) 264 through determining ..., the downlink transmitted power budget (Tn) 270 through determining).Downlink transmitted power budget information 264 through determining comprises the downlink traffic channel budget information (T1) 268 that pilot channel budget information 266 and warp are determined, the downlink transmitted power budget (Tn) 270 through determining then comprises the downlink traffic channel power budget (Tn) 272 that pilot channel power budget information 266 and warp are determined.In this one exemplary embodiment, the pilot frequency channel signal transmission power level does not change with load state; Yet the downlink traffic channel power budget can (and certain sometimes) change with the load state of (for example) neighbor base station and/or base station 200 and/or the change of load state.
Data/information 222 also comprises standard of comparison 274, active user's number 276, overstocked downlink traffic amount of information 278 and the downlink channel conditions information of revising power budget.The standard of comparison 274 of revising power budget comprises on-load factor comparison module 240, on-load factor tracing module 242 and/or downlink transmitted power budget determination module 236 employed predetermined thresholds.Active user's number 276 comprises that (for example) is corresponding in the number of users of the current registration at 200 tie point places, base station, number of users in the activity and/or the information of opening number of users.Overstock downlink traffic channel amount of information 278 and comprise that (for example) identification is corresponding to the information of the mac frame number of each active user's of base station 200 downlink traffic waiting for transmission and the identification information corresponding to the mac frame number of the compound downlink traffic waiting for transmission of registered users.Downlink channel conditions information 280 comprises (for example) channel conditions metrical information corresponding to the active user of base station 200, for example snr measurement information and/or signal-interference ratio measurement information.Active user's information of number 276, overstock in downlink traffic channel amount of information 278 and the downlink channel conditions information 280 at least some be used for determining on-load factor by on-load factor determination module 238 corresponding to base station 200 tie points.
Fig. 3 is the figure of the exemplary wireless terminal 300 (for example mobile node) according to various embodiments.Exemplary wireless terminal 300 can be any one in the exemplary wireless terminal of Fig. 1 or Fig. 4 or Fig. 5 or Fig. 6.Exemplary wireless terminal 300 comprises first receiver module 302, first transmitter module 304, processor 306, I/O device 308 and the memory 310 that is coupled via bus 312 (multiple element is exchange data information mutually) thereon.In certain embodiments, wireless terminal 300 also comprises second receiver module 318 and second transmitter module 320 that also is coupled to bus 312.
First receiver module 302 (for example OFDM receiver) is coupled to reception antenna 314, the down link signal that wireless terminal 300 receives from the base station via described reception antenna 314.Down link signal comprises the request of assigning signal (for example the downlink traffic channel section is assigned signal), downlink traffic channel section signal, requiring wireless terminal relay base station load information, the order that requires wireless terminal relay base station load information and/or base station tie point load information.
First transmitter module 304 (for example OFDM transmitter) is coupled to transmit antenna 316, and wireless terminal 300 arrives the base station via described transmit antenna 316 transmitting uplink signals.In certain embodiments, receiver module 302 uses same antenna with transmitter module 304, for example combines with duplex module.Uplink signal comprises Dedicated Control Channel report (for example, SNR report), uplink traffic channel section signal, inserts signal, power control signal, timing controling signal and handover signal.Uplink signal also comprises the message of conveying corresponding to the on-load factor information of a base station tie point, (for example) wherein wireless terminal as the repeater between two neighbor base stations.
Second receiver module 318 (for example OFDM receiver) is coupled to reception antenna 322, the down link signal that wireless terminal 300 receives from the base station via described reception antenna 322.Down link signal comprises the request of assigning signal (for example the downlink traffic channel section is assigned signal), downlink traffic channel section signal, requiring wireless terminal relay base station load information, the order that requires wireless terminal relay base station load information and/or base station tie point load information.
Second transmitter module 320 (for example OFDM transmitter) is coupled to transmit antenna 324, and wireless terminal 300 arrives the base station via described transmit antenna 324 transmitting uplink signals.In certain embodiments, receiver module 318 uses same antenna with transmitter module 324, for example, combines with duplex module.Uplink signal comprises Dedicated Control Channel report (for example SNR report), uplink traffic channel section signal, inserts signal, power control signal, timing controling signal and handover signal.Uplink signal also comprises the message of conveying corresponding to the load information (for example down link on-load factor) of base station tie point, (for example) wherein wireless terminal as the repeater between two base stations.
I/O device 308 (for example keypad, keyboard, microphone, switch, display, loud speaker etc.) allows user input data/information of WT 300, access dateout/information.Input unit 308 also allows the user to control at least some functions of wireless terminal, the communication session of for example initial and peer node.
Memory 310 comprises routine 326 and data/information 328.Processor 306 (for example CPU) executive routine 326 also uses data/information 328 in the memory 310 to control the operation and the implementation method step of wireless terminal 300.Routine 326 comprises communication routines 330 and base stations control routine 332.Communication routines 330 is implemented by wireless terminal 300 employed various communications protocols.Base stations control routine 332 comprises on-load factor relay request/order monitor module 334, on-load factor recovery module 336 and on-load factor trunk module 338.
On-load factor request/order monitor module 334 monitors institute's receiving downlink signaling of the request and/or the order that are used to be directed to wireless terminal 300, described request and/or order indication wireless terminal 300 receive from first base station corresponding to the base station on-load factor information (for example, downlink traffic channel base station load information) of one or more tie points and the described on-load factor information of relaying to second base station.In certain embodiments, (wherein said wireless terminal supports to arrive two communication links of two different base station tie points simultaneously) uses described on-load factor relay request/order monitor module 334 when wireless terminal 300 is in the wireless terminal operator scheme.For instance, WT 300 can be multi-link operator scheme, it is current to be coupled to first base station and simultaneously via receiver/transmitter module (318/320) to be coupled to second base station (302/304) via receiver/transmitter module, and monitor module 334 detects request or order wireless terminal 300 and transmits down link load information about the first base station tie point to second signal of base station.In certain embodiments, if wireless terminal receives the request that transmits on-load factor information, and wireless terminal is not to be multi-link pattern, and wireless terminal can change multi-link pattern in response to the request/order of the transmission on-load factor information that is received so.
Recover module 336 in response to the on-load factor of request that is detected by module 334 or order and recover load information from the down link signal that is received, for example, downlink base station tie point load information.The on-load factor trunk module 338 that recovers module 336 in response to on-load factor produces the message of carrying the on-load factor information through recovering, and it is communicated to another base station (for example neighbor base station) via uplink signalling.On-load factor trunk module 336 is also controlled the transmission of the described relay message that produces.
Data/information 328 comprises the request/order 340 of the relaying on-load factor information that is received, the base station on-load factor information 342 that is received, base station on-load factor information 344, system base-station information 346 and the wireless terminal operation mode information 348 that is produced.Request/the order 340 of the relay base station on-load factor information that is received comprises the request and/or the order that require wireless terminal 300 to be used as repeater and to transmit on-load factor information between the base station that is received.In certain embodiments, base station, described request identifying purpose ground.In certain embodiments, wireless terminal uses the system base-station information 346 of being stored to determine can be subjected to influence from the downlink signaling of source base station tie point the relevant destination base station (for example neighbor base station) of (for example disturbing).The base station on-load factor information 342 that the is received base station tie point on-load factor of downlink traffic channel load (for example corresponding to) is the output that recovers module 336 and the input of on-load factor trunk module 338.The base station on-load factor relay message that is produced is the output of on-load factor trunk module 338 and the input that is used as Wireless Transmitter module (for example module 304 or module 320).System base-station information 346 comprise corresponding to the information of a plurality of base stations in the wireless communication system (base station 1 information 350 ..., base station n information 352).Base station 1 information 350 comprises corresponding to each the information in the tie point of base station 1, for example downlink carrier information, downlink tone block information, uplink carrier information, uplink carrier information, channel architecture information, tone jump information, power level information, message structure information, circulation timing architecture information etc.WT operation mode information 348 comprises that identified wireless terminal machine 300 is the single attended operation pattern or the information of multi-link operator scheme.
Fig. 4 is for operating the figure of flow chart 400 of the exemplary method of first base station in comprising the multi-address radio communication system of a plurality of base stations according to various embodiments.Each base station in example communications system comprises at least one base station tie point, and near the wireless terminal (for example mobile node) the described base station can be connected to network via described at least one base station tie point.The base station can comprise one or more sectors.In this one exemplary embodiment, a base station tie point is corresponding to a base station section, uplink carrier, up link OFDM tone blocks, downlink carrier and down link OFDM tone blocks.
Operation starts from step 402, is energized in this step the first base station and initialization, and proceeds to step 404.In step 404, first base station receives the second base station on-load factor information of indication corresponding to the load of the second base station tie point of second base station.Described second base station can and be close to described first base station sometimes.The exemplary load information of base station (for example comprises the number of the terminating machine in the activity that is connected, the service quality of described terminating machine (QoS) overview, the number of high qos value terminating machine is with respect to the number of low qos value terminating machine), the QoS overview of the business relevant with described terminating machine (for example, the amount of audio or video business is with respect to the amount of best effort data service) and the activity supporting to be connected in the required radio link resource (for example, power and bandwidth) of the required business of terminating machine.For instance, when speech business that base station services increases, load can increase.In addition, though described base station according to the identical traffic carrying capacity of the figure place of per second service, if most of terminating machine that connects is far away when nearby comparing with most of terminating machines that are connected apart from the base station, load can be different.Reason is the required radio link resource of supporting business (power specifically) difference.Operation proceeds to step 406 from step 404.
In step 406, first base station is according to determining the downlink transmitted power budget corresponding to the extra load factor information of another base station tie point, the tie point that described another base station tie point is described first base station.For instance, another tie point of described first base station and second tie point of described second base station can be corresponding to the nearby sectors of using identical downlink carrier frequency with identical downlink tone block, and the definite downlink transmitted power budget of described warp can be corresponding to another base station tie point of described first base station.In certain embodiments, the definite downlink transmitted power budget of described warp is used to comprise one group of downlink communication channel of an at least one pilot channel and a data traffic channels.In some described embodiment, first's (described first is used in pilot channel through branch) of the power budget through determining is irrelevant with the described first on-load factor information and the second on-load factor information, and the second portion (described second portion is equipped with corresponding to data traffic channels through branch) of the power budget determined of described warp depends on second base station on-load factor information and the extra load factor information.For instance, corresponding to the pilot frequency channel signal of the extra tie point of first base station to broadcast with the irrelevant first predetermined transmission power level of the load state of the second on-load factor information and extra load factor information; Yet, transmit with the power level that becomes with the second on-load factor information and extra load factor information corresponding to the traffic channel signal of the extra tie point of described first base station.Step 406 comprises substep 408,410,412,414,416 and 418.
Described extra load factor information and the described second base station on-load factor information in more described first base station, substep 408, the first base stations.Can refer to down link, for example down link load of downlink traffic channel radio link resource through on-load factor information relatively.Operation proceeds to substep 410 from substep 408.More whether that determines substep 408 in substep 410, the first base stations indicates the second base station load greater than the described first base station load.If the inspection of step 410 indicates the second base station load greater than the first base station load, operation proceeds to step 412 so, and first value of described power budget corresponding to the described budget of indication determined in wherein said base station; Otherwise operation proceeds to substep 414 from substep 410.
At substep 414, described first base station determines that the described second base station load of more whether indicating of substep 408 is less than the described first base station load.If the inspection of step 414 indicates the second base station load less than the described first base station load, operation proceeds to substep 416 so, and wherein said base station determines that described power budget is corresponding to second value of indication greater than the power budget of the indicated power budget of described first value; Otherwise operation proceeds to substep 418 from substep 414.At substep 418, three value of described power budget corresponding to the described budget of indication determined in described first base station.For instance, described the 3rd value can indicate the power budget indicated by described first value and by described second value power budget between the indicated power budget.
In certain embodiments, the value of the base station load that will compare in step 410 and 420 is through being quantified as the expression that actual loading is determined, and proceed to step 418 and can indicate the first base station load quantification degree value identical, indicate first base station and the second base station actual loading to determine roughly the same with the second base station load quantification degree value.
In certain embodiments, whether step 410 checks the second base station load greater than the described first base station load, one predetermined first amount, and step 410 checks that whether the described second base station load is greater than the described first base station load, one predetermined second amount.Therefore, if operation proceeds to step 418, indicate described first base station load and the described second base station load roughly the same so.
Fig. 5 is for operating the figure of flow chart 500 of the exemplary method of first base station in comprising the multi-address radio communication system of a plurality of base stations according to various embodiments.Each base station in described example communications system comprises at least one base station tie point, and near the wireless terminal described base station (for example mobile node) can be connected to network via described at least one base station tie point.The base station can comprise one or more sectors.In this one exemplary embodiment, a base station tie point is corresponding to a base station section, uplink carrier, up link OFDM tone blocks, downlink carrier and down link OFDM tone blocks.
Operation starts from step 502, and in this step, described first base station is energized and initialization, and proceeds to step 504.In step 504, described first base station receives the second base station on-load factor information of indication corresponding to the load of the second base station tie point of second base station.Second base station can and be close to described first base station sometimes.Operation proceeds to step 506 from step 504.
In step 506, first base station is according to determining the downlink transmitted power budget corresponding to the extra load factor information of another base station tie point, the tie point that described another base station tie point is first base station.For instance, another tie point of described first base station and second tie point of described second base station can be corresponding to the nearby sectors of using identical downlink carrier frequency with identical downlink tone block, and the definite downlink transmitted power budget of described warp can be corresponding to another base station tie point of first base station.In certain embodiments, the downlink transmitted power budget through determining is used to comprise one group of downlink communication channel of an at least one pilot channel and a data traffic channels.In some described embodiment, first's (described first is used in pilot channel through branch) of the power budget through determining is irrelevant with the first on-load factor information and the second on-load factor information, and the second portion (described second portion is equipped with corresponding to data traffic channels through branch) of the power budget through determining depends on second base station on-load factor information and the extra load factor information.For instance, corresponding to the pilot frequency channel signal of the described extra tie point of described first base station to broadcast with the irrelevant first predetermined transmission power level of the load state of described second on-load factor information and described extra load factor information; Yet, transmit with the power level that becomes with the second on-load factor information and extra load factor information corresponding to the traffic channel signal of the extra tie point of first base station.Step 506 comprises substep 508,510,512,514 and 516.
More current second base station on-load factor information and the previously stored second base station on-load factor information in substep 508, the first base stations.Can refer to down link, for example down link load of downlink traffic channel radio link resource through on-load factor information relatively.Operation proceeds to substep 510 from substep 508.Determine the increase of relatively indicating the described second base station load, the still nothing change of reduction of substep 508 in substep 510, the first base stations.If the load of second tie point that is defined as second base station of step 510 increases, operation proceeds to step 512 so, reduces the downlink transmitted power budget in this step the first base station.If the load that is defined as second base station of step 510 does not change, operate from step 510 proceeding to step 516 so, in step 516, described first base station does not change the downlink transmitted power budget.If the load of second tie point that is defined as second base station of step 510 reduces, operation proceeds to step 514 so, and in this step, first base station increases the downlink transmitted power budget.
Fig. 6 is for operating the figure of flow chart 600 of the exemplary method of first base station in comprising the multi-address radio communication system of a plurality of base stations according to various embodiments.Each base station in described example communications system comprises at least one base station tie point, and near the wireless terminal described base station (for example mobile node) can be connected to network via described at least one base station tie point.One base station can comprise one or more sectors.In this one exemplary embodiment, a base station tie point is corresponding to a base station section, uplink carrier, up link OFDM tone blocks, downlink carrier and down link OFDM tone blocks.
Operation starts from step 602, is energized in this step the first base station and initialization, and proceeds to step 604.In step 604, first base station receives the second base station on-load factor information of indication corresponding to the load of the second base station tie point of second base station.Second base station can and be close to described first base station sometimes.Operation proceeds to step 606 from step 604.
In step 606, first base station is according to determining the downlink transmitted power budget corresponding to the extra load factor information of another base station tie point, the tie point that described another base station tie point is first base station.For instance, another tie point of described first base station and second tie point of described second base station can be corresponding to the nearby sectors of using identical downlink carrier frequency and identical downlink tone block, and described determined downlink transmitted power budget can be corresponding to another base station tie point of described first base station.In certain embodiments, described determined downlink transmitted power budget is used to comprise one group of downlink communication channel of an at least one pilot channel and a data traffic channels.In some described embodiment, the first of described determined power budget (described first is used in pilot channel through branch) is irrelevant with described first on-load factor information and the described second on-load factor information, and the second portion of described determined power budget (described second portion is equipped with corresponding to data traffic channels through branch) depends on second base station on-load factor information and the extra load factor information.For instance, corresponding to the pilot frequency channel signal of the extra tie point of first base station to broadcast with the irrelevant first predetermined transmission power level of the load state of the second on-load factor information and extra load factor information; Yet, transmit with the power level that becomes with the second on-load factor information and extra load factor information corresponding to the traffic channel signal of the extra tie point of first base station.Step 606 comprises substep 608,610,612,614 and 616.
More current first base station on-load factor information and the previously stored first base station on-load factor information in substep 608, the first base stations.Can refer to down link, for example down link load of downlink traffic channel radio link resource through on-load factor information relatively.Operation proceeds to substep 610 from substep 608.Determine the increase of relatively indicating the described first base station load, the still nothing change of reduction of substep 608 in substep 610, the first base stations.If the load of the extra tie point that is defined as first base station of step 610 increases, operation proceeds to step 612 so, increases the downlink transmitted power budget in this step the first base station.If the load that is defined as described first base station of step 610 does not have change, operate from step 610 proceeding to step 616 so, in this step, first base station does not change the downlink transmitted power budget.If the load that is defined as first base station of step 610 reduces, operation proceeds to step 614 so, reduces the downlink transmitted power budget in this step the first base station.
Fig. 7 is the Figure 100 0 that is used to illustrate the feature of various embodiments, wherein the base station in comprising the wireless communication system of a plurality of base stations receives the on-load factor information corresponding to another base station, and determines the downlink transmitted power budget according to the described base station on-load factor information that receives.Figure 100 0 comprises exemplary diagram 1002, and it comprises base station 1 1050 and the base station 2 1052 that is coupled via network link 1068.A plurality of wireless terminals (WT 1 1054, WT 2 1056, WT 3 1058, WT 4 1060) are coupled to via Radio Link in base station 1 1050.A plurality of wireless terminals (WT 1 ' 1062, WT 4 ' 1064) are coupled to via Radio Link in base station 2 1052.BS 1 1050 has calculated the on-load factor 1071 corresponding to its current downlink traffic channel load.BS 2 1052 has calculated the on-load factor 1072 corresponding to its current downlink traffic channel load.BS 2 sends the message 1074 of carrying its on-load factor 1072 via backhaul network link 1068.BS 1 1052 receives on-load factor message 1074, recovers also to compare on-load factor 1072 and himself on-load factor 1070 corresponding to the on-load factor of BS 2 1072.BS 1 determines the on-load factor 1072 of BS 2 less than himself on-load factor 1070, and therefore to set its downlink transmitted power budget be first level.Figure 100 6 explanations of Figure 100 0 are corresponding to the downlink power budget of the BS 1 of Figure 100 2 examples.In Figure 100 6, the height pointer of arrow 1010 is determined the BS 1 downlink power budget of situation less than the warp of the on-load factor of base station 1 to the on-load factor of base station 2.Downlink power budget 1010 can be divided into the first relevant with downlink 1012, the second portion 1016 of being correlated with downlink traffic channel and the third part 1014 relevant with other downlink channel.
Figure 100 0 also comprises exemplary diagram 1004, and it comprises the base station 1 1050 and base station 2 1052 that is coupled via network link 1068.A plurality of wireless terminals (WT 1 1054, WT 2 1056, WT 3 1058, WT 4 1060) are coupled to via Radio Link in base station 1 1050.At this moment, a plurality of wireless terminals (WT1 ' 1062, WT 4 ' 1064, WT 5 ' 1076, WT 2 ' 1078, WT 6 ' 1080, WT 3 ' 1082, WT 7 ' 1084) are coupled to via Radio Link in base station 2 1052.BS 1 1050 has calculated the on-load factor 1086 corresponding to its current downlink traffic channel load.BS 2 1052 has calculated the on-load factor 1088 corresponding to its current downlink traffic channel load.BS 2 sends the message 1090 of carrying its on-load factor 1088 via backhaul network link 1068.BS 1 1052 receives on-load factor message 1090, recovers also to compare on-load factor 1088 and himself on-load factor 1086 corresponding to the on-load factor 1088 of BS 2.BS 1 determines the on-load factor 1088 of BS 2 greater than himself on-load factor 1086, and therefore to set its downlink transmitted power budget be that second level, 1018, the second level are less than first level 1010.Figure 100 8 explanations of Figure 100 0 are corresponding to the BS 1 downlink power budget of Figure 100 4 examples.In Figure 100 8, the height pointer of arrow 1018 to the on-load factor of base station 2 greater than the on-load factor of base station 1 the BS 1 downlink power budget of definite situation.Downlink power budget 1018 can be divided into the first relevant with downlink 1020, the second portion 1026 of being correlated with downlink traffic channel and the third part 1024 relevant with other downlink channel.In this example, should note determining relatively that regardless of on-load factor the power level 1012,1020 that is associated with pilot channel is all identical; Yet downlink traffic channel power budget (1016,1026) is in response to from the Different Results of on-load factor comparison and change.
Fig. 8 is the Figure 110 0 that is used to illustrate the feature of various embodiments, and wherein the base station in comprising the wireless communication system of a plurality of base stations receives and determines the downlink transmitted power budget corresponding to the on-load factor information of another base station and according to the described base station on-load factor information that receives.Figure 100 0 comprises exemplary diagram 1102, and it comprises the base station 11150 and base station 2 1152 that is coupled via network link 1170.A plurality of wireless terminals (WT 1 1154, WT 2 1156, WT 3 1158, WT 4 1160) are coupled to via Radio Link in base station 1 1150.A plurality of wireless terminals (WT 1 ' 1162, WT 2 ' 1164, WT 3 ' 1166, WT 4 ' 1168) are coupled to via Radio Link in base station 2 1152.BS 1 1150 has calculated the on-load factor 1172 corresponding to its current downlink traffic channel load.BS 2 1152 has calculated the on-load factor 1174 corresponding to its current downlink traffic channel load.BS 2 sends via backhaul network link 1170 and carries its on-load factor (LF BS2(t1)) 1174 message 1176.BS 1 1150 receives on-load factor message 1176, recovers also to compare on-load factor 1174 and himself on-load factor 1172 corresponding to the on-load factor 1174 of BS 2.In this example, the on-load factor 1174 that BS 1 determines BS 2 is identical with himself on-load factor 1172, and for for the purpose of illustrating, suppose two base stations at these level equalizations, and therefore base station 1 is adjusted no longer through being set at its power budget of level 1114 also.Figure 110 8 explanations of Figure 110 0 are corresponding to the downlink power budget of the BS 1 of Figure 110 2 examples.In Figure 110 8, the height of arrow 1114 indication BS 1 downlink power budget.Downlink power budget 1114 can be divided into the first relevant with downlink 1116, the second portion 1120 of being correlated with downlink traffic channel and the third part 1118 relevant with other downlink channel.
Figure 110 0 also comprises exemplary diagram 1104, and it comprises the base station 11150 and base station 21152 that is coupled via network link 1170.A plurality of wireless terminals (WT 11154, WT 21156, WT 3 1158, WT 4 1160) are coupled to via Radio Link in base station 11150.At this moment, a plurality of wireless terminals (WT 1 ' 1162, WT 2 ' 1164, WT 3 ' 1166, WT 4 ' 1168, WT 5 ' 1178, WT 6 ' 1180, WT 7 ' 1182) are coupled to via Radio Link in base station 2 1152.BS 1 1150 has calculated the on-load factor 1172 corresponding to its current downlink traffic channel load.BS 2 1152 has calculated the on-load factor (LF corresponding to its current downlink traffic channel load BS2(t2)) 1184.BS 2 sends the message 1186 of carrying its on-load factor 1184 via backhaul network link 1170.BS 1 1150 receives on-load factor message 1186, recovers corresponding to the on-load factor 1184 of BS 2 and to on-load factor 1184 and previously stored on-load factor (LF corresponding to BS 2 BS2(t1)) 1174 compare.BS 1 determines the previous on-load factor 1174 of the present load factor 1184 of BS 2 greater than BS 2, and therefore its downlink transmitted power budget is reduced to level 1122.Figure 111 0 explanation of Figure 110 0 is corresponding to the downlink power budget of the BS 1 of Figure 110 4 examples.In Figure 110 0, the height pointer of arrow 1122 to the present load factor of base station 2 greater than the previous on-load factor of base station 2 the downlink power budget adjusted through BS 1 of definite situation.Downlink power budget 1122 can be divided into the first relevant with downlink 1124, the second portion 1128 of being correlated with downlink traffic channel and the third part 1126 relevant with other downlink channel.In this example, should notice relatively determining that the power level 1116,1124 relevant with pilot channel is all identical regardless of on-load factor; Yet downlink traffic channel budget (1120,1128) changes in response to the Different Results of relatively following the trail of from on-load factor.
Figure 110 0 also comprises exemplary diagram 1106, and it comprises the base station 1 1150 and base station 2 1152 that is coupled via network link 1170.A plurality of wireless terminals (WT 1 1154, WT 2 1156, WT 3 1158, WT 4 1160) are coupled to via Radio Link in base station 1 1150.At this moment, a plurality of wireless terminals (WT 1 ' 1162, WT 4 ' 1168) are coupled to via Radio Link in base station 2 1152.BS 1 1150 has calculated the on-load factor 1172 corresponding to its current downlink traffic channel load.BS 2 1152 has calculated the on-load factor (LF corresponding to its current downlink traffic channel load BS2(t3)) 1188.BS 2 sends the message 1190 of carrying its on-load factor 1188 via backhaul network link 1170.BS 1 1150 receives on-load factor message 1190, recovers corresponding to the on-load factor 1188 of BS 2 and to on-load factor 1188 and previously stored on-load factor (LF corresponding to BS 2 BS2(t2)) 1184 compare.BS 1 determines the previous on-load factor 1184 of the present load factor 1188 of BS 2 less than BS 2, and therefore level 1130 is arrived in its downlink transmitted power increase of budget.Figure 111 2 explanations of Figure 110 0 are corresponding to the downlink power budget of the BS 1 of Figure 110 6 examples.In Figure 111 2, the height pointer of arrow 1130 to the present load factor of base station 2 less than the previous on-load factor of base station 2 the downlink power budget adjusted through BS 1 of definite situation.Downlink power budget 1130 can be divided into the first relevant with downlink 1132, the second portion 1136 of being correlated with downlink traffic channel and the third part 1134 relevant with other downlink channel.In this example, should note determining relatively that regardless of on-load factor power level 1124,1132 homogeneous phases relevant with pilot channel are same; Yet downlink traffic channel power budget (1128,1136) changes in response to the Different Results of relatively following the trail of from on-load factor.
Fig. 9 is the Figure 120 0 that is used to illustrate the feature of various embodiments, and wherein the base station in comprising the wireless communication system of a plurality of base stations receives and determines the downlink transmitted power budget corresponding to the on-load factor information of another base station and according to base station on-load factor information.Figure 120 0 comprises exemplary diagram 1202, and it comprises the base station 1 1250 and base station 2 1252 that is coupled via network link 1270.A plurality of wireless terminals (WT 1 1254, WT 2 1256, WT 3 1258, WT 4 1260) are coupled to via Radio Link in base station 1 1250.A plurality of wireless terminals (WT 1 ' 1262, WT 2 ' 1264, WT 3 ' 1266, WT4 ' 1268) are coupled to via Radio Link in base station 2 1252.BS 1 1250 has calculated the on-load factor (LF corresponding to its current downlink traffic channel load BS1(t1)) 1272.BS 2 1252 has calculated the on-load factor 1274 corresponding to its current downlink traffic channel load.BS 2 sends via backhaul network link 1270 and carries its on-load factor (LF BS2) 1274 message 1276.BS 1 1250 receives on-load factor message 1276, recovers to compare corresponding to the on-load factor 1274 of BS 2 and to on-load factor 1274 and himself on-load factor 1272.In this example, the on-load factor 1274 that BS 1 determines BS 2 is identical with himself on-load factor 1272, and for for the purpose of illustrating, will suppose two base stations at these level equalizations, and so base station 1 no longer adjust through being set at its power budget of level 1214.Figure 120 8 explanations of Figure 120 0 are corresponding to the BS 1 downlink power budget of Figure 120 2 examples.In Figure 120 8, the height of arrow 1214 indication BS 1 downlink power budget.Downlink power budget 1214 can be divided into the first relevant with downlink 1216, the second portion 1220 of being correlated with downlink traffic channel and the third part 1218 relevant with other downlink channel.
Figure 120 0 also comprises exemplary diagram 1204, and it comprises the base station 1 1250 and base station 2 1252 that is coupled via network link 1270.At this moment, a plurality of wireless terminals (WT 1 1254, WT 2 1256, WT 3 1258, WT 4 1260, WT 5 1278, WT 6 1280, WT 7 1282) are coupled to via Radio Link in base station 1 1250.At this moment, a plurality of wireless terminals (WT 1 ' 1262, WT 2 ' 1264, WT 3 ' 1266, WT4 ' 1268) are coupled to via Radio Link in base station 2 1252.BS 1 1250 has calculated the on-load factor (LF corresponding to its current downlink traffic channel load BS1(t2)) 1272.BS 2 1252 has calculated the on-load factor (LF corresponding to its current downlink traffic channel load BS2) 1274.BS 2 sends the message 1276 of carrying its on-load factor 1274 via backhaul network link 1270.BS 1 1250 receives on-load factor message 1276, recovers corresponding to the on-load factor 1274 of BS 2 and recognizes that the on-load factor corresponding to BS 2 remains unchanged.BS 1 1250 is to its present load factor 1284 and previously stored on-load factor (LF corresponding to BS 1 BS1(t1)) 1272 compare.BS 1 determines the previous on-load factor 1272 of the present load factor 1284 of BS 1 greater than BS 1, and therefore level 1222 is arrived in its downlink transmitted power increase of budget.Figure 121 0 explanation of Figure 120 0 is corresponding to the downlink power budget of the BS 1 of Figure 120 4 examples.In Figure 121 0, the height pointer of arrow 1222 to the present load factor of base station 1 greater than the previous on-load factor of base station 1 the downlink power budget adjusted through BS 1 of definite situation.Downlink power budget 1222 can be divided into the first relevant with downlink 1224, the second portion 1228 of being correlated with downlink traffic channel and the third part 1226 relevant with other downlink channel.In this example, should notice relatively determining that the power level 1216,1224 relevant with pilot channel is all identical regardless of on-load factor; Yet downlink traffic channel power budget (1220,1228) is in response to from the Different Results of on-load factor comparison and change.
Figure 120 0 also comprises exemplary diagram 1206, and it comprises the base station 1 1250 and base station 2 1252 that is coupled via network link 1270.At this moment, a plurality of wireless terminals (WT 3 1258, WT 4 1260) are coupled to via Radio Link in base station 1 1250.At this moment, a plurality of wireless terminals (WT 1 ' 1262, WT2 ' 1264, WT 3 ' 1266, WT 4 ' 1268) are coupled to via Radio Link in base station 2 1252.BS 1 1250 has calculated the on-load factor (LF corresponding to its current downlink traffic channel load BS1(t3) 1286.BS 2 1252 has calculated the on-load factor (LF corresponding to its current downlink traffic channel load BS2) 1274.BS 2 sends the message 1276 of carrying its on-load factor 1274 via backhaul network link 1270.BS 1 1250 receives on-load factor message 1276, recovers corresponding to the on-load factor 1274 of BS 2 and recognizes that the on-load factor corresponding to BS 2 remains unchanged.BS 1 is to its present load factor 1286 and previously stored on-load factor (LF corresponding to BS 1 BS1(t2)) 1284 compare.BS 1 determines the previous on-load factor 1284 of the present load factor 1286 of BS 1 less than BS 1, and therefore its downlink transmitted power budget is reduced to level 1230.Figure 121 2 explanations of Figure 120 0 are corresponding to the BS 1 downlink power budget of Figure 120 6 examples.In Figure 121 2, the height pointer of arrow 1230 to the present load factor of base station 1 less than the previous on-load factor of base station 1 the downlink power budget adjusted through BS 1 of definite situation.Downlink power budget 1230 can be divided into the first relevant with downlink 1232, the second portion 1236 of being correlated with downlink traffic channel and the third part 1234 relevant with other downlink channel.In this example, should notice relatively determining that the power level 1224,1232 relevant with pilot channel is all identical regardless of on-load factor; Yet downlink traffic channel power budget (1228,1236) is in response to from the Different Results of on-load factor comparison and change.
The Figure 10 that comprises the combination of Figure 10 A and Figure 10 B is the figure according to the flow chart 2000 of the exemplary method of various embodiments operation base station.This exemplary base station (for example, the base station 200 of Fig. 2) can be the base station in the multi-address radio communication system that comprises a plurality of base stations, and each base station comprises at least one base station tie point.Operation starts from step 2002, is energized in this step base station and initialization.Operation proceeds to step 2004, step 2010, step 2020 and step 2034 from beginning step 2002 via connected node A 2032.
In step 2004, it is carried out on round-robin basis, and the down link load of each base station tie point is determined in the base station.Step 2004 be output as base station 1 down link on-load factor 2006 ..., base station 1 tie point n down link on-load factor 2008.Information (2006 ..., 2008) be step 2020 and the input of step 2034.
In step 2010, the base station receives the down link on-load factor information corresponding to other base stations (for example, neighbor base station).Described reception can be via to the interface of backhaul network and/or via wireless receiver, for example, and by being connected to the wireless terminal that described base station and another base station are used as repeater simultaneously.Described reception can be in response to request and/or in response to passing on the decision of its down link load information by another base station and carrying out on round-robin basis.Corresponding to the information of the multiple tie point of one or more base stations be step 2010 output (base station 2 tie points, 1 down link on-load factor 2012 ..., base station 2 tie point m down link on-load factors 2014 ..., base station N tie point 1 down link on-load factor 2016 ..., base station N tie point p down link on-load factor 2018).Information (2012,2014,2016,2018) is the input of step 2020.
In each the tie point execution in step 2020 that continues on the basis of carrying out at the base station.In step 2020, the base station is according to determining the downlink transmitted power budget corresponding to the on-load factor information of other one or more base stations (for example neighbor base station).In certain embodiments, downlink transmitted power budget through determining is the power budget that comprises one group of downlink communication channel of an at least one pilot channel and a data channel, and pilot channel transmission power level (for example power of the every tone of pilot channel) and load information are irrelevant, and the downlink power budget through determining depend in part on the load of one or more neighbor points of the load information of the pairing base station of described budget tie point and one or more neighbor base stations corresponding to Traffic Channel described.Step 2020 comprises substep 2022,2024,2026 and 2028.At substep 2022, the present load of the base station tie point of being considered and the load of one or more tie points of one or more neighbor base stations that can disturb the tie point of being considered are compared in the base station.At substep 2024, the previous load of the present load of the base station tie point that the base station is relatively considered and the base station tie point of being considered.At substep 2026, the previous load of the present load of the neighbor base station tie point of the more potential interference in base station and the neighbor base station tie point of same potential interference.Can carry out substep 2026 at the neighbor base station tie point of a plurality of different potential interference.
Operation proceeds to substep 2028 from substep 2022,2024 and 2026.At substep 2028, the base station is according to the comparative result of the load of one or more tie points of the load of in time change of in time change of base station tie point load, the load of neighbor base station tie point, the base station tie point considered and neighbor base station, current downlink transmitted power budget, previous downlink transmitted power budget and substitutingly may the downlink transmitted power budget adjust base station tie point downlink transmitted power budget.Substep 2028 comprises substep 2030.At substep 2030, base station tie point downlink traffic channel power budget is adjusted in the base station.
In certain embodiments, the power budget of determining a base station tie point comprises: when the load of the tie point of relatively indicating other base stations (for example neighbor base station) during greater than the load of the applied base station of described budget tie point, determine first value of described power budget corresponding to the described budget of indication; And when described load of relatively indicating other base stations (for example neighbor base station) during less than the load of the applied base station of described budget tie point, determine described power budget corresponding to indication greater than second value by the power budget of the indicated power budget of described first value.
In various embodiments, the power budget of determining the base station tie point comprises that the increase in response to the load of the tie point that detects other base stations (for example neighbor base station) reduces the current power budget.In certain embodiments, the power budget of determining the base station tie point comprises that the reduction in response to the tie point load that detects other base stations (for example neighbor base station) increases the current power budget.
In various embodiments, the power budget of determining the base station tie point comprises in response to the increase that detects described tie point load increases the current power budget.In certain embodiments, the power budget of determining the base station tie point comprises in response to the reduction that detects described tie point load and reduces the current power budget.
In certain embodiments, for a tie point, the support of described base station is a plurality of (for example, two, more than three or three) the substituting level of scheduled downlink through-put power budget, and for a preset time of described tie point, one in the substituting level of the described possibility of described base station selected use.Therefore, the base station can change the load of neighbor base station (comprise change) in response to load and dynamically change its power budget between possible substituting.In certain embodiments, the base station can be passed on the information of its selected downlink transmitted power budget level of identification to other base stations (for example neighbor base station).
In step 2034, the base station produces the message of carrying base station tie point down link load information.Base station tie point load information (BS 1 tie point 1 down link on-load factor 2006 ..., base station 1 tie point n down link on-load factor 2008) be the output of step 2034.Operation proceeds to step 2036 from step 2034.In step 2036, the message that base station transmits step 2034 is produced comprises the definite base station tie point on-load factor information of warp that is directed to other one or more base stations (for example neighbor base station).The transmission that is directed to neighbor base station can be via to the interface of backhaul network and/or via the wireless terminal that is coupled to described base station and described neighbor base station.Step 2034 and 2036 operation in response to from the request of neighbor base station and/or based on the base station pass on its load information to one or more neighbor base stations decision and carry out on the basis of carrying out continuing, for example as the part of circulation timing architecture.In certain embodiments, the down link on-load factor of one in the tie point of described base station determines that in response to the base station its load has arrived a high level and/or has been communicated to one or more selected neighbor base stations in response to the load that is detected changes (change of a scheduled volume).
Though be described under the situation of ofdm system, the method and apparatus of various embodiments can be applicable to the communication system of relative broad range, and it comprises many non-OFDM and/or non-cellular system.
In various embodiments, node as herein described uses one or more modules to implement to carry out the step corresponding to one or more methods, and for example, signal processing, beacon generation, beacon detection, beacon are measured, connected relatively, connection enforcement.In certain embodiments, use module to implement various features.Described module can use the combination of software, hardware or software and hardware to implement.Many said methods or method step can use and for example be included in machine-readable medium (storage arrangement for example, for example RAM, floppy disc etc.) in the machine-executable instruction of software implement, thereby control a machine (for example having or do not have the all-purpose computer of additional hardware), thereby implement all or part said method at (for example) one or more intranodals.Therefore, various embodiments is aimed at and comprises machine-executable instruction so that machine (for example processor and related hardware) is carried out the machine-readable medium of one or more steps of said method.
In view of above describing, will be apparent to the numerous extra variation of method and apparatus mentioned above to the those skilled in the art.Described variation is considered to be covered by in the scope.The method and apparatus of various embodiments (and in various embodiments) can be with CDMA, Orthodoxy Frequency Division Multiplex (OFDM) and/or be can be used for providing the communication technology of the multiple other types of the wireless communication link between access node and the mobile node to use.In certain embodiments, access node is through being embodied as the base station, and it uses the communication link of OFDM and/or CDMA foundation and mobile node.In various embodiments, mobile node is through being embodied as mobile computer, personal digital assistant (PDA) or other portable devices that comprises receiver/transmitter circuit and logic and/or routine to implement the method for various embodiments.

Claims (35)

  1. One kind in comprising the multi-address radio communication system of a plurality of base stations the operation first base station method, each in described a plurality of base stations comprises at least one base station tie point, described method comprises:
    Receive the second base station on-load factor information of indication corresponding to the second base station tie point load of second base station; And
    Determine the downlink transmitted power budget according to the described second base station on-load factor information that receives.
  2. 2. method according to claim 1 is wherein further determined the downlink transmitted power budget according to carrying out corresponding to the extra load factor information of another base station tie point.
  3. 3. method according to claim 2,
    Wherein said another base station tie point is corresponding to described first base station, and
    Wherein said definite downlink transmitted power the budget includes more described extra load factor information and described second base station on-load factor information.
  4. 4. method according to claim 2, the downlink transmitted power budget that wherein said warp is determined is the power budget that comprises one group of downlink communication channel of an at least one pilot channel and a data traffic channels; And
    The part of the downlink transmitted power budget that the described warp of wherein said pilot channel is determined is irrelevant with described extra load factor information and the described second on-load factor information, and wherein depends on described second base station on-load factor information and described extra load factor information corresponding to the part of the definite downlink transmitted power budget of the described warp of described data traffic channels.
  5. 5. method according to claim 3, determine that wherein described power budget comprises:
    When relatively indicating the described second base station load, determine first value of described power budget when described corresponding to the described budget of indication greater than the described first base station load; And
    When described when relatively indicating the described second base station load less than the described first base station load, determine described power budget corresponding to indication greater than second value by the power budget of the indicated described power budget of described first value.
  6. 6. method according to claim 2, determine that wherein described power budget comprises:
    Increase in response to the load that detects described second base station reduces the current power budget.
  7. 7. method according to claim 2, determine that wherein described power budget comprises:
    Reduction in response to the load that detects described second base station increases the current power budget.
  8. 8. method according to claim 2, determine that wherein described power budget comprises:
    Increase in response to the load that detects described first base station increases the current power budget.
  9. 9. method according to claim 2, determine that wherein described power budget comprises:
    Reduction in response to the load that detects described first base station reduces the current power budget.
  10. 10. base station, it comprises:
    Be used to receive the device of indication corresponding to the base station on-load factor information of the load of the base station tie point of another base station; And
    Be used for determining the device of downlink transmitted power budget, the wherein said device that is used for definite downlink transmitted power budget is determined described downlink transmitted power budget according to the described base station on-load factor information that receives.
  11. 11. base station according to claim 10, the wherein said device of definite downlink transmitted power budget that is used for is according to determining described downlink transmitted power budget corresponding to the extra load factor information of additional base stations tie point.
  12. 12. base station according to claim 11,
    Wherein said additional base stations tie point is corresponding to described base station, and
    The wherein said device that is used for definite downlink transmitted power budget comprises the device that is used for more described extra load factor information and described other base station on-load factor information.
  13. 13. base station according to claim 11, the downlink transmitted power budget that wherein said warp is determined is the power budget that comprises one group of downlink communication channel of an at least one pilot channel and a data traffic channels; And
    The part of the power budget that the described warp of wherein said pilot channel is determined is irrelevant with described other on-load factor information and described extra load factor information, and wherein depends on described other base station on-load factor information and described extra load factor information corresponding to the part of the definite downlink transmitted power budget of the described warp of described data traffic channels.
  14. 14. base station according to claim 12, the wherein said device that is used for determining the downlink transmitted power budget when relatively indicating described other base station loads greater than the load of described base station, determines that described downlink transmitted power budget is corresponding to first value of indicating described budget when described; And when described when relatively indicating described other base station loads less than the load of described base station, determine described downlink transmitted power budget corresponding to indication greater than second value by the power budget of the indicated described power budget of described first value.
  15. 15. base station according to claim 11, the wherein said device that is used for determining the downlink transmitted power budget reduces the current power budget in response to the increase of the load that detects described other base stations.
  16. 16. base station according to claim 11, the wherein said device that is used for determining the downlink transmitted power budget increases the current power budget in response to the reduction of the load that detects described second base station.
  17. 17. base station according to claim 11, the wherein said device that is used for determining the downlink transmitted power budget comprises the device that the load that is used to follow the trail of described base station changes, and the wherein said device that is used for determining the downlink transmitted power budget increases the current power budget in response to the increase of the load that detects described base station.
  18. 18. base station according to claim 11, the wherein said device that is used for determining the downlink transmitted power budget comprises the device that the load that is used to follow the trail of described base station changes, and the wherein said device that is used for determining the downlink transmitted power budget reduces the current power budget in response to the reduction of the load that detects described base station.
  19. 19. a base station, it comprises:
    Interface, it is used to receive the signal of reception and registration indication corresponding to the base station on-load factor information of the load of at least one base station tie point of at least one other base station;
    On-load factor information is recovered module, and it is used for from the on-load factor information of the described signal recovery that receives corresponding at least one other base station;
    Downlink transmitted power budget determination module, wherein said downlink transmitted power budget determination module is according to the described downlink transmitted power budget of determining the tie point of described base station through the on-load factor information of recovering corresponding at least one other base station.
  20. 20. base station according to claim 19, it further comprises:
    The on-load factor determination module, it is used for determining the on-load factor corresponding to the tie point of described base station;
    The on-load factor comparison module, it is used for on-load factor that comparison determines corresponding to the described warp of the tie point of described base station and the on-load factor through recovering corresponding to the tie point of another base station, and wherein said downlink transmitted power budget determination module uses the result of described on-load factor comparison module to determine described downlink power budget.
  21. 21. base station according to claim 19, the power budget that wherein said warp is determined is the power budget that comprises one group of downlink communication channel of an at least one pilot channel and a data traffic channels; And
    The part of the power budget that the described warp of wherein said pilot channel is determined has nothing to do with described other on-load factor information and described extra load factor information, and wherein depends on described other base station on-load factor information and described extra load factor information corresponding to the part of the described power budget of described data traffic channels.
  22. 22. base station according to claim 21, when wherein said downlink transmitted power budget determination module is determined described other base station loads greater than the load of described base station when described on-load factor comparison module, determine first value of described power budget corresponding to the described budget of indication; And when described other base station loads of described on-load factor comparison module indication during less than the load of described base station, determine described power budget corresponding to indication greater than second value by the power budget of the indicated described power budget of described first value.
  23. 23. base station according to claim 21, it further comprises:
    The on-load factor tracing module, it is used to follow the trail of the change of the on-load factor of base station tie point, and wherein said downlink transmitted power budget determination module reduces the current power budget in response to the increase of the load that detects one in described other base stations.
  24. 24. base station according to claim 21, it further comprises:
    The on-load factor tracing module, it is used to follow the trail of the change of the on-load factor of base station tie point, and wherein said downlink transmitted power budget determination module increases the current power budget in response to the reduction of the load that detects one in described other base stations.
  25. 25. base station according to claim 21, it further comprises:
    The on-load factor tracing module, it is used to follow the trail of the change of the on-load factor of base station tie point, and wherein said downlink transmitted power budget determination module increases the current power budget in response to the increase of the load of the tie point that detects described base station.
  26. 26. base station according to claim 21, it further comprises:
    The on-load factor tracing module, it is used to follow the trail of the change of the on-load factor of base station tie point, and wherein said downlink transmitted power budget determination module reduces the current power budget in response to the reduction of the load of the tie point that detects described base station.
  27. 27. a computer-readable media, it comprises and is used for controlling the machine-executable instruction that a method is implemented in first base station at the multi-address radio communication system that comprises a plurality of base stations, and described method comprises:
    Receive the second base station on-load factor information of indication corresponding to the load of the second base station tie point of second base station; And
    Determine the downlink transmitted power budget according to the described second base station on-load factor information that receives.
  28. 28. computer-readable media according to claim 27, it further comprises machine-executable instruction and determines described downlink transmitted power budget with basis corresponding to the extra load factor information of another base station tie point.
  29. 29. computer-readable media according to claim 28, wherein said another base station tie point is corresponding to described first base station.
  30. 30. computer-readable media according to claim 29, its further comprise machine-executable instruction with:
    Compare extra load factor information and the described second base station on-load factor information, as a part of determining described downlink transmitted power budget.
  31. 31. computer-readable media according to claim 30, the downlink transmitted power budget that wherein said warp is determined is the power budget that comprises one group of downlink communication channel of an at least one pilot channel and a data traffic channels; And
    The part of the downlink transmitted power budget that the described warp of wherein said pilot channel is determined is irrelevant with described extra load factor information and the described second on-load factor information, and wherein depends on described second base station on-load factor information and described extra load factor information corresponding to the part of the definite downlink transmitted power budget of the described warp of described data traffic channels.
  32. 32. the base station that can operate in communication system, described base station comprises:
    Processor, it is configured to:
    Receive the second base station on-load factor information of indication corresponding to the load of the second base station tie point of second base station; And
    Determine the downlink transmitted power budget according to the described second base station on-load factor information that receives.
  33. 33. base station according to claim 32, wherein said processor further is configured to:
    Determine described downlink transmitted power budget according to extra load factor information corresponding to another base station tie point.
  34. 34. base station according to claim 33,
    Wherein said another base station tie point is corresponding to described first base station, and
    Wherein said processor further is configured to determine described downlink transmitted power budget by the operation that comprises comparison extra load factor information and the described second base station on-load factor information.
  35. 35. base station according to claim 34, the downlink transmitted power budget that wherein said warp is determined is the power budget that comprises one group of downlink communication channel of an at least one pilot channel and a data traffic channels; And
    The part of the downlink transmitted power budget that the described warp of wherein said pilot channel is determined is irrelevant with described extra load factor information and the described second on-load factor information, and wherein depends on described second base station on-load factor information and described extra load factor information corresponding to the part of the definite downlink transmitted power budget of the described warp of described data traffic channels.
CN200680045781XA 2005-10-14 2006-10-16 Methods and apparatus for controlling a base station's transmission power Active CN101322326B (en)

Applications Claiming Priority (9)

Application Number Priority Date Filing Date Title
US11/251,069 2005-10-14
US11/251,069 US8514692B2 (en) 2003-02-24 2005-10-14 Methods and apparatus for determining, communicating and using information which can be used for interference control purposes
US11/302,729 2005-12-14
US11/302,729 US20060092881A1 (en) 2004-10-14 2005-12-14 Methods and apparatus for determining, communicating and using information which can be used for interference control purposes
US11/487,017 2006-07-14
US11/486,714 US9191840B2 (en) 2005-10-14 2006-07-14 Methods and apparatus for determining, communicating and using information which can be used for interference control
US11/487,017 US8503938B2 (en) 2004-10-14 2006-07-14 Methods and apparatus for determining, communicating and using information including loading factors which can be used for interference control purposes
US11/486,714 2006-07-14
PCT/US2006/040543 WO2007047670A1 (en) 2005-10-14 2006-10-16 Methods and apparatus for controlling a base station's transmission power

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