CN105765891A - Data transmission method and base station - Google Patents

Data transmission method and base station Download PDF

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Publication number
CN105765891A
CN105765891A CN201480033075.8A CN201480033075A CN105765891A CN 105765891 A CN105765891 A CN 105765891A CN 201480033075 A CN201480033075 A CN 201480033075A CN 105765891 A CN105765891 A CN 105765891A
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rru
rsrp
csi
dmrs
frequency resource
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CN105765891B (en
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代建设
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/04—Error control

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Provided in an embodiment of the present invention are a data transmission method and a base station, being applied in a cell with a plurality of radio remote units (RRU), and the method comprises: determining that a UE located in the cell is an independent-scheduling UE, the independent-scheduling UE indicating that the UE is only located within coverage of a first RRU in a plurality of RRUs; transmitting via the first RRU a first channel state information-reference signal (CSI-RS) and a first demodulation reference signal (DMRS) on a first time-frequency resource, transmitting via the second RRU a second channel state information-reference signal (CSI-RS) and a second demodulation reference signal (DMRS) on a second time-frequency resource, the first CSI-RS being used for a channel measurement by the independent-scheduling UE, the first DMRS being used for a data demodulation by the independent-scheduling UE, and the second RRU comprising the RRUs except the first RRU of the plurality of RRUs. The embodiment of the present invention improves UE throughput rate.

Description

Method and base station for data transfer Technical field
The present invention relates to the communications field, more particularly to a kind of method and base station for data transfer.
Background technology
In existing many Remote Radio Unit (Radio Remote Unit, RRU) altogether in cell networking scheme, further to lift the capacity of the common cells of many RRU, in many RRU altogether cell, user equipment positioned at RRU centers can use identical resource to be respectively transmitted data, and the user equipment is referred to as independent scheduling user's set；The user equipment that RRU coverings are had a common boundary can combine transmission data, and the user equipment is referred to as combined dispatching user equipment.
Because independent scheduling user's set only takes up single RRU running time-frequency resource, i.e., different RRU can be that different data are sent to different independent scheduling user's sets on identical running time-frequency resource, realize resource multiplex.But reference signal (the Reference Signal that the user equipment of independent scheduling is received, RS signal intensity and signal quality) is higher than Physical Downlink Shared Channel (the Physical Downlink Shared Channel received, PDSCH signal intensity) and signal quality, i.e. RS and PDSCH channels are mismatched, and independent scheduling user's set is measured and demodulated based on RS, therefore the throughput of user equipment can be caused to decline.
The content of the invention
The embodiments of the invention provide a kind of method for data transfer and base station, the throughput of user equipment can be lifted.
First aspect is there is provided a kind of method for data transfer, and applied in multiple radio frequency remote unit RRUs altogether cell, this method includes：It is determined that the user equipment (UE) in the cell is independent scheduling UE, wherein, this is independently dispatched UE and represented in the coverage for the first RRU that the UE is only located in the plurality of RRU；First channel state information reference signals CSI-RS and the first demodulated reference signal DMRS are sent on the first running time-frequency resource by the first RRU, second channel state information reference signals CSI-RS and the second demodulated reference signal DMRS are sent on the second running time-frequency resource by the 2nd RRU, first CSI-RS independently dispatches UE for this and carries out channel measurement, first DMRS independently dispatches UE for this and is demodulated data, wherein, the 2nd RRU includes the RRU in addition to the first RRU in the plurality of RRU.
With reference in a first aspect, in the first possible implementation, the determination is located at the use in the cell Family equipment UE is independent scheduling UE, including：Determine that the UE is independent scheduling UE according to the plurality of RRU to the UE in the cell multiple reference signal receiving intensity RSRP.
With reference to the first possible implementation, in second of possible implementation, multiple reference signal receiving intensity RSRP that the UE in the cell is reached according to the plurality of RRU determine that the UE is independent scheduling UE, including：Determine that the plurality of RRU reaches multiple RSRP of the UE, wherein, each RRU that the plurality of RSRP is included in the plurality of RRU reaches the RSRP of the UE；Determine that the RRU in the first RRU that the corresponding RRU of maximum RSRP in the plurality of RSRP are the UE, the plurality of RRU in addition to the first RRU is the 2nd RRU；When the ratio of the RSRP sums of all RRU in the first RRU RSRP and the 2nd RRU is more than predetermined threshold value, it is independent scheduling UE to determine the UE.
With reference to second of possible implementation, in the third possible implementation, this method also includes：The plurality of RRU of correspondence of UE transmissions multiple uplink reference signals are received, wherein, the plurality of uplink reference signals include the uplink reference signals of each RRU in the plurality of RRU of correspondence, wherein, the plurality of RRU of the determination reaches multiple RSRP of the UE, including：Measured according to the plurality of uplink reference signals, obtain the UE to the plurality of RRU RSRP；The plurality of RRU to the UE multiple RSRP are determined according to the UE to the plurality of RRU RSRP.
With reference to first aspect, first to the possible implementation of any of the third possible implementation, in the 4th kind of possible implementation, first channel state information reference signals CSI-RS and the first demodulated reference signal DMRS should be sent on the first running time-frequency resource by the first RRU, second channel state information reference signals CSI-RS and the second demodulated reference signal DMRS are sent on the second running time-frequency resource by the 2nd RRU, including：Position is launched according to different signals the first CSI-RS and the first DMRS is sent on the first running time-frequency resource by the first RRU, 2nd CSI-RS and the 2nd DMRS is sent on the second running time-frequency resource by the 2nd RRU, or according to scrambler sequence NSCID difference, first CSI-RS and the first DMRS is sent on the first running time-frequency resource by the first RRU, the 2nd CSI-RS and the 2nd DMRS is sent on the second running time-frequency resource by the 2nd RRU.
With reference to the 4th kind of possible implementation, in the 5th kind of possible implementation, this is according to NSCID difference, first CSI-RS and the first DMRS is sent on the first running time-frequency resource by the first RRU, 2nd CSI-RS and the 2nd DMRS is sent on the second running time-frequency resource by the 2nd RRU, including：When NSCID values are 0, the first CSI-RS and the first DMRS is sent on the first running time-frequency resource by the first RRU, when NSCID values are 1, the 2nd CSI-RS and the 2nd DMRS is sent on the second running time-frequency resource by the 2nd RRU.
Second aspect there is provided a kind of base station, including：Determining unit, the user equipment (UE) for determining to be located in the cell is independent scheduling UE, wherein, this is independently dispatched UE and represented in the coverage for the first RRU that the UE is only located in the plurality of RRU；Transmitting element, for sending the first channel state information reference signals CSI-RS and the first demodulated reference signal DMRS on the first running time-frequency resource by the first RRU, second channel state information reference signals CSI-RS and the second demodulated reference signal DMRS are sent on the second running time-frequency resource by the 2nd RRU, first CSI-RS independently dispatches UE for this and carries out channel measurement, first DMRS independently dispatches UE for this and is demodulated data, wherein, the 2nd RRU includes the RRU in addition to the first RRU in the plurality of RRU.
With reference to second aspect, in the first possible implementation, the determining unit determines that the UE is independent scheduling UE according to the plurality of RRU to the UE in the cell multiple RSRP.
With reference to the first possible implementation of second aspect, in second of possible implementation, the determining unit determines that the plurality of RRU reaches multiple RSRP of the UE, wherein, each RRU that the plurality of RSRP is included in the plurality of RRU reaches the RSRP of the UE；Determine that the RRU in the first RRU that the corresponding RRU of maximum RSRP in the plurality of RSRP are the UE, the plurality of RRU in addition to the first RRU is the 2nd RRU；When the ratio of the RSRP sums of all RRU in the first RRU RSRP and the 2nd RRU is more than predetermined threshold value, it is independent scheduling UE to determine the UE.
With reference to second of possible implementation of second aspect, in the third possible implementation, the base station also includes receiving unit, for the multiple uplink reference signals for the plurality of RRU of correspondence for receiving UE transmissions, wherein, the plurality of uplink reference signals include the uplink reference signals of each RRU in the plurality of RRU of correspondence, wherein, the determining unit is measured according to the plurality of uplink reference signals, obtains the UE to the plurality of RRU RSRP；The plurality of RRU to the UE multiple RSRP are determined according to the UE to the plurality of RRU RSRP.
With reference to second aspect, the first of second aspect is to the possible implementation of any of the third possible implementation, in the 4th kind of possible implementation, the transmitting element launches position according to different signals and the first CSI-RS and the first DMRS is sent on the first running time-frequency resource by the first RRU, 2nd CSI-RS and the 2nd DMRS is sent on the second running time-frequency resource by the 2nd RRU, or according to NSCID difference, first CSI-RS and the first DMRS is sent on the first running time-frequency resource by the first RRU, 2nd CSI-RS and the 2nd DMRS is sent on the second running time-frequency resource by the 2nd RRU.
With reference to the 4th kind of possible implementation of second aspect, in the 5th kind of possible implementation, When NSCID values are 0, the transmitting element sends the first CSI-RS and the first DMRS by the first RRU on the first running time-frequency resource, when NSCID values are 1, the transmitting element sends the 2nd CSI-RS and the 2nd DMRS by the 2nd RRU on the second running time-frequency resource.
Therefore, the embodiment of the present invention is independent scheduling UE by the user equipment (UE) for determining to be located in cell, and the first channel state information reference signals CSI-RS and the first demodulated reference signal DMRS are sent on the first running time-frequency resource by the first RRU, second channel state information reference signals CSI-RS and the second demodulated reference signal DMRS are sent on the second running time-frequency resource by the 2nd RRU, first CSI-RS is used for the independent UE that dispatches and carries out channel measurement, first DMRS is used for the independent UE that dispatches and is demodulated data, the embodiment of the present invention can send reference signal by different RRU in different resources, independent scheduling user's set can be made to distinguish the reference signal that different RRU are sent, the throughput of user equipment can be lifted.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, the required accompanying drawing used in the embodiment of the present invention will be briefly described below, apparently, drawings described below is only some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the applicable cell deployment scene graph of the embodiment of the present invention.
Fig. 2 is the schematic flow diagram of the method according to an embodiment of the invention for data transfer.
Fig. 3 is the schematic flow diagram of the method according to another embodiment of the present invention for data transfer.
Fig. 4 is base station according to an embodiment of the invention.
Fig. 5 is base station according to another embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained on the premise of creative work is not made should all belong to the scope of protection of the invention.
It should be understood that the technical scheme of the embodiment of the present invention can apply to various communication systems, such as：Follow-up evolution system of WCDMA (Wideband Code Division Multiple Access, WCDMA) system, Long Term Evolution (Long Term Evolution, LTE) system or LTE etc..
The embodiment of the present invention can be used for the wireless network of different standards.Radio Access Network may include different network elements in different systems.For example, the network element of Radio Access Network includes evolved base station (evolved NodeB in LTE and LTE follow-up evolution system, eNodeB) embodiment of the present invention is not limited, but for convenience of description, the base station in following embodiments will be illustrated by taking eNodeB as an example.
It will also be understood that, in embodiments of the present invention, user equipment (User Equipment, UE mobile station (Mobile Station) are included but is not limited to, MS), mobile terminal (Mobile Terminal, MT), mobile phone (Mobile Telephone), mobile phone (handset) and portable equipment (portable equipment) etc., the user equipment can be through wireless access network (Radio Access Network, RAN) communicated with one or more core nets, for example, user equipment can be mobile phone (or being " honeycomb " phone), computer with radio communication function etc., user equipment can also be portable, pocket, hand-held, built-in computer or vehicle-mounted mobile device.
It should also be understood that the base station in the embodiment of the present invention can be Wireless distributed base station, the Wireless distributed base station includes baseband processing unit (Base band Unit, BBU) and Remote Radio Unit (Radio Remote Unit, RRU).
Fig. 1 is the applicable cell deployment scene graph of the embodiment of the present invention.As shown in figure 1, cell deployment scene includes 3 RRU and 4 UE, wherein 3 RRU are respectively RRU1, RRU2 and RRU3,4 UE are respectively UE1, UE2, UE3 and UE4, wherein, UE1 and UE2 be that combined dispatching UE, UE3 and UE4 be that independence dispatches UE.
Specifically, UE3 and UE4 only take up single RRU running time-frequency resource, that is RRU3 can be respectively the UE3 data different with UE4 transmissions on identical running time-frequency resource with RRU2, realize resource multiplex, that is UE3 and UE4 are received from RRU3 and RRU2 independently transmitted data respectively, can take same running time-frequency resource.UE1 can receive the data that RRU1 and RRU2 joints are sent, and UE2 can receive the data that RRU1, RRU2 and RRU3 joint are sent.
It should be understood that the cell that illustrate only that many RRU cells in the embodiment of the present invention can include at least two RRU, the scene shown in Fig. 1 includes 3 RRU situation, the embodiment of the present invention is limited not to this.
Fig. 2 is the schematic flow diagram of the method according to an embodiment of the invention for data transfer.Method shown in figure Fig. 2 can be performed by base station.Specifically, this method includes：
210, it is determined that the user equipment (UE) in cell is independent scheduling UE, wherein, independent scheduling UE is represented in the coverage for the first RRU that UE is only located in multiple RRU.
Specifically, this, which independently dispatches UE, to be any one UE in multiple UE in the cell, And independently scheduling UE is only located in the coverage of the first RRU in multiple RRU, wherein, the first RRU can include a RRU.
220, first channel state information reference signals CSI-RS and the first demodulated reference signal DMRS are sent on the first running time-frequency resource by the first RRU, second channel state information reference signals CSI-RS and the second demodulated reference signal DMRS are sent on the second running time-frequency resource by the 2nd RRU, first CSI-RS is used for the independent UE that dispatches and carries out channel measurement, first DMRS is used for the independent UE that dispatches and is demodulated data, wherein, the 2nd RRU includes the RRU in addition to the first RRU in multiple RRU.
In other words, different channel state information reference signals (Channel State Information-Reference Signal are distributed for the first RRU and the 2nd RRU, ) and demodulated reference signal (Demodulation Reference Signal CSI-RS, DMRS) resource, so that the first RRU and the 2nd RRU send the first CSI-RS and the first DMRS and the 2nd CSI-RS and the 2nd DMRS respectively on different running time-frequency resources, also so that UE carries out channel measurement according to the first CSI-RS, data are demodulated according to the first DMRS, wherein, 2nd RRU includes the RRU in addition to the first RRU in multiple RRU.
Specifically, the 2nd RRU can include at least one RRU.
It should be understood that, it is only located at because this independently dispatches UE in the first RRU coverage, so what thing PDSCH was sent by the first RRU, so this independently dispatches UE only carries out channel measurement according to the first CSI-RS, data are only also demodulated according to the first DMRS simultaneously, reference signal and channel matched is so enabled to.
Therefore, the embodiment of the present invention is independent scheduling UE by the user equipment (UE) for determining to be located in cell, and the first channel state information reference signals CSI-RS and the first demodulated reference signal DMRS are sent on the first running time-frequency resource by the first RRU, second channel state information reference signals CSI-RS and the second demodulated reference signal DMRS are sent on the second running time-frequency resource by the 2nd RRU, first CSI-RS is used for the independent UE that dispatches and carries out channel measurement, first DMRS is used for the independent UE that dispatches and is demodulated data, the embodiment of the present invention can send reference signal by different RRU in different resources, independent scheduling user's set can be made to distinguish the reference signal that different RRU are sent, the throughput of user equipment can be lifted.
In existing method, because the RS of independent scheduling user's set is to combine to send by multiple RRU, i.e. multiple RRU send RS in same running time-frequency resource, independent scheduling UE cannot be distinguished by the RS that different RRU are sent, and independently scheduling UE PDSCH is sent by a RRU, therefore the signal intensity and signal quality for the RS that independent scheduling UE is received are higher than the PDSCH received signal intensity and signal quality, i.e. RS and PDSCH channels are mismatched, and UE be based on RS measure with Demodulation, the throughput of user equipment can be caused to decline.And the embodiment of the present invention can send reference signal by different RRU in different resources, independent scheduling user's set can be made to distinguish the reference signal that different RRU are sent, the throughput of user equipment can be lifted.
Alternatively, as another embodiment, in 210, determine that UE is independent scheduling UE according to UEs of multiple RRU into cell multiple reference signal receiving intensities (Reference Signal Receiving Power, RSRP).
Further, as another embodiment, in 210, multiple RRU to UE multiple RSRP are determined, wherein, each RRU that multiple RSRP are included in multiple RRU reaches UE RSRP；Determine that the RRU in the first RRU that the corresponding RRU of maximum RSRP in multiple RSRP are UE, multiple RRU in addition to the first RRU is the 2nd RRU；When the ratio of the RSRP sums of all RRU in the first RRU RSRP and the 2nd RRU is more than predetermined threshold value, it is independent scheduling UE to determine UE.
Alternatively, as another embodiment, this method also includes：The multiple uplink reference signals for the multiple RRU of correspondence that UE is reported are received, wherein, multiple uplink reference signals include the uplink reference signals of each RRU in the multiple RRU of correspondence,
Wherein, in 210, measured according to multiple uplink reference signals, obtain UE to multiple RRU RSRP, multiple RRU to UE multiple RSRP are determined according to UE to multiple RRU RSRP.
In other words, in 210, measured according to multiple uplink reference signals, obtain UE to the multiple RRU up RSRP；The multiple RRU to the UE multiple descending RSRP are determined according to the UE to the multiple RRU up RSRP.
Specifically, uplink reference signals can be detection reference signal (Sounding Reference Signal, SRS), according to embodiments of the present invention, the uplink reference signals for the multiple RRU of correspondence that base station can be sent according to UE determine the RSRP of multiple uplink reference signals, and calculate multiple RSRP that each descending RRU reaches UE equivalent RSRP and the UE in cell is reached as multiple RRU according to the RSRP of the plurality of uplink reference signals；Base station arranges descending equivalent RSRP descendings.Base station determines that work RRU gathers by calculating isolation, specifically, and equivalent RSRP most strong RRU are determined as the A groups RRU of the UE by base station；Remaining RRU is defined as B group RRU, afterwards, base station calculates the ratio of A groups RRU RSRP and B groups RRU RSRP sums, and the ratio is isolation；Afterwards, isolation is compared by base station with predetermined threshold value (decision threshold), if isolation is less than decision threshold, strong RSRP times RRU is changed to A groups from B groups, isolation is then calculated again, and compared with decision threshold.It is regular according to this, untill isolation is more than decision threshold, then meet this The A groups RRU of part gathers for the work RRU of the UE.Base station determines UE attribute according to RRU numbers in work RRU set.If containing only a RRU in UE work RRU set, the UE is independent scheduling user's set, wherein, a RRU is the first RRU.If there are multiple RRU in UE work RRU set, the UE is combined dispatching user.
It should be noted that RRU to UE (descending) equivalent RSRP can be equal with UE to RRU (up), or RRU reach UE equivalent RSRP can be with UE to multiple RRU RSRP positive correlations, the embodiment of the present invention limits not to this.
For example, illustrated with the UE4 in Fig. 1 scenes, UE4 can send uplink reference signals SRS to RRU1, RRU2 and RRU3 respectively, base station meeting determine the RSRP for the uplink reference signals that each RRU is received according to each RRU being directed in RRU1, RRU2 and RRU3 uplink reference signals received, and determine that each first RRU reaches UE4 RSRP according to the RSRP of each uplink reference signals.Wherein, three RSRP of the RRU (RRU1, RRU2 and RRU3) to UE4 include：The corresponding RSRP3 of RRU1 corresponding RSRP1, RRU2 corresponding RSRP2 and RRU3, it is the maximum in three RSRP due to RSRP2, so originally A groups RRU includes RRU2, B groups RRU includes RRU1 and RRU3, and RSRP2 and the ratio of RSRP1 and RSRP3 sums are more than decision threshold, that is, meet judgment condition.So final A groups RRU includes RRU2, B groups RRU includes RRU1 and RRU3.Only include RRU2, i.e. only one of which RRU in A groups RRU (work RRU set), the RRU2 is the first RRU, so the UE4 is independent scheduling UE, the RRU1 and RRU3 in the B groups are the 2nd RRU.
It should be understood that, depending on predetermined threshold value can be according to actual conditions, the predetermined threshold value can also be the numerical value pre-set, for example, the value of predetermined threshold value can be 1, the embodiment of the present invention is not limited to this, in embodiments of the present invention, A groups RRU RSRP can also be made comparisons with the size of B groups RRU RSRP sums, if A groups RRU RSRP is less than B groups RRU RSRP sums, then strong RSRP times RRU is changed to A groups from B groups, until A groups RRU RSRP sums are more than B groups RRU RSRP sums.
Alternatively, as another embodiment, in 220, position is launched according to different signals the first CSI-RS and the first DMRS is sent on the first running time-frequency resource by the first RRU, the 2nd CSI-RS and the 2nd DMRS is sent on the second running time-frequency resource by the 2nd RRU；Or according to scrambler sequence number (Number Scrambling Code sequence Identification, NSCID difference), first CSI-RS and the first DMRS is sent on the first running time-frequency resource by the first RRU, the 2nd CSI-RS and the 2nd DMRS is sent on the second running time-frequency resource by the 2nd RRU.
In other words, the embodiment of the present invention can be carried out data transmission using TM9 technologies.Specifically, different CSI-RS and DMRS resources are distributed in base station based on each RRU, and UE carries out channel measurement using CSI-RS, and is demodulated data using DMRS.
Further, as another embodiment, in 220 when NSCID values are 0, the first CSI-RS and the first DMRS is sent on the first running time-frequency resource by the first RRU, when NSCID values are 1, the 2nd CSI-RS and the 2nd DMRS is sent on the second running time-frequency resource by the 2nd RRU.
Specifically, base station can distribute different CSI-RS and DMRS resources on different RRU, so that user equipment is used to distinguish the signal that different RRU are sent out.Different RRU can be made a distinction by different transmitting positions or NSCID, for example, NSCID can represent different DMRS by value 0 or 1.For example, when NSCID values are 0 the first RRU of correspondence, base station is that the first RRU distributes the first CSI-RS and the first DMRS resources, and the 2nd RRU of correspondence when NSCID values are 1, base station is that the 2nd RRU distributes the 2nd CSI-RS and the 2nd DMRS resources.
Alternatively, as another embodiment, multiple RRU in the embodiment of the present invention can include two RRU, wherein, the first RUU and the 2nd RRU include a RRU respectively.
Certainly, multiple RRU that the embodiment of the present invention is not limited in the situation of two RRU cells, the embodiment of the present invention can also include more than two RRU situation, for example, multiple RRU can include 3,5,10 RRU etc..The embodiment of the present invention is not limited to this.
Above, the schematic flow diagram of the method for data transfer according to embodiments of the present invention is described with reference to Fig. 1 and 2.The method for data transfer of the embodiment of the present invention is described in detail with reference to Fig. 3 specific examples.
Fig. 3 is the schematic flow diagram of the method according to another embodiment of the present invention for data transfer.As shown in figure 3, this method is performed by base station, this method includes：
310, UEs of multiple RRU into cell multiple RSRP are determined, wherein, each RRU that multiple RSRP are included in multiple RRU reaches UE RSRP.
Specifically, base station can be measured according to multiple uplink reference signals, obtain UE to multiple RRU RSRP；Multiple RRU to UE multiple RSRP are determined according to UE to multiple RRU RSRP.Wherein, uplink reference signals can be SRS.
320, determine A group RRU and B groups RRU.
Specifically, base station arranges descending equivalent RSRP descendings.Base station determines that work RRU gathers by calculating isolation, specifically, and equivalent RSRP most strong RRU are determined as the A groups RRU of the UE by base station；Remaining RRU is defined as B group RRU, afterwards, base station calculates A groups RRU RSRP With the ratio of B groups RRU RSRP sums, the ratio is isolation；Afterwards, isolation is compared by base station with predetermined threshold value (decision threshold), if isolation is less than decision threshold, strong RSRP times RRU is changed to A groups from B groups, isolation is then calculated again, and compared with decision threshold.Regular according to this, untill isolation is more than decision threshold, then the A groups RRU for meeting this condition is also referred to as the work RRU set of the UE.
It should be understood that, depending on predetermined threshold value can be according to actual conditions, the predetermined threshold value can also be the numerical value pre-set, for example, the value of predetermined threshold value can be 1, the embodiment of the present invention is not limited to this, in embodiments of the present invention, A groups RRU RSRP can also be made comparisons with the size of B groups RRU RSRP sums, if A groups RRU RSRP is less than B groups RRU RSRP sums, then strong RSRP times RRU is changed to A groups from B groups, until A groups RRU RSRP sums are more than B groups RRU RSRP sums.
For example, three RSRP of three RRU to UE4 in Fig. 1 scenes, including the corresponding RSRP3 of the corresponding RSRP2 and RRU3 of RRU1 corresponding RSRP1, RRU2, it is the maximum in three RSRP due to RSRP2, so originally A groups RRU includes RRU2, B groups RRU includes RRU1 and RRU3, and RSRP2 and the ratio of RSRP1 and RSRP3 sums are more than decision threshold, that is, meet judgment condition.So final A groups RRU includes RRU2, B groups RRU includes RRU1 and RRU3.
330, determine the first RRU and the 2nd RRU.
Base station determines UE attribute according to RRU numbers in work RRU set.If containing only a RRU in UE work RRU set, the UE is independent scheduling user's set, wherein, a RRU is the first RRU, and the RRU in the B groups is the 2nd RRU.If there are multiple RRU in UE work RRU set, the UE is combined dispatching user equipment.
For example, only including RRU2, i.e. only one of which RRU in the UE4 in correspondence 320, A groups RRU (work RRU set), the RRU2 is the first RRU, and the RRU1 and RRU3 in the B groups are the 2nd RRU.
340, first channel state information reference signals CSI-RS and the first demodulated reference signal DMRS are sent on the first running time-frequency resource by the first RRU, second channel state information reference signals CSI-RS and the second demodulated reference signal DMRS are sent on the second running time-frequency resource by the 2nd RRU, first CSI-RS is used for the independent UE that dispatches and carries out channel measurement, and the first DMRS is used for the independent UE that dispatches and is demodulated data.
Therefore, the embodiment of the present invention is dispatched by the user equipment (UE) for determining to be located in cell to be independent UE, and the first channel state information reference signals CSI-RS and the first demodulated reference signal DMRS are sent on the first running time-frequency resource by the first RRU, second channel state information reference signals CSI-RS and the second demodulated reference signal DMRS are sent on the second running time-frequency resource by the 2nd RRU, first CSI-RS is used for the independent UE that dispatches and carries out channel measurement, first DMRS is used for the independent UE that dispatches and is demodulated data, the embodiment of the present invention can send reference signal by different RRU in different resources, independent scheduling user's set can be made to distinguish the reference signal that different RRU are sent, the throughput of user equipment can be lifted.
Above, the method for data transfer of the embodiment of the present invention is described in detail with reference to Fig. 1 to Fig. 3, the base station of the embodiment of the present invention is described in detail below in conjunction with Fig. 4 and Fig. 5.
Fig. 4 is base station according to an embodiment of the invention, and Fig. 4 base station 400 includes：Determining unit 410 and transmitting element 420.
Specifically, it is determined that unit 410 is used to determine that the user equipment (UE) being located in cell is independent scheduling UE, wherein, independent scheduling UE is represented in the coverage for the first RRU that UE is only located in multiple RRU；Transmitting element 420 is used to send the first channel state information reference signals CSI-RS and the first demodulated reference signal DMRS on the first running time-frequency resource by the first RRU, second channel state information reference signals CSI-RS and the second demodulated reference signal DMRS are sent on the second running time-frequency resource by the 2nd RRU, first CSI-RS is used for the independent UE that dispatches and carries out channel measurement, first DMRS is used for the independent UE that dispatches and is demodulated data, wherein, the 2nd RRU includes the RRU in addition to the first RRU in multiple RRU.
Therefore, the embodiment of the present invention is independent scheduling UE by the user equipment (UE) for determining to be located in cell, and the first channel state information reference signals CSI-RS and the first demodulated reference signal DMRS are sent on the first running time-frequency resource by the first RRU, second channel state information reference signals CSI-RS and the second demodulated reference signal DMRS are sent on the second running time-frequency resource by the 2nd RRU, first CSI-RS is used for the independent UE that dispatches and carries out channel measurement, first DMRS is used for the independent UE that dispatches and is demodulated data, the embodiment of the present invention can send reference signal by different RRU in different resources, independent scheduling user's set can be made to distinguish the reference signal that different RRU are sent, the throughput of user equipment can be lifted.
Alternatively, as another embodiment, UE of the determining unit 410 according to multiple RRU into cell multiple RSRP determine that UE is independent scheduling UE.
Alternatively, as another embodiment, determining unit 410 determines that multiple RRU reach UE multiple RSRP, wherein, each RRU that multiple RSRP are included in multiple RRU reaches UE RSRP； Determine that the RRU in the first RRU that the corresponding RRU of maximum RSRP in multiple RSRP are UE, multiple RRU in addition to the first RRU is the 2nd RRU；When the ratio of the RSRP sums of all RRU in the first RRU RSRP and the 2nd RRU is more than predetermined threshold value, it is independent scheduling UE to determine UE.
Alternatively, as another embodiment, the base station also includes receiving unit, multiple uplink reference signals of the multiple RRU of correspondence for receiving UE transmissions, wherein, multiple uplink reference signals include the uplink reference signals of each RRU in the multiple RRU of correspondence；Wherein it is determined that unit 410 is measured according to multiple uplink reference signals, UE to multiple RRU RSRP is obtained；Multiple RRU to UE multiple RSRP are determined according to UE to multiple RRU RSRP.
Alternatively, it is used as another embodiment, transmitting element 420 launches position according to different signals and the first CSI-RS and the first DMRS is sent on the first running time-frequency resource by the first RRU, 2nd CSI-RS and the 2nd DMRS is sent on the second running time-frequency resource by the 2nd RRU, or according to NSCID difference, first CSI-RS and the first DMRS is sent on the first running time-frequency resource by the first RRU, the 2nd CSI-RS and the 2nd DMRS is sent on the second running time-frequency resource by the 2nd RRU.
Alternatively, it is used as another embodiment, when NSCID values are 0, transmitting element 420 sends the first CSI-RS and the first DMRS by the first RRU on the first running time-frequency resource, when NSCID values are 1, transmitting element 420 sends the 2nd CSI-RS and the 2nd DMRS by the 2nd RRU on the second running time-frequency resource.
It should be understood that Fig. 4 base station can realize that Fig. 2 is related to each process of base station into Fig. 3 methods, to avoid repeating, no longer it is described in detail herein.
Fig. 5 is base station according to another embodiment of the present invention, as shown in figure 5, the base station 500 includes processor 510, memory 520, bus system 530 and transceiver 540.
Specifically, processor 510 calls the code being stored in memory 520 by bus system 530, it is determined that the user equipment (UE) in cell is independent scheduling UE, wherein, independent scheduling UE is represented in the coverage for the first RRU that UE is only located in multiple RRU；Transceiver 540 sends the first channel state information reference signals CSI-RS and the first demodulated reference signal DMRS by the first RRU on the first running time-frequency resource, second channel state information reference signals CSI-RS and the second demodulated reference signal DMRS are sent on the second running time-frequency resource by the 2nd RRU, first CSI-RS is used for the independent UE that dispatches and carries out channel measurement, first DMRS is used for the independent UE that dispatches and is demodulated data, wherein, the 2nd RRU includes the RRU in addition to the first RRU in multiple RRU.
Therefore, the embodiment of the present invention is dispatched by the user equipment (UE) for determining to be located in cell to be independent UE, and the first channel state information reference signals CSI-RS and the first demodulated reference signal DMRS are sent on the first running time-frequency resource by the first RRU, second channel state information reference signals CSI-RS and the second demodulated reference signal DMRS are sent on the second running time-frequency resource by the 2nd RRU, first CSI-RS is used for the independent UE that dispatches and carries out channel measurement, first DMRS is used for the independent UE that dispatches and is demodulated data, the embodiment of the present invention can send reference signal by different RRU in different resources, independent scheduling user's set can be made to distinguish the reference signal that different RRU are sent, the throughput of user equipment can be lifted.
The method that the embodiments of the present invention are disclosed can apply in processor 510, or be realized by processor 510.Processor 510 is probably a kind of IC chip, the disposal ability with signal.In implementation process, each step of the above method can be completed by the integrated logic circuit of the hardware in processor 510 or the instruction of software form.Above-mentioned processor 510 can be general processor, digital signal processor (English Digital Signal Processor, abbreviation DSP), application specific integrated circuit (English Application Specific Integrated Circuit, abbreviation ASIC), ready-made programmable gate array (English Field Programmable Gate Array, abbreviation FPGA) or other PLDs, discrete gate or transistor logic, discrete hardware components.It can realize or perform disclosed each method, step and the logic diagram in the embodiment of the present invention.General processor can be microprocessor or the processor can also be any conventional processor etc..The step of method with reference to disclosed in the embodiment of the present invention, can be embodied directly in hardware decoding processor and perform completion, or perform completion with the hardware in decoding processor and software module combination.Software module can be located at random access memory (English Random Access Memory, abbreviation RAM), flash memory, read-only storage (English Read-Only Memory, abbreviation ROM), in the ripe storage medium in this area such as programmable read only memory or electrically erasable programmable memory, register.The storage medium is located at memory 520, processor 510 reads the information in memory 520, the step of completing the above method with reference to its hardware, the bus system 530 can also include power bus, controlling bus and status signal bus in addition etc. in addition to including data/address bus.But for the sake of clear explanation, various buses are all designated as bus system 530 in figure.
Alternatively, as another embodiment, UE of the processor 510 according to multiple RRU into cell multiple RSRP determine that UE is independent scheduling UE.
Alternatively, as another embodiment, processor 510 determines that multiple RRU reach UE multiple RSRP, wherein, each RRU that multiple RSRP are included in multiple RRU reaches UE RSRP；Determine that the RRU in the first RRU that the corresponding RRU of maximum RSRP in multiple RSRP are UE, multiple RRU in addition to the first RRU is the 2nd RRU；As the first RRU RSRP and the 2nd RRU In all RRU ratio of RSRP sums when being more than predetermined threshold value, it is independent scheduling UE to determine UE.
Alternatively, as another embodiment, transceiver 540 is used for the multiple uplink reference signals for receiving the multiple RRU of correspondence of UE transmissions, wherein, multiple uplink reference signals include the uplink reference signals of each RRU in the multiple RRU of correspondence；Processor 510 is measured according to multiple uplink reference signals, obtains UE to multiple RRU RSRP, multiple RRU to UE multiple RSRP are determined according to UE to multiple RRU RSRP.
Alternatively, it is used as another embodiment, transceiver 540 launches position according to different signals and the first CSI-RS and the first DMRS is sent on the first running time-frequency resource by the first RRU, 2nd CSI-RS and the 2nd DMRS is sent on the second running time-frequency resource by the 2nd RRU, or transceiver 540 is according to NSCID difference, first CSI-RS and the first DMRS is sent on the first running time-frequency resource by the first RRU, the 2nd CSI-RS and the 2nd DMRS is sent on the second running time-frequency resource by the 2nd RRU.
Alternatively, as another embodiment, when NSCID values are 0, transceiver 540 sends the first CSI-RS and the first DMRS by the first RRU on the first running time-frequency resource, when NSCID values are 1, transceiver 540 sends the 2nd CSI-RS and the 2nd DMRS by the 2nd RRU on the second running time-frequency resource.
It should be understood that Fig. 5 base station can realize that Fig. 2 is related to each process of base station into Fig. 3 methods, to avoid repeating, no longer it is described in detail herein.
It should be noted that above-mentioned example, which is to aid in those skilled in the art, more fully understands the embodiment of the present invention, and the scope of the embodiment of the present invention have to be limited.Those skilled in the art are according to given above-mentioned example, it is clear that can carry out various modifications or change of equal value, and such modification or change are also fallen into the range of the embodiment of the present invention.
It should be understood that the size of the sequence number of above-mentioned each process is not meant to the priority of execution sequence, the execution sequence of each process should be determined with its function and internal logic, and any limit is constituted without tackling the implementation process of the embodiment of the present invention.
It should be understood that during " one embodiment " or " embodiment " that specification is mentioned in the whole text means that the special characteristic relevant with embodiment, structure or characteristic are included at least one embodiment of the present invention.Therefore, " in one embodiment " or " in one embodiment " occurred everywhere in entire disclosure not necessarily refers to identical embodiment.In addition, these specific feature, structure or characteristics can be combined in one or more embodiments in any suitable manner.It should be understood that in various embodiments of the present invention, the size of the sequence number of above-mentioned each process is not meant to the priority of execution sequence, the execution sequence Ying Yiqi of each process Function and internal logic are determined, any limit is constituted without tackling the implementation process of the embodiment of the present invention.
In addition, the terms " system " and " network " are often used interchangeably herein.The terms "and/or", only a kind of incidence relation for describing affiliated partner, represents there may be three kinds of relations, for example, A and/or B, can be represented：Individualism A, while there is A and B, these three situations of individualism B.In addition, character "/" herein, it is a kind of relation of "or" to typically represent forward-backward correlation object.
It should be understood that in embodiments of the present invention, " B " corresponding with A represents that B is associated with A, and B can be determined according to A.It is also to be understood that determining that B is not meant to determine B only according to A according to A, B can also be determined according to A and/or other information.
Those of ordinary skill in the art can be appreciated that, the unit and algorithm steps of each example described with reference to the embodiments described herein, it can be realized with electronic hardware, computer software or the combination of the two, in order to clearly demonstrate the interchangeability of hardware and software, the composition and step of each example are generally described according to function in the above description.These functions are performed with hardware or software mode actually, depending on the application-specific and design constraint of technical scheme.Professional and technical personnel can realize described function to each specific application using distinct methods, but this realization is it is not considered that beyond the scope of this invention.
It is apparent to those skilled in the art that, for convenience of description and succinctly, the specific work process of the system of foregoing description, device and unit may be referred to the corresponding process in preceding method embodiment, will not be repeated here.
In several embodiments provided herein, it should be understood that disclosed systems, devices and methods, it can realize by another way.For example, device embodiment described above is only schematical, for example, the division of unit, it is only a kind of division of logic function, there can be other dividing mode when actually realizing, such as multiple units or component can combine or be desirably integrated into another system, or some features can be ignored, or do not perform.In addition, shown or discussed coupling or direct-coupling or communication connection each other can be by the INDIRECT COUPLING of some interfaces, device or unit or communication connection or electricity, mechanical or other forms are connected.
The unit illustrated as separating component can be or may not be physically separate, and the part shown as unit can be or may not be physical location, you can with positioned at a place, or can also be distributed on multiple NEs.Some or all of unit therein can be selected to realize the purpose of scheme of the embodiment of the present invention according to the actual needs.
In addition, each functional unit in each embodiment of the invention can be integrated in a processing unit In or unit is individually physically present or two or more units are integrated in a unit.Above-mentioned integrated unit can both be realized in the form of hardware, it would however also be possible to employ the form of SFU software functional unit is realized.
Through the above description of the embodiments, it is apparent to those skilled in the art that the present invention can be realized with hardware, or firmware is realized, or combinations thereof mode is realized.When implemented in software, above-mentioned functions can be stored in computer-readable medium or be transmitted as one or more instructions on computer-readable medium or code.Computer-readable medium includes computer-readable storage medium and communication media, and wherein communication media includes being easy to any medium that computer program is transmitted from a place to another place.Storage medium can be any usable medium that computer can be accessed.As example but it is not limited to：Computer-readable medium can include RAM, ROM, EEPROM, CD-ROM or other optical disc storages, magnetic disk storage medium or other magnetic storage apparatus or can be used in carrying or store with instruct or data structure form desired program code and can by computer access any other medium.In addition.Any connection can be suitably turn into computer-readable medium.For example, if software is to be transmitted using coaxial cable, optical fiber cable, twisted-pair feeder, Digital Subscriber Line (DSL) or such as wireless technology of infrared ray, radio and microwave etc from website, server or other remote sources, then the wireless technology of coaxial cable, optical fiber cable, twisted-pair feeder, DSL or such as infrared ray, wireless and microwave etc be included in belonging to medium it is fixing in.As used in the present invention, disk (Disk) and dish (disc) include compression laser disc (CD), laser disc, laser disc, Digital Versatile Disc (DVD), floppy disk and Blu-ray Disc, the replicate data of the usual magnetic of which disk, and dish is then with laser come optical replicate data.Above combination above should also be as being included within the protection domain of computer-readable medium.
In a word, the preferred embodiment of technical solution of the present invention is these are only, is not intended to limit the scope of the present invention.Within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection.

Claims (12)

  1. A kind of method for data transfer, it is characterised in that applied in multiple radio frequency remote unit RRUs altogether cell, methods described includes：
    It is determined that the user equipment (UE) in the cell is independent scheduling UE, wherein, the independent scheduling UE is represented in the coverage for the first RRU that the UE is only located in the multiple RRU；
    First channel state information reference signals CSI-RS and the first demodulated reference signal DMRS are sent on the first running time-frequency resource by the first RRU, second channel state information reference signals CSI-RS and the second demodulated reference signal DMRS are sent on the second running time-frequency resource by the 2nd RRU, first CSI-RS is used for the independent scheduling UE and carries out channel measurement, first DMRS is used for the independent scheduling UE and is demodulated data, wherein, the 2nd RRU includes the RRU in addition to the first RRU in the multiple RRU.
  2. According to the method described in claim 1, it is characterised in that the user equipment (UE) for determining to be located in the cell is independent scheduling UE, including：
    Determine that the UE is independent scheduling UE according to the multiple RRU to the UE in the cell multiple reference signal receiving intensity RSRP.
  3. Method according to claim 2, it is characterised in that multiple reference signal receiving intensity RSRP according to the multiple RRU to the UE in the cell determine that the UE is independent scheduling UE, including：
    Determine that the multiple RRU reaches multiple RSRP of the UE, wherein, each RRU that the multiple RSRP is included in the multiple RRU reaches the RSRP of the UE；
    Determine that the RRU in the first RRU that the corresponding RRU of maximum RSRP in the multiple RSRP are the UE, the multiple RRU in addition to the first RRU is the 2nd RRU；
    When the ratio of the RSRP sums of all RRU in the RSRP and the 2nd RRU of the first RRU is more than predetermined threshold value, it is independent scheduling UE to determine the UE.
  4. Method according to claim 3, it is characterised in that methods described also includes：
    The multiple uplink reference signals for the multiple RRU of correspondence that the UE is sent are received, wherein, the multiple uplink reference signals include the uplink reference signals of each RRU in the multiple RRU of correspondence,
    Wherein, the multiple RSRP for determining the multiple RRU to the UE, including：
    Measured according to the multiple uplink reference signals, obtain the RSRP of the UE to the multiple RRU；
    The multiple RRU to the UE multiple RSRP are determined according to the UE to the multiple RRU RSRP.
  5. Method according to any one of claim 1 to 4, it is characterised in that
    It is described that first channel state information reference signals CSI-RS and the first demodulated reference signal DMRS are sent on the first running time-frequency resource by the first RRU, second channel state information reference signals CSI-RS and the second demodulated reference signal DMRS are sent on the second running time-frequency resource by the 2nd RRU
    Including：
    Position is launched according to different signals the first CSI-RS and the first DMRS is sent on the first running time-frequency resource by the first RRU, the 2nd CSI-RS and the 2nd DMRS is sent on the second running time-frequency resource by the 2nd RRU,
    Or
    According to scrambler sequence NSCID difference, the first CSI-RS and the first DMRS is sent on the first running time-frequency resource by the first RRU, the 2nd CSI-RS and the 2nd DMRS is sent on the second running time-frequency resource by the 2nd RRU.
  6. Method according to claim 5, it is characterised in that
    The difference according to NSCID, the first CSI-RS and the first DMRS is sent by the first RRU on the first running time-frequency resource, and the 2nd CSI-RS and the 2nd DMRS is sent on the second running time-frequency resource by the 2nd RRU, including：
    When NSCID values are 0, the first CSI-RS and the first DMRS is sent on the first running time-frequency resource by the first RRU,
    When NSCID values are 1, the 2nd CSI-RS and the 2nd DMRS is sent on the second running time-frequency resource by the 2nd RRU.
  7. A kind of base station, it is characterised in that including：
    Determining unit, the user equipment (UE) for determining to be located in the cell is independent scheduling UE, wherein, the independent scheduling UE is represented in the coverage for the first RRU that the UE is only located in the multiple RRU；
    Transmitting element, for sending the first channel state information reference signals CSI-RS and the first demodulated reference signal DMRS on the first running time-frequency resource by the first RRU, second channel state information reference signals CSI-RS and the second demodulated reference signal DMRS are sent on the second running time-frequency resource by the 2nd RRU, first CSI-RS is used for the independent scheduling UE and carries out channel measurement, first DMRS is used for the independent scheduling UE and is demodulated data, wherein, the 2nd RRU includes RRU in the multiple RRU in addition to the first RRU.
  8. Base station according to claim 7, it is characterised in that
    The determining unit determines that the UE is independent scheduling UE according to the multiple RRU to the UE in the cell multiple RSRP.
  9. Base station according to claim 8, it is characterised in that
    The determining unit determines that the multiple RRU reaches multiple RSRP of the UE, wherein, each RRU that the multiple RSRP is included in the multiple RRU reaches the RSRP of the UE；Determine that the RRU in the first RRU that the corresponding RRU of maximum RSRP in the multiple RSRP are the UE, the multiple RRU in addition to the first RRU is the 2nd RRU；When the ratio of the RSRP sums of all RRU in the RSRP and the 2nd RRU of the first RRU is more than predetermined threshold value, it is independent scheduling UE to determine the UE.
  10. Base station according to claim 9, it is characterised in that also include：
    Receiving unit, multiple uplink reference signals for receiving the multiple RRU of correspondence that the UE is sent, wherein, the multiple uplink reference signals include the uplink reference signals of each RRU in the multiple RRU of correspondence,
    Wherein, the determining unit is measured according to the multiple uplink reference signals, obtains the RSRP of the UE to the multiple RRU, the multiple RRU to the UE multiple RSRP are determined according to the UE to the multiple RRU RSRP.
  11. Base station according to any one of claim 7 to 10, it is characterised in that
    The transmitting element launches position according to different signals and the first CSI-RS and the first DMRS is sent on the first running time-frequency resource by the first RRU, and the 2nd CSI-RS and the 2nd DMRS is sent on the second running time-frequency resource by the 2nd RRU,
    Or according to NSCID difference, the first CSI-RS and the first DMRS is sent on the first running time-frequency resource by the first RRU, the 2nd CSI-RS and the 2nd DMRS is sent on the second running time-frequency resource by the 2nd RRU.
  12. Base station according to claim 11, it is characterised in that
    When NSCID values are 0, the transmitting element sends the first CSI-RS and the first DMRS by the first RRU on the first running time-frequency resource,
    When NSCID values are 1, the transmitting element sends the 2nd CSI-RS and the 2nd DMRS by the 2nd RRU on the second running time-frequency resource.
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