CN101932077A - Channel processing method and equipment for backhaul control channel - Google Patents
Channel processing method and equipment for backhaul control channel Download PDFInfo
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- CN101932077A CN101932077A CN2009100874103A CN200910087410A CN101932077A CN 101932077 A CN101932077 A CN 101932077A CN 2009100874103 A CN2009100874103 A CN 2009100874103A CN 200910087410 A CN200910087410 A CN 200910087410A CN 101932077 A CN101932077 A CN 101932077A
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Abstract
The invention discloses a channel processing method and equipment on backhaul control channel, and the method comprises the following steps: determining the resource position of a relay physical control format indicator channel (PCFICH); carrying out channel estimation on the relay PCFICH by utilizing the common pilot frequency in a frequency band of the relay PCFICH based on the resource position of the relay PCFICH to obtain the first channel estimation information; detecting the relay PCFICH based on the first channel estimation information to obtain the resource position of a relay physical downlink control channel (PDCCH); carrying out channel estimation on the relay PDCCH by utilizing the common pilot frequency based on the resource position of the relay PDCCH to obtain the second channel estimation information; and detecting the relay PDCCH based on the second channel estimation information. The embodiment of the invention can perform accurate channel estimation and detection on the relay PCFICH and the relay PDCCH.
Description
Technical field
The present invention relates to mobile communication technology, particularly a kind of channel processing method of backhaul control channel and equipment.
Background technology
1, LTE-A (Long Term Evolution Advanced, long-term evolution upgrading) system configuration introduction.
Fig. 1 is the schematic network structure of LTE-A system, in the network configuration of LTE-A system:
ENB (evolution base station) links CN (Core Network, core net) by wireline interface;
RN (Relay Node, via node) links eNB by wave point;
UE (User Equipment, subscriber equipment) links RN or eNB by wave point.
2, the pilot tone related content is introduced.
There are public guide frequency and special pilot frequency for user two class pilot tones in the LTE system among the promptly usually said 3GPP R8 (3GPP version 8).
1), public guide frequency is that full bandwidth sends, the ID of concrete configuration and sub-district (Identifier identifies) is relevant, just in sub-district, the pattern of its public guide frequency is identical.Control channel PDCCH (physical downlink control channel, Physical Downlink Control Channel) only can come demodulation by enough public guide frequencies, detect simultaneously because PDCCH is a plurality of users, as seen its pilot tone must all be to all users, and is identical.
Fig. 2 is the public guide frequency configuration schematic diagram of port 0-3, and public guide frequency disposes as shown in the figure.
2), the configuration of special pilot frequency for user and each be subscriber-related, only in certain user's data zone, send.
In the LTE-A system, introduced CQI-RS (the Channel Quality Indicator-Reference Signal of special measure channel quality, channel quality indication-reference symbol), with the DM-RS that is used for the user data demodulation (Demodulation-Reference Signal, demodulation-reference symbol).Wherein, the frequency domain density of CQI-RS is identical with the public guide frequency density of LTE system, but the density on the time domain is very little, may be that only 10ms just sends above the symbol at certain OFDM of a subframe (Orthogonal Frequency Division Multiplex, OFDM).
DM-RS is in fact very similar with the special pilot frequency for user of LTE system, and difference mainly is the transmission that DM-RS supports a plurality of data flow of a plurality of ports, and the special pilot frequency for user of LTE system is only supported the transmission of single port single data stream.
In the LTE-A system, introduced RN in order to improve throughput of system and to increase network coverage.Link between relaying and the eNB is referred to as backhaul (backhaul) link.ENB uses special control channel R-PDCCH (Relay-PDCCH, relaying-PDCCH) to the relevant control signaling of relay transmission on the backhaul link.And R-PDCCH is positioned at PDSCH (Physical Downlink Shared Channel, Physical Downlink Shared Channel) regional extent inside.In the LTE-A system,, in the PDSCH scope, will not transmit public guide frequency in order to reduce the expense of public guide frequency under the multiport situation.
For purpose that reaches dynamic dispatching and the user who does not influence other 3GPP R8 and 3GPP R10, utilize R-PCFICH (Relay-Physical Control Format Indicator CHannel, relaying-Physical Control Format Indicator Channel) indicates the time-frequency size of R-PDCCH, it is the OFDM number of symbols that frequency band broadband and time domain take.
The deficiencies in the prior art are: in the LTE-A system, also do not have the channel estimation scheme of R-PCFICH and R-PDCCH.
Summary of the invention
The invention provides a kind of channel processing method and equipment of backhaul control channel, in order to the problem of the channel estimating that solves the processing R-PCFICH that on back haul link, exists in the prior art and R-PDCCH.
A kind of channel processing method of backhaul control channel is provided in the embodiment of the invention, has comprised the steps:
Determine the resource location of R-PCFICH;
According to the public guide frequency in the resource location use R-PCFICH frequency band of R-PCFICH R-PCFICH is carried out channel estimating and obtain the first channel estimating information;
According to the first channel estimating information R-PCFICH is detected the back and obtain the R-PDCCH resource location;
Resource location according to R-PDCCH uses public guide frequency that R-PDCCH is carried out channel estimating acquisition second channel estimated information;
According to the second channel estimated information R-PDCCH is detected.
Preferably, the public guide frequency in the R-PCFICH frequency band be with R-PCFICH with public guide frequency frequency band, nearest, in the relaying zone, describedly be meant that recently frequency domain is identical, or, the identical or adjacent symbol of time domain.
Preferably, the public guide frequency that R-PDCCH is carried out channel estimating is: the pilot tone in the R-PDCCH frequency band, or the pilot tone of full bandwidth.
Preferably, when determining the resource location information of R-PCFICH, determine according to the indication information of preset configuration and/or the eNB that receives.
Preferably, the pattern of public guide frequency is the public guide frequency pattern of LTE system.
A kind of channel processing method of backhaul control channel also is provided in the embodiment of the invention, has comprised the steps:
ENB determines the resource location information that R-PCFICH and R-PDCCH take;
ENB sends indication information at R-PCFICH to relaying, and corresponding pilot signal, the resource location that described indication information indication R-PDCCH takies.
Preferably, when R-PDCCH and R-PDSCH and PDSCH employing FDM, the resource location information that described indication information indication R-PDCCH takies comprises frequency domain position;
As R-PDCCH and R-PDSCH employing TDM, when R-PDCCH and R-PDSCH and PDSCH adopted FDM, the resource location information that described indication information indication R-PDCCH takies comprised the time-domain symbol number of R-PDCCH and the frequency bandwidth that R-PDCCH takies.
A kind of trunking is provided in the embodiment of the invention, has comprised:
The primary importance determination module is used for determining the resource location of R-PCFICH;
First estimation module is used for according to the public guide frequency in the resource location use R-PCFICH frequency band of R-PCFICH R-PCFICH being carried out channel estimating and obtains the first channel estimating information;
Second place determination module is used for according to the first channel estimating information R-PCFICH being detected the back and obtains the R-PDCCH resource location;
Second estimation module is used for using public guide frequency that R-PDCCH is carried out channel estimating acquisition second channel estimated information according to the resource location of R-PDCCH;
Detection module is used for according to the second channel estimated information R-PDCCH being detected.
Preferably, described first estimation module be further used for adopting with R-PCFICH be public guide frequency in the R-PCFICH frequency band with public guide frequency frequency band, nearest, in the relaying zone, describedly be meant that recently frequency domain is identical, or, the identical or adjacent symbol of time domain.
Preferably, described primary importance determination module is further used for determining according to the indication information of preset configuration and/or the eNB that receives the resource location information of R-PCFICH.
Preferably, described second estimation module is further used for adopting the pilot tone in the R-PDCCH frequency band, or the pilot tone of full bandwidth is carried out channel estimating to R-PDCCH.
A kind of base station is provided in the embodiment of the invention, has comprised:
Position determination module is used for the resource location information of determining that R-PCFICH and R-PDCCH take;
Sending module is used for sending indication information at R-PCFICH to relaying, and corresponding pilot signal, the resource location that described indication information indication R-PDCCH takies.
Preferably, sending module comprises first transmitting element and/or second transmitting element, wherein:
First transmitting element is used for sending indication information at R-PCFICH to relaying as R-PDCCH and R-PDSCH and PDSCH employing FDM the time, and the resource location information that indication information indication R-PDCCH takies comprises frequency domain position;
Second transmitting element, be used for working as R-PDCCH and R-PDSCH employing TDM, when R-PDCCH and R-PDSCH and PDSCH adopt FDM, send indication information at R-PCFICH to relaying, the resource location information that indication information indication R-PDCCH takies comprises the time-domain symbol number of R-PDCCH and the frequency bandwidth that R-PDCCH takies.
A kind of channel processing system of backhaul control channel is provided in the embodiment of the invention, has comprised:
ENB is used for after determining the resource location information that R-PCFICH and R-PDCCH take, and sends indication information and corresponding pilot signal at R-PCFICH to trunking, the resource location that described indication information indication R-PDCCH takies;
Trunking is used for behind the resource location of determining R-PCFICH, according to the public guide frequency in the resource location use R-PCFICH frequency band of R-PCFICH R-PCFICH is carried out channel estimating and obtains the first channel estimating information; According to the first channel estimating information R-PCFICH is detected the back and obtain the R-PDCCH resource location; Resource location according to R-PDCCH uses public guide frequency that R-PDCCH is carried out channel estimating acquisition second channel estimated information; According to the second channel estimated information R-PDCCH is detected.
Preferably, described trunking be further used for adopting with R-PCFICH be public guide frequency in the R-PCFICH frequency band with public guide frequency frequency band, nearest, in the relaying zone, describedly be meant that recently frequency domain is identical, or, the identical or adjacent symbol of time domain.
Preferably, described base station is further used for sending indication information at R-PCFICH to relaying when R-PDCCH and R-PDSCH and PDSCH employing FDM, and the resource location information that indication information indication R-PDCCH takies comprises frequency domain position; As R-PDCCH and R-PDSCH employing TDM, when R-PDCCH and R-PDSCH and PDSCH adopt FDM, send indication information at R-PCFICH to relaying, the resource location information that indication information indication R-PDCCH takies comprises the time-domain symbol number of R-PDCCH and the frequency bandwidth that R-PDCCH takies.
Preferably, the public guide frequency that described trunking is further used for R-PDCCH is carried out channel estimating is: the pilot tone in the R-PDCCH frequency band, or the pilot tone of full bandwidth.
Beneficial effect of the present invention is as follows:
The technical scheme that provides in the embodiment of the invention has provided under the situation of using R-PCFICH indication R-PDCCH time-frequency position, R-PCFICH and R-PDCCH is carried out the technical scheme of channel estimating.
At first R-PCFICH is carried out channel estimating and obtain the first channel estimating information according to the public guide frequency in the resource location use R-PCFICH frequency band of R-PCFICH, because the resource location of in the information that R-PCFICH sends, having indicated R-PDCCH to take, therefore can detect the back to R-PCFICH according to the first channel estimating information and obtain the R-PDCCH resource location, make that also can use public guide frequency that R-PDCCH is carried out channel estimating according to the resource location of R-PDCCH obtains the second channel estimated information, thereby can detect R-PDCCH according to the second channel estimated information; The technical scheme that provides in the invention process can guarantee that R-PCFICH and R-PDCCH take under the situation of different running time-frequency resources, correct carries out channel estimating and detection.
Description of drawings
Fig. 1 is the schematic network structure of LTE-A system in the background technology;
Fig. 2 is the public guide frequency configuration schematic diagram of background technology middle port 0-3;
Fig. 3 is the R-PDCCH channel region schematic diagram under the FDM mode in the embodiment of the invention;
Fig. 4 is the R-PDCCH channel region schematic diagram under the TDM mode in the embodiment of the invention;
Fig. 5 is the channel processing method implementing procedure schematic diagram of eNB side backhaul control channel in the embodiment of the invention;
Fig. 6 is the channel processing method implementing procedure schematic diagram of trunk side backhaul control channel in the embodiment of the invention;
Fig. 7 is the backhaul link channel configuration schematic diagram under the TDM situation in the embodiment of the invention;
Fig. 8 is the backhaul link channel configuration schematic diagram under the FDM situation in the embodiment of the invention;
Fig. 9 is the channel processing system structural representation of backhaul control channel in the embodiment of the invention;
Figure 10 is a trunking structural representation in the embodiment of the invention;
Figure 11 is an architecture of base station schematic diagram in the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described.
The inventor notices in the invention process, at present, the R-PCFICH of backhaul link and R-PDCCH channel have two kinds of TDM (Time Division Multiplexing, time division multiplexing) mode and FDM (Frequency Division Multiplexing, frequency division multiplexing) modes.The particular location of R-PCFICH and resource size are that eNB prenotices to relaying, are relatively more static configurations.Fig. 3 is the R-PDCCH channel region schematic diagram under the FDM mode, Fig. 4 is the R-PDCCH channel region schematic diagram under the TDM mode, in Fig. 3 and Fig. 4, PDSCH is the Physical Downlink Shared Channel in the LTE-A system, R-PDSCH (Relay-Physical Downlink Shared Channel, relaying-Physical Downlink Shared Channel) is the Physical Downlink Shared Channel to the relaying transmission in the backhaul link.
As shown in Figure 3, the FDM mode is R-PDCCH and R-PDSCH in the backhaul link, and PDSCH is mutual FDM's.In Fig. 3, R-PDCCH takies the PRB (physical resource block, Physical Resource Block) of a plurality of system configuration, and its pilot tone can use the public guide frequency of LTE to get final product.When R-PDCCH and R-PDSCH and PDSCH are under the situation of FDM, this moment, R-PCFICH only needed to indicate the frequency domain position of R-PDCCH get final product, because the number of symbols that takies of R-PDCCH is fixed at this moment.
As shown in Figure 4, the TDM mode is that R-PDCCH and R-PDSCH are TDM in the backhaul link, and they and PDSCH are FDM.For the R-PDCCH demodulation, can be in order to guarantee it by a plurality of relayings whiles, correct detecting, its pilot tone must be a public guide frequency.And the time-domain symbol number that the R-PCFICH of this moment not only indicates R-PDCCH, the frequency bandwidth of also indicating R-PDCCH to take.
In real system, can fast detecting arrive R-PCFICH in order to guarantee relaying, R-PCFICH is generally semi-static or static configuration, and promptly its position and size all are relatively more fixing.In the case, the position of R-PCFICH probably with position and not of uniform size the causing of R-PDCCH.The consistent bandwidth that refers to the frequency domain that takies is identical, general R-PCFICH only takies several RE (Resource Element, Resource Unit), but R-PDCCH can take several PRB, if the RE that R-PCFICH takies just in time is evenly distributed in the zone of R-PDCCH, then think consistent in this application.But because the area size of R-PCFICH is smaller, and the R-PDCCH region occupied is bigger, and the on all four situation in position is more rare.
Based on this, under inconsistent situation, provide the Channel Processing scheme of backhaul control channel in the embodiment of the invention, concrete, be used to handle the problem of the channel estimating of R-PCFICH and R-PDCCH.
In order clearly to show embodiments of the present invention, with respectively from eNB, describe with the enforcement of trunk side.
Fig. 5 is the channel processing method implementing procedure schematic diagram of eNB side backhaul control channel, as shown in the figure, and the processing procedure that can comprise the steps in the eNB side:
In the enforcement,, eNB is separated in the step that each channel sends information in order to clearly illustrate that the relation between each feature more, but this does not represent it is that the sequential of representing set by step sends, in fact, when each channel sends information, be to send by the running time-frequency resource that disposes.
In the enforcement, when R-PDCCH and R-PDSCH and PDSCH employing FDM, the resource location information that described indication information indication R-PDCCH takies comprises frequency domain position;
As R-PDCCH and R-PDSCH employing TDM, when R-PDCCH and R-PDSCH and PDSCH adopted FDM, the resource location information that described indication information indication R-PDCCH takies comprised the time-domain symbol number of R-PDCCH and the frequency bandwidth that R-PDCCH takies.
Also can the enforcement of eNB side be described below.
Fig. 6 is the channel processing method implementing procedure schematic diagram of trunk side backhaul control channel, as shown in the figure, and the processing procedure that can comprise the steps at trunk side:
Step 602, use public guide frequency in the R-PCFICH frequency band that R-PCFICH is carried out channel estimating according to the resource location of R-PCFICH to obtain the first channel estimating information;
In the enforcement, the public guide frequency in the R-PCFICH frequency band be with R-PCFICH with public guide frequency frequency band, nearest, in the relaying zone, describedly be meant that recently frequency domain is identical, or, the identical or adjacent symbol of time domain.
When step 601 is determined the resource location information of R-PCFICH, can be to determine according to the indication information of preset configuration and/or the eNB that receives, be according to preset configuration or indication or the combination of the two, configuration that can viewing system and deciding is static or semi-static such as the system configuration of R-PCFICH.
In step 604, the public guide frequency that R-PDCCH is carried out channel estimating can be: the pilot tone in the R-PDCCH frequency band, or the pilot tone of full bandwidth, improve it with this and detect performance.
In step 602,604, the pattern of the public guide frequency that is adopted can be selected the public guide frequency pattern of LTE system in force for use.
Also can the enforcement of trunk side be described below.
Adopt the reason of such scheme to be, for R-PCFICH, because relaying can be known its particular location in advance, and the same frequency band of R-PCFICH is the resource of relaying substantially, or is R-PDSCH, or is R-PDCCH, therefore can dispose public guide frequency for R-PCFICH certainly, therefore, utilize with R-PCFICH and just can carry out the channel estimating of R-PCFICH, and detect R-PCFICH with public guide frequency frequency band, nearest, in the relaying zone.After detecting R-PCFICH, just can obtain the resource location information that concrete R-PDCCH comprises size and position, at this moment, just can carry out the channel estimating of the public guide frequency of R-PDCCH intra-zone, and then demodulate the control information on the R-PDCCH.
Concrete, system is that R-PCFICH has disposed public guide frequency, and this public guide frequency should be: with R-PCFICH with public guide frequency frequency band, nearest, in the relaying zone, it is identical to refer to frequency domain recently, the identical or adjacent symbol of time domain.And the relaying zone is meant R-PCFICH, R-PDCCH, these several zones of R-PDSCH.
Can draw by above-mentioned analysis that programme element is in the invention process: according to the different resource of R-PCFICH in the system and R-PDCCH channel occupancy, carry out channel estimating in two steps: the first step, only detect R-PCFICH, promptly the pilot tone in R-PCFICH zone is carried out channel estimating; In second step, R-PDCCH is carried out channel estimating, and then detect concrete R-PDCCH information.
Below eNB side and trunk side are combined embodiments of the present invention are described.
Fig. 7 is the backhaul link channel configuration schematic diagram under the TDM situation, as shown in the figure, scheme according to the embodiment of the invention, in the enforcement, to at first in PRB3, carry out channel estimating (because R-PCFICH is in PRB3 according to public guide frequency, this is that relaying is known in advance) because this moment, relaying was not known among PRB2 and the PRB4 situation except the extra-regional public guide frequency of PDCCH.After in PRB3, carrying out channel estimating, can detect R-PCFICH, just can obtain the relevant information of PDCCH then, concrete PRB number and the OFDM number of symbols that takies that mainly be meant.At this moment, relaying just can carry out channel estimating according to public guide frequency in PRB2, PRB3 and PRB4, and then carries out the detection of R-PDCCH.Wherein, the 2D in the 2D-R-PCFICH zone refers to the time-domain symbol number that this R-PCFICH not only indicates R-PDCCH, also indicates the position and the width of its frequency domain, also is like this among Fig. 8.
Fig. 8 is the backhaul link channel configuration schematic diagram under the FDM situation, and as shown in the figure, according to the scheme of the embodiment of the invention, in the enforcement, with the same under the TDM situation, relaying at first carries out channel estimating according to the public guide frequency in the PRB3.After having detected R-PCFICH, relaying has been known the PRB number that R-PDCCH takies, and then carries out the channel estimating of whole public guide frequencies in PRB2 and the PRB3, and then detects the R-PDCCH relevant information.
By as seen above-mentioned, send R-PCFICH and R-PDCCH at eNB side: eNB to relaying, wherein, and the running time-frequency resource size that R-PCFICH indication R-PDCCH takies, and the positional information of R-PCFICH is known to the relaying.
At trunk side: relaying carries out the channel estimating of public guide frequency in its frequency band according to the positional information of the R-PCFICH that knows; Carry out the detection of R-PCFICH according to first step channel estimating information then, obtain the R-PDCCH relevant location information; At last in the R-PDCCH zone, carry out the channel estimating of public guide frequency, and then detect R-PDCCH information.
Based on same inventive concept, a kind of base station, trunking, and the channel processing system of backhaul control channel also are provided in the embodiment of the invention, because the principle that these equipment are dealt with problems is similar to the channel processing method of backhaul control channel, therefore the enforcement of these equipment can repeat part and not give unnecessary details referring to the enforcement of method.
Fig. 9 is the channel processing system structural representation of backhaul control channel, as shown in the figure, can comprise in the system:
ENB901, be used for after determining the resource location information that R-PCFICH and R-PDCCH take, send indication information at R-PCFICH to trunking, and corresponding pilot signal, send Downlink Control Information at R-PDCCH to trunking, the resource location that described indication information indication R-PDCCH takies;
In the enforcement, trunking can be further used for adopting with R-PCFICH be public guide frequency in the R-PCFICH frequency band with public guide frequency frequency band, nearest, in the relaying zone, describedly be meant that recently frequency domain is identical, or, the identical or adjacent symbol of time domain.
The base station can be further used for sending indication information at R-PCFICH to relaying when R-PDCCH and R-PDSCH and PDSCH employing FDM, and the resource location information that indication information indication R-PDCCH takies comprises frequency domain position; As R-PDCCH and R-PDSCH employing TDM, when R-PDCCH and R-PDSCH and PDSCH adopt FDM, send indication information at R-PCFICH to relaying, the resource location information that indication information indication R-PDCCH takies comprises the time-domain symbol number of R-PDCCH and the frequency bandwidth that R-PDCCH takies.
Figure 10 is the trunking structural representation, as shown in the figure, can comprise in the trunking:
Primary importance determination module 1001 is used for determining the resource location of R-PCFICH;
Second place determination module 1003 is used for according to the first channel estimating information R-PCFICH being detected the back and obtains the R-PDCCH resource location;
In the enforcement, first estimation module can be further used for adopting with R-PCFICH be public guide frequency in the R-PCFICH frequency band with public guide frequency frequency band, nearest, in the relaying zone, describedly be meant that recently frequency domain is identical, or, the identical or adjacent symbol of time domain.
The primary importance determination module can be further used for determining according to the indication information of preset configuration and/or the eNB that receives the resource location information of R-PCFICH.
Figure 11 is the architecture of base station schematic diagram, as shown in the figure, can comprise in the base station:
Sending module 1102 is used for sending indication information at R-PCFICH to relaying, and corresponding pilot signal, the resource location that described indication information indication R-PDCCH takies; For better performance the present invention, can further include in concrete the enforcement:
Downlink Control Information sending module 1103 is used for sending Downlink Control Information at R-PDCCH to relaying.
In the enforcement, sending module can comprise first transmitting element and/or second transmitting element, wherein:
First transmitting element is used for sending indication information at R-PCFICH to relaying as R-PDCCH and R-PDSCH and PDSCH employing FDM the time, and the resource location information that indication information indication R-PDCCH takies comprises frequency domain position;
Second transmitting element, be used for working as R-PDCCH and R-PDSCH employing TDM, when R-PDCCH and R-PDSCH and PDSCH adopt FDM, send indication information at R-PCFICH to relaying, the resource location information that indication information indication R-PDCCH takies comprises the time-domain symbol number of R-PDCCH and the frequency bandwidth that R-PDCCH takies.
For the convenience of describing, the each several part of the above device is divided into various modules with function or the unit is described respectively.Certainly, when enforcement is of the present invention, can in same or a plurality of softwares or hardware, realize the function of each module or unit.
In the invention process, in the LTE-A system, eNB sends R-PCFICH and R-PDCCH to relaying, and the frequency domain resource position is perhaps indicated in the running time-frequency resource position that R-PCFICH indication R-PDCCH takies.And R-PCFICH can take different running time-frequency resources with R-PDCCH, and perhaps the running time-frequency resource that takies of R-PCFICH and R-PDCCH varies in size.
Wherein, the running time-frequency resource size that R-PCFICH can indicate R-PDCCH to take is perhaps indicated the frequency domain resource size, and the R-PDCCH particular location also can be indicated indirectly by R-PCFICH.
Concrete, can indicate R-PDCCH to take several symbols, or take several symbols and frequency domain position.
In the invention process, in the LTE-A system, relaying carries out channel estimating twice, and for the first time the result of channel estimating is used for detecting R-PCFICH, and the result of channel estimating then is used for detecting R-PDCCH for the second time.
In the enforcement, R-PCFICH detects the public guide frequency number that uses with R-PDCCH can be different.
Concrete, the running time-frequency resource that the R-PCFICH public guide frequency number that detection is used with R-PDCCH takies can be different.
The scheme that proposes in the embodiment of the invention has provided under the situation of using R-PCFICH indication R-PDCCH time-frequency position, the channel estimating flow process of concrete R-PCFICH and R-PDCCH.This scheme can guarantee that R-PCFICH and R-PDCCH take under the situation of different running time-frequency resources, correctly carry out channel estimating and detection.
Those skilled in the art should understand that embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware embodiment, complete software implementation example or in conjunction with the form of the embodiment of software and hardware aspect.And the present invention can adopt the form that goes up the computer program of implementing in one or more computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) that wherein include computer usable program code.
The present invention is that reference is described according to the flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out by the processor of computer or other programmable data processing device produce to be used for the device of the function that is implemented in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is implemented in the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device, make on computer or other programmable devices and to carry out the sequence of operations step producing computer implemented processing, thereby the instruction of carrying out on computer or other programmable devices is provided for being implemented in the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
Although described the preferred embodiments of the present invention, in a single day those skilled in the art get the basic creative notion of cicada, then can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (17)
1. the channel processing method of a backhaul control channel is characterized in that, comprises the steps:
Determine the resource location of relaying-Physical Control Format Indicator Channel R-PCFICH;
According to the public guide frequency in the resource location use R-PCFICH frequency band of R-PCFICH R-PCFICH is carried out channel estimating and obtain the first channel estimating information;
According to the first channel estimating information R-PCFICH is detected the back and obtain relaying-Physical Downlink Control Channel R-PDCCH resource location;
Resource location according to R-PDCCH uses public guide frequency that R-PDCCH is carried out channel estimating acquisition second channel estimated information;
According to the second channel estimated information R-PDCCH is detected.
2. the method for claim 1, it is characterized in that, the public guide frequency in the R-PCFICH frequency band be with R-PCFICH with public guide frequency frequency band, nearest, in the relaying zone, describedly be meant that recently frequency domain is identical, or, the identical or adjacent symbol of time domain.
3. the method for claim 1 is characterized in that, the public guide frequency that R-PDCCH is carried out channel estimating is: the pilot tone in the R-PDCCH frequency band, or the pilot tone of full bandwidth.
4. as claim 1 or 2 or 3 described methods, it is characterized in that, when determining the resource location information of R-PCFICH, determine according to the indication information of preset configuration and/or evolution base station eNB.
5. the method for claim 1 is characterized in that, the pattern of public guide frequency is the public guide frequency pattern of Long Term Evolution LTE system.
6. the channel processing method of a backhaul control channel is characterized in that, comprises the steps:
ENB determines the resource location information that R-PCFICH and R-PDCCH take;
ENB sends indication information at R-PCFICH to relaying, and corresponding pilot signal, the resource location that described indication information indication R-PDCCH takies.
7. method as claimed in claim 6 is characterized in that,
When R-PDCCH and relaying-Physical Downlink Shared Channel R-PDSCH and Physical Downlink Shared Channel PDSCH employing frequency division multiplexing FDM, the resource location information that described indication information indication R-PDCCH takies comprises frequency domain position;
When R-PDCCH and R-PDSCH employing time division multiplexing tdm, when R-PDCCH and R-PDSCH and PDSCH adopted FDM, the resource location information that described indication information indication R-PDCCH takies comprised the time-domain symbol number of R-PDCCH and the frequency bandwidth that R-PDCCH takies.
8. a trunking is characterized in that, comprising:
The primary importance determination module is used for determining the resource location of R-PCFICH;
First estimation module is used for according to the public guide frequency in the resource location use R-PCFICH frequency band of R-PCFICH R-PCFICH being carried out channel estimating and obtains the first channel estimating information;
Second place determination module is used for according to the first channel estimating information R-PCFICH being detected the back and obtains the R-PDCCH resource location;
Second estimation module is used for using public guide frequency that R-PDCCH is carried out channel estimating acquisition second channel estimated information according to the resource location of R-PDCCH;
Detection module is used for according to the second channel estimated information R-PDCCH being detected.
9. trunking as claimed in claim 8, it is characterized in that, described first estimation module be further used for adopting with R-PCFICH be public guide frequency in the R-PCFICH frequency band with public guide frequency frequency band, nearest, in the relaying zone, describedly be meant that recently frequency domain is identical, or, the identical or adjacent symbol of time domain.
10. trunking as claimed in claim 8 is characterized in that, described primary importance determination module is further used for determining according to the indication information of preset configuration and/or the eNB that receives the resource location information of R-PCFICH.
11., it is characterized in that described second estimation module is further used for adopting the pilot tone in the R-PDCCH frequency band, or the pilot tone of full bandwidth is carried out channel estimating to R-PDCCH as claim 8 or 9 or 10 described trunkings.
12. a base station is characterized in that, comprising:
Position determination module is used for determining that the resource that R-PCFICH and R-PDCCH take puts information;
Sending module is used for sending indication information at R-PCFICH to relaying, and corresponding pilot signal, the resource location that described indication information indication R-PDCCH takies.
13. base station as claimed in claim 12 is characterized in that, sending module comprises first transmitting element and/or second transmitting element, wherein:
First transmitting element is used for sending indication information at R-PCFICH to relaying as R-PDCCH and R-PDSCH and PDSCH employing FDM the time, and the resource location information that indication information indication R-PDCCH takies comprises frequency domain position;
Second transmitting element, be used for working as R-PDCCH and R-PDSCH employing TDM, when R-PDCCH and R-PDSCH and PDSCH adopt FDM, send indication information at R-PCFICH to relaying, the resource location information that indication information indication R-PDCCH takies comprises the time-domain symbol number of R-PDCCH and the frequency bandwidth that R-PDCCH takies.
14. the channel processing system of a backhaul control channel is characterized in that, comprising:
ENB is used for after determining the resource location information that R-PCFICH and R-PDCCH take, and sends indication information and corresponding pilot signal at R-PCFICH to trunking, the resource location that described indication information indication R-PDCCH takies;
Trunking is used for behind the resource location of determining R-PCFICH, according to the public guide frequency in the resource location use R-PCFICH frequency band of R-PCFICH R-PCFICH is carried out channel estimating and obtains the first channel estimating information; According to the first channel estimating information R-PCFICH is detected the back and obtain the R-PDCCH resource location; Resource location according to R-PDCCH uses public guide frequency that R-PDCCH is carried out channel estimating acquisition second channel estimated information; According to the second channel estimated information R-PDCCH is detected.
15. system as claimed in claim 14, it is characterized in that, described trunking be further used for adopting with R-PCFICH be public guide frequency in the R-PCFICH frequency band with public guide frequency frequency band, nearest, in the relaying zone, describedly be meant that recently frequency domain is identical, or, the identical or adjacent symbol of time domain.
16. system as claimed in claim 14, it is characterized in that, described base station is further used for sending indication information at R-PCFICH to relaying when R-PDCCH and R-PDSCH and PDSCH employing FDM, and the resource location information that indication information indication R-PDCCH takies comprises frequency domain position; As R-PDCCH and R-PDSCH employing TDM, when R-PDCCH and R-PDSCH and PDSCH adopt FDM, send indication information at R-PCFICH to relaying, the resource location information that indication information indication R-PDCCH takies comprises the time-domain symbol number of R-PDCCH and the frequency bandwidth that R-PDCCH takies.
17., it is characterized in that the public guide frequency that described trunking is further used for R-PDCCH is carried out channel estimating is as claim 14 or 15 or 16 described systems: the pilot tone in the R-PDCCH frequency band, or the pilot tone of full bandwidth.
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