CN101421939A - Methods and apparatus for tracking wireless terminal power information - Google Patents

Methods and apparatus for tracking wireless terminal power information Download PDF

Info

Publication number
CN101421939A
CN101421939A CNA2007800130554A CN200780013055A CN101421939A CN 101421939 A CN101421939 A CN 101421939A CN A2007800130554 A CNA2007800130554 A CN A2007800130554A CN 200780013055 A CN200780013055 A CN 200780013055A CN 101421939 A CN101421939 A CN 101421939A
Authority
CN
China
Prior art keywords
power
wireless terminal
base station
signal
information
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CNA2007800130554A
Other languages
Chinese (zh)
Inventor
阿纳博·达什
桑迪普·兰冈
扎梅尔·切莱比
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qualcomm Inc
Original Assignee
Qualcomm Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Publication of CN101421939A publication Critical patent/CN101421939A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Mobile Radio Communication Systems (AREA)

Abstract

Power control reports are communicated less frequently than the power control commands. The base station tracks the commands sent to the wireless terminal and estimates the wireless terminal's control channel transmit power. Received power control channel reports are utilized to compare the base station's estimated wireless terminal control channel transmit power to the actual wireless terminal control channel transmit power. An estimate of the error rate of transmitted power control signals is generated based using the tracked power command information and received power report information. Adjustments are performed in the power control command signaling to compensate for estimated error rates.

Description

The method and apparatus that is used for tracking wireless terminal power information
Related application
Please case in this advocate the 60/792nd of being entitled as of application on April 14th, 2006 " method and apparatus (Methods and Apparatus for Tracking Wireless Terminal Power Information) that is used for tracking wireless terminal power information ", the rights and interests of No. 253 U.S. Provisional Patent Application cases, described temporary patent application case clearly is incorporated herein by reference.
Technical field
The present invention relates to wireless communication system, and more particularly, relate to the base station and use the method and apparatus of following the tracks of wireless terminal through-put power relevant information.
Background technology
Power control command will be issued with two-forty usually in base station (its transmitter of controlling wireless terminal for power is to realize the closed loop of target institute received power at the place, base station), and common with the transmission power information of much lower rate reports from wireless terminal.From the transmission power information of wireless terminal this frequently report can cause the base station to over-evaluate or underestimate the available horsepower that the wireless terminal place is used for transfer of data.The relatively poor estimation of available horsepower information can cause the poor efficiency speed of the transfer of data that wireless terminal carries out.
In view of foregoing, need to improve the additional method and the equipment of the estimation of the base station can be used for transfer of data to the wireless terminal place power.Provide the base station to institute's transmitted power order understanding and the method and apparatus of the follow-up control between the wireless terminal understanding of moving to institute's received power control command and according to power control command be useful.Also allowing modeling, estimation and/or order rectification building-out also is useful with the method and apparatus of realizing the preferable level that the wireless terminal through-put power is controlled.
Summary of the invention
The base station is transferred to wireless terminal with the adjustment of order to the through-put power of the control channel of wireless terminal with power control command (for example, increment/decrement order).These orders are issued by the base station so that institute's received power level that the control control channel is located in the base station.Some power control commands are received, successfully recover and implemented by wireless terminal.Yet some institute's transmission power control commands are not received, and other received signal may be by wireless terminal decipher improperly, for example owing to destroy the additional noise of signal.In addition, the channel condition between wireless terminal and the base station may (being under the situation of mobile node at wireless terminal especially for example) change.Wireless terminal is sent to the base station with through-put power report, through-put power report indication control channel at a time between the through-put power of point, described time point (for example) relates to the beginning of the communication section that reports back.The transmitted frequency of through-put power report is less than the transmitted frequency of power control command.Base station tracks sends to the order of wireless terminal, and estimates the control channel through-put power of the wireless terminal between the continuous wireless terminal through-put power report.Utilizing institute's through-put power that receives to report compares with estimated wireless terminal control channel through-put power and actual wireless terminal control channel through-put power with the base station.
The estimation of using the institute's power command information of following the tracks of and the transmission power information that receives to produce the error rate of institute's transmission power control signal.Then the estimated wireless terminal control channel through-put power and/or the power control command signaling of base station are adjusted to compensate estimated error rate.
Though in the foregoing invention content, discussed various embodiment, should be appreciated that, there is no need all embodiment and include identical feature, and in the above-mentioned feature some are not to be essential, but it can be required in certain embodiments.To in following embodiment, discuss numerous additional features, embodiment and the benefit of various embodiment.
Description of drawings
Fig. 1 is the figure according to the example communications system of various embodiment enforcements.
Fig. 2 is the figure according to the exemplary base station (for example, access node) of various embodiment enforcements.
Fig. 3 is the figure according to the exemplary wireless terminal (for example, mobile node) of various embodiment enforcements.
Fig. 4 is the picture group that explanation is followed the tracks of according to exemplary signaling and the wireless terminal power of various embodiment.
Fig. 5 is a flow chart of operating the exemplary method of base station according to various embodiment.
Fig. 6 is the figure that transfers the exemplary recursive structure that uses in the control channel operator scheme of form special use at exemplary whole tone.
Fig. 7 is the figure that separates the exemplary recursive structure that uses in the control channel operator scheme of form special use at exemplary tone.
Fig. 8 is the figure that is used for the exemplary format of exemplary 5 wireless terminal through-put power rollbacks report.
Fig. 9 is the figure that is used for the exemplary format of exemplary 4 wireless terminal through-put power rollbacks report.
Figure 10 is the figure that the exemplary power control signaling between base station and the wireless terminal is described according to various embodiment, and the explanation feature of some embodiments.
Embodiment
Fig. 1 shows the example communications system of implementing according to various embodiment 100.Example communications system 100 comprises a plurality of sub-districts: sub-district 1 102, sub-district M 104.Example system 100 is (for example) exemplary multiple access Orthodoxy Frequency Division Multiplex (OFDM) wireless communication system, for example comprises the multiple access OFDM spread spectrum system that tone jumps.Each sub-district 102,104 of example system 100 comprises three sectors.According to various embodiment, be not further divided into the sub-district (N=1) of a plurality of sectors, the sub-district (N〉3) that has the sub-district (N=2) of two sectors and have 3 above sectors also is possible.One or more carrier waves and/or downlink tone block are supported in each sector.Each downlink tone block has corresponding uplink tone block.In certain embodiments, at least some sectors support that three downlink/uplink tone blocks are right.For the base station, right each combination of sector and tone blocks is corresponding to different base station section attachment point.Sub-district 1 102 comprises first sector (sector 1 110), second sector (sector 2 112) and the 3rd sector (sector 3 114).Similarly, sub-district M 104 comprises first sector (sector 1 122), second sector (sector 2 124) and the 3rd sector (sector 3 126).Sub-district 1 102 comprises base station (BS), base station 1106 and a plurality of wireless terminal (WT) in each sector 110,112,114.Sector 1 110 comprises WT (1) 136 and the WT (N) 138 that is coupled to BS 1 106 respectively via Radio Link 140,142; Sector 2 112 comprises WT (1 ') 144 and the WT (N ') 146 that is coupled to BS 1 106 respectively via Radio Link 148,150; Sector 3 114 comprises WT (1 ＂) 152 and the WT (N ＂) 154 that is coupled to BS 1 106 respectively via Radio Link 156,158.Similarly, sub-district M 104 comprises base station M 108 and a plurality of wireless terminal (WT) in each sector 122,124,126.Sector 1 122 comprises WT (1 ＂ ＂) 168 and the WT (N ＂ ＂) 170 that is coupled to BS M 108 respectively via Radio Link 180,182; Sector 2 124 comprises WT (1 ＂ ＂ ') 172 and the WT (N ＂ ＂ ') 174 that is coupled to BS M 108 respectively via Radio Link 184,186; Sector 3126 comprises WT (1 ＂ ＂ ') 176 and the WT (N ＂ ＂ ') 178 that is coupled to BS M 108 respectively via Radio Link 188,190.
System 100 also comprises the network node 160 that is coupled to BS 1 106 and BS M 108 respectively via network link 162,164.Network node 160 also is coupled to other network node via network link 166, for example other base station, aaa server node, intermediate node, router etc. and internet.Network link 162,164,166 can be (for example) fiber optic cables.Each wireless terminal (for example, WT 1 136) comprises transmitter and receiver.At least some wireless terminals (for example, WT (1) 136) are the removable mobile node that passes system 100, and can (for example) use the base station section attachment point via the base station communication in Radio Link and the WT present located sub-district.Wireless terminal (WT) (for example, WT (1) 136) can be communicated by letter with peer node (for example, other WT in the system 100 or system 100 outsides) via base station (for example, BS 106 and/or network node 160).WT (for example, WT (1) 136) can be mobile communications device, for example mobile phone, have radio modem personal digital assistant, have radio modem laptop computer, have data terminal of radio modem or the like.
Fig. 2 is the figure according to the exemplary base station 200 of various embodiment enforcements.Exemplary base station 200 can be any one in the base station (106,108) of the example system 100 of Fig. 1.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, various elements can be on bus 212 interchange of data and information.Memory 210 comprises routine 218 and data/information 220.(for example, CPU) executive routine 218, and the data/information 220 in the use memory 210 is controlled the operation and the implementation method of base station 200 for processor 206.
Receiver module 202 (for example, the OFDM receiver) is coupled to reception antenna 203, the uplink signal that base station 200 receives from wireless terminal via reception antenna 203.Institute's receiving uplink signal comprises user data signal and the Dedicated Control Channel signal of passing on a plurality of dissimilar up-link informations to report.During a plurality of dissimilar up links are reported one is the report of wireless terminal through-put power rollback.The power information that receiver module 202 receives from wireless terminal, described power information indication is exclusively used in the quantity of power that predetermined group signal is transferred to base station 200.Receiver module 202 comprises decoder 214, its decoding before transmission by in institute's receiving uplink signal of wireless terminal coding at least some.
Transmitter module 204 (for example, the OFDM transmitter) is coupled to transmit antenna 205, and base station 200 is arrived wireless terminal via transmit antenna 205 with downlink signal transmissions.Down link signal comprises beacon signal, pilot signal, user data signal and various control signal.Control signal comprises and is directed to the command signal of indivedual wireless terminals with the transmission power level that changes wireless terminal that for example, command signal is used as the part of closed power control embodiment.Transmitter module 204 is transferred to wireless terminal with power control signal via wireless communication link in one period.
In various embodiments, for the given wireless terminal that uses base station 200 attachment point, the base station is with first rate received power information signal (for example, Dedicated Control Channel through-put power rollback report), and with the second speed rates power control signal faster than first rate.In some these type of embodiment, second speed is at least 20 times of first rate.Fig. 4 and Figure 10 explanation are reported transmission power information to two examples of base station with the speed slower than the speed that command-control signal is sent to wireless terminal from the base station from wireless terminal.
I/O interface 208 is coupled to internet and/or other network node with base station 200, for example other base station, router, AAA node, home agent node or the like.Therefore, I/O interface 208 allows the wireless terminal participation of the network attachment point of use base station 200 to be attached to the communication session of the peer node (for example another wireless terminal) of network with using different base station by making base station 200 be coupled to backhaul network (it is coupled to other base station).
Routine 218 comprises communication routines 222 and base stations control routine 224.Communication routines 222 is implemented base station 200 employed various communication protocols.Base stations control routine 224 comprises scheduler module 226, communication delay determination module 227, wireless terminal institute received power measurement module 228, wireless terminal through-put power command module 230, wireless terminal power order tracking module 232, wireless terminal rollback report processing module 234, comparison module 236, power estimation module 237, error rate estimation module 238, adjusting module 240, peak transfer rate determination module 241.The up link and the downlink air link circuit resource of scheduler module 226 (for example, scheduler program) scheduling wireless terminal.
Wireless terminal institute received power measurement module 228 uses base stations 200 attachment point to measure institute's received power from the Dedicated Control Channel signal of wireless terminal, thereby for example obtains to measure at each a plurality of institutes received power that carry out in the wireless terminal of closed power control base station 200.The institute received power measures 1272 ..., the measurement of the wireless terminal institute received power measurement module 228 that is associated with wireless terminal 1 of institute's received power measuring N 274 expressions.
Wireless terminal through-put power command module 230 produces the through-put power order of being carried out the wireless terminal of power control by base station 200 that is passed to be passed, for example instructs indivedual wireless terminals (order will be directed into described wireless terminal) to increase or reduce the order of the transmission power level of its up link Dedicated Control Channel signaling.In various embodiments, (for example) is in order to reduce overhead and/or owing to consider two-way time, not use confirmation signal in response to wireless terminal through-put power command signaling.Wireless terminal through-put power command module 230 in time determines to treat the power control signal in the specified point transmission according to the mass measurement of received signal and desired received signal quality level.In certain embodiments, carry out the measurement of received signal by wireless terminal institute received power measurement module 228.
The power command that wireless terminal power order tracking module 232 is followed the tracks of through producing and send to wireless terminal is used for wireless terminal.For instance, in certain embodiments, for power-controlled wireless terminal, wireless terminal power order tracking module 232 is stored about the information of the power command that sends to wireless terminal and/or the cumulative information of power command signaling.In certain embodiments, wireless terminal power order tracking module 232 adds up to order and/or trace command, and/or follow the tracks of the expected results of the order during the time interval, send, the described time interval is for example corresponding to time between the report of wireless terminal through-put power rollback continuously.
Wireless terminal rollback report processing module 234 is handled institute's wireless terminal through-put power rollback that receives and (is for example reported, handle the signal of the Dedicated Control Channel section that receives) to obtain the information place value and the recovering information (for example, the power level information that is transmitted) of the report of through-put power rollback.In certain embodiments, under different operator schemes, different forms is used in the report of wireless terminal through-put power rollback.For instance, in an one exemplary embodiment, transfer under the form DCCH operator scheme at whole tone, the report of wireless terminal through-put power rollback is 5 reports, and separates under the form DCCH operator scheme at tone, and the report of wireless terminal through-put power rollback is 4 reports.In various embodiments, the power information that transmits via the rollback report relates to early than the time point that begins to transmit Dedicated Control Channel section (for example) predetermined migration that reports back.
Comparison module 236 uses from one or more information that receives report of wireless terminal rollback and the acquisition of wireless terminal power order tracking module and comes control operation of comparison actual wireless terminal power and the expection wireless terminal power control operation of controlling signaling based on the wireless terminal power of base station commands, to carry out the wireless terminal power control operation.Difference between the order that base station commands and wireless terminal are implemented may comprise owing to the arbitrary reason in many reasons: fail to receive institute's transmission command signal, fail and recover institute's command signal, wireless terminal and have a mind to decision and ignore order and/or wireless terminal and have a mind to decision and revise the order that receives.
Power estimation module 237 estimate during being used to transmit one period of predetermined group signal wireless terminal special-purpose quantity of power.In certain embodiments, the estimation of using the following to come Executive Module 237: institute's received power information for example receives the report of through-put power rollback from one or more; And the information of the change in the dedicated transmissions power of indication institute's transmission of control signals (for example being directed to institute's transmission power control signal of wireless terminal) defined.In certain embodiments, institute's received power information indication during single transmission period, be used to transmit predetermined group signal special-purpose quantity of power.In some these type of embodiment, predetermined group signal is special-purpose control channel signals.In various embodiments, power estimation module 237 use uplink communications to postpone and downlink communication at least one in postponing estimate during being used to transmit predetermined one period organizing signal wireless terminal special-purpose quantity of power.In some these type of embodiment, uplink communication postpones to comprise that uplink transmission delay and downlink transmission postpone, and downlink communication postpones to comprise that downlink transmission postpones and the down link signal processing delay.Figure 10 postpones to provide the example of estimation according to up link and downlink communication.
Error rate estimation module 238 is used and is come estimated error rate from the information of comparison module 236, for example with fail to implement to order the error rate that is associated.In certain embodiments, the probability that 238 estimations of error rate estimation module will be received with the power control command that sends to wireless terminal, successfully recover and/or the suitable possibility of implementing is associated.In certain embodiments, error rate estimation module 238 produces the estimation that power is adjusted the signal error rate.
Comparison module 236 and/or error rate estimation module 238 produce and/or use estimated different information 282.
Adjusting module 240 uses estimated different information to adjust follow-up wireless terminal power order tracking and/or subsequent power control command signaling.For instance, in certain embodiments, adjusting module 240 produces the adjustment information for the treatment of by wireless terminal through-put power command module 230 and/or 232 utilizations of wireless terminal power order tracking module 284 (for example scale factor is adjusted parameter and/or weighting parameters).In certain embodiments, adjusting module 240 is revised estimated quantity of power according to module 238 determined estimated error rates.
For given wireless terminal, peak transfer rate determination module 241 determine based on the estimated quantity of power that is exclusively used in described predetermined group of signal described wireless terminal at least some uplink service with the peak transfer rate that uses and/or described wireless terminal at least some uplink service with in the maximum power of using at least one.In certain embodiments, peak transfer rate determination module 241 is determined in the quantity of power that can be used for ul transmissions after maximum available uplink power amount is removed estimated quantity of power at wireless terminal.
Data/information 220 comprise system data/information 242, many group wireless terminal rollback report informations that receives (the wireless terminal rollback that receives report 1 information 252 ..., the wireless terminal rollback that receives report n information 254) and wireless terminal data/information 256.System data/information 242 comprises down link sequential/frequency structure information 244, up link sequential/frequency structure information 246, wireless terminal rollback reporting format information 248 and wireless terminal power command format information 250.
Wireless terminal data/information 256 comprise many group wireless terminal data/information (wireless terminal 1 data/information 258 ..., wireless terminal N data/information 260).Wireless terminal 1 data/information 258 comprises wireless terminal identifying information 262, Dedicated Control Channel pattern information 264, base station attachment point information 266, user/device/session/resource information 268, user data 270, peak transfer rate information 273, target institute received power information 271, (institute's received power measures 1 272 to the received power measurement of a plurality of institutes, ..., institute's received power measuring N 274), wireless terminal power control command trace information 276, the wireless terminal through-put power rollback that receives reports 1 278, the wireless terminal through-put power rollback that receives reports 2 280, estimated different information 282, adjustment information 284, uplink communication deferred message 286 and downlink communication deferred message 288.
Down link sequential/frequency structure information 244 comprises the downlink channel structure, it comprise identification in order to wireless terminal through-put power pass down the line to the information, downlink carrier frequency information, downlink tone block information, down link OFDM time sequence information of the section of indivedual wireless terminals, about the information and the downlink tone jump information of the grouping of OFDM Transmission Time Interval.Down link sequential/frequency structure information 244 comprises recurrence power control signaling scheduling information 251.Recurrence power control signaling scheduling information 251 comprises power control signaling rate information 253.Up link sequential/frequency structure information 246 comprises uplink channel structure, and it comprises that identification is in order to the information of the Dedicated Control Channel section of passing on the report of wireless terminal through-put power rollback, uplink carrier frequency information, uplink tone block information, up link OFDM time sequence information, about the information and the uplink tone jump information of the grouping of OFDM Transmission Time Interval.Up link sequential/frequency structure information 246 comprises recurrence DCCH report schedule information 255.Recurrence DCCH report schedule information 255 comprises rollback report schedule information 257.Rollback report schedule information comprises rollback report signaling rate information 259.The table 1099 of Fig. 6 is that the whole tone of Dedicated Control Channel operation transfers the recurrence DCCH of the beacon slot of format pattern to report the example of schedule information, and it discerns the position of 5 the uplink transmission power rollback reports of scheduling (ULTXBKF5) in recurrence scheduling.The table 3299 of Fig. 7 is examples of the recurrence DCCH report schedule information of the tone of the Dedicated Control Channel operation beacon slot that separates format pattern, the position of 4 the uplink transmission power rollbacks reports of scheduling (ULTXBKF4) in its identification round-robin scheduling.
Wireless terminal rollback reporting format information 248 comprises that identification is used for whole tone accent form DCCH operator scheme and separates the information that the wireless terminal rollback of form DCCH operator scheme is reported employed form with tone.In an one exemplary embodiment, wireless terminal through-put power rollback reporting format is according to wireless terminal DCCH operator scheme, and for example 5 reports are used for whole tone and transfer DCCH pattern and 4 reports to be used for tone to separate form DCCH pattern.Format information 248 comprises the information of the value that each transmitted (for example, with dB being unit) in the potential bit pattern of discerning 4 and 5 rollback reports.The table 1100 of Fig. 8 comprises the wireless terminal rollback reporting format information of exemplary 5 reports, and the table 1200 of Fig. 9 comprises the wireless terminal rollback reporting format information of exemplary 4 reports.
Wireless terminal power command format information 250 comprises that mapping can be by the information of power control command (for example, increment order that is associated with a bit pattern and the decrement order that is associated with different bit patterns) information conveyed.In certain embodiments, single position is in order to pass on increment or decrement order.In certain embodiments, the power control command of wireless terminal uses the single OFDM key signature of passing on single modulation symbol, and described modulation symbol makes power control command encoded.
The wireless terminal rollback that receives report 1 information 252 ..., the wireless terminal rollback that receives report n information 254 comprise many group report informations, it comprises corresponding to a plurality of and receives preliminary treatment and the post-processing information that wireless terminal through-put power rollback is reported.Some reports may be from different wireless terminals, and some reports may be from identical wireless terminal.For instance, in an one exemplary embodiment, corresponding to base station 200 attachment point, use the wireless terminal (it is in whole tone and transfers in the form DCCH pattern) of attachment point to use first form (for example, 5 bit formats) of the pre-selected DCCH section of utilizing in the recurrence transmission time sequence pattern (follow the DCCH whole tone and transfer form) to transmit the report of through-put power rollback.Similarly, in an one exemplary embodiment, corresponding to base station 200 attachment point, use the wireless terminal (it is in tone and separates in the form DCCH pattern) of attachment point to use second form (for example, 4 bit formats) of the pre-selected DCCH section of utilizing in the recurrence transmission time sequence pattern (follow the DCCH tone and separate form) to transmit the report of through-put power rollback.
In various embodiments, for given wireless terminal, the transmission frequency of through-put power rollback report is less than the transmission frequency of wireless terminal power order.For instance, in certain embodiments, the speed of power control signaling from the base station to the wireless terminal is at least 20 times of the speed of wireless terminal through-put power rollback report signaling from the wireless terminal to the base station.Therefore, in some these type of embodiment, for given wireless terminal, wireless terminal through-put power command module produces wireless terminal rollback report processing module 234 and handles at least 20 times the command signal that institute's through-put power rollback that receives is reported used command signal.
Wireless terminal identifying information 262 comprises the wireless terminal identifier that assign the base station, for example active user identifier and/or unlatching (ON) state recognition symbol.DCCH module 264 identified wireless terminal DCCH operator schemes, for example: form DCCH pattern transferred in whole tone, and wireless terminal is through being assigned the logic DCCH tone that will be used for by wireless terminal with logic tones associated uplink DCCH section under this pattern; And tone separates DCCH operator scheme, the logic DCCH channel tone that wireless terminal has the child group of the DCCH section that will be used by wireless terminal and be associated with logic tones to be associated through appointment under this pattern.In various embodiments, different radio terminal transmission back-off reporting format in the recursive structure and/or reported position are according to DCCH pattern 264.
Base station attachment point information 266 comprises identified wireless terminal 1 employed base station attachment point, corresponding to the information of the base station attachment point of the right combination of base station section and downlink/uplink tone blocks.User/device/sector/resources/information 268 comprises (for example) customer identification information, user state information, the device identifying information, device state information, device control parameters, session state information, session state information, peer node information, addressing information, routing iinformation and resource information, described resource information are for example for distributing to WT1 with as the downlink power control command section of private resource with distribute to WT1 with the up link Dedicated Control Channel section as private resource, in order to pass at least some in the wireless terminal through-put power Dedicated Control Channel section that rollback is reported.
User data 270 comprises corresponding to (for example) speech data that transmits in up link and/or downlink traffic channel segments, view data, voice data, text data, file data or the like.Target institute received power information 271 is current goal institute received power levels that (for example) is associated with Dedicated Control Channel, and the described current goal of use institute received power level in the closed power control operation is being carried out in the base station with respect to Dedicated Control Channel.In various embodiments, the Dedicated Control Channel of given wireless terminal (for example, WT 1) is used the unity logic tone, and the unity logic tone can (and sometimes) according to up link jump information and frequency hopping.
Institute's received power measures 1 272 ..., institute's received power measuring N 274 is the results that obtain with respect to the Dedicated Control Channel signal that receives from wireless terminal 1 in different time points and from power measurement module 228.
Wireless terminal power control command trace information 276 comprises: be included in the information that information, the cumulative information corresponding to the serial command that sends to wireless terminal 1, the time sequence information that is associated with order and identification in the specific order that is sent to wireless terminal 1 reset, described for example the reinitializing and/or readjusting after handling the report of reception rollback that reset.
The rollback that receives report 1 278 and the rollback that receives report that 2 280 comprise the information corresponding to report, described report for example be to report from continuous, the through-put power rollback of wireless terminal 1 transmission.In various embodiments, the dump power amount (for example, with dB being unit) that wireless terminal must use after considering the employed quantity of power of Dedicated Control Channel is passed in the report of through-put power rollback.
In various embodiments, independent module is used for the different base station sector and/or the base station section attachment point of base station 200.For instance.In an one exemplary embodiment, it is right to exist corresponding to each the independent base station transmits device/receiver in the sector of base station, and wherein the individual component of separate antenna and/or sectorized antennas is used in each sector.In certain embodiments, operation dispatching on the basis of each attachment point, wherein attachment point is followed recursive structure and have one group of Dedicated Control Channel tone (for example, 31 DCCH tones) to distribute in the different radio terminal of using the base station section attachment point.
Fig. 3 is the figure according to the exemplary wireless terminal 300 (for example, mobile node) of various embodiment enforcements.Exemplary wireless terminal 300 can be any one in the wireless terminal of Fig. 1.Exemplary wireless terminal 300 comprises receiver module 302, transmitter module 304, processor 306, user I/O device 308 and the memory 310 that is coupled via bus 312, and various elements are interchange of data and information on described bus.
Memory 310 comprises routine 318 and data/information 320.Processor 306 (for example CPU) executive routine 318, and the data/information 320 in the use memory 310 is controlled the operation and the implementation method of wireless terminal 300.User I/O device 308 (for example, microphone, keyboard, keypad, switch, camera, display, loud speaker or the like) in order to import the various functions of user data, output user data, permission user's controlling application program and/or control wireless terminal, for example initiation communication session.
Receiver module 302 (for example, the OFDM receiver) is coupled to reception antenna 303, wireless terminal 300 via reception antenna 303 from base station receiving downlink signal.The signal that institute's receiving downlink signal comprises (for example) beacon signal, pilot signal, downlink traffic channel signals, the power control signal that comprises the closed power control signal, timing control signal, appointment signal, registers response signal and comprise the wireless terminal identifier that assign the base station, unlatching (ON) state recognition that for example is associated symbol with DCCH logic channel tone.Receiver module 302 comprises in order at least some the decoder 314 in the decoding institute receiving downlink signal.
Transmitter module 304 (for example, the OFDM transmitter) is coupled to transmit antenna 305, and wireless terminal 300 is transferred to the base station via transmit antenna 305 with uplink signal.In certain embodiments, the same antenna is used for receiver and transmitter, and for example antenna is coupled to receiver module 302 and transmitter module 304 via duplexer.Uplink signal comprises (for example) register requirement signal, Dedicated Control Channel segment signal (for example, reception and registration can and comprise the report of the WT power report of for example WT through-put power rollback report by the reference signal of base station measurement) and uplink traffic channel segments signal.Transmitter module 304 comprises the encoder 316 in order to coding at least some in the uplink signal.In this embodiment, encoding D CCH section on every section basis.
Routine 318 comprises communication routines 322 and wireless terminal control routine 324.Communication routines 322 is implemented wireless terminal 300 employed various communication protocols.Wireless terminal control routine 324 comprises report generation module 326, wireless terminal through-put power control module 330, Dedicated Control Channel control module 332, tone jump module 334 and reporting format control module 336.Report generation module 326 comprises calculating sub module 328.
Report generation module 326 (for example produces the power report, the report of wireless terminal through-put power rollback), the maximum transmission power and the ratio of the reference signal with the known power level of wireless terminal of each power report indication wireless terminal in the through-put power of the time point of reporting corresponding to power.Wireless terminal through-put power control module 330 is used for controlling based on the information that comprises at least one the closed power level controling signal that receives from the base station transmission power level of wireless terminal.The closed power level controling signal that receives from the base station can be in order to control wireless terminal transmitter power so that realize the signal of desired received power level in the base station.In certain embodiments, the base station does not have the practical intelligence of the actual transmission power level and/or the maximum transmission power level of wireless terminal.In some system implementation plans, different devices can have different maximum transmission power level, for example desk-top wireless terminal can have the maximum transmission power ability that is different from the computer-implemented wireless terminal of portable notebook (for example, relying on battery power operation).
Wireless terminal through-put power control module 330 is carried out the closed power control of the transmission power level that is associated with Dedicated Control Channel and is adjusted.Dedicated Control Channel control module 332 determines which the unity logic tone in a plurality of logic tones will be used for the Dedicated Control Channel signaling, and described unity logic tone is exclusively used in wireless terminal and is used for using one group of Dedicated Control Channel section to come the process of control channel.
Tone jump module 334 is determined in different time points will be in order to the single one physical OFDM tone in a plurality of continuous OFDM symbol transmission time interim transmission Dedicated Control Channel information.For instance, in an one exemplary embodiment, Dedicated Control Channel section corresponding to single Dedicated Control Channel logic tones comprises 21 OFDM key signatures, described 21 OFDM key signatures comprise three groups of 7 OFDM key signatures, 7 OFDM key signatures of each group are corresponding to the half crack in seven continuous OFDM symbol transmission periods and corresponding to physics OFDM tone, each group in three groups can wherein be determined one group OFDM tone corresponding to different physics OFDM tones according to tone jump information.Reporting format control module 336 uses which person in a plurality of Dedicated Control Channel operator schemes to come the form of power controlling report when transmission is reported according to wireless terminal 300.For instance, in one embodiment, wireless terminal is transferred DCCH operator scheme following time to use 5 bit formats to be used for the power report and is used 4 power reports being in tone lock out operation pattern following time being in whole tone.
Calculating sub module 328 deducts every tone through-put power (is unit with dBm) of up link Dedicated Control Channel from the maximum transmission power (is unit with dBm) of wireless terminal.In certain embodiments, maximum transmission power is set point (for example, being stored in predetermined value in the wireless terminal or (for example) are sent to wireless terminal from the base station value), and is stored in the wireless terminal.In certain embodiments, maximum transmission power depends on the power output capacity of wireless terminal.In certain embodiments, maximum transmission power depends on the type of wireless terminal.In certain embodiments, maximum transmission power depends on the operator scheme of wireless terminal, for example, wherein different patterns corresponding in the following operation at least both: use the operation of external power source, use the operation of battery, use has the operation of the battery of the first energy reserve level, use has the operation of the battery of the second energy reserve level, use has the operation of the energy reserve of desired amount with the battery of first duration of support operating time, use has the operation of the energy reserve of desired amount with the battery of second duration of support operating time, be in the operation of normal power mode, be in the operation of power saving mode, the described maximum transmission power in the power saving mode is lower than the described maximum transmission power in the described normal power mode.In various embodiments, the maximum transmission power value is through selecting the value with the statutory regulation of the peak power output level of abideing by the restriction wireless terminal, and for example the maximum transmission power value is through being chosen as maximum allowable level.Different device can have the different maximal power level abilities that the base station may be known or unknown.Can (and in certain embodiments really so) but use rollback report when definite support uplink traffic channel data treating capacity (for example, every span line treating capacity) in the base station, described treating capacity can be by the wireless terminal support.This is because the rollback report provides the information about the excess power that can be used for traffic channel transmission, even the base station may provide the rollback report owing to the form with certain ratio and the maximum capacity of unknown employed actual transmission power level or wireless terminal.
In certain embodiments, wireless terminal can be supported one or more wireless connections simultaneously, and each connection has corresponding maximum transmission power level.Maximum transmission power level (indicated by value) can be different for different connections.In addition, for given connection, the maximum transmission power level can change along with the time, when for example the linking number of supporting when wireless terminal changes.Therefore, know the maximum transmission power ability of wireless terminal even it may be noted that the base station, the number of the communication link that wireless terminal is supported at particular point in time may not known in the base station yet.Yet rollback report provides the information of informing base station about the available horsepower of given connection, and do not need the base station know may consume power resources other may have connection now.
Data/information 320 comprises information 393, encoded DCCH segment information 391 and the DCCH pattern information 389 of user/device/session/resource information 340, system data 342, institute's received power control signal information 384, maximum transmission power information 386, DCCH power information 390, time sequence information 392, DCCH channel information 394, base station identification information 398, terminal identification information 399, power report information 395, extra DCCH report.DCCH channel information 394 comprises through assignment logic tone information 396, for example discerns the current information that is assigned to the unity logic DCCH channel tone of wireless terminal by the base station attachment point.
User/device/session/resource information 340 comprises session information, security information, state information, peer node identifying information, peer node addressing information, routing iinformation, the air link resources information (for example being assigned to up link and/or the downlink channel segment of WT 300) of customer identification information, username information, user security information, device identifying information, type of device information, device control parameters, for example peer node information.Received power control information 384 comprises the WT power control command that receives from the base station, and it increases, reduces or do not change the transmission power level of wireless terminal in order to (for example) control channel controlled with respect to closed power (for example, DCCH channel).Maximum transmission power information 386 comprises employed maximum wireless terminal transmission performance number when through-put power is reported.Reference signal information 397 comprises that reference signal that identification will use (for example in power report is calculated, as the DCCH channel signal) and reference signal in the information of sometime transmission power level, determine described time point based on beginning transmission time of the DCCH section of delivering power report and power report time offset information 372.DCCH power information 390 is to use the result of the calculating sub module 328 of maximum transmission power information 386 and the 397 conduct inputs of reference signal information.Represent DCCH power information 390 by the bit pattern that is used for the delivering power report in the power report information 395.The information 393 of extra DCCH report comprises the information corresponding to the DCCH report of other type, (for example) other DCCH report for example is 1 uplink traffic channel request report or 4 uplink traffic channel request reports that report transmits as power in identical DCCH section.Encoded DCCH segment information 391 comprises the information of representing encoded DCCH section, for example passes on the DCCH section of power report and extra report.Time sequence information 392 comprises that the information of sequential of identification reference signal information and identification will be in order to the information of the sequential of the beginning of the DCCH section of delivering power report.Time sequence information 392 comprises the information of discerning current sequential, for example, makes and reports schedule information relevant (for example, with relevant through index DCCH section) through index OFDM symbol sequential with recurrence DCCH in up link sequential and the frequency structure.Also use time sequence information 392 to jump to determine tone by tone jump module 344.Base station identification information 398 comprises the information of the identification base station, base station section and/or the base station tone blocks that are associated with the employed base station of wireless terminal attachment point.Terminal identification information 399 comprises the wireless terminal identifying information, and it comprises the wireless terminal identifier that assign the base station, for example the wireless terminal opening identifier that will assign with DCCH channel segment associated base station.DCCH channel information 394 comprises that the information of one in channel or a plurality of tone segregated channel transferred in (for example) whole tone.Assignment logic tone information 396 comprises that identification will be used for the information of the logic DCCH tone of its DCCH channel by WT 300, the tone of discerning of the WT opening identifier of for example come a DCCH logic tones of the sets of tones that self information 354 discerned, assigning corresponding to the base station of Termination ID information 399.DCCH pattern information 389 comprises that current DCCH operator scheme is identified as (for example) whole tone transfers format operation pattern or tone to separate the information of format operation pattern.In certain embodiments, DCCH pattern information 389 also comprises the information of identification corresponding to the different operation modes (for example normal mode and power saving mode) of the different value of maximum transmission power information.
System data/information 342 comprises many group base station data/information (BS 1 data/information 344, BS M data/information 346), DCCH transmission report schedule information 362, power report time offset information 372 and DCCH reporting format information 376.BS 1 data/information 344 comprises down link sequential/frequency structure information 348 and up link sequential/frequency structure information 350.Down link sequential/frequency structure information 348 comprises: information, downlink channel segment structure, downlink tone jump information, downlink carrier frequency information and the down link time sequence information (comprising the grouping of OFDM symbol sequential information and OFDM symbol) of identification downlink tone set (for example, the tone blocks of 113 tones) and about the time sequence information of down link and up link.Up link sequential/frequency structure information 350 comprises uplink logical sets of tones information 352, tone jump information 356, sequential organization information 358 and carrier information 360.Uplink logical sets of tones information 352 (for example, information corresponding to one group of 113 uplink logical tone in the employed uplink channel structure of base station attachment point) comprise DCCH logic channel tone information 354, for example corresponding to the information of the child group of 31 logic tones that are used for Dedicated Control Channel, the wireless terminal that wherein is in opening uses the BS1 attachment point to receive one in 31 tones to be used for its Dedicated Control Channel section signaling.Carrier information 360 comprises the information of identification corresponding to the uplink carrier frequency of base station 1 attachment point.
DCCH transmission report schedule information 362 comprises DCCH whole tone mode transfer formula recurrence report schedule information 364 and tone clastotype recurrence report schedule information 366.Whole tone mode transfer formula recurrence report schedule information 364 comprises power report schedule information 368.Tone clastotype recurrence report schedule information 366 comprises power report schedule information 370.DCCH reporting format information 376 comprises power reporting format information 378.Power reporting format information 378 comprises full tone pattern information 380 and tone clastotype information 382.
DCCH transmission report schedule information 362 is used to control the transmission that the DCCH that produces of institute reports.Whole tone mode transfer formula recurrence report schedule information 364 is used in wireless terminal 300 control DCCH report when whole tone transfers the DCCH mode of operation to do.DCCCH recurrence report schedule information 364 transferred in the exemplary whole tone of Figure 109 9 explanations of Fig. 6.Exemplary power report schedule information 368 is that indication section 1006 (index s2=6) and section 1026 (index s2=26) respectively are used to pass on the information of 5 wireless terminal uplink transmission power rollback reports (ULTXBKF5).The exemplary tone clastotype DCCCH recurrence report of Figure 32 99 explanations schedule information 366 of Fig. 7.Exemplary power report schedule information 370 is that indication section 3203 (index s2=3) and section 3221 (index s2=21) respectively are used to pass on the information of 4 wireless terminal uplink transmission power rollback reports (ULTXBKF4).
DCCH reporting format information 376 indication be used for the DCCH report each form (for example, the figure place in the report) and can with each information that is associated in the potential bit pattern of report communication.Exemplary whole tone mode transfer formula power reporting format information 380 comprises the information corresponding to the table 1100 of Fig. 8 of the form of explanation ULTxBKF5.Exemplary tone clastotype power reporting format information 382 comprises the information corresponding to the table 1200 of Fig. 9 of the form of explanation ULTxBKF4.Rollback report ULTxBKF5 and ULTxBKF4 indication dB value.
Power report time offset information 372 comprises that indication institute's power that produces reports (for example, being provided for its information) pairing time point and will transmit the information of the time migration between the beginning of communication section of described report.For instance, consider and in exemplary uplink segments, to transmit the ULTxBKF5 report, and the reference signal that is used to produce report is the Dedicated Control Channel signal corresponding to the section 1006 (index s2=6) of beacon slot.In the case, time migration information 372 comprises the information of the time migration between the beginnings that pairing time of order report information (for example, corresponding to the OFDM symbol transmission time before the transmission time of the report of the reference signal of for example DCCH signal, transmission power level at interval) and section 1006 transmit.
Fig. 4 is the picture group 600 that explanation is followed the tracks of according to exemplary signaling and the wireless terminal power of various embodiment.Time is by horizontal line 601 expressions.Figure 60 2 explanations are by the exemplary power control signaling of base station transmits to wireless terminal.To upward arrow indicated horsepower control signal order WT increase DCCH channel signal power predetermined factor (for example ,+1dB), and arrow indicated horsepower control signal order WT (for example ,-1dB) reduces DCCH channel signal power predetermined factor downwards.
WT for example is to use the base station as its current attachment point and have the WT that assigns from the base station and open identifier and use the WT that is in the open operation state that opens the Dedicated Control Channel uplink segments of identifier corresponding to the WT that assigns.Figure 60 4 explanations use the Dedicated Control Channel section to report from the exemplary power availability that wireless terminal is transferred to the base station, for example WT transmitter power rollback report.In this example, from wireless terminal a power availability report is transferred to the base station at per 20 the power availability signals from the base station transmits to the wireless terminal.Power availability report transmission information makes the base station can determine the level of WT DCCH channel power.
Figure 60 6 explanations are by the WT decipher of base station transmits to institute's received power control signal of WT.The WT decipher of institute's received power control signal be inaccurate ground match map 602 institute's transmission signals.For instance, interference noise may destroy signal, and may not recover set value from received signal.Figure 60 8 identifications may wrong X occur in the control signaling.
DCCH power level that the WT DCCH power that Figure 61 0 explanation base station is estimated, its combination are determined from institute's received power availability and base station transmits are to the increment power control signal of WT.Figure 61 2 explanation wireless terminal DCCH power, DCCH power level and its decipher that its combination is associated with the power availability report to institute's received power control signal.Should observe, the mistake in the recovery of control signal causes the difference between the estimated WTDCCH power of actual DCCH power level of WT and base station.Yet when the base station receives new power availability report (for example, power availability report R1), it can be refreshed to the estimation of the DCCH power actual level with coupling WT in the base station.For instance, base station received power availability report R1, it determines DCCH power level R1v dBs according to described report, with itself and its estimation (Rv+8) dBs of DCCH power is compared.From WT DCCH power diagram 612 as seen, (Rv+6) dBs=R1v dBs; Therefore the base station recognizes that its estimation departs from+2dBs.
Power control signaling in this one exemplary embodiment can be via an information bit delivering power control signal.Yet the rollback report utilizes more position, for example 4 or 5 information bits.In some other embodiment, the rollback report can utilize the information bit of different numbers, for example 6 or 7 information bits.Base station expects and tolerance are about the error rate of power control signaling.Interval between the power availability report is wide more, and average used overhead is just few more, but expected error rate will be expected greatly more.The power availability report is spaced apart intentionally, so that refresh the estimation of base station to the DCCH power level, and will expect that difference remains in the tolerance.
In some embodiments of the invention, add extra feature, it is in order to improve understanding and the tracking of base station to WT DCCH power.If correctly receive all orders, the base station can expect that it reports the DCCH power level of extraction from power availability with coupling to the estimation of DCCH power so.Yet if there is mismatch (so shown in the example), the base station can produce the estimated amount that power is adjusted the estimation of signal and revised power according to the error rate of estimating so.For instance, in Figure 60 0, after the base station receives report R1 and determines to have the power difference of 2dB, the error rate of base station estimating power control signal, 1 bust this of for example per 20 transmission.The base station can use this information to revise its estimation in its follow-up WT DCCH power level estimation.For instance, the base station in it is estimated again each transmission power control signal of convergent-divergent with expression+18/20dBs or-change of 18/20dBs but not+1dB or-change of 1dB.
Fig. 5 is a flow chart 800 of operating the exemplary method of base station according to the present invention.Exemplary method of operation starts from step 802, and wherein the base station is through powering up and initialization.Operation in the step 802 comprises that the operation base station is assigned to the wireless terminal of base station as its current attachment point wireless terminal is opened identifier, wireless terminal is opened identifier and the special use in employed up link sequential in base station and the frequency structure and is controlled subchannel be associated (for example, unity logic tone).Wireless terminal (for example) uses its special use that is assigned control subchannel that the uplink channel report is sent to the base station according to predetermined report scheduling.Operation proceeds to step 804,806 and step 808 from step 802.Operation also proceeds to step 810 via connected node A 809 from step 802.In certain embodiments, operation proceeds to step 812 via connected node B 811 from step 802.
In step 804, the base station receives the power information from wireless terminal, and described power information indication is exclusively used in the quantity of power that group signal (for example, using section one group of signal that is transmitted of the special use control subchannel through assigning) is scheduled in transmission.In certain embodiments, received power information indication is exclusively used in the quantity of power of the described predetermined group of signal of transmission during single transmission period.In this example, in step 804, the base station receives Dedicated Control Channel (DCCH) through-put power rollback report 814 and exports the wireless terminal power information 816 that is received.Step 804 repeats on the basis of advancing, and for example, wherein base station in response is in transmit the report of DCCH through-put power rollback from each of base station.In certain embodiments, the through-put power rollback report of scheduling wireless terminal is to transmit twice during each beacon slot.In certain embodiments, beacon slot has the duration in 912 OFDM symbol transmission periods.
In step 806, the power control signal of operation base station to determine according to the mass measurement of received signal and desired signal quality level to transmit at particular point in time.Operation proceeds to step 818 from step 806, wherein operates the base station power control signal is transferred to described wireless terminal on wireless communication link.Operation proceeds to step 820 from step 818.In step 820, the operate wireless terminal is to follow the tracks of by the dedicated transmissions power of institute's transmission power control signal regulation and by the change in the dedicated transmissions power of described transmission power control signal regulation.The power that step 820 output is ordered changes information 822.Step 806,818 and 820 operation can repeat on the recurrence basis.In certain embodiments, with first rate received power information signal (for example, DCCH through-put power rollback report), and with the power control signal of the second speed forwarding step 818 faster than described first rate.In some these type of embodiment, at least 20 times soon of the second speed ratio first rates.
In step 808, the base station estimates that wireless terminal is exclusively used in the quantity of power of the described predetermined group of signal of transmission during being used to transmit the period of being scheduled to the group signal.Use institute's WT power information that receives 816 and indicate the information (the power change information 822 of being ordered) of the change in the dedicated transmissions power of transmission of control signals defined to come the estimation of execution in step 808.The power information 824 that step 808 output is estimated.In certain embodiments, estimating that described wireless terminal special-purpose quantity of power during being used for transmitting the described period of described predetermined group of signal comprises uses uplink communication to postpone and at least one of downlink communication delay.In some these type of embodiment, uplink communication postpones to comprise uplink transmission delay and uplink signal processing delay, and downlink communication postpones to comprise that downlink transmission postpones and the down link signal processing delay.
In certain embodiments, operation proceeds to step 812 from step 802 via connected node B 811.In step 812, the base station produces the estimation that power is adjusted the signal error rate.Operation proceeds to step 826 from step 812.In step 826, estimated quantity of power 824 is revised according to estimated error rate in the base station, thereby produces modified estimating power information 828.In certain embodiments, the modification of step 826 is according to the power control signal that is transmitted during the period before the described modification of estimating power amount.
For each uplink traffic channel segments that is assigned to wireless terminal via the regular traffic channel assignment messages, operation proceeds to step 810 via connected node A 809 from step 802.In step 810, the base station determines that based on the estimating power amount that is exclusively used in described predetermined group of signal (for example, using estimated power information 824 and/or modified estimating power information 828) wireless terminal is at the peak transfer rate of uplink traffic channel segments with use.Step 810 comprises substep 830, and wherein the remaining quantity of power that can be used for ul transmissions after the estimating power amount of the quantity of power of removing described estimation from the maximum available power amount or described modification is determined in the base station.
Figure 10 is Figure 130 0 that the exemplary power control signaling between base station and the wireless terminal (for example, mobile node) is described according to various embodiment.Figure 10 illustrates the various features of some embodiment.Figure 130 0 comprises Figure 130 2 of expression base station perspective view and Figure 130 4 of expression wireless terminal perspective view.Exemplary signal 1306 be from the wireless terminal to the base station reception and registration wireless terminal transmission power information P (n) transmit report.After ul transmissions and processing delay 1308, the base station receives the report to through-put power P (n) of wireless terminal, and is represented as arrow 1308.Exemplary signal 1312 is another through-put power report from the wireless terminal to the base station, for example next subsequent transmission power report.Exemplary signal 1314 is exemplary power command signals (Pc) of the control/reference channel that is used for wireless terminal from the base station to the wireless terminal.After downlink transmission and processing delay 1318, the order of wireless terminal received power, indicated as arrow 1316.
Should observe, in certain embodiments, transmit for example power control signal of signal 1314 with the high speed of wireless terminal through-put power report of ratio such as signal 1306.In various embodiments, the base station to the estimation of wireless terminal through-put power be according to uplink transmission delay and uplink processing postpone, downlink transmission postpones and the down link processing delay at least one.P (n)=travelling carriage is at the used power of time n transmission control/reference channel.Mobile device periodically is transferred to the base station with the instantaneous value of P (n).For instance, the every L of a mobile device chronomere is transferred to the base station with the value of P (n), for example time n=0, L, 2L .....Receive institute's transmission value of the P (n) of mobile device by the base station, wherein have the delay of N chronomere owing to ul transmissions and processing delay.P c(n)=power control command of the control/reference channel of the travelling carriage that the base station is transmitted at time n.Receive this power control command by travelling carriage, wherein have the delay of M chronomere owing to downlink transmission and processing delay.
Figure A200780013055D00251
Then, at any time n=jL+N+k (wherein 0≤k＜L, and j=0,1 ...), the base station is to the estimation of the through-put power of mobile device
Figure A200780013055D00252
Following providing:
P ^ c ( n ) = P ( jL ) + Σ i = 0 i = k + T 0 P c ( n - T 1 - i ) - - - ( 0.1 )
T wherein 0And T 1Be the more selected constants in base station.Note that P (jL) is the last look of the known mobile control/reference channel through-put power in base station.(0.1) estimation of the base station of the adjustment that travelling carriage carries out control/reference channel through-put power in response to power control command that the base station sent represented in the residue term on right side.
Suppose the value of base station known delay N and M.Then, T can be selected in the base station 0And T 1So that minimize
Figure A200780013055D00254
And the difference between the P (n).For instance, the base station can be provided with T 0=N-1 and T 1=M.Specifically, if for all n, P ^ c ( n ) = P c ( n ) (that is, travelling carriage correctly receives all power control commands), T is passed through in the base station so 0And T 1Suitable selection and can guarantee for all n, P ^ ( n ) = P ( n ) .
Then, suppose to have some mistakes in to the estimation of power control command at travelling carriage.Since travelling carriage n=0, L, 2L ... report P (n), thus the base station can by relatively n=0, L, 2L ... the time its estimation
Figure A200780013055D00263
Estimate the probability that these are wrong with P (n).The base station can use this mistake to estimate to become more meticulous its estimation
Figure A200780013055D00264
For instance, suppose that the base station only sends two power capability control commands: order is in order to increasing control/x unit of reference channel through-put power of mobile device, and another order is in order to x unit of minimizing through-put power.Then, the base station to the through-put power of mobile device at any time n=jL+N+k (wherein, 0≤k＜L, and j=0,1 ...) estimation Provide by following:
P ^ ( n ) = P ( jL ) + Σ i = 0 i = k + T 0 [ 1 - 2 p ( n - T 1 - i ) ] P c ( n - T 1 - i ) , - - - ( 0.2 )
Wherein p (t) (t=0,1,2 ...) equal the base station to travelling carriage to power control command P cThe estimation of the error probability in the decipher (t).
Can use the combination of software, hardware and/or software and hardware to implement the technology of various embodiment.Various embodiment are directed to and implement equipment of the present invention, for example mobile node (for example portable terminal), base station, communication system.Various embodiment also are directed to method, for example control and/or operate the method for mobile node, base station and/or communication system (for example, main frame).Some embodiment are directed to machine-readable medium, for example ROM, RAM, CD, hard disk or the like, and it comprises and is used to control the machine-readable medium of machine with one or more steps of implementation method.
In various embodiments, use one or more modules to implement node as herein described to carry out the step corresponding to one or more methods, for example signal processing, message produce and/or transmitting step.Therefore, in certain embodiments, use module to implement various features.Can use the combination of software, hardware and software and hardware to implement this a little modules.Can use machine-executable instruction to implement many said methods or method step, described machine-executable instruction is included in machine-readable medium (storage arrangement for example, for example RAM, floppy disk etc.) in, in order to the control machine (for example, have or do not have the all-purpose computer of additional hardware), in one or more nodes, implement all or part of in the said method with (for example).Therefore, various embodiment especially are directed to machine-readable medium, and it comprises the one or more machine-executable instruction in the step that is used to impel machine (for example, processor and the hardware that is associated) to carry out said method.
Though be described in the situation of ofdm system, at least some in the method and apparatus of various embodiment are applicable to the communication system of the broad range that comprises many non-OFDM and/or non-cellular system.
The those skilled in the art will understand the numerous extra variation of the method and apparatus of above-mentioned various embodiment in view of above description.This a little variation should be considered as in scope.The method and apparatus of various embodiment can (and in various embodiments really so) use with the communication technology of CDMA, Orthodoxy Frequency Division Multiplex (OFDM) and/or various other types, and described technology can be in order to provide wireless communication link between access node and mobile node.In certain embodiments, access node is through being embodied as the base station, and its use OFDM and/or CDMA set up the communication link with mobile node.In various embodiments, mobile node is through being embodied as notebook, the personal digital assistant (PDA) that is used for implementation method or comprising receiver/transmitter circuit and other mancarried device of logic and/or routine.

Claims (55)

1. method of operating the base station, described method comprises:
Reception is from the power information of wireless terminal, and described power information indication is exclusively used in the quantity of power that predetermined group signal is transferred to described base station;
In a period, power control signal is transferred to described wireless terminal; And
Estimation is exclusively used in the described quantity of power of the described predetermined group of signal of transmission by described wireless terminal during described period.
2. method according to claim 1 wherein is transferred to described wireless terminal with described power control signal on wireless communication link.
3. method according to claim 1 wherein receives described power information signals with first rate, and wherein sends described power control signal with second speed faster than described first rate.
4. method according to claim 3, wherein said second speed are at least 20 times of described first rate.
5. method according to claim 3 is wherein used the power information of described reception and is indicated the information of the change in the described dedicated transmissions power of described control signals transmitted defined to carry out described estimation.
6. method according to claim 5, the indication of wherein said power information are exclusively used in the quantity of power of the described predetermined group of signal of transmission during single transmission period.
7. method according to claim 6, it further comprises:
Based on the quantity of power of the described estimation that is exclusively used in described predetermined group of signal determine described wireless terminal at least some uplink service with the peak transfer rate that uses and in the maximum transmission power at least one.
8. method according to claim 1, it further comprises:
Determining according to the mass measurement of received signal and desired received signal quality level will be at the described power control signal of particular point in time transmission.
9. method according to claim 7, wherein said predetermined group of signal comprises control channel signals.
10. method according to claim 7 wherein determines that based on the quantity of power of the described estimation that is exclusively used in described predetermined group of signal in described peak transfer rate and the described maximum transmission power at least one comprises: determine after the quantity of power of removing described estimation from maximum available uplink power amount in the remaining described quantity of power that can be used for ul transmissions of described wireless terminal.
11. method according to claim 7, it further comprises:
The estimation of signal error rate is adjusted in generation to described power; And
Revise the quantity of power of described estimation according to the error rate of described estimation.
12. method according to claim 11, wherein said modification are the described power control signals that basis was transmitted during the period before the described modification of the quantity of power of described estimation.
13. method according to claim 1, wherein estimate described quantity of power that during described period described wireless terminal is exclusively used in the described predetermined group of signal of transmission comprise use uplink communication to postpone and the downlink communication delay at least one.
14. method according to claim 13, wherein said uplink communication postpones to comprise uplink transmission delay and uplink signal processing delay, and wherein said downlink communication postpones to comprise that downlink transmission postpones and the down link signal processing delay.
15. a base station, it comprises:
Receiver module, it is used to receive the power information from wireless terminal, and described power information indication is exclusively used in the quantity of power that predetermined group signal is transferred to described base station;
Transmitter, it is used in a period power control signal is transferred to described wireless terminal; And
Estimation module, it is used to estimate that described wireless terminal is exclusively used in the described quantity of power of transmitting described predetermined group of signal during described period.
16. base station according to claim 15 wherein is transferred to described wireless terminal with described power control signal on wireless communication link.
17. base station according to claim 15 wherein receives described power information signals with first rate, and wherein sends described power control signal with second speed faster than described first rate.
18. base station according to claim 17, wherein said second speed are at least 20 times of described first rate.19. base station according to claim 17 is wherein used the power information of described reception and is indicated the information of the change in the described dedicated transmissions power of described control signals transmitted defined to carry out described estimation.
20. base station according to claim 19, the indication of wherein said power information are exclusively used in the quantity of power of the described predetermined group of signal of transmission during single transmission period.
21. base station according to claim 20, it further comprises:
Maximum determination module, its be used for based on the quantity of power of the described estimation that is exclusively used in described predetermined group of signal determine described wireless terminal at least some uplink service with at least one of the peak transfer rate of use and maximum transmission power.
22. base station according to claim 15, it further comprises:
Power control signalling module, it is used for determining the described power control signal that will transmit at particular point in time according to the mass measurement of received signal and desired received signal quality level.
23. base station according to claim 21, wherein said predetermined group of signal comprises control channel signals.
24. base station according to claim 21, wherein said peak transfer rate determination module are determined after the quantity of power of removing described estimation from maximum available uplink power amount in the remaining described quantity of power that can be used for ul transmissions of described wireless terminal.
25. base station according to claim 21, it further comprises:
The mistake estimation module, it is used to produce the estimation of power being adjusted the signal error rate; And
Adjusting module, it is used for revising according to the error rate of described estimation the quantity of power of described estimation.
26. base station according to claim 25, the described power control signal that wherein said adjusting module basis was transmitted during the period before the described modification of the quantity of power of described estimation is revised the quantity of power of described estimation.
27. base station according to claim 15, it further comprises:
The communication delay determination module, it is used for definite uplink communication postpones and downlink communication postpones at least one.
28. base station according to claim 27, at least one during wherein said estimation module use uplink communication delay and downlink communication postpone estimates that described wireless terminal is exclusively used in the described quantity of power of transmitting described predetermined group of signal during described period.
29. base station according to claim 28, wherein said uplink communication postpones to comprise uplink transmission delay and uplink signal processing delay, and wherein said downlink communication postpones to comprise that downlink transmission postpones and the down link signal processing delay.
30. a base station, it comprises:
Be used to receive the device from the power information of wireless terminal, described power information indication is exclusively used in the quantity of power that predetermined group signal is transferred to described base station;
Be used in a period, power control signal being transferred to the device of described wireless terminal; And
Be used to estimate that during described period described wireless terminal is exclusively used in the device of the described quantity of power of the described predetermined group of signal of transmission.
31. base station according to claim 30 wherein is transferred to described wireless terminal with described power control signal on wireless communication link.
32. base station according to claim 30 wherein receives described power information signals with first rate, and wherein sends described power control signal with second speed faster than described first rate.
33. base station according to claim 32, wherein said second speed are at least 20 times of described first rate.
34. base station according to claim 32 is wherein used the power information of described reception and is indicated the information of the change in the described dedicated transmissions power of described control signals transmitted defined to carry out described estimation.
35. base station according to claim 34, the indication of wherein said power information are exclusively used in the quantity of power of the described predetermined group of signal of transmission during single transmission period.
36. base station according to claim 35, it further comprises:
Determine device, its be used for based on the quantity of power of the described estimation that is exclusively used in described predetermined group of signal determine described wireless terminal at least some uplink service with at least one of the peak transfer rate that uses and maximum transmission power.
37. base station according to claim 30, it further comprises:
Determine device, it is used for determining according to the mass measurement of received signal and desired received signal quality level will be at the described power control signal of particular point in time transmission.
38. base station according to claim 36, wherein said predetermined group of signal comprises control channel signals.
39. base station according to claim 36 wherein saidly is used for determining that at least one device of peak transfer rate and maximum transmission power determines after the quantity of power of removing described estimation from maximum available uplink power amount in the remaining described quantity of power that can be used for ul transmissions of described wireless terminal.
40. base station according to claim 36, it further comprises:
Be used to produce the device of power being adjusted the estimation of signal error rate; And
Be used for revising the device of the quantity of power of described estimation according to the error rate of described estimation.
41. according to the described base station of claim 40, the device of the wherein said quantity of power that is used to revise described estimation is revised the quantity of power of described estimation according to the described power control signal that is transmitted during the period before the described modification of the quantity of power of described estimation.
42. base station according to claim 30, it further comprises:
Be used for determining that uplink communication postpones and at least one device of downlink communication delay.
43. according to the described base station of claim 42, at least one of wherein said device use uplink communication delay that is used for estimating and downlink communication delay estimates that described wireless terminal is exclusively used in the described quantity of power of transmitting described predetermined group of signal during described period.
44. according to the described base station of claim 43, wherein said uplink communication postpones to comprise uplink transmission delay and uplink signal processing delay, and wherein said downlink communication postpones to comprise that downlink transmission postpones and the down link signal processing delay.
45. a computer-readable media, it comprises the machine-executable instruction of the method that is used for the implementation and operation base station, and described method comprises:
Reception is from the power information of wireless terminal, and described power information indication is exclusively used in the quantity of power that predetermined group signal is transferred to described base station;
In a period, power control signal is transferred to described wireless terminal; And
Estimation is exclusively used in the described quantity of power of the described predetermined group of signal of transmission by described wireless terminal during described period.
46., wherein on wireless communication link, described power control signal is transferred to described wireless terminal according to the described computer-readable media of claim 45.
47. according to the described computer-readable media of claim 45, wherein receive described power information signals, and wherein send described power control signal with second speed faster than described first rate with first rate.
48. according to the described computer-readable media of claim 47, wherein said second speed is at least 20 times of described first rate.
49., wherein use the power information of described reception and indicate the information of the change in the described dedicated transmissions power of described control signals transmitted defined to carry out described estimation according to the described computer-readable media of claim 47.
50. according to the described computer-readable media of claim 49, the indication of wherein said power information is exclusively used in the quantity of power of the described predetermined group of signal of transmission during single transmission period.
51. according to the described computer-readable media of claim 50, it further comprises the machine-executable instruction that is used for following operation:
Based on the quantity of power of the described estimation that is exclusively used in described predetermined group of signal determine described wireless terminal at least some uplink service with the peak transfer rate that uses and in the maximum transmission power at least one.
52. according to the described computer-readable media of claim 45, it further comprises the machine-executable instruction that is used for following operation:
Determining according to the mass measurement of received signal and desired received signal quality level will be at the described power control signal of particular point in time transmission.
53. according to the described computer-readable media of claim 51, wherein said predetermined group of signal comprises control channel signals.
54. according to the described computer-readable media of claim 51, it further comprises the machine-executable instruction that is used for following operation:
Determine after the quantity of power of removing described estimation from maximum available uplink power amount in the remaining described quantity of power that can be used for ul transmissions of described wireless terminal with as a described part of determining the step of peak transfer rate based on the quantity of power of the described estimation that is exclusively used in described predetermined group of signal.
55. according to the described computer-readable media of claim 51, it further comprises the machine-executable instruction that is used for following operation:
The estimation of signal error rate is adjusted in generation to power; And
Revise the quantity of power of described estimation according to the error rate of described estimation.
56. according to the described computer-readable media of claim 55, wherein said modification is the described power control signal that basis was transmitted during the period before the described modification of the quantity of power of described estimation.
CNA2007800130554A 2006-04-14 2007-04-16 Methods and apparatus for tracking wireless terminal power information Pending CN101421939A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US79225306P 2006-04-14 2006-04-14
US60/792,253 2006-04-14
US11/487,262 2006-07-14

Publications (1)

Publication Number Publication Date
CN101421939A true CN101421939A (en) 2009-04-29

Family

ID=40631542

Family Applications (1)

Application Number Title Priority Date Filing Date
CNA2007800130554A Pending CN101421939A (en) 2006-04-14 2007-04-16 Methods and apparatus for tracking wireless terminal power information

Country Status (1)

Country Link
CN (1) CN101421939A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011026346A1 (en) * 2009-09-02 2011-03-10 中兴通讯股份有限公司 Method for performing power adjustment to mobile station by base station and base station
CN105519208A (en) * 2013-09-19 2016-04-20 谷歌技术控股有限责任公司 Method and apparatus for estimating transmit power of a wireless device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011026346A1 (en) * 2009-09-02 2011-03-10 中兴通讯股份有限公司 Method for performing power adjustment to mobile station by base station and base station
CN105519208A (en) * 2013-09-19 2016-04-20 谷歌技术控股有限责任公司 Method and apparatus for estimating transmit power of a wireless device
CN105519208B (en) * 2013-09-19 2019-05-03 谷歌技术控股有限责任公司 Method and apparatus for estimating the delivering power of wireless device

Similar Documents

Publication Publication Date Title
US7853281B2 (en) Methods and apparatus for tracking wireless terminal power information
CN101171784B (en) Methods and apparatuses for data rate adaptation
CN101341774B (en) Methods and apparatus for selecting between a plurality of dictionaries
US8811348B2 (en) Methods and apparatus for generating, communicating, and/or using information relating to self-noise
JP4927874B2 (en) Multi-symbol signal including opening symbol and extension
CN103813390B (en) Method and apparatus for link quality feedback in a wireless communication system
CN1748435B (en) System and method for improved uplink signal detection and reduced uplink signal power
CN103313370B (en) For the method and apparatus transmitted and/or use transmission power information
EP2381591B1 (en) Wireless terminal methods and apparatus for use in a wireless communications system that uses a multi-mode base station
JP4584835B2 (en) Power control method and apparatus in wireless communication system
CN102612146B (en) Implement and/or use the method and apparatus of Dedicated Control Channel
US7936741B2 (en) Dynamic uplink control channel gating to increase capacity
CN102884845B (en) Load control in uplink interference cancellation systems with soft decision
CN101897214B (en) Methods and apparatus for making handoff decisions in access terminals capable of operating at different times in best effort and QOS modes of traffic operation
CN1998252B (en) Methods and apparatus for phased deployment of communications systems
CN103874125A (en) Methods and apparatus for flexible reporting of control information
US20080043681A1 (en) Gap and preamble parameters for control channel transmission
WO2004077728A2 (en) Pilot signals for use in multi-sector cells
CN102665265A (en) RNC for 3GPP time-division duplex communication system, receiving station and executing method thereof
EP1949564A2 (en) Methods and apparatus for use in a wireless communications system that uses a multi-mode base station
JP4981908B2 (en) Uplink timing control signal
KR20080057344A (en) Methods and apparatus for controlling a base station's transmission power
CN101421939A (en) Methods and apparatus for tracking wireless terminal power information
US8311013B2 (en) Method for efficiently increasing hand-off and access reliability
CN111492695A (en) User equipment and wireless communication method thereof

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20090429