CN101964676B - Method and base station for sending relay link downlink demodulation reference signal and relay station - Google Patents
Method and base station for sending relay link downlink demodulation reference signal and relay station Download PDFInfo
- Publication number
- CN101964676B CN101964676B CN200910160647.XA CN200910160647A CN101964676B CN 101964676 B CN101964676 B CN 101964676B CN 200910160647 A CN200910160647 A CN 200910160647A CN 101964676 B CN101964676 B CN 101964676B
- Authority
- CN
- China
- Prior art keywords
- reference signal
- demodulated reference
- pdsch
- relay
- pdcch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a method and a base station for sending a relay link downlink demodulation reference signal and a relay station. The method comprises the following steps that: when sending relay link downlink control data to the relay station, the base station sends a first demodulation signal to the relay station at the same time; and when sending the relay link downlink service data to the relay station, the base station sends a second demodulation reference signal to the relay station at the same time, wherein the first demodulation reference signal is not pre-coded and is used for coherent demodulation of a relay-physical downlink control channel (R-PDCCH) and the second demodulation reference signal is pre-coded together with the relay link downlink service data before being sent and is used for the coherent demodulation of a relay-physical downlink shared channel (R-PDSCH). The method solves the problem of sending a corresponding modulation reference signal when the R-PDCCH and the R-PDSCH are sent by different multiplexing methods and different data pretreatment methods, so that the reliability of data transmission of the R-PDCCH and the R-PDSCH is guaranteed.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to a kind of sending method, base station and relay station of downlink demodulation reference signals of relay link.
Background technology
At present, the demand for development of mobile communication is to support higher transmission rate, more perfect signal to cover and higher resource utilization.In order to reach high transfer rate, next generation mobile communication system will adopt higher frequency bandwidth for transmission signal, and higher frequency bandwidth will be brought larger path loss simultaneously, affects the network coverage.Relaying (Relay) technology can increase covering and balance and increase cell throughout, and, via node (Relay Node, be called for short RN) than base station, have relatively little deployment cost, therefore, relaying is regarded as Long Term Evolution (Long Term Evolution, abbreviation LTE) key technology in evolution system-senior Long Term Evolution (LTE-Advanced is called for short LTE-A) system.
LTE and LTE-A system are to be all basis with OFDM (Orthogonal Frequency Division Multiplexing is called for short OFDM) technology.In ofdm system, when the communication resource is-form of bidimensional frequently.For example, in LTE system, the communication resource of uplink and downlink link is all to take frame (frame) as unit division on time orientation, and each radio frames (radio frame) length is 10ms, comprise the subframe that 10 length are 1ms (sub-frame), as shown in Figure 1.Difference according to Cyclic Prefix (Cyclic Prefix is called for short CP) length, can comprise 12 or 14 OFDM symbols in each subframe.In frequency direction, resource be take subcarrier as unit division, and specifically, in communication, the least unit that resource is distributed is Resource Block (Resource Block is called for short RB), and corresponding physical resource is Physical Resource Block (Physical RB is called for short PRB).A PRB comprises 12 subcarriers at frequency domain.
After introducing relay station, be equivalent to the transmission of data many a jumping, take double bounce system as example, the communication pattern of base station-terminal has originally become the communication pattern of base station-relay station-terminal, wherein base station-relay station link is called as repeated link (backhaul link), and relay station-terminal links is called as access link (access link).In multihop system, a part of terminal is linked under relay station, by relay station, completes communication service.Introduce relay station in LTE-A system after; need to guarantee the backwards compatibility for terminal; before guaranteeing, the terminal of version is (such as LTE Release-8; be called for short Rel-8) also can be linked under relay station; at this time just need to, not affecting under the prerequisite of relay station subordinate terminal communication, mark off a part of resource to guarantee the communication between base station and relay station.
Take LTE-A system as example, and in LTE-A system, definite base station-relay station communication and relay station-terminal communication are carried out with time division way at present, concrete, mark off a part for base station-relay station communication in descending sub frame, and these subframes are called as Relay subframe.Rel-8 terminal for relay station subordinate, Relay subframe is indicated as MBSFN(Multicast Broadcast Single Frequency Network, Multicast Broadcast Single Frequency Network, be called for short MBSFN) subframe, thereby Rel-8 terminal can be skipped these subframes, when completing base station-relay station communication, guaranteed the backwards compatibility for Rel-8 terminal.In LTE-A system, the structure of Relay subframe as shown in Figure 2.
In Relay subframe, RN sends control information to subordinate terminal in front 1 or 2 OFDM symbol, then pass through interval change-over time of the switching from transmission state to accepting state, from base station, receive again downlink data of relay link information, the conversion interval of the switching of last process again from accepting state to the state of transmission.Will only be concerned about in the present invention in Relay subframe, base station is to the efficient resource of relay station transmission data, and the PRB describing in the present invention comprises in a subframe base station to the significant character number of relay station transmission data in time domain.In Relay subframe, by comprising base station, arrive the Traffic Channel of relay station (Relay-Physical Downlink Shared Channel, relaying Physical Downlink Shared Channel, be called for short R-PDSCH) and/or control channel (Relay-Physical Downlink Control Channel, relaying Physical Downlink Control Channel, is called for short R-PDCCH), wherein, R-PDCCH carrying relay link downlink is controlled data, R-PDSCH carrying relay link downlink business datum.In LTE-A system, before downlink service data transmission, will carry out precoding (Precoding).And consider the feature of control channel transfer of data, before descending control data transmission, do not carry out precoding.
In LTE-A system, likely Shi YiPRBWei unit's carrying of R-PDCCH, and R-PDSCH adopts the mode of frequency division multiplexing; Or with part OFDM symbols carry, and R-PDSCH adopts the mode of time-division multiplexing; Or with the component frequency resource bearing in part OFDM symbol in Relay subframe, i.e. so-called time-frequency division multiplexing.For these 3 kinds of different multiplex modes, by causing producing in 3 kinds of dissimilar PRB:PRB, only has R-PDCCH; In PRB, only has R-PDSCH; R-PDCCH and R-PDSCH are multiplexing in same PRB.
And the pretreatment mode of relay link downlink control data and business data transmission may be different, the data of R-PDCCH are not carried out precoding (still may adopt the data pretreatment mode of transmit diversity), and the data of R-PDSCH are carried out precoding.Therefore,, for the R-PDCCH multiplex mode different with R-PDSCH and data pretreatment mode, the reference signal of corresponding demodulation R-PDCCH and R-PDSCH also will have different processing modes.At present in LTE-A system, the discussion about the sending method of Relay downlink demodulation reference signals of relay link (Demodulation Reference Signal is called for short DMRS) remains a blank.
Summary of the invention
The technical problem to be solved in the present invention is exactly sending method, base station and the relay station that proposes a kind of downlink demodulation reference signals of relay link, the transmission problem of corresponding demodulated reference signal when solution R-PDCCH and R-PDSCH adopt different multiplex modes and different pieces of information pretreatment mode to send.
In order to solve the problems of the technologies described above, the invention provides a kind of sending method of downlink demodulation reference signals of relay link, comprising:
When base station sends relay link downlink control data to relay station, the first demodulated reference signal is sent to described relay station simultaneously; And, when base station sends relay link downlink business datum to relay station, the second demodulated reference signal is sent to described relay station simultaneously;
Wherein,
Described relay link downlink is controlled Deta bearer in relaying Physical Downlink Control Channel R-PDCCH,
Described relay link downlink business datum is carried in relaying Physical Downlink Shared Channel R-PDSCH,
Described the first demodulated reference signal does not carry out precoding, for the coherent demodulation of R-PDCCH;
Before sending, described the second demodulated reference signal carries out precoding together with relay link downlink business datum, for the coherent demodulation of R-PDSCH;
As described R-PDCCH with R-PDSCH is multiplexing while transmitting in a Physical Resource Block, described base station is mapped in described the first demodulated reference signal and the second demodulated reference signal respectively in described Physical Resource Block, wherein, described the second demodulated reference signal is only mapped in the physical resource that in described Physical Resource Block, R-PDSCH takies, or the mapping position of described the second demodulated reference signal is whole described Physical Resource Block.
Further, above-mentioned sending method also can have following characteristics:
Described base station is mapped in described the first demodulated reference signal in the physical resource that described R-PDCCH takies, more described the first demodulated reference signal is sent to relay station.
Further, above-mentioned sending method also can have following characteristics:
Described physical resource is Physical Resource Block, or
Described physical resource is whole frequency resources in orthogonal frequency division multiplex OFDM symbol, or
Described physical resource is component frequency resource in OFDM symbol.
Further, above-mentioned sending method also can have following characteristics:
As described R-PDCCH with R-PDSCH is multiplexing while transmitting in a Physical Resource Block, described the first demodulated reference signal and the second demodulated reference signal are mutually orthogonal, and the mode of quadrature is: time division multiplexing or frequency division multiplexing or both combinations.
Further, above-mentioned sending method also can have following characteristics:
When described base station sends the first demodulated reference signal, described the first demodulated reference signal is corresponding with the antenna port that described R-PDCCH sends, and the demodulated reference signal that each antenna port is corresponding is mutually orthogonal.
Further, above-mentioned sending method also can have following characteristics:
When described base station sends the second demodulated reference signal, described the second demodulated reference signal is corresponding with the number of layers that described R-PDSCH sends, and each layer of corresponding demodulated reference signal is mutually orthogonal.
Further, above-mentioned sending method also can have following characteristics:
While being mapped with public reference signal CRS in the physical resource of the described R-PDCCH of transmission, described the first demodulated reference signal and described public reference signal quadrature;
While being mapped with CRS in the physical resource of the described R-PDSCH of transmission, described the second demodulated reference signal and described public reference signal quadrature.
Further, above-mentioned sending method also can have following characteristics:
The mode of described quadrature is: described orthogonal manner is one or several the combination in time division multiplexing or frequency division multiplexing or code division multiplexing.
Further, above-mentioned sending method also can have following characteristics:
Described relay station is according to described the first demodulated reference signal receiving, and demodulation relay link downlink is controlled data, and, according to described the second demodulated reference signal receiving, demodulation relay link downlink business datum.
In order to solve the problems of the technologies described above, the invention provides a kind of base station that sends downlink demodulation reference signals of relay link, comprising:
Processing module, for generating the first demodulated reference signal and second demodulated reference signal of repeated link, described the first demodulated reference signal does not carry out precoding, coherent demodulation for R-PDCCH, before described the second demodulated reference signal transmission, carry out precoding together with relay link downlink business datum, for the coherent demodulation of R-PDSCH;
As described R-PDCCH with R-PDSCH is multiplexing while transmitting in a Physical Resource Block, described base station is mapped in described the first demodulated reference signal and the second demodulated reference signal respectively in described Physical Resource Block, wherein, described the second demodulated reference signal is only mapped in the physical resource that in described Physical Resource Block, R-PDSCH takies, or the mapping position of described the second demodulated reference signal is whole described Physical Resource Block;
Sending module, for sending described the first demodulated reference signal and the second demodulated reference signal.
In order to solve the problems of the technologies described above, the invention provides a kind of relay station that receives downlink demodulation reference signals of relay link, comprising:
Receiver module, for receiving the first demodulated reference signal and second demodulated reference signal of repeated link; As described R-PDCCH with R-PDSCH is multiplexing while transmitting in a Physical Resource Block, described base station is mapped in described the first demodulated reference signal and the second demodulated reference signal respectively in described Physical Resource Block, wherein, described the second demodulated reference signal is only mapped in the physical resource that in described Physical Resource Block, R-PDSCH takies, or the mapping position of described the second demodulated reference signal is whole described Physical Resource Block;
Processing module, for according to described the first demodulated reference signal, demodulation relay link downlink is controlled data; And, according to described the second demodulated reference signal, demodulation relay link downlink business datum.
Mapping method by repeated link demodulated reference signal of the present invention and base station, relay station, solved the transmission problem that R-PDCCH and R-PDSCH adopt different data pretreatment mode and the demodulated reference signal under different multiplex modes, relay station is used this demodulated reference signal to carry out respectively the coherent demodulation of R-PDCCH and R-PDSCH, has guaranteed the reliability of R-PDCCH and R-PDSCH transfer of data.And when repeated link exists public reference signal when (Cell-specific Reference Signal is called for short CRS), the demodulated reference signal that the present invention describes can not disturb with CRS, has avoided the impact on terminal.
Accompanying drawing explanation
Fig. 1 is the frame structure schematic diagram of LTE/LTE-A system;
Fig. 2 is Relay subframe structure schematic diagram;
Fig. 3 is the sending method schematic diagram according to the downlink demodulation reference signals of relay link of the embodiment of the present invention;
Fig. 4 is the downlink relay link physical resource structural representation according to the embodiment of the present invention;
Fig. 5 is the second demodulated reference signal mapping schematic diagram of application example 1 of the present invention;
Fig. 6 is the first and second demodulated reference signal mapping schematic diagrames of application example 2 of the present invention;
Fig. 7 is the first and second demodulated reference signal mapping schematic diagrames of application example 3 of the present invention;
Fig. 8 is the first and second demodulated reference signal mapping schematic diagrames of application example 4 of the present invention;
Fig. 9 is base station of the present invention embodiment schematic diagram;
Figure 10 is relay station embodiment schematic diagram of the present invention.
Embodiment
Below in conjunction with drawings and the specific embodiments, the present invention is described in detail.
The transmission problem of corresponding demodulated reference signal while not relating to relay link downlink control channel R-PDCCH and relay link downlink Traffic Channel R-PDSCH employing different pretreatments and different multiplex mode in LTE-A system Relay correlation technique discussion at present.Embodiments of the invention provide a kind of sending method of downlink demodulation reference signals of relay link.The treatment principle of the method is: downlink demodulation reference signals of relay link is divided into the first demodulated reference signal and the second demodulated reference signal, wherein the first demodulated reference signal does not carry out precoding, coherent demodulation for R-PDCCH, the second demodulated reference signal carries out precoding together with relay link downlink business datum, for the coherent demodulation of R-PDSCH.Concrete handling process as shown in Figure 3.
Wherein,
The first demodulated reference signal is relevant with the multiplex mode of R-PDCCH and R-PDSCH with the concrete mapping mode of the second demodulated reference signal.The multiplex mode of R-PDCCH and R-PDSCH has time division way, frequency division mode or time-frequency division mode.Concrete, time division way refers to that R-PDCCH and R-PDSCH take respectively different OFDM symbols, multiplexing in same PRB; Frequency division mode refers to that R-PDCCH and R-PDSCH take respectively different Physical Resource Block PRB; Time-frequency division multiplexing refers in relay link downlink physical resource, and R-PDCCH and R-PDSCH can be multiplexing in part PRB.
The first demodulated reference signal does not carry out precoding, and the antenna port sending with R-PDCCH is corresponding, and the demodulated reference signal of each port is mutually orthogonal; The second demodulated reference signal carries out precoding together with relay link downlink business datum, and corresponding with the number of layers that R-PDSCH sends, the demodulated reference signal of each layer is mutually orthogonal.And, while having CRS in the physical resource of transmission R-PDCCH and R-PDSCH, the first demodulated reference signal and the second demodulated reference signal all with CRS quadrature.Here said orthogonal manner can be time division multiplexing (Time Division Multiplexing, be called for short TDM) or frequency division multiplexing (Frequency Division Multiplexing, the combination of one or more abbreviation FDM) or in code division multiplexing (Code Division Multiplexing is called for short CDM).
When R-PDCCH and R-PDSCH multiplexing in same PRB time, the first demodulated reference signal and the second demodulated reference signal are mutually orthogonal, the mode of quadrature is TDM or FDM or both combinations.
Step 302 when base station sends relay link downlink control data to relay station, sends to described relay station by the first demodulated reference signal simultaneously; And, when base station sends relay link downlink business datum to relay station, the second demodulated reference signal is sent to described relay station simultaneously;
In a descending Relay subframe, can there is R-PDCCH and R-PDSCH simultaneously, or only have R-PDCCH, or only have R-PDSCH.When R-PDCCH and R-PDSCH exist simultaneously, in the signal that base station sends at repeated link, carry the first demodulated reference signal and the second demodulated reference signal simultaneously; When only having R-PDCCH, in the signal that base station sends at repeated link, carry the first demodulated reference signal, without carrying the second demodulated reference signal; When only having R-PDSCH, in the signal that base station sends in repeated link, carry the second demodulated reference signal, without carrying the first demodulated reference signal.
Receive after the first demodulated reference signal and the second demodulated reference signal, relay station carries out coherent demodulation according to the first demodulated reference signal receiving to R-PDCCH, according to the second demodulated reference signal receiving, R-PDSCH is carried out to coherent demodulation.
Below in conjunction with application example, the implementation procedure of invention is described in detail.
In following application example, suppose to comprise a base station and several relay stations in LTE-A system Zhong Yige community, relay station adopts the MBSFN subframe in via node community to receive the data that base station sends, for relay station, receive the subframe of downlink data of relay link, it is MBSFN subframe that relay station is indicated this subframe to the Rel-8 terminal in own community.Suppose that the subframe that base station sends data to relay station adopts general cyclic prefix length (Normal CP), altogether include 14 OFDM symbols, and the original position that suppose relay station receives downlink data of relay link is the 4th OFDM symbol, the end position of reception is the 13rd OFDM symbol.In the repeated link resource of the corresponding PRB size of frequency domain as shown in Figure 4, each lattice in figure represents a resource element (resource element, be called for short RE), grey fill area represents that relay station receives the physical resource of downlink data of relay link, and the position of the CRS of 4 ports as shown in the figure.If base station is used the MBSFN subframe of this community to transmit data to relay station, in the 4th to the 13rd OFDM symbol, will not there is not CRS.
Application example 1
In application example 1, R-PDCCH and R-PDSCH adopt the mode of frequency division multiplexing in relay link downlink physical resource, and R-PDCCH and R-PDSCH take respectively different PRB, when in same PRB, R-PDCCH is different with R-PDSCH, exist.At this time the first demodulated reference signal and the second demodulated reference signal are mapped in respectively in R-PDCCH and the shared PRB of R-PDSCH, and are only mapped in R-PDCCH and the shared PRB of R-PDSCH.The first demodulated reference signal is corresponding with the antenna port of R-PDCCH transmission, and the reference signal of each port is mutually orthogonal; The second demodulated reference signal is corresponding with the number of layers of R-PDSCH transmission, and the reference signal of each layer is mutually orthogonal.And when base station is when existing CRS in the resource of relay station transmission data, the pattern of the first demodulated reference signal and the second demodulated reference signal all with the pattern quadrature of CRS.The orthogonal manner here can be a kind of mode in TDM, FDM or CDM or the combination of several modes.
As shown in Figure 5, be the mapping pattern schematic diagram of the second demodulated reference signal.In Fig. 5, the second demodulated reference signal is the multiplex mode that TDM/FDM/CDM mixes.Two layers of the second demodulated reference signal TDM in conjunction with FDM transmission have been described in Fig. 5, in each layer, again can CDM different layers.Such as in each layer, use the Walsh code that length is 2 to carry out spread spectrum in two adjacent pilot tone RE of frequency domain, again can multiplexing 2 layers, so just can obtain 4 tunnel the second demodulated reference signals, 4 layers of transmission of corresponding R-PDSCH.If base station is used the MBSFN subframe of this community to transmit data to relay station, the CRS in R-PDSCH will not exist.
For the pattern of the first demodulated reference signal, also can similarly obtain.
Should be appreciated that the pattern example of the first demodulated reference signal as described herein and the second demodulated reference signal is only for explaining and explanation the present invention, and also improper restriction of the present invention not in pairs.
Application example 2
In application example 2, R-PDCCH and R-PDSCH can be multiplexing in same PRB, and R-PDCCH and R-PDSCH take respectively different OFDM symbols in same PRB.As shown in Figure 6, suppose in base station in the resource of relay station transmission data, R-PDCCH is minimum takies 3 OFDM symbols, takies at most 4 OFDM symbols, and R-PDSCH takies all the other OFDM symbols.
In this example, the first demodulated reference signal can only be mapped in the physical resource that R-PDCCH takies, and the second demodulated reference signal can only be mapped in the physical resource that R-PDSCH takies.Concrete, the situation of the OFDM symbolic number minimum that the first demodulated reference signal may take according to R-PDCCH is shone upon, and in this example, can only be mapped in base station and to relay station, transmit in front 3 the OFDM symbols in the resource of data.The situation of the OFDM symbolic number minimum that the second demodulated reference signal may take according to R-PDSCH is equally shone upon, and in this example, can only be mapped in base station and to relay station, transmit in rear 6 OFDM in the resource of data.Figure 6 shows that the first demodulated reference signal and the second demodulated reference signal mapping pattern schematic diagram.Wherein the first demodulated reference signal represents with different filling shapes respectively with the second demodulated reference signal, as shown in Figure 6.If base station is used the MBSFN subframe of this community to transmit data to relay station, the CRS in R-PDSCH will not exist.
Further, the first demodulated reference signal is corresponding with the antenna port of R-PDCCH transmission, and the reference signal of each port is mutually orthogonal; The second demodulated reference signal is corresponding with the number of layers of R-PDSCH transmission, and the reference signal of each layer is mutually orthogonal.And when base station is when existing CRS in the resource of relay station transmission data, the pattern of the first demodulated reference signal and the second demodulated reference signal all with the pattern quadrature of CRS.The orthogonal manner here can be a kind of mode in TDM, FDM or CDM or the combination of several modes.
It should be noted that, in Fig. 6, just schematically describe the first demodulated reference signal and the distribution of the second demodulated reference signal in PRB, the corresponding relation of the first demodulated reference signal and antenna port when not embodying the many antennas of R-PDCCH and sending, and the corresponding relation of the second demodulated reference signal and number of layers while also not embodying R-PDSCH multilayer transmission.
Should be appreciated that the pattern example of the first demodulated reference signal as described herein and the second demodulated reference signal is only for explaining and explanation the present invention, and also improper restriction of the present invention not in pairs.
Application example 3
In application example 3, R-PDCCH and R-PDSCH can be multiplexing in same PRB, and R-PDCCH and R-PDSCH take respectively different OFDM symbols in same PRB.As shown in Figure 7, suppose in base station in the resource of relay station transmission data, R-PDCCH is minimum takies 3 OFDM symbols, takies at most 4 OFDM symbols, and R-PDSCH takies all the other OFDM symbols.
In this example, the first demodulated reference signal can only be mapped in the physical resource that R-PDCCH takies, and the second demodulated reference signal can be mapped in the whole possible physical resource in the PRB that has R-PDSCH.Concrete, the situation of the OFDM symbolic number minimum that the first demodulated reference signal may take according to R-PDCCH is shone upon, and in this example, can only be mapped in base station and to relay station, transmit in front 3 the OFDM symbols in the resource of data.The situation that the second demodulated reference signal is all taken by R-PDSCH to the resource in the PRB of relay station transmission data according to base station is shone upon, and in this example, can be mapped in base station in the available resources of all OFDM symbols of relay station transmission data.Figure 7 shows that the first demodulated reference signal and the second demodulated reference signal mapping pattern schematic diagram.Wherein the first demodulated reference signal represents with different filling shapes respectively with the second demodulated reference signal.If base station is used the MBSFN subframe of this community to transmit data to relay station, the CRS in R-PDSCH will not exist.
Further, the first demodulated reference signal is corresponding with the antenna port of R-PDCCH transmission, and the reference signal of each port is mutually orthogonal; The second demodulated reference signal is corresponding with the number of layers of R-PDSCH transmission, and the reference signal of each layer is mutually orthogonal.The pattern of the first demodulated reference signal and the second demodulated reference signal is mutually orthogonal, and when base station is when existing CRS in the resource of relay station transmission data, the pattern of the first demodulated reference signal and the second demodulated reference signal all with the pattern quadrature of CRS.The orthogonal manner here can be a kind of mode in TDM, FDM or CDM or the combination of several modes.
Further, while shining upon the first demodulated reference signal and the second demodulated reference signal according to the method in this example, relay station is before detecting R-PDCCH information, can obtain the resource location that in R-PDCCH territory, the second demodulated reference signal takies, relay station is when blind Detecting R-PDCCH like this, can reject the RE that in R-PDCCH territory, the second demodulated reference signal takies, avoid the second demodulated reference signal for the impact of R-PDCCH blind Detecting.
It should be noted that, in Fig. 7, just schematically describe the first demodulated reference signal and the distribution of the second demodulated reference signal in PRB, the corresponding relation of the first demodulated reference signal and antenna port when not embodying the many antennas of R-PDCCH and sending, and the corresponding relation of the second demodulated reference signal and number of layers while also not embodying R-PDSCH multilayer transmission.
Should be appreciated that the pattern example of the first demodulated reference signal as described herein and the second demodulated reference signal is only for explaining and explanation the present invention, and also improper restriction of the present invention not in pairs.
Application example 4
In application example 4, R-PDCCH and R-PDSCH can be multiplexing in same PRB, and R-PDCCH and R-PDSCH take respectively different OFDM symbols in same PRB.As shown in Figure 6, suppose that in base station the OFDM symbolic number that R-PDCCH takies, according to the data volume adjustment of R-PDCCH, may be 1 or 2 or 3 or 4 OFDM symbol in the resource of relay station transmission data, R-PDSCH takies all the other OFDM symbols.
The performance that control information when in this example, the mapping position of the first demodulated reference signal is taken into account the less and more situation of OFDM symbolic number that R-PDCCH takies simultaneously detects.Concrete, the first demodulated reference signal is mapped in base station and to relay station, transmits in first and the 3rd OFDM symbol in the PRB of R-PDCCH.The situation that the second demodulated reference signal is all taken by R-PDSCH to the resource in the PRB of relay station transmission data according to base station is shone upon, and in this example, can be mapped in base station in the available resources of all OFDM symbols of relay station transmission data.Figure 8 shows that the first demodulated reference signal and the second demodulated reference signal mapping pattern schematic diagram.Wherein the first demodulated reference signal represents with different filling shapes respectively with the second demodulated reference signal.If base station is used the MBSFN subframe of this community to transmit data to relay station, the CRS in R-PDSCH will not exist.In this example, R-PDCCH takies 2 OFDM symbols in the PRB of its transmission, and R-PDSCH takies all the other OFDM symbols.
Further, the first demodulated reference signal is corresponding with the antenna port of R-PDCCH transmission, and the reference signal of each port is mutually orthogonal; The second demodulated reference signal is corresponding with the number of layers of R-PDSCH transmission, and the reference signal of each layer is mutually orthogonal.And when base station is when existing CRS in the resource of relay station transmission data, the pattern of the first demodulated reference signal and the second demodulated reference signal all with the pattern quadrature of CRS.The orthogonal manner here can be a kind of mode in TDM, FDM or CDM or the combination of several modes.
Further, while shining upon the first demodulated reference signal and the second demodulated reference signal according to the method in this example, relay station is before detecting R-PDCCH information, can obtain the resource location that in R-PDCCH territory, the second demodulated reference signal takies, relay station is when blind Detecting R-PDCCH like this, can reject the RE that in R-PDCCH territory, the second demodulated reference signal takies, avoid the second demodulated reference signal for the impact of R-PDCCH blind Detecting.
It should be noted that, in Fig. 8, just schematically describe the first demodulated reference signal and the distribution of the second demodulated reference signal in PRB, the corresponding relation of the first demodulated reference signal and antenna port when not embodying the many antennas of R-PDCCH and sending, and the corresponding relation of the second demodulated reference signal and number of layers while also not embodying R-PDSCH multilayer transmission.
Should be appreciated that the pattern example of the first demodulated reference signal as described herein and the second demodulated reference signal is only for explaining and explanation the present invention, and also improper restriction of the present invention not in pairs.
By embodiments of the invention, provide a kind of base station.Fig. 9 is architecture of base station block diagram of the present invention.As shown in Figure 9, this device comprises: processing module 92 and sending module 94.Processing module 92, for generating the first demodulated reference signal and second demodulated reference signal of repeated link, wherein the first demodulated reference signal does not carry out precoding, coherent demodulation for R-PDCCH, before the second demodulated reference signal transmission, carry out precoding together with relay link downlink business datum, for the coherent demodulation of R-PDSCH; Sending module 94 is connected to processing module 92, the first demodulated reference signal and second demodulated reference signal of the described repeated link generating for transmission processing module 92.
By embodiments of the invention, provide a kind of relay station.Figure 10 is relay station structured flowchart of the present invention.As shown in figure 10, this device comprises: receiver module 102 and processing module 104.Receiver module 102, for receiving repeated link the first demodulated reference signal and the second demodulated reference signal; Processing module 104 is connected to receiver module 102, and for according to described the first demodulated reference signal, demodulation relay link downlink is controlled data; And, according to described the second demodulated reference signal, demodulation relay link downlink business datum.
In sum, by method of the present invention and base station and relay station, solved the mapping problems that R-PDCCH and R-PDSCH adopt different pretreatment modes and the demodulated reference signal under different multiplex modes.And when repeated link exists CRS, the demodulated reference signal that the present invention describes can not disturb with CRS, has avoided the impact on terminal.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, or they are made into respectively to each integrated circuit modules, or a plurality of modules in them or step are made into single integrated circuit module to be realized.Like this, the present invention is not restricted to any specific hardware and software combination.
Certainly; the present invention also can have other various embodiments; in the situation that not deviating from spirit of the present invention and essence thereof; those of ordinary skill in the art are when making according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (11)
1. a sending method for downlink demodulation reference signals of relay link, comprising:
When base station sends relay link downlink control data to relay station, the first demodulated reference signal is sent to described relay station simultaneously; And, when base station sends relay link downlink business datum to relay station, the second demodulated reference signal is sent to described relay station simultaneously;
Wherein,
Described relay link downlink is controlled Deta bearer in relaying Physical Downlink Control Channel R-PDCCH,
Described relay link downlink business datum is carried in relaying Physical Downlink Shared Channel R-PDSCH,
Described the first demodulated reference signal does not carry out precoding, for the coherent demodulation of R-PDCCH;
Before sending, described the second demodulated reference signal carries out precoding together with relay link downlink business datum, for the coherent demodulation of R-PDSCH;
As described R-PDCCH with R-PDSCH is multiplexing while transmitting in a Physical Resource Block, described base station is mapped in described the first demodulated reference signal and the second demodulated reference signal respectively in described Physical Resource Block, wherein, described the second demodulated reference signal is only mapped in the physical resource that in described Physical Resource Block, R-PDSCH takies, or the mapping position of described the second demodulated reference signal is whole described Physical Resource Block.
2. sending method as claimed in claim 1, is characterized in that,
Described base station is mapped in described the first demodulated reference signal in the physical resource that described R-PDCCH takies, more described the first demodulated reference signal is sent to relay station.
3. sending method as claimed in claim 2, is characterized in that,
Described physical resource is Physical Resource Block, or
Described physical resource is whole frequency resources in orthogonal frequency division multiplex OFDM symbol, or
Described physical resource is component frequency resource in OFDM symbol.
4. sending method as claimed in claim 1, is characterized in that,
As described R-PDCCH with R-PDSCH is multiplexing while transmitting in a Physical Resource Block, described the first demodulated reference signal and the second demodulated reference signal are mutually orthogonal, and the mode of quadrature is: time division multiplexing or frequency division multiplexing or both combinations.
5. sending method as claimed in claim 1, is characterized in that,
When described base station sends the first demodulated reference signal, described the first demodulated reference signal is corresponding with the antenna port that described R-PDCCH sends, and the demodulated reference signal that each antenna port is corresponding is mutually orthogonal.
6. sending method as claimed in claim 1, is characterized in that,
When described base station sends the second demodulated reference signal, described the second demodulated reference signal is corresponding with the number of layers that described R-PDSCH sends, and each layer of corresponding demodulated reference signal is mutually orthogonal.
7. sending method as claimed in claim 1, is characterized in that,
While being mapped with public reference signal CRS in the physical resource of the described R-PDCCH of transmission, described the first demodulated reference signal and described public reference signal quadrature;
While being mapped with CRS in the physical resource of the described R-PDSCH of transmission, described the second demodulated reference signal and described public reference signal quadrature.
8. the sending method as described in any one in claim 5～7, is characterized in that,
The mode of described quadrature is: described orthogonal manner is one or several the combination in time division multiplexing or frequency division multiplexing or code division multiplexing.
9. sending method as claimed in claim 1, is characterized in that,
Described relay station is according to described the first demodulated reference signal receiving, and demodulation relay link downlink is controlled data, and, according to described the second demodulated reference signal receiving, demodulation relay link downlink business datum.
10. a base station that sends downlink demodulation reference signals of relay link, is characterized in that, comprising:
Processing module, for generating the first demodulated reference signal and second demodulated reference signal of repeated link, described the first demodulated reference signal does not carry out precoding, coherent demodulation for relaying Physical Downlink Control Channel R-PDCCH, before described the second demodulated reference signal transmission, carry out precoding together with relay link downlink business datum, for the coherent demodulation of relaying Physical Downlink Shared Channel R-PDSCH; As described R-PDCCH with R-PDSCH is multiplexing while transmitting in a Physical Resource Block, described the first demodulated reference signal and the second demodulated reference signal are mapped in respectively in described Physical Resource Block, wherein, described the second demodulated reference signal is only mapped in the physical resource that in described Physical Resource Block, R-PDSCH takies, or the mapping position of described the second demodulated reference signal is whole described Physical Resource Block;
Sending module, for sending described the first demodulated reference signal and the second demodulated reference signal.
11. 1 kinds of relay stations that receive downlink demodulation reference signals of relay link, is characterized in that, comprising:
Receiver module, for receiving the first demodulated reference signal and second demodulated reference signal of repeated link;
As relaying Physical Downlink Control Channel R-PDCCH with relaying Physical Downlink Shared Channel R-PDSCH is multiplexing while transmitting in a Physical Resource Block, described the first demodulated reference signal and the second demodulated reference signal are mapped in respectively in described Physical Resource Block, wherein, described the second demodulated reference signal is only mapped in the physical resource that in described Physical Resource Block, R-PDSCH takies, or the mapping position of described the second demodulated reference signal is whole described Physical Resource Block;
Processing module, for according to described the first demodulated reference signal, demodulation relay link downlink is controlled data; And, according to described the second demodulated reference signal, demodulation relay link downlink business datum;
Described the first demodulated reference signal does not carry out precoding, for the coherent demodulation of R-PDCCH;
Before sending, described the second demodulated reference signal carries out precoding together with relay link downlink business datum, for the coherent demodulation of R-PDSCH;
Described relay link downlink is controlled Deta bearer in R-PDCCH;
Described relay link downlink business datum is carried in R-PDSCH.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910160647.XA CN101964676B (en) | 2009-07-22 | 2009-07-22 | Method and base station for sending relay link downlink demodulation reference signal and relay station |
| PCT/CN2010/074850 WO2011009371A1 (en) | 2009-07-22 | 2010-06-30 | Method for sending downlink demodulation reference signal, base station and relay station thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910160647.XA CN101964676B (en) | 2009-07-22 | 2009-07-22 | Method and base station for sending relay link downlink demodulation reference signal and relay station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101964676A CN101964676A (en) | 2011-02-02 |
| CN101964676B true CN101964676B (en) | 2014-04-09 |
Family
ID=43498762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910160647.XA Active CN101964676B (en) | 2009-07-22 | 2009-07-22 | Method and base station for sending relay link downlink demodulation reference signal and relay station |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101964676B (en) |
| WO (1) | WO2011009371A1 (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9065527B2 (en) | 2011-02-22 | 2015-06-23 | Panasonic Intellectual Property Corporation Of America | Relay station, base station and communication method |
| WO2012145891A1 (en) * | 2011-04-25 | 2012-11-01 | Alcatel Lucent | Apparatus for enabling ue-specific pdcch and ue device for identifying such pdcch |
| CN102882566A (en) * | 2011-07-12 | 2013-01-16 | 华为技术有限公司 | Method and equipment for reducing transmission interlamination interference in multi-user MIMO (Multiple Input Multiple Output) system |
| CN102904669B (en) * | 2011-07-29 | 2016-05-18 | 上海贝尔股份有限公司 | Precoding Physical Downlink Control Channel reference signal and blind interpretation method and device |
| WO2013027322A1 (en) * | 2011-08-23 | 2013-02-28 | 日本電気株式会社 | Communication device, signal superimposing circuit, and signal superimposing method |
| CN103248586A (en) * | 2012-02-13 | 2013-08-14 | 华为技术有限公司 | Methods for transmitting and detecting control signaling, network equipment and user equipment |
| JP6191997B2 (en) * | 2012-03-06 | 2017-09-06 | シャープ株式会社 | Mobile station apparatus, base station apparatus, communication method, and integrated circuit |
| WO2014019177A1 (en) * | 2012-08-01 | 2014-02-06 | 华为技术有限公司 | Transmission method for control channel, base station and terminal |
| CN103781160B (en) * | 2012-10-23 | 2017-06-20 | 华为技术有限公司 | The transmission method and device of data |
| CN104219021A (en) * | 2013-05-31 | 2014-12-17 | 中兴通讯股份有限公司 | Downlink data transmission method, apparatus, and system for virtual multi-antenna system |
| CN106961298A (en) * | 2016-01-08 | 2017-07-18 | 北京信威通信技术股份有限公司 | A kind of multi-antenna sending method |
| KR102184771B1 (en) | 2017-11-13 | 2020-11-30 | 엘지전자 주식회사 | Method for transmitting and receiving data in wireless communication system and apparatus therefor |
| WO2020087465A1 (en) | 2018-11-01 | 2020-05-07 | Panasonic Intellectual Property Corporation Of America | Transmitting apparatus, receiving apparatus and methods thereof |
| CN112492274B (en) * | 2020-11-26 | 2021-08-17 | 江南大学 | National secret encryption transmission equipment based on common network camera |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1748383A (en) * | 2002-12-16 | 2006-03-15 | 北方电讯网络有限公司 | Virtual mimo communication system with uplink space-time codes of colabourated mobile terminals |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101141171B (en) * | 2006-09-08 | 2011-07-06 | 华为技术有限公司 | Radio communication device, system and method |
-
2009
- 2009-07-22 CN CN200910160647.XA patent/CN101964676B/en active Active
-
2010
- 2010-06-30 WO PCT/CN2010/074850 patent/WO2011009371A1/en active Application Filing
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1748383A (en) * | 2002-12-16 | 2006-03-15 | 北方电讯网络有限公司 | Virtual mimo communication system with uplink space-time codes of colabourated mobile terminals |
Non-Patent Citations (2)
| Title |
|---|
| Nortel Network.Control Channel and Data Channel Design for Relay Link in LTE-Advanced.《TSG-RAN1 #55bis,R1-090153》.2009, * |
| Sharp.Backward compatible design of downlink reference signals in LTE-Advanced.《3GPP TSG RAN WG1 Meeting #55bis,R1-090023》.2009, * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101964676A (en) | 2011-02-02 |
| WO2011009371A1 (en) | 2011-01-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101964676B (en) | Method and base station for sending relay link downlink demodulation reference signal and relay station | |
| CN102088434B (en) | Transmitting method of demodulation reference signal, sequence generating method and transmitting and receiving devices | |
| CN102055702B (en) | Transmission method, base station, relay station and system for down link demodulation reference signal | |
| CN102036301B (en) | Method and device for transmitting downlink demodulation reference signals of relay link and relay system | |
| CN102113398B (en) | Resource allocation method for backhaul link and access link in wireless communication system including relay | |
| CN102884732B (en) | For the apparatus and method of interleaving data in relaying physical downlink control channel (R-PDCCH) | |
| EP2378675B1 (en) | Signal transmission method using mbsfn subframe in radio communication system | |
| JP5759554B2 (en) | Method and apparatus for determining relay link resource element group | |
| CN102265527B (en) | Method and apparatus for transmitting signal in wireless communication system | |
| CN102474378B (en) | Apparatus for transmitting and receiving control information and system information for repeaters and method thereof | |
| CN101124751B (en) | Wireless communication method, relay station apparatus, and wireless transmitting apparatus | |
| CN102668409B (en) | The backhaul downlink signal decoding method of relay station and the relay station of use the method | |
| KR101298959B1 (en) | A method and device for pilot mapping in multiplexing mode of unicast and broadcast/multicast services | |
| CN102714570B (en) | For the method and apparatus via relay backhaul link transmission signal | |
| CN102082600A (en) | Relay link downlink control information configuration method, transmission base station, relay station and method | |
| US20120147810A1 (en) | Flexible Ways to Indicate Downlink/Uplink Backhaul Subframe Configurations in a Relay System | |
| CN102648592A (en) | Reference signal transmission method and apparatus in wireless communication system including relay station | |
| CN102449929A (en) | Design of control and data channels for advanced relay operation | |
| CN105187113A (en) | Relay node and method for receiving R-PDCCH implemented in relay node | |
| CN105227285A (en) | Send and receive the method and apparatus of reference signal | |
| KR20110023830A (en) | The method for transceiving a signal at a mobile station using predetermined tdd frame structure in a wireless communication system | |
| CN104919722A (en) | Relay system for moving object | |
| US20100067592A1 (en) | Ofdma-based operation of a wireless subscriber terminal in a plurality of cells | |
| EP2490344B1 (en) | Wireless communication system for high-speed vehicle travelling over fixed path | |
| CN105281880A (en) | Method and apparatus for transmitting signal via relay backhaul link |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191223 Address after: 314400 No.11, Weisan Road, Nongfa District, Chang'an Town, Haining City, Jiaxing City, Zhejiang Province Patentee after: Haining hi tech Zone Science and Innovation Center Co., Ltd Address before: 518057 Department of law, Zhongxing building, South hi tech Industrial Park, Nanshan District hi tech Industrial Park, Guangdong, Shenzhen Patentee before: ZTE Communications Co., Ltd. |