CN101998492A

CN101998492A - Synergic uplink and downlink transmission method and synergic system between base stations

Info

Publication number: CN101998492A
Application number: CN 200910092116
Authority: CN
Inventors: 陈沫; 闫志刚
Original assignee: China Mobile Communications Group Co Ltd
Current assignee: China Mobile Communications Group Co Ltd
Priority date: 2009-08-31
Filing date: 2009-08-31
Publication date: 2011-03-30
Anticipated expiration: 2029-08-31
Also published as: CN101998492B

Abstract

The invention discloses an uplink transmission method between base stations, comprising the following steps: a current main base station receives a measurement report returned from UE (user equipment) to determine the current synergic RRU (remote radio unit) assembly; when a current synergic RRU assembly has RRU belonging to a synergic base station, the synergic base station requests for received uplink data from the UE from RRU belonging to the synergic base station; and each RRU in the current synergic RRU assembly sends received uplink data from the UE to the current main base station. The invention also discloses a downlink transmission method between base stations, a synergic system between base stations and the base station, which can simultaneously utilize RRU belonging to the synergic base station in the synergic RRU and RRU belonging to the synergic base station to carry out data interaction with the UE when the current synergic RRU assembly has RRU belonging to the synergic base station, thus realizing across-base station synergic transmission for the UE, improving the communication transmission performance and throughput of the UE, and improving service quality for the UE.

Description

The uplink and downlink transmission method of cooperation between base stations and the system of cooperation between base stations

Technical field

The present invention relates to mobile communication technology, be specifically related to the uplink and downlink transmission method of cooperation between base stations, and the system of cooperation between base stations.

Background technology

At advanced long evolving system (Long Term Evolution-Advanced, LTE-A) in, adopt OFDM to insert (Orthogonal Frequency Divided Multiple access at present, OFDMA) technology, the OFDMA technology utilizes orthogonality between the frequency as distinguishing subscriber equipment (UserEquipment, UE) mode, by with the information-bearing of different UEs on mutually orthogonal different carrier, can effectively reduce the adverse effect that frequency selective fading is brought.The topological structure of the cellular network that uses in the current LTE-A system has been shown among Fig. 1, as shown in the figure, each base station covers a sector (being the sub-district), because the employed frequency of different UEs is mutually orthogonal in the sub-district, therefore, for the UE in certain sub-district, its all interference all comes from other sub-districts, thereby this mode can improve the Signal Interference and Noise Ratio (SINR) that is positioned at center of housing estate zone UE greatly, and obtains higher data rate and better service quality.And for the UE that is positioned at cell edge region, because it is nearer apart from neighbor cell, thereby take with other UE of the same carrier resource of this UE bigger in the neighbor cell to its interference, this UE itself is far away apart from this cell base station in addition, its SINR is less relatively, though cause the throughput of whole sub-district higher, it is relatively poor and throughput is lower to be positioned at its service quality of UE of cell edge region.

Distributed radio system has obtained the extensive concern and the research of industry as one of solution of the problems referred to above after the proposition.Distributing antenna system is a kind of new network framework, in LTE-A, be called multipoint cooperative (Coordinated Multiple Point again, CoMP) transmission, under this framework, adopt the multi-antenna cooperative mode in the single base station---promptly, radio frequency unit separates setting with other parts of base station, the antenna station of distributing antenna system only comprises radio frequency unit (Remote Radio Unit, RRU), a plurality of RRU give centralized baseband processing unit (the Base-band Unit that is positioned at the base station with digital medium-frequency signal by Optical Fiber Transmission, BBU), at this moment, a BBU connects a plurality of RRU, coordination by same BBU, the direct-connected a plurality of RRU of use and this BBU physics unite transmission/reception and realize performance gain, the network architecture of described distributing antenna system as shown in Figure 2, comprise 3 base stations (i.e. 3 BBU) in this network---be respectively BBU1, BBU2 and BBU3, wherein BBU1 comprises 3 antenna stations (i.e. 3 RRU), be called RRU1, RR2 and RRU3, BBU2 comprises RRU4 and RRU5, BBU3 then comprises RRU6 and RRU7, the mutual alignment that is located at each RRU in the actual environment concerns as shown in Figure 3: when the A place, position shown in UE is positioned at, the cooperation RRU set of this moment can be selected RRU1, RRU2 and RRU3, at this moment this UE can obtain higher transmission performance gain.Cooperation way has a significant effect to the raising of the UE transmission performance that is positioned at the center of housing estate position in this station, and it does not relate to the data surface of striding between the station and the data of chain of command are shared, realize fairly simple, but its shortcoming is also very obvious:

For example, when this UE moves to as shown in Figure 3 B place, position, draw easily, select this moment RRU2, RRU3, RRU4 and RRU5 that this UE is carried out the CoMP transmission, should have preferable transmission performance gain according to the principle of CoMP.Yet, because the existing distributed radio system belongs to static cooperative system, only belong to the interior cooperation of to stand between each RRU of same BBU, thereby this moment is to being positioned at this UE at B place, position, if cooperate by the RRU under the BBU1, then can select RRU2 and RRU3, and if cooperate by the RRU under the BBU2, then can select RRU4 and RRU5, but all can't realize coming this UE is carried out the CoMP transmission by RRU2, RRU3, RRU4 and RRU5.

As seen, for the UE that is positioned between the base station, the cooperation RRU set of its best has comprised the RRU of adjacent a plurality of websites, because cooperation can only be positioned at the station, make these UE performances that are positioned at cell edge far be worse than the UE that is positioned at center of housing estate, provide simple instance analysis below: two classes configuration scene as shown in Figure 4, the allocation plan in left side is that a base station has comprised 3 fan antennas, the allocation plan on right side then is that a base station has comprised 21 fan antennas, supposes that here UE evenly distributes and each fan antenna coverage unanimity in described sector coverage area.Left hatched example areas among Fig. 4 is represented the base station fringe region, right hatched example areas is then represented the central area of base station, can draw by analytical calculation: for the configuration of 3 sectors shown in the allocation plan of Fig. 4 left side, there is 50% zone to need cooperation between base stations, and for the configuration of 21 sectors shown in the allocation plan of Fig. 4 right side, about 57% zone needs cooperation between base stations.From above-mentioned instance analysis as can be seen, only use cooperation in the station of single base station far can not satisfy the performance requirement of UE, the UE performance that is positioned at the base station marginal position will be significantly less than the UE that is positioned at the base station center zone.Therefore, cooperation mode can't realize striding the cooperation transmission of base station in the existing station, can't select the cooperation RRU set of its actual needs according to the particular location of UE, thereby has limited the communications performance of UE, is unfavorable for improving its service quality and throughput.

Summary of the invention

The invention provides a kind of system and base station of uplink and downlink transmission method and cooperation between base stations of cooperation between base stations, can realize striding the cooperation transmission of base station UE.

For achieving the above object, technical scheme of the present invention specifically is achieved in that

A kind of ascending transmission method of cooperation between base stations, this method comprises:

Current dominant base sends the request of measuring of eating dishes without rice or wine to the user equipment (UE) that is positioned at its sub-district;

Current dominant base receives the measurement report that UE returns, and determines current cooperation radio frequency unit RRU set;

If have the RRU that belongs to cooperative base station in the current cooperation RRU set, then current dominant base is to its upstream data from UE that receives of described cooperative base station request;

The upstream data from UE that each RRU in the described current cooperation RRU set will receive sends to current dominant base, realizes the uplink coordinated transmission between the base station.

The described method of determining that current cooperation RRU gathers comprises:

Current dominant base is with in the measurement report, and the RRU that the value of designated cell parameter is higher than each sub-district correspondence of preset value is defined as current cooperation RRU set.

If have the RRU that belongs to cooperative base station in the current cooperation RRU set, before the described current dominant base step that it receives to described cooperative base station request from the upstream data of UE, this method further comprises:

Current dominant base sends the cooperation request to each cooperative base station respectively, and the RRU that belongs to this cooperative base station during request will described current cooperation RRU be gathered is used for the uplink coordinated transmission to UE;

After cooperative base station is received cooperation request, judge whether to allow described cooperation request,, otherwise refuse described cooperation request if allow then return the cooperation acknowledge message according to the current state that belongs to the RRU of this cooperative base station in the described current cooperation RRU set;

The message that current dominant base returns according to cooperative base station is determined final current cooperation RRU set;

Judge in the current cooperation RRU set whether have the RRU that belongs to cooperative base station, if, the step that then continues to carry out described current dominant base it receives to described cooperative base station request from the upstream data of UE.

When not having the RRU that belongs to cooperative base station in judging current cooperation RRU set, this method further comprises:

The upstream data from UE that each RRU in the described current cooperation RRU set will receive sends to current dominant base, realizes uplink coordinated transmission in the station.

A kind of downlink transmission method of cooperation between base stations, this method comprises:

Current dominant base sends the request of measuring of eating dishes without rice or wine to the UE that is positioned at its sub-district;

Current dominant base receives the measurement report that UE returns, and determines current cooperation RRU set;

If have the RRU that belongs to cooperative base station in the current cooperation RRU set, then current dominant base by described cooperative base station to the RRU converting downlink data that belong to this cooperative base station, simultaneously, current dominant base belongs to this base station in current cooperation RRU set RRU sends downlink data, and current cooperation RRU set is sent to UE;

Each RRU in the current cooperation RRU set unites to UE transmission downlink data, realizes the down collaboration transmission between the base station.

If have the RRU that belongs to cooperative base station in the current cooperation RRU set, before the step of the RRU converting downlink data that belong to this cooperative base station, this method further comprises described current dominant base by described cooperative base station:

Current dominant base sends the cooperation request to each cooperative base station respectively, and the RRU that request belongs to this cooperative base station in will described current cooperation RRU set is used for the down collaboration of UE is transmitted;

Judge in the current cooperation RRU set whether have the RRU that belongs to cooperative base station, if then continue to carry out described current dominant base by the step of described cooperative base station to the RRU converting downlink data that belong to this cooperative base station.

Each RRU in the described current cooperation RRU set unites to UE transmission downlink data, realizes that the method for the down collaboration transmission between the base station comprises:

Current dominant base obtain that UE reports with current dominant base and the relevant channel condition information of all cooperative base station, and the channel condition information relevant with all cooperative base station be transmitted to each corresponding cooperative base station;

Current dominant base and each cooperative base station are each RRU configuration transmission parameter in the described current cooperation RRU set according to described channel condition information;

Each RRU in the described current cooperation RRU set is according to the transmission parameter of configuration, the downlink data that receives united send to UE, realizes the down collaboration transmission between the base station.

Current dominant base each RRU in current cooperation RRU set sends downlink data, and current cooperation RRU set is sent to UE;

Current dominant base obtains the channel condition information relevant with current dominant base that UE reports, and is each RRU configuration transmission parameter in the described current cooperation RRU set according to described channel condition information;

Each RRU in the described current cooperation RRU set is according to the transmission parameter of configuration, the downlink data that receives united send to UE, realizes down collaboration transmission in the station.

A kind of system of cooperation between base stations, this system comprises: UE, current dominant base and belong to the RRU of this base station, and cooperative base station and belong to the RRU of each cooperative base station;

UE is used to receive the request of measuring of eating dishes without rice or wine that current dominant base sends, and the measurement report that obtains is returned to current dominant base; Also be used for when uplink, upstream data is sent to the RRU of current area and each neighbor cell, when downlink transfer, receive the current cooperation RRU set that current dominant base sends and receive the downlink data that each RRU in this current cooperation RRU set unites transmission;

Current dominant base, be used for eating dishes without rice or wine to measure request and receiving the measurement report that it returns, determine current cooperation RRU set, if there is the RRU that belongs to cooperative base station in current cooperation RRU in gathering to the UE transmission, when uplink, to its upstream data that receives of described cooperative base station request from UE; When downlink transfer, to the RRU converting downlink data that belong to this cooperative base station, and the RRU that belongs to this base station in current cooperation RRU set sends downlink data by described cooperative base station, simultaneously, current cooperation RRU gathered sends to UE;

Cooperative base station is used for when uplink, and according to the request of current dominant base, the upstream data from UE that the RRU that belongs to this cooperative base station in the current cooperation RRU set is received is transmitted to current dominant base; Also be used for when downlink transfer, the downlink data that current dominant base is sent is transmitted to the RRU that belongs to this cooperative base station in the current cooperation RRU set;

Each RRU in the current cooperation RRU set is used for when uplink, and the upstream data from UE that receives is sent to current dominant base, realizes the uplink coordinated transmission between the base station; When downlink transfer, the downlink data that receives united send to UE, realize the down collaboration transmission between the base station.

Described current dominant base comprises:

Measure interactive module, be used for eating dishes without rice or wine to measure request and receiving the measurement report that it returns, described measurement report is sent to cooperation set generation module to the UE transmission;

Cooperation set generation module, be used to receive the measurement report of measuring the interactive module transmission, in measurement report, the RRU that the value of designated cell parameter is higher than each sub-district correspondence of preset value is defined as current cooperation RRU set, and current cooperation RRU set is sent to judge module;

Judge module is used for judging whether current cooperation RRU set exists the RRU that belongs to cooperative base station, if then the judged result notice is striden the base station collaboration Executive Module;

Stride the base station collaboration Executive Module, be used to receive the judged result of judge module, when uplink, to its upstream data that receives of described cooperative base station request from UE; When downlink transfer, by described cooperative base station to the RRU converting downlink data that belong to this cooperative base station, and the RRU that belongs to this base station in current cooperation RRU set sends downlink data, simultaneously, current cooperation RRU set is sent to UE, receive that UE reports with current dominant base and the relevant channel condition information of all cooperative base station, and the channel condition information relevant with all cooperative base station be transmitted to each corresponding cooperative base station, according to described channel condition information the RRU configuration transmission parameter that belongs to current dominant base in the current cooperation RRU set;

Correspondingly, described cooperative base station, be further used for receiving the described channel condition information relevant that the base station collaboration Executive Module is transmitted of striding, and be the RRU configuration transmission parameter that belongs to this cooperative base station in the current cooperation RRU set according to described channel condition information with this cooperative base station;

Each RRU in the described current cooperation RRU set is further used for when downlink transfer, utilizes the transmission parameter of configuration, is guaranteeing under the synchronous condition, the downlink data that receives is united send to UE, realizes the down collaboration transmission between the base station.

Described current dominant base comprises:

Judge module, be used for judging whether current cooperation RRU set exists the RRU that belongs to cooperative base station, if, notice cooperation request module also receives the final current cooperation RRU set that the cooperation request module is returned, further judge in the final current cooperation RRU set and whether have the RRU that belongs to cooperative base station, if then the judged result notice is striden the base station collaboration Executive Module;

Described cooperation request module, be used for sending the cooperation request to each cooperative base station, the RRU that belongs to this cooperative base station during will the be described current cooperation of request RRU gathers is used for the cooperation transmission to UE, receive the message that cooperative base station is returned, determine final current cooperation RRU set, and final current cooperation RRU set is returned to judge module;

Correspondingly, cooperative base station is further used for receiving the cooperation request that the cooperation request module is sent, judge whether to allow described cooperation request according to the current state that belongs to the RRU of this cooperative base station in the described current cooperation RRU set, if allow then return the cooperation acknowledge message, otherwise refuse described cooperation request; Also be used to receive the described channel condition information relevant that the base station collaboration Executive Module is transmitted of striding, and be the RRU configuration transmission parameter that belongs to this cooperative base station in the current cooperation RRU set according to described channel condition information with this cooperative base station;

Described current dominant base further comprises cooperation Executive Module in the station;

Described judge module is when being further used for not having the RRU that belongs to cooperative base station in judging current cooperation RRU set, with cooperation Executive Module in the judged result notice station;

The cooperation Executive Module is used for when uplink in the described station, receives the upstream data from UE that each RRU in the current cooperation RRU set sends; When downlink transfer, each RRU in current cooperation RRU set sends downlink data, and current cooperation RRU set is sent to UE.

A kind of base station, this base station comprises:

The dominant base module, in described base station during as current dominant base, be used for eating dishes without rice or wine to measure request and receiving the measurement report that it returns to the UE transmission, determine current cooperation RRU set, if have the RRU that belongs to cooperative base station in the current cooperation RRU set, when uplink, to its upstream data that receives of described cooperative base station request from UE; When downlink transfer, to the RRU converting downlink data that belong to this cooperative base station, and the RRU that belongs to this base station in current cooperation RRU set sends downlink data by described cooperative base station, simultaneously, current cooperation RRU gathered sends to UE;

The cooperative base station module, is used for when uplink during as cooperative base station in described base station, and according to the request of current dominant base, the upstream data from UE that the RRU that belongs to this cooperative base station in the current cooperation RRU set is received is transmitted to current dominant base; Also be used for when downlink transfer, the downlink data that current dominant base is sent is transmitted to the RRU that belongs to this cooperative base station in the current cooperation RRU set.

Described dominant base module comprises:

Measure interactive unit, be used for eating dishes without rice or wine to measure request and receiving the measurement report that it returns, described measurement report is sent to cooperation set generation unit to the UE transmission;

Cooperation set generation unit, be used to receive the measurement report of measuring the interactive unit transmission, in measurement report, the RRU that the value of designated cell parameter is higher than each sub-district correspondence of preset value is defined as current cooperation RRU set, and current cooperation RRU set is sent to judging unit;

Judging unit is used for judging whether current cooperation RRU set exists the RRU that belongs to cooperative base station, if then the judged result notice is striden the base station collaboration performance element;

Stride the base station collaboration performance element, be used to receive the judged result of judging unit, when uplink, to its upstream data that receives of described cooperative base station request from UE; When downlink transfer, by described cooperative base station to the RRU converting downlink data that belong to this cooperative base station, and the RRU that belongs to this base station in current cooperation RRU set sends downlink data, simultaneously, current cooperation RRU set is sent to UE, receive that UE reports with current dominant base and the relevant channel condition information of all cooperative base station, and the channel condition information relevant with all cooperative base station be transmitted to each corresponding cooperative base station, according to described channel condition information the RRU configuration transmission parameter that belongs to current dominant base in the current cooperation RRU set;

Correspondingly, described cooperative base station module, in this base station during as cooperative base station, be further used for receiving the channel condition information relevant that the base station collaboration Executive Module is transmitted of striding of current dominant base, and be the RRU configuration transmission parameter that belongs to this cooperative base station in the current cooperation RRU set according to described channel condition information with this cooperative base station.

Described dominant base module comprises:

Judging unit, be used for judging whether current cooperation RRU set exists the RRU that belongs to cooperative base station, if, notice cooperation request unit also receives the final current cooperation RRU set that the cooperation request unit returns, further judge in the final current cooperation RRU set and whether have the RRU that belongs to cooperative base station, if then the judged result notice is striden the base station collaboration performance element;

Described cooperation request unit, be used for sending the cooperation request to each cooperative base station, the RRU that belongs to this cooperative base station during will the be described current cooperation of request RRU gathers is used for the cooperation transmission to UE, receive the message that cooperative base station is returned, determine final current cooperation RRU set, and final current cooperation RRU set is returned to judging unit;

Correspondingly, the cooperative base station module, in this base station during as cooperative base station, be further used for receiving the cooperation request that the cooperation request unit of current dominant base is sent, judge whether to allow described cooperation request according to the current state that belongs to the RRU of this cooperative base station in the described current cooperation RRU set, if allow then return the cooperation acknowledge message, otherwise refuse described cooperation request; Also be used to receive the channel condition information relevant that the base station collaboration Executive Module is transmitted of striding of current dominant base, and be the RRU configuration transmission parameter that belongs to this cooperative base station in the current cooperation RRU set according to described channel condition information with this cooperative base station.

Described dominant base module further comprises cooperation performance element in the station;

Described judging unit is when being further used for not having the RRU that belongs to cooperative base station in judging current cooperation RRU set, with cooperation performance element in the judged result notice station;

The cooperation performance element is used for when uplink in the described station, receives the upstream data from UE that each RRU in the current cooperation RRU set sends; When downlink transfer, each RRU in current cooperation RRU set sends downlink data, and current cooperation RRU set is sent to UE.

As seen from the above technical solutions, on the cooperation between base stations that the embodiment of the invention provides, downlink transmission method and system and base station, can in current cooperation RRU set, exist when belonging to the RRU of cooperative base station, utilize the RRU and the UE that belong to the RRU of current dominant base among the cooperation RRU and belong to cooperative base station to carry out data interaction simultaneously, realized the base station collaboration of striding of UE is transmitted, can select the best cooperation RRU set of its actual needs neatly according to the particular location at UE place, improved communications performance and the throughput of UE greatly, and then improved service quality UE.

Description of drawings

Fig. 1 is the topological structure schematic diagram of cellular network in the prior art.

Fig. 2 is the network architecture schematic diagram of distributing antenna system in the prior art.

Fig. 3 is to be its principle schematic of selecting cooperation RRU set according to the diverse location of UE in distributing antenna system in the prior art.

Fig. 4 is the schematic diagram of two kinds of different configuration modes of the many antennas of single base station configuration in the prior art.

Fig. 5 is the schematic flow sheet of the ascending transmission method of cooperation between base stations in the embodiment of the invention.

Fig. 6 is the schematic flow sheet of the downlink transmission method of cooperation between base stations in the embodiment of the invention.

Fig. 7 is the composition structural representation of the system of cooperation between base stations in the embodiment of the invention.

Fig. 8 is the composition structural representation of base station in the embodiment of the invention.

Embodiment

For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.

The embodiment of the invention at first provides a kind of ascending transmission method of cooperation between base stations, its flow process as shown in Figure 5, comprising:

Step 501: current dominant base (Anchor Cell) sends the request of measuring of eating dishes without rice or wine to the UE that is positioned at its sub-district;

Step 502:UE sends measurement report to current dominant base after receiving the request of measuring of eating dishes without rice or wine;

After UE receives the request of measuring of eating dishes without rice or wine, can measure the designated cell parameter of UE sub-district, current place and adjacent each sub-district thereof, and described measured value is included in returns to current dominant base in the measurement report, described designated cell parameter can be cell power or other preassigned parameter types, do not do concrete qualification herein, related content is those skilled in the art's a common practise, no longer launches explanation herein.In addition, understand easily, for the LTE-A system, the measurement report of described UE promptly is equivalent to Reference Signal Received Power (Reference Signal Receiving Power, RSRP) measurement report.

Step 503: after current dominant base is received the measurement report that UE returns, determine current cooperation RRU set; If judge in the current cooperation RRU set to have the RRU that belongs to cooperative base station, then current dominant base is to its upstream data from UE that receives of described cooperative base station request;

Because in the current cooperation RRU set of determining in the step 503, both comprised the RRU that belongs to current dominant base, also might there be the RRU that does not belong to current dominant base, distinguish for convenience and easily, in described current cooperation RRU set, the base station that does not belong under the RRU of current dominant base is called cooperative base station, has RRU to be selected to be used to the cooperation transmission that participates in UE at this moment in order to represent this base station, cooperative base station is hereinafter all represented identical meanings, explanation no longer one by one.In addition, of particular note, cooperative base station itself may comprise a plurality of RRU, and each RRU that might not cooperative base station can be selected the cooperation transmission that is used for UE.

Current dominant base is with in the measurement report, and the RRU that the value of designated cell parameter is higher than each sub-district correspondence of preset value is defined as current cooperation RRU set.For example, when described designated cell parameter was cell power, the RRU that just cell power in the measurement report is higher than all sub-district correspondences of default performance number was defined as current cooperation RRU set.

Step 504: guaranteeing under the synchronous condition that the upstream data from UE that each RRU in the described current cooperation RRU set will receive sends to current dominant base, finishes Combined Treatment by current dominant base, realizes the uplink coordinated transmission between the base station.

In step 503, each RRU in the current cooperation RRU set of determining, might be occupied owing to be in other operating states, cause to be used for cooperation transmission to UE, therefore, availability for the RRU in the current cooperation RRU set that guarantees to determine, preferably, after in judging current cooperation RRU set, having the step of the RRU that belongs to cooperative base station, before the current dominant base step that it receives to described cooperative base station request from the upstream data of UE, this method further comprises:

At last, understand easily, if do not have the RRU that belongs to cooperative base station in the current cooperation RRU set, the interior cooperation that then is equivalent to stand, correspondingly, this moment, this method further comprised:

Guaranteeing under the synchronous condition that the upstream data from UE that each RRU in the described current cooperation RRU set will receive sends to current dominant base, realizes uplink coordinated transmission in the station.

The embodiment of the invention also provides a kind of downlink transmission method of cooperation between base stations, its flow process as shown in Figure 6, comprising:

Step 601: current dominant base sends the request of measuring of eating dishes without rice or wine to the UE that is positioned at its sub-district;

Step 602:UE sends measurement report to current dominant base after receiving the request of measuring of eating dishes without rice or wine;

After UE receives the request of measuring of eating dishes without rice or wine, can measure the designated cell parameter of UE sub-district, current place and adjacent each sub-district thereof, and described measured value is included in returns to current dominant base in the measurement report, described designated cell parameter can be cell power or other preassigned parameter types, do not do concrete qualification herein, related content is those skilled in the art's a common practise, no longer launches explanation herein.In addition, understand easily, for the LTE-A system, the measurement report of described UE promptly is equivalent to the RSRP report.

Step 603: after current dominant base is received the measurement report that UE returns, determine current cooperation RRU set; If judge in the current cooperation RRU set and have the RRU that belongs to cooperative base station, then current dominant base by described cooperative base station to the RRU converting downlink data that belong to this cooperative base station, simultaneously, current dominant base belongs to current dominant base in current cooperation RRU set RRU sends downlink data, and current cooperation RRU set is sent to UE;

Step 604: each RRU in the described current cooperation RRU set guaranteeing under the synchronous condition, the downlink data that receives united send to UE, realizes the down collaboration transmission between the base station.

The method of step 604 specifically comprises:

Each RRU in the described current cooperation RRU set guaranteeing under the synchronous condition according to the transmission parameter of configuration, the downlink data that receives united send to UE, realizes the down collaboration transmission between the base station.

In step 603, each RRU in the current cooperation RRU set of determining, might be occupied owing to be in other operating states, cause to be used for cooperation transmission to UE, therefore, availability for the RRU in the current cooperation RRU set that guarantees to determine, preferably, after in judging current cooperation RRU set, having the step of the RRU that belongs to cooperative base station, before the step of the RRU converting downlink data that belong to this cooperative base station, this method further comprises current dominant base by described cooperative base station:

Similarly, understand easily, if do not have the RRU that belongs to cooperative base station in the current cooperation RRU set, the interior cooperation that then is equivalent to stand, correspondingly, this moment, this method further comprised:

Each RRU in the described current cooperation RRU set guaranteeing under the synchronous condition according to the transmission parameter of configuration, the downlink data that receives united send to UE, realizes down collaboration transmission in the station.

The embodiment of the invention also provides a kind of system of cooperation between base stations, and it forms structure as shown in Figure 7, comprising UE710, current dominant base 720 and belong to the RRU of this base station, and cooperative base station 730 and belong to the RRU of each cooperative base station;

UE710 is used to receive the request of measuring of eating dishes without rice or wine that current dominant base 720 sends, and the measurement report that obtains is returned to current dominant base 720; Also be used for when uplink, upstream data is sent to the RRU of current area and each neighbor cell, when downlink transfer, receive the current cooperation RRU set that current dominant base 720 sends and receive the downlink data that each RRU in this current cooperation RRU set unites transmission;

Current dominant base 720 is used for eating dishes without rice or wine to measure request and receiving the measurement report that it returns to the UE710 transmission, determines current cooperation RRU set, and judges in the current cooperation RRU set whether have the RRU that belongs to cooperative base station 730; If, then when uplink, to described cooperative base station 730 its upstream datas that receive of request from UE710; And when downlink transfer, then by described cooperative base station 730 to the RRU converting downlink data that belong to this cooperative base station 730, and the RRU that belongs to this base station in current cooperation RRU set sends downlink data, simultaneously, current cooperation RRU gathered sends to UE710;

Cooperative base station 730 is used for when uplink, and according to the request of current dominant base, the upstream data from UE710 that the RRU that belongs to this cooperative base station 730 in the current cooperation RRU set is received is transmitted to current dominant base 720; Also be used for when downlink transfer, the downlink data that current dominant base 720 is sent is transmitted to the RRU that belongs to this cooperative base station 730 in the current cooperation RRU set;

Each RRU in the current cooperation RRU set is used for when uplink, guaranteeing under the synchronous condition upstream data from UE710 that receives to be sent to current dominant base 720, realizes the uplink coordinated transmission between the base station; When downlink transfer, guaranteeing under the synchronous condition, the downlink data that receives is united send to UE710, realize the down collaboration transmission between the base station.

Wherein, described current dominant base 720 comprises measurement interactive module 721, cooperation set generation module 722, judge module 723 and strides base station collaboration Executive Module 724;

Measure interactive module 721, be used for eating dishes without rice or wine to measure request and receiving the measurement report that it returns, described measurement report is sent to cooperation set generation module 722 to the UE710 transmission;

Cooperation set generation module 722, be used to receive the measurement report of measuring interactive module 721 transmissions, in measurement report, the RRU that the value of designated cell parameter is higher than each sub-district correspondence of preset value is defined as current cooperation RRU set, and current cooperation RRU set is sent to judge module 723;

Judge module 723 is used for judging whether current cooperation RRU set exists the RRU that belongs to cooperative base station 730, if then the judged result notice is striden base station collaboration Executive Module 724;

Stride base station collaboration Executive Module 724, be used to receive the judged result of judge module 723, when uplink, to described cooperative base station 730 its upstream datas that receive of request from UE710; And when downlink transfer, then by described cooperative base station 730 to the RRU converting downlink data that belong to this cooperative base station 730, and the RRU that belongs to this base station in current cooperation RRU set sends downlink data, simultaneously, current cooperation RRU set is sent to UE710, the channel condition information relevant that receives that UE710 reports with current dominant base 720 and all cooperative base station 730, and the channel condition information relevant with all cooperative base station 730 be transmitted to each corresponding cooperative base station 730, according to described channel condition information the RRU configuration transmission parameter that belongs to current dominant base in the current cooperation RRU set;

Correspondingly, described cooperative base station 730, be further used for receiving and describedly stride base station collaboration Executive Module 724 channel condition information relevant that transmit, and be that the RRU that belongs to this cooperative base station 730 in the current cooperation RRU set disposes transmission parameter according to described channel condition information with this cooperative base station 730;

Each RRU in the described current cooperation RRU set then is further used for when downlink transfer, utilizes the transmission parameter of configuration, is guaranteeing under the synchronous condition, the downlink data that receives is united send to UE710, realizes the down collaboration transmission between the base station.

Because each RRU in the current cooperation RRU set of determining, may be in other operating states and occupied, cause to be used for current cooperation transmission to UE, therefore, availability for the RRU in the current cooperation RRU set that guarantees to determine, preferably, the embodiment of the invention also provides the structure of another current dominant base 720, at this moment, described current dominant base further comprises cooperation request module 725, correspondingly its with described current dominant base 720 in other module and and the annexation of cooperative base station 730 as shown in phantom in Figure 7;

At this moment, described judge module 723, be used for judging whether current cooperation RRU set exists the RRU that belongs to cooperative base station 730, if, notice cooperation request module 725 also receives the final current cooperation RRU set that cooperation request module 725 is returned, further judge in the final current cooperation RRU set whether have the RRU that belongs to cooperative base station 730, if then the judged result notice is striden base station collaboration Executive Module 724;

Described cooperation request module 725, be used for sending the cooperation request to each cooperative base station 730, the RRU that belongs to this cooperative base station 730 during will the be described current cooperation of request RRU gathers is used for the cooperation transmission to UE710, receive the message that cooperative base station 730 is returned, determine final current cooperation RRU set, and final current cooperation RRU set is returned to judge module 723;

Correspondingly, this moment, cooperative base station 730 was further used for receiving the cooperation request that cooperation request module 725 is sent, judge whether to allow described cooperation request according to the current state that belongs to the RRU of this cooperative base station 730 in the described current cooperation RRU set, if allow then return the cooperation acknowledge message, otherwise refuse described cooperation request.

At last, understand easily, if do not have the RRU that belongs to cooperative base station in the current cooperation RRU set, the interior cooperation that then is equivalent to stand, correspondingly, this moment, current dominant base 720 further comprised cooperation Executive Module 726 in the station;

Described judge module 723 is when being further used for not having the RRU that belongs to cooperative base station 730 in judging current cooperation RRU set, with cooperation Executive Module 726 in the judged result notice station;

Cooperation Executive Module 726 is used for when uplink in the described station, receives the upstream data from UE710 that each RRU in the current cooperation RRU set sends; When downlink transfer, each RRU in current cooperation RRU set sends downlink data, and current cooperation RRU set sent to UE710, the channel condition information relevant with current dominant base 710 that receives that UE710 reports is that each RRU in the described current cooperation RRU set disposes transmission parameter according to described channel condition information;

Correspondingly, each RRU in described current cooperation RRU set this moment guaranteeing under the synchronous condition according to the transmission parameter of configuration, the downlink data that receives united send to UE710, realizes down collaboration transmission in the station.

By as seen above-mentioned, the uplink and downlink transmission method and the system of the cooperation between base stations that the embodiment of the invention provides, can in current cooperation RRU set, exist when belonging to the RRU of cooperative base station, utilize the RRU and the UE that belong to the RRU of current dominant base among the cooperation RRU and belong to cooperative base station to carry out data interaction simultaneously, realized the base station collaboration of striding of UE is transmitted, can select the best cooperation RRU set of its actual needs neatly according to the particular location at UE place, improved communications performance and the throughput of UE greatly, and then improved service quality UE.

At last, the embodiment of the invention also provides a kind of base station, and it forms structure as shown in Figure 8, comprising: dominant base module 810 and cooperative base station module 820;

Described dominant base module 810, when being used in described base station as current dominant base, eat dishes without rice or wine to measure request and receive the measurement report that it returns to the UE transmission, determine current cooperation RRU set, if have the RRU that belongs to cooperative base station in the current cooperation RRU set, when uplink, to its upstream data that receives of described cooperative base station request from UE; When downlink transfer, to the RRU converting downlink data that belong to this cooperative base station, and the RRU that belongs to this base station in current cooperation RRU set sends downlink data by described cooperative base station, simultaneously, current cooperation RRU gathered sends to UE;

Described cooperative base station module 820, when being used in described base station as cooperative base station, when uplink, according to the request of current dominant base, the upstream data from UE that the RRU that belongs to this cooperative base station in the current cooperation RRU set is received is transmitted to current dominant base; Also be used for when downlink transfer, the downlink data that current dominant base is sent is transmitted to the RRU that belongs to this cooperative base station in the current cooperation RRU set.

Wherein, described dominant base module 810 further comprises measurement interactive unit 811, cooperation set generation unit 812, judging unit 813 and strides base station collaboration performance element 814;

Described measurement interactive unit 811 is used for eating dishes without rice or wine to measure request and receiving the measurement report that it returns to the UE transmission, and described measurement report is sent to cooperation set generation unit 812;

Described cooperation set generation unit 812, be used to receive the measurement report of measuring interactive unit 811 transmissions, in measurement report, the RRU that the value of designated cell parameter is higher than each sub-district correspondence of preset value is defined as current cooperation RRU set, and current cooperation RRU set is sent to judging unit 813;

Described judging unit 813 is used for judging whether current cooperation RRU set exists the RRU that belongs to cooperative base station, if then the judged result notice is striden base station collaboration performance element 814;

The described base station collaboration performance element 814 of striding is used to receive the judged result of judging unit 813, when uplink, to its upstream data from UE that receives of described cooperative base station request; When downlink transfer, by described cooperative base station to the RRU converting downlink data that belong to this cooperative base station, and the RRU that belongs to this base station in current cooperation RRU set sends downlink data, simultaneously, current cooperation RRU set is sent to UE, receive that UE reports with current dominant base and the relevant channel condition information of all cooperative base station, and the channel condition information relevant with all cooperative base station be transmitted to each corresponding cooperative base station, according to described channel condition information the RRU configuration transmission parameter that belongs to current dominant base in the current cooperation RRU set;

Correspondingly, described cooperative base station module 820, when being used in this base station as cooperative base station, further receive the channel condition information relevant that base station collaboration Executive Module 814 is transmitted of striding of current dominant base, and be the RRU configuration transmission parameter that belongs to this cooperative base station in the current cooperation RRU set according to described channel condition information with this cooperative base station.

Because each RRU in the current cooperation RRU set of determining, may be in other operating states and occupied, cause to be used for current cooperation transmission to UE, therefore, availability for the RRU in the current cooperation RRU set that guarantees to determine, preferably, the embodiment of the invention also provides the structure of another dominant base module 810, at this moment, described dominant base module 810 further comprises cooperation request module 815, correspondingly the annexation of other module in itself and the described dominant base module 810 and unit as shown in phantom in Figure 8, at this moment, described dominant base module 810 comprises:

Measure interactive unit 811, be used for eating dishes without rice or wine to measure request and receiving the measurement report that it returns, described measurement report is sent to cooperation set generation unit 812 to the UE transmission;

Cooperation set generation unit 812, be used to receive the measurement report of measuring interactive unit 811 transmissions, in measurement report, the RRU that the value of designated cell parameter is higher than each sub-district correspondence of preset value is defined as current cooperation RRU set, and current cooperation RRU set is sent to judging unit 813;

Judging unit 813, be used for judging whether current cooperation RRU set exists the RRU that belongs to cooperative base station, if, notice cooperation request unit 815 also receives the final current cooperation RRU set that cooperation request unit 815 returns, further judge in the final current cooperation RRU set and whether have the RRU that belongs to cooperative base station, if then the judged result notice is striden base station collaboration performance element 814;

Described cooperation request unit 815, be used for sending the cooperation request to each cooperative base station, the RRU that belongs to this cooperative base station during will the be described current cooperation of request RRU gathers is used for the cooperation transmission to UE, receive the message that cooperative base station is returned, determine final current cooperation RRU set, and final current cooperation RRU set is returned to judging unit 813;

Stride base station collaboration performance element 814, be used to receive the judged result of judging unit 813, when uplink, to its upstream data that receives of described cooperative base station request from UE; When downlink transfer, by described cooperative base station to the RRU converting downlink data that belong to this cooperative base station, and the RRU that belongs to this base station in current cooperation RRU set sends downlink data, simultaneously, current cooperation RRU set is sent to UE, receive that UE reports with current dominant base and the relevant channel condition information of all cooperative base station, and the channel condition information relevant with all cooperative base station be transmitted to each corresponding cooperative base station, according to described channel condition information the RRU configuration transmission parameter that belongs to current dominant base in the current cooperation RRU set;

Correspondingly, in this base station during as cooperative base station, its cooperative base station module is further used for receiving the cooperation request that the cooperation request unit 815 of current dominant base is sent 820 this moments, judge whether to allow described cooperation request according to the current state that belongs to the RRU of this cooperative base station in the described current cooperation RRU set, if allow then return the cooperation acknowledge message, otherwise refuse described cooperation request; Also be used for receiving the channel condition information relevant of striding 814 forwardings of base station collaboration Executive Module, and be the RRU configuration transmission parameter that belongs to this cooperative base station in the current cooperation RRU set according to described channel condition information with this cooperative base station as the base station of current dominant base.

Understand easily, if do not have the RRU that belongs to cooperative base station in the current cooperation RRU set, the interior cooperation that then is equivalent to stand, correspondingly, described dominant base module 810 further comprises cooperation performance element 816 in the station;

Described judging unit 813 is when being further used for not having the RRU that belongs to cooperative base station in judging current cooperation RRU set, with cooperation performance element 816 in the judged result notice station;

Cooperation performance element 816 is used for when uplink in the described station, receives the upstream data from UE that each RRU in the current cooperation RRU set sends; When downlink transfer, each RRU in current cooperation RRU set sends downlink data, and current cooperation RRU set sent to UE, receiving the channel condition information relevant with current dominant base that UE reports, is that each RRU in the described current cooperation RRU set disposes transmission parameter according to described channel condition information.

By as seen above-mentioned, the base station that the embodiment of the invention provides, can in current cooperation RRU set, exist when belonging to the RRU of cooperative base station, utilize the RRU and the UE that belong to the RRU of current dominant base among the cooperation RRU and belong to cooperative base station to carry out data interaction simultaneously, realized the base station collaboration of striding of UE is transmitted, can select the best cooperation RRU set of its actual needs neatly according to the particular location at UE place, improved communications performance and the throughput of UE greatly, and then improved service quality UE.

Claims

1. the ascending transmission method of a cooperation between base stations is characterized in that, this method comprises:

2. method according to claim 1 is characterized in that, the described method of determining that current cooperation RRU gathers comprises:

3. method according to claim 1 and 2, it is characterized in that, if have the RRU that belongs to cooperative base station in the current cooperation RRU set, before the described current dominant base step that it receives to described cooperative base station request from the upstream data of UE, this method further comprises:

4. method according to claim 3 is characterized in that, when not having the RRU that belongs to cooperative base station in judging current cooperation RRU set, this method further comprises:

5. the downlink transmission method of a cooperation between base stations is characterized in that, this method comprises:

6. method according to claim 5 is characterized in that, the described method of determining that current cooperation RRU gathers comprises:

7. method according to claim 6, it is characterized in that, if have the RRU that belongs to cooperative base station in the current cooperation RRU set, before the step of the RRU converting downlink data that belong to this cooperative base station, this method further comprises described current dominant base by described cooperative base station:

8. according to each described method in the claim 5 to 7, it is characterized in that each RRU in the described current cooperation RRU set unites to UE transmission downlink data, realize that the method for the down collaboration transmission between the base station comprises:

9. method according to claim 8 is characterized in that, when not having the RRU that belongs to cooperative base station in judging current cooperation RRU set, this method further comprises:

10. the system of a cooperation between base stations is characterized in that, this system comprises: UE, current dominant base and belong to the RRU of this base station, and cooperative base station and belong to the RRU of each cooperative base station;

11. system according to claim 10 is characterized in that, described current dominant base comprises:

12. system according to claim 10 is characterized in that, described current dominant base comprises:

13., it is characterized in that described current dominant base further comprises cooperation Executive Module in the station according to claim 11 or 12 described systems;

14. a base station is characterized in that, this base station comprises:

15. base station according to claim 14 is characterized in that, described dominant base module comprises:

16. system according to claim 14 is characterized in that, described dominant base module comprises:

17., it is characterized in that described dominant base module further comprises cooperation performance element in the station according to claim 15 or 16 described systems;