CN102098138B - Method, device and system for processing feedback information of channel state - Google Patents
Method, device and system for processing feedback information of channel state Download PDFInfo
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Abstract
The embodiment of the invention discloses a method, a device and a system for processing feedback information of a channel state. The method for processing the feedback information of the channel state is used for a communication system using a multiple-input multiple-output technology and comprises the following steps of: transmitting a media access control (MAC) protocol data unit flow on an uplink physical service channel, wherein one or more MAC protocol data units in the MAC protocol data unit flow comprise the feedback information of the channel state information (CSI) of a downlink channel; and sending indication information, wherein the indication information indicates the positions of the one or more MAC protocol data units in the MAC protocol data unit flow. Compared with the mode that a terminal feeds an index number of a pre-coding codebook back to a base station through a pre-coding control indication field of a high speed-dedicated physical control channel (HS-DPCCH), the terminal can carry more information in the mode of carrying the feedback information in the MAC protocol data units.
Description
Technical field
The present invention relates to the communication technology, relate in particular to the methods, devices and systems of the feedback information of processing channel state.
Background technology
There is at present MIMO (Multiple-Input Multiple-Output, multiple-input, multiple-output) technology.Compare with the system of a use single antenna, one is all used the system of many antennas improving transmission ability at transmitting terminal and receiving terminal.MIMO technology can comprise Single User MIMO (Single-User MIMO, SU-MIMO) technology and multiuser MIMO (Multi-User MIMO, MU-MIMO) technology.Single User MIMO technology is a kind of technology of point-to-point, and wherein, what the mode of realization communication adopted is to distribute identical Radio Resource to unique user simultaneously.Multiuser MIMO technology is a kind of point-to-multipoint MIMO technology, and wherein, what the mode of realization communication adopted is to distribute identical Radio Resource to a plurality of users simultaneously.
General, mimo system can be divided into open loop MIMO system and closed-loop MIMO system.In closed-loop MIMO system, if transmitting terminal obtains CSI (Channel State Information, channel condition information) by feedback, can improve so the channel performance of mimo system.The information relevant with channel characteristics can be called CSI, for example, and instantaneous channel information, statistic channel information etc.In Single User MIMO system, due to directly feedback CSI expense larger, at present, Single User MIMO system quantizes to wait to CSI with precoding technique processes the rear precoding codebook (Codebook) that forms, and this precoding codebook is the set of precoding weighting matrix.From the code book that prelists, select best pre-coding matrix, and its call number corresponding in the code book that prelists is fed back to transmitting terminal, this process is called precoding and selects feedback.Adopt different selection criterions, pre-coding system performance is different.From feedback cycle, there are long period feedback and short period feedback two classes.Short period mainly utilizes the instantaneous channel information of channel to select pre-coding matrix, and long period feedback mainly utilizes the statistic channel information of channel to select pre-coding matrix.
At present, how existence is by the problem of multiuser MIMO technology introducing HSPA (High Speed Packet Access, high-speed packet access).If the precoding technique that adopts picture to use feeds back CSI, cannot meet the requirement of multiuser MIMO technology in Single User MIMO technology.
Summary of the invention
The embodiment of the present invention provides the methods, devices and systems of the feedback information of processing channel state.Adopted following technical scheme:
One aspect of the present invention provides the method for the feedback information of processing channel state, described method is for a kind of communication system of using multiple-input, multiple-output MIMO technology, described method comprises: in ascending physical signal Traffic Channel, send Medium Access Control (MAC) Protocol Data Unit stream, the feedback information of the channel status CSI that comprises down channel in one or more Medium Access Control (MAC) Protocol Data Unit in described Medium Access Control (MAC) Protocol Data Unit stream; Send indication information, the position of described one or more Medium Access Control (MAC) Protocol Data Unit of described indication information indication in described Medium Access Control (MAC) Protocol Data Unit stream.
The embodiment of the present invention is carried the feedback information of CSI by Medium Access Control (MAC) Protocol Data Unit, can carry more feedback information volume, and by indication information, indicate the position of described feedback information, can indicate accurately described feedback information, thereby raising channel performance, meets the requirement of MIMO technology.
The present invention also provides terminal on the other hand, described terminal is for a kind of communication system of using multiple-input, multiple-output MIMO technology, described terminal comprises: transmitting element, described transmitting element is used for: in ascending physical signal Traffic Channel, send Medium Access Control (MAC) Protocol Data Unit stream, the feedback information of the channel status CSI that comprises down channel in one or more Medium Access Control (MAC) Protocol Data Unit in described Medium Access Control (MAC) Protocol Data Unit stream; Send indication information, the position of described one or more Medium Access Control (MAC) Protocol Data Unit of described indication information indication in described Medium Access Control (MAC) Protocol Data Unit stream.
Through the PCI field feedback precoding codebook number of HS-DPCCH, compare to the mode of base station with existing terminal, the terminal that the embodiment of the present invention provides is by carrying the feedback information of CSI in the Medium Access Control (MAC) Protocol Data Unit sending, can carry more feedback information volume, and by indication information, indicate the position of described feedback information, can indicate accurately described feedback information, thereby improve the feedback efficiency of terminal to CSI, meet the requirement of MIMO technology.Another aspect of the invention provides base station, described base station is for a kind of communication system of using multiple-input, multiple-output MIMO technology, described base station comprises: receiving element, described receiving element is used for: in ascending physical signal Traffic Channel, receive Medium Access Control (MAC) Protocol Data Unit stream, the feedback information of the channel status CSI that comprises down channel in one or more Medium Access Control (MAC) Protocol Data Unit in described Medium Access Control (MAC) Protocol Data Unit stream; Receive indication information, the position of described one or more Medium Access Control (MAC) Protocol Data Unit of described indication information indication in described Medium Access Control (MAC) Protocol Data Unit stream; Feedback information acquiring unit, for obtaining described feedback information according to described indication information from described one or more Medium Access Control (MAC) Protocol Data Unit.
The base station that the embodiment of the present invention provides obtains the feedback information of CSI from Medium Access Control (MAC) Protocol Data Unit according to indication information, can accurately know the CSI of terminal, meets the requirement of MIMO technology.
Further aspect of the present invention provides communication system, and described communication system is used multiple-input, multiple-output MIMO technology, and described communication system comprises: terminal as above and base station as above.
The system that the embodiment of the present invention provides, more information, by utilizing Medium Access Control (MAC) Protocol Data Unit to carry the feedback information of CSI, can be carried in base station, and the CSI of terminal feedback can be known accurately by indication information in base station, meets the requirement of MIMO technology.
Accompanying drawing explanation
Fig. 1 has shown a kind of system schematic by way of example.
Fig. 2 has shown a kind of method schematic diagram of feedback information of processing channel state by way of example.
Fig. 3 has shown the method schematic diagram of the feedback information of another kind of processing channel state by way of example.
Fig. 4 has shown a kind of schematic diagram of mode of feedback information of the channel status that carries down channel in Medium Access Control (MAC) Protocol Data Unit stream by way of example.
Fig. 5 has shown a kind of schematic diagram that carries the mode of indication information in MAC protocol header unit by way of example.
Fig. 6 has shown the schematic diagram of the form of a kind of MAC protocol header unit by way of example.
Fig. 7 has shown a kind of schematic diagram that sends the mode of indication information by E-DPDCH by way of example.
Fig. 8 has shown a kind of form schematic diagram of the indication information sending at E-DPCCH by way of example.
Fig. 9 has shown the method schematic diagram of the feedback information of another processing channel state by way of example.
Figure 10 has shown a kind of cell schematics of terminal by way of example.
Figure 11 has shown a kind of cell schematics of base station by way of example.
Embodiment
Fig. 1 has shown a kind of schematic diagram of system 1000 by way of example, and this system 1000 comprises terminal 1010 and base station 1020.
In embodiments of the present invention, the downlink data transmission utilization that base station 1020 sends to terminal 1010 is HSDPA (High Speed Downlink Packet Access, the access of high-speed downstream bag) technology.
If system 1000 is the multi-user MIMO system based on HSDPA technology, also be that system 1000 is while comprising a plurality of terminal 1010, base station 1020 need to be to sending to the different data streams of different terminals 1010 to carry out precoding, then on different antennas, send to different terminal 1010, reduce the interference between antenna.Precoding algorithm under multiuser MIMO is more complicated compared with Single User MIMO.For example, in order to reduce the CCI (Co-Channel Interference, common-channel interference) that uses identical mimo channel to cause between a plurality of terminals 1010, base station 1020 need to utilize CSI to eliminate in advance CCI, utilizes the solution of precoding.And conventional precoding algorithm is as BD (Block Diagonalization, block diagonalization), BD+SVD (Block Diagonalization+Singular Value Decomposition algorithm, block diagonalization+singular value decomposition) etc., the CSI of all terminals 1010 need to be known in base station 1020, now terminal 1010 need to be fed back CSI to base station 1020, so that base station 1020 determines which terminal 1010 can form pairing terminal, and further carries out precoding algorithm.And adopt in Single User MIMO system through HS-DPCCH (Dedicated Physical Control Channel (uplink) for HS-DSCH, HS-DSCH special physical controlling channel of upward) PCI of channel (Pre-coding Control Indication, precoding control indication) field is fed back the mode of precoding codebook number, owing to can not carrying so many amount of information to base station 1020, thereby can not meet base station 1020 in multi-user MIMO system, carry out the requirement of precoding, so need to consider a kind of scheme of carrying more feedback informations.
Accordingly, the communication system for using MIMO technology, has proposed a kind of method of processing the feedback information of the channel status of down channel between base station 1020 and terminal 1010 in one embodiment of the invention.As shown in Figure 2, the method comprises:
2002, terminal 1010 sends Medium Access Control (MAC) Protocol Data Unit and flows to base station 1020 in ascending physical signal Traffic Channel, the feedback information of the channel status CSI that comprises down channel in one or more Medium Access Control (MAC) Protocol Data Unit in this Medium Access Control (MAC) Protocol Data Unit stream.
2004, terminal 1010 sends indication information to base station 1020, and this indication information is indicated the position of this one or more Medium Access Control (MAC) Protocol Data Unit in this Medium Access Control (MAC) Protocol Data Unit stream.
In this scheme, described ascending physical signal Traffic Channel can comprise DPDCH (Dedicated PhysicalData Channel, Dedicated Physical Data Channel) or E-DPDCH (E-DCH Dedicated PhysicalData Channel, the Dedicated Physical Data Channel strengthening), also can comprise other up physical channel that is used for transmitting data stream.Described indication information can send by ascending physical signal Traffic Channel, also can send by ascending physical signal control channel.
In the present embodiment, terminal sends the feedback information of the channel status CSI of down channel by ascending physical signal Traffic Channel, and by indication information, indicates the position of described feedback information, makes base station can know accurately described feedback information.Thereby be convenient to base station 1020, according to the feedback information of channel status, before transmission downlink data is to terminal 1010, carry out the object that precoding reduces interference, meet the requirement of MIMO technology.
Below in conjunction with described by way of example embodiment, the method for the feedback information of the CSI of processing down channel is described in detail.In the following embodiment of the present invention, adopting ascending physical signal Traffic Channel is that E-DPDCH is that example is described.
Fig. 3 has shown a kind of method of feedback information of processing channel state by way of example.The method comprises:
2010, terminal 1010 sends Medium Access Control (MAC) Protocol Data Unit and flows to base station 1020 on the Dedicated Physical Data Channel E-DPDCH strengthening, the feedback information of the CSI that comprises down channel in one or more Medium Access Control (MAC) Protocol Data Unit in this Medium Access Control (MAC) Protocol Data Unit stream.
This feedback information can be the CSI of current downlink channel, also can for the CSI of current downlink channel and the CSI of a front down channel subtract each other and compressed processing after the difference matrix compressed information that obtains.
Because the information content of CSI may be larger, but, not all content all can change fast, so, terminal 1010 sends feeding back to base station 1020 and can adopting of CSI: on long period, the CSI of feedback of down channel is to base station 1020, and on the short period, only feed back the information content that representative and the CSI of current channel and the CSI of last secondary channel exist difference, and be also difference matrix compressed information, give base station 1020.By a feedback differential matrix compression information within the short period, can reduce the content that terminal 1010 feeds back to the feedback information of base station 1020, reduce the consumption of feedback, can allow the more application message of uplink.In order to obtain difference matrix compressed information, terminal 1010 is preserved the CSI of a front down channel, after subtracting each other with the CSI of a front down channel, obtain difference matrix after obtaining the CSI of current downlink channel, then terminal 1010 can be compressed to process to this difference matrix and obtain difference matrix compressed information, then feeds back to base station 1020.
The mode that this compression is processed is described below by way of example:
If suppose that the front down channel CSI that terminal 1010 obtains is [D
1d
2d
3d
4... D
k-1d
k].The current downlink channel CSI that terminal 1010 obtains is [D
1d
2d
3d '
4... D
k-1d
k].So, front down channel CSI=[0 00 D ' of difference matrix=current downlink channel CSI-that obtain after two CSI are subtracted each other
4-D
4... 0 0].Then 1010 pairs of these difference matrixs of terminal obtain difference matrix compressed information after compressing, the rule of compression is: the matrix element that current downlink channel CSI is identical with a front down channel CSI represents with 0, follow subsequently the number of consecutive identical element, different elements represents by the difference of subtracting each other.So, if make NUM
1=D '
4-D
4, this difference matrix compressed information can be expressed as [0 3 NUM
10 k-4].
E-DPDCH comes from E-DCH (Enhanced Dedicated Channel strengthens dedicated transmission channel) mapping, and E-DPDCH has carried the user data on E-DCH.User data on E-DPDCH is processed by the MAC entity of MAC (Medium Access Control, media access control) protocol layer.MAC entity is packaged into one or more Medium Access Control (MAC) Protocol Data Unit (MAC PDU) by the user data on E-DPDCH, and these Medium Access Control (MAC) Protocol Data Units form a Medium Access Control (MAC) Protocol Data Unit stream 3000, as shown in Figure 4.When terminal 1010 needs this feedback information to report base station 1020, terminal 1010 is carried at this feedback information in one or more Medium Access Control (MAC) Protocol Data Unit 3010 of this Medium Access Control (MAC) Protocol Data Unit stream 3000.These Medium Access Control (MAC) Protocol Data Units 3010 that carry feedback information can be placed on the Medium Access Control (MAC) Protocol Data Unit of the certain position in MAC protocol data-flow 3000.
Through the PCI field feedback precoding codebook number of HS-DPCCH, compare to the mode of base station with existing terminal, terminal 1010 can be carried more information to base station 1020 by carry the mode of feedback information in MAC protocol data piece, so, in the scene of using Single User MIMO technology, use the scene of multiuser MIMO technology or in mixing the scene of using Single User MIMO technology and multiuser MIMO technology, terminal 1010 can report the information of complete CSI to base station 1020, or, at the CSI of current channel and the CSI of front primary information, compare and exist difference matrix informational needs to report base station 1020, and when the content of this difference matrix information is larger, terminal 1010 can realize and report this difference matrix information to base station 1020.
2020, this terminal 1010 sends indication information to this base station 1020, and this indication information is indicated the position of this one or more Medium Access Control (MAC) Protocol Data Unit in this Medium Access Control (MAC) Protocol Data Unit stream.
With reference to shown in Fig. 4 to Fig. 6, in order to indicate the position of Medium Access Control (MAC) Protocol Data Unit 3010 in MAC protocol data-flow 3000, on the one hand, this indication information can be carried in MAC protocol header unit.Also by comprise this indication information in MAC protocol header unit 3020, MAC protocol header unit 3020 is corresponding with one or more Medium Access Control (MAC) Protocol Data Unit 3010 that comprises feedback information.As shown in Figure 6, whether the length L 3024 and the indication that in MAC protocol header unit 3020, comprise logic channel indication LCH-ID 3022, feedback information also have data block F 3026 below, accordingly, this indication information is carried by logic channel indication LCH-ID 3022 and length L 3024.For example, the value of pre-defined LCH-ID 3022, the value setting in advance by this is indicated in the Medium Access Control (MAC) Protocol Data Unit 3010 corresponding with MAC protocol header unit 3020 and is comprised feedback information, the length that the Medium Access Control (MAC) Protocol Data Unit of this feedback information is carried in length L 3024 indications.
On the other hand, the control information that this indication information also can send by ascending physical signal control channel is carried, for example, can pass through the control information of E-DPCCH (E-DCH Dedicated Physical Control Channel, the special physical controlling channel of upward of enhancing) and carry described indication information.As shown in Figure 7, in Medium Access Control (MAC) Protocol Data Unit 3010 on E-DPDCH, comprise this feedback information, Medium Access Control (MAC) Protocol Data Unit 3010 can represent a Medium Access Control (MAC) Protocol Data Unit, also can represent a plurality of Medium Access Control (MAC) Protocol Data Units, but, the total bit length that forms this one or more Medium Access Control (MAC) Protocol Data Unit is a regular length setting in advance, and the control information 3030 on E-DPCCH is the control information corresponding with Medium Access Control (MAC) Protocol Data Unit 3000.As shown in Figure 8, control information 3030 comprises re-transmission sequence number RSN 3032, TFS Transport Format Set indicates E-TFCI 3034 and terminal whether to need the information Happy Bit 3036 of higher speed.In TFS Transport Format Set indication E-TFCI 3034, comprise this indication information.TFS Transport Format Set indication E-TFCI 3034 is the space of 7 bits.Can give the pre-defined value of value of E-TFCI 3034, after the original position of this one or more Medium Access Control (MAC) Protocol Data Unit that the value indication setting in advance by this comprises this feedback information is positioned at the indicated Medium Access Control (MAC) Protocol Data Unit in upper one or more MAC protocol header unit sending of E-DPDCH, also be after the original position of the value indication of the TFS Transport Format Set indication E-TFCI 3034 Medium Access Control (MAC) Protocol Data Unit N+13010 that comprises indication information is positioned at the indicated MAC data cell N 3008 of the upper MAC head unit N 3040 sending of E-DPDCH, also be that MAC data cell N+13010 can realize so by control information 3030 indicate whether to carry this feedback information in Medium Access Control (MAC) Protocol Data Unit 3000, simultaneously, if need to carry the bit length of feedback information, it is a regular length setting in advance, so, terminal 1010 by E-TFCI 3034 report indication information time, can be without the length of uploading feedback information, accordingly, although MAC data cell N+1 3010 can be one or more, but, total bit length of this one or more MAC data cell is a regular length setting in advance.
It should be noted that, above-mentioned 2010 and 2020 be only used to describe convenient, and order in no particular order.
Accordingly, the embodiment of the present invention also provides a kind of method of feedback information of processing channel state.As shown in Figure 9, the method comprises:
3500, base station 1020 receives Medium Access Control (MAC) Protocol Data Unit stream on the Dedicated Physical Data Channel E-DPDCH strengthening, the feedback information of the CSI that comprises down channel in one or more Medium Access Control (MAC) Protocol Data Unit in this Medium Access Control (MAC) Protocol Data Unit stream.
3600, base station 1020 receives this indication information, and this indication information is indicated the position of this one or more Medium Access Control (MAC) Protocol Data Unit in this Medium Access Control (MAC) Protocol Data Unit stream.
Understandable, above-mentioned 2030 and 2040 order also and in no particular order.
3700, base station 1020 obtains this feedback information according to this indication information from this one or more Medium Access Control (MAC) Protocol Data Unit.
Adopt said method, base station 1020 can obtain the feedback information of the down channel CSI of a plurality of terminal 1010 feedbacks, thereby base station 1020 can obtain the CSI of each terminal 1010, and judge each terminal 1010 current channel situation separately according to corresponding CSI, thereby the good two or more terminals of selective channel orthogonality are as pairing user from these terminals 1010.Base station 1020 is then according to pairing user's CSI, adopt different method for precoding generating pre-coding matrixes for reducing the interference of pairing between user, base station 1020 is created on the less data flow of interference between each terminal 1010 after descending initial data and pre-coding matrix are multiplied each other.Then, base station 1020 utilizes identical resource (in UMTS for identical channel code) to a plurality of terminals 1010, to send and disturb less data flow simultaneously, thus base station 1020 can be realized and a plurality of terminal 1010 between the optimization of communication performance.
In yet another embodiment of the present invention, can adopt the method in above-described embodiment, but, after base station 1020 obtains CSI that terminal 1010 reports on long period, owing to being not that all the elements of CSI all can change fast, so, terminal 1010 can be fed back the index information of precoding codebook to base station 1020 on the short period, the index information of short-period precoding codebook of usining feeds back supplementing of CSI completely as long period, the index information of the CSI that base station 1020 bases receive on long period and the precoding codebook receiving on the short period carries out corresponding precoding processing.Concrete, the CSI feeding back by E-DPDCH is received in base station 1020 at long period, utilize precoding algorithm as BD, BD+SVD etc. can obtain precoding vector, this precoding vector can so that the data flow of pairing between terminal disturb between the data flow of less and single terminal, disturb also less, single terminal 1010 sends the index information of precoding codebook of down channel on by the special physical controlling channel of upward HS-DPCCH at high speed descending sharing channel to base station 1020 in the short period, base station 1020 can be according to the index information adjustment of precoding codebook for reducing the precoding vector disturbing between these single terminal 1010 data flow, now do not change the precoding vector part of disturbing for reducing pairing terminal room, thereby terminal reports the index information of precoding codebook can realize base station 1020 to base station 1020 and in the short period, adjusts the precoding of the data flow of this single terminal in the short period, to adapt to current channel situation.
In the present embodiment, terminal 1010 reports the CSI of its down channel to base station 1020 in long period, reports the index information of precoding codebook of down channel to base station 1020 within the short period.Accordingly, base station 1020 is adjusted for reducing the precoding vector that between different terminals, data flow is disturbed on long period, adjusts for reducing the precoding vector disturbing between single terminal data stream on the short period.In order to realize precoding in base station 1020, terminal 1010 by the feedback information of channel status with two kinds multi-form in different cycles internal feedback to base station 1020, that not only can realize that terminal 1010 sends more channel status feeds back to base station 1020, and can within the short period, reduce the resource consumption of the feedback information of terminal 1010 transmitting channel states, thereby can allow more other information of uplink.
As shown in figure 10, shown by way of example a kind of terminal 4000 in an alternative embodiment of the invention, this terminal 4000 can complete the repertoire of terminal 1010 in said method embodiment.This terminal 4000 can adopt the mode of software and/or hardware to realize the repertoire of terminal in said method embodiment, and for example, terminal 4000 can comprise that one or more processor realizes the repertoire of terminal in said method embodiment.
Described feedback information is the CSI of down channel, or the CSI of this feedback information CSI that is down channel and a front down channel subtracts each other and compressed processing after the difference matrix compressed information that obtains.
Further, terminal 4000 can comprise MAC protocol header unit generation unit 4020.Described MAC protocol header unit generation unit 4020 is for one or more MAC protocol header unit of one or more Medium Access Control (MAC) Protocol Data Unit of generating correspondence and comprising this feedback information, and this one or more MAC protocol header unit comprises this indication information.
Optionally, terminal 4000 can comprise Logic Channel Identifier setting unit 4030.Described Logic Channel Identifier setting unit 4030 is set to a value setting in advance for the value of the Logic Channel Identifier LCH-ID of this one or more MAC protocol header unit, and this value setting in advance is used to indicate in this one or more Medium Access Control (MAC) Protocol Data Unit and comprises this feedback information.Logic Channel Identifier setting unit 4030 can be positioned at MAC protocol header unit generation unit 4020, also can be positioned at outside MAC protocol header unit generation unit 4020.
Further, terminal 4000 optionally comprises control information generation unit 4035.Described control information generation unit 4035 is for generating control information that should one or more Medium Access Control (MAC) Protocol Data Unit, and wherein, this control information sends by ascending physical signal control channel, and this control information comprises described indication information.This ascending physical signal control channel can, for the Dedicated Physical Control Channel E-DPCCH strengthening, can be also special used for physical control channel DPCCH, or be other control channels.
Optionally, terminal 4000 also comprises TFS Transport Format Set indication setting unit 4040.Described TFS Transport Format Set indication setting unit 4040 is set to a value setting in advance for the value of the TFS Transport Format Set indication E-TFCI of the Dedicated Physical Control Channel E-DPCCH of an enhancing of corresponding described one or more Medium Access Control (MAC) Protocol Data Unit, after the original position that this value setting in advance is used to indicate one or more Medium Access Control (MAC) Protocol Data Unit that comprises this feedback information is positioned at the indicated Medium Access Control (MAC) Protocol Data Unit in upper one or more MAC protocol header unit sending of this E-DPDCH.TFS Transport Format Set indication setting unit 4040 can be positioned at control information generation unit 4035, also can be positioned at outside control information generation unit 4035.
It should be noted that, terminal provided by the invention can be carried out with Wireless Telecom Equipment or network reception or the transmission of wireless signal.For example, this terminal can be wireless device (Radio device), cellular telephone apparatus (Cellular telephone device), computer equipment (Computing device), the equipment of personal communication devices (Personal communication system device) or other any equipment radio communications.Other specific implementation details of terminal provided by the invention can, with reference to the description of said method embodiment, no longer give too much to repeat here.
In the present embodiment, terminal by sending the feedback information of the CSI of down channel in an ascending physical signal Traffic Channel, and terminal sends indication information, this indication information is indicated the position in the data flow that the feedback information of this CSI sends in ascending physical signal Traffic Channel, thereby indication receiving terminal can obtain the feedback information of this CSI from the data flow that ascending physical signal Traffic Channel receives.Through the PCI field feedback precoding codebook number of HS-DPCCH, compare to the mode of base station with existing terminal, terminal can be carried more information by carry the mode of feedback information in MAC protocol block, accordingly, terminal can report the feedback information of the CSI of complete down channel.
As shown in figure 11, shown by way of example a kind of base station 5000 in another embodiment of the present invention, this base station 5000 can complete the repertoire of base station 1020 in said method embodiment.This base station 5000 can adopt the mode of software and/or hardware to realize the repertoire of base station in said method embodiment, and for example, base station 5000 can comprise that one or more processor realizes the repertoire of base station in said method embodiment.Base station 5000 can be used for a kind of communication system of using multiple-input, multiple-output MIMO technology, and base station 5000 comprises: receiving element 5010 and feedback information acquiring unit 5020.
Described receiving element 5010 for receiving a Medium Access Control (MAC) Protocol Data Unit stream, the feedback information of the CSI that comprises down channel in one or more Medium Access Control (MAC) Protocol Data Unit in this Medium Access Control (MAC) Protocol Data Unit stream in an ascending physical signal Traffic Channel; Receiving element 5010 is also for receiving indication information, and this indication information is indicated the position of this one or more Medium Access Control (MAC) Protocol Data Unit that comprises this feedback information in described Medium Access Control (MAC) Protocol Data Unit stream.
Described feedback information acquiring unit 5020 is for obtaining this feedback information according to this indication information from this one or more Medium Access Control (MAC) Protocol Data Unit.
Further, the CSI that this feedback information is down channel, or the CSI of the CSI that this feedback information is down channel and a front down channel subtracts each other the difference matrix compressed information obtaining after also compressed processing.
Further, receiving element 5010 comprises for receiving indication information: receiving element 5010 for receiving MAC protocol header unit stream that should Medium Access Control (MAC) Protocol Data Unit stream in this ascending physical signal Traffic Channel, this MAC protocol header unit stream comprises one or more MAC protocol header unit that should one or more Medium Access Control (MAC) Protocol Data Unit, and this one or more MAC protocol header unit comprises this indication information.
MAC protocol header unit resolves unit 5040 is for resolving one or more MAC protocol header unit that should one or more Medium Access Control (MAC) Protocol Data Unit, and this one or more MAC protocol header unit comprises indication information.
Further, base station 5000 further comprises: feedback information position determining unit 5030.Feedback information position determining unit 5030 equals one or more MAC protocol header unit of a value setting in advance for the value of obtaining Logic Channel Identifier LCH-ID from this MAC protocol header unit stream; Feedback information position determining unit 5030 also, for according to this one or more MAC protocol header unit, is determined the starting position of this one or more Medium Access Control (MAC) Protocol Data Unit in this MAC protocol data-flow.Feedback information position determining unit 5030 is also for determining the length of this one or more Medium Access Control (MAC) Protocol Data Unit according to this one or more MAC protocol header unit.
MAC protocol header unit resolves unit 5040 can be positioned at feedback information position determining unit 5030, also can be positioned at outside feedback information position determining unit 5030.
Further, receiving element 5010 comprises for receiving indication information: receiving element 5010 is at ascending physical signal control channel receiving control information, and described control information comprises described indication information.Further, this ascending physical signal control channel can, for the Dedicated Physical Control Channel E-DPCCH strengthening, can be also special used for physical control channel DPCCH.
Further, receiving element 5010 comprises for receiving indication information: receiving element 5010 is for receiving on the Dedicated Physical Control Channel E-DPCCH an enhancing TFS Transport Format Set indication E-TFCI that should one or more Medium Access Control (MAC) Protocol Data Unit, the value of this E-TFCI is used to indicate the original position of one or more Medium Access Control (MAC) Protocol Data Unit that comprises this feedback information, for example,, after can being positioned at the indicated Medium Access Control (MAC) Protocol Data Unit in upper one or more MAC protocol header unit sending of this E-DPDCH.
Further, feedback information position determining unit 5030 is also obtained the value to the TFS Transport Format Set indication E-TFCI should the Dedicated Physical Control Channel E-DPCCH of one or more Medium Access Control (MAC) Protocol Data Unit for the control information obtaining from control information resolution unit 5050.Feedback information position determining unit 5030 is a value setting in advance according to the value of E-TFCI, determines the starting position of this one or more Medium Access Control (MAC) Protocol Data Unit in this MAC protocol data-flow.
Control information resolution unit 5050 can be positioned at feedback information position determining unit 5030, also can be positioned at outside feedback information position determining unit 5030.
In the present embodiment, base station receives the feedback information of the CSI of current downlink channel in ascending physical signal Traffic Channel, and base station receives indication information, this indication information is indicated the position in the data flow that the feedback information of this CSI receives in this ascending physical signal Traffic Channel, thereby base station can obtain the feedback information of this CSI from the data flow that ascending physical signal Traffic Channel receives.Compare to the mode of base station with the existing feedback of the PCI field through HS-DPCCH precoding codebook number, by carry the mode of feedback information in MAC protocol block, can carry more information, thereby base station can receive the feedback information of the CSI of complete current downlink information.
In another embodiment of the present invention, provide a kind of communication system, this communication system is used multiple-input, multiple-output MIMO technology, and this communication system comprises at least one terminal, and at least one base station corresponding and that this one or more terminal is carried out data communication.Wherein, the specific implementation details of terminal and base station, the description referring to above-described embodiment, does not repeat them here.
One of ordinary skill in the art will appreciate that, the method in the embodiment of the present invention can be implemented in different ways.For example, these methods can adopt the mode of hardware, software or hardware and software combination to implement by program command.This program command, when carrying out, is carried out and is comprised the method in the embodiment of the present invention.For the mode that adopts hardware implementation, one or more processing module in the embodiment of the present invention can be implemented in one or more circuit module, this circuit module can be application-specific integrated circuit (ASIC) (ApplicationSpecific Integrated Circuits, ASICs), digital signal processor (Digital Signal Processors, DSPs), digital signal processing appts (Digital Signal Processing Devices, DSPDs), programmable logic device (Programmable Logic Devices, PLDs), field programmable gate array (FieldProgrammable Gate Arrays, FPGAs), processor, controller, microprocessor, microcontroller, or other design and can be used for carrying out the electronic equipment of the method in the embodiment of the present invention.
The mode that adopts implement software, the method in the embodiment of the present invention can adopt by the mode of one or more module and implement, and for example, can adopt the modular mode based on process or function to realize.These program command can be embodied in any computer or machine readable media.For example, this computer-readable recording medium can be the various media that can be program code stored such as internal memory, ROM, RAM, magnetic disc or CD.Internal memory can be positioned at processor, also can be positioned at outside processor.Herein, internal memory refers to the internal memory of long-term internal memory, short term memory, erasable internal memory, not erasable internal memory or the other types of any type.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (12)
1. a method for the feedback information of processing channel state, described method is for a kind of communication system of using multiple-input, multiple-output MIMO technology, and described method comprises:
In ascending physical signal Traffic Channel, send Medium Access Control (MAC) Protocol Data Unit stream, the feedback information of the channel status CSI that comprises down channel in one or more Medium Access Control (MAC) Protocol Data Unit in described Medium Access Control (MAC) Protocol Data Unit stream;
One or more MAC protocol header unit that generates corresponding described one or more Medium Access Control (MAC) Protocol Data Unit, described one or more MAC protocol header unit comprises indication information; Or, generate the control information of corresponding described one or more Medium Access Control (MAC) Protocol Data Unit, wherein, described control information sends by ascending physical signal control channel, and described control information comprises indication information;
Send indication information, the position of described one or more Medium Access Control (MAC) Protocol Data Unit of described indication information indication in described Medium Access Control (MAC) Protocol Data Unit stream.
2. method according to claim 1, is characterized in that, described ascending physical signal Traffic Channel is the Dedicated Physical Data Channel E-DPDCH strengthening or is Dedicated Physical Data Channel DPDCH.
3. method according to claim 1, wherein, while generating one or more MAC protocol header unit of corresponding described one or more Medium Access Control (MAC) Protocol Data Unit, on E-DPDCH, send described one or more MAC protocol header unit, described indication information is by value and the Length Indication of the Logic Channel Identifier LCH-ID in MAC protocol header unit.
4. method according to claim 1, wherein, the Dedicated Physical Control Channel E-DPCCH of described ascending physical signal control channel for strengthening.
5. method according to claim 4, wherein, described indication information is the value of TFS Transport Format Set indication E-TFCI.
6. according to the method described in claim 1 to 5 any one, wherein, the CSI that described feedback information is described down channel.
7. method according to claim 6, further comprises:
On the special physical controlling channel of upward HS-DPCCH of high speed descending sharing channel, send the index information of the precoding codebook of down channel, wherein, described index information is for carrying out precoding with described CSI combination to down channel.
8. according to the method described in claim 1 to 5 any one, wherein, the CSI of the CSI that described feedback information is described down channel and a front down channel subtracts each other the difference matrix compressed information obtaining after also compressed processing.
9. a terminal, described terminal is for a kind of communication system of using multiple-input, multiple-output MIMO technology, and described terminal comprises: transmitting element, MAC protocol header unit generation unit, control information generation unit, described transmitting element is used for:
In ascending physical signal Traffic Channel, send Medium Access Control (MAC) Protocol Data Unit stream, the feedback information of the channel status CSI that comprises down channel in one or more Medium Access Control (MAC) Protocol Data Unit in described Medium Access Control (MAC) Protocol Data Unit stream;
Send indication information, the position of described one or more Medium Access Control (MAC) Protocol Data Unit of described indication information indication in described Medium Access Control (MAC) Protocol Data Unit stream;
Described MAC protocol header unit generation unit, for generating one or more MAC protocol header unit of corresponding described one or more Medium Access Control (MAC) Protocol Data Unit, described one or more MAC protocol header unit comprises indication information;
Described control information generation unit, for generating the control information of corresponding described one or more Medium Access Control (MAC) Protocol Data Unit, described control information comprises indication information.
10. terminal according to claim 9, wherein, the CSI that described feedback information is current downlink channel; Or
Described feedback information is that the CSI of current downlink channel and the CSI of a front down channel subtract each other the difference matrix compressed information obtaining after also compressed processing.
11. 1 kinds of base stations, described base station is for a kind of communication system of using multiple-input, multiple-output MIMO technology, and described base station comprises:
Receiving element, described receiving element is used for:
In ascending physical signal Traffic Channel, receive Medium Access Control (MAC) Protocol Data Unit stream, the feedback information of the channel status CSI that comprises down channel in one or more Medium Access Control (MAC) Protocol Data Unit in described Medium Access Control (MAC) Protocol Data Unit stream;
Receive indication information, the position of described one or more Medium Access Control (MAC) Protocol Data Unit of described indication information indication in described Medium Access Control (MAC) Protocol Data Unit stream;
Feedback information acquiring unit, for obtaining described feedback information according to described indication information from described one or more Medium Access Control (MAC) Protocol Data Unit;
Described receiving element is further used for:
The MAC protocol header unit that receives corresponding described one or more Medium Access Control (MAC) Protocol Data Unit, obtains described indication information from described MAC protocol header unit; Or,
On ascending physical signal control channel, receive the control information of corresponding described one or more Medium Access Control (MAC) Protocol Data Unit, from described control information, obtain described indication information.
12. 1 kinds of communication systems, described communication system is used multiple-input, multiple-output MIMO technology, and described communication system comprises:
Terminal as described in claim 9 or 10; With,
Base station as claimed in claim 11.
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| CN101136718A (en) * | 2006-11-07 | 2008-03-05 | 中兴通讯股份有限公司 | Multi-input multi-output space multiplexing precoding method of wireless communication system |
| US20080080449A1 (en) * | 2006-09-28 | 2008-04-03 | Kaibin Huang | Generalized codebook design method for limited feedback systems |
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| US20080080449A1 (en) * | 2006-09-28 | 2008-04-03 | Kaibin Huang | Generalized codebook design method for limited feedback systems |
| CN101136718A (en) * | 2006-11-07 | 2008-03-05 | 中兴通讯股份有限公司 | Multi-input multi-output space multiplexing precoding method of wireless communication system |
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