WO2016062074A1 - 一种小区上行协作的方法和基站 - Google Patents

一种小区上行协作的方法和基站 Download PDF

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Publication number
WO2016062074A1
WO2016062074A1 PCT/CN2015/078976 CN2015078976W WO2016062074A1 WO 2016062074 A1 WO2016062074 A1 WO 2016062074A1 CN 2015078976 W CN2015078976 W CN 2015078976W WO 2016062074 A1 WO2016062074 A1 WO 2016062074A1
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WIPO (PCT)
Prior art keywords
base station
demodulation
uplink data
decoding
data
Prior art date
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PCT/CN2015/078976
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English (en)
French (fr)
Inventor
陈拓
楼群芳
邵潇杰
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP15853389.3A priority Critical patent/EP3203789B1/en
Publication of WO2016062074A1 publication Critical patent/WO2016062074A1/zh
Priority to US15/494,129 priority patent/US10148323B2/en

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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
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1835—Buffer management
    • H04L1/1845—Combining techniques, e.g. code combining
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
    • 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
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1864—ARQ related signaling
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and a base station for cell uplink cooperation.
  • Coordinated Multiple Points utilizes multiple sectors or multiple base stations in a base station to jointly receive and demodulate uplink data of user equipment (User Equipment, UE) to improve edge
  • the coverage performance of the UE improves the uplink rate of the UE.
  • the serving cell of the UE belongs to the base station 0, and the coordinated cell belongs to the base station 1 to K (K ⁇ 1).
  • the base station 0 and the base station 1 to K perform joint reception demodulation and decoding on the uplink data sent by the UE.
  • the management information (for example, the scheduling information of the accessing UE) is sent to the base stations 1 to K, and then the UE simultaneously sends the same uplink data to the base station 0 and the base stations 1 to K.
  • the base stations 1 to K forward the received uplink data to the base station 0, and the base station 0 completes the joint reception demodulation decoding of the data within the specified time T, and performs retransmission scheduling or new transmission scheduling according to the joint demodulation decoding result.
  • the base station 0 sets the time 1 in the specified time T. If the base station 0 receives the uplink data forwarded by the base station 1 to K before the time 1 , the base station 0 transmits the uplink data and the base station separately received by the base station 0. The uplink data forwarded by 1 to K is combined for joint demodulation decoding.
  • the joint receiving demodulation and decoding needs to be completed within a specified time. Due to factors such as network congestion and limited network capacity, the data interaction delay between the base stations may be long, so that the uplink data forwarded by the base stations 1 to K cannot be before the time 1 When the base station 0 arrives in time, the base station 0 does not have sufficient time for joint demodulation and decoding. At this time, the base station 0 demodulates and decodes the uplink data separately received from the UE.
  • the data retransmission rate of the UE is high, that is, the uplink data amount successfully transmitted by the UE per unit time is reduced. Thereby reducing the uplink rate of the UE.
  • the embodiments of the present invention provide a cell uplink cooperation method and a base station, which are used to solve the problem that the inter-base station interaction delay is long, and the UE uplink rate is low due to joint reception demodulation and decoding.
  • a base station including:
  • a first determining unit configured to determine whether the first uplink data sent by the user equipment UE that is forwarded by the second base station is received before the first time, the serving cell of the UE belongs to the first base station, and the UE cooperates The cell belongs to the second base station;
  • a processing unit configured to: if the first determining unit determines No, demodulate and decode the second uplink data received from the UE, and if an incorrect demodulation and decoding result is obtained, the hybrid automatic retransmission is performed. Requesting the HARQ process to hang;
  • a second determining unit configured to determine whether the first uplink data that is forwarded by the second base station is received between the first time and the second time;
  • a demodulation decoding unit configured to: if the second determining unit determines that the first uplink data is received between the first time and the second time, the second time is later than the first And performing joint demodulation and decoding on the first uplink data and the second uplink data, determining a demodulation and decoding result, or determining a demodulation and decoding result according to the first data forwarded by the second base station.
  • the first data is data that is demodulated and decoded by the second base station by using the first uplink data.
  • the method further includes:
  • An acquiring unit configured to acquire a transmission quality when the UE sends uplink data, where the uplink data includes the first uplink data and the second uplink data, where the transmission
  • the quality includes a signal to noise ratio SNR, a signal to interference and noise ratio (SINR) or a modulation and coding strategy MCS of the UE;
  • a first sending unit configured to send an indication signal to the UE according to the transmission quality acquired by the acquiring unit, where the indication signal is used to enable the UE to enter a time slot binding TTI Bundling state to send the uplink data.
  • the processing unit is specifically configured to:
  • the demodulation and decoding unit is specifically configured to:
  • demodulation and decoding If the demodulation and decoding is correct, it is determined that the demodulation and decoding result is correct; if the demodulation and decoding is incorrect, it is determined that the demodulation and decoding result is incorrect.
  • the first data includes the second base station Demodulating and decoding the data bits and result indication information of the uplink data
  • the demodulation and decoding unit is specifically configured to:
  • the second base station demodulates and decodes the first uplink data correctly, and the result indication information indicates that the demodulation and decoding is correct, determining that the demodulation and decoding result is correct;
  • the second base station demodulates and decodes the first uplink data, and the result indication information indicates a demodulation decoding error, determining that the demodulation decoding result is an error.
  • the method further includes:
  • a second sending unit configured to: after the second time, the first base station determines that the demodulation and decoding result is incorrect, send retransmission indication information to the UE, where the retransmission indication information is used Instructing the UE to retransmit the uplink data;
  • the first base station determines that the demodulation and decoding result is correct, and sends the new transmission indication information to the UE.
  • a method for uplink cooperation of a cell including:
  • the first base station determines whether the first uplink data sent by the user equipment UE that is forwarded by the second base station is received before the first time, the serving cell of the UE belongs to the first base station, and the coordinated cell of the UE belongs to the Said second base station;
  • the first base station demodulates and decodes the second uplink data received from the UE, and if an incorrect demodulation and decoding result is obtained, the first base station will perform a hybrid automatic repeat request.
  • the HARQ process is suspended, and determining whether the first uplink data forwarded by the second base station is received between the first time and the second time;
  • the first base station compares the first uplink data. Performing joint demodulation decoding with the second uplink data, and determining a demodulation decoding result, or determining, by the first base station, a demodulation decoding result according to the first data forwarded by the second base station, where the first The data is data obtained by demodulating and decoding the first uplink data by the second base station.
  • the method further includes:
  • the first base station acquires a transmission quality when the UE sends uplink data, where the uplink data includes the first uplink data and the second uplink data, where the transmission quality includes a signal to noise ratio SNR of the UE, Signal to interference and noise ratio SINR or modulation and coding strategy MCS;
  • the first base station sends an indication signal to the UE according to the transmission quality, where the indication signal is used to enable the UE to enter a time slot binding TTI Bundling state to send the uplink data.
  • the first base station suspending the hybrid automatic repeat request HARQ process includes:
  • the first base station sends an acknowledgment signal ACK to the UE, and does not send the new transmission indication information of the HARQ process to the UE, where the new transmission indication information is used to indicate that the UE continues to send the next uplink data.
  • the first base station is configured to the first uplink data and the The second uplink data is jointly demodulated and decoded, and the demodulation and decoding results are determined to include:
  • the first base station performs joint demodulation and decoding on the second uplink data received from the UE and the first uplink data forwarded by the second base station;
  • the first base station determines that the demodulation and decoding result is correct; if the demodulation and decoding is incorrect, the first base station determines that the demodulation and decoding result is incorrect.
  • the first data includes the second base station Demodulating and decoding the data bits and result indication information of the uplink data
  • Determining, by the first base station, the demodulation and decoding result according to the first data forwarded by the second base station includes:
  • the first base station determines that the demodulation and decoding result is correct
  • the result is The indication information indicates a demodulation decoding error, and the first base station determines that the demodulation decoding result is an error.
  • the method further includes:
  • the first base station After the second base station determines that the demodulation and decoding result is incorrect, the first base station sends retransmission indication information to the UE, where the retransmission indication information is used to indicate Retransmitting the uplink data by the UE;
  • the first base station After the second base station determines that the demodulation and decoding result is correct, the first base station sends the new transmission indication information to the UE.
  • a cell uplink cooperation method and a base station are provided by the embodiment of the present invention.
  • the serving cell of the UE belongs to the first base station, and the coordinated cell belongs to the second base station.
  • the first base station does not receive the second base station forwarded.
  • the first uplink data, and the first base station demodulates and decodes the second uplink data received from the UE to obtain an erroneous demodulation and decoding result, suspending the hybrid automatic repeat request HARQ process, and at this time, no longer
  • the retransmission scheduling is performed as immediately as in the prior art, but the first uplink data forwarded by the second base station is received until the second time, and thus the time of the joint reception demodulation decoding is delayed by the first time in the prior art.
  • the second time in the embodiment of the present invention so that when the data exchange delay between the base stations is long, the first uplink data that is forwarded by the second base station does not arrive at the first base station before the first time, the first base station has more Time for joint reception demodulation decoding, and since the correct rate of joint reception demodulation decoding is higher than the correct rate of demodulation decoding by the first base station alone, the unit time is increased.
  • FIG. 1 is a structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 2 is a flowchart of a method for uplink cooperation of a cell according to an embodiment of the present invention
  • FIG. 3 is a flowchart of another method for uplink cooperation of a cell according to an embodiment of the present invention.
  • FIG. 4 is a flow chart of interaction between data and data of a cell uplink cooperation method according to an embodiment of the present invention
  • FIG. 5 is a structural diagram of another base station according to an embodiment of the present invention.
  • a cell uplink cooperation method provided by an embodiment of the present invention can be applied to various communication systems, such as a 2G, 3G communication system, and a next generation communication system, such as a Global System for Mobile Communications (GSM), with a lot of time.
  • GSM Global System for Mobile Communications
  • TDMA Time Division Multiple Access
  • CDMA Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • the UE which may be a wired device or a wireless device, may be, for example, a device that provides voice and/or data connectivity to the user, a handheld device with wireless connectivity, or other processing device that is coupled to the wireless modem decoder.
  • a base station can refer to a device in an access network that communicates with a wireless terminal over one or more sectors over an air interface.
  • the base station may be a base station (BTS, Base Transceiver Station) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved base station (eNBB or eNB or e- in LTE). NodeB), the invention is not limited.
  • an embodiment of the present invention provides a first base station 100, where a serving cell of a UE belongs to the first base station, and specifically includes the following parts:
  • the first determining unit 101 is configured to determine whether the first uplink data sent by the user equipment UE that is forwarded by the second base station is received before the first time, the serving cell of the UE belongs to the first base station, and the coordinated cell of the UE belongs to the second Base station.
  • the serving cell of the UE refers to a primary serving cell that provides various communication service services such as voice and data for the UE, and the coordinated cell is a neighboring cell of the primary serving cell of the UE, and is used to exchange uplinks received from the UE by interacting with the primary serving cell. Data to achieve joint reception of multiple base station data.
  • the UE here transmits the same uplink data to the first base station 100 and the second base station at the same time, and the second base station may have one or more to improve the uplink rate of the UE.
  • the processing unit 102 is configured to: if the first determining unit 101 determines No, perform demodulation and decoding on the second uplink data received from the UE, and if an erroneous demodulation and decoding result is obtained, the hybrid automatic repeat request is obtained ( Hybrid Automatic Repeat Request, HARQ) process hangs.
  • the demodulation decoding includes a process in which the base station recovers the original data information after receiving a series of processing operations such as down-conversion, descrambling, and decoding from receiving the uplink data of the UE.
  • the hybrid automatic repeat request HARQ process is used to perform retransmission scheduling immediately when demodulation and decoding obtains an error result. If the process is suspended, retransmission scheduling is prohibited immediately, and the UE maintains the current state without transmitting. Upstream data, until the first base station 100 sends (UpLink Grant, UL-Grant) uplink grant indication information to the UE, and the UE performs data retransmission or new transmission.
  • UpLink Grant UpLink Grant, UL-Grant
  • the processing unit 102 may be specifically configured to send an acknowledgment signal to the UE. (Acknowledgement, ACK), does not send the new transmission indication information of the above HARQ process to the UE to suspend the automatic retransmission request HARQ process.
  • the new transmission indication information is used to indicate that the UE continues to send the next uplink data.
  • the second determining unit 103 is configured to determine whether the first uplink data forwarded by the second base station is received between the first time and the second time.
  • the demodulation and decoding unit 104 is configured to: if the second determining unit 103 determines that the first uplink data is received between the first time and the second time, and the second time is later than the first time, the first uplink data and the first The second uplink data is jointly demodulated and decoded, and the demodulation decoding result is determined, or the demodulation decoding result is determined according to the first data forwarded by the second base station, and the first data is used by the second base station to demodulate the first uplink data. Decoded data.
  • the demodulation decoding unit 104 is configured to receive the second received from the UE.
  • the uplink data and the first uplink data forwarded by the second base station are jointly demodulated and decoded, and the demodulation decoding result is determined.
  • the demodulation and decoding unit 104 may be specifically configured to jointly demodulate and decode the second uplink data received from the UE and the first uplink data forwarded by the second base station;
  • the demodulation and decoding is correct, it is determined that the demodulation and decoding result is correct; if the demodulation and decoding is incorrect, the demodulation and decoding result is determined to be incorrect.
  • the first data may include data bits and result indication information that are demodulated and decoded by the second base station by using the first uplink data;
  • the demodulation decoding unit 104 can be specifically used to:
  • the second base station demodulates and decodes the first uplink data correctly, and the result indication information indicates that the demodulation and decoding is correct, it is determined that the demodulation and decoding result is correct;
  • the second base station demodulates and decodes the first uplink data, and the result indication information indicates a demodulation decoding error, it determines that the demodulation decoding result is incorrect.
  • the manner in which the demodulation and decoding unit 104 is used to determine whether the demodulation and decoding result is correct may be various.
  • the check code obtained by demodulating and decoding the uplink data of the UE may be verified by the check code carried in the uplink data of the UE. If the code is the same as the check code carried in the uplink data of the UE, the flag position may be set to 1, indicating that the demodulation and decoding result is correct; Different from the check code carried in the uplink data of the UE, the flag position may be set to 0 to indicate that the demodulation decoding result is incorrect.
  • the acquiring unit 105 is further configured to acquire the transmission quality when the UE sends the uplink data.
  • the uplink data herein includes the first uplink data and the second uplink data, and the transmission quality may include a signal to noise ratio (Signal/Noise, SNR), a signal to interference and noise ratio (SINR), or a modulation ratio of the UE.
  • SNR signal to noise ratio
  • SINR signal to interference and noise ratio
  • MCS Modulation and Coding Scheme
  • MCS Modulation and Coding Scheme
  • the first sending unit 106 is further configured to send, according to the transmission quality acquired by the obtaining unit 105, an indication signal, where the indication signal is used to enable the UE to enter a time slot binding TTI Bundling state to send uplink data, where The base station 100 and the second base station receive uplink data sent by the UE in the TTI Bundling state.
  • a sending unit 106 may be configured to instruct the UE to send uplink data in a Transmission Time Interval Bundling (TTI Bundling) state to improve the uplink data amount successfully transmitted by the UE.
  • TTI Bundling Transmission Time Interval Bundling
  • the MCS may indicate the data transmission rate of the UE in the current modem decoding mode. Therefore, when the transmission rate is lower than a certain threshold, the first sending unit 106 may be configured to send an indication signal to the UE to indicate the UE. Enter the TTI Bundling state to send uplink data.
  • the second sending unit 107 is further configured to: if the first base station 100 determines that the demodulation and decoding result is incorrect after the second time, send retransmission indication information to the UE, where the retransmission indication information is used to indicate The UE retransmits the uplink data;
  • the new transmission indication information is sent to the UE.
  • the serving cell of the UE belongs to the first base station 100, and the coordinated cell belongs to the second base station.
  • the first base station 100 does not receive the first uplink data forwarded by the second base station, and
  • the first base station 100 demodulates and decodes the second uplink data received from the UE to obtain an erroneous demodulation and decoding result
  • the first base station 100 mixes The automatic retransmission request HARQ process is suspended.
  • the retransmission scheduling is not performed immediately as in the prior art, but the first uplink data forwarded by the second base station is received until the second time, and thus the joint receiving demodulation decoding is performed.
  • the time is delayed from the first time in the prior art to the second time in the embodiment of the present invention, so that the first uplink data forwarded by the second base station is not at the first moment due to the long data interaction delay between the base stations.
  • the first base station 100 arrives in time, the first base station 100 has more time for joint reception demodulation decoding, and the correct rate of joint decoding and demodulation decoding is higher than that of the first base station 100. Rate, thus increasing the uplink data volume of the UE successfully transmitted in a unit time, improving the uplink rate of the UE, and solving the problem that the UE uplink rate is low due to the inability to perform joint reception demodulation and decoding due to the long data interaction delay between the base stations. The problem.
  • the embodiment of the invention provides a method for uplink cooperation of a cell. As shown in FIG. 2, the method may include the following steps:
  • the first base station determines whether the first uplink data sent by the user equipment UE that is forwarded by the second base station is received before the first time.
  • the serving cell of the UE belongs to the first base station, and the coordinated cell of the UE belongs to the second base station.
  • the serving cell of the UE refers to a primary serving cell that provides various communication service services such as voice and data for the UE, and the coordinated cell is a neighboring cell of the primary serving cell of the UE, and is used to exchange uplinks received from the UE by interacting with the primary serving cell. Data to achieve joint reception of multiple base station data.
  • the UE here transmits the same uplink data to the first base station and the second base station at the same time, and the second base station may have one or more to improve the uplink rate of the UE.
  • the first base station determines No, the first base station demodulates and decodes the second uplink data received from the UE, and if an incorrect demodulation and decoding result is obtained, the first base station performs a hybrid automatic repeat request HARQ. The process hangs and determines whether the first uplink data forwarded by the second base station is received between the first time and the second time.
  • the demodulation decoding includes a process in which the base station recovers the original data information after receiving a series of processing operations such as down-conversion, descrambling, and decoding from receiving the uplink data of the UE.
  • the hybrid automatic repeat request HARQ process is used to perform retransmission scheduling immediately when demodulation and decoding obtains an error result. If the process is suspended, retransmission scheduling is prohibited immediately, and the UE maintains the current state without transmitting. Uplink data until the first base station sends the UL-Grant indication information to the UE, and the UE performs retransmission or new transmission of the data.
  • the first base station when the first base station does not receive the first uplink data sent by the UE forwarded by the second base station before the first time, the first base station separately demodulates and decodes the second uplink data received from the UE, If the demodulation decoding obtains the correct demodulation and decoding result, the first base station sends an acknowledgment signal ACK and UL-Grant indication information to the UE, instructing the UE to continue transmitting the next data.
  • the first base station may wait for the scheduling of the first base station in sequence, and the first base station may send the UL-Grant indication information immediately after sending the acknowledgement signal ACK to the current UE.
  • the first base station may also send the UL-Grant indication information after sending the acknowledgment signal ACK to the current UE for a period of time; if the demodulation decoding result is erroneously demodulated and decoded, the first base station does not send the non-acknowledgement signal ( Negative Acknowledgement (NACK) signal, that is, does not trigger the UE to perform data retransmission, but still sends an ACK signal to the UE to notify the UE that the first base station has received the uplink data sent by the UE, that is, the first base station will automatically retransmit the request HARQ. The process is suspended, and the UE is prohibited from performing data retransmission immediately.
  • NACK Negative Acknowledgement
  • the UL-Grant indication information of the HARQ process is not sent to the UE to instruct the UE to send new data.
  • the UE cannot receive the data.
  • the UL-Grant indication information sent by the first base station does not perform new data transmission, that is, not only does the UE not perform data retransmission, but also does not perform new data transmission.
  • the first base station separately demodulates and decodes the second uplink data received from the UE to obtain an erroneous demodulation and decoding result, in the prior art, the first base station sends a non-acknowledgment signal NACK and UL- to the UE.
  • the Grant indicates that the information is retransmitted, or the first base station does not send any information to the UE, so that the Physical Hybrid ARQ Indicator Channel (PHICH) channel detection result of the UE is confirmed as NACK, thereby making the UE Initiating a non-adaptive retransmission for data retransmission.
  • PHICH Physical Hybrid ARQ Indicator Channel
  • the first base station suspends the automatic retransmission request HARQ process, and the The UE keeps the current state without transmitting the uplink data, and the first base station extends the first uplink data of the UE that is forwarded by the second base station to the second time, thereby extending the first uplink that the first base station waits to receive the second uplink forwarded by the second base station.
  • the time of the data that is, the first base station is provided with more time for joint reception demodulation decoding to improve the correct rate of the demodulation and decoding result, thereby improving the uplink data amount successfully transmitted by the UE per unit time, and improving the UE's Uplink rate.
  • the interval between the reception time of the uplink data and the start time of the demodulation decoding by the first base station is less than 0.5 ms, and the time of demodulation and decoding is performed. Longer, generally greater than 2ms. The time interval between the second moment and the first moment here may be 8 ms.
  • the first base station performs joint demodulation and translation on the first uplink data and the second uplink data. a code, and determining a demodulation decoding result, or the first base station determines a demodulation decoding result according to the first data forwarded by the second base station, where the first data is data that is demodulated and decoded by the second base station on the first uplink data. .
  • the first data may include data bits and result indication information after the second base station demodulates and decodes the first uplink data.
  • the first base station receives the second uplink data and the second received data from the UE.
  • the first uplink data forwarded by the two base stations is jointly demodulated and decoded, and the demodulation decoding result is determined.
  • the method for determining whether the demodulation and decoding result is correct may be different.
  • the first base station may compare the check code obtained by demodulating and decoding the uplink data of the UE with the check code carried in the uplink data of the UE, if If the check code carried in the uplink data of the UE is the same, the flag position may be set to 1 to indicate that the demodulation and decoding result is correct; if the check code carried in the uplink data of the UE is different, the flag position may be set to 0. To indicate that the demodulation decoding result is wrong.
  • the first base station performs joint demodulation and decoding on the first uplink data and the second uplink data, and determines that the demodulation and decoding result includes: if the second base station receives the UE After the first uplink data is sent, the uplink data is not demodulated and decoded, and the first base station performs joint demodulation and decoding on the second uplink data received from the UE and the first uplink data forwarded by the second base station; If the demodulation and decoding is correct, the first base station determines that the demodulation and decoding result is correct, and if the demodulation and decoding is incorrect, the first base station determines that the demodulation and decoding result is incorrect.
  • the first base station may also perform step 202.
  • the erroneous demodulation decoding result obtained in the error is updated to the correct demodulation decoding result, and the demodulation decoding result is determined to be correct.
  • determining, by the first base station, the demodulation and decoding result according to the first data forwarded by the second base station, if the second base station demodulates and decodes the first uplink data, and the result indication information indicates that the demodulation and decoding is correct The first base station determines that the demodulation and decoding result is correct; if the second base station demodulates and decodes the first uplink data, and the result indication information indicates a demodulation decoding error, the first base station determines that the demodulation decoding result is incorrect.
  • the first base station may also update the erroneous demodulation and decoding result obtained in step 202 to the correct one. Demodulate the decoded result and determine that the demodulation and decoding result is correct.
  • the UL-Grant indication information is sent to indicate that the UE performs new data transmission; if the first base station determines the demodulation and decoding result after the second time. If the error is made, the UL-Grant indication information is sent to instruct the UE to perform data retransmission.
  • the error of the demodulation and decoding result determined herein may include: performing demodulation and decoding on the second uplink data received by the first base station from the UE at the first time to obtain an erroneous demodulation and decoding result, and before the second time If the first uplink data forwarded by the second base station still does not reach the first base station, the first base station finally determines that the demodulation and decoding result is incorrect; or the first uplink data forwarded by the second base station before the second time arrives at the first base station, but the second The base station forwards the first data after demodulating and decoding the first uplink data, and the second base station demodulates and decodes the first uplink data, and the result indication information indicates a demodulation decoding error, and the first base station finally determines.
  • the first base station receives the un-demodulated decoded first uplink data forwarded by the second base station, but the first base station pair from the second base station
  • the received first uplink data and the second uplink data directly received from the UE are jointly demodulated and decoded, and still obtain an erroneous demodulation and decoding result, and the first base station finally determines the demodulation and decoding result error.
  • a cell uplink cooperation method is provided by the embodiment of the present invention.
  • the serving cell of the UE belongs to the first base station, and the coordinated cell belongs to the second base station.
  • the first base station does not receive the first forwarded by the second base station. Uplink data, and when the first base station demodulates and decodes the second uplink data received from the UE to obtain an erroneous demodulation and decoding result, the hybrid automatic repeat request HARQ process is suspended, and at this time, it is no longer present.
  • the technology performs the retransmission scheduling as soon as possible, but waits to receive the first uplink data forwarded by the second base station until the second time, and thus the time of the joint reception demodulation decoding is delayed from the first time in the prior art to the present invention.
  • the second time in the embodiment, so that the first base station has more time when the first uplink data forwarded by the second base station does not arrive at the first base station before the first time because the data interaction delay between the base stations is long.
  • the embodiment of the present invention is described by a base station eNB and a user equipment UE in an LTE system.
  • the first base station eNB is the base station 0 to which the UE serves the cell
  • the second base station eNB may be one or more of the base stations 1 to K (K ⁇ 1) to which the UE coordinated cell belongs, as shown in FIG. Can include:
  • the first eNB performs media access control (MAC) layer scheduling according to the service requirement of the UE.
  • MAC media access control
  • the scheduling here may be to send uplink data for the UE for resource allocation.
  • the first eNB determines a coordinated cell of the UE according to the measurement report sent by the UE.
  • the UE sends a measurement report to the first eNB, so that the first eNB determines the coordinated cell of the UE according to the measurement report.
  • the measurement report may include a downlink reference signal receiving power (RSRP) of multiple cells, that is, an average value of signal powers received on all resource particles carrying the downlink reference signal, and is used to indicate a neighboring cell wireless signal.
  • RSRP downlink reference signal receiving power
  • the strength of the first eNB may be selected as a coordinated cell according to the RSRP measurement result reported by the UE to measure the neighboring cell in the neighboring cell that meets the requirement that the downlink RSRP meets the requirement (for example, the serving cell RSRP difference is within a specified threshold).
  • the first eNB sends the management information to the second eNB to which the coordinated cell belongs.
  • the management information may include scheduling information for accessing the UE in the first eNB, cell level configuration information, and the like, and configured to enable the second eNB to receive and parse the management information, to forward the received information from the UE to the first eNB according to the parsing result. Upstream data.
  • the first eNB sends control information to the UE, to indicate that the UE retransmits data or newly transmitted data.
  • the first eNB may send control information to the UE through a Physical Downlink Control Channel (PDCCH) or a PHICH.
  • the PHICH may carry an ACK signal or a NACK signal to indicate that the UE retransmits or newly transmits data.
  • Other scheduling information or control information may be carried in the PDCCH.
  • the UE sends the same uplink data to the first eNB and the second eNB at the same time.
  • the UE may send the same data to the first eNB and the second eNB at each Transmission Time Interval Bundling (TTI) in the process of transmitting the uplink data, that is, each TTI time.
  • TTI Transmission Time Interval Bundling
  • the UE sends different uplink data.
  • the time slot binding TTI Bundling technology may be used to enable the UE to enter the TTI Bundling state, that is, the UE may be in a continuous number of TTIs (for example, may be four).
  • the same data or different derivative data of the same data is sent to the first eNB and the second eNB.
  • the first eNB may send a signal to the UE to establish the UE to enter the TTI Bundling state when establishing a connection with the UE, or obtain the transmission quality when the UE sends the uplink data in the communication process after the connection, and according to Transmission quality determination Whether to send an indication signal to the UE, instructing the UE to enter a TTI Bundling state to send uplink data.
  • the transmission quality may include a signal-to-noise ratio (SNR), a signal-to-interference ratio (SINR), or a modulation and coding (MCS) of the UE, and may also include other parameters, which are not limited herein.
  • the first base station can indicate The UE sends the uplink data in the TTI Bundling state to improve the uplink data volume successfully transmitted by the UE.
  • the MCS can indicate the data transmission rate of the UE in the current modem decoding mode. Therefore, when the transmission rate is lower than a certain threshold, the indication signal can be sent to the UE to instruct the UE to enter the TTI Bundling state to send uplink data.
  • the second eNB After parsing the management information sent by the first eNB, the second eNB forwards the first uplink data received by the UE to the first eNB.
  • the time taken by the second eNB to forward the received first uplink data to the first eNB by the UE is t ms
  • the time when the first eNB receives the first uplink data forwarded by the second eNB is The time at which an eNB receives the second uplink data directly from the UE is delayed by t ms.
  • a possible implementation manner is that the second eNB may directly forward the first uplink data received from the UE to the first eNB. If the TTI Bundling technology is adopted, the second eNB may receive each TTI received. The first uplink data is forwarded to the first eNB, and the first uplink data of the multiple TTIs may be combined and then forwarded.
  • the second possible implementation manner is: the second eNB may further process the processed first uplink data. Send to the first eNB.
  • the method used by the second eNB to transmit data to the first eNB is not limited.
  • the second eNB may send the first data that is demodulated and decoded to the first uplink data to the first eNB, where the first data may include the second base station Data demodulation and decoding of data bits and result indication information and the like.
  • the second eNB since the amount of data in which the second eNB directly forwards the first uplink data is large, it can reach the Gbps level, and thus the bandwidth requirement of the transmission network between the base stations is high; on the other hand, when the bandwidth capability of the transmission network is affected Limited time, the second eNB may appear The transmission error is incorrect, or the first uplink data cannot be transmitted to the first eNB in time, so that the joint demodulation cannot be performed in time, and the correct rate of demodulation and decoding results when the first base station demodulates and decodes the uplink data of the UE is also reduced. Reduce the uplink rate of the UE.
  • the bandwidth requirement of the transmission network between the inter-base stations can be reduced to 1/10 to 1/8 before the demodulation decoding, thereby reducing the relationship between the base stations.
  • the bandwidth requirements of the transport network can be reduced to 1/10 to 1/8 before the demodulation decoding, thereby reducing the relationship between the base stations.
  • the second eNB may perform the compression processing on the first uplink data, and then forward the data to the first eNB, so that the method may be compared with directly forwarding the first uplink data by the second eNB.
  • the requirement for the inter-base station interaction bandwidth is reduced to 1/2 before the compression processing.
  • the first eNB determines whether the first uplink data that is forwarded by the second eNB is received before the first time. If the determination is yes, that is, the first eNB receives the first uplink data that is forwarded by the second eNB, step 308 is performed; If no, that is, the first eNB does not receive the first uplink data forwarded by the second eNB, step 309 is performed.
  • the first eNB performs joint demodulation and decoding on the second uplink data received by the UE and the first uplink data forwarded by the second eNB, and determines a demodulation and decoding result, or the first eNB forwards according to the second eNB.
  • the first data determines the demodulation decoding result, and then step 315 or step 316 is performed.
  • the first data is data obtained by demodulating and decoding the first uplink data by the second base station, and the first data may include data bits and result indication information after the second base station demodulates and decodes the first uplink data.
  • the first eNB may perform joint reception demodulation decoding according to the second uplink data directly received by the first eNB from the UE and the first uplink data forwarded by the second eNB, if the demodulation and decoding is correct, then A base station determines that the demodulation decoding result is correct; if the demodulation decoding error occurs, the first base station determines that the demodulation decoding result is incorrect, and the joint reception can be performed at the physical layer.
  • the first eNB may also determine a demodulation decoding result according to the first data forwarded by the second eNB. Specifically, if the second base station demodulates and decodes the first uplink data correctly, and the result indication information indicates that the demodulation and decoding is correct, the first base station determines that the demodulation and decoding result is positive. If the second base station demodulates and decodes the first uplink data, and the result indication information indicates a demodulation decoding error, the first base station determines that the demodulation and decoding result is incorrect, and the first eNB needs to directly access the UE from the UE. The received second uplink data is separately demodulated and decoded, and it is determined whether the demodulation decoding result is correct.
  • the first eNB needs to combine the demodulation and decoding results in the first data when the first eNB forwards the first data, if any of the second eNBs is available, if any The second eNB obtains the correct demodulation and decoding result, and the first eNB determines that the demodulation and decoding result is correct.
  • the merging operation may not be limited to the physical layer, but may also be performed in the data link layer or other layers.
  • the specific manner in which the first eNB determines whether the demodulation and decoding result is correct may be multiple.
  • the first eNB may carry the check code obtained by demodulating and decoding the uplink data of the UE and the uplink data of the UE. If the check code is the same as the check code carried in the uplink data of the UE, the flag position may be set to 1 to indicate that the demodulation and decoding result is correct; if the check code carried in the uplink data of the UE is different, Then, the flag position can be set to 0 to indicate that the demodulation decoding result is wrong.
  • the first eNB separately demodulates and decodes the second uplink data received from the UE, and determines whether the demodulation and decoding result is correct. If the demodulation and decoding result is determined to be correct, step 316 is performed; if demodulation is determined. If the decoding result is incorrect, step 310 is performed.
  • the first eNB suspends the hybrid automatic repeat request HARQ process.
  • the hybrid automatic repeat request HARQ process refers to that the first eNB performs uplink data retransmission scheduling on the UE when the demodulation and decoding result in an error result. If the demodulation and decoding result in step 309 is incorrect, the first eNB suspends the automatic retransmission request HARQ process, prohibiting the first eNB from performing uplink data retransmission scheduling on the UE, so as to delay waiting for the first eNB to forward the first eNB. Upstream data.
  • the first eNB when the first eNB separately demodulates and decodes the second uplink data received from the UE, and obtains an error demodulation and decoding result, the first eNB does not send a NACK signal to the UE, but passes the uplink control channel.
  • the PHICH sends an ACK signal to the UE to notify the UE that the first eNB receives the uplink data sent by the UE, but does not send the UL-Grant indication information of the HARQ process to the UE to prohibit the UE from transmitting new uplink data.
  • the UE Since for the UE, when the UE receives the ACK signal sent by the base station and the UL-Grant When the indication information indicates that the next data is sent, the UE transmits the data to the base station. If the first eNB does not send the UL-Grant indication information of the HARQ process to the UE, the UE does not send the first eNB to the first eNB. Sending new data means not only letting the UE not retransmit the data, nor does it transmit new data.
  • the first eNB determines whether the first uplink data forwarded by the second eNB is received between the first time and the second time. The second time is later than the first time. If the determination is yes, the first eNB receives the The first uplink data is performed in step 312. If the determination is no, that is, the first eNB does not receive the first uplink data, step 315 is performed.
  • a second time is added to determine whether to perform joint reception demodulation decoding.
  • the second time is later than the first time, and the prior art only has the first time to determine whether to perform joint reception and demodulation.
  • the second time is added, which can provide more time for the first eNB to perform joint reception demodulation decoding, and the correct rate of joint demodulation decoding is higher than that of the single decoding.
  • the correct rate of demodulation and decoding improves the demodulation and decoding performance, reduces the retransmission rate of the uplink data of the UE, and improves the uplink rate of the UE, so that the delay of data interaction between the base stations is long, and thus the The problem of low uplink rate of the UE caused by joint reception demodulation and decoding.
  • the second moment can be 10 ms later than the first moment, and the specific setting can be set according to the processing capability of the base station.
  • the time interval T1 (for example, may be 4 ms) after the first eNB sends the ACK signal to the UE and the UL-Grant indication information after the eNB sends the ACK signal in the TTI Bundling state is greater than the first eNB in the non-TTI Bundling state.
  • the time interval T2 after the ACK signal is sent to the UE and before the UL-Grant indication information is transmitted (the value of T2 is small, almost negligible), and thus the time when the first eNB waits for the arrival of the first uplink data forwarded by the second eNB may be extended. Therefore, there are two types of settings at the second time: time A and time B.
  • the time A is the second time.
  • the time B may be 4 ms later than the time A, so that the first eNB may be provided with more time to wait for receiving the first uplink data forwarded by the second eNB.
  • the first eNB may not use the HARQ.
  • the process hangs, and the second time is set in the time interval T1, where the time interval between the second time and the first time may be 4 ms or less. If the HARQ process is suspended in the TTI Bundling state, and the time interval T1 is added, the time interval between the second time and the first time may be longer, for example, 12 ms.
  • the first eNB performs joint demodulation and decoding on the second uplink data and the first uplink data, and determines a demodulation and decoding result, or the first eNB determines a demodulation and decoding result according to the first data forwarded by the second eNB.
  • step 308 The process of determining the demodulation and decoding result by the first eNB may be referred to step 308.
  • step 312 determines that the demodulation and decoding result is correct, and performs step 316.
  • the first eNB may also update the erroneous demodulation and decoding result obtained by demodulating and decoding at the first moment to the correct demodulation and decoding result, and determine the demodulation translation.
  • the code result is correct, and then step 316 is performed.
  • step 312 If the demodulation decoding error in step 312 is performed, the first eNB determines that the demodulation decoding result is incorrect, and performs step 315.
  • the first eNB reports the demodulation and decoding result error to the MAC layer, and sends the UL-Grant indication information to the UE, instructing the UE to perform data retransmission.
  • the first eNB reports the demodulation and decoding result to the MAC layer, and sends the UL-Grant indication information to the UE, instructing the UE to perform new data transmission.
  • FIG. 3 For a flowchart of a method for uplink cooperation of a cell in a process of transmitting uplink data by a UE, reference may be made to FIG. 3, and a flow chart of cell uplink cooperation method and data interaction may be referred to FIG. 4 .
  • the embodiment of the present invention provides a method for uplink cooperation of a cell, where the data exchange delay between the base stations is long, and the first eNB separately performs the second uplink data received from the UE.
  • the retransmission scheduling is not immediately performed as in the prior art, but the UE is prohibited from retransmitting the uplink data immediately by suspending the automatic retransmission request HARQ process.
  • the first eNB may be provided with the first uplink data that continues to wait for the second eNB to forward before the second time, and is combined.
  • Receiving demodulation decoding, and the correct rate of joint reception demodulation decoding is higher than the correct rate of demodulation and decoding of the first base station alone, thereby improving the uplink data amount of the UE successfully transmitted in a unit time, and improving the uplink of the UE.
  • the TTI Bundling technology can provide more time to wait for the first uplink data forwarded by the second eNB before the second moment, and perform joint reception demodulation decoding. Therefore, the embodiment of the present invention can solve the problem that the uplink rate of the UE is low due to the delay in data exchange between the base stations and the inability to perform joint reception demodulation and decoding.
  • an embodiment of the present invention further provides a first base station 500, where the base station 500 includes a processor 501, a transmitter 502, a receiver 503, a bus 504, and a memory 505, where the memory 505 is used to store instructions and Data, bus 504 is used to connect processor 501, transmitter 502, receiver 503 and memory 505, wherein the processor 501 executes the instructions for determining whether the receiver 503 received the user forwarded by the second base station before the first time instant
  • the data is demodulated and decoded.
  • the hybrid automatic repeat request HARQ process is suspended; the processor 501 executes the command to determine whether the receiver 503 is between the first time and the second time. Receiving the first uplink data forwarded by the second base station; if the processor 501 executes the command to determine that the first uplink data is received between the first time and the second time, the second time is later than the first time And performing joint demodulation decoding on the first uplink data and the second uplink data, and determining a demodulation decoding result, or determining a demodulation decoding result according to the first data forwarded by the second base station, where the first data is the second The base station demodulates and decodes the first uplink data.
  • the processor 501 executes the instruction and is further used to: Obtaining the transmission quality when the UE sends the uplink data, where the uplink data includes the first uplink data and the second uplink data, and the transmission quality includes a signal to noise ratio SNR, a signal to interference and noise ratio SINR, or a modulation and coding strategy MCS of the UE.
  • the sending, by the transmitter 502, the instruction is further configured to: send an indication signal to the UE according to the transmission quality acquired by the processor 501, where the indication signal is used to enable the UE to enter a time slot binding TTI Bundling state. To send upstream data.
  • the transmitter 502 executes the instruction for suspending the hybrid automatic repeat request (HARQ) process, including: sending an acknowledgment signal ACK to the UE, and not sending the new HARQ process to the UE.
  • the indication information is sent, and the new transmission indication information is used to indicate that the UE continues to send the next uplink data.
  • the processor 501 is configured to perform the joint demodulation and decoding on the first uplink data and the second uplink data, and determine the demodulation and decoding result, including:
  • the demodulation and decoding is correct, it is determined that the demodulation and decoding result is correct; if the demodulation and decoding is incorrect, the demodulation and decoding result is determined to be incorrect.
  • the processor 501 is configured to determine, according to the first data forwarded by the second base station, a demodulation and decoding result, where the first data includes the second uplink data of the second base station. Demodulating the decoded data bits and result indication information, including:
  • the second base station demodulates and decodes the first uplink data correctly, and the result indication information indicates that the demodulation and decoding is correct, it is determined that the demodulation and decoding result is correct;
  • the second base station demodulates and decodes the first uplink data, and the result indication information indicates a demodulation decoding error, it determines that the demodulation decoding result is incorrect.
  • the sending, by the transmitter 502 may be further configured to: if the first base station 500 determines that the demodulation and decoding result is incorrect after the second time, send the retransmission indication information to the UE.
  • the retransmission indication information is used to indicate that the UE retransmits the uplink data. If the first base station 500 determines that the demodulation and decoding result is correct after the second moment, the UE is sent to the UE. Send a new delivery message.
  • the serving cell of the UE belongs to the first base station 500, and the coordinated cell belongs to the second base station, and the first base station 500 does not receive the first uplink data forwarded by the second base station before the first moment.
  • the first base station 500 demodulates and decodes the second uplink data received from the UE to obtain an erroneous demodulation and decoding result, and suspends the hybrid automatic repeat request HARQ process.
  • the technology immediately performs the retransmission scheduling, and waits to receive the first uplink data forwarded by the second base station until the second time. Therefore, the time of the joint reception demodulation decoding is delayed from the first time in the prior art to the implementation of the present invention.
  • the second time in the example so that the first uplink data forwarded by the second base station does not arrive at the first base station 500 in time before the first time due to the long data interaction delay between the base stations, the first base station 500 has more The time is jointly received and demodulated and decoded, and since the correct rate of joint reception demodulation decoding is higher than the correct rate of demodulation and decoding of the first base station 500 alone, the transmission time per unit time is improved.
  • Successful UE uplink data amount to enhance the uplink rate of the UE, to solve the problem due to the long delay between the base station data exchange, so can not be combined low rate uplink UE receives the demodulated result of decoding.
  • the disclosed base station and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • each functional unit may be integrated into one processing unit, or each unit may be physically included separately, or two or more units may be integrated into one unit.
  • the above units may be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the foregoing program may be stored in a computer readable storage medium, and when executed, the program includes the steps of the foregoing method embodiment; and the foregoing storage medium includes: a USB flash drive, a mobile hard disk, and a read only A medium that can store program codes, such as a memory (Read Only Memory, ROM for short), a random access memory (RAM), a magnetic disk, or an optical disk.

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Abstract

本发明实施例提供一种小区上行协作的方法和基站，涉及通信领域，能够解决由于基站间数据交互时延较长，从而无法进行联合接收解调译码导致的UE上行速率低的问题。具体方案为：第一基站确定第一时刻之前是否接收到第二基站转发的用户设备UE发送的第一上行数据，若确定否，则第一基站对从UE接收到的第二上行数据进行解调译码，若得到错误的解调译码结果，则第一基站将HARQ进程挂起，并确定在第一时刻与第二时刻之间是否接收到第二基站转发的第一上行数据，第二时刻晚于第一时刻，若确定是，则第一基站对第一上行数据和第二上行数据进行联合解调译码，并确定解调译码结果。本发明实施例用于基站对UE上行数据的解调译码。

Description

一种小区上行协作的方法和基站
本申请要求于2014年10月24日提交中国专利局、申请号为201410577216.4、发明名称为“一种小区上行协作的方法和基站”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域，尤其涉及一种小区上行协作的方法和基站。
背景技术
上行协作多点传输(Coordinated Multiple Points，CoMP)技术是利用基站内的多个扇区或多个基站对用户设备(User Equipment，UE)的上行数据进行联合接收解调译码，以达到提高边缘UE的覆盖性能，提升UE上行速率的目的。例如，UE的服务小区归属于基站0，协作小区归属于基站1～K(K≥1)，基站0与基站1～K对UE发送的上行数据进行联合接收解调译码。在该方式中，基站0完成MAC层调度后，将管理信息(例如，接入UE的调度信息)发送给基站1～K，而后，UE同时向基站0和基站1～K发送相同的上行数据，基站1～K将接收到的上行数据转发给基站0，基站0在指定时间T内完成数据的联合接收解调译码，并根据联合解调译码结果进行重传调度或新传调度。
上述过程中，基站0在指定时间T内设定有时刻1，若基站0在该时刻1之前接收到基站1～K转发的上行数据，则基站0将基站0单独接收到的上行数据与基站1～K转发的上行数据进行合并，以进行联合解调译码。而联合接收解调译码需要在指定时间内完成，由于网络拥塞、网络能力受限等因素可能导致基站间的数据交互时延较长，使得基站1～K转发的上行数据在时刻1之前无法及时到达基站0，导致了基站0没有充足的时间进行联合解调译码，这时基站0就对从UE单独接收到的上行数据进行解调译码。
但是，由于单独解调译码结果的正确率低于联合解调译码结果的正确率，因而导致了UE的数据重传率高，也即降低了单位时间内UE传输成功的上行数据量，从而降低了UE的上行速率。
发明内容
本发明的实施例提供了一种小区上行协作的方法和基站，用以解决基站间交互时延较长，从而无法进行联合接收解调译码导致的UE上行速率低的问题。
为达到上述目的，本发明的实施例采用如下技术方案：
第一方面，提供一种基站，包括：
第一确定单元，用于确定在第一时刻之前是否接收到第二基站转发的用户设备UE发送的第一上行数据，所述UE的服务小区归属于所述第一基站，所述UE的协作小区归属于所述第二基站；
处理单元，用于若所述第一确定单元确定否，则对从所述UE接收到的第二上行数据进行解调译码，若得到错误的解调译码结果，则将混合自动重传请求HARQ进程挂起；
第二确定单元，用于确定在所述第一时刻与第二时刻之间是否接收到所述第二基站转发的所述第一上行数据；
解调译码单元，用于若所述第二确定单元确定在所述第一时刻与所述第二时刻之间接收到所述第一上行数据，所述第二时刻晚于所述第一时刻，则对所述第一上行数据和所述第二上行数据进行联合解调译码，并确定解调译码结果，或根据所述第二基站转发的第一数据确定解调译码结果，所述第一数据为所述第二基站对所述第一上行数据进行解调译码后的数据。
结合第一方面，在第一方面的第一种可能实现的方式中，还包括：
获取单元，用于获取所述UE发送上行数据时的传输质量，所述上行数据包括所述第一上行数据和所述第二上行数据，所述传输 质量包括所述UE的信噪比SNR、信干噪比SINR或调制与编码策略MCS；
第一发送单元，用于根据所述获取单元获取的所述传输质量向所述UE发送指示信号，所述指示信号用于使所述UE进入时隙绑定TTI Bundling状态以发送所述上行数据。
结合第一方面或第一方面的第一种可能的实现方式，在第一方面的第二种可能实现的方式中，所述处理单元具体用于：
向所述UE发送确认信号ACK，并不向所述UE发送所述HARQ进程的新传指示信息，所述新传指示信息用于指示所述UE继续发送下一个上行数据。
结合第一方面或第一方面的第一种或第二种可能的实现方式，在第一方面的第三种可能实现的方式中，所述解调译码单元具体用于：
对从所述UE接收到的所述第二上行数据和所述第二基站转发的所述第一上行数据进行联合解调译码；
若解调译码正确，则确定所述解调译码结果正确；若解调译码错误，则确定所述解调译码结果错误。
结合第一方面或第一方面的第一种或第二种可能的实现方式，在第一方面的第四种可能实现的方式中，所述第一数据包括所述第二基站对所述第一上行数据解调译码后的数据比特和结果指示信息；
所述解调译码单元具体用于：
若所述第二基站对所述第一上行数据解调译码正确，所述结果指示信息指示解调译码正确，则确定所述解调译码结果正确；
若所述第二基站对所述第一上行数据解调译码错误，所述结果指示信息指示解调译码错误，则确定所述解调译码结果错误。
结合第一方面或第一方面的第一至第四种可能的实现方式中的任意一种，在第一方面的第五种可能实现的方式中，还包括：
第二发送单元，用于若在所述第二时刻后，所述第一基站确定所述解调译码结果错误，则向所述UE发送重传指示信息，所述重传指示信息用于指示所述UE重传所述上行数据；
若在所述第二时刻后，所述第一基站确定所述解调译码结果正确，则向所述UE发送所述新传指示信息。
第二方面，提供一种小区上行协作的方法，包括：
第一基站确定在第一时刻之前是否接收到第二基站转发的用户设备UE发送的第一上行数据，所述UE的服务小区归属于所述第一基站，所述UE的协作小区归属于所述第二基站；
若确定否，则所述第一基站对从所述UE接收到的第二上行数据进行解调译码，若得到错误的解调译码结果，则所述第一基站将混合自动重传请求HARQ进程挂起，并确定在所述第一时刻与第二时刻之间是否接收到所述第二基站转发的所述第一上行数据；
若在所述第一时刻与所述第二时刻之间接收到所述第一上行数据，所述第二时刻晚于所述第一时刻，则所述第一基站对所述第一上行数据和所述第二上行数据进行联合解调译码，并确定解调译码结果，或所述第一基站根据所述第二基站转发的第一数据确定解调译码结果，所述第一数据为所述第二基站对所述第一上行数据进行解调译码后的数据。
结合第二方面，在第二方面的第一种可能实现的方式中，所述方法还包括：
所述第一基站获取所述UE发送上行数据时的传输质量，所述上行数据包括所述第一上行数据和所述第二上行数据，所述传输质量包括所述UE的信噪比SNR、信干噪比SINR或调制与编码策略MCS；
所述第一基站根据所述传输质量向所述UE发送指示信号，所述指示信号用于使所述UE进入时隙绑定TTI Bundling状态以发送所述上行数据。
结合第二方面或第二方面的第一种可能的实现方式，在第二方面的第二种可能实现的方式中，所述第一基站将混合自动重传请求HARQ进程挂起包括：
所述第一基站向所述UE发送确认信号ACK，并不向所述UE发送所述HARQ进程的新传指示信息，所述新传指示信息用于指示所述UE继续发送下一个上行数据。
结合第二方面或第二方面的第一种或第二种可能的实现方式，在第二方面的第三种可能实现的方式中，所述第一基站对所述第一上行数据和所述第二上行数据进行联合解调译码，并确定解调译码结果包括：
所述第一基站对从所述UE接收到的所述第二上行数据和所述第二基站转发的所述第一上行数据进行联合解调译码；
若解调译码正确，则所述第一基站确定所述解调译码结果正确；若解调译码错误，则所述第一基站确定所述解调译码结果错误。
结合第二方面或第二方面的第一种或第二种可能的实现方式，在第二方面的第四种可能实现的方式中，所述第一数据包括所述第二基站对所述第一上行数据解调译码后的数据比特和结果指示信息；
所述第一基站根据所述第二基站转发的第一数据确定解调译码结果包括：
若所述第二基站对所述第一上行数据解调译码正确，所述结果指示信息指示解调译码正确，则所述第一基站确定所述解调译码结果正确；
若所述第二基站对所述第一上行数据解调译码错误，所述结果 指示信息指示解调译码错误，则所述第一基站确定所述解调译码结果错误。
结合第二方面或第二方面的第一至第四种可能的实现方式中的任意一种，在第二方面的第五种可能实现的方式中，所述方法还包括：
若在所述第二时刻后，所述第一基站确定所述解调译码结果错误，则所述第一基站向所述UE发送重传指示信息，所述重传指示信息用于指示所述UE重传所述上行数据；
若在所述第二时刻后，所述第一基站确定所述解调译码结果正确，则所述第一基站向所述UE发送所述新传指示信息。
本发明实施例提供的一种小区上行协作的方法和基站，UE的服务小区归属于第一基站，协作小区归属于第二基站，当第一时刻之前第一基站没有接收到第二基站转发的第一上行数据，且第一基站对从UE接收到的第二上行数据进行解调译码得到错误的解调译码结果时，将混合自动重传请求HARQ进程挂起，此时，不再如现有技术那样立刻进行重传调度，而是等待接收第二基站转发的第一上行数据直至第二时刻，因而联合接收解调译码的时刻就由现有技术中的第一时刻延迟到了本发明实施例中的第二时刻，从而使得当基站间数据交互时延较长导致第二基站转发的第一上行数据没有在第一时刻之前及时到达第一基站时，第一基站有较多的时间进行联合接收解调译码，而由于联合接收解调译码的正确率高于第一基站单独解调译码的正确率，因而提高了单位时间内传输成功的UE上行数据量，提升了UE的上行速率，解决了由于基站间数据交互时延较长，从而无法进行联合接收解调译码导致的UE上行速率低的问题。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍， 显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明实施例提供的一种基站结构图；
图2为本发明实施例提供的一种小区上行协作的方法流程图；
图3为本发明实施例提供的另一种小区上行协作的方法流程图；
图4为本发明实施例提供的一种小区上行协作的方法的信今与数据交互流程图；
图5为本发明实施例提供的另一种基站结构图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
本发明实施例提供的一种小区上行协作的方法可应用于各种通信系统，例如2G，3G通信系统和下一代通信系统，例如全球移动通信系统(Global System for Mobile Communications，GSM)，时分多址(Time Division Multiple Access，TDMA)系统，码分多址(Code Division Multiple Access，CDMA)系统，通用分组无线业务(General Packet Radio Service，GPRS)系统，长期演进(Long Term Evolution，LTE)系统，以及其他此类通信系统。
本申请中结合UE和基站进行描述。
UE，可以是有线设备或无线设备，例如可以是指向用户提供语音和/或数据连通性的设备，具有无线连接功能的手持式设备、或连接到无线调制解调译码器的其他处理设备。
基站(例如，接入点)可以是指接入网中在空中接口上通过一个或多个扇区与无线终端通信的设备。例如，基站可以是GSM或CDMA中的基站(BTS，Base Transceiver Station)，也可以是WCDMA中的基站(NodeB)，还可以是LTE中的演进型基站(evolutional Node B，NodeB或eNB或e-NodeB)，本发明并不限定。
参见图1，本发明实施例提供了一种第一基站100，UE的服务小区归属于该第一基站，具体可以包括以下部分：
第一确定单元101，用于确定在第一时刻之前是否接收到第二基站转发的用户设备UE发送的第一上行数据，UE的服务小区归属于第一基站，UE的协作小区归属于第二基站。
其中，UE的服务小区是指为UE提供语音、数据等各种通信业务服务的主服务小区，协作小区是UE主服务小区的相邻小区，用于通过与主服务小区交互从UE接收的上行数据，以实现多个基站数据的联合接收。这里的UE是同时向第一基站100和第二基站发送相同的上行数据的，第二基站可以有一个或多个，以提高UE的上行速率。
处理单元102，用于若第一确定单元101确定否，则对从UE接收到的第二上行数据进行解调译码，若得到错误的解调译码结果，则将混合自动重传请求(Hybrid Automatic Repeat Request，HARQ)进程挂起。
其中，解调译码包括基站从接收到UE的上行数据开始，经过下变频、解扰、解码等一系列处理操作，恢复原有用数据信息的过程。
混合自动重传请求HARQ进程用于在解调译码得到错误结果时立即进行重传调度，若将该进程挂起，则禁止立即进行重传调度，此时UE保持当前所处状态而不发送上行数据，直至第一基站100发送(UpLink Grant，UL-Grant)上行授权指示信息至UE，UE才进行数据的重传或新传。
可选地，处理单元102可以具体用于，向UE发送确认信号 (Acknowledgement，ACK)，并不向UE发送上述HARQ进程的新传指示信息，以将自动重传请求HARQ进程挂起。其中，该新传指示信息用于指示UE继续发送下一个上行数据。
第二确定单元103，用于确定在第一时刻与第二时刻之间是否接收到第二基站转发的第一上行数据。
解调译码单元104，用于若第二确定单元103确定在第一时刻与第二时刻之间接收到第一上行数据，第二时刻晚于第一时刻，则对第一上行数据和第二上行数据进行联合解调译码，并确定解调译码结果，或根据第二基站转发的第一数据确定解调译码结果，第一数据为第二基站对第一上行数据进行解调译码后的数据。
若在第一时刻与第二时刻之间，一旦有第二基站(可以是一个或多个)转发的第一上行数据到达，则解调译码单元104用于对从UE接收到的第二上行数据和第二基站转发的第一上行数据进行联合解调译码，并确定解调译码结果。
可选地，解调译码单元104可以具体用于，对从UE接收到的第二上行数据和第二基站转发的第一上行数据进行联合解调译码；
若解调译码正确，则确定解调译码结果正确；若解调译码错误，则确定解调译码结果错误。
可选地，第一数据可以包括第二基站对第一上行数据解调译码后的数据比特和结果指示信息；
解调译码单元104可以具体用于：
若第二基站对第一上行数据解调译码正确，结果指示信息指示解调译码正确，则确定解调译码结果正确；
若第二基站对第一上行数据解调译码错误，结果指示信息指示解调译码错误，则确定解调译码结果错误。
解调译码单元104用于确定解调译码结果是否正确的方式可以有多种，例如，可以将对UE上行数据解调译码后得到的校验码与UE上行数据中携带的校验码相比较，若与UE上行数据中携带的校验码相同，则可以将标志位置为1，以表示解调译码结果正确；若 与UE上行数据中携带的校验码不同，则可以将标志位置为0，以表示解调译码结果错误。
可选地，还可以包括获取单元105，用于获取UE发送上行数据时的传输质量。其中，这里的上行数据包括第一上行数据和第二上行数据，传输质量可以包括UE的信噪比(Signal/Noise，SNR)、信干噪比(Signal/Interference and Noise，SINR)或调制与编码策略(Modulation and Coding Scheme，MCS)，还可以包括其它参数，这里不做限定。
可选地，还可以包括第一发送单元106，用于根据获取单元105获取的传输质量向UE发送指示信号，指示信号用于使UE进入时隙绑定TTI Bundling状态以发送上行数据，第一基站100和第二基站接收UE在该TTI Bundling状态下发送的上行数据。
示例性的，在UE与基站之间进行语音业务传输时，当UE的SNR或者信干噪比SINR小于某一阈值时，说明混在语音信号里的噪声大，声音回放的音质低，这时第一发送单元106可以用于指示UE以时隙绑定(Transmission Time Interval Bundling，TTI Bundling)状态发送上行数据，以提高UE传输成功的上行数据量。而MCS可以说明在当前的调制解调译码方式下UE的数据传输速率，因此，当传输速率低于某一阈值时，第一发送单元106可以用于可以向UE发送指示信号，以指示UE进入TTI Bundling状态发送上行数据。
可选地，还可以包括第二发送单元107，用于若在第二时刻后，第一基站100确定解调译码结果错误，则向UE发送重传指示信息，重传指示信息用于指示UE重传上行数据；
若在第二时刻后，第一基站100确定解调译码结果正确，则向UE发送新传指示信息。
本发明实施例提供的基站，UE的服务小区归属于第一基站100，协作小区归属于第二基站，当第一时刻之前第一基站100没有接收到第二基站转发的第一上行数据，且第一基站100对从UE接收到的第二上行数据进行解调译码得到错误的解调译码结果时，将混合 自动重传请求HARQ进程挂起，此时，不再如现有技术那样立刻进行重传调度，而是等待接收第二基站转发的第一上行数据直至第二时刻，因而联合接收解调译码的时刻就由现有技术中的第一时刻延迟到了本发明实施例中的第二时刻，从而使得由于基站间数据交互时延较长导致第二基站转发的第一上行数据没有在第一时刻之前及时到达第一基站100时，第一基站100有较多的时间进行联合接收解调译码，而由于联合接收解调译码的正确率高于第一基站100单独解调译码的正确率，因而提高了单位时间内传输成功的UE上行数据量，提升了UE的上行速率，解决了由于基站间数据交互时延较长，从而无法进行联合接收解调译码导致的UE上行速率低的问题。
本发明实施例提供了一种小区上行协作的方法，如图2所示，该方法可以包括以下步骤：
201、第一基站确定在第一时刻之前是否接收到第二基站转发的用户设备UE发送的第一上行数据，UE的服务小区归属于第一基站，UE的协作小区归属于第二基站。
其中，UE的服务小区是指为UE提供语音、数据等各种通信业务服务的主服务小区，协作小区是UE主服务小区的相邻小区，用于通过与主服务小区交互从UE接收的上行数据，以实现多个基站数据的联合接收。这里的UE是同时向第一基站和第二基站发送相同的上行数据的，第二基站可以有一个或多个，以提高UE的上行速率。
202、若第一基站确定否，则第一基站对从UE接收到的第二上行数据进行解调译码，若得到错误的解调译码结果，则第一基站将混合自动重传请求HARQ进程挂起，并确定在第一时刻与第二时刻之间是否接收到第二基站转发的第一上行数据。
其中，解调译码包括基站从接收到UE的上行数据开始，经过下变频、解扰、解码等一系列处理操作，恢复原有用数据信息的过程。
混合自动重传请求HARQ进程用于在解调译码得到错误结果时立即进行重传调度，若将该进程挂起，则禁止立即进行重传调度，此时UE保持当前所处状态而不发送上行数据，直至第一基站发送UL-Grant指示信息至UE，UE才进行数据的重传或新传。
具体的，当第一基站在第一时刻之前没有接收到第二基站转发的UE发送的第一上行数据时，第一基站会对从UE接收到的第二上行数据进行单独解调译码，如果解调译码得到正确的解调译码结果，则第一基站向UE发送确认信号ACK及UL-Grant指示信息，指示UE继续发送下一个数据。其中，由于第一基站当前可能存在多个需要调度的UE，当前UE需要按顺序等待第一基站的调度，因而第一基站可能在向当前UE发送确认信号ACK后立即发送UL-Grant指示信息，第一基站也可能在向当前UE发送确认信号ACK一段时间后，再发送UL-Grant指示信息；如果单独解调译码得到错误的解调译码结果，则第一基站不发送非确认信号(Negative Acknowledgement，NACK)信号，也就是不触发UE进行数据重传，而是仍然向UE发送ACK信号以通知UE第一基站已接收到UE发送的上行数据，即第一基站将自动重传请求HARQ进程挂起，禁止UE立即进行数据重传，但第一基站发送ACK的同时，不向UE发送上述HARQ进程的UL-Grant指示信息指示UE发送新的数据，对于UE来说，UE接收不到第一基站发送的UL-Grant指示信息，就不会进行数据新传，也就是不仅让UE不进行数据重传，也不进行数据新传。
其中，若第一基站对从UE接收到的第二上行数据进行单独解调译码得到错误的解调译码结果，则现有技术中，第一基站向UE发送非确认信号NACK及UL-Grant指示信息进行重传调度，或者第一基站不向UE发送任何信息，这样UE的物理混合自动重传指示信道(Physical Hybrid ARQ Indicator Channel，PHICH)信道检测结果就会确认为NACK，从而使得UE发起非自适应重传进行数据重传。在本发明实施例中，第一基站将自动重传请求HARQ进程挂起，此 时UE保持当前所处状态而不发送上行数据，且第一基站延长等待第二基站转发的UE第一上行数据至第二时刻，从而延长了第一基站等待接收第二基站转发的第一上行数据的时间，即为第一基站提供了更多的时间进行联合接收解调译码以提高解调译码结果的正确率，从而提高单位时间内UE传输成功的上行数据量，提升了UE的上行速率。
示例性的，在频分双工(Frequency Division Duplexing，FDD)系统中，第一基站对上行数据的接收时刻与解调译码开始时刻之间的间隔小于0.5ms，而解调译码的时间较长，一般大于2ms。这里的第二时刻与第一时刻之间的时间间隔可以为8ms。
203、若在第一时刻与第二时刻之间接收到第一上行数据，其中，第二时刻晚于第一时刻，则第一基站对第一上行数据和第二上行数据进行联合解调译码，并确定解调译码结果，或第一基站根据第二基站转发的第一数据确定解调译码结果，第一数据为第二基站对第一上行数据进行解调译码后的数据。
其中，第一数据可以包括第二基站对第一上行数据解调译码后的数据比特和结果指示信息。
若在第一时刻与第二时刻之间，一旦有第二基站(可以是一个或多个)转发的第一上行数据到达，则第一基站就对从UE接收到的第二上行数据和第二基站转发的第一上行数据进行联合解调译码，并确定解调译码结果。
确定解调译码结果是否正确的方式可以有多种，例如，第一基站可以将对UE上行数据解调译码后得到的校验码与UE上行数据中携带的校验码相比较，若与UE上行数据中携带的校验码相同，则可以将标志位置为1，以表示解调译码结果正确；若与UE上行数据中携带的校验码不同，则可以将标志位置为0，以表示解调译码结果错误。
可选地，第一基站对第一上行数据和第二上行数据进行联合解调译码，并确定解调译码结果包括：如果第二基站在接收到UE发 送的第一上行数据之后，没有对上行数据进行解调译码，这时第一基站对从UE接收到的第二上行数据和第二基站转发的第一上行数据进行联合解调译码；若解调译码正确，则第一基站确定解调译码结果正确，若解调译码错误，则第一基站确定解调译码结果错误。或者，若第一基站对从UE接收到的第二上行数据和第二基站转发的第一上行数据进行联合解调译码得到正确的解调译码结果，则第一基站也可以将步骤202中得到的错误的解调译码结果更新为正确的解调译码结果，并确定解调译码结果正确。
可选地，第一基站根据第二基站转发的第一数据确定解调译码结果包括：若第二基站对第一上行数据解调译码正确，结果指示信息指示解调译码正确，则第一基站确定解调译码结果正确；若第二基站对第一上行数据解调译码错误，结果指示信息指示解调译码错误，则第一基站确定解调译码结果错误。或者，若第二基站对第一上行数据解调译码正确，结果指示信息指示解调译码正确，则第一基站也可以将步骤202中得到的错误的解调译码结果更新为正确的解调译码结果，并确定解调译码结果正确。
这样一来，若第一基站在第二时刻后确定解调译码结果正确，则发送UL-Grant指示信息指示UE进行数据新传；若第一基站在第二时刻后确定解调译码结果错误，则发送UL-Grant指示信息指示UE进行数据重传。
这里确定的解调译码结果错误可以包括：当第一时刻对第一基站从UE接收到的第二上行数据进行单独解调译码得到错误的解调译码结果，且第二时刻之前第二基站转发的第一上行数据仍然没有到达第一基站，则第一基站最终确定解调译码结果错误；或者第二时刻之前第二基站转发的第一上行数据到达第一基站，但第二基站转发的是对第一上行数据解调译码后的第一数据，且第二基站对第一上行数据解调译码错误，结果指示信息指示解调译码错误，则第一基站最终确定解调译码结果错误；或第一基站接收到的是第二基站转发的未经解调译码的第一上行数据，但第一基站对从第二基站 接收到的第一上行数据和直接从UE接收到的第二上行数据进行联合解调译码，仍然得到错误的解调译码结果，则第一基站最终确定解调译码结果错误。
本发明实施例提供的一种小区上行协作的方法，UE的服务小区归属于第一基站，协作小区归属于第二基站，当第一时刻之前第一基站没有接收到第二基站转发的第一上行数据，且第一基站对从UE接收到的第二上行数据进行解调译码得到错误的解调译码结果时，将混合自动重传请求HARQ进程挂起，此时，不再如现有技术那样立刻进行重传调度，而是等待接收第二基站转发的第一上行数据直至第二时刻，因而联合接收解调译码的时刻就由现有技术中的第一时刻延迟到了本发明实施例中的第二时刻，从而使得由于基站间数据交互时延较长导致第二基站转发的第一上行数据没有在第一时刻之前及时到达第一基站时，第一基站有较多的时间进行联合接收解调译码，而由于联合接收解调译码的正确率高于第一基站单独解调译码的正确率，因而提高了单位时间内传输成功的UE上行数据量，提升了UE的上行速率，解决了由于基站间数据交互时延较长，从而无法进行联合接收解调译码导致的UE上行速率低的问题。
下面将结合具体实施例对UE发送上行数据的过程中小区上行协作的方法进行详细描述。
本发明实施例以LTE系统中的基站eNB及用户设备UE进行说明。其中，第一基站eNB为UE服务小区归属的基站0，第二基站eNB可以为UE协作小区归属的基站1～K(K≥1)中的一个或多个，如图3所示，具体步骤可以包括：
301、第一eNB根据UE的业务需求进行介质访问控制(Media Access Control，MAC)层调度。
例如，这里的调度可以是为UE发送上行数据进行资源分配。
302、第一eNB根据UE发送的测量报告确定UE的协作小区。
示例性的，当第一eNB为UE分配好资源后，UE便向第一eNB发送测量报告，以使第一eNB根据该测量报告确定UE的协作小区， 该测量报告可以包括多个小区的下行参考信号接收功率(Reference Signal Receiving Power，RSRP)，即承载下行参考信号的所有资源粒子上接收到的信号功率的平均值，用于表示相邻小区无线信号的强度，第一eNB可以根据UE上报的RSRP测量结果选择测量邻区中下行RSRP满足要求(例如与服务小区RSRP差值在指定门限值内)的相邻小区作为协作小区。
303、第一eNB向协作小区归属的第二eNB发送管理信息。
其中，该管理信息可以包括第一eNB中接入UE的调度信息、小区级配置信息等，用于使第二eNB接收并解析该管理信息，以根据解析结果向第一eNB转发从UE接收到的上行数据。
304、第一eNB向UE发送控制信息，用以指示UE重传数据或新传数据。
在第一eNB确认了UE的协作小区归属的基站后，第一eNB可以通过物理下行控制信道(Physical Downlink Control Channel，PDCCH)或PHICH向UE发送控制信息。其中，PHICH中可以承载ACK信号或NACK信号，用以指示UE重传或新传数据。PDCCH中可以承载其它的调度信息或控制信息。
305、UE同时向第一eNB及第二eNB发送相同的上行数据。
该步骤中，UE在发送上行数据的过程中，可以以每个传输时间间隔(Transmission Time Interval Bundling，TTI)向第一eNB及第二eNB发送一个相同的数据，也就是说每个TTI时间内UE发送的是不同的上行数据。
但为了提高当前数据的传输成功率，可选的，可以采用时隙绑定TTI Bundling技术，使得UE进入TTI Bundling状态，即UE可以在连续若干个TTI(例如，可以是4个)时间内，同时向第一eNB及第二eNB发送相同的数据或者同一数据的不同衍生数据。
具体地，第一eNB可以在与UE建立连接时就向UE发送信号，用以指定UE进入TTI Bundling状态；也可以通过在连接后的通信过程中获取UE发送上行数据时的传输质量，并根据传输质量确定 是否向UE发送指示信号，指示UE进入TTI Bundling状态以发送上行数据。其中，该传输质量可以包括UE的信噪比SNR、信干噪比SINR或调制与编码策略MCS等，也可以包括其它参数，这里不进行限定。示例性的，在UE与基站之间进行语音业务传输时，当UE的SNR或者SINR小于某一阈值时，说明混在语音信号里的噪声大，声音回放的音质低，这时第一基站可以指示UE以TTI Bundling状态发送上行数据，以提高UE传输成功的上行数据量。而MCS可以说明在当前的调制解调译码方式下UE的数据传输速率，因此，当传输速率低于某一阈值时，可以向UE发送指示信号，以指示UE进入TTI Bundling状态发送上行数据。
306、第二eNB在解析第一eNB发送的管理信息后，将从UE接收到的第一上行数据转发给第一eNB。
示例性的，如果第二eNB将从UE将接收到的第一上行数据转发给第一eNB所用的时间为t ms，则第一eNB接收到第二eNB转发的第一上行数据的时刻比第一eNB直接从UE接收到第二上行数据的时刻延迟了t ms。
其中，一种可能实现的方式是：第二eNB可以直接将从UE接收到的第一上行数据转发给第一eNB，这里若采用TTI Bundling技术，第二eNB可以将接收到的每个TTI的第一上行数据转发给第一eNB，也可以将多个TTI的第一上行数据进行合并后再进行转发；第二种可能实现的方式是：第二eNB还可以将处理后的第一上行数据发送给第一eNB。本发明实施例对第二eNB具体采用哪种方式将数据发送给第一eNB不做限定。
具体地，针对第二种可能实现的方式，第二eNB可以将对该第一上行数据进行解调译码后的第一数据发送给第一eNB，该第一数据可以包括第二基站对上行数据解调译码后的数据比特和结果指示信息等。这是因为，一方面，由于第二eNB直接转发第一上行数据的数据量大，可以达到Gbps量级，因而对基站间传输网的带宽要求较高；另一方面，当传输网带宽能力受限时，第二eNB可能会出现 传输错误，或不能将第一上行数据及时传输给第一eNB，从而不能及时进行联合解调，也会降低第一基站对UE上行数据进行解调译码时解调译码结果的正确率，降低UE的上行速率。而将解调译码后的第一数据发送给第一eNB，可以将基站间传输网带宽的要求降至未经解调译码之前的1/10～1/8，从而降低了对基站间传输网的带宽要求。
或者，针对第二种可能实现的方式，第二eNB也可以对第一上行数据进行压缩处理后，再转发给第一eNB，这样与第二eNB直接转发第一上行数据相比，该方式可以将对基站间的交互带宽的要求降至未经压缩处理前的1/2。
307、第一eNB确定在第一时刻之前是否接收到第二eNB转发的第一上行数据，若确定是，即第一eNB接收到第二eNB转发的第一上行数据，则执行步骤308；若确定否，即第一eNB没有收到第二eNB转发的第一上行数据，则执行步骤309。
308、第一eNB对从UE接收到的第二上行数据和第二eNB转发的第一上行数据进行联合解调译码，并确定解调译码结果，或第一eNB根据第二eNB转发的第一数据确定解调译码结果，而后执行步骤315或步骤316。
其中，第一数据为第二基站对第一上行数据进行解调译码后的数据，第一数据可以包括第二基站对第一上行数据解调译码后的数据比特和结果指示信息。
在步骤308中，第一eNB可以根据第一eNB从UE直接接收到的第二上行数据和第二eNB转发的第一上行数据进行联合接收解调译码，若解调译码正确，则第一基站确定解调译码结果正确；若解调译码错误，则第一基站确定解调译码结果错误，该联合接收可以在物理层进行。
或者，第一eNB也可以根据第二eNB转发的第一数据来确定解调译码结果。具体的，若第二基站对第一上行数据解调译码正确，结果指示信息指示解调译码正确，则第一基站确定解调译码结果正 确；若第二基站对第一上行数据解调译码错误，结果指示信息指示解调译码错误，则第一基站确定解调译码结果错误，这时就需要第一eNB对从UE直接接收到的第二上行数据进行单独解调译码，并确定解调译码结果是否正确。其中，由于第二eNB可以有多个，所以第一eNB在接收到第二eNB转发的第一数据时，需要对第一数据中的解调译码结果进行合并操作，如果确定有任一第二eNB得到的是正确的解调译码结果，则第一eNB确定解调译码结果正确。该合并操作可以不局限于物理层，也可以在数据链路层或其它层中进行。
其中，第一eNB确定解调译码结果是否正确的具体方式可以有多种，示例性的，第一eNB可以将对UE上行数据解调译码后得到的校验码与UE上行数据中携带的校验码相比较，若与UE上行数据中携带的校验码相同，则可以将标志位置为1，以表示解调译码结果正确；若与UE上行数据中携带的校验码不同，则可以将标志位置为0，以表示解调译码结果错误。
309、第一eNB对从UE接收到的第二上行数据进行单独解调译码，并确定解调译码结果是否正确，若确定解调译码结果正确，则执行步骤316；若确定解调译码结果错误，则执行步骤310。
310、第一eNB将混合自动重传请求HARQ进程挂起。
其中，混合自动重传请求HARQ进程是指在解调译码得到错误结果时，第一eNB对UE进行上行数据重传调度。若步骤309中的解调译码结果错误，则第一eNB将自动重传请求HARQ进程挂起，禁止第一eNB对UE进行上行数据重传调度，以便于延迟等待第二eNB转发的第一上行数据。
示例性的，在第一eNB对从UE接收到的第二上行数据进行单独解调译码，得到错误解调译码结果时，第一eNB不发送NACK信号给UE，而是通过上行控制信道PHICH向UE发送ACK信号以通知UE第一eNB接收到UE发送的上行数据，但不向UE发送上述HARQ进程的UL-Grant指示信息，以禁止UE发送新的上行数据。由于对于UE来说，当UE接收到基站发送的ACK信号和UL-Grant 指示信息指示其发送下一个数据时，UE才会新传数据至基站，而如果本实施例中第一eNB不向UE发送上述HARQ进程的UL-Grant指示信息，则UE就不向第一eNB发送新的数据，也就是不仅让UE不进行数据重传，也不进行数据新传。
311、第一eNB确定在第一时刻与第二时刻之间是否接收到第二eNB转发的第一上行数据，该第二时刻晚于第一时刻，若确定是，即第一eNB接收到该第一上行数据，则执行步骤312，若确定否，即第一eNB没有收到该第一上行数据，则执行步骤315。
在步骤311中，增设了第二时刻来确定是否进行联合接收解调译码，该第二时刻晚于第一时刻，与现有技术只设有第一时刻来确定是否进行联合接收解调译码相比，当基站间数据交互时延较长时，增设第二时刻，可以为第一eNB提供更多的时间进行联合接收解调译码，而联合解调译码的正确率高于单独解调译码的正确率，从而提高了解调译码性能，降低了UE上行数据的重传率，提升了UE的上行速率，这样就可以解决由于基站间数据交互时延较长，从而无法进行联合接收解调译码导致的UE上行速率低的问题。
若不采用TTI Bundling技术，举例来说，第二时刻可以比第一时刻晚10ms，具体的设定可以根据基站处理能力来设定。
若采用TTI Bundling技术，由于TTI Bundling状态下在第一eNB向UE发送ACK信号之后与发送UL-Grant指示信息之前的时间间隔T1(例如，可以是4ms)，大于非TTI Bundling状态下第一eNB向UE发送ACK信号之后与发送UL-Grant指示信息之前的时间间隔T2(T2值很小，几乎可以忽略)，因而可以延长第一eNB等待第二eNB转发的第一上行数据到来的时间。所以，第二时刻的设定可以有两种：时刻A和时刻B，当UE没有进入TTI Bundling状态传输上行数据时，以时刻A为第二时刻，当UE进入TTI Bundling状态传输上行数据时，以时刻B为第二时刻。例如，时刻B可以比时刻A晚4ms，这样可以为第一eNB提供更多的时间等待接收第二eNB转发的第一上行数据。
需要说明的是，由于在TTI Bundling状态下，第一eNB向UE发送ACK信号之后与发送UL-Grant指示信息之前的时间间隔T1较长(例如，4ms)，因而第一eNB也可以不将HARQ进程挂起，而在时间间隔T1内设定第二时刻，这里第二时刻与第一时刻之间的时间间隔可以为4ms或者小于4ms。而若在TTI Bundling状态下，将HARQ进程挂起，再加上时间间隔T1，就会使得第二时刻与第一时刻之间的时间间隔可以更长，例如可以为12ms。
312、第一eNB对第二上行数据和第一上行数据进行联合解调译码，并确定解调译码结果，或第一eNB根据第二eNB转发的第一数据确定解调译码结果。
其中，第一eNB确定解调译码结果的过程可以参见步骤308。
313、若步骤312中的解调译码正确，则第一eNB确定解调译码结果正确，执行步骤316。
或者，若步骤312中的解调译码正确，第一eNB也可以将第一时刻解调译码得到的错误的解调译码结果更新为正确的解调译码结果，并确定解调译码结果正确，而后执行步骤316。
314、若步骤312中的解调译码错误，则第一eNB确定解调译码结果错误，执行步骤315。
315、当确定解调译码结果错误时，第一eNB上报解调译码结果错误至MAC层，并发送UL-Grant指示信息至UE，指示UE进行数据重传。
316、当确定解调译码结果正确时，第一eNB上报解调译码结果正确至MAC层，并发送UL-Grant指示信息至UE，指示UE进行数据新传。
本发明实施例在UE发送上行数据的过程中小区上行协作的方法流程图可以参见图3，小区上行协作方法信今与数据交互流程图可以参见图4。
本发明实施例提供一种小区上行协作的方法，当基站间数据交互时延较长，且第一eNB对从UE接收到的第二上行数据进行单独 解调译码得到错误的解调译码结果时，不再如现有技术那样立即进行重传调度，而是通过将自动重传请求HARQ进程挂起，禁止UE立即重传上行数据，从而当第二基站转发的第一上行数据没有在第一时刻之前及时到达第一基站时，可以为第一eNB提供时间在第二时刻之前继续等待接收第二eNB转发的第一上行数据，并进行联合接收解调译码，又由于联合接收解调译码的正确率高于第一基站单独解调译码的正确率，从而提高了单位时间内传输成功的UE上行数据量，提升了UE的上行速率；而采用TTI Bundling技术，可以在第二时刻之前提供更多的时间等待接收第二eNB转发的第一上行数据，并进行联合接收解调译码。因此，本发明实施例可以解决由于基站间数据交互时延较长从而无法进行联合接收解调译码导致的UE上行速率低的问题。
参见图5，本发明实施例还提供了一种第一基站500，该基站500包括：处理器501、发送器502、接收器503、总线504和存储器505，其中，存储器505用于存储指令和数据，总线504用于连接处理器501、发送器502、接收器503和存储器505，其中该处理器501执行该指令用于确定在第一时刻之前接收器503是否接收到第二基站转发的用户设备UE发送的第一上行数据，UE的服务小区归属于第一基站500，UE的协作小区归属于第二基站；若处理器501执行该指令确定否，则对从UE接收到的第二上行数据进行解调译码，若得到错误的解调译码结果，则将混合自动重传请求HARQ进程挂起；处理器501执行该指令确定在第一时刻与第二时刻之间接收器503是否接收到第二基站转发的第一上行数据；若处理器501执行该指令确定在第一时刻与第二时刻之间接收到第一上行数据，第二时刻晚于第一时刻，则对第一上行数据和第二上行数据进行联合解调译码，并确定解调译码结果，或根据第二基站转发的第一数据确定解调译码结果，第一数据为第二基站对第一上行数据进行解调译码后的数据。
在本发明实施例中，可选地，该处理器501执行该指令还用于： 获取UE发送上行数据时的传输质量，上行数据包括第一上行数据和第二上行数据，传输质量包括UE的信噪比SNR、信干噪比SINR或调制与编码策略MCS。
在本发明实施例中，可选地，该发送器502执行该指令还用于：根据处理器501获取的传输质量向UE发送指示信号，指示信号用于使UE进入时隙绑定TTI Bundling状态以发送上行数据。
在本发明实施例中，可选地，该发送器502执行该指令用于将混合自动重传请求HARQ进程挂起，包括：向UE发送确认信号ACK，并不向UE发送上述HARQ进程的新传指示信息，新传指示信息用于指示UE继续发送下一个上行数据。
在本发明实施例中，可选地，该处理器501执行该指令用于对第一上行数据和第二上行数据进行联合解调译码，并确定解调译码结果，包括：
对从UE接收到的第二上行数据和第二基站转发的第一上行数据进行联合解调译码；
若解调译码正确，则确定解调译码结果正确；若解调译码错误，则确定解调译码结果错误。
在本发明实施例中，可选地，该处理器501执行该指令用于根据第二基站转发的第一数据确定解调译码结果，其中，第一数据包括第二基站对第一上行数据解调译码后的数据比特和结果指示信息，包括：
若第二基站对第一上行数据解调译码正确，结果指示信息指示解调译码正确，则确定解调译码结果正确；
若第二基站对第一上行数据解调译码错误，结果指示信息指示解调译码错误，则确定解调译码结果错误。
在本发明实施例中，可选地，该发送器502执行该指令还可以用于：若在第二时刻后，第一基站500确定解调译码结果错误，则向UE发送重传指示信息，重传指示信息用于指示UE重传上行数据；若在第二时刻后，第一基站500确定解调译码结果正确，则向UE 发送新传指示信息。
因此，本发明实施例提供的基站，UE的服务小区归属于第一基站500，协作小区归属于第二基站，当第一时刻之前第一基站500没有接收到第二基站转发的第一上行数据，且第一基站500对从UE接收到的第二上行数据进行解调译码得到错误的解调译码结果时，将混合自动重传请求HARQ进程挂起，此时，不再如现有技术那样立刻进行重传调度，而是等待接收第二基站转发的第一上行数据直至第二时刻，因而联合接收解调译码的时刻就由现有技术中的第一时刻延迟到了本发明实施例中的第二时刻，从而使得由于基站间数据交互时延较长导致第二基站转发的第一上行数据没有在第一时刻之前及时到达第一基站500时，第一基站500有较多的时间进行联合接收解调译码，而由于联合接收解调译码的正确率高于第一基站500单独解调译码的正确率，因而提高了单位时间内传输成功的UE上行数据量，提升了UE的上行速率，解决了由于基站间数据交互时延较长，从而无法进行联合接收解调译码导致的UE上行速率低的问题。
在本申请所提供的几个实施例中，应该理解到，所揭露的基站和方法，可以通过其它的方式实现。例如，以上所描述的设备实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
另外，在本发明各个实施例中的设备和系统中，各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理包括，也可以两个或两个以上单元集成在一个单元中。且上述的各单元既可以采用硬件的形式实现，也可以采用硬件加软件功能单元的形式实现。
实现上述方法实施例的全部或部分步骤可以通过程序指令相关 的硬件来完成，前述的程序可以存储于一计算机可读取存储介质中，该程序在执行时，执行包括上述方法实施例的步骤；而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read Only Memory，简称ROM)、随机存取存储器(Random Access Memory，简称RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应所述以权利要求的保护范围为准。

Claims (12)

  1. 一种基站，其特征在于，包括：
    第一确定单元，用于确定在第一时刻之前是否接收到第二基站转发的用户设备UE发送的第一上行数据，所述UE的服务小区归属于所述第一基站，所述UE的协作小区归属于所述第二基站；
    处理单元，用于若所述第一确定单元确定否，则对从所述UE接收到的第二上行数据进行解调译码，若得到错误的解调译码结果，则将混合自动重传请求HARQ进程挂起；
    第二确定单元，用于确定在所述第一时刻与第二时刻之间是否接收到所述第二基站转发的所述第一上行数据；
    解调译码单元，用于若所述第二确定单元确定在所述第一时刻与所述第二时刻之间接收到所述第一上行数据，所述第二时刻晚于所述第一时刻，则对所述第一上行数据和所述第二上行数据进行联合解调译码，并确定解调译码结果，或根据所述第二基站转发的第一数据确定解调译码结果，所述第一数据为所述第二基站对所述第一上行数据进行解调译码后的数据。
  2. 根据权利要求1所述的基站，其特征在于，还包括：
    获取单元，用于获取所述UE发送上行数据时的传输质量，所述上行数据包括所述第一上行数据和所述第二上行数据，所述传输质量包括所述UE的信噪比SNR、信干噪比SINR或调制与编码策略MCS；
    第一发送单元，用于根据所述获取单元获取的所述传输质量向所述UE发送指示信号，所述指示信号用于使所述UE进入时隙绑定TTI Bundling状态以发送所述上行数据。
  3. 根据权利要求1或2所述的基站，其特征在于，所述处理单元具体用于：
    向所述UE发送确认信号ACK，并不向所述UE发送所述HARQ进程的新传指示信息，所述新传指示信息用于指示所述UE继续发送下一个上行数据。
  4. 根据权利要求1至3任意一项所述的基站，其特征在于，所 述解调译码单元具体用于：
    对从所述UE接收到的所述第二上行数据和所述第二基站转发的所述第一上行数据进行联合解调译码；
    若解调译码正确，则确定所述解调译码结果正确；若解调译码错误，则确定所述解调译码结果错误。
  5. 根据权利要求1至3任意一项所述的基站，其特征在于，所述第一数据包括所述第二基站对所述第一上行数据解调译码后的数据比特和结果指示信息；
    所述解调译码单元具体用于：
    若所述第二基站对所述第一上行数据解调译码正确，所述结果指示信息指示解调译码正确，则确定所述解调译码结果正确；
    若所述第二基站对所述第一上行数据解调译码错误，所述结果指示信息指示解调译码错误，则确定所述解调译码结果错误。
  6. 根据权利要求1至5任意一项所述的基站，其特征在于，还包括：
    第二发送单元，用于若在所述第二时刻后，所述第一基站确定所述解调译码结果错误，则向所述UE发送重传指示信息，所述重传指示信息用于指示所述UE重传所述上行数据；
    若在所述第二时刻后，所述第一基站确定所述解调译码结果正确，则向所述UE发送所述新传指示信息。
  7. 一种小区上行协作的方法，其特征在于，包括：
    第一基站确定在第一时刻之前是否接收到第二基站转发的用户设备UE发送的第一上行数据，所述UE的服务小区归属于所述第一基站，所述UE的协作小区归属于所述第二基站；
    若确定否，则所述第一基站对从所述UE接收到的第二上行数据进行解调译码，若得到错误的解调译码结果，则所述第一基站将混合自动重传请求HARQ进程挂起，并确定在所述第一时刻与第二时刻之间是否接收到所述第二基站转发的所述第一上行数据；
    若在所述第一时刻与所述第二时刻之间接收到所述第一上行数 据，所述第二时刻晚于所述第一时刻，则所述第一基站对所述第一上行数据和所述第二上行数据进行联合解调译码，并确定解调译码结果，或所述第一基站根据所述第二基站转发的第一数据确定解调译码结果，所述第一数据为所述第二基站对所述第一上行数据进行解调译码后的数据。
  8. 根据权利要求7所述的方法，其特征在于，所述方法还包括：
    所述第一基站获取所述UE发送上行数据时的传输质量，所述上行数据包括所述第一上行数据和所述第二上行数据，所述传输质量包括所述UE的信噪比SNR、信干噪比SINR或调制与编码策略MCS；
    所述第一基站根据所述传输质量向所述UE发送指示信号，所述指示信号用于使所述UE进入时隙绑定TTI Bundling状态以发送所述上行数据。
  9. 根据权利要求7或8所述的方法，其特征在于，所述第一基站将混合自动重传请求HARQ进程挂起包括：
    所述第一基站向所述UE发送确认信号ACK，并不向所述UE发送所述HARQ进程的新传指示信息，所述新传指示信息用于指示所述UE继续发送下一个上行数据。
  10. 根据权利要求7至9任意一项所述的方法，其特征在于，所述第一基站对所述第一上行数据和所述第二上行数据进行联合解调译码，并确定解调译码结果包括：
    所述第一基站对从所述UE接收到的所述第二上行数据和所述第二基站转发的所述第一上行数据进行联合解调译码；
    若解调译码正确，则所述第一基站确定所述解调译码结果正确；若解调译码错误，则所述第一基站确定所述解调译码结果错误。
  11. 根据权利要求7至9任意一项所述的方法，其特征在于，所述第一数据包括所述第二基站对所述第一上行数据解调译码后的数据比特和结果指示信息；
    所述第一基站根据所述第二基站转发的第一数据确定解调译码结果包括：
    若所述第二基站对所述第一上行数据解调译码正确，所述结果指示信息指示解调译码正确，则所述第一基站确定所述解调译码结果正确；
    若所述第二基站对所述第一上行数据解调译码错误，所述结果指示信息指示解调译码错误，则所述第一基站确定所述解调译码结果错误。
  12. 根据权利要求7至11任意一项所述的方法，其特征在于，所述方法还包括：
    若在所述第二时刻后，所述第一基站确定所述解调译码结果错误，则所述第一基站向所述UE发送重传指示信息，所述重传指示信息用于指示所述UE重传所述上行数据；
    若在所述第二时刻后，所述第一基站确定所述解调译码结果正确，则所述第一基站向所述UE发送所述新传指示信息。
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