CN101632238A - Power control method and apparatus - Google Patents
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- CN101632238A CN101632238A CN 200880008099 CN200880008099A CN101632238A CN 101632238 A CN101632238 A CN 101632238A CN 200880008099 CN200880008099 CN 200880008099 CN 200880008099 A CN200880008099 A CN 200880008099A CN 101632238 A CN101632238 A CN 101632238A
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Abstract
Power control for wireless communication may involve determining the transmit power to be used by a wireless device. A wireless device using open loop power control may select a transmit power based on an open loop power equation where a parameter of the power equation may be based on one or more power control messages received from another wireless device. In some aspects, path loss may be estimated for open loop power control and a value for Offset_BSperSS may be obtained from information provided by a base station for closed loop power control. To facilitate a stable combined open-closed loop algorithm, open loop power control may be used to compensate channel changes based on reciprocity, and closed loop power control may be used to compensate interference variations (e.g., as compared to NI provided by a DCD message).
Description
Require priority based on 35U.S.C. § 119
The application requires to enjoy the U.S. Provisional Patent Application No.60/894 that owns together that submitted on March 13rd, 2007, and 647 rights and interests and priority are incorporated the disclosure of this temporary patent application into this paper by reference at this.
Technical field
The application relates generally to radio communication and still is not to relate to uniquely the transmitted power of device is controlled particularly.
Background technology
Electronic equipment can be supported to be used for to send signal and receive one or more communication technologys of information from other electronic equipment to other electronic equipment.For example, wireless device can be supported to be used for by the next wireless technology that communicates with another equipment of electric wave, such as WiMAX, WiFi and CDMA.
In wireless device, can select the transmission power level of signal based on various factors.For example, when sending signal with higher transmitted power, the receiving equipment that is associated can more easily recover any data via this signal transmission.Yet, send and may cause interference with high power levels, and may cause the battery life of mobile device to reduce at adjacent wireless device place.
In view of the above problems, various schemes have been developed to attempt to maintain the optimum balance between high-quality transmission and the acceptable transmission power level.For example, a kind of power scheme of IEEE 802.16 standard to describe, wherein subscriber station can use closed power control procedure or open Loop Power control process to be identified for the transmitted power of reverse link.Under closed power control, the base station sends to subscriber station with power control messages, and subscriber station is selected transmission power level based on these message.Under open Loop Power control, subscriber station is selected transmission power level based on power equation.Here, subscriber station can be identified for some parameters of power equation voluntarily and can obtain other parameter from the base station.
Summary of the invention
Be summary below to the illustrative aspects of present disclosure.Should be appreciated that here any one or more aspect that can refer to present disclosure of quoting to the wording aspect.
Present disclosure relates to the power control that is used for radio communication in one aspect.Particularly, present disclosure relates to and the technology of determining that wireless device is associated the transmitted power of using.
In certain aspects, use the wireless device of open Loop Power control to select transmission power level based on the open loop power equation.Here, the parameter of power equation can be based on one or more message that receives from another wireless device.For example, when subscriber station used open Loop Power control, related base station can send the message that comprises following information, and this information relates to the interference variations that observes at the place, base station.Then, subscriber station can use the information that is received to be provided for the parameter of power equation.For example in the enforcement relevant with IEEE 802.16, the message of reception can comprise being used to provide and is used for the equational Offset_BS of open loop power
PerSSThe information of parameter.
Therefore, in certain aspects, the power control that is used for wireless device can be based on the combination of open Loop Power control and closed power control.For example, subscriber station can be selected transmitted power by using the open loop power equation, and the parameter that wherein is used for power equation is based on one or more clean culture closed power control messages that receives from the base station.Here, power control messages can be come specified power deviant (for example, power increment increases or reduces) based on the interference variations that is observed by the base station.
In certain aspects, the open loop power equation comprises following parameter, and this parameter relates to the path loss on the reverse link from the subscriber station to the base station.In some implementations, subscriber station can be determined path loss parameter based on the estimation to the path loss that is associated with forward link from the base station to the subscriber station.For example, subscriber station can by will be on the forward link the power level of received signal and the base station known power level that is used for sending this signal compare and estimate forward link path loss.
Can be to the definite of path loss based on various factors.For example in some implementations, subscriber station can be estimated path loss on the forward link by handling the control signal that receives via forward link.In some implementations, subscriber station can be specified the path loss of reverse link based on the antenna configurations that base station and subscriber station are used for forward direction and reverse link.In some implementations, subscriber station can carry out filtering to alleviate the big and/or instantaneous change that path loss is estimated to its estimation at the path loss of forward link.In some implementations, subscriber station can be estimated path loss on the forward link based on moving of subscriber station.In some implementations, subscriber station can be determined transmitted power based on the position of subscriber station.
The power control messages that the base station sends also can be based on various factors.For example in some implementations, the regulation transmit power offset can be come based on the interference that observes at the place, base station in the base station.The regulation transmit power offset can be come based on the service quality level that is associated with subscriber station in the base station in some implementations.In some implementations, the regulation transmit power offset can be come based on the mixed automatic repeat request that is associated with subscriber station (" HARQ ") in the base station.In some implementations, the regulation power excursion can be come based on the reception antenna number in the base station.In some implementations, the regulation power excursion can be come based on the gain that is associated with at least one reception antenna in the base station.
In certain aspects, can take measures with help to maintain between open loop and the close loop maneuver pattern synchronously, and help switching between these operator schemes.For example, when when closed loop switches to open loop, can take measures to be used for the equational suitable parameter of open loop power to specify based on the transmission power level that before during close loop maneuver, uses.Also can take measures with providing wrong under so synchronous situation and recover synchronously and losing between the power control operation that maintains base station and mobile radio station.
Description of drawings
These and other illustrative aspects of present disclosure has been described in embodiment and claims and the accompanying drawing hereinafter, wherein:
Fig. 1 is the reduced graph of some illustrative aspects of communication system;
Fig. 2 is the flow chart of some illustrative aspects of power control operation;
Fig. 3 is the flow chart of some illustrative aspects of the operation carried out in order to determine path loss;
Fig. 4 is in order to provide power to control the flow chart of some illustrative aspects of the operation of indicating and carrying out;
Fig. 5 is the flow chart of some illustrative aspects of the operation carried out in order to switch between closed power control and open Loop Power control;
Fig. 6 is the flow chart of some illustrative aspects of the operation carried out for closed loop and open loop operation synchronously;
Fig. 7 is the simplified block diagram of some illustrative aspects of the wireless device of communication system;
Fig. 8 is the simplified block diagram of some illustrative aspects of communication component; And
Fig. 9 is the simplified block diagram that is used to provide as some illustrative aspects of the device of the power control of being instructed here.
According to common practice, the various features shown in the accompanying drawing can not to scale (NTS) be drawn.Thereby, for the sake of clarity, the yardstick of the various features that can at random zoom in or out.In addition, for the sake of clarity, can simplify some accompanying drawings.Therefore, accompanying drawing can not described all parts of setter (for example, equipment) or method.At last, similar label can be used for representing similar features in the whole text in specification and accompanying drawing.
Embodiment
The various aspects of present disclosure are hereinafter described.Should be appreciated that and to embody the instruction here with various forms, and any concrete feature disclosed herein, function or these two only are representational.Based on the instruction here, those skilled in the art are to be understood that aspect disclosed herein can be independent of that any others are implemented and can make up one or more aspect in these aspects in various manners.For example, can use the aspect of any number of setting forth to come device for carrying out said or implementation method here.In addition, except the aspect that set forth here or replace and to use other structure, function or 26S Proteasome Structure and Function to realize such device or can realize such method.In addition, aspect can comprise at least one key element of claim.
For purposes of illustration, various parts and the operation described wireless system are discussed below, subscriber station is identified for the transmitted power that sends to the base station by reverse link in this wireless system.Yet should be appreciated that the instruction here goes for the wireless device and the communication system of other type.
With reference to Fig. 1, show exemplary multi-address radio communication system.Access point 100 (" AP ") comprises a plurality of antenna sets: one group comprises antenna 104 and 106, and another group comprises antenna 108 and 110, and other one group comprises antenna 112 and 114.In Fig. 1, only show two antennas for each antenna sets.Yet in practice can or still less antenna more at each antenna sets utilization.116 (" AT ") that access terminal communicate by letter with 114 with antenna 112, wherein antenna 112 and 114 by forward link 120 with information send to access terminal 116 and by reverse link 118 from the 116 reception information that access terminal.Access terminal and 122 communicate by letter with 108 with antenna 106, wherein antenna 106 and 108 by forward link 126 with information send to access terminal 122 and by reverse link 124 from the 122 reception information that access terminal.In Frequency Division Duplexing (FDD) (" FDD ") system, communication link 118,120,124 and 126 can use different frequency to be used to communicate by letter.For example, forward link 120 and reverse link 118 can use different frequency.
Every group of antenna and/or its zone that is designed to communicate can be called the sector of access point.Therefore, each antenna sets can be designed to accessing terminal in the sector in the zone that access point 100 covers and communicates.
For communicating by letter on the forward link 120 and 126, the transmitting antenna of access point 100 can utilize wave beam to form to improve and be used for the access terminal signal to noise ratio of 116 and 122 forward link of difference.In addition, compare the access point that uses individual antenna all in its overlay area to access terminal and send, use wave beam to form the next access point that sends to random dispersion accessing terminal in its overlay area and may cause still less interference accessing terminal in the neighbor cell.
Now the exemplary operation of the system of Fig. 1 will more specifically be discussed in conjunction with the flow chart of Fig. 2-6.For convenience of description, the operation (perhaps any other operation of discussing or instruct here) of Fig. 2-6 can be described as being carried out by concrete parts (for example, the parts in the system shown in Figure 7 700).Yet should be appreciated that these operations can be carried out and can be used the parts of different numbers to carry out by the parts of other type.It is also understood that in given enforcement and can not use one or more operation described herein.
At first with reference to Fig. 2, shown in square frame 202, at point sometime, subscriber station (for example, the subscriber station 702 of Fig. 7) beginning open Loop Power control.When using open Loop Power control, subscriber station 702 can use the open loop power equation to determine that it will be used for the transmitted power in the transmission of wireless communication link.Hereinafter the beginning open Loop Power control more specifically is discussed in conjunction with Fig. 5.
Shown in square frame 204, during open Loop Power control, subscriber station 702 (for example, the receiver components 706 of transceiver 708) can receive one or more message from association base station (for example, the base station 704 of Fig. 7).In certain aspects, this message comprises the indication that relates to the transmitted power adjustment that will use during open Loop Power control.Here, base station 704 can generate this message based on its any interference variations that observes (for example, via disturbing determiner parts 710).For example, if parts 710 detect and disturb to increase, then base station 704 (for example, power controller 712) can generate the message that comprises the indication that is used to increase transmitted power.On the contrary, reduce if parts 710 detect to disturb, then this message can comprise the indication that is used to reduce transmitted power.In a kind of typical case implements, base station 704 can (for example, change as long as base station 704 observes to disturb) on the repetition basis will comprise that the message that power control is indicated sends to subscriber station 702.
Shown in square frame 206, subscriber station 702 determines will be used for calculating the open loop power equation parameters of transmitted power.In some implementations, power equation adopts the form of equation 1:
P＝L+C/N+NI-10log
10(R)+Offset_SS
perSS+Offset_BS
perSS (1)
Be concise and to the point description below to the parameter of equation 1.P is to be the transmission power level of unit with dBm.L is the forward link path loss estimation of path loss (for example, to).C/N is used for the carrier wave of selected encoding scheme (for example, selected modulation/FEC speed) and the skew of noise.NI is that the noise at the place, base station is the estimated average power level of unit with disturbing with dBm.NI is broadcast to its related subscriber station (for example, broadcasting via DCD message) repeatedly by base station 704.R is repetition rate (for example, at selected modulation/FEC speed).Offset_SS
PerSSBe the offset parameter that provides of subscriber station 702 (for example, the error of seeing according to subscriber station 702 adjust parameter).Offset_BS
Per, SSIt is the offset parameter of safeguarding in the information that the subscriber station place provides based on base station 704.Offset_BS for example
PerSSValue can the representative of consumer station in conjunction with add up (for example, the defining) of all power control commands that the reception of various power control messages is collected as 802.16 standards.As hereinafter will more specifically discussing, this offset parameter can be at least in part based on the power control indication that receives at square frame 204 places.
Shown in square frame 208, subscriber station 702 (for example, the power controller parts 714) can be in the transmitted power that repeats to be identified for based on power equation on the basis reverse link.For example, as long as subscriber station 702 704 receives power control messages (for example, square frame 204) it just can recomputate transmitted power from the base station.In addition, as will more specifically discussing in conjunction with Fig. 3, subscriber station 702 can repeat to be determined to the communication channel change (for example, square frame 206) in time that the path loss of base station 704 is associated with solution.In this case, as long as subscriber station 702 detects path loss variation, subscriber station 702 just can correspondingly be adjusted its transmitted power.
In certain aspects, the operation of Fig. 2 has advantageously provided power control scheme, and wherein open loop and close loop maneuver are worked together so that more effective power control to be provided.Here, the subscriber station of operating in open loop mode can consider again that simultaneously the interference variations (for example, closed-loop information) that the base station observes adjusts its transmitted power based on its condition that observes (for example, the path loss of current estimation).
Can stipulate that (for example, adjusting) is used for the path loss parameter of power equation in various manners and based on one or more factor.Some examples of these factors will be described in conjunction with Fig. 3.
Shown in square frame 302, at point sometime, subscriber station 702 will begin to determine that (for example, upgrade or obtain) is used for the equational parameter of open loop power.In a kind of typical case implements, subscriber station 702 will repeat to carry out these operations on the basis.For example, in certain embodiments, subscriber station 702 can be determined power equation parameters (for example, estimating path loss) termly.In certain embodiments, as long as subscriber station 702 704 receives corresponding message (for example, power control indication) it just can determine power equation parameters from the base station.In certain embodiments, it just can determine power equation parameters as long as subscriber station 702 sends data (for example, each frame).
In certain aspects, suppose that for the purpose of power equation forward link path loss and reverse link path loss are basic identical.In other words, can determine (for example, estimating) path loss based on the reciprocity of hypothesis between the channel condition (for example, path loss) of forward direction and reverse link.Thereby shown in square frame 304, subscriber station 702 (for example, path loss estimator 716) can be estimated the path loss on the forward link.For example, this process can relate to the power level (for example, power spectral density) of the signal that measurement receives by receiver 706 and the power level of this power level with base station 704 these signals of transmission compared.For this reason, subscriber station 702 can be configured to obtain the relevant information of transmitted power that is used for sending this signal with base station 704.For example, the transmission power level that base station 704 is used for some signal can be known, and perhaps base station 704 can send the message that comprises this power level information to subscriber station 702.
Can estimate forward link path loss based on the various types of signals that receive on the forward link.For example in some implementations, subscriber station 702 will based on the forward link from the base station 704 control signals that receive estimate forward link path loss.
Shown in square frame 306, in some implementations, subscriber station 702 (for example, estimator 716) can come estimating path loss based on the antenna configurations of base station 704 and subscriber station 702.Here, subscriber station 702 can consider can use at forward direction and reverse link in some cases the transmission and the reception antenna of different numbers.For example, on the forward link, base station 704 can use an antenna (and some precoding and wave beam formation) to send, and subscriber station 702 uses two antennas to receive (utilizing the MRC/MMSE combination).Yet on reverse link, subscriber station 702 can use an antenna to send, and base station 704 can use an antenna to receive.Under these circumstances, subscriber station can adaptive (for example, increasing) be estimated the path loss of forward link, so that the more accurate estimation to reverse link path loss to be provided.
In some implementations, can use calibration process to adjust path loss based on the different qualities of the transceiver that uses in forward direction and the reverse link estimates.For example, can use the self-calibration process or the calibration process of eating dishes without rice or wine here.
Shown in square frame 308, in some implementations, subscriber station 702 can be adjusted the estimation of the path loss instantaneous change with the big change of attempting to alleviate estimated path loss and/or estimated path loss.In certain aspects, can use filtering technique (for example, filter part 718) to realize these operations.Under some circumstances, subscriber station 702 can use the filter (for example, bank of filters) with relative length to eliminate the change suddenly in the estimation of path loss.For example, (for example there is big relatively change in initial estimation to path loss, big change based on the received power on the forward link) under the situation, what filter can cause the current path loss parameter that is used for power equation (for example, increases progressively) change gradually.In this case, the value of path loss parameter can finally " be caught up with " the change value to the initial estimation of path loss.On the contrary, have in the initial estimation to path loss under the situation of instantaneous change, filter effect can not cause the change of path loss parameter or cause the change of path loss parameter to reduce.
Shown in square frame 310, in some implementations, subscriber station 702 (for example, estimator 716) can be estimated based on the prescribed path loss of moving of subscriber station 702.For example, at subscriber station 702 relatively fast and/or under the situation that certain party moves up, current estimation to path loss may be only in short time period accurately.Therefore may wish the change and the estimation of adaptive new path loss of subscriber station 702 track path loss quickly in these cases.
This can realize by using different (for example, length is shorter) filters in some implementations.Thereby subscriber station 702 can be configured to change based on the movement velocity of subscriber station 702 and/or direction the filter (for example, switching filter) of its current use.
Subscriber station 702 can be measured mobile with multiple mode.For example in some implementations, subscriber station 702 can comprise the location/motion detector member 720 (for example, accelerometer, GPS receiver etc.) of the motion of subscriber station 702 being followed the tracks of the change of current location (for example, based on).
Shown in square frame 312, in certain embodiments, subscriber station 702 (for example, estimator 716) can come the prescribed path loss to estimate based on the position (for example, being determined by location/motion detector 720) of subscriber station 702.For example, near the edge of subscriber station 702, when (for example, near the edge of the overlay area of the sector that is associated with base station 704), may wish to limit transmitted power to avoid interference the wireless device in the neighbor cell (perhaps sector) in the sub-district.Therefore, under some circumstances, although the increase of path loss may require to increase reverse link transmit power, subscriber station 702 can provide the probability that will disturb neighbouring device to the estimation of the minimizing of path loss with minimizing subscriber station 702.
In certain aspects, subscriber station 702 can by estimate some near the path loss of wireless devices determine its position or obtain information about its position.For example, subscriber station 702 can be estimated from the path loss of the equipment in the adjacent sectors and from the path loss of its oneself sector (for example, from base station 704).Here, are similar (for example) if subscriber station 702 is determined these path losses because subscriber station is near cell edge, then subscriber station 702 can be adjusted its initial path loss estimation at power equation.On the contrary, if be higher than the path loss (for example, because subscriber station 702 relatively near base station 704) of the sector of subscriber station 702 to the path loss of adjacent sectors, then subscriber station 702 can just use the initial path loss to estimate in power equation.
Shown in square frame 314, in case subscriber station 702 obtains its final estimation to path loss as mentioned above, then subscriber station 702 uses this value to determine the open loop transmitted power as reverse link path loss and other power equation parameters.Should be appreciated that more discussed above adaptively can be used for adaptive other parameter of some that are associated with power equation.For example, should reduce under the situation of transmitted power definite, subscriber station can reduce the parameter except path loss or can just reduce the power level that obtains according to power equation.
Referring now to Fig. 4, for being provided, power control indication can begin some operations of carrying out at square frame 402 with describing base station 704.In a kind of typical case implements, base station 704 will repeat to carry out these operations on the basis.For example in certain embodiments, it just can generate indication as long as base station 704 detects interference variations.In this case, can limit this process to prevent carrying out this operation too continually with a certain mode.In certain embodiments, when base station 704 each transmission data (for example, each frame) or expection received data, it can generate indication.In certain embodiments, base station 704 can regularly generate indication.
Shown in square frame 404, base station 704 is configured to determine whether it stands any interference, and if like this, then determines the degree of this interference.For example in certain embodiments, the receiver components 722 of transceiver 724 can monitor the interference signal (for example, as discussed above like that on the repetition basis) of given channel.In addition, in certain embodiments, base station 704 can use indirect mode (for example, based on receiving data error rate) to estimate to disturb.
In certain aspects, base station 704 (for example, disturbing determiner 710) can determine whether 704 interference that observe change with respect to the interference that had before observed in the base station.For example, disturb determiner 710 can generate the NI parameter indication of value (for example, power level) to the base station 704 current interference that observe at some preset time.Then, disturb determiner 710 can continue to monitor the value of the up-to-date NI parameter that generates with respect to base station 704 with the value of the interference determining to observe and/or indicate whether to have any variation with respect to the previous power control that base station 704 sends.
Shown in square frame 406, base station 704 can generate indication, and this indication relates at square frame 404 places whether interference variations has been arranged.For example under vicissitudinous situation, power controller 712 can generate indication based on the degree of interference variations, the change that increases progressively of transmit power offset parameter is specified in this indication, perhaps power controller 712 can generate indication based on the variation of the interference that observes, and new transmit power offset parameter is specified in this indication.Therefore in the previous case, base station 704 can generate power control indication, wherein can use this to indicate to increase or reduces and be used for the equational skew of open loop power (for example, Offset_BS in the subscriber station maintenance
PerSS), and under latter event, the base station can only provide skew (for example, the Offset_BS that is used by subscriber station in the open loop power equation
PerSS) new numerical value.
Shown in square frame 408, base station 704 can generate power control indication based on service quality that is associated with subscriber station 702 or HARQ.For example, if high relatively service quality is distributed to one or more Business Stream that is associated with subscriber station 702, then power controller 712 can be specified bigger value for power control indication.Similarly, if HARQ terminating point designated packet will end at subscriber station 702 relatively soon, then power controller 712 can be the bigger value of power control indication regulation.As the object lesson of foregoing, increase in response to disturbing, relative with Best-Effort service, can specify the power control of greater amount value for speech business and indicate.Here should be appreciated that base station 704 can be based on determining the service quality or the HARQ that are associated with subscriber station 702 in base station 704 with the communication between the subscriber station 702.
Shown in square frame 410, base station 704 can be based on generating power control indication at the reception antenna number at 704 places, base station and/or the gain of each antenna in these antenna.For example, if with use two or more antennas relative, if use a reception antenna, then power controller 712 can be the different value of power control indication regulation.Similarly, with relative when using higher antenna gain, when utilizing lower antenna gain, power controller 712 can be the different value of power control indication regulation.
Shown in square frame 412, base station 704 (for example, transmitter components 726) send to subscriber station 702 with indication.Message from base station 704 can adopt various ways.In some implementations, this message can comprise the special power control messages.In some implementations, can use the non-power specific messages that power control indication is sent together with out of Memory.In certain aspects, this message can comprise that concrete direction is the unicast messages (for example, via information unit) of subscriber station 702.As indicated above, in certain aspects, this message can comprise that appointment is used for the equational Offset_BS of open loop power
PerSSThe information of parameter or can comprise the information that is used for changing this parameter.
Referring now to Fig. 5, will describe now and between closed power control and open Loop Power control, change the exemplary operation that is associated.Described base station 704 and the subscriber station 702 of operating in begins after interrelated shown in square frame 502.Shown in square frame 504, closed power control can be the acquiescence power control mode.Yet at point sometime, open Loop Power control (square frame 506) can be selected to initiate to switch in base station 704.For example, can select the open Loop Power control pattern to reduce and 704 expenses that are associated to subscriber station 702 transmission power control message from the base station.The exemplary operation that is associated with open Loop Power control is described below in conjunction with square frame 518-526.
The exemplary operation that is associated with closed power control has been described at square frame 508-516 place.Shown in square frame 508, base station 704 monitors the condition at 704 places in the base station, such as the interference that observes.Under the situation that condition changes (square frame 510), base station 704 (for example, power controller 712) can determine whether and with what degree change be used for the transmitted power (square frame 512) of reverse link.At square frame 514 places, power control command transmitting can be delivered to subscriber station 702 in base station 704 therefore.Here, power control command can specify increasing progressively of transmitted power to increase or reduce (for example, using the value as the unit appointment with dB).In response to this message, subscriber station 702 is adjusted its transmitted power that is used for reverse link (square frame 516) according to specified amount.Can repeat aforesaid operations then until switching to open Loop Power control.
Referring now to the open Loop Power control operation, shown in square frame 518 and 520, the message that subscriber station 702 can receive in response to the base station 704 from association begins open Loop Power control.Shown in square frame 522, subscriber station 702 can obtain as discussed herein and be used for the equational parameter of open loop power.
When closed loop switches to open loop, can take measures to prevent the big relatively change of reverse link transmit power.For example, power controller 714 can be given for the initial parameter (for example, L, NI, skew) of power equation, and the transmitted power that obtains is basic identical with last transmitted power used in closed loop mode.In some instances, this can for example realize by one or more parameter being weighted (for example, interim).
Shown in square frame 524, subscriber station 702 can be determined transmitted power and use specified power level to be used for its rl transmission based on power equation as discussed herein.Shown in square frame 526, can repeat above-mentioned open loop operation until switching to closed power control.Here, can activate switching by message (for example, similar) and get back to closed loop mode to the message at square frame 518 places from base station 704.
With reference to Fig. 6, in some implementations, can take measures with the power control operation of keeping base station 704 and subscriber station 702 synchronously.For example, as discussed herein, base station 704 can send following message, and these message informing subscriber stations 702 incrementally change its transmitted power.Yet if subscriber station 702 does not receive one or more message in these message, the power control operation of base station 704 and subscriber station 702 may be no longer synchronous.In other words, base station 704 may send with a certain power level at desired user station 702, and subscriber station 702 determines that it should send with another power level.
Fig. 6 shows and can be used for keeping (for example, keeping or recovery) this synchronous some exemplary operations.At square frame 602 places, subscriber station 702 (for example, transmitter components 728) can be to base station 704 transmission information, the current transmitted power that this information indication subscriber station 702 uses on reverse link.704 places in the base station, the message that comprises this information is received by receiver 722 and can be provided for isochronous controller 730.Here, isochronous controller 730 can compare (square frame 604) with the expection power level with the power information that is received.Shown in square frame 606, under the situation of these values different (for example, difference is greater than the increments of regulation), power controller 712 (for example can be stipulated, adaptive) power control indication with keep (for example, recapturing) synchronously and the indication that will revise send to subscriber station 702 (square frame 608).Base station 704 and subscriber station 702 can carry out the operation of Fig. 6 to attempt holding power control synchronously on the basis of rule (regularly).
Can dispose as the wireless communication system of being instructed here to provide such as various types of Content of Communication such as voice, data.Such system can comprise and can support multi-address system with a plurality of telex networks by sharing free system resources (for example, bandwidth and transmitted power).The example of this multi-address system comprises code division multiple access (" CDMA ") system, time division multiple access (" TDMA ") system, frequency division multiple access (" FDMA ") system, 3GPP LTE system, OFDM (" OFDMA ") system etc.
Wireless multiple-access communication system can be supported the communication of a plurality of wireless terminals simultaneously.As mentioned above, each terminal can be come and one or more base station communication via the transmission on forward direction and the reverse link.Forward link (perhaps down link) refers to the communication link from the base station to the terminal, and reverse link (up link) is meant the communication link from terminal to base station.Can set up this communication link via the single output of single input, the single output of many inputs or multiple-input and multiple-output (" MIMO ") system.
A plurality of (the N of mimo system utilization
TIndividual) transmitting antenna and a plurality of (N
RIndividual) reception antenna is used for data and sends.By N
TIndividual transmitting antenna and N
RThe mimo channel that individual reception antenna forms can resolve into N
SIndividual independent channel, it is also referred to as space channel, wherein N
S≤ min{N
T, N
R.N
SEach channel in the individual independent channel is corresponding to a dimension.If utilize the additional dimension of being set up by a plurality of transmissions and reception antenna, then mimo system can provide improved performance (for example, more high-throughput and/or bigger reliability).
Mimo system can be supported time division duplex (" TDD ") and Frequency Division Duplexing (FDD) (" FDD ").In the TDD system, forward direction and rl transmission make that reciprocity principle allows to estimate forward link channel according to reverse chain channel in the same frequency district.This makes that but the transmission wave beam that access point can extract on the forward link forms gain when at the access point place there being a plurality of antenna time spent.
The instruction here can be incorporated a kind of the utilization in the equipment that various parts come and at least one other wireless device communicates into.Fig. 8 has described can be used for helping some example components of communication between devices.Particularly, Fig. 8 shows the equipment 810 (for example, access point) and the equipment 850 (for example, accessing terminal) of mimo system 800.At equipment 810 places, the business datum that will be used for a plurality of data flow offers transmission (" TX ") data processor 814 from data source 812.
In certain aspects, the transmitting antenna of each data flow by separately sends.TX data processor 814 is based upon the specific coding scheme of each data flow selection and comes the business datum of this data flow is formatd, encodes and interweaves so that coded data to be provided.
Can use the OFDM technology that the coded data and the pilot data of each data flow is multiplexing.The known data patterns that pilot data is normally handled in a known way and can be used for estimating channel response at the receiver system place.Then, the certain modulation schemes (for example, BPSK, QSPK, M-PSK or M-QAM) that is based upon each data flow selection is provided by the multiplexing pilot tone and the encoded modulation symbol that provides according to this of process of (that is sign map) this data flow.Can be identified for data rate, coding and the modulation of each data flow by the instruction of carrying out by processor 830.Data storage 832 can storage of processor 830 or the employed program code of other parts, data and the out of Memory of equipment 810.
Then, the modulation symbol of all data flow is offered TX MIMO processor 820, this processor can further be handled modulation symbol (for example, at OFDM).Then, TX MIMO processor 820 is with N
TIndividual stream of modulation symbols offers N
TIndividual transceiver (" XCVR ") 822A to 822T.In certain embodiments, TX MIMO processor 820 forms the antenna that weighting is applied to the symbol of data flow and sends these symbols with wave beam.
The symbols streams that each transceiver 822 receives and handles separately is adapted to pass through the modulated signal that mimo channel sends one or more analog signal to be provided and further to regulate (for example, amplification, filtering and up-conversion) analog signal to provide.Then respectively from N
TIndividual antenna 824A to 824T sends the N from transceiver 822A to 822T
TIndividual modulated signal.
At equipment 850 places, the modulated signal that is sent is by N
RIndividual antenna 852A to 852R receives, and will offer transceiver (" XCVR ") 854A to 854R separately from the received signal of each antenna 852.Each transceiver 854 regulate (for example, filtering, amplification and down-conversion) separately received signal, will be signal digitalized sampling to be provided and further to handle sampling so that corresponding " reception " symbols streams to be provided through what overregulate.
Then, receiving (" RX ") data processor 860 receives and handles from N based on specific receiver treatment technology
RThe N of individual transceiver 854
RIndividual receiving symbol stream is to provide N
TIndividual " detection " symbols streams.RX data processor 860 carries out demodulation, deinterleaving and the decoding business datum with restore data stream to each detected symbols streams then.The processing of RX data processor 860 is opposite with the processing of carrying out at the TX MIMO at equipment 810 places processor 820 and TX data processor 814.
Reverse link message can comprise the various types of information relevant with the data flow of communication link and/or reception.Then, this reverse link message is handled, is modulated, regulated and be sent back to equipment 810 by transceiver 854A to 854R by modulator 880 by TX data processor 838, and wherein TX data processor 838 also receives the business datum of a plurality of data flow from data source 836.
At equipment 810 places, handle the reverse link message that sends by equipment 850 to extract by antenna 824 receptions, by transceiver 822 adjustings, by demodulator (" DEMOD ") 840 demodulation and by RX data processor 842 from the modulated signal of equipment 850.Then, which pre-coding matrix processor 830 determines to use be used for determining that wave beam forms weights, then the message of extracting is handled.
Fig. 8 also illustrate communication component can comprise such as here instruction ground one or more parts of carrying out the power control operation.For example, power control unit 890 can with other parts co-operation of processor 830 and/or equipment 810 so that as instructing here to/from another equipment (for example, equipment 850) transmission/received signal.Similarly, power control unit 892 can with other parts co-operation of processor 870 and/or equipment 850 so as to/from another equipment (for example, equipment 810) transmission/received signal.Should be appreciated that for each equipment 810 and 850 two or how described functions of components can be provided by single parts.For example, single processing unit can provide the function of power control unit 890 and processor 830, and single processing unit can provide the function of power control unit 892 and processor 870.
The instruction here can be incorporated in the multiple device (for example, equipment) (for example, in these devices enforcement or carried out by these devices) into.For example, some wireless devices can be configured to or be called base station (" BS "), access point (" AP "), Node B, radio network controller (" RNC "), enode b, base station controller (" BSC "), base transceiver station (" BTS "), transceiver function (" TF "), radio router, wireless set, Basic Service Set (" BSS "), extended service set (" ESS "), radio base station (" RBS ") or some other terms.Other wireless device (for example, wireless terminal) can be called subscriber station.Subscriber station also can be called subscriber unit, mobile radio station, distant station, remote terminal, accesses terminal, user terminal, user agent, user's set or subscriber equipment.In some implementations, subscriber station can comprise that cell phone, cordless telephone, Session initiation Protocol (" SIP ") phone, wireless local loop (" WLL ") are stood, personal digital assistant (" PDA "), have the handheld device of wireless connections ability or be connected to some other suitable treatment facilities of radio modem.Thereby, here one of instruction or many-sidedly (for example can incorporate phone into, cell phone or smart phone), computer (for example, laptop computer), portable communication device, portable computing equipment are (for example, personal digital assistant), in amusement equipment (for example, music or video equipment or satelline radio), global positioning system equipment or any other suitable equipment of being configured to communicate by letter via wireless medium.
As mentioned above, in certain aspects, wireless device can comprise the access device (for example, honeycomb, Wi-Fi or WiMAX access point) that is used for communication system.For example, this access device can be provided for or the connectedness of leading to network (for example, wide area network is such as internet or cellular network) via wired or wireless communication link.Thereby access device can make another equipment (for example, Wi-Fi or WiMAX station) can access network or certain other function.
Wireless device can via based on or support one or more wireless communication link of any suitable wireless communication technology to communicate by letter.For example, in certain aspects, wireless device can be associated with network.In certain aspects, this network can comprise local area network (LAN) or wide area network.One or more in various wireless communication technology, agreement or the standard can be supported or use to wireless device, and these wireless communication technologys, agreement or standard be CDMA, TDMA, OFDM, OFDMA, WMAX and Wi-Fi for example.Similarly, one or more in multiple corresponding modulation or the multiplexing scheme can be supported or use to wireless device.Therefore, wireless device can comprise suitable parts (for example, air interface), so that set up one or more wireless communication link and communicate by letter via this one or more wireless communication link with above-mentioned or other wireless communication technology.For example, equipment can comprise (for example having the transmitter and receiver parts that are associated, transmitter 726 and 728 and receiver 706 and 722) transceiver, these parts can include and help the various parts (for example, signal generator and signal processor) that communicate by wireless medium.
Can implement parts described herein in various manners.With reference to Fig. 9, will install 902 and 904 and be expressed as a series of interrelated functional blocks.In certain aspects, the function of these pieces can be embodied as the treatment system that comprises one or more processor parts.In certain aspects, (for example, at least a portion in ASIC) is implemented the function of these pieces can to use one or more integrated circuit for example.As discussed herein, integrated circuit can comprise processor, software, other relevant parts or its some combinations.Also can implement the function of these pieces with some alternate manners as discussed herein.In certain aspects, one or more in the dashed rectangle among Fig. 9 is optional.
Should be appreciated that and use here such as any quantity or order that does not generally limit those unit of quoting of appellations such as " first ", " second " to the unit.In fact, these appellations here can be as two of a kind of differences or the facilitated method of multiple unit or unit example more.Therefore, quoting and not meaning that and only can use two unit or the first module must be herein Unit first and second in a certain mode prior to Unit second.Unless otherwise, one group of unit also can comprise one or more unit.
It will be understood by those skilled in the art that and to use multiple different technologies and means to come representative information and signal.For example, data, instruction, order, information, signal, bit, symbol and the chip of quoting in the whole text in above describing can be represented by voltage, electric current, electromagnetic wave, magnetic field or particle, light field or particle or its any combination.
Those skilled in the art also will understand, arbitrary logical block, module, processor, device, circuit and algorithm steps in various example logic pieces, module, processor, device, circuit and the algorithm steps of describing in conjunction with aspect disclosed herein may be embodied as electronic hardware (for example, the numeral that can use source code or some other means to design is implemented, simulation is implemented or the combination of the two), incorporates various forms of programs or the design code (can be called " software " or " software module " for simplicity's sake here) or the combination of the two of instruction into.For this interchangeability of hardware and software clearly is described, above mainly it is described in the function aspects of various exemplary components, piece, module, circuit and step.It still is the design constraint that software depends on application-specific and whole system is applied that these functions are embodied as hardware.Those skilled in the art can implement described function by different way at each application-specific, but such implementation decision should not be construed as the scope that breaks away from present disclosure that causes.
Can integrated circuit (" IC "), access terminal or access point in implement or by integrated circuit (" IC "), access terminal or access point is carried out in conjunction with described various example logic pieces, module and circuit aspect disclosed herein.IC can comprise general processor, digital signal processor (DSP), application-specific integrated circuit (ASIC) (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, electronic unit, optics, mechanical part or its any combination that is designed to realize function described here, and IC can executive resident in IC, outside the IC or code inside and outside the IC or instruction.General processor can be microprocessor, but replacedly, processor can be any conventional processors, controller, microcontroller or state machine.Processor also may be embodied as the combination of computing equipment, for example combination of DSP and microprocessor, a plurality of microprocessor, the one or more microprocessors that combine with the DSP kernel or any other such configuration.
Should be appreciated that any concrete steps order or level in any disclosed process are the examples of exemplary approach.Should be appreciated that based on design preference and can rearrange the concrete order of the step in the process or level and still in the scope of present disclosure.Appended claim to a method presents the key element of each step with exemplary series and the concrete order or the level that are not intended to be limited to be presented.
In one or more exemplary embodiment, can implement described function with hardware, software, firmware or its any combination.If use software implementation, then function can be used as one or more instruction or code storage transmits on computer-readable medium or by computer-readable medium.Computer-readable medium comprises computer-readable storage medium and communication media, and this communication media includes any medium that helps computer program is sent to from the three unities another place.Storage medium can be can be by any usable medium of calculator visit.For example and nonrestrictive, this computer-readable medium can comprise RAM, ROM, EPROM, EEPROM, CD-ROM, flash memory, register or other disc storage unit, disc storage unit or other magnetic storage apparatus or can be used for carrying or the required program code of store instruction or data structure form and can be by any other medium of computer access.In addition, any connection also suitably is called computer-readable medium.For example, if use coaxial cable, optical fiber cable, twisted-pair feeder, Digital Subscriber Line (DSL) or such as the wireless technology of infrared ray, radio and microwave from the website, server or other remote source send software, then comprises coaxial cable, optical fiber cable, twisted-pair feeder, DSL or such as the wireless technology of infrared ray, radio and microwave in the definition of medium.As used herein, disk and CD comprise compact disk (CD), laser disk, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc, and wherein disk reproduces data with magnetic means usually, and CD reproduces data with laser with optical mode.The combination of foregoing also should be included in the scope of computer-readable medium.Generally, be to be understood that computer-readable medium can be embodied in any suitable computer program.
The front provides the description to open aspect, so that those skilled in the art can realize or use present disclosure.To those skilled in the art, be conspicuous to the various modifications of these aspects, and the general principle of definition here go for others and does not break away from the scope of present disclosure.Therefore, aspect shown in present disclosure is not intended to be limited to here but consistent with the widest scope of principle disclosed herein and novel feature.
Claims (65)
1, a kind of Poewr control method that is used for radio communication comprises:
The path loss that estimation and reception link are associated;
Receive the power control indication of reflection interference variations; And
Be identified for sending the transmitted power of link based on estimated path loss and the power control indication that is received.
2, method according to claim 1, wherein:
Described reception link comprises the forward link from the base station to the subscriber station; And
Described transmission link comprises the reverse link from described subscriber station to described base station.
3, method according to claim 2 wherein, is determined to be associated with open Loop Power control to the described of transmitted power.
4, method according to claim 3, wherein, the power that received control indication comprises at least one in the group that is made of the following: closed power control messages, unicast messages and be used for regulation Offset_BS
PerSSInformation.
5, method according to claim 3, wherein, described interference variations is with respect to the noise that receives from described base station and disturbs indication.
6, method according to claim 3, wherein, the power that received control indication comes specified power to change based at least one item in the group that is made of the following: the interference that observes at place, described base station, the service quality that is associated with described subscriber station, the HARQ that is associated with described subscriber station, reception antenna quantity, the gain that is associated with at least one reception antenna.
7, method according to claim 3 wherein, is determined also based on carrier wave and the skew of noise code scheme, the noise that receives from described base station and interference indication and repetition rate the described of transmitted power.
8, method according to claim 2 wherein, comprises the described estimation of path loss and to determine and the signal power level that is associated from the control messages of described base station reception via described forward link.
9, method according to claim 2, wherein, to the described estimation of path loss antenna configurations based on described forward link and described reverse link.
10, method according to claim 2 wherein, will be carried out filtering to alleviate big and/or instantaneous change to the change in the described estimation of path loss.
11, method according to claim 2, wherein, to described estimation the moving of path loss based on described subscriber station.
12, method according to claim 2, wherein, to the described estimation of path loss position based on described subscriber station.
13, method according to claim 2 also comprises: send the message of the determined transmitted power of indication, and synchronous with the transmission power level that maintains between described base station and the described subscriber station.
14, method according to claim 1, wherein, use power control equations formula in described transmitted power described determined, described method also comprises: when at least one parameter of adaptive described power control equations formula when the closed power control model switches to the open Loop Power control pattern, make that the transmitted power after described mode switch is basic identical with the transmitted power before described mode switch.
15, a kind of device that is used for the control of radio communication power comprises:
Path loss estimator is used to estimate and receives the path loss that link is associated;
Receiver is used to receive the power control indication of reflection interference variations; And
Power controller is used for indicating the transmitted power that is identified for sending link based on estimated path loss and the power control that is received.
16, device according to claim 15, wherein:
Described reception link comprises the forward link from the base station to the subscriber station; And
Described transmission link comprises the reverse link from described subscriber station to described base station.
17, device according to claim 16 wherein, is determined to be associated with open Loop Power control to the described of transmitted power.
18, device according to claim 17, wherein, the power that received control indication comprises at least one in the group that is made of the following: closed power control messages, unicast messages and be used for regulation Offset_BS
PerSSInformation.
19, device according to claim 17, wherein, described interference variations is with respect to the noise that receives from described base station and disturbs indication.
20, device according to claim 17, wherein, the power that received control indication comes specified power to change based at least one item in the group that is made of the following: the interference that observes at place, described base station, the service quality that is associated with described subscriber station, the HARQ that is associated with described subscriber station, reception antenna quantity, the gain that is associated with at least one reception antenna.
21, device according to claim 17, wherein, described power controller also is used for based on carrier wave and the skew of noise code scheme, the noise that receives from described base station and disturbs indication and repetition rate to determine described transmitted power.
22, device according to claim 16, wherein, described path loss estimator also is used for estimating described path loss by definite signal power level that is associated with the control messages that receives from described base station via described forward link.
23, device according to claim 16, wherein, described path loss estimator also is used for estimating described path loss based on the antenna configurations of described forward link and described reverse link.
24, device according to claim 16, wherein, described path loss estimator also is used for the change to the described estimation of path loss is carried out filtering to alleviate big and/or instantaneous change.
25, device according to claim 16, wherein, described path loss estimator also is used for estimating described path loss based on moving of described subscriber station.
26, device according to claim 16, wherein, described path loss estimator also is used to count based on the position of described subscriber station estimates described path loss.
27, device according to claim 16 also comprises: transmitter, be used to send the message of indicating determined transmitted power, and synchronous with the transmission power level that maintains between described base station and the described subscriber station.
28, device according to claim 15, wherein, described power controller also is used for:
Determine described transmitted power based on the power control equations formula; And
When at least one parameter of adaptive described power control equations formula when the closed power control model switches to the open Loop Power control pattern, make that the transmitted power after described mode switch is basic identical with the transmitted power before described mode switch.
29, a kind of device that is used for the control of radio communication power comprises:
Be used to estimate and the module that receives the path loss that link is associated;
Be used to receive the module of the power control indication that reflects interference variations; And
Be used for being identified for sending the module of the transmitted power of link based on estimated path loss and the power that received control indication.
30, device according to claim 29, wherein:
Described reception link comprises the forward link from the base station to the subscriber station; And
Described transmission link comprises the reverse link from described subscriber station to described base station.
31, device according to claim 30 wherein, is determined to be associated with open Loop Power control to the described of transmitted power.
32, device according to claim 31, wherein, the power that received control indication comprises at least one in the group that is made of the following: closed power control messages, unicast messages and be used for regulation Offset_BS
PerSSInformation.
33, device according to claim 31, wherein, described interference variations is with respect to the noise that receives from described base station and disturbs indication.
34, device according to claim 31, wherein, the power that received control indication comes specified power to change based at least one item in the group that is made of the following: the interference that observes at place, described base station, the service quality that is associated with described subscriber station, the HARQ that is associated with described subscriber station, reception antenna quantity, the gain that is associated with at least one reception antenna.
35, device according to claim 31, wherein, the described module that is used to determine is based on carrier wave and the skew of noise code scheme, the noise that receives from described base station and disturb indication and repetition rate to determine described transmitted power.
36, device according to claim 30, wherein, the described module that is used to estimate is estimated described path loss by determining the signal power level that is associated with the control messages that receives from described base station via described forward link.
37, device according to claim 30, wherein, the described module that is used to estimate is estimated described path loss based on the antenna configurations of described forward link and described reverse link.
38, device according to claim 30, wherein, the described module that is used for estimating will be carried out filtering to alleviate big and/or instantaneous change to the change of the described estimation of path loss.
39, device according to claim 30, wherein, the described module that is used to estimate is estimated described path loss based on moving of described subscriber station.
40, device according to claim 30, wherein, the described module that is used to estimate is estimated described path loss based on the position of described subscriber station.
41, device according to claim 30 also comprises: be used to send the message of the determined transmitted power of indication to maintain the synchronous module of transmission power level between described base station and the described subscriber station.
42, device according to claim 29, wherein, the described module that is used to determine:
Determine described transmitted power based on the power control equations formula; And
When at least one parameter of adaptive described power control equations formula when the closed power control model switches to the open Loop Power control pattern, make that the transmitted power after described mode switch is basic identical with the transmitted power before described mode switch.
43, a kind of computer program that is used for the control of radio communication power comprises:
Computer-readable medium comprises being used to make at least one computer to carry out the code of following operation:
The path loss that estimation and reception link are associated;
Receive the power control indication of reflection interference variations; And
Be identified for sending based on estimated path loss and the power control indication that is received
The transmitted power of link.
44, a kind of Poewr control method that is used for radio communication comprises:
Detection is in the interference variations at place, base station;
Generate power control indication based on described interference variations; And
When subscriber station uses open Loop Power control, described power control indication is sent to described subscriber station.
45, according to the described method of claim 44, wherein:
Described base station sends to described subscriber station via forward link with described power control indication; And
Described subscriber station uses described open Loop Power control to be identified for the transmitted power that sends to described base station via reverse link.
46,, wherein, determine described transmitted power based on described power control indication, carrier wave and the skew of noise code scheme, the noise that receives from described base station and interference indication and repetition rate according to the described method of claim 45.
47, according to the described method of claim 44, wherein, described interference variations is with respect to noise and interference indication by described base station broadcast.
48, according to the described method of claim 44, wherein, described power control indication comprises at least one in the group that is made of the following: closed power control messages, unicast messages and be used for regulation Offset_BS
PerSSThe information of parameter.
49, according to the described method of claim 44, wherein, to the generation of described power control indication also based at least one in the group that constitutes by the following: the interference that observes at place, described base station, the service quality that is associated with described subscriber station, the HARQ that is associated with described subscriber station, reception antenna quantity, the gain that is associated with at least one reception antenna.
50, according to the described method of claim 44, also comprise: the message that when using described open Loop Power control, receives the transmitted power of the described subscriber station of indication from described subscriber station, wherein, the generation to described power control indication also comprises: the transmission power level that maintains between described base station and the described subscriber station is synchronous.
51, a kind of device that is used for the control of radio communication power comprises:
Interference detector is used to detect the interference variations at the place, base station;
Power controller is used for generating power control indication based on described interference variations; And
Transmitter is used for when subscriber station uses open Loop Power control described power control indication being sent to described subscriber station.
52, according to the described device of claim 51, wherein:
Described base station sends to described subscriber station via forward link with described power control indication; And
Described subscriber station uses described open Loop Power control to be identified for the transmitted power that sends to described base station via reverse link.
53,, wherein, determine described transmitted power based on described power control indication, carrier wave and the skew of noise code scheme, the noise that receives from described base station and interference indication and repetition rate according to the described device of claim 52.
54, according to the described device of claim 51, wherein, described interference variations is with respect to noise and interference indication by described base station broadcast.
55, according to the described device of claim 51, wherein, described power control indication comprises at least one in the group that is made of the following: closed power control messages, unicast messages and be used for regulation Offset_BS
PerSSThe information of parameter.
56, according to the described device of claim 51, wherein, described power controller also is used for generating described power control indication based at least one item of the group that is made of the following: the interference that observes at place, described base station, the service quality that is associated with described subscriber station, the HARQ that is associated with described subscriber station, reception antenna quantity, the gain that is associated with at least one reception antenna.
57, according to the described device of claim 51, also comprise: receiver, be used for when using described open Loop Power control, receiving the message of the transmitted power of the described subscriber station of indication from described subscriber station, wherein, it is synchronous with the transmission power level that maintains between described base station and the described subscriber station that described power controller also is used to generate described power control indication.
58, a kind of device that is used for the control of radio communication power comprises:
Be used to detect module in the interference variations at place, base station;
Be used for generating the module of power control indication based on described interference variations; And
Be used for when subscriber station uses open Loop Power control, described power control indication being sent to the module of described subscriber station.
59, according to the described device of claim 58, wherein:
Described base station sends to described subscriber station via forward link with described power control indication; And
Described subscriber station uses described open Loop Power control to be identified for the transmitted power that sends to described base station via reverse link.
60,, wherein, determine described transmitted power based on described power control indication, carrier wave and the skew of noise code scheme, the noise that receives from described base station and interference indication and repetition rate according to the described device of claim 59.
61, according to the described device of claim 59, wherein, described interference variations is with respect to noise and interference indication by described base station broadcast.
62, according to the described device of claim 59, wherein, described power control indication comprises at least one in the group that is made of the following: closed power control messages, unicast messages and be used for regulation Offset_BS
PerSSThe information of parameter.
63, according to the described device of claim 59, wherein, the described module that is used for generating generates described power control indication based at least one item of the group that is made of the following: the interference that observes at place, described base station, the service quality that is associated with described subscriber station, the HARQ that is associated with described subscriber station, reception antenna quantity, the gain that is associated with at least one reception antenna.
64, according to the described device of claim 59, also comprise: the module that is used for when using described open Loop Power control, receiving the message of the transmitted power of indicating described subscriber station from described subscriber station, wherein, it is synchronous with the transmission power level that maintains between described base station and the described subscriber station that the described module that is used to generate generates described power control indication.
65, a kind of computer program that is used for the control of radio communication power, comprising: computer-readable medium comprises being used to make at least one computer to carry out the code of following operation:
Detection is in the interference variations at place, base station;
Generate power control indication based on described interference variations; And
When subscriber station uses open Loop Power control, described power control indication is sent to described subscriber station.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US89464707P | 2007-03-13 | 2007-03-13 | |
| US60/894,647 | 2007-03-13 | ||
| US12/021,571 | 2008-01-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101632238A true CN101632238A (en) | 2010-01-20 |
Family
ID=41576398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200880008099 Pending CN101632238A (en) | 2007-03-13 | 2008-03-13 | Power control method and apparatus |
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| CN (1) | CN101632238A (en) |
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| WO2012130017A1 (en) * | 2011-03-31 | 2012-10-04 | 北京新岸线无线技术有限公司 | Method and device for open loop uplink access power control |
| CN103517390A (en) * | 2012-06-19 | 2014-01-15 | 京信通信技术(广州)有限公司 | Power control method and device |
| CN104854833A (en) * | 2012-12-17 | 2015-08-19 | Zte维创通讯公司 | Tracking received power in wireless communications |
| WO2016058155A1 (en) * | 2014-10-16 | 2016-04-21 | 华为技术有限公司 | Communication method for wireless local area network, station point and communication system |
| CN105580448A (en) * | 2013-09-30 | 2016-05-11 | 索尼公司 | Communication control device, communication control method, terminal device, and information processing device |
| WO2019214443A1 (en) * | 2018-05-11 | 2019-11-14 | 中国移动通信有限公司研究院 | Power control method and apparatus, terminal, and network device |
| WO2020088366A1 (en) * | 2018-11-02 | 2020-05-07 | 华为技术有限公司 | Method and apparatus for determining transmit power |
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2008
- 2008-03-13 CN CN 200880008099 patent/CN101632238A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2012130017A1 (en) * | 2011-03-31 | 2012-10-04 | 北京新岸线无线技术有限公司 | Method and device for open loop uplink access power control |
| CN103517390A (en) * | 2012-06-19 | 2014-01-15 | 京信通信技术(广州)有限公司 | Power control method and device |
| CN103517390B (en) * | 2012-06-19 | 2017-03-22 | 京信通信技术(广州)有限公司 | Power control method and device |
| CN104854833A (en) * | 2012-12-17 | 2015-08-19 | Zte维创通讯公司 | Tracking received power in wireless communications |
| CN104854833B (en) * | 2012-12-17 | 2018-02-02 | Zte维创通讯公司 | Method, apparatus, program medium and the system of receiving power are followed the trail of in wireless communications |
| CN105580448A (en) * | 2013-09-30 | 2016-05-11 | 索尼公司 | Communication control device, communication control method, terminal device, and information processing device |
| CN105580448B (en) * | 2013-09-30 | 2020-05-19 | 索尼公司 | Communication control apparatus, communication control method, terminal apparatus, and information processing apparatus |
| WO2016058155A1 (en) * | 2014-10-16 | 2016-04-21 | 华为技术有限公司 | Communication method for wireless local area network, station point and communication system |
| WO2019214443A1 (en) * | 2018-05-11 | 2019-11-14 | 中国移动通信有限公司研究院 | Power control method and apparatus, terminal, and network device |
| CN110475327A (en) * | 2018-05-11 | 2019-11-19 | 中国移动通信有限公司研究院 | A kind of method, apparatus of power control, terminal and the network equipment |
| WO2020088366A1 (en) * | 2018-11-02 | 2020-05-07 | 华为技术有限公司 | Method and apparatus for determining transmit power |
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Application publication date: 20100120 |