CN102045843A - Method and system for allocating and transmitting downlink subfames in second-class relay station - Google Patents
Method and system for allocating and transmitting downlink subfames in second-class relay station Download PDFInfo
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- CN102045843A CN102045843A CN200910110613XA CN200910110613A CN102045843A CN 102045843 A CN102045843 A CN 102045843A CN 200910110613X A CN200910110613X A CN 200910110613XA CN 200910110613 A CN200910110613 A CN 200910110613A CN 102045843 A CN102045843 A CN 102045843A
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Abstract
The invention discloses a method and system for allocating and transmitting downlink subfames in a second-class relay station. The method comprises the steps of: configuring guard intervals for downlink subframes of the second-class realy station by an upper-level network node of the second-class relay station, and configuring a time slot in a downlink Access subframe, in which a physical downlink control channel (PDCCH) is arranged, a time slot in a downlink Backhaul subframe, in which the PDCCH is arranged, and the last orthogonal frequency division multiplexing (OFDM) symbol in the downlink Access subframe, to be the guard intervals; and carrying out reception and transmission by the second-class relay station according to the configured downlink subframe structure. The method and the system solve the problem of interference generated between a receiving end and a transmitting end of the second-class relay per se, improve communication quality, realize the radio frequency state conversion of the second-class relay station between downlink reception and downlink transmission, and are compatible with the old version of users, thereby guaranteeing data transmission completeness and improving transmission efficiency.
Description
Technical field:
The invention belongs to moving communicating field; Refer more particularly to a kind of descending sub frame configuration and transmission method and system that is used for second class (Type II) relay station.
Background technology:
Relaying technique has caused attention more and more widely as a kind of emerging technology, is regarded as the key technology of B3G/4G.Because following radio communication or cellular system require to increase coverage, support the higher rate transmission, this has proposed new challenge to wireless communication technology.Simultaneously, the cost issues of system building and maintenance is more outstanding.Along with the increase of transmission rate and communication distance, it is outstanding that the energy consumption issues of battery also becomes, and following radio communication will adopt higher frequency, and the pathloss attenuation that causes thus is more serious.By relaying technique, traditional one hop link can be divided into a plurality of multi-hop links, because distance shortens, this will greatly reduce path loss, help to improve transmission quality, enlarge communication range, thereby provide quicker better service for the user.
In junction network, user and the link between relay station that relay station participates in service are called as access link (Access Link), link between relay station and base station is called as back haul link (Backhaul Link), and user and the link between the base station that the base station participates in service are called as the link that direct transfers (Direct Link).As shown in Figure 1.
In 3GPP Release 9 standards, the second class relay station is divided into two classes at present:
First kind relay station is that a kind of sub-district that is mainly used in covers the via node that enlarges, first kind relay station has independently sub-district ID, send CRS (Cell-specific Reference Signal, cell reference signals) and PDCCH (Physical Downlink Control Channel, Physical Downlink Control Channel), and in transmission course for base station of user Lai Shuoshi of lowest version.
The second class relay station is a kind of via node that cell capacity enlarges that is mainly used in, and the second class relay station is sub-district ID independently not, does not send CRS and PDCCH, and in transmission course at least to transparent node of Release 8 user Lai Shuoshi.
For relaying (In-band relaying) in the band, back haul link, access link and the link that direct transfers all are operated on the identical frequency spectrum.Generally speaking, when the second class relay station when receiving the base station down transmission, if the second class relay station is also carrying out downlink to the user, then can make to produce between the receiving terminal of the second class relay station self and the transmitting terminal and disturb, can cause the severe exacerbation of communication quality like this.
Summary of the invention:
The present invention is in order to solve the above problems; a kind of descending sub frame configuration and transmission method of second relay station are provided; the relaying descending sub frame is divided into two kinds: the subframe that the second class relay station carries out descending reception is called descending Backhaul subframe; the subframe that the second class relay station carries out downlink is called descending Access subframe; when these two kinds of subframes are adjacent, need to be provided with protection GP at interval between subframe.
The present invention considers a kind of descending sub frame collocation method that is used for the second class relay station is provided, and specifically comprise: the upper level network node of the second class relay station is configured the second class relay station descending sub frame; Described configuration is further, comprises, Physical Downlink Control Channel (PDCCH) place time slot configuration in the descending Access subframe is the protection interval; Or with PDCCH place time slot configuration in the descending Backhaul subframe for protection at interval; Or last OFDM (OFDM) symbol in the descending Access subframe is configured to protection at interval;
Wherein, the above-mentioned second class relay station is sub-district ID independently not, does not send cell reference signals (CRS) and physical downlink control channel PDCCH), and in transmission course at least to transparent node of user Lai Shuoshi of 3GPP Release 8;
Further, Physical Downlink Control Channel (PDCCH) place time slot configuration in the descending Access subframe is the protection interval, specifically comprises: with the PDCCH place time slot configuration of all or part of descending Access subframe in the continuous relaying descending sub frame of the second class relay station is to protect at interval;
Further, PDCCH place time slot configuration in the descending Backhaul subframe is the protection interval, specifically comprises: the PDCCH place time slot of all or part of descending Backhaul subframe in the continuous relaying descending sub frame of the second class relay station is configured to protection at interval;
Further, last OFDM symbol in the descending Access subframe is configured to protection at interval, specifically comprises: last OFDM symbol of all or part of descending Access subframe in the continuous relaying descending sub frame of the second class relay station is configured to protection at interval;
Wherein, the time slot at above-mentioned PDCCH place comprises at least 1 and 4 OFDM symbols at the most;
Wherein, described upper level network node comprises, base station and first kind relay station.
The present invention also provides a kind of descending sub frame transmission method that is used for the second class relay station, comprise, the upper level network node of the second class relay station is protected arranged spaced to the second class relay station descending sub frame, and the descending sub frame structure of the second class relay station after according to described configuration receives and launch;
Wherein, above-mentioned configuration comprises, with Physical Downlink Control Channel (PDCCH) place time slot configuration in the second class relay station, the one descending Access subframe is the protection interval, and the described second class relay station is launched at the time slot up-downlink except that protection at interval in this descending Access subframe;
Wherein, above-mentioned configuration also comprises, PDCCH place time slot configuration in the second class relay station, the one descending Backhaul subframe is the protection interval, and the described second class relay station receives PDCCH on the time slot of this descending Backhaul subframe except that protection at interval;
Wherein, above-mentioned configuration also comprises, last OFDM symbol in the second class relay station, the one descending Access subframe is configured to protection at interval, in OFDM symbol up-downgoing emission except that protection at interval, the upper level network node of the described second class relay station is at this protection interval internal symbol up-downgoing emission data and demodulated reference signal (DMRS) in this descending Access subframe for the described second class relay station;
Further, described upper level network node comprises, base station and first kind relay station.
The present invention also provides a kind of transmission system of the second class relay station descending sub frame, specifically comprises the upper level network node and the second class relay station piece;
Wherein, above-mentioned upper level network node is used for the second class relay station descending sub frame is protected arranged spaced;
Wherein, the above-mentioned second class relay station is used for receiving and launching according to the descending sub frame structure after the described configuration.
Described upper level network node comprises, first configuration module is used for the second class relay station descending sub frame is configured, and Physical Downlink Control Channel (PDCCH) place time slot configuration in the descending Access subframe is the protection interval;
Second configuration module is used for descending Backhaul subframe PDCCH place time slot configuration is the protection interval;
The 3rd configuration module is used for last OFDM symbol of descending Access subframe is configured to protection at interval.
Further, the above-mentioned second class relay station also comprises,
First transmitter module is used for the descending Access subframe of the described second class relay station is launched by the time slot up-downlink that the described first configuration module method obtains except that protection at interval;
Second transmitter module, be used for the described second class relay station is obtained OFDM symbol up-downgoing emission except that protection at interval in this descending Access subframe by the 3rd configuration module method, the upper level network node of the described second class relay station is protected internal symbol up-downgoing emission data and demodulated reference signal (DMRS) at interval at this;
Receiver module is used for and will receives PDCCH on the time slot of the descending Backhaul subframe second configuration module method acquisition of the described second class relay station except that protection at interval.
Further, above-mentioned upper level network node comprises base station and first kind relay station.
By enforcement of the present invention, solved between the receiving terminal of the second class relay station self and the transmitting terminal and produced interference problem, improved communication quality; Realize the radio frequency state exchange of the second class relay station between descending reception and downlink, and the user of compatible legacy version, guarantee that transfer of data is complete, improve efficiency of transmission.
Description of drawings:
Fig. 1 junction network structural representation.
Configuration of Fig. 2 second class relay station descending sub frame and structural representation.
The descending Access subframe structure of Fig. 3 second class relay station schematic diagram.
The descending Access subframe structure of Fig. 4 second class relay station schematic diagram.
The descending Backhaul subframe structure of Fig. 5 second class relay station schematic diagram.
The descending Backhaul subframe structure of Fig. 6 second class relay station schematic diagram.
Configuration of Fig. 7 embodiment 1 second class relay station descending sub frame and subframe structure thereof.
Configuration of Fig. 8 embodiment 2 second class relay station descending sub frames and subframe structure thereof.
Configuration of Fig. 9 embodiment 3 second class relay station descending sub frames and subframe structure thereof.
Configuration of Figure 10 embodiment 4 second class relay station descending sub frames and subframe structure thereof.
Configuration of Figure 11 embodiment 5 second class relay station descending sub frames and subframe structure thereof.
Configuration of Figure 12 embodiment 6 second class relay station descending sub frames and subframe structure thereof.
Configuration of Figure 13 embodiment 7 second class relay station descending sub frames and subframe structure thereof.
Configuration of Figure 14 embodiment 8 second class relay station descending sub frames and subframe structure thereof.
Figure 15 embodiment 9 second class relay station descending sub frame transmission systems.
The specific embodiment mode:
Relaying descending sub frame of the present invention is divided into two kinds; the subframe that the second class relay station carries out descending reception is called descending Backhaul subframe; the subframe that the second class relay station carries out downlink is called descending Access subframe; when these two kinds of subframes are adjacent; need to be provided with protection GP at interval between subframe, as Fig. 2.
Because when configuration relaying descending sub frame structure, if set protection at interval on original transmission time slot, allow the second class relay station not carry out any descending reception and emission in this protection at interval, the present invention is by the descending sub frame configuration to the second class relay station.Then can make transfer of data complete, and not influence compatibility the lowest version user.
Central idea of the present invention at first is descending Access subframe, because the second class relay station does not send PDCCH, promptly on preceding 1 to 3 OFDM symbol of Access subframe or preceding 2 to 4 OFDM, do not carry out downlink at the second class relay station, if then as protection at interval as shown in Figure 3, Figure 4 with PDCCH place time slot, it is imperfect just can not to cause the user to receive, and can realize smoothly that the second class relay station is from the descending conversion that receives downlink; In addition; the user need receive data-signal and DMRS (Demodulation Reference Signal) demodulated reference signal on last 1 OFDM symbol of descending Access subframe; if the second class relay station with this symbol as protection at interval as shown in Figure 3; then can be by of the emission of upper level network node at enterprising line data signal of this symbol and DMRS; because the second class relay station is at least to Release 8 user transparents; therefore the user can be when not receiving obliterated data, only a possible loss part merges gain.
Upper level network node of the present invention comprises, base station and first kind relay station.
Secondly to descending Backhaul subframe; the second class relay station need receive data and the control information from the upper level network node; consider that can there be independently control channel the base station at the second class relay station; therefore the second class relay station can not receive PDCCH on descending Backhaul subframe; promptly on preceding 1 to 3 OFDM symbol of descending Backhaul subframe or preceding 2 to 4 OFDM, do not carry out descending reception, then can be with PDCCH place time slot as protection at interval as Fig. 5 and Fig. 6.
In the second class junction network, as shown in Figure 7, two adjacent relaying descending sub frames are followed successively by descending Access subframe and descending Backhaul subframe.According to the method for the invention, preceding 2 OFDM symbols of subframe 1 are configured to protection GP1 at interval, preceding 3 OFDM symbols of subframe 2 are configured to protection GP2 at interval, the second class relay station does not carry out reception and the emission of PDCCH on GP1 and GP2.Can downlink on subframe 1 complete data of second class relay station this moment and do not need the base station or the cooperation of first kind relay station.
Embodiment 2
In the second class junction network, as shown in Figure 8, two adjacent relaying descending sub frames are followed successively by descending Access subframe and descending Backhaul subframe.According to the method for the invention, last 1 OFDM symbol of subframe 1 is configured to protection GP1 at interval, the second class relay station does not carry out reception and the emission of data and DMRS on GP1, and on GP1 base station or first kind relay station cooperation emission data and DMRS.This moment, the second class relay station can normally receive loaded information on the PDCCH on subframe 2.
Embodiment 3
In the second class junction network, as shown in Figure 9, two adjacent relaying descending sub frames are followed successively by descending Backhaul subframe and descending Access subframe.According to the method for the invention, the 1st OFDM symbol of subframe 2 is configured to protection GP1 at interval, the second class relay station does not carry out reception and the emission of PDCCH on GP1.This moment, the second class relay station can normally receive PDCCH on subframe 1, can downlink on subframe 2 complete data and do not need the base station or the cooperation of first kind relay station.
Embodiment 4
In the second class junction network, as shown in figure 10, two adjacent relaying descending sub frames are followed successively by descending Backhaul subframe and descending Access subframe.According to the method for the invention; preceding 3 OFDM symbols of subframe 2 are configured to protection GP1 at interval; last 1 OFDM symbol of subframe 2 is configured to protection GP2 at interval; the second class relay station does not carry out reception and the emission of PDCCH on GP1; on GP2, do not carry out reception and the emission of data and DMRS, and on GP2 base station or first kind relay station cooperation emission data and DMRS.This moment, the second class relay station can normally receive PDCCH on subframe 1.
Embodiment 5
In the second class junction network, as shown in figure 11, three adjacent relaying descending sub frames are followed successively by descending Access subframe, descending Backhaul subframe and descending Access subframe.According to the method for the invention; last 1 OFDM symbol of subframe 1 is configured to protection GP1 at interval; preceding 3 OFDM symbols of subframe 3 are configured to protection GP2 at interval; the second class relay station does not carry out reception and the emission of data and DMRS on GP1; and base station or first kind relay station cooperation emission data and DMRS on GP1, the second class relay station does not carry out reception and the emission of PDCCH on GP2.At this moment, the second class relay station can normally receive PDCCH on subframe 2, can downlink on subframe 3 complete data and do not need the cooperation of base station.
Embodiment 6
In the second class junction network, as shown in figure 12, three adjacent relaying descending sub frames are followed successively by descending Access subframe, descending Backhaul subframe and descending Access subframe.According to the method for the invention; preceding 2 OFDM symbols of subframe 1 are configured to protection GP1 at interval; preceding 3 OFDM symbols of subframe 2 are configured to protection GP2 at interval; preceding 2 OFDM symbols of subframe 3 are configured to protection GP3 at interval; last 1 OFDM symbol of subframe 3 is configured to protection GP4 at interval; the second class relay station does not carry out reception and the emission of PDCCH on GP1, GP2 and GP3; on GP3, do not carry out reception and the emission of data and DMRS, and on GP4 base station or first kind relay station cooperation emission data and DMRS.At this moment, data that the second class relay station is can downlink on subframe 1 complete and do not need the cooperation of base station.
Embodiment 7
In the second class junction network, as shown in figure 13, three adjacent relaying descending sub frames are followed successively by descending Backhaul subframe, descending Access subframe and descending Backhaul subframe.According to the method for the invention; preceding 2 OFDM symbols of subframe 2 are configured to protection GP1 at interval; last 1 OFDM symbol of subframe 2 is configured to protection GP2 at interval; the second class relay station does not carry out reception and the emission of PDCCH on GP1; on GP2, do not carry out reception and the emission of data and DMRS, and on GP2 base station or first kind relay station cooperation emission data and DMRS.At this moment, the second class relay station can normally receive PDCCH on subframe 1 and subframe 3.
Embodiment 8
In the second class junction network, as shown in figure 14, three adjacent relaying descending sub frames are followed successively by descending Backhaul subframe, descending Access subframe and descending Backhaul subframe.According to the method for the invention, preceding 2 OFDM symbols of subframe 2 are configured to protection GP1 at interval, preceding 3 OFDM symbols of subframe 3 are configured to protection GP2 at interval, the second class relay station does not carry out reception and the emission of PDCCH on GP1 and GP2.At this moment, the second class relay station can normally receive PDCCH on subframe 1, can downlink on subframe 2 complete data and do not need the cooperation of base station.
Embodiment 9
In the transmission system of the second class relay station descending sub frame,, specifically comprise the upper level network node and the second class relay station piece as Figure 15; Described upper level network node is used for the second class relay station descending sub frame is protected arranged spaced; The described second class relay station is used for receiving and launching according to the descending sub frame structure after the described configuration;
Wherein, described upper level network node comprises base station and first kind relay station.
Described upper level network node comprises:
First configuration module is used for the second class relay station descending sub frame is configured, and Physical Downlink Control Channel (PDCCH) place time slot configuration in the descending Access subframe is the protection interval;
Second configuration module is used for descending Backhaul subframe PDCCH place time slot configuration is the protection interval;
The 3rd configuration module is used for last OFDM symbol of descending Access subframe is configured to protection at interval.
Further, described descending Access subframe and described descending Backhaul subframe are adjacent.
The described second class relay station also comprises,
First transmitter module is used for descending Access subframe the time slot up-downlink emission except that protection at interval of the descending Access subframe of the described second class relay station by described first configuration module configuration;
Second transmitter module, be used for the described second class relay station is launched by descending Access subframe OFDM symbol up-downgoing except that protection at interval of the 3rd configuration module configuration in this descending Access subframe, protect internal symbol up-downgoing emission data and demodulated reference signal (DMRS) at interval at this in the upper level network node of the described second class relay station;
Receiver module is used for receiving PDCCH on the time slot of descending Backhaul subframe except that protection at interval with descending Backhaul subframe second configuration module configuration of the described second class relay station.
It should be noted last that: above summary of the invention is the unrestricted technological thought of the present invention in order to explanation only, does not break away from any modification or partial replacement of spirit of the present invention and method scope, and it all is encompassed in the middle of the claim scope of the present invention.
Claims (18)
1. the descending sub frame collocation method of a class relay station is characterized in that, the upper level network node of the second class relay station is configured the second class relay station descending sub frame; Described configuration comprises: Physical Downlink Control Channel (PDCCH) place time slot configuration in the descending Access subframe is the protection interval;
Or, PDCCH place time slot configuration in the descending Backhaul subframe is the protection interval;
Or, last OFDM (OFDM) symbol in the descending Access subframe is configured to protection at interval;
Wherein, described descending Access subframe and described descending Backhaul subframe are adjacent.
2. descending sub frame collocation method according to claim 1, it is characterized in that, the described second class relay station is not for there being independently sub-district ID, do not send cell reference signals (CRS) and Physical Downlink Control Channel (PDCCH), and in transmission course at least to transparent node of user Lai Shuoshi of 3GPPRelease 8.
3. descending sub frame collocation method according to claim 2; it is characterized in that; Physical Downlink Control Channel (PDCCH) place time slot configuration in the descending Access subframe is the protection interval, specifically comprises: with the PDCCH place time slot configuration of all or part of descending Access subframe in the continuous relaying descending sub frame of the second class relay station is to protect at interval.
4. descending sub frame collocation method according to claim 2; it is characterized in that; PDCCH place time slot configuration in the descending Backhaul subframe is the protection interval, specifically comprises: the PDCCH place time slot of all or part of descending Backhaul subframe in the continuous relaying descending sub frame of the second class relay station is configured to protection at interval.
5. descending sub frame collocation method according to claim 2; it is characterized in that; last OFDM symbol in the descending Access subframe is configured to protection at interval, specifically comprises: last OFDM symbol of all or part of descending Access subframe in the continuous relaying descending sub frame of the second class relay station is configured to protection at interval.
6. according to claim 3 or 4 described descending sub frame collocation methods, it is characterized in that the time slot at described PDCCH place comprises at least 1 and 4 OFDM symbols at the most.
7. according to claim 1,2,3,4 or 5 descending sub frame collocation methods, it is characterized in that described upper level network node comprises, base station and first kind relay station.
8. the descending sub frame transmission method of a class relay station; it is characterized in that; the upper level network node of the second class relay station is protected arranged spaced to the second class relay station descending sub frame, and the descending sub frame structure of the second class relay station after according to described configuration receives and launch.
9. descending sub frame transmission method according to claim 8; it is characterized in that; described configuration comprises; with Physical Downlink Control Channel (PDCCH) place time slot configuration in the second class relay station, the one descending Access subframe is the protection interval, and the described second class relay station is launched at the time slot up-downlink except that protection at interval in this descending Access subframe.
10. descending sub frame transmission method according to claim 8; it is characterized in that; described configuration also comprises; PDCCH place time slot configuration in the second class relay station, the one descending Backhaul subframe is the protection interval, and the described second class relay station receives PDCCH on the time slot of this descending Backhaul subframe except that protection at interval.
11. descending sub frame transmission method according to claim 8; it is characterized in that; described configuration also comprises; last OFDM symbol in the second class relay station, the one descending Access subframe is configured to protection at interval; in OFDM symbol up-downgoing emission except that protection at interval, the upper level network node is at this protection symbol up-downgoing emission data and demodulated reference signal (DMRS) at interval in this descending Access subframe for the described second class relay station.
12., it is characterized in that described descending Access subframe and described descending Backhaul subframe are adjacent according to claim 9,10 or 11 described descending sub frame transmission methods.
13. descending sub frame transmission method according to Claim 8 is characterized in that, described upper level network node comprises, base station and first kind relay station.
14. the transmission system of a descending sub frame is characterized in that, comprises the upper level network node and the second class relay station;
Described upper level network node is used for the second class relay station descending sub frame is protected arranged spaced;
The described second class relay station is used for receiving and launching according to the descending sub frame structure after the described configuration.
15. the transmission system of descending sub frame according to claim 14 is characterized in that, described upper level network node comprises:
First configuration module is used for the second class relay station descending sub frame is configured, and Physical Downlink Control Channel (PDCCH) place time slot configuration in the descending Access subframe is the protection interval;
Second configuration module is used for descending Backhaul subframe PDCCH place time slot configuration is the protection interval;
The 3rd configuration module is used for last OFDM symbol of descending Access subframe is configured to protection at interval.
16. the transmission system of descending sub frame according to claim 15 is characterized in that, the described second class relay station also comprises,
First transmitter module is used for descending Access subframe the time slot up-downlink emission except that protection at interval of the descending Access subframe of the described second class relay station by described first configuration module configuration;
Second transmitter module, be used for the described second class relay station is launched by descending Access subframe OFDM symbol up-downgoing except that protection at interval of the 3rd configuration module configuration in this descending Access subframe, the upper level network node is at this protection symbol up-downgoing emission data and demodulated reference signal (DMRS) at interval;
Receiver module is used for and will receives PDCCH on the time slot of descending Backhaul subframe except that protection at interval of the descending Backhaul subframe of the described second class relay station by the configuration of second configuration module.
17. the transmission system of descending sub frame according to claim 14 is characterized in that, described upper level network node comprises base station and first kind relay station.
18. the transmission system according to claim 15 or 16 described descending sub frames is characterized in that, described descending Access subframe and described descending Backhaul subframe are adjacent.
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| WO2018058367A1 (en) * | 2016-09-28 | 2018-04-05 | 华为技术有限公司 | Data transmission method, base station and user equipment |
| WO2019051707A1 (en) * | 2017-09-14 | 2019-03-21 | Oppo广东移动通信有限公司 | Method for transmitting information, terminal device, and network device |
| WO2021032065A1 (en) * | 2019-08-16 | 2021-02-25 | 华为技术有限公司 | Resource multiplexing method and apparatus |
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Application publication date: 20110504 |