WO2012146123A1 - 一种实现半持续调度传输的方法及装置 - Google Patents

一种实现半持续调度传输的方法及装置 Download PDF

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Publication number
WO2012146123A1
WO2012146123A1 PCT/CN2012/073544 CN2012073544W WO2012146123A1 WO 2012146123 A1 WO2012146123 A1 WO 2012146123A1 CN 2012073544 W CN2012073544 W CN 2012073544W WO 2012146123 A1 WO2012146123 A1 WO 2012146123A1
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Prior art keywords
data packet
resource
sps
enb
mbsfn subframe
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English (en)
French (fr)
Inventor
谌丽
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China Academy of Telecommunications Technology CATT
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China Academy of Telecommunications Technology CATT
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Priority to US14/114,633 priority Critical patent/US9160512B2/en
Priority to KR1020137031802A priority patent/KR101538996B1/ko
Priority to EP12776677.2A priority patent/EP2704458B1/en
Publication of WO2012146123A1 publication Critical patent/WO2012146123A1/zh
Anticipated expiration legal-status Critical
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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/24Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2612Arrangements for wireless medium access control, e.g. by allocating physical layer transmission capacity
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signalling, i.e. of overhead other than pilot signals
    • H04L5/0055Physical resource allocation for ACK/NACK
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/12Wireless traffic scheduling
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/02Details
    • H04L12/16Arrangements for providing special services to substations
    • H04L12/18Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signalling, i.e. of overhead other than pilot signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/40Connection management for selective distribution or broadcast

Definitions

  • MBMS can be provided on both the MBMS-dedicated frequency layer and the frequency layer shared with non-MBMS services.
  • the LTE cell supporting MBMS may be an MBMS dedicated cell, or may be an MBMS or a unicast hybrid cell.
  • the MBMS service can perform single cell transmission or multi-cell transmission.
  • the multi-cell transmission of MBMS needs to support the Multimedia Broadcast multicast service Single Frequency Network (MBSFN) transmission mode.
  • MBSFN Multimedia Broadcast multicast service Single Frequency Network
  • the MBSFN transmission method refers to synchronous transmission in multiple cells at the same frequency at the same time. Using this transmission method can save frequency resources and improve spectrum utilization. It requires multiple cells to send identical content at the same time. In this way, the User Equipment (UE) can treat multiple MBSFN cells as one large cell. Therefore, the UE will not only be plagued by neighboring cell signals, but will also benefit from the superposition of signals from multiple MBSFN cells. Both the MBMS dedicated cell and the MBMS or unicast hybrid cell can use the MBSFN transmission mode. In addition, if advanced UE receiver technology is used, the time difference of multipath propagation can be solved, thereby eliminating interference in the small area. The diversity effect brought by such multi-cell co-frequency transmission can also solve problems such as blind zone coverage, enhance the reliability of reception, and improve coverage.
  • MBMS multi-cell transmission The technical features of MBMS multi-cell transmission are as follows:
  • MTCH Logical channel - Multicast Traffic Channel
  • MCCH Multicast Control Channel
  • PMCH Physical Multicast Channel
  • the MBSFN synchronization area can be semi-statically configured, for example, semi-statically configured through Operations & Maintenance (0&O).
  • the first 1 ⁇ 2 symbols in the MBSFN sub-frame are control symbols, which carry the PDCCH for unicast transmission scheduling, and the latter part is the data field, which carries the PMCH when there is MBMS service transmission.
  • the logical channels related to MBMS transmission mainly include: Broadcast Control Channel (BCCH), MCCH and MTCH.
  • BCCH Broadcast Control Channel
  • MCCH MCCH
  • MTCH MTCH
  • BCCH Broadcast Control Channel
  • SIB System Information Block
  • the SIB 13 schedules a notification (a notification mechanism for the MCCH change notification) and an MCCH, and the scheduling command includes an MBSFN subframe indication of the transmission notification and the MCCH.
  • the Multicast Control Channel is a point-to-multipoint downlink channel used by the network to transmit MBMS-related control information in the MBSFN area to the UE.
  • One MCCH may correspond to one or more MTCHs (ie: Can carry multiple MTCH control information).
  • the information that the MCCH can include is: a subframe allocation of the MBSFN area, configuration information of the PMCH (or MCH), and the like.
  • the configuration information of the PMCH (or MCH) for example: MBMS session information, Modulation and Coding Scheme (MCS) configuration, PMCH subframe position, and scheduling period.
  • MCS Modulation and Coding Scheme
  • the Multicast Traffic Channel is a point-to-multipoint downlink channel used by the network to send specific MBMS service data to the UE.
  • the network uses the BCCH (including the SIB2 and the SIB13) to indicate the MCCH configuration information to the UE, and then uses the MCCH to provide the PMCH or MCH information to the UE, and the UE reads the MCH scheduling information (MSI, MCH Scheduling Information) of the specific service on the PMCH or the MCH. Thereby, the MBMS service can be received on the MTCH.
  • MCH scheduling information MSI, MCH Scheduling Information
  • the MBSFN subframe used for MBMS service transmission is the MCH Scheduling Information MAC Control Element (MSI MAC CE).
  • Fig. 1 shows the relationship between the MBMS service area and the MBSFN synchronization area and the like.
  • the physical layer protocol has specified that the UE of the LTE Release 10 (R10) system can receive data transmitted by the Physical Downlink Shared Channel (PDSCH) on the MBSFN subframe. Specifically, only the UE configured by the base station to transmit mode 9 (tm9) can receive the data transmitted by the PDSCH on the MBSFN subframe. Includes downlink transmission data for semi-persistent scheduling (SPS).
  • SPS semi-persistent scheduling
  • the semi-persistent scheduling transmission is characterized in that: the evolved base station (eNB, Evolved Node B) notifies the UE of the semi-persistent scheduling resource information allocated to the UE by using a scheduling command transmitted by the physical downlink control channel (PDCCH), including the time frequency.
  • the information such as the resource and the transmission format (for example, the modulation and coding format) is started from the semi-persistent scheduling resource allocation subframe, and the corresponding time-frequency resource locations of the subframes of the subsequent interval fixed period are reserved for the UE to perform data according to the specified transmission format.
  • Transmission, and no more PDCCH command indication these semi-persistent scheduling transmissions that do not require scheduling commands, also known as configured DL assignment.
  • the semi-persistent scheduling transmission is terminated until the eNB sends a PDCCH command to release the SPS resource. Referring to FIG. 2, the following line semi-persistent scheduling transmission is taken as an example for description.
  • the eNB sends a PDCCH command for allocating the SPS resource at time T1, and simultaneously transmits the first downlink SPS transmission data, where the PDCCH carries information of the SPS time-frequency resource and the transmission format;
  • T2 T4 time On every fixed period (T) subframe, the UE receives SPS transmission data according to a specified transmission format on a specified time-frequency resource, and PDCCH command scheduling is no longer needed in these subframes, that is, T2-T4
  • the SPS resource is a pre-configured downlink resource, and the downlink transmission is a so-called configured downlink transmission;
  • the eNB sends PDCCH information indicating that the UE releases the SPS resource, and instructs the UE to release the originally allocated SPS resource to complete the SPS transmission.
  • Embodiments of the present invention provide a method and apparatus for implementing semi-persistent scheduling transmission, which are used to implement semi-persistent scheduling transmission through MBSFN subframes.
  • the user equipment UE determines a MBSFN subframe of the multimedia broadcast multicast service single frequency network
  • the UE receives the SPS transmission packet in the MBSFN subframe.
  • the evolved base station eNB determines a MBSFN subframe of the multimedia broadcast multicast service single frequency network
  • the eNB transmits an SPS transmission packet in the MBSFN subframe.
  • An MBSFN subframe determining unit configured to determine a MBSFN subframe of a multimedia broadcast multicast service single frequency network
  • the SPS data packet receiving unit is configured to receive the SPS transmission data packet in the MBSFN subframe.
  • An MBSFN subframe determining unit configured to determine a MBSFN subframe of a multimedia broadcast multicast service single frequency network;
  • the SPS data packet sending unit is configured to send the SPS transmission data packet in the MBSFN subframe.
  • the MBSFN subframe of the multimedia broadcast multicast service single frequency network is determined by the user equipment UE; the UE receives the SPS transmission data packet in the MBSFN subframe, thereby implementing semi-persistent scheduling transmission through the MBSFN subframe.
  • FIG. 1 is a schematic diagram of an MBMS related area
  • FIG. 2 is a schematic diagram of downlink downlink persistent scheduling transmission in the prior art
  • FIG. 3 is a schematic flowchart of a method for implementing semi-persistent scheduling transmission according to an embodiment of the present invention
  • FIG. 4 is a schematic flowchart of a method for implementing semi-persistent scheduling transmission according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of a semi-persistent scheduling transmission in mode 2 according to an embodiment of the present invention.
  • FIG. 7 is a schematic flowchart of a method for implementing semi-persistent scheduling transmission according to Embodiment 1 of the present invention
  • FIG. 8 is a schematic flowchart of a method for implementing semi-persistent scheduling transmission according to Embodiment 2 of the present invention
  • FIG. 10 is a schematic flowchart of a method for implementing semi-persistent scheduling transmission according to Embodiment 4 of the present invention
  • FIG. 10 is a schematic flowchart of a method for implementing semi-persistent scheduling transmission according to Embodiment 4 of the present invention
  • Embodiments of the present invention provide a method and apparatus for implementing semi-persistent scheduling transmission, which are used to implement semi-persistent scheduling transmission on an MBSFN subframe.
  • the semi-persistent scheduling resource may be in the same subframe as the MBMS transmission resource, so the MBMS service transmission may collide with the configured downlink transmission.
  • the UE if the MBMS service is not received, it cannot be determined in advance that the configured downlink transmission conflicts with the MBMS transmission.
  • the UE attempts to receive the semi-persistent scheduling transmission data in the MBSFN subframe, and if the decoding error occurs (that is, the semi-persistent scheduling transmission data cannot be obtained), the UE triggers the information to trigger the base station to perform the semi-persistent scheduling transmission again. Or, the method for the UE to indicate that the UE does not perform the configured downlink transmission in the current MBSFN subframe, and avoids the resource required for the semi-persistent scheduling transmission and the resource required for the MBMS transmission to be the same MBSFN subframe, thereby avoiding the collision between the semi-persistent scheduling transmission and the MBMS transmission.
  • the correct transmission of semi-persistent scheduling is implemented on the MBSFN subframe.
  • the UE in the embodiment of the present invention refers to a UE configured to receive PDSCH transmission data in an MBSFN subframe, and specifically refers to a UE configured to transmit mode 9.
  • a UE configured to receive PDSCH transmission data in an MBSFN subframe and specifically refers to a UE configured to transmit mode 9.
  • a method for implementing semi-persistent scheduling SPS transmission includes the following steps:
  • the user equipment UE determines a MBSFN subframe of a multimedia broadcast multicast service single frequency network
  • the UE receives the SPS transmission data packet in the MBSFN subframe.
  • the receiving, by the UE, the SPS transmission data packet in the MBSFN subframe includes:
  • the UE receives, in the MBSFN subframe, the data packet carried by the evolved base station eNB on the configured downlink resource (configured DL assignment) and carries the data on the physical downlink shared channel PDSCH, and performs decoding, and sends a non-acknowledgment to the eNB when the decoding error occurs.
  • NACK information ;
  • the UE receives the retransmission data packet of the data packet sent by the eNB, and combines and decodes the data packet with the decoding error to obtain the unicast service data transmitted by the PDSCH.
  • the receiving, by the UE, the SPS transmission data packet in the MBSFN subframe includes:
  • the UE receives, in the MBSFN subframe, the data packet carried by the evolved base station eNB on the configured downlink resource of the physical downlink shared channel PDSCH, and performs decoding, and sends a non-acknowledged NACK information to the evolved base station eNB when the decoding error occurs. ;
  • the UE discards the data packet; or, the UE determines whether the data packet needs to be discarded, and if so, discards the data packet, otherwise the data packet is retained;
  • the UE receives the retransmission data packet of the data packet sent by the eNB, and combines and decodes the data packet with the decoding error to obtain the unicast service data transmitted by the PDSCH.
  • the UE discarding the data packet includes:
  • the UE determines that the MBMS service data is currently being received, and determines that the subframe in which the configured downlink resource is located needs to transmit the MBMS service data, and discards the data packet received by the configured downlink resource;
  • the UE determines whether the data packet needs to be discarded, and if yes, discards the data packet, otherwise retaining the data packet, including:
  • the UE detects the signal strength of the UE-specific reference signal DM-RS or the cell-specific reference signal CRS or the channel state information reference signal CSI-RS. If the signal strength is higher than the preset threshold, the data packet is reserved, otherwise, the data packet is discarded.
  • the receiving, by the UE, the SPS transmission data packet in the MBSFN subframe includes:
  • the UE Receiving, by the UE, the physical downlink control channel PDCCH scheduling command for releasing the SPS resource sent by the evolved base station eNB; the UE releasing the SPS resource according to the scheduling command, and not receiving the downlink unicast service data in the current MBSFN subframe;
  • the UE receives the data packet originally transmitted on the configured downlink resource according to the scheduling of the eNB;
  • the UE receives the SPS resource allocation command sent by the eNB, and determines, according to the command, the downlink half-continuous adjustment of the subsequent configuration. Degree resources, and receive downlink unicast service data.
  • the receiving, by the UE, the SPS transmission data packet in the MBSFN subframe includes:
  • the UE receives the physical downlink control channel PDCCH scheduling command that is invalid for the downlink resource configured by the current MBSFN subframe, and does not receive the downlink unicast service data in the current MBSFN subframe according to the scheduling command.
  • the UE receives the data packet originally transmitted on the configured downlink resource according to the scheduling of the eNB;
  • the UE receives the downlink unicast service data according to the configured time-frequency resource at the time of the downlink half-continuous scheduling resource configured.
  • the PDCCH scheduling command carries a downlink control message DCI
  • the hybrid automatic retransmission HARQ process number in the DCI is set to a specific code point other than all 0s; or, the high MSB indicated by the MCS in the DCI is set to 1 and the MCS is not all 1; or
  • the redundancy version number RV in the DCI is set to a specific code point other than all 0;
  • the resource indication in the DCI is set to all 0s.
  • a method for implementing semi-persistent scheduling SPS transmission includes the following steps:
  • the evolved base station eNB determines a MBSFN subframe of a multimedia broadcast multicast service single frequency network
  • the eNB sends an SPS transmission data packet in the MBSFN subframe.
  • the eNB sends the SPS transmission data packet in the MBSFN subframe, including:
  • the eNB sends the SPS transmission data packet to the user equipment UE in the MBSFN subframe, where the SPS transmission data packet includes the unicast service data packet sent on the configured downlink resource;
  • the eNB receives the non-acknowledged NACK information sent by the UE, and sends a retransmission data packet of the data packet to the UE according to the NACK information.
  • the eNB sends the SPS transmission data packet in the MBSFN subframe, including:
  • the eNB detects whether the configured downlink resource occurs in the MBMS transmission subframe, and when it is determined that the configured downlink resource occurs in the MBMS transmission subframe, sends a PDCCH scheduling command for instructing the UE to release the SPS resource;
  • the eNB dynamically schedules a data packet originally scheduled to be transmitted on the configured downlink resource
  • the eNB re-sends the SPS resource allocation in the MBSFN subframe that does not collide with the MBMS transmission, and transmits the data in the allocated SPS resource.
  • the eNB sends the SPS transmission data packet in the MBSFN subframe, including:
  • the eNB detects whether the configured downlink resource occurs in the MBMS transmission subframe, and when it is determined that the configured downlink resource occurs in the MBMS transmission subframe, sends a PDCCH scheduling command indicating that the downlink resource configured in the current MBSFN subframe configuration is invalid; The eNB dynamically schedules a data packet originally scheduled to be transmitted on the configured downlink resource;
  • the eNB sends unicast service data on the downlink semi-persistent scheduling resource configured subsequently.
  • the PDCCH scheduling command carries a downlink control message DCI
  • the hybrid automatic retransmission HARQ process number in the DCI is set to a specific code point other than all 0s; or, the high MSB indicated by the MCS in the DCI is set to 1 and the MCS is not all 1; or
  • the redundancy version number RV in the DCI is set to a specific code point other than all 0;
  • the resource indication in the DCI is set to all 0s.
  • the specific implementation manners of implementing the correct transmission of the semi-persistent scheduling on the MBSFN subframe are as follows:
  • Manner 1 The UE feedback information is used to trigger the base station to perform semi-persistent scheduling transmission again.
  • the method can be further divided into the following two implementation modes:
  • Mode A The UE decodes the data packet transmitted by the PDSCH (hereinafter referred to as the first received data packet) in the MBSFN subframe, and attempts to acquire the downlink transmission data of the SPS. If the decoding is incorrect, the feedback is non-acknowledgement (NACK).
  • NACK non-acknowledgement
  • the information is sent to the eNB; after receiving the NACK information, the eNB transmits or retransmits the data packet originally scheduled to be sent on the configured downlink resource, where the subsequent dynamic transmission mode is used when transmitting or retransmitting the data packet. Any resource scheduled by the base station is used; after receiving the subsequent data packet, the UE performs combined decoding with the first received data packet to solve the downlink unicast service data transmitted by the PDSCH. If the UE fails to decode correctly when the preset maximum number of retransmissions (for example, 4 times) is reached, the first received packet is discarded.
  • the preset maximum number of retransmissions for example, 4
  • the first type The eNB transmits a unicast service data packet.
  • the UE can perform merge and decoding successfully by the subsequently retransmitted data packet.
  • the second type Since the current MBSFN subframe needs to transmit the MBMS service, the eNB transmits the MBMS service in the MBSFN subframe, and there is no unicast service data packet transmission.
  • the UE uses the first received data packet to combine and decode the unicast service data packet transmitted by the subsequent base station, it is equivalent to introducing a strong interference, and the unicast service data packet may not be correctly decoded.
  • Mode B The UE decodes the data packet transmitted by the PDSCH (hereinafter referred to as the first received data packet) in the MBSFN subframe, and attempts to acquire the downlink transmission data of the SPS. If the decoding is incorrect, the NACK information is fed back to the eNB. And directly discarding the data packet, or determining whether the data packet needs to be discarded, and if so, discarding the data packet, otherwise the data packet is retained.
  • the PDSCH hereinafter referred to as the first received data packet
  • the activation detection may determine whether the data packet needs to be discarded, including:
  • DM-RS UE-specific demodulation reference signal
  • CRS cell-specific reference signal
  • Channel 4 state information a reference symbol
  • CSI-RS The signal strength of the reference signal (CSI-RS) (which may be the strength of the signal power or amplitude, etc., depending on the actual algorithm used), and determines whether the data packet sent by the current MBSFN subframe is a unicast service data packet or an MBMS data packet. When the symbol strength is greater than the preset threshold, it is determined that the data packet sent by the current MBSFN subframe is a unicast service data packet, otherwise, the data packet sent by the current MBSFN subframe is determined to be an MBMS data packet.
  • the threshold value may be set according to actual needs, and is a value that the eNB can determine that the eNB actually sends the reference symbol. If it is determined that the data packet transmitted by the current MBSFN subframe is an MBMS data packet, the data packet is discarded. If it is determined that the data packet sent by the current MBSFN subframe is a unicast service data packet, the data packet is retained.
  • the UE If the UE is receiving the MBMS data packet sent by the MBSFN subframe, it is determined that the MBSFN subframe cannot send the unicast service data packet, and it is not necessary to determine whether the data packet needs to be discarded by the activation detection, and the data packet is directly discarded.
  • the eNB After receiving the NACK feedback, the eNB transmits or retransmits the transport block that should be sent on the configured downlink resource. After receiving the subsequent transport block, the UE combines and decodes the first received data packet to solve the PDSCH transmission. Downstream unicast service packets. If the UE fails to decode correctly when the preset maximum number of retransmissions is reached, the first received packet is discarded.
  • Mode B differs from mode A in that: the UE may discard the undecoded data packets received in the MBSFN subframe, and may not perform hybrid automatic retransmission (HARQ) combining with the subsequently retransmitted data packets, thereby avoiding the MBMS transmission.
  • HARQ hybrid automatic retransmission
  • the UE treats the MBMS transmission data packet as a unicast service data packet to introduce a strong interference of retransmission combining.
  • the retransmission combining gain is reduced.
  • the eNB may determine that an MBSFN subframe actually transmits an MBMS data packet or a unicast service data packet. In the case that the unicast service data packet is not actually sent in the MBSFN subframe, the subsequent first retransmission may be performed. Re-flying the service data packet with the self-decoding redundancy version as the transmission version of the data packet. Further, if the configured semi-persistent scheduling transmission resource occurs in the MBSFN subframe, and the eNB subsequently re-broadcasts the service data packet for the first time, the self-decoded redundancy version is always used.
  • Manner 2 The eNB indicates, by using the PDCCH, a downlink transmission that is not configured on the current MBSFN subframe, that is, the eNB indicates that the UE does not have the SPS downlink transmission data in the current MBSFN subframe.
  • the method can also be specifically divided into the following two implementation modes:
  • Mode C The eNB sends the resource release indication PDCCH command to enable the UE to release the SPS resource when the downlink transmission of the current MBSFN subframe configuration conflicts with the MBMS transmission, and the command also instructs the UE to release the subsequently configured downlink resource (ie, the UE All semi-persistent scheduling allocation resources are released); the eNB subsequently re-sends SPS resource allocation.
  • the unicast service data transmission block 1 that cannot be transmitted due to collision with the MBMS transmission is transmitted by the eNB in a dynamic scheduling manner after the current MB SFN subframe.
  • the mode D: e B uses a specific PDCCH command to indicate that the current MBSFN subframe cannot be used for the configured downlink transmission, but the downlink resources configured subsequently are still valid.
  • the unicast service data transmission block 1 that fails to be transmitted due to the MBMS transmission conflict is transmitted by the eNB in a dynamic scheduling manner after the current MBSFN subframe.
  • the PDCCH for indicating that the configured downlink resource is invalid has the following features:
  • the PDCCH is scrambled by a Semi-Persistent Scheduling Cell Radio Network Temporary Identifier (C-RNTI);
  • C-RNTI Semi-Persistent Scheduling Cell Radio Network Temporary Identifier
  • the format of the downlink control message (DCI) carried by the PDCCH is determined by using a specific code point to identify that the downlink resource of the configuration corresponding to the current MBSFN subframe is invalid.
  • the specific code point is one of the following design modes or a combination of multiple design modes. :
  • the HARQ process number is set to a preset specific code point other than all 0s. For example, for a frequency division duplex (FDD) system, set to "111”, for a time division duplex (TDD) system, set to "1111". Or,
  • the Most Significant Bit (MSB) indicated by the MCS is set to " ⁇ , and the MCS is not all 1s, for example, it can be "10000"; or,
  • the redundancy version (RV) number is set to a preset specific code point other than all 0s, for example, it can be set to "11"; or,
  • the resource indication is set to all 0s.
  • Embodiment 1 The UE receives the configured downlink transmission data packet in the MBSFN subframe, and if the data packet is decoded incorrectly, performs HARQ merge decoding with the subsequent retransmission data packet.
  • a method for implementing semi-persistent scheduling transmission by using an MBSFN subframe includes:
  • Step 1 The UE receives the configured downlink transmission data packet in the MBSFN subframe and decodes the downlink transmission data packet, and the downlink transmission data packet does not have a corresponding PDCCH scheduling indication in the current subframe.
  • Step 2 If the decoding is wrong, the UE feeds back the NACK information to e B.
  • Step 3 The eNB receives the fed back NACK information, and organizes the retransmission scheduling of the data packet. If the downlink transmission subframe configured in step 1 actually transmits the MBMS data packet, the eNB must use the retransmission data packet when the eNB organizes the retransmission data packet. A redundant version that can be self-decoded, such as RV0.
  • Step 4 The UE receives the retransmission data packet, which is scheduled by the PDCCH scheduling command, and may occur in an MBSFN subframe or a non-MBSFN subframe.
  • Step 5 The UE retransmits and retransmits the data packet received in the retransmission data packet and the first step.
  • Embodiment 2 The UE receives the configured downlink transmission data packet in the MBSFN subframe, and detects whether the data needs to be discarded. Packet, HARQ merge decoding with subsequent retransmission data packets as needed.
  • a method for implementing semi-persistent scheduling transmission by using an MBSFN subframe includes:
  • Step 1 The UE receives the configured downlink transmission data packet in the MBSFN subframe and decodes the downlink transmission data packet, and the downlink transmission data packet does not have a corresponding PDCCH scheduling indication in the current subframe.
  • Step 2 If the decoding is incorrect, the UE feeds back the NACK information to the e B, and performs the activation detection.
  • the activation detection method is: measuring the UE-specific reference symbol DM-RS (demodulation reference signal) or the cell reference symbol CRS (Cell) If the strength of the reference signal is higher than the preset threshold, the current MBSFN subframe is considered to have unicast service data, otherwise the current MBSFN is considered. There is no unicast service data for the subframe. If the current MBSFN subframe is considered to have no unicast service data by the activation check, the data packet is discarded.
  • DM-RS demodulation reference signal
  • Cell cell reference symbol
  • Step 3 The eNB receives the fed back NACK information, and organizes the retransmission scheduling of the data packet. If the downlink transmission subframe configured in step 1 actually transmits the MBMS data packet, the eNB must use the retransmission data packet when the eNB organizes the retransmission data packet. A redundant version that can be self-decoded, such as RV0.
  • Step 4 The UE receives the retransmission data packet, which is scheduled by the PDCCH scheduling command, and may occur in an MBSFN subframe or a non-MBSFN subframe.
  • Step 5 If the data packet received in step one is not discarded by the activation detection, the UE retransmits and retransmits the received retransmission data packet and the data packet received in step one, otherwise only the received retransmission is received. The packet is decoded.
  • Embodiment 3 The eNB releases the SPS resource when the MBMS transmission conflicts with the configured downlink resource.
  • a method for implementing semi-persistent scheduling transmission by using an MBSFN subframe includes:
  • Step 1 The eNB detects whether the configured downlink resource occurs in the MBMS transmission subframe. When it is determined that the configured downlink resource occurs in the MBMS transmission subframe, the eNB sends a PDCCH scheduling command for instructing the UE to release the SPS resource.
  • Step 2 The UE receives a PDCCH scheduling command for instructing the UE to release the SPS resource, and then releases the SPS resource, and does not receive the configured downlink transmission data packet in the current subframe.
  • Step 3 The eNB dynamically schedules data packets originally scheduled to be transmitted on the configured downlink resources in subsequent subframes.
  • the dynamic scheduling that is, the eNB uses a PDCCH command in the selected subframe to instruct the UE to receive downlink transmission data in a specified transmission format on the designated resource of the subframe.
  • Step 4 The UE receives the downlink data according to the dynamic scheduling of the eNB, and completes receiving the data packet that is originally scheduled to be transmitted on the configured downlink resource.
  • the base station can continue dynamic scheduling on any resource of any subframe.
  • Dynamic scheduling differs from semi-persistent scheduling in that dynamic scheduling uses a PDCCH scheduling command to schedule a transmission.
  • Step 5 e B re-sends the SPS resource allocation in the MBSFN subframe that does not conflict with the MBMS transmission.
  • Step 6 The UE receives the SPS resource allocation command, and performs subsequent SPS data reception according to the instruction of the SPS resource allocation command.
  • Embodiment 4 The eNB notifies that the downlink resource configured by the current MBSFN subframe is invalid by using a specific PDCCH command.
  • a method for implementing semi-persistent scheduling transmission by using an MBSFN subframe according to an embodiment of the present invention includes:
  • Step 1 The eNB detects whether the configured downlink resource occurs in the MBMS transmission subframe. When it is determined that the configured downlink resource occurs in the MBMS transmission subframe, the specific PDCCH scheduling command for indicating that the downlink resource configured in the current MBSFN subframe configuration is invalid is sent.
  • the particular PDCCH follows the design principles described in Mode D.
  • Step 2 The UE receives a specific PDCCH scheduling command, and does not receive the configured downlink transmission in the current MBSFN subframe.
  • Step 3 The eNB dynamically schedules the data packet originally scheduled to be transmitted on the configured downlink resource in the subsequent MBSFN subframe.
  • Step 4 The UE receives the downlink data according to the eNB scheduling, and completes receiving the data packet that is originally scheduled to be transmitted on the configured downlink resource.
  • Step 5 The UE continues to receive the configured downlink transmission data packet according to the SPS configured time-frequency resource in the subsequent subframe.
  • a system for implementing semi-persistent scheduling SPS transmission according to an embodiment of the present invention includes an eNB and at least one UE. On the UE side, referring to FIG. 11, an apparatus for implementing semi-persistent scheduling SPS transmission according to an embodiment of the present invention includes:
  • the MBSFN subframe determining unit 101 is configured to determine a multimedia broadcast multicast service single frequency network MBSFN subframe
  • the SPS data packet receiving unit 102 is configured to receive the SPS transmission data packet in the MBSFN subframe.
  • the SPS data packet receiving unit 102 includes:
  • a NACK feedback unit configured to receive, in an MBSFN subframe, a data packet that is transmitted by the evolved base station eNB on the configured downlink resource and that is carried on the physical downlink shared channel (PDSCH), and perform decoding, and send a non-acknowledgment to the eNB when the decoding error occurs.
  • NACK information ;
  • the merging decoding unit is configured to receive a retransmission data packet of the data packet sent by the eNB, and perform combined decoding with the data packet with the decoding error to obtain unicast service data transmitted by the PDSCH.
  • the SPS data packet receiving unit 102 includes:
  • a NACK feedback unit configured to receive, in an MBSFN subframe, a data packet that is transmitted by the evolved base station eNB on the configured downlink resource and that is carried on the physical downlink shared channel (PDSCH), and performs decoding, and when the decoding error occurs, the packet is evolved.
  • the base station eNB transmits non-acknowledgment NACK information;
  • a packet discarding processing unit configured to discard the data packet; or, determining whether the data packet needs to be discarded, and if yes, discarding the data packet; otherwise, retaining the data packet;
  • the merging decoding unit is configured to receive a retransmission data packet of the data packet sent by the eNB, and perform combined decoding with the data packet with the decoding error to obtain unicast service data transmitted by the PDSCH.
  • the data packet discarding processing unit determines that the MBMS service data is currently being received, and determines that the subframe in which the configured downlink resource is located needs to transmit the MBMS service data, and discards the data packet received by the configured downlink resource. ;
  • the data packet discarding processing unit detects a signal strength of the UE-specific reference signal DM-RS or the cell-specific reference signal CRS or the channel state information reference signal CSI-RS, and if the signal strength is higher than a preset threshold, the data packet is retained. Otherwise, discard the packet.
  • the SPS data packet receiving unit 102 includes:
  • a SPS resource command receiving unit configured to receive a physical downlink control channel PDCCH scheduling command for releasing the SPS resource sent by the evolved base station eNB;
  • the SPS resource unit configured to release the SPS resource according to the scheduling command, and not receive the downlink unicast service data in the current MBSFN subframe;
  • a data packet receiving unit configured to receive, according to scheduling of the eNB, a data packet that is originally scheduled to be transmitted on the configured downlink resource
  • the SPS receiving unit is configured to receive an SPS resource allocation command sent by the eNB, and determine a downlink semi-persistent scheduling resource that is subsequently configured according to the command, and receive downlink unicast service data.
  • the SPS data packet receiving unit 102 includes:
  • the resource invalidation command receiving processing unit is configured to receive a physical downlink control channel PDCCH scheduling command that is invalid for a downlink resource configured by the current MBSFN subframe, and does not receive a downlink singleton in the current MBSFN subframe according to the scheduling command. Broadcast business data;
  • a data packet receiving unit configured to receive, according to a scheduling of the eNB, a data packet that is originally scheduled to be transmitted on the configured downlink resource, where the SPS receiving unit is configured to perform, according to the configured time-frequency resource, Receive downlink unicast service data.
  • the PDCCH scheduling command has the following features:
  • the PDCCH scheduling command carries a downlink control message DCI
  • the hybrid automatic retransmission HARQ process number in the DCI is set to a specific code point other than all 0s; or, the high MSB indicated by the MCS in the DCI is set to 1 and the MCS is not all 1; or
  • the redundancy version number RV in the DCI is set to a specific code point other than all 0s; or The resource indication in the DCI is set to all zeros.
  • the resource invalidation command receiving processing unit determines, by using the above feature, that the PDCCH scheduling command with the downlink resource configured in the current MBSFN subframe configured by the eNB is invalid.
  • an apparatus for implementing semi-persistent scheduling SPS transmission includes:
  • the MBSFN subframe determining unit 201 is configured to determine a multimedia broadcast multicast service single frequency network MBSFN subframe
  • the SPS data packet sending unit 202 is configured to send the SPS transport data packet in the MBSFN subframe.
  • the SPS data packet sending unit 202 includes:
  • a first sending unit configured to send an SPS transmission data packet to the user equipment UE in the MBSFN subframe, where the SPS transmission data packet includes a unicast service data packet sent on the configured downlink resource;
  • a second sending unit configured to receive the non-acknowledged NACK information sent by the UE, and send the retransmitted data packet of the data packet to the UE according to the NACK information.
  • the SPS data packet sending unit 202 includes:
  • the SPS resource command sending unit is configured to detect whether the configured downlink resource occurs in the MBMS transmission subframe, and when determining that the configured downlink resource occurs in the MBMS transmission subframe, send a PDCCH scheduling command for instructing the UE to release the SPS resource;
  • a dynamic scheduling unit configured to dynamically schedule a data packet that is originally scheduled to be transmitted on the configured downlink resource
  • the SPS resource reallocation unit is configured to re-send the SPS resource in the MBSFN subframe that does not conflict with the MBMS transmission, and send the data in the allocated SPS resource.
  • the SPS data packet sending unit 202 includes:
  • the resource invalidation command sending unit is configured to detect whether the configured downlink resource occurs in the MBMS transmission subframe, and when determining that the configured downlink resource occurs in the MBMS transmission subframe, send a PDCCH indicating that the downlink resource configured in the current MBSFN subframe configuration is invalid. Scheduling command;
  • a dynamic scheduling unit configured to dynamically schedule a data packet that is originally scheduled to be transmitted on the configured downlink resource
  • the SPS sending unit is configured to send unicast service data on the downlink semi-persistent scheduling resource that is subsequently configured.
  • the PDCCH scheduling command sent by the resource invalidation command sending unit has the following features: the PDCCH scheduling command carries a downlink control message DCI, and
  • the hybrid automatic retransmission HARQ process number in the DCI is set to a specific code point other than all 0s; or, the high MSB indicated by the MCS in the DCI is set to 1 and the MCS is not all 1; or
  • the redundancy version number RV in the DCI is set to a specific code point other than all 0s; or The resource indication in the DCI is set to all zeros.
  • the above-mentioned unit division of the SPS data packet transmitting unit 202 is only a preferred division manner. Of course, there may be other division manners, which are not described herein.
  • the UE receives the semi-persistent scheduling transmission data packet in the MBSFN subframe, and triggers the retransmission by the UE feedback or the base station indicates that the subframe does not receive the configured downlink transmission data packet, and implements the MBSFN in the MBSFN.
  • the semi-persistent scheduling of subframes transfers the correct transmission of data.
  • 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 present invention can be embodied in the form of a computer program product embodied on one or more computer-usable storage interfaces (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.
  • computer-usable storage interfaces 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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Abstract

本申请公开了一种实现半持续调度传输的方法及装置,用以通过MBSFN子帧实现半持续调度传输。本申请提供的一种实现半持续调度传输的方法包括:用户设备UE确定多媒体广播多播业务单频网MBSFN子帧;UE在MBSFN子帧接收SPS传输数据包。

Description

一种实现半持续调度传输的方法及装置
本申请要求在 2011年 4月 29日提交中国专利局、 申请号为 201110112001 .1、 发明名称 为"一种实现半持续调度传输的方法及装置"以及在 2011年 8月 1 日提交中国专利局、 申请号 为 201110218724.X、 发明名称为"一种实现半持续调度传输的方法及装置"的中国专利申请的 优先权, 其全部内容通过引用结合在本申请中。 技术领域 本发明涉及通信技术领域,尤其涉及一种实现半持续调度( Semi-Persistent Scheduling, SPS )传输的方法及装置。 背景技术 多媒体广播组播业务( Multimedia Broadcast/Multicast Service, MBMS )用于为无线小 区中用户提供多媒体广播和多播服务。 长期演进 (Long Term Evolution, LTE)系统中, 在 MBMS专用的频率层和与非 MBMS业务共享的频率层上都能够提供 MBMS。支持 MBMS 的 LTE小区可以是 MBMS专用小区, 也可以是 MBMS或单播混合小区。 MBMS业务可 以进行单小区传输, 也可以进行多小区传输。 MBMS的多小区传输需要支持多媒体广播多 播业务单频网 ( Multimedia Broadcast multicast service Single Frequency Network, MBSFN ) 传输方式。
所谓 MBSFN传输方式, 是指在同一时间以相同频率在多个小区进行同步传输。 使用 这种传输方式可以节约频率资源, 提高频谱利用率。 它要求多个小区将完全相同的内容同 时发送。 这样一来, 用户设备(User Equipment, UE )就能将多个 MBSFN小区视为一个 大的小区。 因此, UE 不仅不会受到相邻小区信号千扰, 而且将受益于来自多个 MBSFN 小区的信号的叠加。 MBMS专用小区和 MBMS或单播混合小区都可以釆用 MBSFN传输 方式。 另外, 如果利用先进的 UE接收机技术还能解决多径传播的时间差问题, 从而消除 小区内千扰。 这种多小区同频传输所带来的分集效果还可以解决盲区覆盖等问题, 增强接 收的可靠性, 提高覆盖率。
MBMS多小区传输的技术特点如下:
MBSFN域内 MBMS的同步传输;
支持多小区 MBMS传输的合并;
逻辑信道——多播业务信道(Multicast Traffic Channel , MTCH ) 和多播控制信道 ( Multicast Control Channel, MCCH ), 映射在用于点对多点 ( Point to Multi-point, PTM ) 传输的传输信道——多播信道(Multicast Channel, MCH ), 进而映射到物理信道——物理 多播信道( Physical Multicast Channel, PMCH );
MBSFN同步区域可以半静态配置,例如:通过运行和维护(Operations & Maintenance, 0&M )进行半静态配置;
MBSFN子帧前 1~2个符号是控制符号, 承载用于单播传输调度的 PDCCH, 后面部分 是数据域, 在有 MBMS业务发送时承载 PMCH。
与 MBMS传输相关的逻辑信道主要有: 广播控制信道(Broadcast Control Channel, BCCH )、 MCCH和 MTCH。
各信道的主要作用如下:
广播控制信道 BCCH ( Broadcast Control Channel ), 用于网络向 UE广播系统信息。 对 于 MBMS, 包括两部分广播消息传输:
系统信息块( System Information Block, SIB ) 2中指示的所有的 MBSFN子帧;
SIB 13调度通知( notification )子帧( notification机制用于 MCCH变更通知)和 MCCH, 该调度命令中包含传输 notification和 MCCH的 MBSFN子帧指示。
多播控制信道(Multicast Control Channel, MCCH )是一个点到多点的下行信道, 用 于网络向 UE传输该 MBSFN区域中 MBMS相关的控制信息, 一个 MCCH可以对应于一 个或多个 MTCH (即: 可以携带多个 MTCH的控制信息)。 MCCH可包括的信息有: 该 MBSFN区域的子帧分配和 PMCH (或 MCH ) 的配置信息等。 其中, PMCH (或 MCH ) 的配置信息,例如: MBMS 会话(session )信息、数据调制编码方案(Modulation and Coding Scheme, MCS ) 配置、 PMCH子帧位置和调度周期。
多播业务信道(Multicast Traffic Channel, MTCH ), 是一个点到多点的下行信道, 用 于网络向 UE发送具体的 MBMS业务数据。
网络利用 BCCH (包括 SIB2和 SIB13 )向 UE指示 MCCH的配置信息,再利用 MCCH 向 UE提供 PMCH或 MCH信息, UE在 PMCH或 MCH上读取具体业务的 MCH调度信息 ( MSI, MCH Scheduling Information ), 从而能够在 MTCH上接收 MBMS业务。 最终指示 用于 MBMS业务传输的 MBSFN子帧的是 MCH调度信息媒体接入控制的控制单元( MCH Scheduling Information MAC Control Element, MSI MAC CE )。
图 1示出了 MBMS业务区与 MBSFN同步区等的关系。
物理层协议已经规定 LTE版本 10 ( R10 ) 系统的 UE可以在 MBSFN子帧上接收物理 下行链路共享信道(Physical Downlink Shared Channel, PDSCH )传输的数据。 具体来说, 只有基站配置为传输模式 9 ( tm9 )的 UE可以在 MBSFN子帧上接收 PDSCH传输的数据, 包括半持续调度 ( semi-persistent scheduling, SPS ) 的下行传输数据。
半持续调度传输的特点是: 演进的基站(eNB , Evolved Node B )通过物理下行控制 信道(PDCCH )传输的调度命令, 将为 UE分配的半持续调度资源的信息通知给 UE, 其 中包括时频资源和传输格式(例如调制编码格式等)等信息, 从该半持续调度资源分配子 帧开始, 后续间隔固定周期的子帧的对应时频资源位置都预留给该 UE按照指定传输格式 进行数据传输, 而不再有 PDCCH命令指示, 这些不需要调度命令的半持续调度传输, 又 称为配置的下行传输 ( configured DL assignment )。 直至 eNB发送释放 SPS资源的 PDCCH 命令, 结束半持续调度传输。 参见图 2, 下面以下行半持续调度传输为例进行说明。
T1时刻: eNB在 T1时刻发送分配 SPS资源的 PDCCH命令,同时发送第一次下行 SPS 传输数据, 该 PDCCH携带有 SPS时频资源和传输格式的信息;
T2 T4时刻: 在每隔固定周期(T )的子帧上, UE在规定的时频资源上按照规定的传 输格式接收 SPS传输数据, 这些子帧上不再需要 PDCCH命令调度, 即 T2-T4上的 SPS 资源是预配置的下行资源, 这种下行传输即所谓的配置的下行传输;
T5时刻: eNB发送用于指示 UE释放 SPS资源的 PDCCH信息, 指示 UE释放原先分 配的 SPS资源, 以完成 SPS传输。
然而, 当前高层协议不支持 UE在 MBSFN子帧上接收 SPS传输数据, 因此现有技术 无法通过 MBSFN子帧实现半持续调度传输。 发明内容 本发明实施例提供了一种实现半持续调度传输的方法及装置, 用以通过 MBSFN子帧 实现半持续调度传输。
本发明实施例提供的一种实现半持续调度传输的方法包括:
用户设备 UE确定多媒体广播多播业务单频网 MBSFN子帧;
UE在 MBSFN子帧接收 SPS传输数据包。
本发明实施例提供的一种半实现半持续调度传输的方法包括:
演进的基站 eNB确定多媒体广播多播业务单频网 MBSFN子帧;
eNB在 MBSFN子帧发送 SPS传输数据包。
本发明实施例提供的一种实现半持续调度传输的装置包括:
MBSFN子帧确定单元, 用于确定多媒体广播多播业务单频网 MBSFN子帧;
SPS数据包接收单元, 用于在 MBSFN子帧接收 SPS传输数据包。
本发明实施例提供的一种实现半持续调度传输的装置包括:
MBSFN子帧确定单元, 用于确定多媒体广播多播业务单频网 MBSFN子帧; SPS数据包发送单元, 用于在 MBSFN子帧发送 SPS传输数据包。
本发明实施例, 通过用户设备 UE确定多媒体广播多播业务单频网 MBSFN子帧; UE 在 MBSFN子帧接收 SPS传输数据包, 从而通过 MBSFN子帧实现半持续调度传输。 附图说明 图 1为 MBMS相关区域示意图;
图 2为现有技术下行半持续调度传输示意图;
图 3为本发明实施例提供的一种实现半持续调度传输的方法的流程示意图; 图 4为本发明实施例提供的一种实现半持续调度传输的方法的流程示意图; 图 5为本发明实施例提供的方式一中半持续调度传输示意图;
图 6为本发明实施例提供的方式二中半持续调度传输示意图;
图 7为本发明实施例提供的实施例一中实现半持续调度传输的方法的流程示意图; 图 8为本发明实施例提供的实施例二中实现半持续调度传输的方法的流程示意图; 图 9为本发明实施例提供的实施例三中实现半持续调度传输的方法的流程示意图; 图 10为本发明实施例提供的实施例四中实现半持续调度传输的方法的流程示意图; 图 11为本发明实施例提供的一种实现半持续调度 SPS传输的装置的结构示意图; 图 12为本发明实施例提供的一种实现半持续调度 SPS传输的装置的结构示意图。 具体实施方式 本发明实施例提供了一种实现半持续调度传输的方法及装置, 用以在 MBSFN子帧上 实现半持续调度传输。
由于 MBSFN子帧可能传输 MBMS业务, 半持续调度资源可能和 MBMS传输资源位 于同一个子帧, 因此 MBMS业务传输可能与配置的下行传输冲突。 对于 UE来说, 如果没 有接收 MBMS业务, 无法预先确定配置的下行传输与 MBMS传输冲突。
因此, 本发明实施例中, UE在 MBSFN子帧尝试接收半持续调度传输数据, 若发生解 码错误 (即无法获取半持续调度传输数据 ), 则通过 UE反馈信息触发基站重新进行半持续 调度传输; 或者, 通过基站指示 UE在当前 MBSFN子帧不进行配置的下行传输的方式, 避免半持续调度传输所需资源与 MBMS传输所需资源为同一 MBSFN子帧,从而避免半持 续调度传输与 MBMS传输冲突, 在 MBSFN子帧上实现半持续调度的正确传输。
较佳地, 本发明实施例中所述的 UE, 是指配置为可以在 MBSFN子帧接收 PDSCH传 输数据的 UE, 具体的, 是指配置为传输模式 9的 UE。 下面结合附图给出本发明实施例的具体说明。
参见图 3 , 在 UE侧, 本发明实施例提供的一种实现半持续调度 SPS传输的方法, 包 括步骤:
5101、 用户设备 UE确定多媒体广播多播业务单频网 MBSFN子帧;
5102、 UE在 MBSFN子帧接收 SPS传输数据包。
可选地, 所述 UE在 MBSFN子帧接收 SPS传输数据包, 包括:
UE在 MBSFN子帧接收演进的基站 eNB在配置的下行资源( configured DL assignment ) 发送的承载在物理下行链路共享信道 PDSCH上的数据包, 并进行解码, 当解码错误时, 向 eNB发送非确认 NACK信息;
UE接收 eNB发送的所述数据包的重传数据包, 并与所述解码错误的数据包进行合并 解码, 以获取 PDSCH传输的单播业务数据。
可选地, 所述 UE在 MBSFN子帧接收 SPS传输数据包, 包括:
UE在 MBSFN子帧接收演进的基站 eNB在配置的下行资源发送的承载在物理下行链 路共享信道 PDSCH上的数据包, 并进行解码, 当解码错误时, 向演进的基站 eNB发送非 确认 NACK信息;
UE丢弃该数据包; 或者, UE判断是否需要丢弃该数据包, 如果是, 则丢弃该数据包, 否则保留该数据包;
UE接收 eNB发送的所述数据包的重传数据包, 并与所述解码错误的数据包进行合并 解码, 以获取 PDSCH传输的单播业务数据。
较佳地, 所述 UE丢弃该数据包, 包括:
UE确定当前正在接收 MBMS业务数据, 并且确知该配置的下行资源所在的子帧需要 传输 MBMS业务数据, 则丢弃通过该配置的下行资源接收的数据包;
所述 UE判断是否需要丢弃该数据包, 如果是, 则丢弃该数据包, 否则保留该数据包, 包括:
UE检测 UE特有参考信号 DM-RS或小区特有参考信号 CRS或信道状态信息参考信号 CSI-RS的信号强度,如果信号强度高于预设门限,则保留该数据包, 否则,丢弃该数据包。
可选地, 所述 UE在 MBSFN子帧接收 SPS传输数据包, 包括:
UE接收演进的基站 eNB发送的释放 SPS资源的物理下行控制信道 PDCCH调度命令; UE根据所述调度命令, 释放 SPS资源, 并且, 在当前 MBSFN子帧不接收下行单播 业务数据;
UE根据 eNB的调度, 接收原定在配置的下行资源上传输的数据包;
UE接收 eNB发送的 SPS资源分配命令, 并根据该命令确定后续配置的下行半持续调 度资源, 并接收下行单播业务数据。
可选地, 所述 UE在 MBSFN子帧接收 SPS传输数据包, 包括:
UE接收演进的基站 e B发送的当前 MBSFN子帧配置的下行资源无效的物理下行控 制信道 PDCCH调度命令, 并根据所述调度命令, 在当前 MBSFN子帧不接收下行单播业 务数据;
UE根据 eNB的调度, 接收原定在配置的下行资源上传输的数据包;
UE在后续配置的下行半持续调度资源时刻, 按照配置的时频资源, 接收下行单播业 务数据。
较佳地, 所述 PDCCH调度命令承载有下行控制消息 DCI, 并且,
所述 DCI中的混合自动重传 HARQ进程号设为除全 0以外的特定码点; 或者, 所述 DCI中的 MCS指示的高位 MSB设为 1 , 且 MCS不为全 1 ; 或者,
所述 DCI中的冗余版本号 RV设为除全 0以外的特定码点; 或者,
所述 DCI中的资源指示设为全 0。
参见图 4, 在 eNB侧, 本发明实施例提供的一种实现半持续调度 SPS传输的方法, 包 括步骤:
5201、 演进的基站 eNB确定多媒体广播多播业务单频网 MBSFN子帧;
5202、 eNB在 MBSFN子帧发送 SPS传输数据包。
可选地, 所述 eNB在 MBSFN子帧发送 SPS传输数据包, 包括:
eNB在 MBSFN子帧发送 SPS传输数据包给用户设备 UE, 其中, 所述 SPS传输数据 包包括在配置的下行资源上发送的单播业务数据包;
eNB接收 UE发送的非确认 NACK信息, 并根据该 NACK信息, 发送所述数据包的 重传数据包给 UE。
可选地, 所述 eNB在 MBSFN子帧发送 SPS传输数据包, 包括:
eNB检测配置的下行资源是否发生在 MBMS传输子帧, 当确定配置的下行资源发生 在 MBMS传输子帧时, 发送用于指示 UE释放 SPS资源的 PDCCH调度命令;
eNB动态调度原计划在配置的下行资源上传输的数据包;
eNB在不与 MBMS传输冲突的 MBSFN子帧重新进行 SPS资源分配,并在分配的 SPS 资源发送数据。
可选地, 所述 eNB在 MBSFN子帧发送 SPS传输数据包, 包括:
eNB检测配置的下行资源是否发生在 MBMS传输子帧, 当确定配置的下行资源发生 在 MBMS传输子帧时,发送用于指示当前 MBSFN子帧配置的下行资源无效的 PDCCH调 度命令; eNB动态调度原计划在配置的下行资源上传输的数据包;
eNB在后续配置的下行半持续调度资源上发送单播业务数据。
较佳地, 所述 PDCCH调度命令承载有下行控制消息 DCI, 并且,
所述 DCI中的混合自动重传 HARQ进程号设为除全 0以外的特定码点; 或者, 所述 DCI中的 MCS指示的高位 MSB设为 1 , 且 MCS不为全 1 ; 或者,
所述 DCI中的冗余版本号 RV设为除全 0以外的特定码点; 或者,
所述 DCI中的资源指示设为全 0。
也就是说, 本发明实施例中, 在 MBSFN子帧上实现半持续调度的正确传输的具体实 现方式有以下两种:
方式一: 通过 UE反馈信息触发基站重新进行半持续调度传输。
该方式具体又可以分为如下两种实现方式:
方式 A: UE在 MBSFN子帧, 通过对 PDSCH传输的数据包(下称第一次收到的数据 包)进行解码, 尝试获取 SPS的下行传输数据, 如果解码错误, 则反馈非确认(NACK ) 信息给 eNB; eNB收到 NACK信息后, 传输或重传原计划在配置的下行资源上发送的数 据包, 其中, 后续在传输或重传该数据包时, 釆用的是动态调度方式, 可以釆用基站调度 的任何资源; UE 收到后续的数据包后, 与第一次收到的数据包进行合并解码, 以解出 PDSCH传输的下行单播业务数据。 如果在达到预设的最大重传次数(例如 4次) 时, UE 都不能正确解码, 则丢弃第一次收到的数据包。
其中, UE不能正确解码第一次收到的数据包的原因有两种:
第一种: eNB传输的是单播业务数据包。
这种情况下 UE可以通过后续重传的数据包进行合并解码成功的可能性很大。
第二种: 由于当前 MBSFN子帧需要传输 MBMS业务, eNB在该 MBSFN子帧传输的 是 MBMS业务, 没有单播业务数据包传输。
这种情况下 UE如果用第一次收到的数据包与后续基站传输的单播业务数据包进行合 并解码, 相当于引入一个强千扰, 可能不能最终正确解码出单播业务数据包。
方式 B: UE在 MBSFN子帧, 通过对 PDSCH传输的数据包(下称第一次收到的数据 包)进行解码,尝试获取 SPS的下行传输数据,如果解码错误,则反馈 NACK信息给 eNB , 并直接丢弃该数据包, 或者, 判断是否需要丢弃该数据包, 如果是, 则丢弃该数据包, 否 则保留该数据包。
其中, 可以通过激活检测, 判断是否需要丢弃该数据包, 具体包括:
测量 UE特有的参考符号 ( demodulation reference signal, DM-RS )、 或小区参考符号 ( Cell-specific reference signal, CRS )、或信道 4夫态信息、参考符号 ( Channel- State Information reference signal, CSI-RS )的信号强度(可以是信号功率或幅度等的强度, 具体取决于实际 釆用的算法),确定当前 MBSFN子帧发送的数据包是单播业务数据包还是 MBMS数据包, 当符号强度大于预设的门限值时,确定当前 MBSFN子帧发送的数据包是单播业务数据包, 否则, 确定当前 MBSFN子帧发送的数据包是 MBMS数据包。 其中, 所述的门限值, 可以 根据实际需要进行设置, 是 UE可以确定的 eNB实际发送了上述参考符号的一个数值。 如 果确定当前 MBSFN子帧发送的数据包是 MBMS数据包, 则丢弃该数据包。如果确定当前 MBSFN子帧发送的数据包是单播业务数据包, 则保留该数据包。
如果 UE正在接收该 MBSFN子帧发送的 MBMS数据包, 则确定该 MBSFN子帧不可 能发送单播业务数据包, 则无需通过激活检测判断是否需要丢弃该数据包, 而直接丢弃该 数据包。
eNB收到 NACK反馈后, 传输或重传应该在配置的下行资源上发送的传输块; UE收 到后续的传输块后, 与第一次收到的数据包进行合并解码, 以解出 PDSCH传输的下行单 播业务数据包。 如果在达到预设的最大重传次数时, UE都不能正确解码, 则丢弃第一次 收到的数据包。
方式 B与方式 A的不同在于: UE可以丢弃在 MBSFN子帧接收到的不能解码的数据 包, 可以不与后续重传的数据包进行混合自动重传(HARQ )合并, 从而避免了在 MBMS 传输与 PDSCH传输冲突时, UE把 MBMS传输数据包当成单播业务数据包从而引入重传 合并的强千扰。 但是, 由于丢弃了第一次收到的数据包, 如果不是由于冲突造成的解码错 误, 会降低重传合并增益。
eNB可以确定某个 MBSFN子帧实际发送的是 MBMS数据包或者是单播业务数据包, 对于在 MBSFN子帧中没有实际发送单播业务数据包的情况下, 后续第一次重传时, 可以 釆用可自解码的冗余版本作为数据包的传输版本进行重传单播业务数据包。 更进一步, 如 果配置的半持续调度传输资源发生在 MBSFN子帧, eNB后续第一次重传单播业务数据包 时, 总是釆用可自解码的冗余版本。
方式二: eNB通过 PDCCH指示在当前 MBSFN子帧上不进行配置的下行传输, 即通 过 eNB指示 UE在当前 MBSFN子帧不存在 SPS的下行传输数据。
该方式具体也可以分为如下两种实现方式:
方式 C: eNB在当前 MBSFN子帧配置的下行传输与 MBMS传输冲突时,通过发送资 源释放指示的 PDCCH命令, 以使得 UE释放 SPS资源, 该命令还同时指示 UE释放后续 配置的下行资源 (即 UE释放所有的半持续调度分配资源); eNB后续重新进行 SPS资源 分配。如图 5所示,其中由于与 MBMS传输冲突未能发送的单播业务数据传输块 1 ,由 eNB 在当前 MB SFN子帧后釆用动态调度的方式进行传输。 方式 D: e B釆用特定的 PDCCH命令, 指示当前 MBSFN子帧不能用于配置的下行 传输, 但后续配置的下行资源仍然有效。 参见图 6, 其中, 由于与 MBMS传输冲突未能发 送的单播业务数据传输块 1 ,由 eNB在当前 MBSFN子帧后釆用动态调度的方式进行传输。
本发明实施例中, 用于指示配置的下行资源无效的 PDCCH, 有如下特点:
由 SPS 半持续调度小区无线网络临时标识 ( Semi-Persistent Scheduling Cell Radio Network Temporary Identifier, C-RNTI )对该 PDCCH进行加扰;
该 PDCCH携带的下行控制消息(DCI )的格式, 釆用特定码点, 以标识当前 MBSFN 子帧对应的配置的下行资源无效, 该特定码点为如下设计方式之一或多种设计方式的组 合:
HARQ进程号设为除全 0以外的一个预设的特定码点, 例如, 对于频分双工 ( FDD ) 系统, 设为 " 111" , 对于时分双工 (TDD ) 系统, 设为 " 1111" ; 或者,
MCS指示的高位最高位比特(Most Significant Bit, MSB )设为 " Γ , 且 MCS不为全 1 , 例如可以为 " 10000" ; 或者,
冗余版本(RV )号设置为除全 0以外的一个预设的特定码点,例如,可以设置为 " 11" ; 或者,
资源指示设置为全 0。
下面给出几个具体实施例的说明。
实施例一: UE在 MBSFN子帧接收配置的下行传输数据包,如果对该数据包解码错误, 则与后续重传数据包进行 HARQ合并解码。
参见图 7, 本发明实施例提供的一种通过 MBSFN子帧实现半持续调度传输的方法包 括:
步骤一: UE在 MBSFN子帧接收配置的下行传输数据包并解码,该下行传输数据包在 本子帧没有对应的 PDCCH调度指示。
步骤二: 如果解码错误, UE反馈 NACK信息给 e B。
步骤三: eNB接收反馈的 NACK信息, 组织该数据包的重传调度, 如果步骤一中配置 的下行传输子帧实际发送的是 MBMS数据包, eNB组织这次重传数据包时, 必须釆用可 以自解码的冗余版本, 例如 RV0。
步骤四: UE接收重传数据包, 该传输数据包是由 PDCCH调度命令调度的, 可以发生 在 MBSFN子帧或非 MBSFN子帧。
步骤五: UE将重传数据包和步骤一中收到的数据包进行重传合并解码。
如果解码仍不正确, 重复步骤二至步骤五, 直到解码正确或达到最大重传次数。
实施例二: UE在 MBSFN子帧接收配置的下行传输数据包,检测是否需要丢弃该数据 包, 根据需要与后续重传数据包进行 HARQ合并解码。
参见图 8, 本发明实施例提供的一种通过 MBSFN子帧实现半持续调度传输的方法包 括:
步骤一: UE在 MBSFN子帧接收配置的下行传输数据包并解码,该下行传输数据包在 本子帧没有对应的 PDCCH调度指示。
步骤二: 如果解码错误, UE反馈 NACK信息给 e B, 同时进行激活检测, 激活检测 方法为: 测量该子帧的 UE特有的参考符号 DM-RS ( demodulation reference signal )或小区 参考符号 CRS ( Cell-specific reference signal )或 CSI-RS ( Channel- State Information reference signal )的强度, 如果上述参考信号强度高于预设的门限值, 则认为当前 MBSFN子帧有单 播业务数据, 否则认为当前 MBSFN子帧没有单播业务数据。 如果通过激活检测认为当前 MBSFN子帧没有单播业务数据, 则丢弃该数据包。
步骤三: eNB接收反馈的 NACK信息, 组织该数据包的重传调度, 如果步骤一中配置 的下行传输子帧实际发送的是 MBMS数据包, eNB组织这次重传数据包时, 必须釆用可 以自解码的冗余版本, 例如 RV0。
步骤四: UE接收重传数据包, 该传输数据包是由 PDCCH调度命令调度的, 可以发生 在 MBSFN子帧或非 MBSFN子帧。
步骤五: 如果步骤一中接收的数据包通过激活检测没有丢弃, 则 UE将接收到的重传 数据包和步骤一中收到的数据包进行重传合并解码, 否则只对接收到的重传数据包进行解 码。
如果解码仍不正确, 重复步骤二至步骤五, 直到解码正确或达到最大重传次数。
实施例三: eNB在 MBMS传输与配置的下行资源冲突时释放 SPS资源。
参见图 9, 本发明实施例提供的一种通过 MBSFN子帧实现半持续调度传输的方法包 括:
步骤一: eNB检测配置的下行资源是否发生在 MBMS传输子帧, 当确定配置的下行 资源发生在 MBMS传输子帧时, 发送用于指示 UE释放 SPS资源的 PDCCH调度命令。
步骤二: UE接收用于指示 UE释放 SPS资源的 PDCCH调度命令, 然后释放 SPS资 源, 并在当前子帧上不接收配置的下行传输数据包。
步骤三: eNB在后续子帧动态调度原计划在配置的下行资源上传输的数据包。 其中, 所述动态调度, 即 eNB在选定子帧用一条 PDCCH命令指示 UE在该子帧的指定资源上用 指定传输格式接收下行传输数据。
步骤四: UE根据 eNB的动态调度接收下行数据, 完成对原计划在配置的下行资源上 传输的数据包的接收。 其中, 基站可以在任一子帧的任一资源上继续动态调度。
动态调度与半持续调度的不同之处在于, 动态调度使用一个 PDCCH调度命令调度一 次传输。
步骤五: e B在不与 MBMS传输冲突的 MBSFN子帧重新进行 SPS资源分配。
步骤六: UE接收 SPS资源分配命令, 按照该 SPS资源分配命令的指示进行后续 SPS 数据接收。
实施例四: eNB通过特定的 PDCCH命令通知当前 MBSFN子帧配置的下行资源无效。 参见图 10, 本发明实施例提供的一种通过 MBSFN子帧实现半持续调度传输的方法包 括:
步骤一: eNB检测配置的下行资源是否发生在 MBMS传输子帧, 当确定配置的下行 资源发生在 MBMS传输子帧时,发送用于指示当前 MBSFN子帧配置的下行资源无效的特 定的 PDCCH调度命令, 该特定的 PDCCH遵循方式 D中描述的设计原则。
步骤二: UE接收特定的 PDCCH调度命令, 在当前 MBSFN子帧不接收配置的下行传 输。
步骤三: eNB在后续 MBSFN子帧动态调度原计划在配置的下行资源上传输的数据包。 步骤四: UE根据 eNB调度接收下行数据, 完成对原计划在配置的下行资源上传输的 数据包的接收。
步骤五: UE在后续子帧继续按 SPS配置的时频资源接收配置的下行传输数据包。 本发明实施例提供的一种实现半持续调度 SPS传输的系统,包括 eNB和至少一个 UE。 在 UE侧, 参见图 11 , 本发明实施例提供的一种实现半持续调度 SPS传输的装置, 包 括:
MBSFN子帧确定单元 101 , 用于确定多媒体广播多播业务单频网 MBSFN子帧; SPS数据包接收单元 102, 用于在 MBSFN子帧接收 SPS传输数据包。
可选地, 所述 SPS数据包接收单元 102包括:
NACK反馈单元,用于在 MBSFN子帧接收演进的基站 eNB在配置的下行资源发送的 承载在物理下行链路共享信道 PDSCH上的数据包, 并进行解码, 当解码错误时, 向 eNB 发送非确认 NACK信息;
合并解码单元, 用于接收 eNB发送的所述数据包的重传数据包, 并与所述解码错误的 数据包进行合并解码, 以获取 PDSCH传输的单播业务数据。
可选地, 所述 SPS数据包接收单元 102包括:
NACK反馈单元,用于在 MBSFN子帧接收演进的基站 eNB在配置的下行资源发送的 承载在物理下行链路共享信道 PDSCH上的数据包, 并进行解码, 当解码错误时, 向演进 的基站 eNB发送非确认 NACK信息;
数据包丢弃处理单元, 用于丢弃该数据包; 或者, 判断是否需要丢弃该数据包, 如果 是, 则丢弃该数据包, 否则保留该数据包;
合并解码单元, 用于接收 eNB发送的所述数据包的重传数据包, 并与所述解码错误的 数据包进行合并解码, 以获取 PDSCH传输的单播业务数据。
较佳地, 所述数据包丢弃处理单元, 确定当前正在接收 MBMS 业务数据, 并且确知 该配置的下行资源所在的子帧需要传输 MBMS 业务数据, 则丢弃通过该配置的下行资源 接收的数据包;
或者,
所述数据包丢弃处理单元, 检测 UE特有参考信号 DM-RS或小区特有参考信号 CRS 或信道状态信息参考信号 CSI-RS 的信号强度, 如果信号强度高于预设门限, 则保留该数 据包, 否则, 丢弃该数据包。
可选地, 所述 SPS数据包接收单元 102包括:
释放 SPS资源命令接收单元, 用于接收演进的基站 eNB发送的释放 SPS资源的物理 下行控制信道 PDCCH调度命令;
释放 SPS资源单元, 用于根据所述调度命令, 释放 SPS资源, 并且, 在当前 MBSFN 子帧不接收下行单播业务数据;
数据包接收单元,用于根据 eNB的调度,接收原定在配置的下行资源上传输的数据包;
SPS接收单元,用于接收 eNB发送的 SPS资源分配命令, 并根据该命令确定后续配置 的下行半持续调度资源, 并接收下行单播业务数据。
可选地, 所述 SPS数据包接收单元 102包括:
资源无效命令接收处理单元,用于接收演进的基站 eNB发送的当前 MBSFN子帧配置 的下行资源无效的物理下行控制信道 PDCCH调度命令, 并根据所述调度命令, 在当前 MBSFN子帧不接收下行单播业务数据;
数据包接收单元,用于根据 eNB的调度,接收原定在配置的下行资源上传输的数据包; SPS接收单元, 用于在后续配置的下行半持续调度资源时刻, 按照配置的时频资源, 接收下行单播业务数据。
较佳地, 所述 PDCCH调度命令具有以下特征:
所述 PDCCH调度命令承载有下行控制消息 DCI , 并且,
所述 DCI中的混合自动重传 HARQ进程号设为除全 0以外的特定码点; 或者, 所述 DCI中的 MCS指示的高位 MSB设为 1 , 且 MCS不为全 1 ; 或者,
所述 DCI中的冗余版本号 RV设为除全 0以外的特定码点; 或者, 所述 DCI中的资源指示设为全 0。
资源无效命令接收处理单元, 通过上述特征, 确定接收到 eNB发送的当前 MBSFN子 帧配置的下行资源无效的 PDCCH调度命令。
上述各种对 SPS数据包接收单元 102的单元划分, 仅仅是一种较佳的划分方式, 当然 也可以有其他划分方式, 在此不予以赘述。
在 eNB侧, 参见图 12, 本发明实施例提供的一种实现半持续调度 SPS传输的装置, 包括:
MBSFN子帧确定单元 201 , 用于确定多媒体广播多播业务单频网 MBSFN子帧; SPS数据包发送单元 202 , 用于在 MBSFN子帧发送 SPS传输数据包。
可选地, 所述 SPS数据包发送单元 202包括:
第一发送单元, 用于在 MBSFN子帧发送 SPS传输数据包给用户设备 UE, 其中, 所 述 SPS传输数据包包括在配置的下行资源上发送的单播业务数据包;
第二发送单元, 用于接收 UE发送的非确认 NACK信息, 并根据该 NACK信息, 发 送所述数据包的重传数据包给 UE。
可选地, 所述 SPS数据包发送单元 202包括:
释放 SPS资源命令发送单元, 用于检测配置的下行资源是否发生在 MBMS传输子帧, 当确定配置的下行资源发生在 MBMS 传输子帧时, 发送用于指示 UE释放 SPS 资源的 PDCCH调度命令;
动态调度单元, 用于动态调度原计划在配置的下行资源上传输的数据包;
SPS资源重分配单元, 用于在不与 MBMS传输冲突的 MBSFN子帧重新进行 SPS资 源分配, 并在分配的 SPS资源发送数据。
可选地, 所述 SPS数据包发送单元 202包括:
资源无效命令发送单元, 用于检测配置的下行资源是否发生在 MBMS传输子帧, 当 确定配置的下行资源发生在 MBMS传输子帧时,发送用于指示当前 MBSFN子帧配置的下 行资源无效的 PDCCH调度命令;
动态调度单元, 用于动态调度原计划在配置的下行资源上传输的数据包;
SPS发送单元, 用于在后续配置的下行半持续调度资源上发送单播业务数据。
较佳地, 所述资源无效命令发送单元发送的所述 PDCCH调度命令具有如下特征: 所述 PDCCH调度命令承载有下行控制消息 DCI , 并且,
所述 DCI中的混合自动重传 HARQ进程号设为除全 0以外的特定码点; 或者, 所述 DCI中的 MCS指示的高位 MSB设为 1 , 且 MCS不为全 1 ; 或者,
所述 DCI中的冗余版本号 RV设为除全 0以外的特定码点; 或者, 所述 DCI中的资源指示设为全 0。
同理,上述各种对 SPS数据包发送单元 202的单元划分,仅仅是一种较佳的划分方式, 当然也可以有其他划分方式, 在此不予以赘述。
综上所述, 本发明实施例中, UE在 MBSFN子帧接收半持续调度传输数据包, 通过 UE反馈触发重传或基站指示该子帧不接收配置的下行传输数据包的方式, 实现在 MBSFN 子帧的半持续调度传输数据的正确传输。
本领域内的技术人员应明白, 本发明的实施例可提供为方法、 系统、 或计算机程序产 品。 因此, 本发明可釆用完全硬件实施例、 完全软件实施例、 或结合软件和硬件方面的实 施例的形式。 而且, 本发明可釆用在一个或多个其中包含有计算机可用程序代码的计算机 可用存储介盾 (包括但不限于磁盘存储器、 CD-ROM、 光学存储器等)上实施的计算机程 序产品的形式。
本发明是参照根据本发明实施例的方法、 设备(系统)、 和计算机程序产品的流程图 和 /或方框图来描述的。 应理解可由计算机程序指令实现流程图和 /或方框图中的每一流 程和 /或方框、 以及流程图和 /或方框图中的流程和 /或方框的结合。 可提供这些计算机 程序指令到通用计算机、 专用计算机、 嵌入式处理机或其他可编程数据处理设备的处理器 以产生一个机器, 使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用 于实现在流程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的 装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方 式工作的计算机可读存储器中, 使得存储在该计算机可读存储器中的指令产生包括指令装 置的制造品, 该指令装置实现在流程图一个流程或多个流程和 /或方框图一个方框或多个 方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上, 使得在计算机 或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理, 从而在计算机或其他 可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和 /或方框图一个 方框或多个方框中指定的功能的步骤。
尽管已描述了本发明的优选实施例, 但本领域内的技术人员一旦得知了基本创造性概 念, 则可对这些实施例作出另外的变更和修改。 所以, 所附权利要求意欲解释为包括优选 实施例以及落入本发明范围的所有变更和修改。
显然, 本领域的技术人员可以对本发明实施例进行各种改动和变型而不脱离本发明实 施例的精神和范围。 这样, 倘若本发明实施例的这些修改和变型属于本发明权利要求及其 等同技术的范围之内, 则本发明也意图包含这些改动和变型在内。

Claims

权 利 要 求
1、 一种实现半持续调度 SPS传输的方法, 其特征在于, 该方法包括:
用户设备 UE确定多媒体广播多播业务单频网 MBSFN子帧;
UE在 MBSFN子帧接收 SPS传输数据包。
2、根据权利要求 1所述的方法, 其特征在于, 所述 UE在 MBSFN子帧接收 SPS传输 数据包, 包括:
UE在 MBSFN子帧接收演进的基站 eNB在配置的下行资源发送的承载在物理下行链 路共享信道 PDSCH上的数据包, 并进行解码, 当解码错误时, 向 eNB发送非确认 NACK 信息;
UE接收 eNB发送的所述数据包的重传数据包,并与解码错误的数据包进行合并解码, 以获取 PDSCH传输的单播业务数据。
3、根据权利要求 1所述的方法, 其特征在于, 所述 UE在 MBSFN子帧接收 SPS传输 数据包, 包括:
UE在 MBSFN子帧接收演进的基站 eNB在配置的下行资源发送的承载在物理下行链 路共享信道 PDSCH上的数据包, 并进行解码, 当解码错误时, 向演进的基站 eNB发送非 确认 NACK信息;
UE丢弃 eNB发送的所述数据包; 或者, UE判断是否需要丢弃所述数据包, 如果是, 则丢弃所述数据包, 否则保留所述数据包;
UE接收 eNB发送的所述数据包的重传数据包,并与解码错误的数据包进行合并解码, 以获取 PDSCH传输的单播业务数据。
4、 根据权利要求 3所述的方法, 其特征在于, 所述 UE丢弃所述数据包, 包括:
UE确定当前正在接收 MBMS业务数据, 并且确知该配置的下行资源所在的子帧需要 传输 MBMS业务数据, 则丢弃通过该配置的下行资源接收的数据包;
所述 UE判断是否需要丢弃所述数据包, 如果是, 则丢弃所述数据包, 否则保留所述 数据包, 包括:
UE检测 UE特有参考信号 DM-RS或小区特有参考信号 CRS或信道状态信息参考信号 CSI-RS的信号强度, 如果信号强度高于预设门限, 则保留所述数据包, 否则, 丢弃所述数 据包。
5、根据权利要求 1所述的方法, 其特征在于, 所述 UE在 MBSFN子帧接收 SPS传输 数据包, 包括:
UE接收演进的基站 eNB发送的释放 SPS资源的物理下行控制信道 PDCCH调度命令; UE根据所述调度命令, 释放 SPS资源, 并且, 在当前 MBSFN子帧不接收下行单播 业务数据;
UE根据 eNB的调度, 接收原定在配置的下行资源上传输的数据包;
UE接收 eNB发送的 SPS资源分配命令, 并根据该命令确定后续配置的下行半持续调 度资源, 并接收下行单播业务数据。
6、根据权利要求 1所述的方法, 其特征在于, 所述 UE在 MBSFN子帧接收 SPS传输 数据包, 包括:
UE接收演进的基站 eNB发送的当前 MBSFN子帧配置的下行资源无效的物理下行控 制信道 PDCCH调度命令, 并根据所述调度命令, 在当前 MBSFN子帧不接收下行单播业 务数据;
UE根据 eNB的调度, 接收原定在配置的下行资源上传输的数据包;
UE在后续配置的下行半持续调度资源时刻, 按照配置的时频资源, 接收下行单播业 务数据。
7、根据权利要求 6所述的方法, 其特征在于, 所述 PDCCH调度命令承载有下行控制 消息 DCI, 并且,
所述 DCI中的混合自动重传 HARQ进程号设为除全 0以外的特定码点; 或者, 所述 DCI中的 MCS指示的高位 MSB设为 1 , 且 MCS不为全 1 ; 或者,
所述 DCI中的冗余版本号 RV设为除全 0以外的特定码点; 或者,
所述 DCI中的资源指示设为全 0。
8、 一种实现半持续调度 SPS传输的方法, 其特征在于, 该方法包括:
演进的基站 eNB确定多媒体广播多播业务单频网 MBSFN子帧;
eNB在 MBSFN子帧发送 SPS传输数据包。
9、 根据权利要求 8所述的方法, 其特征在于, 所述 eNB在 MBSFN子帧发送 SPS传 输数据包, 包括:
eNB在 MBSFN子帧发送 SPS传输数据包给用户设备 UE, 其中, 所述 SPS传输数据 包包括在配置的下行资源上发送的单播业务数据包;
eNB接收 UE发送的非确认 NACK信息, 并根据该 NACK信息, 发送所述数据包的 重传数据包给 UE。
10、 根据权利要求 8所述的方法, 其特征在于, 所述 eNB在 MBSFN子帧发送 SPS 传输数据包, 包括:
eNB检测配置的下行资源是否发生在 MBMS传输子帧, 当确定配置的下行资源发生 在 MBMS传输子帧时, 发送用于指示 UE释放 SPS资源的 PDCCH调度命令; eNB动态调度原计划在配置的下行资源上传输的数据包;
eNB在不与 MBMS传输冲突的 MBSFN子帧重新进行 SPS资源分配,并在分配的 SPS 资源发送数据。
11、根据权利要求 8所述的方法, 其特征在于, 所述 eNB在 MBSFN子帧发送 SPS传 输数据包, 包括:
eNB检测配置的下行资源是否发生在 MBMS传输子帧, 当确定配置的下行资源发生 在 MBMS传输子帧时,发送用于指示当前 MBSFN子帧配置的下行资源无效的 PDCCH调 度命令;
eNB动态调度原计划在配置的下行资源上传输的数据包;
eNB在后续配置的下行半持续调度资源上发送单播业务数据。
12、 根据权利要求 11所述的方法, 其特征在于, 所述 PDCCH调度命令承载有下行控 制消息 DCI, 并且,
所述 DCI中的混合自动重传 HARQ进程号设为除全 0以外的特定码点; 或者, 所述 DCI中的 MCS指示的高位 MSB设为 1 , 且 MCS不为全 1 ; 或者,
所述 DCI中的冗余版本号 RV设为除全 0以外的特定码点; 或者,
所述 DCI中的资源指示设为全 0。
13、 一种实现半持续调度 SPS传输的装置, 其特征在于, 该装置包括:
MBSFN子帧确定单元, 用于确定多媒体广播多播业务单频网 MBSFN子帧;
SPS数据包接收单元, 用于在 MBSFN子帧接收 SPS传输数据包。
14、 根据权利要求 13所述的装置, 其特征在于, 所述 SPS数据包接收单元包括: NACK反馈单元,用于在 MBSFN子帧接收演进的基站 eNB在配置的下行资源发送的 承载在物理下行链路共享信道 PDSCH上的数据包, 并进行解码, 当解码错误时, 向 eNB 发送非确认 NACK信息;
合并解码单元, 用于接收 eNB发送的所述数据包的重传数据包, 并与解码错误的数据 包进行合并解码, 以获取 PDSCH传输的单播业务数据。
15、 根据权利要求 13所述的装置, 其特征在于, 所述 SPS数据包接收单元包括: NACK反馈单元,用于在 MBSFN子帧接收演进的基站 eNB在配置的下行资源发送的 承载在物理下行链路共享信道 PDSCH上的数据包, 并进行解码, 当解码错误时, 向演进 的基站 eNB发送非确认 NACK信息;
数据包丢弃处理单元, 用于丢弃 eNB发送的所述数据包; 或者, 判断是否需要丢弃所 述数据包, 如果是, 则丢弃所述数据包, 否则保留所述数据包;
合并解码单元, 用于接收 eNB发送的所述数据包的重传数据包, 并与解码错误的数据 包进行合并解码, 以获取 PDSCH传输的单播业务数据。
16、 根据权利要求 15所述的装置, 其特征在于,
所述数据包丢弃处理单元, 确定当前正在接收 MBMS 业务数据, 并且确知该配置的 下行资源所在的子帧需要传输 MBMS 业务数据, 则丢弃通过该配置的下行资源接收的数 据包;
或者,
所述数据包丢弃处理单元, 检测 UE特有参考信号 DM-RS或小区特有参考信号 CRS 或信道状态信息参考信号 CSI-RS 的信号强度, 如果信号强度高于预设门限, 则保留所述 数据包, 否则, 丢弃所述数据包。
17、 根据权利要求 13所述的装置, 其特征在于, 所述 SPS数据包接收单元包括: 释放 SPS资源命令接收单元, 用于接收演进的基站 e B发送的释放 SPS资源的物理 下行控制信道 PDCCH调度命令;
释放 SPS资源单元, 用于根据所述调度命令, 释放 SPS资源, 并且, 在当前 MBSFN 子帧不接收下行单播业务数据;
数据包接收单元,用于根据 eNB的调度,接收原定在配置的下行资源上传输的数据包; SPS接收单元,用于接收 eNB发送的 SPS资源分配命令, 并根据该命令确定后续配置 的下行半持续调度资源, 并接收下行单播业务数据。
18、 根据权利要求 13所述的装置, 其特征在于, 所述 SPS数据包接收单元包括: 资源无效命令接收处理单元,用于接收演进的基站 eNB发送的当前 MBSFN子帧配置 的下行资源无效的物理下行控制信道 PDCCH调度命令, 并根据所述调度命令, 在当前 MBSFN子帧不接收下行单播业务数据;
数据包接收单元,用于根据 eNB的调度,接收原定在配置的下行资源上传输的数据包; SPS接收单元, 用于在后续配置的下行半持续调度资源时刻, 按照配置的时频资源, 接收下行单播业务数据。
19、根据权利要求 18所述的装置, 其特征在于, 所述 PDCCH调度命令承载有下行控 制消息 DCI, 并且,
所述 DCI中的混合自动重传 HARQ进程号设为除全 0以外的特定码点; 或者, 所述 DCI中的 MCS指示的高位 MSB设为 1 , 且 MCS不为全 1 ; 或者,
所述 DCI中的冗余版本号 RV设为除全 0以外的特定码点; 或者,
所述 DCI中的资源指示设为全 0。
20、 一种实现半持续调度 SPS传输的装置, 其特征在于, 该装置包括:
MBSFN子帧确定单元, 用于确定多媒体广播多播业务单频网 MBSFN子帧; SPS数据包发送单元, 用于在 MBSFN子帧发送 SPS传输数据包。
21、 根据权利要求 20所述的装置, 其特征在于, 所述 SPS数据包发送单元包括: 第一发送单元, 用于在 MBSFN子帧发送 SPS传输数据包给用户设备 UE, 其中, 所 述 SPS传输数据包包括在配置的下行资源上发送的单播业务数据包;
第二发送单元, 用于接收 UE发送的非确认 NACK信息, 并根据该 NACK信息, 发 送所述数据包的重传数据包给 UE。
22、 根据权利要求 20所述的装置, 其特征在于, 所述 SPS数据包发送单元包括: 释放 SPS资源命令发送单元, 用于检测配置的下行资源是否发生在 MBMS传输子帧, 当确定配置的下行资源发生在 MBMS 传输子帧时, 发送用于指示 UE释放 SPS 资源的
PDCCH调度命令;
动态调度单元, 用于动态调度原计划在配置的下行资源上传输的数据包;
SPS资源重分配单元, 用于在不与 MBMS传输冲突的 MBSFN子帧重新进行 SPS资 源分配, 并在分配的 SPS资源发送数据。
23、 根据权利要求 20所述的装置, 其特征在于, 所述 SPS数据包发送单元包括: 资源无效命令发送单元, 用于检测配置的下行资源是否发生在 MBMS传输子帧, 当 确定配置的下行资源发生在 MBMS传输子帧时,发送用于指示当前 MBSFN子帧配置的下 行资源无效的 PDCCH调度命令;
动态调度单元, 用于动态调度原计划在配置的下行资源上传输的数据包;
SPS发送单元, 用于在后续配置的下行半持续调度资源上发送单播业务数据。
24、根据权利要求 23所述的装置, 其特征在于, 所述 PDCCH调度命令承载有下行控 制消息 DCI, 并且,
所述 DCI中的混合自动重传 HARQ进程号设为除全 0以外的特定码点; 或者, 所述 DCI中的 MCS指示的高位 MSB设为 1 , 且 MCS不为全 1 ; 或者,
所述 DCI中的冗余版本号 RV设为除全 0以外的特定码点; 或者,
所述 DCI中的资源指示设为全 0。
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