CN102201857A - Control signaling transmission method, system and device for relay link - Google Patents
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Abstract
The invention discloses a control signaling transmission method for a relay link. The method comprises the following steps that: a relay node (RN) receives a downlink backhaul sub-frame from an evolved node B (eNB), wherein the downlink backhaul sub-frame comprises a first area used for transmitting delay-sensitive signaling and a second area used for transmitting delay-insensitive signaling, wherein the first area comprises the transmission of a relay physical downlink control channel (R-PDCCH) and a relay physical downlink shared channel (R-PDSCH), and the second area only comprises the transmission of the R-PDCCH; and the RN resolves the downlink backhaul sub-frame to obtain corresponding control signaling. The embodiment of the invention integrates the advantages of time division multiplexing (TDM) and frequency division multiplexing (FDM) R-PDCCH designing so as to optimize the system efficiency.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of control signaling method, system and device of repeated link.
Background technology
In 3GPP Long Term Evolution LTE-Advanced system, will adopt the service quality and the Extended Cell of the method raising Cell Edge User of relaying (Relay) cooperation transmission to cover.The introducing of via node makes the Radio Link based on the mobile communication system of Relay have three: eNB (evolution base station)-Hong UE (User Equipment, subscriber equipment) direct projection link (direct link), the access link (access link) of the back haul link of eNB-RN (backhaul link) and RN-relay UE, therefore consider the signal interference-limited of radio communication, three links need use the Radio Resource of quadrature.On same frequency range, for fear of self-interference, via node can not transmit and receive data simultaneously.In LTE-A, via node can as shown in Figure 1, carry out the repeated link downlink transfer for utilizing the MBSFN subframe in the prior art by the mode and the mutual backhaul data of its donor eNB of MFSBN subframe.
Via node (RN) sends PDCCH (grouping Dedicated Control Channel) to the user terminal (being called R-UE) of its service on one or two OFDM symbols in a MBSFN subframe.On back several OFDM symbols of this MBSFN subframe, via node receives control (being called R-PDCCH) and the data (being called R-PDSCH) from donor eNB, as shown in Figure 2, is P-PDCCH and the R-PDSCH distribution schematic diagram of a kind of RN in the prior art.On frequency domain, R-PDCCH can transmission in some Resource Block that sets in advance set.Different via nodes can be shared these R-PDCCH Resource Block, and obtains oneself down dispatch information (DL grant) and uplink scheduling information (UL grant) on this Resource Block by blind check.The resource allocation of the R-PDSCH of a via node is indicated by its down dispatch information.The base station can be dispatched grand UE (macro-UE) and via node simultaneously in a subframe, as long as their resource allocation is a quadrature.The downlink data of Macro-UE is called PDSCH, as shown in Figure 2.
Wherein, R-PDCCH shown in Figure 2 shares (common) by a plurality of via nodes, yet R-PDCCH also can be by a via node special use (RN specific), and the P-PDCCH and the R-PDSCH that are illustrated in figure 3 as another kind of RN in the prior art distribute schematic diagram.Wherein the R-PDCCH Resource Block of RN1 is the R-PDCCH by the special RN1 of giving of base station configuration.On the R-PDCCH of RN1, can transmit control signaling about RN1, comprise DL grant, UL grant, or the like.Other R-PDCCH resource can also exist.These R-PDCCH resources can be shared, and are for example shared by RN2 and RN3, as shown in Figure 3.
Need to prove,, perhaps receive the conversion of transmission, so need be reserved some change-over times because via node will be done a subframe domestic demand and send to reception.On the basis that does not influence the present invention's realization, for brevity, do not consider these change-over times in this article, therefore yet not shown these change-over times in Fig. 2 and Fig. 3.
In example as above, there is the relation of Time Division Multiplexing between the R-PDCCH resource of a RN and the R-PDSCH resource, promptly R-PDCCH can take different OFDM symbols with R-PDSCH.
The existing another kind of thinking that has proposed be between one R-PDCCH and the R-PDSCH for the relation of frequency division multiplexing (FDM), be illustrated in fig. 4 shown below, be R-PDSCH in the prior art and R-PDCCH frequency division multiplexing schematic diagram.In this case, R-PDCCH takies all OFDM symbols of one or more complete PRB, and R-PDSCH takies the PRB resource different with R-PDCCH.Equally, R-PDCCH also can be Common's or RN-specific.
At present also not to the detailed design scheme of R-PDCCH.The R-PDCCH design of Common is adopted in some company's suggestions, and benefit is the multiplexing control areas of many RN, and resource overhead is less.And the design of RN-specific also has some companies to be inclined to, and benefit is to select suitable PRB to transmit according to the channel conditions of RN.For the multiplexing problem of R-PDSCH and R-PDCCH, R-PDCCH takies complete PRB in the FDM scheme, designs comparatively simple; R-PDCCH takies preceding several OFDM symbols of each PRB in the TDM scheme, and RN can promptly begin the demodulation sign indicating number after receiving the R-PDCCH symbol like this, does not need sub-frame end by the time, therefore than the FDM mode littler time-delay is arranged.
As can be seen, more existing schemes cut both ways, and therefore also need to be optimized.
Summary of the invention
Purpose of the present invention is intended to solve at least one of above-mentioned technological deficiency, has proposed a kind of control signaling method, system and device of repeated link.
For achieving the above object, one aspect of the present invention has proposed a kind of control signaling method of repeated link, may further comprise the steps: via node RN receives the descending backhaul subframe that evolution base station eNB sends, described descending backhaul subframe comprises and comprises transmission to the first area of the signaling of delay sensitive be used to send second area to the insensitive signaling of time delay, wherein, comprise the transmission of R-PDCCH channel and R-PDSCH channel in the described first area, described second area only comprises the transmission of R-PDCCH channel; Described RN resolves described descending backhaul subframe, obtains the control corresponding signaling.
The present invention has also proposed a kind of control signaling transmitting system of repeated link on the other hand, comprise eNB and RN, described eNB, be used for sending descending backhaul subframe to described RN, described descending backhaul subframe comprises and comprises transmission to the first area of the signaling of delay sensitive be used to send second area to the insensitive signaling of time delay, wherein, comprise the transmission of R-PDCCH channel and R-PDSCH channel in the described first area, described second area only comprises the transmission of R-PDCCH channel; Described RN is used for the descending backhaul subframe that receives is resolved, and obtains the control corresponding signaling.
The present invention has also proposed a kind of eNB on the other hand, comprise descending backhaul sub-frame configuration module and sending module, described descending backhaul sub-frame configuration module, be used for descending backhaul subframe is configured, described descending backhaul subframe comprises and comprises transmission to the first area of the signaling of delay sensitive be used to send second area to the insensitive signaling of time delay, wherein, comprise the transmission of R-PDCCH channel and R-PDSCH channel in the described first area, described second area only comprises the transmission of R-PDCCH channel; Described sending module is used for the descending backhaul subframe of configuration is sent to corresponding RN.
Further aspect of the present invention has also proposed a kind of RN, comprise receiver module and parsing module, described receiver module, be used to receive the descending backhaul subframe that eNB sends, described descending backhaul subframe comprises and comprises transmission to the first area of the signaling of delay sensitive be used to send second area to the insensitive signaling of time delay, wherein, comprise the transmission of R-PDCCH channel and R-PDSCH channel in the described first area, described second area only comprises the transmission of R-PDCCH channel; Described parsing module is used for described descending backhaul subframe is resolved, and obtains the control corresponding signaling.
By the embodiment of the invention, the advantage of compatible TDM and FDM R-PDCCH design makes system effectiveness can reach optimum.
Aspect that the present invention adds and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
Fig. 1 utilizes the MBSFN subframe to carry out the repeated link downlink transfer in the prior art;
Fig. 2 is that P-PDCCH and the R-PDSCH of a kind of RN in the prior art distributes schematic diagram;
Fig. 3 is that P-PDCCH and the R-PDSCH of another kind of RN in the prior art distributes schematic diagram;
Fig. 4 is R-PDSCH and a R-PDCCH frequency division multiplexing schematic diagram in the prior art;
Fig. 5 is the control signaling method flow chart of the repeated link of the embodiment of the invention;
Fig. 6 is that the P-PDCCH and the R-PDSCH of the embodiment of the invention distributes schematic diagram:
Fig. 7 is the structure chart of the control signaling transmitting system of repeated link of the present invention.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Below by the embodiment that is described with reference to the drawings is exemplary, only is used to explain the present invention, and can not be interpreted as limitation of the present invention.
The present invention mainly is whether for example to control signaling to the sensitivity etc. of delaying time according to different PDCCH type and purposes, thereby can adopt the R-PDCCH structure and the multiplex mode of each self application, the system that the makes performance that is optimized.
As shown in Figure 5, control signaling method flow chart for the repeated link of the embodiment of the invention, in this embodiment, for a RN, in the territory, noncontrolled area of the MBSFN subframe that is used for the downlink relay link transmission, exist two parts to send the RN control area of R-PDCCH, first area and second area specifically are described in detail in conjunction with the sending method flow process.
Step 501, RN receives the descending backhaul subframe that eNB sends, this descending backhaul subframe comprises and comprises transmission to the first area of the signaling of delay sensitive be used to send second area to the insensitive signaling of time delay, wherein, comprise the transmission of R-PDCCH channel and R-PDSCH channel in the first area, second area only comprises the transmission of R-PDCCH channel.
Below first area (zone one) and second area (zone two) are described in detail, as shown in Figure 6, be the P-PDCCH and the R-PDSCH distribution schematic diagram of the embodiment of the invention:
Zone one:
Exist two kinds of channels of R-PDCCH and R-PDSCH to send in zone one, both are time-multiplexed relation (TDM), and wherein R-PDCCH takies R-PDSCH OFDM symbol transmission before, also can have following characteristic:
A) zone one is the RN-specific zone, and promptly the zone one of each RN is to distribute separately.
B) shared frequency domain resource position in system, zone one is notified by the exclusive high-level signaling of RN, the mode that concrete PRB indicating mode can adopt bitmap that each PRB is indicated separately also can adopt any one the indicating mode among 0/,1/2 three kind of the descending PRB resource allocation Type that defines among the LTE Rel-8 TS36.213.
C) the OFDM symbolic number that takies on time domain of described R-PDCCH can be stipulated by agreement, perhaps by the semi-static configuration of high-level signaling.
D) R-PDCCH zone only the physical layer dispatch of transmission delay sensitivity, for example descending scheduling signaling (DL grant) in described regional one.For example, send on a part of running time-frequency resource of described DL grant R-PDCCH part in zone one for a RN.
E) a kind of preferred implementation, R-PDCCH that sends in the above-mentioned zone one and R-PDSCH are at same RN, and promptly the R-PDSCH of other RN does not send in this zone.
Zone two:
Only exist the R-PDCCH channel to send in the zone two, take complete one or more PRB, also can have following characteristic:
F) zone two is the Common zone, and promptly the resource in the zone two can be public by a plurality of RN.
G) shared frequency domain resource position in system, zone two is notified to RN by high-level signaling, can adopt the broadcast signaling mode, also can adopt the exclusive high-level signaling mode of RN.The mode that concrete PRB indicating mode can adopt bitmap that each PRB is indicated separately also can adopt any one the indicating mode among 0/,1/2 three kind of the descending PRB resource allocation Type that defines among the LTE Rel-8 TS36.213.
H) the OFDM symbolic number that takies on time domain of described R-PDCCH can be stipulated by agreement, perhaps by the semi-static configuration of high-level signaling.
I) the R-PDCCH zone insensitive physical layer dispatch of transmission delay only in described regional two, uplink scheduling signaling (UL grant) for example, or the dispatch of following RNTI scrambling: RA-RNTI, SI-RNTI, P-RNTI, TPC-RNTI etc.
J) in the zone two if there are many dispatchs, then interweave, and in zone one, do not interweave between the dispatch.
Step 502, RN resolves descending backhaul subframe, obtains the control corresponding signaling.
In one embodiment of the invention, also proposed with the as above method of the shared PRB resource in zone one and zone two of high-level signaling notice, particularly, RN can be known by system information or the exclusive high-level signaling of RN initial the access in the Donor eNB process, be similar to the initial access of UE in this process.Set up the Serving cell of self at RN after, RN can be given by transmitting relevant high-level signaling in the descending backhaul subframe in the base station, notifies the change in resources in these two zones (one of them or two).
In embodiments of the present invention, all comprise a search volume in above-mentioned first area and second area, as shown in Figure 6, RN carries out the blind Detecting of R-PDCCH respectively in each search volume.Wherein, search volume 1 is the R-PDCCH zone in the above-mentioned zone one, RN blind check descending scheduling signaling (DL grant) only in this space; Search volume 2 is an above-mentioned zone two, RN is blind check uplink scheduling signaling in this space, the perhaps dispatch form of other that may exist, UL grant for example, or the dispatch of following RNTI scrambling: RA-RNTI, SI-RNTI, P-RNTI, TPC-RNTI etc.
The embodiment of the invention has also proposed a kind of control signaling transmitting system of repeated link, as shown in Figure 7, is the structure chart of the control signaling transmitting system of repeated link of the present invention.This system comprises eNB 100 and RN 200.ENB 100 is used for sending descending backhaul subframe to RN 200, this descending backhaul subframe comprises and comprises transmission to the first area of the signaling of delay sensitive be used to send second area to the insensitive signaling of time delay, wherein, comprise the transmission of R-PDCCH channel and R-PDSCH channel in the described first area, described second area only comprises the transmission of R-PDCCH channel.RN 200 is used for the descending backhaul subframe that receives is resolved, and obtains the control corresponding signaling.
In one embodiment of the invention, eNB 100 comprises descending backhaul sub-frame configuration module 110 and sending module 120.Descending backhaul sub-frame configuration module 110 is used for descending backhaul subframe is configured, this descending backhaul subframe comprises and comprises transmission to the first area of the signaling of delay sensitive be used to send second area to the insensitive signaling of time delay, wherein, comprise the transmission of R-PDCCH channel and R-PDSCH channel in the described first area, described second area only comprises the transmission of R-PDCCH channel.Sending module 120 is used for the descending backhaul subframe of configuration is sent to corresponding RN 200.
In one embodiment of the invention, in described first area, adopt time-multiplexed mode to send R-PDCCH and R-PDSCH, wherein R-PDCCH takies R-PDSCH OFDM symbol transmission before.
Wherein, described first area is the RN-specific zone, and described second area is the common area.
Wherein, when a R-PDCCH region memory during, if in described first area, do not interweave between then to dispatch at many dispatchs; If in described second area, all interweave between then to dispatch.
In one embodiment of the invention, RN 200 comprises receiver module 210 and parsing module 220.Receiver module 210 is used to receive the descending backhaul subframe that eNB 100 sends, descending backhaul subframe comprises and comprises transmission to the first area of the signaling of delay sensitive be used to send second area to the insensitive signaling of time delay, wherein, comprise the transmission of R-PDCCH channel and R-PDSCH channel in the first area, described second area only comprises the transmission of R-PDCCH channel.Parsing module 220 is used for descending backhaul subframe is resolved, and obtains the control corresponding signaling.
Wherein, all comprise a search volume in described first area and second area, described RN carries out the blind Detecting of R-PDCCH respectively in each search volume.Particularly, RN searching downlink dispatch only in the search volume of first area, search uplink scheduling signaling, perhaps the control signaling of the other types that may exist in the search volume of second area.
By the embodiment of the invention, the advantage of compatible TDM and FDM R-PDCCH design makes system effectiveness can reach optimum.
Although illustrated and described embodiments of the invention, for the ordinary skill in the art, be appreciated that without departing from the principles and spirit of the present invention and can carry out multiple variation, modification, replacement and modification that scope of the present invention is by claims and be equal to and limit to these embodiment.
Claims (27)
1. the control signaling method of a repeated link is characterized in that, may further comprise the steps:
Via node RN receives the descending backhaul subframe that evolution base station eNB sends, described descending backhaul subframe comprises and comprises transmission to the first area of the signaling of delay sensitive be used to send second area to the insensitive signaling of time delay, wherein, comprise the transmission of R-PDCCH channel and R-PDSCH channel in the described first area, described second area only comprises the transmission of R-PDCCH channel;
Described RN resolves described descending backhaul subframe, obtains the control corresponding signaling.
2. the control signaling method of repeated link as claimed in claim 1, it is characterized in that, wherein, in described first area, adopt time-multiplexed mode to send R-PDCCH and R-PDSCH, wherein R-PDCCH takies R-PDSCH OFDM symbol transmission before.
3. the control signaling method of repeated link as claimed in claim 2 is characterized in that, wherein, described first area is the RN-specific zone.
4. the control signaling method of repeated link as claimed in claim 2 is characterized in that, wherein, the signaling of delay sensitive is comprised the descending scheduling signaling.
5. the control signaling method of repeated link as claimed in claim 4 is characterized in that, for a RN, sends on a part of running time-frequency resource of described descending scheduling signaling R-PDCCH part in described first area.
6. as the control signaling method of each described repeated link of claim 1-5, it is characterized in that wherein, R-PDCCH that sends in the described first area and R-PDSCH are at same RN.
7. the control signaling method of repeated link as claimed in claim 1 is characterized in that, described second area is the common area.
8. the control signaling method of repeated link as claimed in claim 7 is characterized in that, the insensitive signaling of time delay is comprised uplink scheduling signaling, RA-RNTI, SI-RNTI, P-RNTI, TPC-RNTI.
9. the control signaling method of repeated link as claimed in claim 1 is characterized in that, also comprises:
Described eNB independently notifies the described first area and the second shared frequency domain resource position by high-level signaling to described RN.
10. the control signaling method of repeated link as claimed in claim 9 is characterized in that, describedly independently notifies the described first area and the second shared frequency domain resource position to comprise by high-level signaling to RN:
The mode that adopts bitmap that each PRB is indicated separately perhaps adopts any one the indicating mode among 0/,1/2 three kind of the descending PRB resource allocation Type that defines among the LTE Rel-8TS36.213.
11. the control signaling method of repeated link as claimed in claim 9 is characterized in that,
When described RN initially inserted, described eNB notified described first area and the shared frequency domain resource position of second area by system information or the exclusive high-level signaling of RN.
12. control signaling method as claim 9 or 10 described repeated links, it is characterized in that, set up the Serving cell of self at described RN after, described eNB gives RN by transmitting relevant high-level signaling in the descending backhaul subframe, notifies the change in resources situation of described first area and/or second area.
13. the control signaling method of repeated link as claimed in claim 1 is characterized in that,
The OFDM symbolic number that R-PDCCH in described first area and the second area takies on time domain is stipulated by agreement, perhaps by the semi-static configuration of high-level signaling.
14. the control signaling method of repeated link as claimed in claim 1 is characterized in that, when a R-PDCCH region memory during at many dispatchs,
If in described first area, do not interweave between then to dispatch;
If in described second area, all interweave between then to dispatch.
15. the control signaling method of repeated link as claimed in claim 1 is characterized in that, wherein, all comprises a search volume in described first area and second area, described RN carries out the blind Detecting of R-PDCCH respectively in each search volume.
16. the control signaling method of repeated link as claimed in claim 15, it is characterized in that, wherein, described RN searching downlink dispatch only in the search volume of first area, search uplink scheduling signaling, perhaps the control signaling of the other types that may exist in the search volume of second area.
17. the control signaling transmitting system of a repeated link is characterized in that, comprises eNB and RN,
Described eNB, be used for sending descending backhaul subframe to described RN, described descending backhaul subframe comprises and comprises transmission to the first area of the signaling of delay sensitive be used to send second area to the insensitive signaling of time delay, wherein, comprise the transmission of R-PDCCH channel and R-PDSCH channel in the described first area, described second area only comprises the transmission of R-PDCCH channel;
Described RN is used for the descending backhaul subframe that receives is resolved, and obtains the control corresponding signaling.
18. an eNB is characterized in that, comprises descending backhaul sub-frame configuration module and sending module,
Described descending backhaul sub-frame configuration module, be used for descending backhaul subframe is configured, described descending backhaul subframe comprises and comprises transmission to the first area of the signaling of delay sensitive be used to send second area to the insensitive signaling of time delay, wherein, comprise the transmission of R-PDCCH channel and R-PDSCH channel in the described first area, described second area only comprises the transmission of R-PDCCH channel;
Described sending module is used for the descending backhaul subframe of configuration is sent to corresponding RN.
19. eNB as claimed in claim 18 is characterized in that, in described first area, adopts time-multiplexed mode to send R-PDCCH and R-PDSCH, wherein R-PDCCH takies R-PDSCH OFDM symbol transmission before.
20. eNB as claimed in claim 18 is characterized in that, described first area is the RN-specific zone, and described second area is the common area.
21. eNB as claimed in claim 18 is characterized in that, when a R-PDCCH region memory during at many dispatchs, if do not interweave between then to dispatch in described first area; If in described second area, all interweave between then to dispatch.
22. a RN is characterized in that, comprises receiver module and parsing module,
Described receiver module, be used to receive the descending backhaul subframe that eNB sends, described descending backhaul subframe comprises and comprises transmission to the first area of the signaling of delay sensitive be used to send second area to the insensitive signaling of time delay, wherein, comprise the transmission of R-PDCCH channel and R-PDSCH channel in the described first area, described second area only comprises the transmission of R-PDCCH channel;
Described parsing module is used for described descending backhaul subframe is resolved, and obtains the control corresponding signaling.
23. RN as claimed in claim 22 is characterized in that, in described first area, adopts time-multiplexed mode to send R-PDCCH and R-PDSCH, wherein R-PDCCH takies R-PDSCH OFDM symbol transmission before.
24. RN as claimed in claim 22 is characterized in that, described first area is the RN-specific zone, and described second area is the common area.
25. RN as claimed in claim 22 is characterized in that, when a R-PDCCH region memory during at many dispatchs, if do not interweave between then to dispatch in described first area; If in described second area, all interweave between then to dispatch.
26. RN as claimed in claim 22 is characterized in that, wherein, all comprises a search volume in described first area and second area, described RN carries out the blind Detecting of R-PDCCH respectively in each search volume.
27. RN as claimed in claim 22, it is characterized in that, wherein, described RN searching downlink dispatch only in the search volume of first area, search uplink scheduling signaling, perhaps the control signaling of the other types that may exist in the search volume of second area.
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| CN110168943A (en) * | 2016-11-04 | 2019-08-23 | 瑞典爱立信有限公司 | Control information is sent to link using more than one wave beam |
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| CN102378366A (en) * | 2011-09-30 | 2012-03-14 | 中兴通讯股份有限公司 | Resource position notifying method and system of control signaling |
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| CN110168943A (en) * | 2016-11-04 | 2019-08-23 | 瑞典爱立信有限公司 | Control information is sent to link using more than one wave beam |
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| CN102201857B (en) | 2013-10-16 |
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