CN101873625B - Relay link channel estimation method, system and equipment - Google Patents
Relay link channel estimation method, system and equipment Download PDFInfo
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Abstract
The invention discloses a relay link channel estimation method, a relay link channel estimation system and relay link channel estimation equipment, which are used for solving the problem that RN cannot estimate the channel of the relay link and therefore cannot acquire the downlink signals sent by an eNB to the RN due to the fact that a public pilot frequency in a control area of an MBSFN subframe is unavailable for a relay node. The method comprises: the RN performs channel measurement by using measurement pilot frequency or a relay special public pilot frequency and reports a measurement result to the eNB; the RN demodulates a relay control channel by using the measurement pilot frequency or the relay special public pilot frequency and acquires a downlink control signaling fed back by the eNB according to the measurement result, wherein the downlink signaling at least comprises configuration instruction information and downlink data resource position information; and the RN detects the special pilot frequency according to the configuration instruction information and demodulates a relay data channel indicated by the resource position information by using the detected special pilot frequency so as to acquire the download data of a local node.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to the channel estimation technique in a kind of repeated link.
Background technology
3GPP (3rd Generation Partnership Project, 3G (Third Generation) Moblie standardization body) has started the standardization effort of Long Term Evolution (Long Term Evolution, LTE).The LTE system is based on OFDM (Orthogonal Frequency Division Multiplex, OFDM) technology, and its subcarrier spacing is set as 15kHz, and corresponding OFDM symbol lengths is 66.67us.The LTE system comprises TDD (Time Division Duplex, time division duplex) and two kinds of duplex modes of FDD (Frequency Division Duplex, Frequency Division Duplexing (FDD)).Based on the frame structure of TDD as shown in Figure 1; a 10ms radio frames (Frame) is comprised of two 5ms fields; each field is by business time-slot (the Time Slot of 8 0.5ms; TS) and three special areas form; three special areas are respectively: DwPTS (Downlink Pilot TimeSlot; descending pilot frequency time slot), GP (coming downwards to up protection interval) and UpPTS (Uplink Pilot TimeSlot, uplink pilot time slot).
LTE-A (Long Term Evolution-Advanced, long-term evolution upgrading) system is the upgrade-system of LTE system, and service quality and the Extended Cell that will adopt relaying (Relay) cooperation transmission scheme to improve Cell Edge User cover.
The relay cooperative transmission scheme of LTE-A system is in research and design phase, and from present progress, (In-band) relaying is main design goal in half-duplex, the band.So-called half-duplex refers to that RN (RelayNode, via node) can not carry out the sending and receiving operation simultaneously on same frequency resource; In the so-called band, refer between eNB (evolution base station) and the RN transfer of data, with eNB and Macro UE (Macro UserEquipment, grand subscriber equipment) between and the RN frequency resource identical with the transfer of data use between the Relay UE (trunk subscriber equipment).Among the present invention, will be called MacroUE by the UE that eNB directly serves, the UE that is directly served by Relay is called Relay UE.
In introducing the LTE-A system of relaying, can be divided into such as lower area based on the frame structure of TDD, comprising:
Descending access zone: eNB and RN send data to respectively Macro UE and Relay UE;
The down mixing zone: eNB sends data to RN and Macro UE;
Up access zone: Macro UE and Relay UE send data to respectively eNB and RN;
Up Mixed Zone: Macro UE and RN send data to eNB.
In order to make the UE that the LTE-A system that introduces relaying can compatible Release 8 versions, namely keep RelayUE to have identical frame structure with Macro UE, adopt MBSFN (multimedia broadcasting Single Frequency Network) mode of subframe to carry out the transfer of data of repeated link.Based on the relay cooperative transmission scheme of tdd frame structure as shown in Figure 2, wherein TX represents sending mode, and RX represents receiving mode:
In up Mixed Zone, when RN sent upward signal to eNB, Relay UE did not carry out the transmission of upward signal; In the down mixing zone, when eNB sends downstream signal to RN, the frame structure of RN is configured to the MBSFN subframe, in the MBSFN subframe, comprise control area and data area, wherein the control area generally takies 1 or 2 OFDM symbolic numbers, RN sends descending control signaling to the UE of its service in the control area, and this moment, RN can not receive the downstream signal that eNB sends; After the data area in, RN receives the downstream signal that eNB sends, this moment, RN did not send downstream signal to the UE of its service.In the down mixing zone, eNB sends to the downlink data of RN and descending control signaling is multiplexing transmits by the data area of MBSFN subframe together.
Because the control area of MBSFN subframe is sightless for RN, therefore the public guide frequency in this control area is unavailable to RN, cause RN to carry out channel estimating (comprising channel measurement and channel demodulation) to repeated link, thereby can't obtain eNB to the downstream signal of its transmission.
Summary of the invention
The invention provides channel estimation methods, system and relay node equipment in a kind of repeated link, unavailable to via node in order to the public guide frequency in the control area that solves the MBSFN subframe, cause the via node can't be to the channel estimating of carrying out of repeated link, thereby can't obtain evolution base station to the problem of the downstream signal of its transmission.
Accordingly, the invention provides a kind of relay node equipment.
Channel estimation methods in the repeated link provided by the invention comprises:
Via node adopts measurement pilot frequency or the exclusive public guide frequency of relaying to carry out channel measurement, to evolution base station eNB reporting measurement result;
Described via node adopts described measurement pilot frequency or the exclusive public guide frequency of relaying that the relaying control channel is carried out demodulation, obtain the descending control signaling that described eNB returns according to measurement result, described descending control signaling comprises the resource location information of configuration indication information and downlink data at least;
Described via node detects dedicated pilot according to described configuration indication information, and adopts the relay data channel of the described resource location information indication of detected dedicated pilot demodulation, obtains the downlink data of this node.
Relay node equipment provided by the invention comprises:
Measuring unit is used for adopting measurement pilot frequency or the exclusive public guide frequency of relaying to carry out channel measurement, to evolution base station eNB reporting measurement result;
The control signal acquiring unit, be used for adopting described measurement pilot frequency or the exclusive public guide frequency of relaying that the relaying control channel is carried out demodulation, obtain the descending control signaling that described eNB returns according to measurement result, described descending control signaling comprises the resource location information of configuration indication information and downlink data at least;
Data capture unit is used for detecting dedicated pilot according to described configuration indication information, and adopts the relay data channel of the described resource location information indication of detected dedicated pilot demodulation, obtains the downlink data of this node.
Channel estimation system in the repeated link provided by the invention comprises evolution base station eNB and via node, wherein:
Described evolution base station eNB, for the measurement result of carrying out according to via node reporting behind the channel measurement, on the relay and control channel, send descending control signaling to described via node, described descending control signaling comprises the resource location information of configuration indication information and downlink data at least, and sends downlink data to described via node on the relay data channel;
Described via node is used for adopting measurement pilot frequency or the exclusive public guide frequency of relaying to carry out channel measurement, to described eNB reporting measurement result; Adopt the exclusive public guide frequency of described measurement pilot frequency or relaying that the relaying control channel is carried out demodulation, obtain the descending control signaling that described eNB returns according to measurement result; Detect dedicated pilot according to described configuration indication information, and adopt the relay data channel of the described resource location information indication of detected dedicated pilot demodulation, obtain the downlink data of this node.
Channel estimation methods in the repeated link provided by the invention, solved public guide frequency in the control area of MBSFN subframe to the disabled problem of via node, via node adopts measurement pilot frequency or the exclusive public guide frequency of relaying to carry out channel measurement, adopt measurement pilot frequency or the exclusive public guide frequency of relaying that the relay and control channel in the repeated link is carried out demodulation, adopt dedicated pilot that the relay data channel in the repeated link is carried out demodulation, thereby can accurately obtain eNB to the downstream signal of its transmission, the present invention has realized the compatibility to R8 version UE.
Description of drawings
Fig. 1 is based on the frame structure schematic diagram of TDD in the prior art;
Fig. 2 is based on the relay cooperative transmission schematic diagram of tdd frame structure in the prior art;
Fig. 3 is data and the multiplexing schematic diagram of control signal in the repeated link;
Channel estimation methods flow chart in the repeated link that Fig. 4 provides for the embodiment of the invention;
Channel estimation methods flow chart in the repeated link that Fig. 5 provides for embodiment one;
Channel estimation methods flow chart in the repeated link that Fig. 6 provides for embodiment two;
Channel estimation system block diagram in the repeated link that Fig. 7 provides for the embodiment of the invention;
The structured flowchart of the via node that Fig. 8 provides for the embodiment of the invention;
The structured flowchart of data capture unit in the via node that Fig. 9 provides for the embodiment of the invention.
Embodiment
In the LTE-A system of existing introducing relaying, having proposed the downstream signal in the repeated link is the multiplexing transmission scheme of downlink data and descending control signaling, and how multiplexing transmission is not clear and definite in the data area of MBSFN subframe and eNB sends to the downlink data of RN and descending control signaling.In the embodiment of the invention, the data area of MBSFN subframe can be called Relay Backhaul (relay backhaul) subframe.
One of them better solution as shown in Figure 3, one section special area on the frequency domain is set in the data area of MBSFN subframe, this special area comprises control section and data division, control section and data division time division multiplexing, the control area of supposing the MBSFN subframe takies K OFDM symbolic number, the control section of special area takies N OFDM symbolic number, and then the data division of special area takies 14-K-N OFDM symbolic number (the MBSFN subframe of 1ms comprises 14 OFDM symbolic numbers).Wherein:
The control section of special area is visible for all RN, be used for eNB and send descending control signaling to the RN that administers, the control section configuration relay and control channel of special area, specifically comprise R-PCFICH (Relay Physical Control Format Indication Channel, the relaying Physical Control Format Indicator Channel), R-PDCCH (Physical Downlink Control Channel, the relaying Physical Downlink Control Channel) and R-PHICH (Physical HARQ Indication Channel, relaying physical mixed automatic repeat request indicating channel).
The data division of special area is used for eNB to the Macro UE transmission downlink data of RN or R10 version, the data division configuration S-PDSCH (Special Physical Downlink SharedChannel PDSCH, special-purpose Physical Downlink Shared Channel) of special area.
In the data area of MBSFN subframe, the part outside the special area is the conventional data zone, is used for eNB to the Macro UE transmission downlink data of RN or R8/R10 version.Conventional data area configurations N-PDSCH (Normal Physical Downlink Shared Channel, general Physical Downlink Shared Channel).
Because S-PDSCH and N-PDSCH all can send downlink data to RN, be referred to as the relay data channel with sending among the channel of downlink data and the N-PDSCH channel that sends downlink data to RN to RN among the S-PDSCH in the embodiment of the invention.
Above-mentioned solution is to propose for the multiplexing transmission of downlink data and descending control signaling, but the pilot design scheme is not clear and definite.Propose in the embodiment of the invention: repeated link adopts the measurement pilot frequency in the exclusive public guide frequency of relaying or the LTE-A system to carry out channel measurement; Relay and control channel in the repeated link (control section of special area) adopts the measurement pilot frequency in the exclusive public guide frequency of relaying or the LTE-A system to carry out channel demodulation; Relay data channel in the repeated link (data division in the special area or conventional data zone) adopts dedicated pilot to carry out channel demodulation.
As shown in Figure 4, the channel estimation methods in the repeated link that the embodiment of the invention provides comprises:
S401, RN adopt measurement pilot frequency or the exclusive public guide frequency of relaying to carry out channel measurement, to eNB reporting measurement result;
S402, RN adopt measurement pilot frequency or the exclusive public guide frequency of relaying that the relaying control channel is carried out demodulation, obtain the descending control signaling that eNB returns according to measurement result, wherein, descending control signaling comprises the resource location information of configuration indication information and downlink data at least;
S403, RN detect dedicated pilot according to the configuration indication information, and adopt the relay data channel of detected dedicated pilot demodulation resource positional information indication, obtain the downlink data of this node.
The below will introduce execution mode in detail with specific embodiment.
Embodiment one
In the present embodiment, the measurement pilot frequency of the attributive eNB of RN is configured on the OFDM symbol in the Relay Backhaul subframe.Repeated link adopts measurement pilot frequency to carry out channel measurement; Relay and control channel in the repeated link adopts measurement pilot frequency to carry out demodulation; Relay data channel in the repeated link adopts dedicated pilot to carry out demodulation.As shown in Figure 5, comprise step:
S501, eNB notify RN and the Macro UE that administers by broadcast or high-level signaling, comprise the configuration information of measurement pilot frequency;
Better, measurement pilot frequency is configured in the control section in the Relay Backhaul subframe;
S502, RN detect measurement pilot frequency according to the configuration information of measurement pilot frequency;
S503, RN adopt detected measurement pilot frequency to carry out channel measurement, obtain measurement result, measurement result comprises one of following or combination in any, CQI (Channel Quality Indicator is specifically arranged, the channel quality indication), PMI (Precode Matrix Indicator, pre-coding matrix indication), RI (Rank Indicator, order indication), channel quality characteristics value, quantized channel value, etc.;
S504, RN are to eNB reporting measurement result;
S505, eNB carry out scheduling of resource according to the measurement result that RN reports, i.e. scheduling is used for the relay data channel of bearing downlink data, dispose simultaneously figuration mode and dedicated pilot, wherein the figuration mode can comprise wave beam forming, spatial reuse, transmission diversity etc., and dedicated pilot and downlink data figuration in the lump;
S506, eNB send descending control signaling to RN on the relay and control channel, comprise at least the resource location information of configuration indication information and downlink data in the descending control signaling;
In the implementation, the resource location information of downlink data can be carried on and send to RN among the R-PDCCH, and the indication of resource location information is used for the relay data channel of bearing downlink data; The configuration indication information can send to RN by high-level signaling or R-PDCCH;
The configuration indication information can comprise the configuration information of dedicated pilot, and for example pilot tone pattern and pilot frequency sequence dispose indication information and can also comprise simultaneously figuration mode information, are used to indicate the figuration mode of configuration;
The configuration indication information also can include only figuration mode information, and the configuration information by preseting dedicated pilot and the incidence relation of figuration mode are notified to RN the configuration information of dedicated pilot is recessive;
S507, RN adopt measurement pilot frequency that the relaying control channel is carried out demodulation, obtain the descending control signaling of this node;
The relay and control channel comprises R-PCFICH, R-PDCCH and R-PHICH, and the resource location information of the downlink data of this node that can obtain by demodulation R-PDCCH may also comprise the configuration indication information;
S508, RN detect dedicated pilot according to the configuration indication information;
In the implementation, if the configuration indication information includes only figuration mode information, then RN is according to the incidence relation of the configuration information of figuration mode information and predefined figuration mode and dedicated pilot, determine the configuration information of dedicated pilot, and detect dedicated pilot according to the configuration information of the dedicated pilot of determining; When detecting dedicated pilot according to the configuration information of dedicated pilot, can also be simultaneously with reference to other factors, for example cell ID, timeslot number, OFDM symbol sebolic addressing, etc.;
If the configuration indication information comprises the configuration information of dedicated pilot, then direct configuration information according to dedicated pilot detects dedicated pilot.
S509, eNB send downlink data to RN on the relay data channel, RN adopts the relay data channel of detected dedicated pilot demodulation resource positional information indication, obtain the downlink data of this node;
The relay data channel comprises among the S-PDSCH to RN and sends the channel that sends downlink data among the channel of downlink data or the R-PDSCH to RN.
Embodiment 2
In the present embodiment, the exclusive public guide frequency of control section in special area configuration relaying, the exclusive public guide frequency of relaying only are distributed in the special area of repeated link and do not make figuration.Repeated link adopts the exclusive public guide frequency of relaying to carry out channel measurement; Relay and control channel in the repeated link adopts the exclusive public guide frequency of relaying to carry out demodulation; Relay data channel in the repeated link adopts dedicated pilot to carry out demodulation.As shown in Figure 6, comprise step:
S601, eNB notify the RN that administers by broadcast or the high-level signaling of part, comprise the configuration information of the exclusive public guide frequency of relaying;
Better, the exclusive public guide frequency of relaying is configured in the control section in the Relay Backhaul subframe;
S602, RN detect the exclusive public guide frequency of relaying according to the configuration information of the exclusive public guide frequency of relaying;
S603, RN adopt the exclusive public guide frequency of detected relaying to carry out channel measurement, obtain measurement result, and measurement result comprises one of following or combination in any, and CQI, PMI, RI, channel quality characteristics value, quantized channel value are specifically arranged, etc.;
S604, RN are to eNB reporting measurement result;
S605, eNB carry out scheduling of resource according to the measurement result that RN reports, i.e. scheduling is used for the relay data channel of bearing downlink data, dispose simultaneously figuration mode and dedicated pilot, wherein the figuration mode can comprise wave beam forming, spatial reuse, transmission diversity etc., and dedicated pilot and downlink data figuration in the lump;
S606, eNB send descending control signaling to RN on the relay and control channel, comprise at least the resource location information of configuration indication information and downlink data in the descending control signaling;
In the implementation, the resource location information of downlink data can be carried on and send to RN among the R-PDCCH, and the indication of resource location information is used for the relay data channel of bearing downlink data; The configuration indication information can send to RN by high-level signaling or R-PDCCH;
The configuration indication information can comprise the configuration information of dedicated pilot, and for example pilot tone pattern and pilot frequency sequence dispose indication information and can also comprise simultaneously figuration mode information, are used to indicate the figuration mode of configuration;
The configuration indication information also can include only figuration mode information, and the configuration information by preseting dedicated pilot and the incidence relation of figuration mode are notified to RN the configuration information of dedicated pilot is recessive;
S607, RN adopt the exclusive public guide frequency of relaying that the relaying control channel is carried out demodulation, obtain the descending control signaling of this node;
The relay and control channel comprises R-PCFICH, R-PDCCH and R-PHICH, and the resource location information of the downlink data of this node that can obtain by demodulation R-PDCCH may also comprise the configuration indication information;
S608, RN detect dedicated pilot according to the configuration indication information;
In the implementation, if the configuration indication information includes only figuration mode information, then RN is according to the incidence relation of the configuration information of figuration mode information and predefined figuration mode and dedicated pilot, determine the configuration information of dedicated pilot, and detect dedicated pilot according to the configuration information of the dedicated pilot of determining; When detecting dedicated pilot according to the configuration information of dedicated pilot, can also be simultaneously with reference to other factors, for example cell ID, timeslot number, OFDM symbol sebolic addressing, etc.;
If the configuration indication information comprises the configuration information of dedicated pilot, then direct configuration information according to dedicated pilot detects dedicated pilot.
S609, eNB send downlink data to RN on the relay data channel, RN adopts the relay data channel of detected dedicated pilot demodulation resource positional information indication, obtain the downlink data of this node;
The relay data channel comprises among the S-PDSCH to RN and sends the channel that sends downlink data among the channel of downlink data or the R-PDSCH to RN.
Based on same technical conceive, the embodiment of the invention provides the channel estimation system in a kind of repeated link, because the principle that this system deals with problems is consistent with the channel estimation methods in the repeated link, so the enforcement of this system can referring to the enforcement of method, repeat part and repeat no more.As shown in Figure 7, this channel estimation system comprises evolution base station eNB 701 and via node RN 702, wherein:
Evolution base station eNB 701, for the measurement result of carrying out according to RN 702 reporting behind the channel measurement, on the relay and control channel, send descending control signaling to RN 702, wherein descending control signaling comprises the resource location information of configuration indication information and downlink data at least, and sends downlink data to RN 702 on the relay data channel;
Via node RN 702 is used for adopting measurement pilot frequency or the exclusive public guide frequency of relaying to carry out channel measurement, to eNB 701 reporting measurement results; Adopt measurement pilot frequency or the exclusive public guide frequency of relaying that the relaying control channel is carried out demodulation, obtain the descending control signaling that eNB 701 returns according to measurement result; Detect dedicated pilot according to the configuration indication information, and adopt the relay data channel of detected dedicated pilot demodulation resource positional information indication, obtain the downlink data of this node.
In the implementation, eNB 701, also are used for by broadcast or high-level signaling the configuration information of measurement pilot frequency or the exclusive public guide frequency of relaying being sent to RN 702;
Wherein, the configuration indication information that returns of eNB 701 may comprise figuration mode information; And
Wherein, a kind of possibility structure of via node as shown in Figure 8, comprising:
Measuring unit 801 is used for adopting measurement pilot frequency or the exclusive public guide frequency of relaying to carry out channel measurement, to eNB reporting measurement result;
Control signal acquiring unit 802, be used for adopting measurement pilot frequency or the exclusive public guide frequency of relaying that the relaying control channel is carried out demodulation, obtain the descending control signaling that eNB returns according to measurement result, wherein, descending control signaling comprises the resource location information of configuration indication information and downlink data at least;
Data capture unit 803 is used for detecting dedicated pilot according to the configuration indication information, and adopts the relay data channel of detected dedicated pilot demodulation resource positional information indication, obtains the downlink data of this node.
In the implementation, this via node can also comprise:
Receiving element 804 is used for receiving eNB by broadcast or the measurement pilot frequency of high-level signaling transmission or the configuration information of the exclusive public guide frequency of relaying;
Detecting unit 805 is used for detecting measurement pilot frequency or the exclusive public guide frequency of relaying according to the configuration information of the measurement pilot frequency that receives or the exclusive public guide frequency of relaying.
Wherein, the configuration indication information may comprise figuration mode information; And a kind of possibility structure of data capture unit 803, as shown in Figure 9, comprising:
Storing sub-units 901 is for the incidence relation of the configuration information of storing predefined figuration mode and dedicated pilot;
Obtain subelement 903, be used for adopting the relay data channel of detected dedicated pilot demodulation resource positional information indication, obtain the downlink data of this node.
The scheme that the embodiment of the invention provides, solved public guide frequency in the control area of MBSFN subframe to the disabled problem of RN, RN adopts measurement pilot frequency or the exclusive public guide frequency of relaying to carry out channel measurement, adopt measurement pilot frequency or the exclusive public guide frequency of relaying that the relay and control channel in the repeated link is carried out demodulation, adopt dedicated pilot that the relay data channel in the repeated link is carried out demodulation, thereby can accurately obtain eNB to the downstream signal (being downlink data and descending control signaling) of its transmission; The embodiment of the invention can keep Relay UE to have identical frame structure with Macro UE, has realized the compatibility to R8 version UE.
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 estimation methods in the repeated link is characterized in that, comprising:
Via node adopts measurement pilot frequency or the exclusive public guide frequency of relaying to carry out channel measurement, to evolution base station eNB reporting measurement result, the exclusive public guide frequency of described measurement pilot frequency or relaying is configured in the relay backhaul Relay Backhaul subframe, and described Relay Backhaul subframe is configured in the data area of Multicast Broadcast Single Frequency Network MBSFN subframe by via node;
Described via node adopts described measurement pilot frequency or the exclusive public guide frequency of relaying that the relaying control channel is carried out demodulation, obtain the descending control signaling that described eNB returns according to measurement result, described descending control signaling comprises the resource location information of configuration indication information and downlink data at least;
Described via node detects dedicated pilot according to described configuration indication information, and adopts the relay data channel of the described resource location information indication of detected dedicated pilot demodulation, obtains the downlink data of this node.
2. the method for claim 1 is characterized in that, described via node adopts measurement pilot frequency or the exclusive public guide frequency of relaying to carry out also comprising before the channel measurement:
ENB sends to via node by broadcast or high-level signaling with the configuration information of measurement pilot frequency or the exclusive public guide frequency of relaying;
Described via node detects described measurement pilot frequency or the exclusive public guide frequency of relaying according to the measurement pilot frequency that receives or the configuration information of the exclusive public guide frequency of relaying.
3. the method for claim 1 is characterized in that, the exclusive public guide frequency of described measurement pilot frequency or relaying is configured in the control section in the Relay Backhaul subframe.
4. the method for claim 1 is characterized in that, described configuration indication information comprises figuration mode information; And
Described via node detects dedicated pilot according to the configuration indication information, specifically comprises:
Described via node is determined the configuration information of dedicated pilot according to the incidence relation of the configuration information of described figuration mode information and predefined figuration mode and dedicated pilot; And
Configuration information according to dedicated pilot detects dedicated pilot.
5. the method for claim 1 is characterized in that, described configuration indication information comprises the configuration information of dedicated pilot; And described via node is according to the configuration information detection dedicated pilot of dedicated pilot.
6. such as claim 4 or 5 described methods, it is characterized in that, when detecting dedicated pilot according to the configuration information of dedicated pilot, also simultaneously with reference to one of following or combination in any: cell ID, timeslot number, orthogonal frequency division multiplex OFDM symbol sebolic addressing.
7. method as claimed in claim 5 is characterized in that, the configuration information of described dedicated pilot sends to described via node by high-level signaling or relaying Physical Downlink Control Channel R-PDCCH.
8. such as claim 2 or 5 described methods, it is characterized in that described configuration information comprises pilot patterns sample and pilot frequency sequence.
9. the method for claim 1 is characterized in that, described measurement result comprises one of following or combination in any: channel quality indicator (CQI), pre-coding matrix indication PMI, order indication RI, channel quality characteristics value, quantized channel value.
10. the method for claim 1, it is characterized in that described relay and control channel comprises relaying Physical Control Format Indicator Channel R-PCFICH, relaying Physical Downlink Control Channel R-PDCCH and relaying physical mixed automatic repeat request indicating channel R-PHICH.
11. the method for claim 1, it is characterized in that, described relay data channel comprises the channel that sends downlink data among the special-purpose Physical Downlink Shared Channel S-PDSCH to via node, perhaps sends the channel of downlink data among the general Physical Downlink Shared Channel N-PDSCH to via node.
12. a relay node equipment is characterized in that, comprising:
Measuring unit, be used for adopting measurement pilot frequency or the exclusive public guide frequency of relaying to carry out channel measurement, to evolution base station eNB reporting measurement result, the exclusive public guide frequency of described measurement pilot frequency or relaying is configured in the relay backhaul Relay Backhaul subframe, and described Relay Backhaul subframe is configured in the data area of Multicast Broadcast Single Frequency Network MBSFN subframe by via node;
The control signal acquiring unit, be used for adopting described measurement pilot frequency or the exclusive public guide frequency of relaying that the relaying control channel is carried out demodulation, obtain the descending control signaling that described eNB returns according to measurement result, described descending control signaling comprises the resource location information of configuration indication information and downlink data at least;
Data capture unit is used for detecting dedicated pilot according to described configuration indication information, and adopts the relay data channel of the described resource location information indication of detected dedicated pilot demodulation, obtains the downlink data of this node.
13. relay node equipment as claimed in claim 12 is characterized in that, also comprises:
Receiving element is used for receiving eNB by broadcast or the measurement pilot frequency of high-level signaling transmission or the configuration information of the exclusive public guide frequency of relaying;
Detecting unit is used for detecting described measurement pilot frequency or the exclusive public guide frequency of relaying according to the measurement pilot frequency that receives or the configuration information of the exclusive public guide frequency of relaying.
14. relay node equipment as claimed in claim 12 is characterized in that, described configuration indication information comprises figuration mode information; And
Described data capture unit specifically comprises:
Storing sub-units is for the incidence relation of the configuration information of storing predefined figuration mode and dedicated pilot;
Detection sub-unit is used for the incidence relation stored according to described figuration mode information and described storing sub-units, determines the configuration information of dedicated pilot, and detects dedicated pilot according to the configuration information of the dedicated pilot of determining;
Obtain subelement, be used for adopting the relay data channel of the described resource location information indication of detected dedicated pilot demodulation, obtain the downlink data of this node.
15. the channel estimation system in the repeated link is characterized in that, comprises evolution base station eNB and via node, wherein:
Described evolution base station eNB, for the measurement result of carrying out according to via node reporting behind the channel measurement, on the relay and control channel, send descending control signaling to described via node, described descending control signaling comprises the resource location information of configuration indication information and downlink data at least, and sends downlink data to described via node on the relay data channel;
Described via node is used for adopting measurement pilot frequency or the exclusive public guide frequency of relaying to carry out channel measurement, to described eNB reporting measurement result; Adopt the exclusive public guide frequency of described measurement pilot frequency or relaying that the relaying control channel is carried out demodulation, obtain the descending control signaling that described eNB returns according to measurement result; Detect dedicated pilot according to described configuration indication information, and the relay data channel that adopts the described resource location information of detected dedicated pilot demodulation to indicate, obtain the downlink data of this node, the exclusive public guide frequency of described measurement pilot frequency or relaying is configured in the relay backhaul Relay Backhaul subframe, and described Relay Backhaul subframe is configured in the data area of Multicast Broadcast Single Frequency Network MBSFN subframe by via node.
16. system as claimed in claim 15 is characterized in that,
Described eNB also is used for by broadcast or high-level signaling the configuration information of measurement pilot frequency or the exclusive public guide frequency of relaying being sent to via node;
Described via node also is used for detecting described measurement pilot frequency or the exclusive public guide frequency of relaying according to the measurement pilot frequency that receives or the configuration information of the exclusive public guide frequency of relaying.
17. system as claimed in claim 15 is characterized in that,
The described configuration indication information that described eNB returns comprises figuration mode information; And
Described via node is further used for the incidence relation according to the configuration information of described figuration mode information and predefined figuration mode and dedicated pilot, determines the configuration information of dedicated pilot; And detect dedicated pilot according to the configuration information of the dedicated pilot of determining.
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| CN102148638B (en) * | 2010-02-10 | 2014-04-09 | 电信科学技术研究院 | Method, device and system for configuring multicast broadcast single frequency network (MBSFN) sub-frames |
| CN102468908A (en) * | 2010-11-05 | 2012-05-23 | 大唐移动通信设备有限公司 | Configuration method of demodulation reference signal of backhaul link control channel and equipment |
| CN102469473B (en) * | 2010-11-09 | 2015-08-12 | 中兴通讯股份有限公司 | A kind of channel measuring method based on Downlink Control Information and system |
| CN102891715B (en) * | 2011-07-22 | 2017-12-26 | 中兴通讯股份有限公司 | A kind of processing method and system of backhaul link subframe |
| JP5693744B2 (en) | 2011-08-05 | 2015-04-01 | エヌイーシー（チャイナ）カンパニー， リミテッドＮＥＣ（Ｃｈｉｎａ）Ｃｏ．，Ｌｔｄ． | Method and apparatus for instructing downlink channel measurement in relay system and method and apparatus for performing downlink channel measurement |
| CN112615706B (en) * | 2016-01-15 | 2022-08-19 | 中兴通讯股份有限公司 | Signal sending method, signal receiving method and device |
| CN108023667B (en) * | 2016-11-03 | 2020-06-02 | 华为技术有限公司 | Transmission control method and device |
| CN108282322A (en) | 2017-01-06 | 2018-07-13 | 华为技术有限公司 | A kind of method and apparatus of configuration reference signal |
| WO2018126979A1 (en) * | 2017-01-06 | 2018-07-12 | 华为技术有限公司 | Method and apparatus for configuring reference signal |
| US10250340B1 (en) | 2017-02-27 | 2019-04-02 | Sprint Communications Company L.P. | Wireless relay directional testing |
| CN110062406B (en) * | 2018-01-19 | 2022-07-12 | 成都华为技术有限公司 | Link measurement method and device |
| CN110505639B (en) * | 2018-05-16 | 2023-01-24 | 成都鼎桥通信技术有限公司 | Relay measurement configuration method and device |
| CN111200486B (en) * | 2018-11-19 | 2021-08-27 | 华为技术有限公司 | Method and apparatus for wireless communication |
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