WO2015003614A1 - Procédé, dispositif et système de transmission de données planifiées par un centre de transmission multipoint coordonnée - Google Patents

Procédé, dispositif et système de transmission de données planifiées par un centre de transmission multipoint coordonnée Download PDF

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Publication number
WO2015003614A1
WO2015003614A1 PCT/CN2014/081823 CN2014081823W WO2015003614A1 WO 2015003614 A1 WO2015003614 A1 WO 2015003614A1 CN 2014081823 W CN2014081823 W CN 2014081823W WO 2015003614 A1 WO2015003614 A1 WO 2015003614A1
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comp
ccn
base station
serving base
transmission
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PCT/CN2014/081823
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English (en)
Chinese (zh)
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付喆
胡海静
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电信科学技术研究院
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Publication of WO2015003614A1 publication Critical patent/WO2015003614A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling

Definitions

  • BACKGROUND Coordinated Multiple Points Transmission/Reception refers to a plurality of transmission points (TPs) separated geographically, and cooperatively participates in data transmission to a terminal (physical downlink shared channel ( Physical Downlink Shared Channel (PDSCH) transmits or transmits data transmitted by one terminal (Physical Uplmk Shared Channel (PUSCH) transmission).
  • TPs transmission points
  • PDSCH Physical Downlink Shared Channel
  • PUSCH Physical Uplmk Shared Channel
  • multiple transmission points may be base stations of different cells, or may be multiple remote radio heads (RRHs) in the same control cell.
  • RRHs remote radio heads
  • the cooperative multi-point transmission technology can be divided into downlink coordinated multi-point transmission and uplink joint reception.
  • Downlink cooperative multi-point transmission is mainly divided into two transmission schemes: coordinated scheduling/coordinated beamforming (CS/CB) and joint processing (JP) scheme.
  • CS/CB coordinated scheduling/coordinated beamforming
  • JP joint processing
  • One of the multiple transmission points in the CS/CB transmission transmits a useful signal to the user terminal, and the other transmission points minimize interference to the user terminal through joint scheduling and beamforming.
  • the joint processing scheme can be divided into joint transmission (JT) and dynamic point selection (DPS ⁇ JT transmission in which multiple transmission points simultaneously transmit useful signals to the same user terminal, thereby enhancing the reception signal of the user terminal.
  • the DPS transmission dynamically switches the transmission point of the user terminal, and always selects the point transmission signal optimal for the user terminal from the coordinated transmission point.
  • Uplink CoMP is relatively simple for downlink CoMP, and the uplink cooperation mode mainly includes joint reception and cooperative scheduling.
  • the joint reception signals of the same UE received by multiple receiving points are jointly processed to obtain an output signal.
  • the base station side schedules the UE by considering multiple receiving points in the coordinated area to minimize the interference.
  • Non-central scheduling does not have a central node for global optimization scheduling. In order to achieve near-global optimization results, it may be necessary to use an iterative scheduling method between the base stations.
  • the cooperative base stations may need to perform multiple scheduling information interactions, as shown in Figure 1. If the backhaul delay between the base stations is large, the non-central scheduling performs multiple scheduling information interactions, which will cause the scheduling delay to be too large, resulting in outdated channel information, thus affecting the transmission performance.
  • each cooperative base station transmits the recently received channel state information (CSI) information of the user terminal accessing the base station to a central coordmat on node (CCN).
  • the CCN centrally schedules time domain and frequency domain resources for the user terminals of all the cooperative base stations, and the relevant base station transmits data for the user terminal according to the resource scheduling information and the precoding result sent by the CCN, as shown in FIG. 2 .
  • backhaul backhaul
  • the information exchange between base stations in CoMP cooperative scheduling should consider the ideal backhaul and non-ideal backhaul.
  • non-ideal backhaul transmission delays can reach 10ms or more.
  • the Rel-12 CoMP technology uses the central cooperative scheduling scheme under non-ideal backhaul links as one of the main CoMP research scenarios.
  • the central cooperative scheduling scheme mainly has the following problems: The impact of backhaul delay on CoMP central scheduling.
  • the network architecture of the Evolved Universal Terrestrial Radio Access Network is shown in FIG. 3, and the E-UTRAN is composed of an evolved base station eNB.
  • the eNB completes the access network function and communicates with the user equipment (UE) through the air interface.
  • MME Mobility Management Entity
  • S1-MME interface is used to provide control plane services for the UE, including mobility management and bearer management functions.
  • the Service Gateway (S-GW) is connected to the eNB through an S1-U interface. For each UE attached to the network, one S-GW serves it.
  • the S1-U interface is used to provide user plane services for the UE, and the user plane data of the UE is transmitted between the S-GW and the eNB through the S1-U bearer.
  • the present invention provides a data transmission method, apparatus, and system for coordinated multi-point transmission center scheduling, and a data transmission method for cooperative coordinated multi-point transmission center cooperative scheduling, which helps the network side to timely and accurately implement scheduling decisions and data for CoMP UEs. Transmission processing reduces the impact of backhaul delay on CoMP center scheduling.
  • the invention provides a data transmission method for coordinated multi-point transmission center scheduling, which comprises:
  • the central cooperative node CCN acquires the user plane data to be transmitted of the coordinated multipoint transmission user terminal CoMP UE from the serving gateway SGW;
  • the CCN acquires channel state information CSI of all UEs from its scheduled transmission point;
  • the present invention provides a data transmission method for cooperative coordinated multi-point transmission center cooperative scheduling in a non-ideal backhaul scenario between base stations.
  • the method enhances the existing LTE-A architecture and can solve the non-ideal backhaul scenario.
  • the user data transmission processing problem when the CCN is used as the scheduling control node helps the network side to timely and accurately implement the scheduling decision and data transmission processing for the CoMP user, and reduces the impact of the backhaul delay on the CoMP center scheduling.
  • the CCN communicates with the scheduled transmission point, and performs scheduling transmission of the user plane data of the CoMP UE, including:
  • the CCN determines, according to the size of the user plane data to be transmitted of the CoMP UE and the CSI of all the UEs, the coordinated transmission point of the CoMP UE when the CoMP UE performs coordinated multi-point transmission, and generates scheduling information and media access control protocol data of the CoMP UE.
  • Unit MAC PDU
  • the CC notifies the CoMP UE of the coordinated transmission point of the generated scheduling information and MAC PDU.
  • the CCN when the coordinated transmission point of the CoMP UE does not include the serving base station of the CoMP UE, the CCN also notifies the serving base station of the CoMP UE of the generated scheduling information and the MAC PDU.
  • the serving base station of the CoMP UE determines the CoMP resource according to the scheduling information of the CCN according to the negative acknowledgement NACK feedback information of the CoMP UE, and uses the current non-CoMP resource. Scheduling CoMP UE data retransmission.
  • the serving base station of the CoMP UE uses the current non-CoMP resource to schedule CoMP UE data retransmission, including:
  • the serving base station of the CoMP UE uses the CCN to schedule the CoMP UE to retransmit the CoMP UE data at a time other than the new data transmission by the serving base station to the CoMP UE.
  • the serving base station of the CoMP UE uses the current non-CoMP resource to schedule CoMP UE data retransmission, which specifically includes:
  • the CCN does not schedule the CoMP UE at the time when the serving base station of the possible CoMP UE schedules CoMP UE data retransmission.
  • the serving base station performs new data transmission to the CoMP UE; or
  • the serving base station that does not schedule the CoMP UE performs new data transmission to the CoMP UE.
  • the serving base station of the CoMP UE retransmits data to the CoMP UE when determining that data retransmission is required according to the negative acknowledgement NACK feedback information of the CoMP UE;
  • the serving base station of the CoMP UE schedules a new data transmission to the CoMP UE to the CoMP UE, the serving base station of the CoMP UE receives the new data and retransmits the data respectively through the two HARQs. ACK/NACK feedback.
  • the CCN communicates with the scheduled transmission point, and performs scheduling transmission of the user plane data of the CoMP UE, including:
  • the CCN determines, when the CoMP UE performs non-multipoint coordinated transmission according to the size of the user plane data to be transmitted of the CoMP UE and the CSI of all UEs:
  • the CCN generates scheduling information of the CoMP UE and a media access control protocol data unit MAC PDU, and sends the generated scheduling information and the MAC PDU to the serving base station of the CoMP UE; or
  • the CCN generates scheduling information of the CoMP UE, and sends the generated scheduling information of the CoMP UE and the user plane data to be transmitted to the serving base station of the CoMP UE; or
  • the CC sends the user plane data to be transmitted and the non-cooperative transmission point identifier to the serving base station of the CoMP UE.
  • the CCN generates scheduling information of the CoMP UE, and the scheduling information of the generated CoMP UE and the user plane data to be transmitted are sent to the serving base station of the CoMP UE, which specifically includes:
  • the CCN generates scheduling information of the CoMP UE, and sends the generated scheduling information of the CoMP UE and part of the user plane data to be transmitted to the serving base station of the CoMP UE;
  • the service base station of the CoMP UE only generates the MAC PDU by scheduling information of the CoMP UE and part of the data to be transmitted, and performs single point transmission of the CoMP UE;
  • the serving base station of the CoMP UE notifies the CCN of the identity of the transmitted data.
  • the CCN acquires the user plane data to be transmitted of the CoMP UE from the SGW based on the user plane downlink data path of the pre-established SGW-CCN-CoMP UE serving base station-CoMP UE.
  • the user-side downlink data path of the serving base station-coMP UE of the pre-established SGW-CCN-CoMP UE includes:
  • the user plane downlink data path of the serving base station-CoMP UE of the SGW-CCN-CoMP UE is established for the CoMP UE by the path change mode.
  • SGW-CCN-CoMP is established for the CoMP UE in the initial RRC connection establishment process of the CoMP UE.
  • the user-side downlink data path of the serving base station of the UE, the CoMP UE specifically includes:
  • the serving base station of the CoMP UE receives the attach request message of the CoMP UE;
  • the serving base station of the CoMP UE determines that the CoMP UE establishes the user plane downlink data path of the SGW-CCN-CoMP UE serving base station-CoMP UE, it instructs the core network to establish an S1-U connection of the serving base station of the SGW-CCN-CoMP UE.
  • the serving base station of the CoMP UE instructs the core network to establish an S1-U connection of the serving base station of the SGW-CCN-CoMP UE, which specifically includes:
  • the serving base station of the CoMP UE sends the attach request message and the related information of the CoMP UE to the CCN through an interface with the CCN according to the mapping relationship between the stored cooperative set of the serving base station including the CoMP UE and the CCN;
  • the CC transmits the attach request message and the related information of the CoMP UE and the CCN related information to the mobility management entity MME, and establishes an S1-MME connection of the serving base station of the MME-CCN-CoMP UE;
  • the MME triggers the establishment of an S1-U connection of the serving base station of the SGW-CCN-CoMP UE.
  • the serving base station of the CoMP UE instructs the core network to establish an S1-U connection of the serving base station of the SGW-CCN-CoMP UE, which specifically includes:
  • the serving base station of the CoMP UE sends a message including the ETURAN cell global identity ECGI corresponding to the CCN to the MME, and notifies the MME to switch the user plane connection between the SGW and the CCN;
  • the MME triggers the establishment of the S1-U connection of the serving base station of the SGW-CCN-CoMP UE according to the notification.
  • the method further comprises:
  • the MME notifies the CCN that the coordinated multipoint transmission function of the CoMP UE is activated.
  • the user plane downlink data path of the serving base station-CoMP UE of the SGW-CCN-CoMP UE is established for the CoMP UE, which specifically includes:
  • the serving base station of the CoMP UE receives the attach request message of the CoMP UE;
  • the serving eNB sends the received attach request message and related information of the CoMP UE to the mobility management entity MME;
  • the MME determines the EUTRAN cell corresponding to the CC according to the mapping relationship between the coordinated set of the serving base station including the CoMP UE and the CCN.
  • the global identity ECGI replaces the ECGI corresponding to the serving base station of the CoMP UE and notifies the SGW.
  • the method further includes: the MME notifying the serving base station that the serving base station user plane downlink data path is a serving base station of the SGW-CCN-CoMP UE;
  • the MME notifies the CCN that the coordinated multipoint transmission function of the CoMP UE is activated, and the user plane downlink data path is the serving base station of the SGW-CCN-CoMP UE.
  • the method further includes: the MME sending a control plane path change indication message to the serving base station/CCN of the CoMP UE, and notifying the control plane that the path is changed to the serving base station of the MME-CCN-CoMP UE.
  • the user-side downlink data path of the serving base station-CoMP UE of the SGW-CCN-CoMP UE is established for the CoMP UE by using the path change manner, which specifically includes:
  • the serving base station of the CoMP UE determines to trigger the CoMP UE to perform coordinated multi-point transmission, and notifies the MME to perform the user plane downlink data path switching by using the path switching process;
  • the MME changes the user plane downlink data path to the serving base station of the SGW-CCN-CoMP UE according to the notification.
  • the method further includes: the serving base station of the CoMP UE transmitting the CoMP UE identifier and the coordinated multipoint transmission request to the CCN;
  • the serving base station of the CoMP UE receives the coordinated multi-point transmission response fed back by the CCN.
  • the serving base station of the CoMP UE determines to trigger the CoMP UE to perform coordinated multi-point transmission, and specifically includes: determining, by the serving base station of the CoMP UE, whether the CoMP UE is triggered to perform coordinated multi-point transmission according to the measurement report of the CoMP UE; or
  • the serving base station of the CoMP UE determines, according to the location information of the CoMP UE, whether to trigger the CoMP UE to perform coordinated multipoint transmission; or
  • the serving base station of the CoMP UE receives the trigger sent by the CCN when the CoMP UE performs the coordinated multi-point transmission notification, and determines to trigger the CoMP UE to perform coordinated multi-point transmission.
  • the CCN when the CCN is activated, sending a notification that triggers the CoMP UE to perform coordinated multipoint transmission to the serving base station of the CoMP UE; or
  • the CCN determines to trigger the CoMP UE to perform coordinated multi-point transmission according to the CSI and CoMP UE location information reported by each transmission point, and when the CCN is activated, the CCN sends a notification to the serving base station of the CoMP UE to trigger the CoMP UE to perform coordinated multi-point transmission.
  • the path change mode is established for the CoMP UE.
  • the serving base station of the SGW-CCN-CoMP UE - the user plane downlink data path of the CoMP UE including:
  • the target serving base station of the CoMP UE After the RRC connection is established by the CoMP UE, the target serving base station of the CoMP UE notifies the MME to perform the user plane downlink data path switching through the path switching process during the cell handover.
  • the MME changes the user plane downlink data path to the serving base station of the SGW-CCN-CoMP UE according to the notification.
  • the method further includes:
  • the serving base station of the CoMP UE triggers an RRC connection with the COMP UE, and switches to an RRC connection between the COMP UE and the CCN.
  • the CCN is the same as the serving base station of the CoMP UE, and the user-side downlink data path of the serving base station-CoMP UE of the pre-established SGW-CCN-CoMP UE includes: The original serving base station of the CoMP UE initiates a handover procedure when the CoMP UE performs coordinated multipoint transmission, and switches the serving base station of the CoMP UE to the CCN.
  • the original serving base station of the CoMP UE determines whether to trigger the CoMP UE to perform coordinated multi-point transmission according to the measurement report of the CoMP UE; or
  • the original serving base station of the CoMP UE determines, according to the location information of the CoMP UE, whether to trigger the CoMP UE to perform coordinated multipoint transmission; or
  • the original serving base station of the CoMP UE receives the trigger sent by the CCN when the CoMP UE performs the coordinated multi-point transmission notification, and determines to trigger the CoMP UE to perform coordinated multi-point transmission.
  • the CCN when the CCN is activated, sending a notification to the serving base station of the CoMP UE that triggers the CoMP UE to perform coordinated multipoint transmission or
  • the CCN determines to trigger the CoMP UE to perform coordinated multi-point transmission according to the CSI and CoMP UE location information reported by each transmission point, and when the CCN is activated, the CCN sends a notification to the serving base station of the CoMP UE to trigger the CoMP UE to perform coordinated multi-point transmission.
  • the present invention also provides a data transmission method for coordinated multi-point transmission center scheduling, including:
  • the transmission point scheduled by the central cooperative node CCN reports the channel state information CSI of all UEs communicating with the transmission point to the CCN;
  • the transmission point communicates with the CCN to determine the CoMP resource used by the coordinated multi-point transmission user terminal CoMP UE data transmission, uses the CoMP resource to perform the user plane data scheduling transmission of the CoMP UE, and uses the non-CoMP resource to perform the non-CoMP UE user plane data scheduling transmission. .
  • the existing LTE-A architecture is enhanced, which can solve the problem of user data transmission and processing when the CCN is used as the scheduling control node in the non-ideal backhaul scenario, and helps the network side to timely and accurately implement the scheduling decision for the CoMP user. And data transmission processing, reducing the impact of backhaul delay on CoMP center scheduling.
  • the transmission point performs the user plane data scheduling transmission of the CoMP UE by using the CoMP resource, and specifically includes: receiving, by the CCN, the scheduling information of the CoMP UE and the medium access control protocol data unit MAC PDU that are sent when the CoMP UE performs coordinated multi-point transmission;
  • the CCN schedules the CoMP UE to perform coordinated multi-point transmission, where the transmission point is a service base station of the CoMP UE, and the method further includes:
  • the serving base station of the CoMP UE determines that data retransmission is required according to the negative acknowledgement NACK feedback information of the CoMP UE, and schedules CoMP UE data retransmission using the current non-CoMP resource.
  • the method further includes: if the serving base station of the CoMP UE retransmits the data to the CoMP UE, determining that the serving base station of the CC scheduling CoMP UE performs new data transmission to the CoMP UE, and the serving base station of the CoMP UE receives the new by each of the two HARQs. ACK/NACK feedback of data and retransmitted data.
  • the CCN scheduling CoMP UE performs non-coordinated multipoint transmission
  • the transmission point is a serving base station of the CoMP
  • the transmission point performs the user plane data scheduling transmission of the CoMP UE by using the CoMP resource, which specifically includes:
  • the serving base station of the CoMP determines the scheduling information, determines the CoMP resource according to the scheduling information, and generates a MAC PDU, and uses the CoMP resource transmission on the PDSCH.
  • MAC PDU uses the CoMP resource transmission on the PDSCH.
  • the transmission point is a serving base station of the CoMP, and the method further includes:
  • the serving base station of the CoMP UE receives the attach request message of the CoMP UE;
  • the serving base station of the CoMP UE instructs the core network to establish an S1-U connection of the serving base station of the SGW-CCN-CoMP UE, which specifically includes:
  • the serving base station of the CoMP UE sends the attach request message and the related information of the CoMP UE to the CCN through the interface with the CCN according to the stored mapping relationship between the coordinated set of the serving base station including the CoMP UE and the CCN, and the CCN attaches the request message. And transmitting related information of the CoMP UE and related information of the CCN to the mobility management entity MME, establishing an S1-MME connection of the serving base station of the MME-CCN-CoMP UE; or
  • the MME sends a message including the ETU AN cell global identity (ECGI) corresponding to the CCN to the MME, and notifies the MME to switch the user plane connection between the SGW and the CCN, and the MME triggers the establishment of the SGW-CCN-CoMP UE according to the notification.
  • ECGI ETU AN cell global identity
  • the transmission point is a serving base station of the CoMP, and the method further includes:
  • the serving base station of the CoMP UE determines to trigger the CoMP UE to perform coordinated multi-point transmission, and notifies the MME to perform the user plane downlink data path switching by using the path switching process, and the downlink data path of the user plane is changed to SGW-CCN- The serving base station of the CoMP UE.
  • the method further includes: the serving base station of the CoMP UE transmitting the CoMP UE identifier and the coordinated multipoint transmission request to the CCN;
  • the serving base station of the CoMP UE receives the coordinated multi-point transmission response fed back by the CCN.
  • the serving base station of the CoMP UE determines to trigger the CoMP UE to perform coordinated multi-point transmission, and specifically includes: determining, by the serving base station of the CoMP UE, whether the CoMP UE is triggered to perform coordinated multi-point transmission according to the measurement report of the CoMP UE; or
  • the serving base station of the CoMP UE determines, according to the location information of the CoMP UE, whether to trigger the CoMP UE to perform coordinated multipoint transmission; or
  • the serving base station of the CoMP UE receives the trigger sent by the CCN when the CoMP UE performs the coordinated multi-point transmission notification, and determines to trigger the CoMP UE to perform coordinated multi-point transmission.
  • the method further includes:
  • the serving base station of the CoMP UE triggers an RRC connection with the COMP UE, and switches to an RRC connection between the COMP UE and the CCN.
  • the present invention also provides a central collaboration node CCN, including:
  • a data receiving unit configured to acquire, from the serving gateway SGW, user plane data to be transmitted of the coordinated multipoint transmission user terminal CoMP UE;
  • a channel information acquiring unit configured to acquire channel state information CSI of all UEs from a transmission point scheduled by the CCN; a scheduling unit, configured to perform transmission with the CCN according to the user plane data to be transmitted of the CoMP UE and the channel state information CSI of all UEs Point communication, performing scheduled transmission of user plane data of the CoMP UE.
  • the scheduling unit communicates with the CCN scheduled transmission point, and performs scheduling transmission of the user plane data of the CoMP UE, specifically:
  • the CCN determines, according to the size of the user plane data to be transmitted of the CoMP UE and the CSI of all the UEs, the coordinated transmission point of the CoMP UE when the CoMP UE performs coordinated multi-point transmission, and generates scheduling information and media access control protocol data of the CoMP UE.
  • Unit MAC PDU
  • the CCN notifies the CoMP UE of the coordinated transmission point of the generated scheduling information and MAC PDU.
  • the scheduling unit when the coordinated transmission point of the CoMP UE does not include the serving base station of the CoMP UE, the scheduling unit also notifies the serving base station of the CoMP UE of the generated scheduling information and the MAC PDU.
  • the scheduling unit does not schedule the serving base station of the CoMP UE to perform new data transmission to the CoMP UE at the time when the serving base station of the possible CoMP UE schedules the CoMP UE data retransmission; or
  • the scheduling unit does not schedule the CoMP UE before receiving the ACK feedback from the serving base station of the CoMP UE to the retransmitted data.
  • the serving base station performs new data transmission to the CoMP UE.
  • the scheduling unit communicates with the CCN scheduled transmission point, and performs scheduling transmission of the user plane data of the CoMP UE, specifically:
  • the user plane data to be transmitted and the non-cooperative transmission point identifier are sent to the serving base station of the CoMP UE.
  • the CCN generates scheduling information of the CoMP UE, and sends the generated scheduling information of the CoMP UE and part of the user plane data to be transmitted to the serving base station of the CoMP UE;
  • the serving base station of the CoMP UE generates a MAC PDU according to the scheduling information of the CoMP UE and part of the to-be-transmitted data, and performs a single point transmission of the CoMP UE;
  • the data receiving unit acquires the user plane data of the CoMP UE to be transmitted from the SGW based on the user plane downlink data path of the pre-established SGW-CCN-CoMP UE serving base station-CoMP UE.
  • the method further includes: an attach message receiving unit, configured to receive an attach request message sent by the serving base station of the CoMP UE, and related information of the CoMP UE;
  • a message forwarding unit configured to transmit the attach request message and the related information of the CoMP UE and the CCN related information to the mobility management entity MME, and establish an S1-MME connection of the serving base station of the MME-CCN-CoMP UE.
  • the method further includes: a notification unit, configured to send, when the CCN is activated, a notification that triggers the CoMP UE to perform coordinated multi-point transmission to the serving base station of the CoMP UE; or determine to trigger the CoMP according to CSI and CoMP UE location information at each transmission point.
  • the UE performs coordinated multipoint transmission, and when the CCN is activated, sends a notification to the serving base station of the CoMP UE to trigger the CoMP UE to perform coordinated multipoint transmission.
  • the present invention also provides a transmission point, the transmission point is scheduled by the central cooperative node CCN, and includes: a reporting unit, configured to report, to the CCN, channel state information CSI of all UEs that communicate with the transmission point;
  • the CoMP resource used for CoMP UE data transmission of the coordinated multi-point transmission user terminal is determined by communicating with the CCN, the user plane data scheduling transmission of the CoMP UE is performed by using the CoMP resource, and the user plane data scheduling transmission of the non-CoMP UE is performed by using the non-CoMP resource.
  • the existing LTE-A architecture is enhanced to solve the problem of CCN in non-ideal backhaul scenarios.
  • the user data transmission processing problem when scheduling the control node helps the network side to timely and accurately implement the scheduling decision and data transmission processing for the CoMP user, and reduces the impact of the backhaul delay on the CoMP center scheduling.
  • the scheduling transmission unit performs the user plane data scheduling transmission of the CoMP UE by using the CoMP resource, and specifically includes:
  • the CoMP resource used for the CoMP UE data transmission is determined according to the scheduling information, and the MAC PDU is transmitted by using the CoMP resource on the PDSCH.
  • the CCN schedules the CoMP UE to perform coordinated multi-point transmission, where the transmission point is a service base station of the CoMP UE, and the method further includes:
  • a retransmission unit configured to schedule CoMP UE data retransmission using the current non-CoMP resource when determining that data retransmission is required according to the negative acknowledgement NACK feedback information of the CoMP UE.
  • the retransmission unit uses the current non-CoMP resource to schedule CoMP UE data retransmission, and specifically includes: scheduling, by the CCN, the CoMP UE to perform CoMP UE data retransmission at a time other than the new data transmission by the serving base station to the CoMP UE.
  • the retransmission unit is further configured to:
  • the CoMP UE retransmits the data, it is determined that the serving base station of the CCN scheduling CoMP UE performs new data transmission to the CoMP UE, and receives ACK/NACK feedback of the new data and the retransmitted data by the two HARQs respectively.
  • the CCN scheduling CoMP UE performs non-coordinated multipoint transmission, and the transmission point is a serving base station of the CoMP, and the scheduling transmission unit performs the user plane data scheduling transmission of the CoMP UE by using the CoMP resource, which specifically includes:
  • the serving base station of the CoMP determines the scheduling information, determines the CoMP resource according to the scheduling information, and generates a MAC PDU, and uses the CoMP resource transmission on the PDSCH.
  • MAC PDU uses the CoMP resource transmission on the PDSCH.
  • the transmission point is a serving base station of the CoMP, and the method further includes:
  • An attaching receiving unit configured to receive an attach request message of the CoMP UE
  • an indication unit configured to determine, when the user plane downlink data path of the SGW-CCN-CoMP UE serving base station-CoMP UE is established for the CoMP UE, to instruct the core network to establish an S1-U connection of the serving base station of the SGW-CCN-CoMP UE.
  • the indication unit instructs the core network to establish an S1-U connection of the serving base station of the SGW-CCN-CoMP UE, specifically:
  • the related information of the attach request message and the CoMP UE is sent to the CCN according to the interface between the coordinated set of the serving base station that includes the CoMP UE and the CCN, and the CCN associates the attach request message with the CoMP UE.
  • the transmission point is a serving base station of the CoMP, and the method further includes:
  • the change indication unit is configured to notify the MME to perform the user plane downlink data path switching by using the path switching process, after the CoMP UE establishes the RRC connection, and determine that the CoMP UE is triggered to perform coordinated multi-point transmission, by changing the user plane downlink data path to the SGW-CCN - The serving base station of the CoMP UE.
  • the transmission point is a serving base station of the CoMP, and the method further includes:
  • a CoMP indication unit configured to send a CoMP UE identifier and a coordinated multipoint transmission request to the CCN
  • the CoMP response receiving unit is configured to receive a coordinated multi-point transmission response of the CCN feedback.
  • the change indication unit determines to trigger the CoMP UE to perform coordinated multi-point transmission, and specifically includes: determining, according to the measurement of the CoMP UE, whether to trigger the CoMP UE to perform coordinated multi-point transmission; or determining whether to trigger according to the location information of the CoMP UE.
  • the CoMP UE performs coordinated multi-point transmission; or when the CMP UE that triggers the CCN activation is triggered to perform coordinated multi-point transmission notification, it is determined that the CoMP UE is triggered to perform coordinated multi-point transmission.
  • the method further includes:
  • an RRC switching unit configured to trigger an RRC connection between the serving base station of the CoMP UE and the COMP UE, and switch to an RRC connection between the COMP UE and the CCN.
  • Serving gateway SGW communicating with CCN at the central collaboration point, transmitting coordinated multi-point transmission user terminal to CCN CoMP
  • CCN obtains the user plane data of the CoMP UE to be transmitted from the SGW, and obtains all the data from the CCN scheduled transmission point.
  • Channel state information CSI of the UE according to the user plane data to be transmitted of the CoMP UE and channel state information of all UEs
  • the existing LTE-A architecture is enhanced, which can solve the problem of user data transmission and processing when the CCN is used as the scheduling control node in the non-ideal backhaul scenario, and helps the network side to timely and accurately implement the scheduling decision for the CoMP user. And data transmission processing, reducing the impact of backhaul delay on CoMP center scheduling.
  • the invention also provides a central collaboration node CCN, comprising:
  • a data receiving port configured to acquire, from the serving gateway SGW, user plane data to be transmitted of the coordinated multipoint transmission user terminal CoMP UE;
  • a processor configured to acquire CSI of all UEs from a transmission point scheduled by the CCN, and communicate with a CCN scheduled transmission point according to the user plane data to be transmitted of the CoMP UE and CSI of all UEs, and perform scheduling of user plane data of the CoMP UE transmission.
  • the existing LTE-A architecture is enhanced, which can solve the problem of user data transmission and processing when the CCN is used as the scheduling control node in the non-ideal backhaul scenario, and helps the network side to timely and accurately implement the scheduling decision for the CoMP user. And data transmission processing, reducing the impact of backhaul delay on CoMP center scheduling.
  • the processor communicates with the CCN scheduled transmission point, and performs scheduling transmission of the user plane data of the CoMP UE, specifically:
  • the CCN determines, according to the size of the user plane data to be transmitted of the CoMP UE and the CSI of all the UEs, the coordinated transmission point of the CoMP UE when the CoMP UE performs coordinated multi-point transmission, and generates scheduling information and media access control protocol data of the CoMP UE.
  • Unit MAC PDU
  • the CC notifies the CoMP UE of the coordinated transmission point of the generated scheduling information and MAC PDU.
  • the processor when the coordinated transmission point of the CoMP UE does not include the serving base station of the CoMP UE, the processor also notifies the serving base station of the CoMP UE of the generated scheduling information and the MAC PDU.
  • the processor does not schedule the serving base station of the CoMP UE to perform new data transmission to the CoMP UE at the time when the serving base station of the possible CoMP UE schedules the CoMP UE data retransmission; or
  • the serving base station that does not schedule the CoMP UE performs new data transmission to the CoMP UE.
  • the processor communicates with the CCN scheduled transmission point, and performs scheduling transmission of the user plane data of the CoMP UE, specifically:
  • the Bayer J J According to the size of the user plane data to be transmitted of the CoMP UE and the CSI of all UEs, when the CoMP UE performs the non-multipoint coordinated transmission, the Bayer J J:
  • the processor generates the scheduling information of the CoMP UE, and sends the generated scheduling information of the CoMP UE and the user plane data to be transmitted to the serving base station of the CoMP UE, specifically:
  • the J service base station of the CoMP UE only generates the MAC PDU by scheduling information of the CoMP UE and the part of the to-be-transmitted data, and performs single-point transmission of the CoMP UE;
  • the serving base station of the CoMP UE notifies the CCN of the identity of the transmitted data.
  • the data receiving port acquires the user plane data of the CoMP UE to be transmitted from the SGW based on the user plane downlink data path of the pre-established SGW-CCN-CoMP UE serving base station-CoMP UE.
  • the method further includes: an attach message receiving port, configured to receive an attach request message sent by the serving base station of the CoMP UE, and related information of the CoMP UE;
  • a message forwarding port configured to transmit the attach request message and the related information of the CoMP UE and the CCN related information to the mobility management entity MME, and establish an S1-MME connection of the serving base station of the MME-CCN-CoMP UE.
  • the method further includes: a notification port, configured to send, when the CCN is activated, a notification that triggers the CoMP UE to perform coordinated multi-point transmission to the serving base station of the CoMP UE; or determine, according to the CSI and CoMP UE location information of each transmission point, The CoMP UE is triggered to perform coordinated multipoint transmission, and when the CCN is activated, a notification is sent to the serving base station of the CoMP UE to trigger the CoMP UE to perform coordinated multipoint transmission.
  • a notification port configured to send, when the CCN is activated, a notification that triggers the CoMP UE to perform coordinated multi-point transmission to the serving base station of the CoMP UE; or determine, according to the CSI and CoMP UE location information of each transmission point, The CoMP UE is triggered to perform coordinated multipoint transmission, and when the CCN is activated, a notification is sent to the serving base station of the CoMP UE to trigger the CoMP UE to perform coordinated multipoint transmission.
  • the present invention also provides a transmission point, the transmission point is scheduled by the central cooperative node CCN, and includes: a reporting port, configured to report, to the CCN, channel state information CSI of all UEs that communicate with the transmission point;
  • the CoMP resource used for CoMP UE data transmission of the coordinated multi-point transmission user terminal is determined by communicating with the CCN, the user plane data scheduling transmission of the CoMP UE is performed by using the CoMP resource, and the user plane data scheduling transmission of the non-CoMP UE is performed by using the non-CoMP resource.
  • the existing LTE-A architecture is enhanced, which can solve the problem of user data transmission and processing when the CCN is used as the scheduling control node in the non-ideal backhaul scenario, and helps the network side to timely and accurately implement the scheduling decision for the CoMP user. And data transmission processing, reducing the impact of backhaul delay on CoMP center scheduling.
  • the processor performs the user plane data scheduling transmission of the CoMP UE by using the CoMP resource, and specifically includes: receiving, by the CCN, the scheduling information of the CoMP UE and the medium access control protocol data unit MAC PDU that are sent when the CoMP UE performs the coordinated multi-point transmission;
  • the CoMP resource used for the CoMP UE data transmission is determined according to the scheduling information, and the MAC PDU is transmitted by using the CoMP resource on the PDSCH.
  • the CCN schedules the CoMP UE to perform coordinated multi-point transmission, where the transmission point is a serving base station of the CoMP UE, and the method further includes: And a retransmission port, configured to use the current non-CoMP resource to schedule CoMP UE data retransmission when determining that data retransmission is required according to the negative acknowledgement NACK feedback information of the CoMP UE.
  • the retransmission port uses the current non-CoMP resource to schedule CoMP UE data retransmission, and specifically includes: scheduling, by the CCN, the CoMP UE to perform CoMP UE data retransmission at a time other than the new data transmission by the serving base station to the CoMP UE.
  • the retransmission port is further configured to:
  • the CoMP UE retransmits the data, it is determined that the serving base station of the CCN scheduling CoMP UE performs new data transmission to the CoMP UE, and receives ACK/NACK feedback of the new data and the retransmitted data by the two HARQs respectively.
  • the CCN scheduling CoMP UE performs non-coordinated multipoint transmission, and the transmission point is a serving base station of the CoMP, and the processor performs the user plane data scheduling transmission of the CoMP UE by using the CoMP resource, specifically:
  • the serving base station of the CoMP determines the scheduling information, determines the CoMP resource according to the scheduling information, and generates a MAC PDU, and uses the CoMP resource transmission on the PDSCH.
  • MAC PDU uses the CoMP resource transmission on the PDSCH.
  • the transmission point is a serving base station of the CoMP, and the method further includes:
  • An attaching receiving port configured to receive an attach request message of the CoMP UE
  • the indication port is configured to determine, when the user equipment downlink data path of the SGW-CCN-CoMP UE serving base station-CoMP UE is established for the CoMP UE, to instruct the core network to establish an S1-U connection of the serving base station of the SGW-CCN-CoMP UE.
  • the indication port instructs the core network to establish an S1-U connection of the serving base station of the SGW-CCN-CoMP UE, which includes:
  • the related information of the attach request message and the CoMP UE is sent to the CCN according to the interface between the coordinated set of the serving base station that includes the CoMP UE and the CCN, and the CCN associates the attach request message with the CoMP UE.
  • the transmission point is a serving base station of the CoMP
  • the method further includes:
  • the change indication port is configured to notify the MME to perform the user plane downlink data path switching by using the path switching process when the CoMP UE is configured to trigger the coordinated multipoint transmission after the RRC connection is established by the CoMP UE, and the downlink data path of the user plane is changed to SGW-CCN.
  • the serving base station of the CoMP UE The serving base station of the CoMP UE.
  • the transmission point is a serving base station of the CoMP, and the method further includes:
  • a CoMP indication port configured to send a CoMP UE identifier and a coordinated multipoint transmission request to the CCN
  • the CoMP response receiving port is used to receive the coordinated multi-point transmission response of the CCN feedback.
  • the change indication unit determines to trigger the CoMP UE to perform coordinated multi-point transmission, and specifically includes: determining, according to the measurement of the CoMP UE, whether to trigger the CoMP UE to perform coordinated multi-point transmission; or determining whether to trigger according to the location information of the CoMP UE.
  • the CoMP UE performs coordinated multi-point transmission; or when the CMP UE that triggers the CCN activation is triggered to perform coordinated multi-point transmission notification, it is determined that the CoMP UE is triggered to perform coordinated multi-point transmission.
  • the method further includes:
  • FIG. 1 is a schematic diagram of information interaction of a non-central scheduling
  • 2 is a schematic diagram of information exchange of central scheduling
  • FIG. 3 shows the E-UTRAN network architecture
  • FIG. 4 is a flowchart of a data transmission method for scheduling a CCN side coordinated multi-point transmission center according to an embodiment of the present invention
  • FIG. 5 is a flowchart of a data transmission method for a transmission point side coordinated multi-point transmission center scheduling according to an embodiment of the present invention
  • Embodiment 1 is a schematic diagram of establishing a downlink data path of a user plane of a serving base station of a SGW-CCN-CoMP UE.
  • FIG. 7b is a data transmission architecture diagram established after the RRC handover in Embodiment 1
  • FIG. 8 is a schematic diagram of a user plane downlink data path of a serving base station-CoMP UE that establishes a SGW-CCN-CoMP UE according to Embodiment 2 and Embodiment 3 of the present invention
  • Embodiment 9a is a data transmission architecture diagram established in Embodiment 2 of the present invention.
  • Embodiment 9b is a data transmission architecture diagram established in Embodiment 3 of the present invention.
  • Figure 10 is a schematic diagram of a heterogeneous network
  • FIG. 11 is a first structural diagram of a collaboration center node CCN according to an embodiment of the present invention.
  • FIG. 12 is a first structural diagram of a transmission point according to an embodiment of the present invention.
  • FIG. 13 is a second structural diagram of a collaboration center node CCN according to an embodiment of the present invention.
  • FIG. 14 is a second structural diagram of a transmission point according to an embodiment of the present invention.
  • the technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention.
  • the embodiments are a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
  • LTE-A long term evolution-advance
  • CoMP coordinated multi-point transmission technology
  • the implementation of CoMP technology is divided into non-central collaborative scheduling and central collaborative scheduling.
  • LTE-A Release 12 introduces a CoMP scenario with non-ideal backhaul.
  • the embodiment of the invention provides a data transmission system for coordinated multi-point transmission center scheduling, which includes:
  • the serving gateway SGW communicates with the central cooperation point CCN, and transmits the user plane data of the coordinated multi-point transmission user terminal CoMP UE to the CCN;
  • the CCN acquires the user plane data of the CoMP UE to be transmitted from the SGW, acquires the channel state information CSI of all UEs from the CCN scheduled transmission point, and schedules the CCN according to the user plane data of the CoMP UE to be transmitted and the channel state information CSI of all UEs.
  • Transmission point communication performing scheduled transmission of user plane data of the CoMP UE;
  • the CCN-scheduled transmission point reports the CSI of all UEs that communicate with the transmission point to the CCN, determines the CoMP resource used by the CoMP UE data transmission by the coordinated multi-point transmission user terminal, and performs the CoMP UE user by using the CoMP resource by communicating with the CCN.
  • the data is scheduled to be transmitted, and the non-CoMP resources are used to perform user plane data scheduling transmission of the non-CoMP UE.
  • the CoMP UE in the embodiment of the present invention refers to a CoMP-capable UE, and the CCN determines a scheduling scheme of the CoMP UE, and may schedule the CoMP UE to perform coordinated multi-point transmission, and may also schedule the CoMP UE to perform non-coordinated multi-point transmission.
  • This embodiment is called single point transmission.
  • the non-CoMP UEs in this embodiment are the UEs that do not have the CoMP capability.
  • the CoMP resources in this embodiment are specifically used to indicate the resources used by the CoMP UE to transmit. Whether the CoMP UE performs coordinated multipoint transmission.
  • each transmission point scheduled by the CCN needs to transmit the CSI information of the user terminal to the CCN, and the CCN communicates with the transmission point to perform the scheduling control function of the CoMP UE.
  • the transmission point scheduled by the CCN according to the communication with the CNN, determines the CoMP resource of the CoMP UE data transmission, and performs the user plane data scheduling transmission of the CoMP UE by using the CoMP resource, and for the non-CoMP UE, the transmission scheme determines and transmits the transmission scheme by the transmission point.
  • the following is a data transmission method for the coordinated multi-point transmission center scheduling applied to the above system in the embodiment of the present invention. As shown in FIG. 4, the method includes:
  • Step 401 The central cooperative node CCN acquires, from the serving gateway SGW, the user plane data to be transmitted of the coordinated multipoint transmission user terminal CoMP UE.
  • Step 402 The CCN acquires channel state information CSI of all UEs from its scheduled transmission point.
  • Step 403 The CCN communicates with the CCN scheduled transmission point according to the user plane data to be transmitted of the CoMP UE and the channel state information CSI of all UEs, and performs scheduling transmission of the user plane data of the CoMP UE.
  • the CCN may determine the scheduling scheme of the CoMP UE according to the user plane data to be transmitted of the CoMP UE and the channel state information CSI of all the UEs, specifically determining whether the CoMP UE performs coordinated multi-point transmission or non-multipoint coordinated transmission, for example, performing multi-point cooperation.
  • the multi-point coordinated transmission scheme is adopted.
  • the following schemes are adopted for the scheduling transmission of the user plane data of the CoMP UE:
  • CCN determines CoMP UE for coordinated multi-point transmission
  • the CCN determines, according to the size of the user plane data to be transmitted of the CoMP UE and the CSI of all the UEs, the CCN selects the coordinated transmission point of the CoMP UE, and generates the scheduling information and the medium access control protocol of the CoMP UE.
  • a data unit MAC PDU preferably, generating a MAC PDU according to a user plane to be transmitted and scheduling information of the CoMP UE;
  • the CCN notifies the CoMP UE of the coordinated transmission point of the generated scheduling information and MAC PDU.
  • the transmission path of the user plane data is SGW-CCN-Transport Point-CoMP UE.
  • the CCN In order to support the processing of the retransmission data, preferably, when the coordinated transmission point of the CoMP UE does not include the serving base station of the CoMP UE, the CCN also notifies the serving base station of the CoMP UE of the generated scheduling information and the MAC PDU.
  • the embodiment of the present invention adopts the following processing method for retransmitting data:
  • the serving base station of the CoMP UE is determined according to the negative of the CoMP UE.
  • the CoMP resource is determined according to the scheduling information of the CCN, and the CoMP UE data retransmission is scheduled by using the current non-CoMP resource.
  • the CoMP resource includes a time domain resource and a frequency domain resource.
  • the serving base station of the CoMP UE uses the current non-CoMP resource to schedule CoMP UE data retransmission, which specifically includes:
  • the serving base station of the CoMP UE uses the CCN to schedule the CoMP UE to retransmit the CoMP UE data at a time other than the new data transmission by the serving base station to the CoMP UE.
  • the transmission of new data and the transmission of retransmitted data are scheduled using different time domain resources.
  • the corresponding processing measures can also be performed on the CNN side:
  • the CCN does not schedule the serving base station of the CoMP UE to perform new data transmission to the CoMP UE at the time when the serving base station of the possible CoMP UE schedules the CoMP UE data retransmission;
  • the serving base station that does not schedule the CoMP UE performs new data transmission to the CoMP UE.
  • the serving base station of the CoMP UE retransmits the data to the CoMP UE when determining that the data retransmission is required according to the negative acknowledgement NACK feedback information of the CoMP UE; if the serving base station of the CoMP UE is to the CoMP At the same time that the UE retransmits the data, the CCN schedules the serving base station of the CoMP UE to perform new data transmission to the CoMP UE, and the serving base station of the CoMP UE receives the ACK/NACK feedback of the new data and the retransmitted data respectively through the two HARQs.
  • CCN determines CoMP UE for non-multipoint coordinated transmission
  • the CCN determines whether the CoMP UE performs non-multipoint coordinated transmission according to the size of the user plane data to be transmitted of the CoMP UE and the CSI of all UEs, and preferably adopts any of the following processing modes:
  • the processing mode 1 the CCN generates the scheduling information of the CoMP UE and the media access control protocol data unit MAC PDU, and sends the generated scheduling information and the MAC PDU to the serving base station of the CoMP UE;
  • the processing mode 2 the CCN generates scheduling information of the CoMP UE, and sends the generated scheduling information of the CoMP UE and the user plane data to be transmitted to the serving base station of the CoMP UE;
  • the CCN sends the user plane data to be transmitted and the non-cooperative transmission point identifier to the serving base station of the CoMP UE, that is, the serving base station of the CoMP UE determines the transmission mode of the CoMP UE.
  • the CCN generates scheduling information of the CoMP UE, and the scheduling information of the generated CoMP UE and the user plane data to be transmitted are sent to the serving base station of the CoMP UE, which specifically includes:
  • the CCN generates scheduling information of the CoMP UE, and sends the generated scheduling information of the CoMP UE and part of the user plane data to be transmitted to the serving base station of the CoMP UE;
  • the service base station of the CoMP UE only generates the MAC PDU by scheduling information of the CoMP UE and the part of the to-be-transmitted data, and performs single-point transmission of the CoMP UE;
  • the serving base station of the CoMP UE notifies the CCN of the identity of the transmitted data.
  • the CC sends the user plane data to be transmitted to the serving base station of the CoMP UE in a batch, and after receiving the response of the transmission success, transmits the remaining remaining part of the user plane data to be transmitted.
  • the following is a data transmission method for the coordinated multipoint transmission center scheduling applied to the above system from the transmission point side scheduled by the CCN, as shown in FIG. 5, including:
  • Step 501 The transmission point scheduled by the central cooperative node CCN reports the channel state information CSI of all UEs that communicate with the transmission point to the CCN;
  • Step 502 The transmission point determines, by using the CCN, the CoMP resource used by the coordinated multi-point transmission user terminal for the CoMP UE data transmission, performs the user plane data scheduling transmission of the CoMP UE by using the CoMP resource, and performs the non-CoMP UE user plane by using the non-CoMP resource. Data scheduling transmission.
  • the transmission point performs the user plane data scheduling transmission of the CoMP UE by using the CoMP resource, and specifically includes: receiving, by the CCN, the scheduling information of the CoMP UE and the medium access control protocol data unit MAC PDU that are sent when the CoMP UE performs coordinated multi-point transmission;
  • the CCN schedules the CoMP UE to perform coordinated multi-point transmission, where the transmission point is a service base station of the CoMP UE, and the method further includes:
  • the serving base station of the CoMP UE determines that data retransmission is required according to the negative acknowledgement NACK feedback information of the CoMP UE, and schedules CoMP UE data retransmission using the current non-CoMP resource.
  • the serving base station of the CoMP UE uses the current non-CoMP resource to schedule CoMP UE data retransmission, which specifically includes:
  • the serving base station of the CoMP UE uses the CCN to schedule the CoMP UE to retransmit the CoMP UE data at a time other than the new data transmission by the serving base station to the CoMP UE.
  • the serving base station of the CoMP UE retransmits data to the CoMP UE at the same time, it is determined that the serving base station of the CCN scheduling CoMP UE performs new data transmission to the CoMP UE, and the serving base station of the CoMP UE receives new data and weight respectively through two HARQs.
  • the ACK/NACK feedback of the transmitted data is determined that the serving base station of the CCN scheduling CoMP UE performs new data transmission to the CoMP UE, and the serving base station of the CoMP UE receives new data and weight respectively through two HARQs.
  • the CCN scheduling CoMP UE performs non-coordinated multipoint transmission
  • the transmission point is a serving base station of the CoMP
  • the transmission point performs the user plane data scheduling transmission of the CoMP UE by using the CoMP resource, which specifically includes:
  • the serving base station of the CoMP determines the scheduling information, determines the CoMP resource according to the scheduling information, and generates a MAC PDU, and uses the CoMP resource transmission on the PDSCH.
  • MAC PDU uses the CoMP resource transmission on the PDSCH.
  • the CCN of the present invention acquires the user plane data to be transmitted of the CoMP UE from the SGW based on the user plane downlink data path of the pre-established SGW-CCN-CoMP UE serving base station-CoMP UE.
  • the user plane downlink data path of the serving base station-CoMP UE of the SGW-CCN-CoMP UE is established for the CoMP UE; or after the CoMP UE establishes the RRC connection,
  • the path change mode is that the CoMP UE establishes a user plane downlink data path of the serving base station-CoMP UE of the SGW-CCN-CoMP UE.
  • a preferred embodiment of the user plane downlink data path of the serving base station-CoMP UE of the pre-established SGW-CCN-CoMP UE is given below with reference to the embodiment.
  • the user plane downlink data path of the serving base station-CoMP UE of the SGW-CCN-CoMP UE is established for the CoMP UE in the initial RRC connection establishment process of the CoMP UE, including:
  • the serving base station of the CoMP UE receives the attach request message of the CoMP UE;
  • the serving base station of the CoMP UE determines that the CoMP UE establishes the user plane downlink data path of the SGW-CCN-CoMP UE serving base station-CoMP UE, it instructs the core network to establish an S1-U connection of the serving base station of the SGW-CCN-CoMP UE.
  • the serving base station of the CoMP UE sends the attach request message and the related information of the CoMP UE to the CCN through an interface with the CCN according to the mapping relationship between the stored cooperative set of the serving base station including the CoMP UE and the CCN;
  • the CC transmits the attach request message and the related information of the CoMP UE and the CCN related information to the mobility management entity MME, and establishes an S1-MME connection of the serving base station of the MME-CCN-CoMP UE;
  • the MME triggers the establishment of an S1-U connection of the serving base station of the SGW-CCN-CoMP UE.
  • Non-access stratum of the UE The NAS layer initiates an attach request attach request message, and the NAS message triggers the initial R C connection process after reaching the RRC layer of the UE.
  • the UE sends the NAS message of the attach request to the serving eNB in an RRC setup complete message returned to the serving eNB.
  • the attach request message includes the UE related information, including the IMSK International Mobile Subscriber Identity, the international mobile subscriber identity code, and the UE core network capability.
  • the UE also needs to report the UE wireless network capability, that is, whether the UE supports collaboration. Multi-point transmission capability.
  • the serving eNB After receiving the Attach request, the serving eNB learns that the UE has the capability of supporting CoMP transmission.
  • the serving eNB is determined according to the CoMP support capability of the UE, the current network support capability of the CoMP, and the network side policy. Whether the user plane transmission path of the CoMP UE is established as the serving base station of the SGW-CCN-CoMP UE - CoMP UE, if yes, step 3) is performed, and if not, the user plane path is established according to the existing protocol.
  • the path connection is established according to the serving base station-CoMP UE of the SGW-CCN-CoMP UE, specifically, the mapping relationship between the serving eNB and the CCN according to the stored cooperation set (including the serving eNB, the cell node, etc.)
  • the Attach request message and the UE related information are sent to the CCN through the interface with the CCN.
  • the UE related information includes a CSG (Close Subscriber Group) access mode, a CSG ID, a TAI (Tracking Area Identity), and the like, and the message for transmitting the information may be specifically for the CoMP function.
  • the new X2AP process message defined may also be a message for the existing X2AP protocol process to be extended for CoMP.
  • the CCN After receiving the information notified by the serving eNB, the CCN considers that the CoMP UE cooperates with the multi-point transmission function, and transmits the attach request message and the related information of the CoMP UE and the CCN related information to the MME, thereby establishing the MME-CCN- The S1-MME connection of the serving base station of the CoMP UE.
  • the CCN related information includes: ECGI (EUTRAN Cell Global Identity), and the ECGI is composed of a PLMN (Public Land Mobile Network, a public land mobile network, and a CCN ID corresponding cell identifier, Cell Identity).
  • PLMN Public Land Mobile Network
  • CCN ID corresponding cell identifier
  • the CCN transmits the above information to the MME through an S 1 -MME control message.
  • the MME triggers the establishment of the S1-U connection of the serving base station of the SGW-CCN-CoMP UE, and the implementation is the same as the existing protocol.
  • the data transmission architecture established by the embodiment of the present invention is:
  • the user plane data transmission path of the CoMP UE is: S-GW ⁇ ->CCN ⁇ -> serving base station ⁇ ->UE;
  • CoMP UE The control plane data transmission path is: MME ⁇ -> CCN ⁇ -> serving base station ⁇ -> UE;
  • the scheduling information transmission path between the CCN and the coordinated transmission point is: CCN - each coordinated transmission point.
  • the subsequent serving eNB may trigger the handover process as needed, for example, in a scenario where the bearer separation is supported and the CCN node is a macro base station.
  • the RRC connection between the CoMP UE and the network side serving eNB is switched to the RC connection between the COMP UE and the CCN.
  • the data transmission architecture is as shown in FIG. 7b, and the specific handover process is an existing process, which is not described in detail herein.
  • the RRC signaling is sent by the CCN to the UE.
  • the data transmission is performed by using the data transmission of the cooperative multi-point transmission center according to the above embodiment of the present invention based on the above data transmission architecture, and will not be repeated here.
  • the eNB selects according to the CoMP UE capability.
  • the CC is the transmission transit point of the CoMP UE and the core network, and establishes the user plane downlink data path of the serving base station-CoMP UE of the SGW-CCN-CoMP UE for the CoMP UE.
  • the serving base station of the CoMP UE sends a message including the ETURAN cell global identifier ECGI corresponding to the CCN to the MME, and notifies the MME to switch the user plane connection between the SGW and the CCN;
  • the MME triggers the establishment of the S1-U connection of the serving base station of the SGW-CCN-CoMP UE according to the notification.
  • the non-access stratum of the UE The NAS layer initiates an attach request attach request message, and the NAS message triggers the initial RRC connection process after reaching the RRC layer of the UE.
  • the UE sends the NAS message of the attach request to the serving eNB in an RRC setup complete message returned to the serving eNB.
  • the attached request message includes the UE related information, including the IMSI (International Mobile Subscriber Identity), the UE core network capability, and the UE core network Capability.
  • the UE also needs to report the UE wireless network capability, that is, whether the UE supports the Collaborative multi-point transmission capability.
  • the serving eNB After receiving the Attach request, the serving eNB knows that the UE has the capability of supporting CoMP transmission. The serving eNB determines whether the user plane transmission path of the CoMP UE is the serving base station of the SGW-CCN-CoMP UE-CoMP UE according to the CoMP support capability of the UE, the current network support capability of the CoMP, and the network side policy, and if so, Step 3) is performed, and if not, the user plane path is established according to the existing protocol.
  • the serving eNB sends a message including the ETURAN cell global identity ECGI corresponding to the CCN to the MME, and notifies the MME to switch the user plane connection between the SGW and the CCN;
  • the MME is notified that the S1 user plane is switched between the SGW and the CCN, and the S1-MME remains between the eNB and the MME.
  • the S1-MME control message needs to include a CCN ECGI, and a user plane handover indication.
  • the MME triggers the SGW to perform S1-U conversion.
  • the MME replaces the ETURAN cell global identifier ECGI corresponding to the CCN, and replaces the ECGI corresponding to the serving base station of the CoMP UE, and notifies the SGW, and the subsequent execution process is the same as the existing protocol, and then the SGW is established.
  • ECGI ETURAN cell global identifier
  • the method further includes: the MME notifying the CCN that the coordinated multipoint transmission function of the CoMP UE is activated.
  • the subsequent serving eNB may trigger the handover process according to the requirement, and connect the CoMP UE to the RRC of the network side serving eNB, and switch.
  • the specific handover process is an existing process, and will not be described in detail herein.
  • the RRC signaling is sent by the CCN to the UE.
  • the data transmission is performed by using the data transmission of the cooperative multi-point transmission center according to the above embodiment of the present invention based on the above data transmission architecture, and will not be repeated here.
  • the MME selects the CCN as the transmission transit point of the CoMP UE and the core network according to the CoMP UE capability, and establishes the serving base station of the SGW-CCN-CoMP UE for the CoMP UE. Face down data path.
  • the serving base station of the CoMP UE receives the attach request message of the CoMP UE;
  • the serving base station of the CoMP UE sends the received attach request message and related information of the CoMP UE to the mobility management entity MME;
  • the MME determines the EUTRAN cell corresponding to the CC according to the mapping relationship between the coordinated set of the serving base station including the CoMP UE and the CCN.
  • the global identity ECGI replaces the ECGI corresponding to the serving base station of the CoMP UE and notifies the SGW.
  • the non-access stratum of the UE The NAS layer initiates an attach request attach request message, and the NAS message triggers the initial RRC connection process after reaching the RRC layer of the UE.
  • the UE sends the NAS message of the attach request to the serving eNB in an RRC setup complete message returned to the serving eNB.
  • the attach request message includes the UE related information, including the IMSK International Mobile Subscriber Identity, the international mobile subscriber identity code, and the UE core network capability.
  • the UE also needs to report the UE wireless network capability, that is, whether the UE supports collaboration. Multi-point transmission capability.
  • the serving eNB After receiving the Attach request, the serving eNB sends the received attach request message and related information of the CoMP UE to the MME;
  • the related information of the CoMP UE includes: CSG access mode, CSG ID, TAI+ECGI, and the like.
  • the serving eNB transmits the above information to the MME through an S1-MME control message.
  • the MME learns that the UE supports the coordinated multi-point transmission capability according to the S1-MME control message sent by the eNB, and determines whether the user plane transmission path of the CoMP UE is established as SGW-CCN according to the current network support capability of the CoMP and the network side policy.
  • - transmission point - UE if yes, perform step 4), if no, follow the existing protocol.
  • the MME replaces the ETURAN cell global identifier ECGI corresponding to the CCN in the process of creating a session request create session request according to the stored mapping relationship between the cooperative set of the serving base station including the CoMP UE and the CCN (such as the OAM configuration notification).
  • the ECGI corresponding to the serving base station of the CoMP UE is notified to the SGW, and the subsequent execution process is the same as the existing protocol, and then the S1-U connection of the serving base station of the SGW-CCN-CoMP UE is established.
  • the MME may also switch the control plane data path to MME ⁇ -> CCN ⁇ -> monthly service base station ⁇ -> UE.
  • the data transmission architecture established by the embodiment of the present invention is:
  • the user plane data transmission path of the CoMP UE is: S-GW ⁇ ->CCN ⁇ -> serving base station ⁇ ->UE;
  • CoMP UE The control plane data transmission path is: MME ⁇ -> CCN ⁇ -> serving base station ⁇ -> UE;
  • the scheduling information transmission path between the CCN and the coordinated transmission point is: CCN - each coordinated transmission point.
  • the method further includes: the MME notifying the serving base station that the serving base station user plane downlink data path is a serving base station of the SGW-CCN-CoMP UE;
  • the MME notifies the CCN that the coordinated multipoint transmission function of the CoMP UE is activated, and the user plane downlink data path is the serving base station of the SGW-CCN-CoMP UE.
  • the subsequent MME may send a control plane path change indication message to notify the eNB/CCN control plane that the path is changed to MME ⁇ ->CCN ⁇ ->serving base station ⁇ ->UE, and the CCN receives/transmits the control plane information with the core network.
  • the subsequent serving eNB may trigger the handover process according to the requirement, and connect the CoMP UE to the RRC of the network side serving eNB, and switch.
  • the specific handover process is an existing process, and will not be described in detail herein.
  • the RRC signaling is sent by the CCN to the UE.
  • the data transmission is performed by using the data transmission of the cooperative multi-point transmission center according to the above embodiment of the present invention based on the above data transmission architecture, and will not be repeated here.
  • This embodiment provides a specific implementation manner of establishing a user plane downlink data path of a serving base station-CoMP UE of a SGW-CCN-CoMP UE by using a path change manner after the CoMP UE establishes an RRC connection.
  • the serving base station of the CoMP UE determines to trigger the CoMP UE to perform the coordinated multi-point transmission, and notifies the MME to perform the user plane downlink data path switching by using the path switching process; the MME changes the user plane downlink data path to the SGW according to the notification.
  • the serving base station of the CCN-CoMP UE The serving base station of the CCN-CoMP UE. Specifically, the MME replaces the ECGI corresponding to the serving base station of the CoMP UE and notifies the ECGI corresponding to the CoMP UE in the process of creating a session request create session request according to the stored mapping relationship between the cooperative set of the serving base station including the CoMP UE and the CCN.
  • the subsequent execution process is the same as the existing protocol, and then the S1-U connection of the serving base station of the SGW-CCN-CoMP UE is established.
  • the MME may also choose to switch the control plane data path to MME ⁇ ->CCN ⁇ -> serving base station ⁇ ->UE, or select S1-MME to remain between e B and MME.
  • the serving base station of the CoMP UE determines to trigger the CoMP UE to perform coordinated multi-point transmission, in any of the following manners:
  • the serving base station of the CoMP UE determines whether to trigger the CoMP UE to perform coordinated multi-point transmission according to the measurement report of the CoMP UE;
  • the CoMP UE is initially connected to the network by the serving base station. After the CoMP UE accesses the network, the serving base station configures the UE to perform measurement. When the serving base station determines that the UE needs to perform coordinated multi-point transmission according to the measurement report of the UE, it triggers a Path Switch Request process with the MME, and notifies the MME to change the transmission path endpoint. CCN.
  • the serving base station of the CoMP UE determines, according to the location information of the CoMP UE, whether to trigger the CoMP UE to perform coordinated multipoint transmission;
  • the CoMP UE When the serving base station of the CoMP UE determines that the CoMP UE is in the overlapping area of the coordinated cell, the CoMP UE is triggered to perform coordinated multi-point transmission.
  • the CMP triggers the CoMP UE to perform coordinated multi-point transmission, and the serving base station of the CoMP UE receives the trigger sent by the CCN when the CoMP UE performs the coordinated multi-point transmission notification, and determines to trigger the CoMP UE to perform coordinated multi-point transmission.
  • a notification is sent to the serving base station of the CoMP UE to trigger the coordinated multipoint transmission of the CoMP UE, and the serving base station of the CoMP UE exchanges information such as CSI after receiving the notification, and triggers a path switch request process, etc.;
  • the CC determines whether to trigger the CoMP UE to perform coordinated multipoint transmission according to the CSI and CoMP UE location information reported by each transmission point. When the judgment is yes, and the CCN is activated, the CCN sends a trigger CoMP UE to the serving base station of the CoMP UE to perform coordinated multipoint. Notification of transmission.
  • the serving base station of the CoMP UE sends the CoMP UE identity and the coordinated multipoint transmission request to the CCN;
  • the CCN After receiving the notification from the serving base station of the CoMP UE, the CCN feeds back the UE CoMP transmission response information to the serving base station of the CoMP UE, and the serving base station of the CoMP UE receives the coordinated multi-point transmission response fed back by the CCN.
  • Base station - User plane downlink data path of the CoMP UE It is similar to the activation process and will not be described here.
  • the target serving base station of the CoMP UE After the RRC connection is established by the CoMP UE, the target serving base station of the CoMP UE notifies the MME to perform the user plane downlink data path switching by using the path switching process during the cell handover.
  • the MME changes the user plane downlink data path to the serving base station of the SGW-CCN-CoMP UE according to the notification. Specifically, the MME replaces the ECGI corresponding to the serving base station of the CoMP UE and notifies the ECGI corresponding to the CoMP UE in the process of creating a session request create session request according to the stored mapping relationship between the cooperative set of the serving base station including the CoMP UE and the CCN.
  • the subsequent execution process is the same as the existing protocol, and then the S1-U connection of the serving base station of the SGW-CCN-CoMP UE is established.
  • the MME may also choose to switch the control plane data path to MME ⁇ ->CCN ⁇ -> serving base station ⁇ ->UE, or select S1-MME to remain between e B and MME.
  • the data transmission architecture established by the embodiment of the present invention is:
  • the user plane data transmission path of the CoMP UE is: S-GW ⁇ ->CCN ⁇ -> serving base station ⁇ ->UE; control plane data transmission path of the CoMP UE
  • the scheduling information transmission path between the CCN and the coordinated transmission point is: CCN-each coordinated transmission point.
  • the subsequent serving eNB may trigger the handover process according to the requirement, and connect the CoMP UE to the RRC of the network side serving eNB, and switch.
  • the specific handover process is an existing process, and will not be described in detail herein.
  • the RRC signaling is sent by the CCN to the UE.
  • the data transmission is performed by using the data transmission of the cooperative multi-point transmission center according to the above embodiment of the present invention based on the above data transmission architecture, and will not be repeated here.
  • the CCN and the serving base station of the CoMP UE are the same node, and the user-side downlink data path of the serving base station-CoMP UE of the SGW-CCN-CoMP UE is pre-established, including:
  • the original serving base station of the CoMP UE initiates a handover procedure when the CoMP UE performs coordinated multipoint transmission, and switches the serving base station of the CoMP UE to the CCN.
  • This method is mainly applicable to the case where the CCN is an independent base station and provides wide coverage.
  • the CoMP UE is initially connected to the network by the serving base station. After the CoMP UE accesses the network, the serving base station configures the UE to perform measurement. When the serving base station determines that the UE needs to perform coordinated multi-point transmission according to the measurement report of the UE, the UE performs a handover process of the UE and switches it to work under the CCN. Alternatively, the serving base station may also trigger the handover of the CoMP UE to the CCN when the UE determines that the UE needs to perform coordinated multi-point transmission according to the UE location information (eg, in the coordinated cell overlap region).
  • the serving base station may also trigger the handover of the CoMP UE to the CCN when the UE determines that the UE needs to perform coordinated multi-point transmission according to the UE location information (eg, in the coordinated cell overlap region).
  • the CMP may be triggered by the CCN to perform coordinated multipoint transmission, and the original serving base station of the CoMP UE receives the trigger sent by the CCN when the CoMP UE performs the coordinated multipoint transmission notification, and then switches to the CCN to work.
  • the CCN sends a notification to the serving base station of the CoMP UE to trigger the coordinated multipoint transmission to the serving base station of the CoMP UE; or the CCN determines to trigger the CoMP UE according to the CSI and CoMP UE location information reported by each transmission point.
  • the CCN sends a notification to the serving base station of the CoMP UE to trigger the coordinated multipoint transmission of the CoMP UE.
  • the coordinated de-energized coordinated multi-point transmission function may also trigger the handover process to switch the CoMP UE to the serving base station of the original CoMP UE, where Let me repeat.
  • the CCN is the serving base station of the CoMP UE, and then the CCN performs scheduling control (including transmission point selection, PRB resource selection) and packet transmission by the CoMP UE.
  • scheduling control including transmission point selection, PRB resource selection
  • packet transmission by the CoMP UE For the specific scheduling transmission method, refer to the foregoing embodiment, and details are not described herein again.
  • a macro base station (Marco eNB) can provide basic coverage, and a low-power local node (Local eNB/Small cell) provides small coverage within the coverage of the macro base station, as shown in FIG. 10, where low power
  • the local node may be an RN (Relay Node), a HeNB (Home eNodeB, a Home Base Station), a Pico cell base station, or the like.
  • the UE's mobility may cause the UE to perform between the cooperative nodes under the CCN service scope. Switch frequently and increase the switching signaling overhead.
  • a detailed implementation manner of a data transmission method for cooperative multi-point transmission center scheduling based on a user plane data path of a serving base station of a SGW-CCN-CoMP UE is given below.
  • This scheme is applicable to all CoMP transmission technologies (DPS/DPB, CS/CB, JT). This embodiment is only an example of CS/CB transmission.
  • eNB1, eNB2, e B3 are cooperative base stations under the CCN.
  • UE1 CoMP UE, base station 1 and base station 3 in the measurement set
  • UE2's serving base station is eNB1
  • UE3 CoMP UE, measurement set includes base station 2 and base station 3
  • UE4's serving base station is e B2, UE5 service
  • the base station is eNB3.
  • Non-CoMP user terminals that are not marked as CoMP user terminals.
  • Each base station transmits CSI information of all UEs and data to be transmitted to the CCN through backhaul, and the CCN acquires the user planes of the CoMP UEs to be transmitted from the SGW.
  • the UE sends CSI information to its serving base station (prior art); each base station in the coordinated set (ie, a set of base stations that are centrally scheduled by one CCN) receives the CSI report of the UE, and transmits each UE to the CCN through the backhaul.
  • Channel information The channel information of any one of the UEs that the base station transmits to the CCN may include the CSI reported by the UE, and may also include the CSI information statistic obtained based on the CSI of the user terminal.
  • the CCN node can be pre-configured by the OAM, such as the Macro eNB in the inter-frequency scenario as the CCN. After the CCN selects the CCN, the CCN node information is notified to each base station in the CCN management area, or may be determined by each base station in a certain area, if each base station in a certain area selects a base station that provides wide coverage, or The base station with strong scheduling/data computing capability is a CCN node.
  • Step 2) The CCN determines the scheduling information according to the CSI information of all UEs on the cooperative base station, the amount of data to be transmitted by the user terminal, and notifies the coordinated base station of the scheduling information.
  • the CC receives the channel information of each serving user terminal transmitted by each coordinated base station in the cooperative set, according to all user information in the cooperation set, and the data volume information of the COMP UE to be transmitted (CCN is the data transmission transit point of the CoMP UE, CCN knows CoMP)
  • CCN is the data transmission transit point of the CoMP UE, CCN knows CoMP
  • the specific data to be transmitted of the UE, and the information about the data to be transmitted of the non-CoMP UE determine the scheduling scheme of the CoMP UE, and when determining the scheduling of the CoMP UE, notify the coordinated base station of the scheduling information by backhaul .
  • the CCN is the transmission point selected by the CoMP UE and the resources (MCS, PRB location, PRB number, etc.) of each CoMP UE, these resources may be valid in one cycle or may be valid until the next rescheduling.
  • the CCN schedules the CS/CB transmission under the eNB1 for the UE1 according to the CSI and the data volume information to be transmitted (the specific scheduling information also includes the MCS level 6, the PRB number is 3, the PRB index is 0 ⁇ 2, and the packet MAC PDU1 is grouped).
  • e B3 performs interference avoidance; schedules eNB2 single-point transmission for UE3 (specific scheduling information also includes MCS level 3, PRB number is 1, PRB index is 5, and packet MAC PDU2 is grouped).
  • the CC notifies the UE1 identifier, the scheduling information of the UE1, and the MAC PDU1 of the UE1 to the eNB1, and simultaneously obtains the interference state information of the cooperative base station of the interference avoidance (such as the identifier of the eNB3 indicating that the CS/CB transmission is interfered with).
  • the CC is notified to the eNB1; the CC notifies the eNB2 of the UE3 identifier, the single point transmission scheduling information for the UE3, and the MAC PDU2 of the UE3; the CCN notifies the eNB3 of the available precoding matrix set for avoiding interference to the UE1 CS/CB transmission under the eNB1.
  • Step 3 The cooperative base station receives the scheduling information of the CCN notification through the backhaul, and performs scheduling transmission of the CoMP UE and the non-CoMP UE according to the notification of the CCN.
  • the eNB eNB2 and the e B3 respectively receive the scheduling information of the CCN through the backhaul, and perform scheduling according to the scheduling information.
  • the eNB 1 determines the scheduling user UE1 CS/CB transmission and corresponding scheduling resource information according to the UE identifier notified by the CCN, the UE scheduling information, and the MAC PDU1 of the UE that the CCN interacts with, generates PDSCH resource mapping information, and uses the CoMP resource to transmit the MAC on the PDSCH.
  • the PDU1; eNB1 is determined as the interference avoidance base station according to the eNB identity in the interference state information, and the information such as the precoding matrix of the transmission is calculated according to the CSI information recently reported by the UE1; at the same time, the eDI generates the NDI information of the corresponding data, the HARQ process number, The redundancy version number, the PDSCH resource mapping information, and the like, generate a CS/CB transmission of the PDCCH scheduling UE1. On a PRB resource other than the PRB index of 0 to 2, the eNB1 may schedule the UE2 to perform non-CoMP transmission according to the CSI information recently reported by the UE2.
  • the e B2 determines, according to the UE identifier, the UE scheduling information, and the MAC PDU2 of the UE3 that is communicated by the CCN, to schedule the UE3 to perform single-point transmission and scheduling resource information, and to generate the PDSCH resource mapping information, and calculate the pre-transmission according to the CSI recently reported by the UE3.
  • Information such as a coding matrix; eNB2 generates NDI information corresponding to MAC PDU2, HARQ process number, redundancy version number, PDSCH resource mapping information, and the like, and generates a PDCCH.
  • the eNB2 selects the non-CoMP transmission schedule of the UE 4 according to the CSI recently reported by the UE4.
  • e B3 performs scheduling according to the CSI recently reported by UE5, and does not use the precoding matrix other than the available precoding matrix set to schedule non-CoMP transmission of UE5.
  • Step 4) UE ACK/NACK feedback and retransmission.
  • the UE feeds back the ACK/NACK information to the respective serving base station.
  • the serving base station determines that retransmission is needed according to the ACK/NACK feedback
  • the CoMP UE data retransmission is scheduled by using the non-CoMP resource at the current moment. That is, the CCN performs only the initial transmission scheduling of the CoMP UE, and the serving base station performs the retransmission scheduling of the CoMP UE.
  • the CCN needs to transmit the MAC PDU to the serving base station of the UE when notifying the MAC PDU initially transmitted by the coordination point. .
  • the UE is required to have two HARQ processes in the same subframe of the serving cell ( HARQ process extension, increase UE) Corresponding to the number of HARQ processes in a cell).
  • the serving base station may also decide whether to perform retransmission scheduling of the UE according to whether the CCN schedules data transmission of the CoMP UE at a possible retransmission time.
  • the transmission point selection of the CCN is restricted, that is, the CCN is restricted from being scheduled by the CCN at the time of possible CoMP UE retransmission, until the ACK feedback of the data transmission by the serving base station is received.
  • each coordinated base station is configuration 1.
  • the eNB l schedules the CS/CB data initial transmission of the UE1 and the non-CoMP transmission of the UE2 in the radio frame 1 subframe 0, and the e B2 schedules the single-point transmission of the UE3 in the subframe 0, UE4 non-CoMP transmission, eNB3 schedules UE5 non-CoMP transmission in subframe 0, and feeds A/N to the serving base station in subframe 7 UE,
  • the UE1 feeds back the NACK to the eNB1, and the UE4 feeds back the ACK to the eNB2, and the other UEs feed back the ACK to the respective serving base station.
  • the eNB1 may schedule the retransmission of the UE1 (using the non-CoMP UE scheduling retransmission) using the non-CoMP resource at the moment in the subframe 1 of the radio frame 2, and the e B2 may use the subframe 1 in the radio frame 2, The non-CoMP resource at the moment schedules the retransmission of UE4. Further, in order to prevent the CCN and the eNB1 from scheduling the UE1 to perform new data transmission and retransmission in the subframe 1 of the radio frame 2, the eNB1 may select other available downlink resources, such as the radio frame 2, in the CC scheduling UE1 for new data transmission. The sub-frame 4/5/6, etc., performs retransmission scheduling of UE1.
  • This embodiment provides a detailed implementation manner of a data transmission method for cooperative multi-point transmission center scheduling based on a user plane data path of a serving base station of an SGW-CCN-CoMP UE.
  • This scheme is applicable to all CoMP transmission technologies (DPS/DPB, CS/CB, JT). This embodiment is only an example of CS/CB transmission.
  • the CC multi-point transmission scheduling scheme for the CoMP UE is the same as that of Embodiment 6, but the CoMP UE's single-point transmission scheduling manner is different from that of Embodiment 6.
  • the single point transmission of the CoMP UE is scheduled and transmitted by the serving base station. The specific differences are as follows:
  • the CCN selects and schedules a CoMP UE (such as UE3 under e B2) for single point transmission according to the CSI and the amount of data to be transmitted.
  • the CCN notifies the serving base station eNB2 of the UE3 identity and the single point transmission scheduling indication, and notifies the eNB2 of the part of the data to be transmitted corresponding to the UE3 (the notified data volume size may be estimated by the maximum scheduling resource).
  • the eNB2 learns the CC notification, determines the MCS, the PRB location, the number of PRBs, and the packet MAC PDU according to the latest CSI and other information reported by the UE3, and schedules the UE3 to perform single-point transmission.
  • e B2 informs the CCN of the data end identifier of the transmitted data after the packet MAC PDU.
  • the CCN does not schedule the data transmission of the UE3, thereby preventing data reception from being out of order and unable to restore data.
  • the foregoing embodiment of the present invention provides a data transmission method for cooperative multi-point transmission center cooperative scheduling in a non-ideal backhaul scenario between base stations, which reduces the impact of backhaul delay on CoMP center scheduling.
  • the method enhances the existing LTE-A architecture, and can solve the problem of user data transmission and processing when the CCN is used as the scheduling control node in the non-ideal backhaul scenario, and helps the network side to timely and accurately implement the scheduling decision for the CoMP user.
  • Data transmission processing reduces the impact of backhaul delay on CoMP center scheduling.
  • the CCN is the data transit point of the CoMP UE and the core network
  • the path of the user plane downlink data of the CoMP UE is the serving base station-UE of the SGW-CCN-CoMP UE.
  • the serving eNB of the UE learns the CoMP UE type. If the UE supports the CoMP transmission, the eNB determines whether the UE supports the CoMP support capability, the current network support capability of the CoMP, and the network side policy.
  • the RAN (Radio Access Network) user plane anchor point of the core network is connected to the CCN; or the user plane anchor point is established in the serving eNB by using the prior art, and the CoMP UE coordinated multipoint transmission may be triggered.
  • the data transmission anchor is changed to CCN by a process such as switching, path switching request, and path switch request.
  • control plane anchor point is still the serving eNB of the UE; or the control plane path may be changed to the MME-CCN-UE to reduce the handover overhead.
  • the A/N feedback information of the CoMP UE is suspended on the base station side, and the CCN does not perform scheduling and processing on the retransmission of the CoMP UE.
  • the CoMP UE serving base station is selected as the data retransmission scheduling transmission node of the UE.
  • the CCN selects the cooperating base station outside the serving base station as the transmission point of the CoMP UE, the CCN needs to notify the serving base station of the scheduling information of the CoMP UE when scheduling the CoMP UE new data transmission.
  • the generated MAC PDU needs to be simultaneously sent to the serving base station of the UE.
  • the CCN or the serving base station may schedule the single point transmission of the CoMP UE, that is, the non-CoMP transmission; when the serving base station schedules the single point transmission of the CoMP UE, the CCN needs to notify part of the to-be-transmitted data to the serving base station; the serving base station according to the CCN
  • the notified data information and the acquired scheduling information are subjected to a single point transmission scheduling of the CoMP UE, and after the group MAC PDU is assembled, the data eNB identifier of the transmitted data needs to be notified to the CCN.
  • the CCN may be an independent logical function entity, or may be located in a base station, or may be a base station.
  • the embodiment of the present invention further provides a data transmission apparatus for cooperative multi-point transmission center scheduling, and the principle of solving the problem is similar to the data transmission method of a coordinated multi-point transmission center scheduling, so
  • the implementation of the device can be referred to the implementation of the method, and the repeated description will not be repeated.
  • the central collaboration node CCN provided by the embodiment of the present invention, as shown in FIG. 11, includes:
  • the data receiving unit 101 is configured to acquire, from the serving gateway SGW, the user plane data to be transmitted of the coordinated multipoint transmission user terminal CoMP UE;
  • the channel information acquiring unit 102 is configured to acquire channel state information CSI of all UEs from the transmission point scheduled by the CCN, and the scheduling unit 103 is configured to perform scheduling with the CCN according to the user plane data to be transmitted of the CoMP UE and the channel state information CSI of all UEs.
  • the transmission point communication performs scheduling transmission of the user plane data of the CoMP UE.
  • the CCN includes a communication module for communicating with other nodes and a central processing module for information processing on the hardware.
  • the channel information acquisition unit is implemented by a communication module, and a functional part of the scheduling unit that is in communication with other nodes is implemented by the communication module. Other functional parts are implemented by the central processing module.
  • the CC notifies the CoMP UE of the coordinated transmission point of the generated scheduling information and MAC PDU.
  • the scheduling unit when the coordinated transmission point of the CoMP UE does not include the serving base station of the CoMP UE, the scheduling unit also notifies the serving base station of the CoMP UE of the generated scheduling information and the MAC PDU.
  • the scheduling unit does not schedule the serving base station of the CoMP UE to perform new data transmission to the CoMP UE at the time when the serving base station of the possible CoMP UE schedules the CoMP UE data retransmission; or
  • the serving base station that does not schedule the CoMP UE performs new data transmission to the CoMP UE.
  • the scheduling unit communicates with the CCN scheduled transmission point, and performs scheduling transmission of the user plane data of the CoMP UE, specifically:
  • the Bayer J J According to the size of the user plane data to be transmitted of the CoMP UE and the CSI of all UEs, when the CoMP UE performs the non-multipoint coordinated transmission, the Bayer J J:
  • the user plane data to be transmitted and the non-cooperative transmission point identifier are sent to the serving base station of the CoMP UE.
  • the scheduling unit generates scheduling information of the CoMP UE, and the scheduling information of the generated CoMP UE and the user plane data to be transmitted are sent to the serving base station of the CoMP UE, which specifically includes:
  • the CC generates scheduling information of the CoMP UE, and sends the generated scheduling information of the CoMP UE and part of the user plane data to be transmitted to the serving base station of the CoMP UE;
  • the monthly good base station of the CoMP UE generates a MAC PDU according to the scheduling information of the CoMP UE and part of the data to be transmitted, and performs a single point transmission of the CoMP UE;
  • the serving base station of the CoMP UE notifies the CCN of the identity of the transmitted data.
  • the data receiving unit acquires the user plane data of the CoMP UE to be transmitted from the SGW based on the user plane downlink data path of the pre-established SGW-CCN-CoMP UE serving base station-CoMP UE.
  • the method further includes: an attach message receiving unit, configured to receive an attach request message sent by the serving base station of the CoMP UE, and related information of the CoMP UE;
  • a message forwarding unit configured to transmit the attach request message and the related information of the CoMP UE and the CCN related information to the mobility management entity MME, and establish an S1-MME connection of the serving base station of the MME-CCN-CoMP UE.
  • the above attached message receiving unit and message forwarding unit are implemented by a communication module in the CCN.
  • the method further includes: a notification unit, configured to send, when the CCN is activated, a notification that triggers the CoMP UE to perform coordinated multi-point transmission to the serving base station of the CoMP UE; or determine, according to the CSI and CoMP UE location information of each transmission point, The CoMP UE is triggered to perform coordinated multipoint transmission, and when the CCN is activated, a notification is sent to the serving base station of the CoMP UE to trigger the CoMP UE to perform coordinated multipoint transmission.
  • the functional part of the above notification unit that is involved in communication with other nodes is implemented by the communication module of the CCN, and the other functional parts are implemented by the central processing module of the CCN.
  • the embodiment of the present invention further provides a transmission point, which is scheduled by the central cooperative node CCN, as shown in FIG. 12, and includes:
  • the upper unit 201 is configured to report channel state information CSI of all UEs that communicate with the transmission point to the CCN, and the scheduling transmission unit 202 is configured to determine, by using the CCN, the CoMP UE data transmission use by the coordinated multipoint transmission user terminal.
  • the CoMP resource performs the user plane data scheduling transmission of the CoMP UE by using the CoMP resource, and performs the user plane data scheduling transmission of the non-CoMP UE by using the non-CoMP resource.
  • the foregoing transmission point may include a base station, a relay node (Relay), where the base station includes a macro base station (Macro), a micro base station (Micro), a pico base station (Pico), a home base station or a femto base station (Femto), and the like.
  • APs wireless access points
  • the transmission point includes a communication module for communicating with other nodes and a central processing module for information processing on the hardware, and the reporting unit is implemented by the communication module, and the functional part of the scheduling transmission unit that communicates with other nodes is implemented by the communication module. Other functional parts are implemented by the central processing module.
  • the scheduling transmission unit performs the user plane data scheduling transmission of the CoMP UE by using the CoMP resource, and specifically includes:
  • the CoMP resource used for the CoMP UE data transmission is determined according to the scheduling information, and the MAC PDU is transmitted by using the CoMP resource on the PDSCH.
  • the CCN schedules the CoMP UE to perform coordinated multi-point transmission, where the transmission point is a service base station of the CoMP UE, and the method further includes:
  • a retransmission unit configured to schedule CoMP UE data retransmission using the current non-CoMP resource when determining that data retransmission is required according to the negative acknowledgement NACK feedback information of the CoMP UE.
  • the retransmission unit uses the current non-CoMP resource to schedule CoMP UE data retransmission, and specifically includes: scheduling, by the CCN, the CoMP UE to perform CoMP UE data retransmission at a time other than the new data transmission by the serving base station to the CoMP UE.
  • the retransmission unit is further configured to:
  • the CCN schedules the serving base station of the CoMP UE to the CoMP UE. Perform new data transmission, and receive ACK/NACK feedback of new data and retransmitted data by two HARQs respectively.
  • the CCN schedules the CoMP UE to perform non-coordinated multipoint transmission, and the transmission point is a serving base station of the CoMP, and the scheduling transmission unit performs the user plane data scheduling transmission of the CoMP UE by using the CoMP resource, specifically:
  • the serving base station of the CoMP determines the scheduling information, determines the CoMP resource according to the scheduling information, and generates a MAC PDU, and uses the CoMP resource transmission on the PDSCH.
  • MAC PDU uses the CoMP resource transmission on the PDSCH.
  • the transmission point is a serving base station of the CoMP, and the method further includes:
  • An attaching receiving unit configured to receive an attach request message of the CoMP UE
  • an indication unit configured to determine, when the user equipment downlink data path of the SGW-CCN-CoMP UE serving base station-CoMP UE is established for the CoMP UE, instructing the core network to establish an S1-U connection of the serving base station of the SGW-CCN-CoMP UE.
  • the above-mentioned attaching and receiving unit is implemented by a communication module in the serving base station of the CoMP UE, and the functional unit for indicating that the unit is in communication with other nodes is implemented by the communication module, and the other functional portions are implemented by the central processing module.
  • the indication unit instructs the core network to establish an S1-U connection of the serving base station of the SGW-CCN-CoMP UE, which includes:
  • the related information of the attach request message and the CoMP UE is sent to the CCN according to the interface between the coordinated set of the serving base station that includes the CoMP UE and the CCN, and the CCN associates the attach request message with the CoMP UE.
  • the transmission point is a serving base station of the CoMP, and the method further includes:
  • the change indication unit is configured to notify the MME to perform the user plane downlink data path switching by using the path switching process, after the CoMP UE establishes the RRC connection, and determine that the CoMP UE is triggered to perform coordinated multi-point transmission, by changing the user plane downlink data path to the SGW-CCN - The serving base station of the CoMP UE.
  • the above indication change indication unit is implemented by a central processing module and a communication module in the serving base station of the CoMP UE, and the functional part related to communication with other nodes is implemented by the communication module, and other functional parts are implemented by the central processing module.
  • the transmission point is a serving base station of the CoMP, and the method further includes:
  • a CoMP indication unit configured to send a CoMP UE identifier and a coordinated multipoint transmission request to the CCN
  • the CoMP response receiving unit is configured to receive a coordinated multi-point transmission response of the CCN feedback.
  • the CoMP indication unit and the CoMP response receiving unit described above are implemented by a communication module of the serving base station of the CoMP.
  • the change indication unit determines to trigger the CoMP UE to perform coordinated multi-point transmission, and specifically includes: determining, according to the measurement of the CoMP UE, whether to trigger the CoMP UE to perform coordinated multi-point transmission; or determining whether to trigger according to the location information of the CoMP UE.
  • the CoMP UE performs coordinated multi-point transmission; or when the CMP UE that triggers the CCN activation is triggered to perform coordinated multi-point transmission notification, it is determined that the CoMP UE is triggered to perform coordinated multi-point transmission.
  • the method further includes:
  • an RRC switching unit configured to trigger an RRC connection between the serving base station of the CoMP UE and the COMP UE, and switch to an RRC connection between the COMP UE and the CCN.
  • the above RRC switching unit is implemented by a central processing module and a communication module in the serving base station of the CoMP UE, and the functional part related to communication with other nodes is implemented by the communication module, and other functional parts are implemented by the central processing module.
  • the central collaboration node CCN provided by the embodiment of the present invention, as shown in FIG. 13, includes:
  • a data receiving port 301 configured to acquire, from the serving gateway SGW, the user plane data of the CoMP UE to be transmitted; the processor 302, configured to acquire CSI of all UEs from a CCN scheduled transmission point, and according to the user plane data of the CoMP UE to be transmitted The CSI of all UEs communicates with the CCN scheduled transmission point, and performs scheduled transmission of the user plane data of the CoMP UE.
  • the processor 302 communicates with the CCN scheduled transmission point, and performs scheduling transmission of the user plane data of the CoMP UE, specifically:
  • the CCN determines, according to the size of the user plane data to be transmitted of the CoMP UE and the CSI of all UEs, when the CoMP UE performs coordinated multi-point transmission, selects a coordinated transmission point of the CoMP UE, and generates a MAC PDU of the CoMP UE;
  • the CC notifies the CoMP UE of the coordinated transmission point of the generated scheduling information and MAC PDU.
  • the processor 302 when the coordinated transmission point of the CoMP UE does not include the serving base station of the CoMP UE, the processor 302 also notifies the serving base station of the CoMP UE of the generated scheduling information and the MAC PDU.
  • the processor 302 does not schedule the serving base station of the CoMP UE to perform new data transmission to the CoMP UE at the time when the serving base station of the possible CoMP UE schedules the CoMP UE data retransmission; or
  • the processor 302 Before receiving the ACK feedback from the serving base station of the CoMP UE to the retransmitted data, the processor 302 does not schedule the serving base station of the CoMP UE to perform new data transmission to the CoMP UE.
  • the processor 302 communicates with the CCN scheduled transmission point, and performs scheduling transmission of the user plane data of the CoMP UE, specifically:
  • the user plane data to be transmitted and the non-cooperative transmission point identifier are sent to the serving base station of the CoMP UE.
  • the processor 302 generates the scheduling information of the CoMP UE, and sends the generated scheduling information of the CoMP UE and the user plane data to be transmitted to the serving base station of the CoMP UE, which specifically includes:
  • the CC generates scheduling information of the CoMP UE, and sends the generated scheduling information of the CoMP UE and part of the user plane data to be transmitted to the serving base station of the CoMP UE;
  • the CoMP UE's monthly service base station # CoMP UE scheduling information and part of the to-be-transmitted data generate a MAC PDU for single-point transmission of the CoMP UE;
  • the serving base station of the CoMP UE notifies the CCN of the identity of the transmitted data.
  • the data receiving port acquires the user plane data of the CoMP UE to be transmitted from the SGW based on the user plane downlink data path of the pre-established SGW-CCN-CoMP UE serving base station-CoMP UE.
  • the method further includes: an attach message receiving port, configured to receive an attach request message sent by the serving base station of the CoMP UE, and related information of the CoMP UE;
  • a message forwarding port configured to transmit the attach request message and the related information of the CoMP UE and the CCN related information to the mobility management entity MME, and establish an S1-MME connection of the serving base station of the MME-CCN-CoMP UE.
  • the above-mentioned attached message receiving port and message forwarding port are implemented by a communication module in the CCN.
  • the method further includes: a notification port, configured to send, when the CCN is activated, a notification that triggers the CoMP UE to perform coordinated multi-point transmission to the serving base station of the CoMP UE; or according to CSI and CoMP UE location information of >3 ⁇ 4 on each transmission point.
  • the CoMP UE is triggered to perform coordinated multipoint transmission, and when the CCN is activated, a notification is sent to the serving base station of the CoMP UE to trigger the CoMP UE to perform coordinated multipoint transmission.
  • the embodiment of the present invention further provides a transmission point, which is scheduled by the central cooperative node CCN, as shown in FIG. 14, and includes:
  • the reporting port 401 is configured to report, to the CCN, CSIs of all UEs that communicate with the transmission point;
  • the processor 402 is configured to: determine, by using the communication with the CCN, a CoMP resource used by the CoMP UE for data transmission, perform a user plane data scheduling transmission of the CoMP UE by using the CoMP resource, and perform non-CoMP UE user plane data scheduling transmission by using the non-CoMP resource.
  • the foregoing transmission point may include a base station and a relay node, where the base station includes a macro base station (Macro), a micro base station (Micro), a pico base station (Pico), a home base station or a femto base station (Femto), and the like.
  • the base station includes a macro base station (Macro), a micro base station (Micro), a pico base station (Pico), a home base station or a femto base station (Femto), and the like.
  • APs wireless access points
  • the processor 402 performs the user plane data scheduling transmission of the CoMP UE by using the CoMP resource, and specifically includes:
  • the CoMP resource used for the CoMP UE data transmission is determined according to the scheduling information, and the MAC PDU is transmitted by using the CoMP resource on the PDSCH.
  • the CCN schedules the CoMP UE to perform coordinated multi-point transmission, where the transmission point is a service base station of the CoMP UE, and the method further includes:
  • a retransmission port configured to use the current non-CoMP resource to schedule CoMP UE data retransmission when the data retransmission is determined according to the negative acknowledgement NACK feedback information of the CoMP UE.
  • the retransmission port uses the current non-CoMP resource to schedule CoMP UE data retransmission, and specifically includes: scheduling, by the CCN, the CoMP UE to perform CoMP UE data retransmission at a time other than the new data transmission by the serving base station to the CoMP UE.
  • the retransmission port is further configured to:
  • the CoMP UE retransmits the data, it is determined that the serving base station of the CCN scheduling CoMP UE performs new data transmission to the CoMP UE, and receives ACK/NACK feedback of the new data and the retransmitted data by the two HARQs respectively.
  • the CCN scheduling CoMP UE performs non-coordinated multipoint transmission, and the transmission point is a serving base station of the CoMP, and the processor 402 performs the user plane data scheduling transmission of the CoMP UE by using the CoMP resource, which specifically includes:
  • the serving base station of the CoMP determines the scheduling information, determines the CoMP resource according to the scheduling information, and generates a MAC PDU, and uses the CoMP resource transmission on the PDSCH.
  • MAC PDU uses the CoMP resource transmission on the PDSCH.
  • the transmission point is a serving base station of the CoMP, and the method further includes:
  • An attaching receiving port configured to receive an attach request message of the CoMP UE
  • the indication port is configured to determine, when the user equipment downlink data path of the SGW-CCN-CoMP UE serving base station-CoMP UE is established for the CoMP UE, to instruct the core network to establish an S1-U connection of the serving base station of the SGW-CCN-CoMP UE.
  • the indication port instructs the core network to establish an S1-U connection of the serving base station of the SGW-CCN-CoMP UE, which includes:
  • the inter-interface sends the attach request message and the related information of the CoMP UE to the CCN, and the CCN transmits the attach request message and the related information of the CoMP UE and the CCN related information to the mobility management entity MME to establish the MME-CCN-CoMP.
  • the transmission point is a serving base station of the CoMP, and the method further includes:
  • the change indication port is configured to notify the MME to perform the user plane downlink data path switching by using the path switching process when the CoMP UE is configured to trigger the coordinated multipoint transmission after the RRC connection is established by the CoMP UE, and the downlink data path of the user plane is changed to SGW-CCN.
  • the serving base station of the CoMP UE The serving base station of the CoMP UE.
  • the transmission point is a serving base station of the CoMP, and the method further includes:
  • a CoMP indication port configured to send a CoMP UE identifier and a coordinated multipoint transmission request to the CCN
  • the CoMP response receiving port is used to receive the coordinated multi-point transmission response of the CCN feedback.
  • the above CoMP indication port and the CoMP response receiving port are implemented by a communication module of the CoMP serving base station.
  • the change indication port determines to trigger the CoMP UE to perform coordinated multi-point transmission, and the method includes: determining, according to the measurement of the CoMP UE, whether the CoMP UE is triggered to perform coordinated multi-point transmission; or determining whether to trigger according to the location information of the CoMP UE.
  • the CoMP UE performs coordinated multi-point transmission; or when the CMP UE that triggers the CCN activation is triggered to perform coordinated multi-point transmission notification, it is determined that the CoMP UE is triggered to perform coordinated multi-point transmission.
  • the method further includes:
  • an RRC handover port configured to trigger an RRC connection between the serving base station of the CoMP UE and the COMP UE, and switch to an RRC connection between the COMP UE and the CCN.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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

Abstract

La présente invention concerne un procédé, un dispositif et un système de transmission de données planifiées par un système de transmission multipoint coordonnée (CoMP). Des données de plan d'utilisateur à transmettre d'un UE CoMP sont acquises à partir d'une SGW. Des CSI de l'ensemble des UE et le volume des données de plan d'utilisateur à transmettre d'un UE non-CoMP sont acquises à partir de l'ensemble des points de transmission coordonnée. La communication est effectuée au moyen d'un point de transmission coordonnée planifié par CCN. La planification et la transmission des données de plan d'utilisateur de l'UE CoMP sont exécutées. Un point de transmission coordonnée qui se trouve dans une même collecte coordonnée qu'un CCN rapporte au CCN les CSI de l'ensemble des UE dans le point de transmission coordonnée et le volume des données de plan d'utilisateur à transmettre de l'UE non-CoMP. Au moyen de la communication avec le CCN, une ressource CoMP est utilisée en vue d'exécuter la planification et la transmission des données de plan d'utilisateur de l'UE CoMP, tandis qu'une ressource non-CoMP est utilisée en vue d'exécuter la planification et la transmission des données de plan d'utilisateur de l'UE non-CoMP. Cela permet de résoudre le problème lié au traitement de la transmission de données d'utilisateur lorsque le CCN réalise une desserte en tant que nœud de commande de planification dans un scénario de liaison terrestre non idéal.
PCT/CN2014/081823 2013-07-09 2014-07-08 Procédé, dispositif et système de transmission de données planifiées par un centre de transmission multipoint coordonnée WO2015003614A1 (fr)

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CN106162931B (zh) * 2015-04-08 2020-01-03 华为技术有限公司 数据传输方法和装置
WO2017008285A1 (fr) * 2015-07-15 2017-01-19 华为技术有限公司 Procédé et dispositif de communication par liaison terrestre sans fil
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