CN101778390B - Method and system for resource collaboration - Google Patents
Method and system for resource collaboration Download PDFInfo
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- CN101778390B CN101778390B CN200910076597.7A CN200910076597A CN101778390B CN 101778390 B CN101778390 B CN 101778390B CN 200910076597 A CN200910076597 A CN 200910076597A CN 101778390 B CN101778390 B CN 101778390B
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- 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
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
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- 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
- H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
- H04W16/10—Dynamic resource partitioning
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Abstract
The invention discloses a method and a system for resource collaboration. In the technical scheme of the invention, all collaborative nodes have time windows with the same time length and the same time resources in the time windows are selected for resource collaboration, so the collaborative resources and the non-collaborative resources are of time division type. By adopting the simple and feasible scheme, the resources are reasonably divided, the problem of inaccurate CQI caused by frequency resource collaboration is effectively solved and the scheduling is not affected by the inaccurate CQI. The accurate CQI can enable coding, modulation, resource mapping and the like to be more adaptive to link situations, so the performance of a point-to-point link is improved and the throughput of the entire system is improved.
Description
Technical field
The present invention relates to the communications field, refer to especially a kind of method and system of resource collaboration.
Background technology
The goal in research of B3G/4G is to collect the connecting systems such as honeycomb, fixed wireless access, nomadic, radio area network, in conjunction with complete IP network, under high speed and low speed mobile environment, being respectively user provides peak rate to reach the wireless transmission capability of 100Mbps and 1Gbps, and realize the seamless connection of cellular communication system, regional wireless network, broadcast, telstar communication, final realization " anyone carries out communicating by letter of any mode with all other men at any time and any place ".Relaying (Relay) technology both can increase community covering also can increase cell capacity, and making relaying technique can be used as effective measures should use.Introduce after relaying technique, can cause many problems, if the utilization of resources is the problem that needs further investigation.
Running time-frequency resource is managed for OFDM (OFDM, Orthogonal Frequency DivisionMultiplexing) communication system is extremely important, particularly for the communication system of introducing relay station (RS, Relay Station).In double bounce communication system, be generally user terminal (UT, User Terminal) transmission data, first by base station (BS, Base Station) in relay area, (Relay Zone) is transmitted to RS, then in access area, (Access Zone) is transmitted to UT by this RS.Like this, shared running time-frequency resource is original twice, and this has caused the decline of resource utilization.
Cooperation technology is a kind of macroscopic view in multi-hop communication system or distributed multiple-input and multiple-output (MIMO, Multiple-Input Multiple-Out-put) communication system, can be applied in the uplink downlink of access (Access) or relaying.Cooperation technology is similar to the grand diversity between neighbor bss, at base station (MR-BS, Multihop Relay Base Station) utilize in community cooperation transmitting between BS and each RS to realize, by utilizing the transmitting antenna of different B S and RS to send relevant signal, realize collaboration diversity.Pass through cooperation technology, space diversity effect can provide the better error rate (BER for link, Bit Error Rate)/Block Error Rate (BLER, Block Error Rate) performance, spatial reuse can be communication system and brings higher spectrum efficiency simultaneously.
Cooperation can be multiple emission sources, i.e. multiple spot.Can be regarded as multiple spot resource collaboration in BS for the resource collaboration in the BS of introducing RS; Can be regarded as multiple spot resource collaboration between BS for the resource collaboration between multiple BS.Between BS, in multipoint cooperative, can comprise multiple spot resource collaboration in BS, BS has wherein introduced RS, the namely combination of multiple spot resource collaboration between multiple spot resource collaboration and BS in BS.
At present, be a focus for the research of BS and RS, but less for the research of the resource collaboration between BS and RS, between multiple RS, between multiple BS.Current communication system is all the scheme of carrying out resource collaboration based on frequency, but there is channel quality information (CQI for frequency resource, Channel QualityIndicator) problem of feedback accuracy and scheduling, that is to say, can not truly reflect channel condition for the CQI in the frequency resource of cooperation, but not cooperation frequency resource in CQI can reflect channel condition, this cause communication system carry out next time dispatch in can not carry out exactly resource distribution according to CQI.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method and system of resource collaboration, effectively solves the frequency resource inaccurate problem of CQI causing that cooperates.
For achieving the above object, technical scheme of the present invention is achieved in that
A method for resource collaboration, the method comprises: form-separating when cooperation resource adopts with the non-resource that cooperates, each cooperative node has the time window of same time length, and the same time resource in select time window is carried out resource collaboration.
The described time resource that carries out resource collaboration is cooperation time resource, and the described cooperation time resource in select time window comprises: according to setting rules selection cooperation time resource; Or, select cooperation time resource according to the negotiation result between cooperative node; Or cooperation time resource is selected in configuration according to high level.
The described time resource that carries out resource collaboration is cooperation time resource, all the other time resources in time window are non-cooperation time resource, and the method further comprises steps A: to cooperating in time window, time resource carries out self adaptation adjustment with the ratio of the non-time resource that cooperates.
Described steps A comprises: judge whether cooperation time resource and the ratio of the non-resource that cooperates need to adjust, if need to adjust, adopt the cooperate configuration of time resource of ratio after adjustment in time window; If do not need to adjust, adopt the configuration of the former proportional time resource that cooperates in time window.
Describedly judge that whether cooperation time resource and the ratio of the non-resource that cooperates need to adjust, and comprising: determine whether to adjust with the ratio of the non-resource that cooperates the time resource that cooperates according to the negotiation result between cooperative node; Or, need to adjust with the ratio of the non-resource that cooperates cooperation time resource according to determining whether from high-rise signaling; Or, determine whether to adjust with the ratio of the non-resource that cooperates cooperation time resource according to setting rule.
Described time resource is taking orthogonal frequency division multiplex OFDM symbol or time slot or subframe or radio frames or superframe as chronomere; Cooperate in the described time window ratio of time resource and the non-time resource that cooperates, is: in described time window for the ratio of chronomere's quantity with the chronomere's quantity cooperating for non-resource of resource collaboration.
Described resource collaboration is: multiple spot resource collaboration in BS, or multiple spot resource collaboration between BS, or the combination of multiple spot resource collaboration between multiple spot resource collaboration and BS in BS; In described BS, multiple spot resource collaboration is: the resource collaboration between the multiple RS in BS and this BS coverage, or, the resource collaboration between the multiple RS in a BS coverage; Between described BS, multiple spot resource collaboration is: the time resource cooperation between multiple BS.
The method further comprises: the size of time window described in dynamic or semi-static or static configuration.
A kind of system of resource collaboration, this system comprises: at least two cooperative nodes, form-separating when cooperation resource adopts with the non-resource that cooperates, each cooperative node has the time window of same time length, carries out resource collaboration for the same time resource of select time window; Described cooperative node is further used for: select cooperation time resource through consultation or according to the high-rise configuration notification of receiving; And/or, through consultation or according to the ratio of time resource with the non-time resource that cooperates that cooperate in time window of high-rise configuration notification adjustment of receiving.
Described cooperative node at least comprises: processing module, for selecting the time resource identical with other cooperative nodes to carry out resource collaboration at time window; Described cooperative node further comprises: judge module and adjusting module, and wherein, when described judge module need to be adjusted with the ratio of the non-resource that cooperates for definite cooperation time resource, notice adjusting module is adjusted; Described adjusting module carries out self adaptation adjustment for time resource that time window is cooperated with the ratio of the non-time resource that cooperates; Described processing module, for selecting the time resource identical with other cooperative nodes to carry out resource collaboration according to the ratio after adjusting at time window.
In the present invention program, each cooperative node has the time window of same time length, same time resource in select time window is carried out resource collaboration, therefore, form-separating when cooperation resource with the non-resource that cooperates is, by simple scheme provided by the invention, classifying rationally resource, efficiently solve the frequency resource inaccurate problem of CQI causing that cooperates, make scheduling no longer be subject to the impact of inaccurate CQI.CQI accurately makes coding, modulation, resource mapping etc. more be applicable to link condition, has both improved the link performance of single-point to single-point, has also improved the throughput of whole system.
Brief description of the drawings
Fig. 1 is resource collaboration schematic diagram in the embodiment of the present invention one;
Fig. 2 is resource collaboration schematic diagram in the embodiment of the present invention two;
Fig. 3 is resource collaboration schematic diagram in the embodiment of the present invention three;
Fig. 4 is resource collaboration schematic diagram in the embodiment of the present invention four;
Fig. 5 is the resource distribution flow chart that cooperates in the present invention;
Fig. 6 is resource collaboration system configuration schematic diagram in the present invention.
Embodiment
In the present invention, each cooperative node has the time window of same time length, and the same time resource in select time window is carried out resource collaboration.Described cooperative node can be BS, can be also RS.Resource collaboration can be multiple spot resource collaboration in BS, can be also multiple spot resource collaboration between BS; It can also be the combination of multiple spot resource collaboration between the interior multiple spot resource collaboration of BS and BS.In described BS, multiple spot resource collaboration is: the resource collaboration between the multiple RS in BS and this BS coverage, or, the resource collaboration between the multiple RS in a BS coverage.Between described BS, multiple spot resource collaboration is: the time resource cooperation between multiple BS.Described time resource can be taking OFDM symbol or time slot or subframe or radio frames or superframe etc. as chronomere.
When each cooperative node carries out resource collaboration select time resource, can select according to setting rule; Also can select according to the negotiation result between cooperative node; Can also select according to high level configuration.
To in a time window, be called cooperation time resource for the time resource of resource collaboration; In a time window, be called non-cooperation time resource for the time resource of non-resource cooperation.In different time window, cooperation time resource can self adaptation adjustment with the ratio of the non-time resource that cooperates.The each cooperative node that carries out resource collaboration can carry out self adaptation adjustment according to high level configuration; Also can carry out self adaptation adjustment according to the negotiation result between cooperative node; Can also carry out self application adjustment according to setting rule.Time resource is taking OFDM symbol or time slot or subframe or radio frames or superframe etc. during as chronomere, and self adaptation adjustment refers to chronomere cooperation time resource is configured.Time resource and the ratio of the non-time resource that cooperates of cooperating in a time window refers in this time window the ratio for chronomere's quantity with the chronomere's quantity cooperating for non-resource of resource collaboration.
In addition, the size of time window can be also dynamic or semi-static or static configuration, and concrete configuration is realized by high level.
Below by several specific embodiments, the present invention program's specific implementation is further described in detail the chronomere using a subframe as time resource in each embodiment.
Fig. 1 is resource collaboration schematic diagram in the embodiment of the present invention one, as shown in Figure 1, between the multiple RS in this embodiment in BS and this BS coverage, carries out resource collaboration, has 2 RS, i.e. RS1, RS2 in BS coverage.Can directly be used for resource collaboration according to the 1st subframe of setting in rules selection time window; Also can determine that the 1st subframe in select time window is for resource collaboration by BS, then the time resource for resource collaboration by signaling RS1, RS2; Also can be by the 1st subframe of holding consultation between BS, RS1, RS2 in definite select time window for resource collaboration; Can also determine that the 1st subframe in select time window is for resource collaboration by high level, then notify BS, RS1, the RS2 time resource for resource collaboration.Like this, BS, RS1, RS2 all distribute the 1st subframe in time window for resource collaboration, and other subframes are not carried out resource collaboration.
Fig. 2 is resource collaboration schematic diagram in the embodiment of the present invention two, as shown in Figure 2, between the multiple RS in this embodiment in BS coverage, carries out resource collaboration, has 3 RS, i.e. RS1, RS2, RS3 in BS coverage.Can directly be used for resource collaboration according to the 2nd subframe of setting in rules selection time window; Also can determine that the 2nd subframe in select time window is for resource collaboration by BS, then the time resource for resource collaboration by signaling RS1, RS2, RS3; Also can be by the 2nd subframe of holding consultation between RS1, RS2, RS3 in definite select time window for resource collaboration; Can also determine that the 2nd subframe in select time window is for resource collaboration by high level, then notify RS1, RS2, the RS3 time resource for resource collaboration.Like this, RS1, RS2, RS3 all distribute the 2nd subframe in time window for resource collaboration, and other subframes are not carried out resource collaboration.
Fig. 3 is resource collaboration schematic diagram in the embodiment of the present invention three, as shown in Figure 3, carries out resource collaboration, 3 BS, i.e. BS1, BS2, BS3 in this embodiment between multiple BS.Can directly be used for resource collaboration according to the 3rd subframe of setting in rules selection time window; Also can be by the 3rd subframe of holding consultation between BS1, BS2, BS3 in definite select time window for resource collaboration; Also can determine that the 3rd subframe in select time window is for resource collaboration by high level, then notify BS1, BS2, the BS3 time resource for resource collaboration.Like this, BS1, BS2, BS3 all distribute the 3rd subframe in time window for resource collaboration, and other subframes are not carried out resource collaboration.
Fig. 4 is resource collaboration schematic diagram in the embodiment of the present invention four, as shown in Figure 4, between RS between RS in this embodiment between each BS and in corresponding BS coverage, in BS and this BS coverage, jointly carry out resource collaboration, in BS1 coverage, have 2 RS, i.e. RS11, RS12; In BS2 coverage, there are 1 RS, i.e. RS21.Can directly be used for resource collaboration according to the 1st subframe of setting in rules selection time window; Also can, by the 1st subframe of holding consultation between BS1, BS2 in definite select time window for resource collaboration, then be used for respectively the time resource of resource collaboration by the RS in signaling coverage; Also can be by the 1st subframe of holding consultation between each BS1, RS11, RS12, BS2, RS21 in definite select time window for resource collaboration; Can also determine that the 1st subframe in select time window is for resource collaboration by high level, then notify respectively BS1, RS11, RS12, BS2, the RS21 time resource for resource collaboration.Like this, BS1, RS11, RS12, BS2, RS21 all distribute the 1st subframe in time window for resource collaboration, and other subframes are not carried out resource collaboration.
Fig. 5 is the resource distribution flow chart that cooperates in the present invention, and as shown in Figure 5, the concrete processing procedure that realizes cooperation resource distribution comprises the following steps:
Step 501: judge that whether cooperation time resource and the ratio of the non-resource that cooperates need to adjust, if need to adjust, perform step 502; If do not need to adjust, perform step 503.
Between cooperative node, can determine whether to adjust with the ratio of the non-resource that cooperates cooperation time resource according to negotiation result; Also can need to adjust with the ratio of the non-resource that cooperates cooperation time resource according to determining whether from high-rise signaling; Can also determine whether to adjust with the ratio of the non-resource that cooperates cooperation time resource according to setting rule.
Step 502: adopt the cooperate configuration of time resource of ratio after adjusting in time window.
The ratio of cooperation time resource and the non-resource that cooperates can be determined by the negotiation between each cooperative node, also can be according to determining from high-rise signaling.Cooperation time resource is configured in the position in time window, can select according to setting rule; Also can select according to the negotiation result between cooperative node; Can also select according to high level configuration.
Step 503: adopt the configuration of the former proportional time resource that cooperates in time window.Cooperation time resource is configured in the position in time window, can select according to setting rule; Also can select according to the negotiation result between cooperative node; Can also select according to high level configuration.
In 4 kinds of scenes of Fig. 1 to Fig. 4, the size of setup times window is 3 subframes, and cooperation time resource is 1: 2 with the ratio of the non-time resource that cooperates.In practical application, also other sizes that can definition time window, for example, the size of time window can be 10 subframes, 32 subframes etc., cooperation time resource can be configured according to concrete scheduling with the ratio of the non-time resource that cooperates, as 2: 8,10: 22 etc.
For example, if there are 2 RS in certain BS coverage, i.e. RS1, RS2, time window size is 10 subframes, the unit of subframe is 1ms, and the time resource that cooperates in the 1st time window is 2: 8 with the ratio of the non-time resource that cooperates; The time resource that cooperates in the 2nd time window is 3: 7 with the ratio of the non-time resource that cooperates.Like this, when BS, RS1, RS2 carry out resource collaboration, in the 1st time window, BS, RS1, RS2 adopt the ratio of 2: 8 to be configured cooperation time resource, as select the 2nd subframe in this time window and the 7th subframe as cooperation time resource, other subframes in this time window are not carried out resource collaboration; In the 2nd time window, BS, RS1, RS2 adopt the ratio of 3: 7 to be configured cooperation time resource, select the 2nd subframe in this time window, the 6th subframe and the 9th subframe as cooperation time resource, other subframes in this time window are not carried out resource collaboration.While selecting the subframe of conduct cooperation time resource, can select according to setting rule; Also can select according to the negotiation result between cooperative node; Can also select according to high level configuration.
Fig. 6 is resource collaboration system configuration schematic diagram in the present invention, as shown in Figure 6, this system comprises: at least two cooperative nodes, as the first cooperative node and the second cooperative node, each cooperative node has the time window of same time length, carries out resource collaboration for the same time resource of select time window.
Each cooperative node is further used for: select cooperation time resource through consultation or according to the high-rise configuration notification of receiving; And/or, through consultation or according to the ratio of time resource with the non-time resource that cooperates that cooperate in time window of high-rise configuration notification adjustment of receiving.
Cooperative node at least comprises: processing module, and for selecting the time resource identical with other cooperative nodes to carry out resource collaboration at time window.Cooperative node further comprises: judge module and adjusting module, and wherein, when judge module need to be adjusted with the ratio of the non-resource that cooperates for definite cooperation time resource, notice adjusting module is adjusted; Adjusting module carries out self adaptation adjustment for time resource that time window is cooperated with the ratio of the non-time resource that cooperates; Processing module, for selecting the time resource identical with other cooperative nodes to carry out resource collaboration according to the ratio after adjusting at time window.
The above, be only preferred embodiment of the present invention, is not intended to limit protection scope of the present invention.
Claims (9)
1. a method for resource collaboration, is characterized in that, the method comprises:
Form-separating time division resource when each cooperative node adopts, has the time window of same time length, and the identical time resource of sequential in select time window carries out resource collaboration; Wherein,
Described resource collaboration is: multiple spot resource collaboration in base station BS, or multiple spot resource collaboration between BS, or the combination of multiple spot resource collaboration between multiple spot resource collaboration and BS in BS;
In described BS, multiple spot resource collaboration is: the resource collaboration between the multiple relay station RS in BS and this BS coverage, or, the resource collaboration between the multiple RS in a BS coverage;
Between described BS, multiple spot resource collaboration is: the time resource cooperation between multiple BS.
2. method according to claim 1, is characterized in that, using in time window for the time resource of resource collaboration as cooperation time resource, all the other time resources in described time window are non-cooperation time resource; Described cooperation time resource in select time window comprises:
According to setting rules selection cooperation time resource; Or,
Select cooperation time resource according to the negotiation result between cooperative node; Or,
According to high level, cooperation time resource is selected in configuration.
3. method according to claim 1 and 2, is characterized in that, the method further comprises:
A, to cooperating in time window, time resource carries out self adaptation adjustment with the ratio of the non-time resource that cooperates.
4. method according to claim 3, it is characterized in that, described steps A comprises: judge whether cooperation time resource and the ratio of the non-time resource that cooperates need to adjust, if need to adjust, adopt the cooperate configuration of time resource of ratio after adjustment in time window; If do not need to adjust, adopt the configuration of the former proportional time resource that cooperates in time window.
5. method according to claim 4, is characterized in that, describedly judges that whether cooperation time resource and the ratio of the non-time resource that cooperates need adjustment, comprising:
Determine whether to adjust with the ratio of the non-time resource that cooperates cooperation time resource according to the negotiation result between cooperative node; Or,
Need to adjust with the ratio of the non-time resource that cooperates cooperation time resource according to determining whether from high-rise signaling; Or,
Determine whether to adjust with the ratio of the non-time resource that cooperates cooperation time resource according to setting rule.
6. method according to claim 3, is characterized in that,
Described cooperation time resource and non-cooperation time resource are taking orthogonal frequency division multiplex OFDM symbol or time slot or subframe or radio frames or superframe as chronomere;
Cooperate in the described time window ratio of time resource and the non-time resource that cooperates, is: in described time window for the ratio of chronomere's quantity with the chronomere's quantity cooperating for non-resource of resource collaboration.
7. method according to claim 1 and 2, is characterized in that, the method further comprises: the size of time window described in dynamic or semi-static or static configuration.
8. a system for resource collaboration, is characterized in that, this system comprises: at least two cooperative nodes, and form-separating when cooperation resource adopts with the non-resource that cooperates,
Form-separating time division resource when each cooperative node adopts, has the time window of same time length, and described each cooperative node carries out resource collaboration for the identical time resource of sequential of select time window;
Described cooperative node is specifically further used for:
Select cooperation time resource through consultation or according to the high-rise configuration notification of receiving; And/or,
Through consultation or according to the ratio of time resource with the non-time resource that cooperates that cooperate in time window of high-rise configuration notification adjustment of receiving;
Described cooperation time resource is the time resource for resource collaboration in time window, and all the other time resources in described time window are non-cooperation time resource; Wherein,
Described resource collaboration is: multiple spot resource collaboration in base station BS, or multiple spot resource collaboration between BS, or the combination of multiple spot resource collaboration between multiple spot resource collaboration and BS in BS;
In described BS, multiple spot resource collaboration is: the resource collaboration between the multiple relay station RS in BS and this BS coverage, or, the resource collaboration between the multiple RS in a BS coverage;
Between described BS, multiple spot resource collaboration is: the time resource cooperation between multiple BS.
9. system according to claim 8, is characterized in that,
Described cooperative node at least comprises: processing module, for selecting the time resource identical with other cooperative node sequential to carry out resource collaboration at time window;
Described cooperative node further comprises: judge module and adjusting module, wherein,
When described judge module need to be adjusted with the ratio of the non-time resource that cooperates for definite cooperation time resource, notice adjusting module is adjusted;
Described adjusting module carries out self adaptation adjustment for time resource that time window is cooperated with the ratio of the non-time resource that cooperates;
Described processing module, for selecting the time resource identical with other cooperative node sequential to carry out resource collaboration according to the ratio after adjusting at time window.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910076597.7A CN101778390B (en) | 2009-01-09 | 2009-01-09 | Method and system for resource collaboration |
| PCT/CN2009/076121 WO2010078811A1 (en) | 2009-01-09 | 2009-12-28 | Resource cooperation method and system |
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| CN200910076597.7A CN101778390B (en) | 2009-01-09 | 2009-01-09 | Method and system for resource collaboration |
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| KR20130075773A (en) * | 2010-10-07 | 2013-07-05 | 닛본 덴끼 가부시끼가이샤 | Scheduling method and system for coordinated multipoint transmission/reception |
| US9414399B2 (en) | 2013-02-07 | 2016-08-09 | Commscope Technologies Llc | Radio access networks |
| US9936470B2 (en) | 2013-02-07 | 2018-04-03 | Commscope Technologies Llc | Radio access networks |
| US9380466B2 (en) | 2013-02-07 | 2016-06-28 | Commscope Technologies Llc | Radio access networks |
| CA2951548A1 (en) | 2014-06-09 | 2015-12-17 | Airvana Lp | Radio access networks |
| CN107124764B (en) * | 2016-02-24 | 2019-11-19 | 大唐移动通信设备有限公司 | A kind of cooperation resource determining method and device |
| WO2019070627A1 (en) | 2017-10-03 | 2019-04-11 | Commscope Technologies Llc | Dynamic downlink reuse in a c-ran |
| US11304213B2 (en) | 2018-05-16 | 2022-04-12 | Commscope Technologies Llc | Dynamic uplink reuse in a C-RAN |
| CN112075105A (en) | 2018-06-08 | 2020-12-11 | 康普技术有限责任公司 | Automatic transmit power control for a radio point of a centralized radio access network providing wireless services primarily for users located in event areas of a venue |
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| US7508798B2 (en) * | 2002-12-16 | 2009-03-24 | Nortel Networks Limited | Virtual mimo communication system |
| CN100352276C (en) * | 2004-12-30 | 2007-11-28 | 中兴通讯股份有限公司 | Method for scheduling resources of frequency spectrum shared by digital TV broadcast system and wireless communication system |
| US7673219B2 (en) * | 2006-03-16 | 2010-03-02 | Mitsubishi Electric Research Laboratories, Inc. | Cooperative relay networks using rateless codes |
| KR101276339B1 (en) * | 2006-09-29 | 2013-06-18 | 한국전자통신연구원 | Apparatus and method for relaying between base station and terminal, and base station |
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