CN102170646B - Method, system and device for configuring backhaul link resources of relay system - Google Patents
Method, system and device for configuring backhaul link resources of relay system Download PDFInfo
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- CN102170646B CN102170646B CN201010115653.6A CN201010115653A CN102170646B CN 102170646 B CN102170646 B CN 102170646B CN 201010115653 A CN201010115653 A CN 201010115653A CN 102170646 B CN102170646 B CN 102170646B
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Abstract
The invention provides a method for configuring backhaul link resources of a relay system. The method comprises the following steps: an evolved NodeB (eNB) configures N continuous physical resource blocks (PRBs) according to the number of demodulation pilot frequency (DMRS) ports, and performs control channel configuration by taking the N continuous PRBs as a basic resource unit; the eNB informs a relay node (RN) of the DMRS port number and the configuration number N, and sends an R-PDCCH (reverse packet data control channel) to the RN; and the RN detects the R-PDCCH according to the number of the DMRS ports and the configuration number N. The embodiment of the invention can ensure that the inner resource units of the R-PDCCH dynamically change along with the number of the DMRS ports and the current R8 resource mapping mode can be reused for performing REG (range extender with gain) mapping.
Description
Technical field
The present invention relates to mobile communication technology field, particularly a kind of resource allocation method of relay system back haul link, system and device.
Background technology
As shown in Figure 1, be the schematic network structure of LTE-A system.In the drawings, eNB (evolution base station) is connected to core net by wave point, and RN (Relay Node, via node) is connected to eNB by wave point, and UE (user terminal) is connected to RN or eNB by wave point; RN is back haul link to the link of eNB, and RN is access link to the link of UE.
At present, there are two kinds of links in back haul link, i.e. the access link of RN to the backhaul link (back haul link) of eNB and RN to UE.Zone definitions is the control channel (R-PDCCH) that eNB sends to RN on backhaul link, and the Physical Shared Channel (R-PDSCH) that eNB sends to RN on backhaul link.
Determine at present based on CDM-T (time domain code division multiplexing) DMRS (being demodulation pilot frequency) pilot frequency configuration pattern as shown in Figure 2, demodulation pilot frequency wherein adopts the mode of CDM-T, two pilot tone point signal utilization codes that time domain is adjacent are assigned to carry out multiplexing.In Fig. 2, provided the position that the public guide frequency of 4 ports takies.
For the control channel of backhaul link, the feature of its R-PDCCH is the service for a plurality of relay, has wherein comprised the control information of a plurality of relay, can notify the relevant control signaling of a plurality of relay simultaneously.R-PDCCH has generally carried out interweaving between a plurality of relay user data, and is dispersed on wider frequency band and avoids the deep fade in certain frequency band, utilizes large frequency bandwidth to obtain frequency diversity gain simultaneously.This shows the detection performance that the redundancy that R-PDCCH channel usage is larger obtains.
Between R-PDCCH and R-PDSCH, there are two kinds of multiplex modes at present, i.e. TDM (time division multiplexing) and FDM (frequency division multiplexing) mode.Fig. 3 is the multiplexing mode of FDM, the multiplexing schematic diagram that Fig. 4 is TDM+FDM.
When R-PDSCH and R-PDCCH carry out FDM when multiplexing, R-PDSCH and R-PDCCH have taken different PRB, like this in each PRB, or are R-PDSCH, or are R-PDCCH channel.
When R-PDSCH and R-PDCCH carry out FDM+TDM when multiplexing, it is inner that R-PDCCH is positioned at the part PRB that R-PDSCH takies, and in these PRB, has R-PDSCH and R-PDCCH channel so simultaneously.
The shortcoming of prior art is: owing to may having dedicated pilot (DMRS) in the shared RE region of R-PDCCH channel, and the port number of DMRS may change, when these port numbers change, to cause the variation of R-PDCCH internal resource unit (RE) number, and then cause the inconsistent of R-PDCCH resource mapping.And no matter R-PDCCH and R-PDSCH carry out the multiplexing of the multiplexing or FDM of TDM+FDM, capital occurs that R-PDCCH region memory is in the situation of DMRS pilot tone port, in this case, as shown in Figure 2, the RE number that wherein DMRS pilot tone may take in an OFDM symbol is 3 or 6, remaining like this RE just can not just configure to an integer REG, the resource allocation method that therefore can not reuse current R8 completely, and by the wasting of resources causing to a certain degree.
Summary of the invention
Object of the present invention is intended at least one of solve the problems of the technologies described above, and the variation particularly solving due to DMRS port number causes the inconsistent problem of R-PDCCH resource mapping.
To achieve these goals, one aspect of the present invention proposes a kind of relay system back haul link resource allocation method, comprises the following steps:
Enode eNB configures N continuous Physical Resource Block PRB according to the number of demodulation pilot frequency DMRS port, and carries out control channel configuration with described N continuous PRBWei basic resources unit;
Described eNB notifies the number of described DMRS port and described configured number N to via node RN, and described R-PDCCH is sent to described RN; With
Described RN carries out the detection of R-PDCCH according to the number of described DMRS port and described configured number N.
The present invention has also proposed a kind of relay system back haul link resource configuration system on the other hand, comprises eNB and RN,
Described eNB, for configure N continuous PRB according to the number of DMRS port, and carry out control channel configuration with described N continuous PRBWei basic resources unit, and the number of described DMRS port and described configured number N are notified to via node RN, and described R-PDCCH is sent to described RN; With
Described RN, for carrying out the detection of R-PDCCH according to the number of described DMRS port.
Further aspect of the present invention has also proposed a kind of eNB, comprising:
Control channel configuration module, for configure N continuous PRB according to the number of DMRS port, and carries out control channel configuration with described N continuous PRBWei basic resources unit; With
Sending module, for the number of described DMRS port and described configured number N are notified to RN, and sends to described RN by described R-PDCCH.
Further aspect of the present invention has also proposed a kind of RN, comprising:
Receiver module, for receiving number and the configured number N of the DMRS port of eNB transmission, and R-PDCCH;
Detection module, for carrying out the detection of R-PDCCH according to the number of described DMRS port and described configured number N.
The embodiment of the present invention can guarantee that R-PDCCH internal resource unit is with the port number dynamic change of DMRS, thereby the resource mapping method that guarantees to reuse current R8 is carried out the mapping of REG.And by the embodiment of the present invention, reduced the complexity of standard design, a plurality of continuous PRB also can improve the accuracy of R-PDCCH channel estimating in addition, thereby effectively improve the performance of R-PDCCH Channel Detection.
The aspect that the present invention is additional and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of the present invention and advantage will become from the following description of the accompanying drawings of embodiments and obviously and easily understand, wherein:
Fig. 1 is the schematic network structure of LTE-A system;
Fig. 2 for determine at present based on CDM-T (time domain code division multiplexing) DMRS (being demodulation pilot frequency) pilot frequency configuration pattern;
Fig. 3 is the multiplexing mode schematic diagram of FDM;
Fig. 4 is the multiplexing schematic diagram of TDM+FDM;
Fig. 5 is the distribution condition while having 3 RE in the next OFDM symbol of the multiplexed situation of embodiment of the present invention FDM+TDM;
Fig. 6 is the distribution condition while having 6 RE in the next OFDM symbol of the multiplexed situation of embodiment of the present invention FDM+TDM;
Fig. 7 is the distribution condition while having 3 RE in the next OFDM symbol of the multiplexed situation of embodiment of the present invention FDM;
Fig. 8 is the distribution condition while having 6 RE in the next OFDM symbol of the multiplexed situation of embodiment of the present invention FDM;
Fig. 9 is the relay system back haul link resource allocation method flow chart of the embodiment of the present invention;
Figure 10 is the structure chart of the relay system back haul link resource configuration system of the embodiment 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 same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by the embodiment being described with reference to the drawings, be exemplary, only for explaining the present invention, and can not be interpreted as limitation of the present invention.
At present, an OFDM symbol has 12 RE (Resource Unit) in a PRB, and DMRS may take 3 RE, remains 9 RE; If DMRS takies 6 RE, remain 6 RE.Wherein, each REG is for 4 RE.The minimum of calculating 9,6,4 altogether multiple is 36, if distribute 4 continuous PRB to R-PDCCH like this, the number of total RE that these 4 PRB may provide is:
4 * 9=36=9 REG (when DMRS has taken 3 RE)
4 * 6=24=6 REG (when DMRS has taken 6 RE)
Therefore, in embodiments of the present invention, if can distribute 4 continuous RB to R-PDCCH, just can guarantee that its inner REG can reuse the scheme of R8 completely to the mapping of RE.
Certainly, for above-mentioned two situations, also can separately give an example:
If consider separately 9 and 4, also or 36, distribute 4 continuous PRB;
If consider separately 6 and 4, be 12, distribute 2 continuous PRB.
This shows, in embodiments of the present invention, if an OFDM symbol remains k RE in a PRB, distribute a continuous N PRB, guarantee that N * k is can be by 4 minimum positive integer that divide exactly, the mapping mode that can reuse so existing R8.
Therefore, as can be seen from the above analysis, can adopt N is 2 or 4 Typical Disposition as current system, certainly can also the value of N be done and be expanded, and these also all should be within protection scope of the present invention.
Like this, the situation that the embodiment of the present invention is distributed for discrete PRB resource, can distribute N PRB continuously together, and between a plurality of N PRB, carry out discrete, thereby when can guarantee resource mapping unified, and can obtain better channel estimating performance.
Just with concrete example, aforesaid way is introduced below:
Embodiment mono-,
Distribution condition while as shown in Figure 5, having 3 RE in the next OFDM symbol of multiplexed situation for embodiment of the present invention FDM+TDM.As shown in the figure, show the distribution condition of continuous 4 PRB.
Embodiment bis-,
Distribution condition while as shown in Figure 6, having 6 RE in the next OFDM symbol of multiplexed situation for embodiment of the present invention FDM+TDM.As shown in the figure, show the distribution condition of continuous 2 PRB.
Embodiment tri-,
Distribution condition while as shown in Figure 7, having 3 RE in the next OFDM symbol of multiplexed situation for embodiment of the present invention FDM.As shown in the figure, show the distribution condition of continuous 4 PRB.
Embodiment tetra-,
Distribution condition while as shown in Figure 8, having 6 RE in the next OFDM symbol of multiplexed situation for embodiment of the present invention FDM.As shown in the figure, show the distribution condition of continuous 2 PRB.
Certainly those skilled in the art also can expand according to above embodiment, but within not exceeding the scope of thought of the present invention, within all should being included in protection scope of the present invention.
For R-PDCCH, in the situation that using CRS to carry out demodulation, because CRS is cell public information, therefore can from broadcast message, obtain the port configuration information of CRS.Yet for R-PDCCH, the configuration information of DMRS also needs to notify to whole RN by broadcast or high-level signaling, guarantees the correct detection of RN.
As shown in Figure 9, the relay system back haul link resource allocation method flow chart for the embodiment of the present invention, comprises the following steps:
Step S901, eNB configures N continuous PRB according to the number of DMRS port, and carries out control channel configuration with N continuous PRBWei basic resources unit.In one embodiment of the invention, with N PRBWei Yige basic resources unit, comprise: distribute k continuous basic resources unit; Or, distribute k discrete basic resources unit; Or continuous basic resources unit and discrete basic resources unit also deposit.Wherein the selection of N is described in detail in the above-described embodiments, does not repeat them here.
Step S902, eNB notifies the number of DMRS port and configured number N to RN, and R-PDCCH is sent to RN.Wherein, in one embodiment of the invention, eNB can be with N continuous PRBWei basic resources unit according to the mapping mode mapping REG of R8.In another embodiment of the present invention, eNB sends DMRS to carry out the demodulation of R-PDCCH in R-PDCCH region, wherein, DMRS is not carried out to precoding.In other embodiments, eNB semi-statically or dynamically notifies configured number N to RN.
Step S903, RN carries out the detection of R-PDCCH according to the number of DMRS port and configured number N with the resource mapping method of R8.In one embodiment of the invention, RN is used the DMRS of non-precoding to carry out the demodulation of R-PDCCH.
As shown in figure 10, be the structure chart of the relay system back haul link resource configuration system of the embodiment of the present invention.This system comprises eNB 100 and RN 200.ENB 100 is for configuring N continuous PRB according to the number of DMRS port, and carry out control channel configuration with N continuous PRBWei basic resources unit, and the number of DMRS port and described configured number N are notified to via node RN, and described R-PDCCH is sent to RN, wherein the selection of N is described in detail in the above-described embodiments, does not repeat them here.RN 200 is for carrying out the detection of R-PDCCH according to the number of DMRS port.
In one embodiment of the invention, eNB 100 comprises control channel configuration module 110 and sending module 120.Wherein, control channel configuration module 110 is for according to a number configuration N continuous PRB of DMRS port, and carries out control channel configuration with N continuous PRBWei basic resources unit.Sending module 120 is for the number of DMRS port and described configured number N are notified to RN 200, and described R-PDCCH is sent to RN 200.
Wherein, control channel configuration module 110 shines upon REG with N continuous PRBWei basic resources unit according to the mapping mode of R8.Sending module 120 is semi-statically notified configured number N to RN, or, dynamically notify to RN.
In one embodiment of the invention, RN 200 comprises receiver module 210 and detection module 220.Receiver module 210 is for receiving number and the configured number N of the DMRS port of eNB 100 transmissions, and R-PDCCH.Detection module 220 is for carrying out the detection of R-PDCCH according to the number of DMRS port and configured number N.
Wherein, the resource mapping method that detection module 220 can R8 is carried out the detection of R-PDCCH.
The embodiment of the present invention can guarantee that R-PDCCH internal resource unit is with the port number dynamic change of DMRS, thereby the resource mapping method that guarantees to reuse current R8 is carried out the mapping of REG.And by the embodiment of the present invention, reduced the complexity of standard design, a plurality of continuous PRB also can improve the accuracy of R-PDCCH channel estimating in addition, thereby effectively improve the performance of R-PDCCH Channel Detection.
Those skilled in the art are appreciated that realizing all or part of step that the method for above-described embodiment carries is to come the hardware that instruction is relevant to complete by program, described program can be stored in a kind of computer-readable recording medium, this program, when carrying out, comprises step of embodiment of the method one or a combination set of.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing module, can be also that the independent physics of unit exists, and also can be integrated in a module two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, and also can adopt the form of software function module to realize.If described integrated module usings that the form of software function module realizes and during as production marketing independently or use, also can be stored in a computer read/write memory medium.
The above-mentioned storage medium of mentioning can be read-only memory, disk or CD etc.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (23)
1. a relay system back haul link resource allocation method, is characterized in that, comprises the following steps:
Enode eNB configures N continuous Physical Resource Block PRB according to the number of demodulation pilot frequency DMRS port, and carries out control channel configuration with described N continuous PRBWei basic resources unit;
Described eNB notifies the number of described DMRS port and described configured number N to via node RN, and R-PDCCH is sent to described RN; With
Described RN carries out the detection of R-PDCCH according to the number of described DMRS port and described configured number N.
2. relay system back haul link resource allocation method as claimed in claim 1, is characterized in that, wherein, described configured number N is 9 and 4 common multiple or is 6 and 4 common multiple.
3. relay system back haul link resource allocation method as claimed in claim 2, is characterized in that, described configured number N, comprising:
In a PRB, when the DMRS in each orthogonal frequency division multiplex OFDM symbol takies 3 resource units (RE), N is 9 and 4 common multiple;
In a PRB, when the DMRS in each OFDM symbol takies 6 RE, N is 6 and 4 common multiple.
4. relay system back haul link resource allocation method as claimed in claim 1, is characterized in that, carries out control channel configuration comprise with described N continuous PRBWei basic resources unit:
With described N continuous PRBWei basic resources unit, according to the mapping mode of R8, shine upon resource units group (REG).
5. relay system back haul link resource allocation method as claimed in claim 4, is characterized in that, described RN carries out the detection of R-PDCCH with the resource mapping method of R8.
6. relay system back haul link resource allocation method as claimed in claim 1, is characterized in that,
Described eNB notifies described configured number N to RN, comprising:
Described eNB by the semi-static notice of described configured number N to RN;
Or described eNB dynamically notifies described configured number N to RN.
7. relay system back haul link resource allocation method as claimed in claim 1, is characterized in that, described eNB sends DMRS in described R-PDCCH region, and to carry out the demodulation of R-PDCCH, wherein, described DMRS does not carry out precoding.
8. relay system back haul link resource allocation method as claimed in claim 7, is characterized in that, described RN is used the DMRS of non-precoding to carry out the demodulation of R-PDCCH.
9. relay system back haul link resource allocation method as claimed in claim 1, is characterized in that, describedly with N continuous PRBWei Yige basic resources unit, comprises:
Distribute k continuous basic resources unit;
Or, distribute k discrete basic resources unit;
Or continuous basic resources unit and discrete basic resources unit also deposit.
10. a relay system back haul link resource configuration system, is characterized in that, comprises eNB and RN,
Described eNB, for configure N continuous PRB according to the number of DMRS port, and carry out control channel configuration with described N continuous PRBWei basic resources unit, and the number of described DMRS port and described configured number N are notified to via node RN, and R-PDCCH is sent to described RN; With
Described RN, for carrying out the detection of R-PDCCH according to the number of described DMRS port.
11. relay system back haul link resource configuration systems as claimed in claim 10, is characterized in that, described configured number N is 9 and 4 common multiple or is 6 and 4 common multiple.
12. relay system back haul link resource configuration systems as claimed in claim 11, is characterized in that, described configured number N, comprising:
In a PRB, when the DMRS in each orthogonal frequency division multiplex OFDM symbol takies 3 resource units (RE), N is 9 and 4 common multiple;
In a PRB, when the DMRS in each OFDM symbol takies 6 RE, N is 6 and 4 common multiple.
13. relay system back haul link resource configuration systems as claimed in claim 10, is characterized in that, with N PRBWei Yige basic resources unit, comprise:
Distribute k continuous basic resources unit;
Or, distribute k discrete basic resources unit;
Or continuous basic resources unit and discrete basic resources unit also deposit.
14. 1 kinds of eNB, is characterized in that, comprising:
Control channel configuration module, for configure N continuous PRB according to the number of DMRS port, and carries out control channel configuration with described N continuous PRBWei basic resources unit; With
Sending module, for the number of described DMRS port and described configured number N are notified to RN, and sends to described RN by R-PDCCH.
15. eNB as claimed in claim 14, is characterized in that, described configured number N is 9 and 4 common multiple or is 6 and 4 common multiple.
16. eNB as claimed in claim 15, is characterized in that, described configured number N, comprising:
In a PRB, when the DMRS in each OFDM symbol takies 3 resource units (RE), N is 9 and 4 common multiple;
In a PRB, when the DMRS in each OFDM symbol takies 6 RE, N is 6 and 4 common multiple.
17. eNB as claimed in claim 14, is characterized in that, described control channel configuration module shines upon resource units group (REG) with described N continuous PRBWei basic resources unit according to the mapping mode of R8.
18. eNB as claimed in claim 14, is characterized in that, described sending module is semi-statically notified described configured number N to RN, or, dynamically notify to RN.
19. eNB as claimed in claim 14, is characterized in that, with N PRBWei Yige basic resources unit, comprise:
Distribute k continuous basic resources unit;
Or, distribute k discrete basic resources unit;
Or continuous basic resources unit and discrete basic resources unit also deposit.
20. 1 kinds of RN, is characterized in that, comprising:
Receiver module, for receiving number and the configured number N of the DMRS port of eNB transmission, and R-PDCCH, wherein: described configured number N refers to that eNB is according to the quantity N of the number configuration of the DMRS port PRB corresponding with its quantity;
Detection module, for carrying out the detection of R-PDCCH according to the number of described DMRS port and described configured number N.
21. RN as claimed in claim 20, is characterized in that, described configured number N is 9 and 4 common multiple or is 6 and 4 common multiple.
22. RN as claimed in claim 21, is characterized in that, described configured number N, comprising:
In a PRB, when the DMRS in each OFDM symbol takies 3 resource units (RE), N is 9 and 4 common multiple;
In a PRB, when the DMRS in each OFDM symbol takies 6 RE, N is 6 and 4 common multiple.
23. RN as claimed in claim 20, is characterized in that, described detection module carries out the detection of R-PDCCH with the resource mapping method of R8.
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| EP2781045B1 (en) | 2011-11-16 | 2021-04-07 | Samsung Electronics Co., Ltd. | Method and apparatus for transmitting control information in wireless communication systems |
| CN103581963B (en) * | 2012-08-03 | 2018-05-15 | 中兴通讯股份有限公司 | Control information demodulation pilot frequency port determines method, detection method and terminal |
| CN103686772A (en) * | 2012-09-20 | 2014-03-26 | 中兴通讯股份有限公司 | Enhancement downlink control channel configuration and detection methods and device, base station and terminal |
| CN103874207A (en) * | 2012-12-14 | 2014-06-18 | 华为技术有限公司 | Resource mapping method, base station and user equipment |
| CN103944847B (en) * | 2013-01-18 | 2019-06-18 | 中兴通讯股份有限公司 | Frequency pilot sign carrying and processing method, device |
| CN104105202B (en) * | 2013-04-02 | 2018-10-09 | 上海诺基亚贝尔股份有限公司 | Communication means based on new carrier type and equipment |
| WO2015096081A1 (en) * | 2013-12-26 | 2015-07-02 | 华为技术有限公司 | Method, device and system for processing data |
| 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 |
| CN109728888B (en) * | 2017-10-31 | 2020-12-18 | 电信科学技术研究院 | Method for determining number of demodulation reference signal resource units, terminal and network equipment |
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Address after: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee after: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY Address before: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee before: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY |
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| TR01 | Transfer of patent right |
Effective date of registration: 20210617 Address after: 100085 1st floor, building 1, yard 5, Shangdi East Road, Haidian District, Beijing Patentee after: DATANG MOBILE COMMUNICATIONS EQUIPMENT Co.,Ltd. Address before: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee before: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY |