WO2018059149A1 - 单小区多播业务接收和发送方法、以及用户设备和基站 - Google Patents

单小区多播业务接收和发送方法、以及用户设备和基站 Download PDF

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Publication number
WO2018059149A1
WO2018059149A1 PCT/CN2017/097509 CN2017097509W WO2018059149A1 WO 2018059149 A1 WO2018059149 A1 WO 2018059149A1 CN 2017097509 W CN2017097509 W CN 2017097509W WO 2018059149 A1 WO2018059149 A1 WO 2018059149A1
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information
mcch
npdcch
mtch
time
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PCT/CN2017/097509
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English (en)
French (fr)
Inventor
张崇铭
刘仁茂
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夏普株式会社
张崇铭
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Application filed by 夏普株式会社, 张崇铭 filed Critical 夏普株式会社
Priority to MX2019003536A priority Critical patent/MX2019003536A/es
Priority to EP17854601.6A priority patent/EP3522652A4/en
Priority to US16/337,335 priority patent/US10856262B2/en
Publication of WO2018059149A1 publication Critical patent/WO2018059149A1/zh
Priority to CONC2019/0004130A priority patent/CO2019004130A2/es

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/0073—Allocation arrangements that take into account other cell interferences
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality

Definitions

  • NB-IoT NarrowBand IOT
  • LTE Long Term Evolution Project
  • NB-IoT narrowband Internet of Things
  • the NB-IoT is set to operate in a narrowband system of 180KHz uplink and downlink.
  • the first phase of the NB-IoT system has completed basic functional design, including broadcast notification of system information, point-to-point unicast uplink data transmission, and downlink data reception.
  • the 3GPP RAN#72 plenary meeting held in June 2016 confirmed the purpose of enhancing NB-IoT and achieving multicast.
  • New work items see Non-Patent Document: RP-161324 New work item proposal: Enhancements of NB-IoT), clearly indicating that many of the NB-IoT systems are implemented based on the existing 13 versions of LTE SC-PTM features. Broadcast transmission.
  • SC-PTM Single-Cell Point-To-Multipoint
  • SC-MCCH Single-Cell Multicast Control Channel
  • SC-MTCH Single-Cell Multicast Traffic Channel
  • Layer channel DL-SCH Downlink Share Channel
  • the SC-MCCH is a control channel, and the information carried by the SC-MCCH includes: a multicast service type performed by the current cell, and a scheduling and receiving configuration of a service channel SC-MTCH for the service operation; the SC-MTCH is a service channel, which carries a specific Business content.
  • the transmission of the SC-MCCH channel is indicated by the DCI on the NPDCCH.
  • the time-frequency resource, the coding information, and the like of the SC-MCCH transmission are indicated in the DCI, and the terminal may receive the SC-MCCH channel according to the indication of the DCI, thereby acquiring information transmitted on the SC-MCCH. Therefore, the receiving SC-MCCH includes two parts. First, the NPDCCH that schedules the SC-MCCH is received, and secondly, the information transmitted on the SC-MCCH is received according to the DCI indication information on the NPDCCH.
  • the information transmitted on the SC-MCCH includes configuration information of the SC-MTCH channel in which various types of MBMS services are located, and the configuration information is used to receive information transmitted on the SC-MTCH channel.
  • the transmission of the SC-MTCH channel is indicated by the DCI on the NPDCCH.
  • the time-frequency resources in which the NPDCCH appears are provided by information on the SC-MCCH channel.
  • the terminal first monitors whether there is an NPDCCH for scheduling the SC-MTCH on the corresponding time-frequency resource, and specifically includes: first receiving the corresponding NPDCCH common search space, and then searching whether there is an NPDCCH scrambled by the RNTI corresponding to the SC-MTCH, if yes, It performs decoding and extracts DCI information carried by the NPDCCH.
  • the time-frequency resource, the coding information, and the like of the SC-MTCH transmission are indicated in the DCI, and the terminal may receive the SC-MTCH channel according to the indication of the DCI, thereby acquiring information transmitted on the SC-MTCH. Therefore, the receiving SC-MTCH includes two parts. First, the NPDCCH that schedules the SC-MTCH is received, and secondly, the information transmitted on the SC-MTCH is received according to the DCI indication information on the NPDCCH.
  • the terminal that is interested in the multicast service first learns the scheduling and configuration of the SC-MCCH channel through the content broadcasted on the system message block SIB20, and specifically includes the time when the NPDCCH of the SC-MCCH is scheduled to occur, and the terminal further monitors and detects the corresponding time. NPDCCH.
  • the SC-MCCH information may be changed during the transmission of the MBMS service.
  • the reason for the change may be the increase of new services, or the end of the old service, or the SC-MTCH of a certain service.
  • the configuration has changed.
  • the SC-MCCH information change notification is issued on the network side.
  • the SC-MCCH information change notification is carried in the NPDCCH and occurs only at the appointed time.
  • the PDCCH carrying the change notification in the LTE system always appears in the same subframe as the PDCCH scheduling the SC-MCCH; in the NB-IoT In the system, the SC-MCCH information change notification may be different from the NPDCCH scheduling the SC-MCCH, or included in the NPDCCH of the scheduled SC-MCCH, or included in the paging channel. Therefore, the terminal that receives the MBMS service only needs to monitor whether there is an NPDCCH or a paging message carrying the SC-MCCH information change notification at the corresponding time.
  • the terminal reception is based on a narrowband design, and the downlink reception bandwidth is only 180 kHz, that is, the bandwidth of one carrier.
  • the SC-MCCH and SC-MTCH channels can be configured on different carriers, how the terminal receives the SC-MTCH channel and how to obtain the SC-MCCH channel change notification is a problem to be solved. .
  • the present disclosure proposes the following technical solutions.
  • a method performed at a user equipment UE comprising: receiving a single cell multicast control channel SC-MCCH related information; receiving a single cell multicast service according to the received SC-MCCH related information Channel SC-MTCH related information; monitoring SC-MCCH information change notification for indicating whether the SC-MCCH transmission information is changed; and monitoring when the monitoring of the SC-MCCH information change notification conflicts with the reception of the SC-MTCH related information SC-MCCH information change notification.
  • the step of receiving SC-MCCH related information includes: listening to and receiving a first narrowband physical downlink control channel NPDCCH, where the first NPDCCH carries downlink control information DCI for indicating SC-MCCH scheduling information; And receiving SC-MCCH transmission information according to the SC-MCCH scheduling information.
  • the step of receiving SC-MTCH related information according to the received SC-MCCH related information includes: listening to and receiving a second NPDCCH according to the SC-MCCH transmission information, where the second NPDCCH is carried For indicating SC-MTCH scheduling information DCI; and receiving SC-MTCH transmission information according to the SC-MTCH scheduling information.
  • the SC-MCCH information change notification is caused by the DCI indication carried by the first NPDCCH
  • the interception of the SC-MCCH information change notification and the reception of the SC-MTCH related information includes any of the following cases: The subframe or time at which the first NPDCCH is monitored and the subframe or time at which the second NPDCCH is monitored are collided; the subframe or time at which the first NPDCCH is monitored and the subframe or time at which the SC-MTCH transmission information is received collide.
  • the SC-MCCH information change notification is indicated by the DCI carried by the third NPDCCH, and the monitoring of the SC-MCCH information change notification conflicts with the reception of the SC-MTCH related information, including any of the following situations:
  • the subframe or time of the three NPDCCH conflicts with the subframe or time at which the second NPDCCH is monitored; the subframe or time at which the third NPDCCH is monitored and the subframe or time at which the SC-MTCH transmission information is received collide.
  • a user equipment UE including: a transceiver configured to: receive a single cell multicast control channel SC-MCCH related information; receive a single cell according to received SC-MCCH related information Multicast traffic channel SC-MTCH related information; and monitoring SC-MCCH information change notification for indicating whether the SC-MCCH transmission information is changed; the detecting unit is configured to: detect the SC-MCCH information change notification monitoring and SC- Whether the reception of the MTCH related information conflicts; wherein the transceiver is further configured to: when the detecting unit detects that the monitoring of the SC-MCCH information change notification conflicts with the reception of the SC-MTCH related information, the SC-MCCH information change is monitored. Notice.
  • the transceiver is further configured to: listen to and receive a first narrowband physical downlink control channel NPDCCH, the first NPDCCH carrying downlink control information DCI for indicating SC-MCCH scheduling information; Receiving SC-MCCH transmission information according to the SC-MCCH scheduling information.
  • the transceiver is further configured to: listen to and receive a second NPDCCH according to the SC-MCCH transmission information, where the second NPDCCH carries a DCI for indicating SC-MTCH scheduling information; And according to the SC-MTCH scheduling information, Receive SC-MTCH transmission information.
  • the SC-MCCH information change notification is caused by the DCI indication carried by the first NPDCCH
  • the interception of the SC-MCCH information change notification and the reception of the SC-MTCH related information includes any of the following cases: The subframe or time at which the first NPDCCH is monitored and the subframe or time at which the second NPDCCH is monitored are collided; the subframe or time at which the first NPDCCH is monitored and the subframe or time at which the SC-MTCH transmission information is received collide.
  • the SC-MCCH information change notification is indicated by the DCI carried by the third NPDCCH, and the monitoring of the SC-MCCH information change notification conflicts with the reception of the SC-MTCH related information, including any of the following situations:
  • the subframe or time of the three NPDCCH conflicts with the subframe or time at which the second NPDCCH is monitored; the subframe or time at which the third NPDCCH is monitored and the subframe or time at which the SC-MTCH transmission information is received collide.
  • a method performed at a base station comprising: transmitting a single cell multicast control channel SC-MCCH related information; transmitting a single cell multicast traffic channel SC-MTCH related information, the SC - MTCH related information is scheduled according to the SC-MCCH related information; determining whether transmission of the SC-MCCH information change notification indicating whether the SC-MCCH transmission information has changed and whether the transmission of the SC-MTCH related information conflicts; and when determining When the transmission of the SC-MCCH information change notification collides with the transmission of the SC-MTCH related information, the SC-MTCH related information transmitted at the collision time is resent after the collision is completed.
  • the step of transmitting SC-MCCH related information includes: transmitting a first narrowband physical downlink control channel NPDCCH, the first NPDCCH carrying downlink control information DCI for indicating SC-MCCH scheduling information; and transmitting The SC-MCCH transmits information, and the SC-MCCH transmission information is scheduled according to the SC-MCCH scheduling information.
  • the transmitting the SC-MTCH related information includes: transmitting a second NPDCCH carrying a DCI indicating SC-MTCH scheduling information; and transmitting SC-MTCH transmission information,
  • the SC-MTCH transmission information is scheduled according to the SC-MTCH scheduling information.
  • the SC-MCCH information change notification is caused by the DCI indication carried by the first NPDCCH
  • the transmission of the SC-MCCH information change notification conflicts with the transmission of the SC-MTCH related information includes any of the following cases: The subframe or time at which the first NPDCCH is transmitted and the subframe or time at which the second NPDCCH is transmitted collide; the subframe or time at which the first NPDCCH is transmitted conflicts with the subframe or time at which the SC-MTCH transmission information is transmitted.
  • the SC-MCCH information change notification is indicated by the DCI carried by the third NPDCCH
  • the transmission of the SC-MCCH information change notification conflicts with the transmission of the SC-MTCH related information includes any of the following cases: The subframe or time of the three NPDCCH conflicts with the subframe or time at which the second NPDCCH is transmitted; the subframe or time at which the third NPDCCH is transmitted conflicts with the subframe or time at which the SC-MTCH transmission information is transmitted.
  • the SC-MTCH related information that is sent after the conflict is retransmitted and includes the following: sending a second NPDCCH, where the DCI carried by the second NPDCCH indicates SC- sent at the time of conflict.
  • the MTCH transmission information is transmitted for scheduling SC-MTCH scheduling information; all or part of the SC-MTCH transmission information transmitted at the time of collision is retransmitted.
  • a base station including: a transceiver configured to: transmit a single cell multicast control channel SC-MCCH related information; and transmit a single cell multicast traffic channel SC-MTCH related information, The SC-MTCH related information is scheduled according to the SC-MCCH related information; and the determining unit is configured to: determine to send the SC-MCCH information change notification for indicating whether the SC-MCCH transmission information is changed, and the SC-MTCH Whether the transmission of the related information conflicts, wherein the transceiver is further configured to: when the determining unit determines that the transmission of the SC-MCCH information change notification conflicts with the transmission of the SC-MTCH related information, resend the conflict time after the conflict ends SC-MTCH related information sent.
  • the transceiver is further configured to: send a first narrowband physical downlink control channel NPDCCH, the first NPDCCH carries downlink control information DCI for indicating SC-MCCH scheduling information; and send the SC - MCCH transmission information, the SC-MCCH transmission information is scheduled according to the SC-MCCH scheduling information
  • the transceiver is further configured to: transmit a second NPDCCH, the second NPDCCH carries DCI for indicating SC-MTCH scheduling information; and send SC-MTCH transmission information, the SC - MTCH transmission information according to the SC-MTCH scheduling information scheduling.
  • the SC-MCCH information change notification is caused by the DCI indication carried by the first NPDCCH
  • the transmission of the SC-MCCH information change notification conflicts with the transmission of the SC-MTCH related information includes any of the following cases: The subframe or time at which the first NPDCCH is transmitted and the subframe or time at which the second NPDCCH is transmitted collide; the subframe or time at which the first NPDCCH is transmitted conflicts with the subframe or time at which the SC-MTCH transmission information is transmitted.
  • the SC-MCCH information change notification is indicated by the DCI carried by the third NPDCCH
  • the transmission of the SC-MCCH information change notification conflicts with the transmission of the SC-MTCH related information includes any of the following cases: The subframe or time of the three NPDCCH conflicts with the subframe or time at which the second NPDCCH is transmitted; the subframe or time at which the third NPDCCH is transmitted conflicts with the subframe or time at which the SC-MTCH transmission information is transmitted.
  • the transceiver is further configured to: send a second NPDCCH, the DCI carried by the second NPDCCH indicating SC-MTCH scheduling scheduling transmission of SC-MTCH transmission information transmitted at a conflicting moment Scheduling information; or all or part of resending SC-MTCH transmission information sent at the time of collision.
  • various embodiments of the present disclosure provide a solution when the monitoring of the SC-MCCH channel change notification conflicts with the reception of the SC-MTCH channel. Based on the solution, the terminal can obtain the change information notification and the changed SC-MCCH in time when the conflict occurs, and at the same time, after the conflict ends, the terminal re-receives the SC-MTCH transmission information transmitted during the collision to avoid information omission.
  • FIG. 1 illustrates a flow chart of a method performed at a UE, in accordance with an exemplary embodiment of the present disclosure
  • FIG. 2 shows a schematic structural diagram of a UE according to an exemplary embodiment of the present disclosure
  • FIG. 3 illustrates a flow diagram of a method performed at a base station in accordance with an exemplary embodiment of the present invention
  • FIG. 4 shows a schematic structural diagram of a base station according to an exemplary embodiment of the present invention.
  • the LTE mobile communication system and its subsequent evolved version are taken as an example application environment
  • the base station and the UE (user equipment) supporting the NB-IoT are taken as an example, and various embodiments according to the present disclosure are specifically described.
  • the present disclosure is not limited to the following embodiments, but can be applied to more other wireless communication systems, such as future 5G cellular communication systems, and can be applied to other base stations and UEs, for example, supporting eMTC (enhanced) Base station and UE such as Machine-Type Communication, Enhanced Machine Type Communication, MMTC (Massive Machine-Type Communication).
  • SC-PTM Single-cell point-to-multipoint
  • SC-MCCH Single-Cell Multicast Control Channel
  • SC-MTCH Single-Cell Multicast Traffic Channel
  • NPDCCH Narrowband Physical Downlink Control Channel
  • DCI Downlink Control Information
  • Downstream control information Downstream control information
  • MBMS Session Identity Multimedia Broadcast Multicast Service Session Identity
  • UE terminal
  • terminal device terminal device
  • FIG. 1 schematically illustrates a flow diagram of a method 100 performed at a UE, in accordance with an exemplary embodiment of the present disclosure.
  • step S101 the UE receives SC-MCCH related information.
  • the UE that is interested in the multicast service first learns the configuration information of the SC-PTM control channel SC-MCCH through the content that is broadcast on the system message block SIB20 or is notified to the UE through the dedicated signaling, and specifically includes The timing at which the NPDCCH (herein referred to as the first NPDCCH) of the SC-MCCH is scheduled to occur.
  • the transmission of the SC-MCCH channel is indicated by the DCI on the first NPDCCH.
  • the time-frequency resources that may be generated by the first NPDCCH may also be predefined by the network side.
  • the UE may listen to the first NPDCCH at the corresponding moment, and specifically includes: first receiving the NPDCCH common search space, and then searching whether there is a first NPDCCH scrambled by the RNTI corresponding to the SC-MCCH, and if yes, decoding, extracting the first
  • the DCI carried by an NPDCCH is used to obtain SC-MCCH scheduling information indicated by the DCI.
  • the DCI carried on the first NPDCCH channel indicates SC-MCCH scheduling information, including time-frequency resources of the SC-MCCH transmission, coding information, and optionally, the number of repetitions of the SC-MCCH transmission, and the like, and the UE may indicate according to the DCI.
  • the SC-MCCH scheduling information is used to receive the SC-MCCH channel, thereby acquiring information transmitted on the SC-MCCH channel, also referred to as SC-MCCH transmission information. Therefore, the receiving SC-MCCH includes two parts. First, the first NPDCCH is monitored and received. The first NPDCCH carries DCI for indicating SC-MCCH scheduling information. Second, the SC-MCCH is received according to the SC-MCCH scheduling information. The information transmitted on the channel, that is, the SC-MCCH transmission information.
  • step S103 the UE receives SC-MTCH related information according to the received SC-MCCH related information.
  • the SC-MCCH transmission information includes configuration information of an SC-MTCH channel in which various types of MBMS services are located, and the configuration information is used to receive SC-MTCH channel transmission information (referred to as receiving SC-MTCH channel or receiving SC-MTCH for short).
  • SC-MTCH channel transmission information referred to as receiving SC-MTCH channel or receiving SC-MTCH for short.
  • the transmission of the SC-MTCH channel is scheduled by the DCI on another NPDCCH (herein referred to as the second NPDCCH).
  • the time-frequency resources that may occur in the second NPDCCH are provided by information transmitted on the SC-MCCH channel (ie, SC-MCCH transmission information).
  • the UE may receive the SC-MTCH channel according to the SC-MTCH scheduling information indicated by the DCI, thereby acquiring information transmitted on the SC-MTCH channel, which is also referred to as SC-MTCH transmission information. Therefore, the receiving SC-MTCH includes two parts. First, the second NPDCCH is monitored and received, and the second NPDCCH carries information for indicating SC-MTCH scheduling. The DCI; secondly, the information transmitted on the SC-MTCH channel, that is, the SC-MTCH transmission information, is received according to the SC-MTCH scheduling information.
  • the SC-MCCH transmission information may change during the transmission of the MBMS service.
  • the reason for the change may be the increase of new services, the end of the old service, or the change of the SC-MTCH configuration of a certain service. Therefore, the SC-MCCH
  • the network side transmits an SC-MCCH information change notification indicating whether the SC-MCCH transmission information has changed to the UE.
  • the SC-MCCH information change notification is carried in the NPDCCH and appears only at a predetermined time.
  • the SC-MCCH information change notification may be present at a different time than the NPDCCH scheduling the SC-MCCH, or included in the NPDCCH of the scheduled SC-MCCH, or included in the paging channel. Therefore, the UE that receives the MBMS service only needs to monitor whether there is an NPDCCH or a paging message carrying the SC-MCCH information change notification at the corresponding time.
  • the method 100 may further comprise a step S105 in which the UE listens for an SC-MCCH information change notification.
  • the time-frequency resource that may be generated by the SC-MCCH information change notification may be predefined by the network side or notified to the UE in the configuration information of the SC-MCCH, and the UE needs to monitor and receive the SC-MCCH information change notification at the corresponding moment. Indicates whether the SC-MCCH transmission information has changed.
  • the carrier transmitting the SC-MTCH is different from the carrier transmitting the SC-MCCH and the carrier indicating the SC-MCCH change notification, when the terminal continuously receives the SC-MTCH, the monitoring and receiving of the SC-MCCH information change notification and the pair are performed. There may be a conflict between the reception of SC-MTCH related information.
  • step S107 when the monitoring of the SC-MCCH information change notification collides with the reception of the SC-MTCH related information, the UE selects to monitor the SC-MCCH information change notification.
  • the UE may receive the SC based on the changed SC-MCCH transmission information.
  • MTCH related information is a part of the SC-MCCH transmission information.
  • the SC-MCCH information change notification may be indicated by a DCI carried in another NPDCCH (herein referred to as a third NPDCCH), and the time or resource at which the third NPDCCH may occur may be predefined by the network side, or Notifying the UE in the SC-MCCH configuration information, The UE is required to listen to the third NPDCCH at the corresponding time to confirm whether the SC-MCCH information is changed.
  • a third NPDCCH another NPDCCH
  • the time or resource at which the third NPDCCH may occur may be predefined by the network side, or Notifying the UE in the SC-MCCH configuration information, The UE is required to listen to the third NPDCCH at the corresponding time to confirm whether the SC-MCCH information is changed.
  • the UE may choose to listen to the third NPDCCH, that is, abandon receiving the SC-MTCH related information, and go to the intercept and receive the third NPDCCH.
  • the receiving of the SC-MTCH related information includes two parts: the monitoring and receiving of the second NPDCCH and the receiving of the SC-MTCH transmission information, and therefore, monitoring the subframe or time of the third NPDCCH and receiving the SC-MTCH related information.
  • the collision of the subframe or the time may include any one of the following: the subframe or the time at which the third NPDCCH is monitored and the subframe or the time at which the second NPDCCH is monitored are collided; the subframe or the time of the third NPDCCH is monitored and the SC-MTCH is received.
  • the subframe or time at which the information is transmitted conflicts.
  • the UE may continue to receive the SC-MTCH related information. Specifically, in a case where a subframe or a time at which the third NPDCCH is monitored and a subframe or a time at which the second NPDCCH is received are collided, the UE may continue to receive the second NPDCCH and receive the SC-MTCH transmission information; while listening to the third NPDCCH In the case where the subframe or the time and the subframe or time at which the SC-MTCH transmission information is received collide, the UE may continue to receive the SC-MTCH transmission information.
  • the UE needs to further acquire the changed SC-MCCH transmission information.
  • the UE receives the changed SC-MCCH transmission information according to the SC-MCCH scheduling information indicated by the DCI carried by the first NPDCCH. Further, the UE monitors and receives the second NPDCCH according to the received changed SC-MCCH transmission information, and receives the SC-MTCH transmission information according to the SC-MTCH scheduling information indicated by the DCI carried by the second NPDCCH.
  • the terminal needs to further receive the SC-MCCH information, because the carrier transmitting the SC-MTCH is different from the carrier transmitting the SC-MCCH, Therefore, when the terminal continuously receives the SC-MTCH, it is possible to receive the SC-MCCH related information and the SC-MTCH related information. There will be conflicts.
  • the UE selects to receive the SC-MCCH related information at the conflicting subframe or time, that is, abandons the receiving SC. -MTCH related information, to receive information about SC-MCCH.
  • the receiving of the SC-MCCH related information includes two parts: the listening and receiving of the first NPDCCH and the receiving of the SC-MCCH transmission information; and the receiving of the SC-MTCH related information also includes two parts: the monitoring of the second NPDCCH And reception and reception of SC-MTCH transmission information. Therefore, the subframe or time at which the SC-MCCH related information is received may be in conflict with the subframe or time at which the SC-MTCH related information is received, or may be any one of the following four cases:
  • the subframe or time at which the SC-MCCH channel is received conflicts with the subframe or time at which the second NPDCCH is monitored;
  • the subframe or time at which the SC-MCCH channel is received collides with the subframe or time at which the SC-MTCH transmission information is received.
  • the SC-MTCH related information may continue to be received. Specifically, the subframe or the time at which the first NPDCCH is monitored and the subframe or the time at which the second NPDCCH is monitored are collided, or the subframe or the time at which the SC-MCCH transmission information is received conflicts with the subframe or the time at which the second NPDCCH is monitored. In the case that after the UE completes the reception of the SC-MCCH transmission information, the UE may continue to monitor and receive the second NPDCCH and receive the SC-MTCH transmission information; and monitor the subframe or time of the first NPDCCH and receive the SC-MTCH transmission information.
  • the UE may continue after receiving the SC-MCCH. Receive the SC-MTCH channel.
  • the SC-MCCH information change notification may be indicated by the DCI that is used by the first NPDCCH to indicate the SC-MCCH scheduling information, and the time or resource that the first NPDCCH may appear may be predefined by the network side.
  • the UE is notified to the UE in the configuration information of the SC-MCCH, and the UE is required to listen to the first NPDCCH at the corresponding moment to obtain the SC-MCCH scheduling information and the SC-MCCH information change notification.
  • the UE selects to receive the first NPDCCH, that is, abandons the SC-MTCH related information, in the conflicting subframe or time. Go to listen and receive the first NPDCCH.
  • the conflict between the monitoring of the SC-MCCH information change notification and the reception of the SC-MTCH related information may include any of the following cases:
  • the subframe or time at which the first NPDCCH is monitored and the subframe or time at which the second NPDCCH is monitored are collided;
  • the subframe or time at which the first NPDCCH is monitored and the subframe or time at which the SC-MTCH transmission information is received collide.
  • the UE may continue to receive the SC-MTCH related information. Specifically, in a case that a subframe or a time at which the first NPDCCH is monitored and a subframe or a time at which the second NPDCCH is monitored is collided, the UE may continue to monitor and receive the second NPDCCH and receive the SC-MTCH transmission information; In the case where the subframe or time of the NPDCCH collides with the subframe or time at which the SC-MTCH transmission information is intercepted, the UE may continue to receive the SC-MTCH transmission information.
  • the UE continues to carry according to the received first NPDCCH.
  • the SC-MCCH scheduling information indicated by the DCI receives the changed SC-MCCH transmission information. Further, the UE monitors and receives the second NPDCCH according to the received changed SC-MCCH transmission information, and receives the SC-MTCH transmission information according to the SC-MTCH scheduling information indicated by the DCI carried by the second NPDCCH.
  • the terminal monitors the NPDCCH for scheduling the SC-MTCH; when the terminal is configured to listen to the NPDCCH for the SC-MCCH information change notification on another carrier starting from the subframe time n, the terminal does not start from the subframe time n.
  • the NPDCCH for scheduling the SC-MTCH is monitored, and the NPDCCH for the SC-MCCH information change notification is monitored according to the configuration.
  • the terminal may start from the subframe time n-k, and listen to the NPDCCH for the SC-MCCH information change notification on another carrier, where k is the terminal receiving and switching from one carrier to another. The required conversion time is received on the outer carrier.
  • the terminal can stop the running SC-PTM discontinuous reception timer.
  • the terminal receives the NPDSCH channel carrying the SC-MTCH information, and the transmission of the channel occupies N consecutive subframes, and the subframes for transmitting the SC-MCCH information change notification on the other carrier are not included in the subframes.
  • the terminal listens to the NPDCCH for the SC-MCCH information change notification according to the configuration, for example, the configuration in the SC-MCCH transmission information, or the network side predefined configuration.
  • the terminal may maintain the running SC-PTM discontinuous reception timer. If the timer expires, and the information on the x subframes in the N subframes has not been received yet, the terminal discards the received Nx subframes. On the content.
  • FIG. 2 shows a schematic structural diagram of a UE 200 according to an exemplary embodiment of the present invention.
  • the UE 200 includes a transceiver 201 and a detecting unit 203.
  • the transceiver 201 and detection unit 203 associated with the present invention are shown in the UE 200 of FIG. 2 to avoid obscuring the present invention.
  • a UE in accordance with an embodiment of the present invention also includes other units that make up the UE.
  • the UE 200 can be configured to perform a method for receiving a single cell multicast service, such as the method 100 shown in FIG. 1, in accordance with various embodiments of the present invention.
  • the UE 200 may receive the SC-MCCH related information by using the transceiver 201 in step S101; receive the SC-MTCH related information according to the received SC-MCCH related information in step S103; and monitor the SC-MCCH transmission information in step S105. Whether the SC-MCCH information change notification has been changed.
  • the transceiver 201 monitors and receives the first NPDCCH, where the first NPDCCH includes downlink control information DCI for indicating SC-MCCH scheduling information, and receives according to the SC-MCCH scheduling information.
  • the SC-MCCH transmits information.
  • step S103 the transceiver 201 monitors and connects according to the SC-MCCH transmission information.
  • the UE 200 can use the detecting unit 203 to detect whether or not the monitoring of the SC-MCCH information change notification indicating whether the SC-MCCH transmission information has changed and the reception of the SC-MTCH related information collide.
  • the detecting unit 203 detects that the monitoring of the SC-MCCH information change notification collides with the reception of the SC-MTCH related information
  • the transceiver 201 selects to monitor the SC-MCCH information change notification in step S107.
  • the transceiver 201 After completing the monitoring and reception of the SC-MCCH information change notification when the monitoring of the SC-MCCH information change notification collides with the reception of the SC-MTCH related information, the transceiver 201 receives the SC based on the changed SC-MCCH transmission information. -MTCH related information.
  • the SC-MCCH information change notification may be indicated by the DCI carried by the third NPDCCH.
  • the interception of the SC-MCCH information change notification and the reception of the SC-MTCH related information includes any of the following situations: monitoring a subframe or time of the first NPDCCH and a subframe or time of monitoring the second NPDCCH. Collision; the subframe or time at which the first NPDCCH is monitored and the subframe or time at which the SC-MTCH transmission information is received collide.
  • the SC-MCCH information change notification is indicated by the DCI carried by the first NPDCCH.
  • the interception of the SC-MCCH information change notification and the reception of the SC-MTCH related information includes any of the following situations: monitoring a subframe or time of the first NPDCCH and a subframe or time of monitoring the second NPDCCH. Collision; the subframe or time at which the first NPDCCH is monitored and the subframe or time at which the SC-MTCH transmission information is received collide.
  • FIG. 3 schematically illustrates a flow diagram of a method 300 performed at a base station, in accordance with an exemplary embodiment of the present disclosure.
  • the base station transmits SC-MCCH related information to the UE. Specifically, the base station sends a first NPDCCH, where the first NPDCCH carries downlink control information DCI for indicating SC-MCCH scheduling information, and sends SC-MCCH transmission information, where the SC-MCCH transmission information is according to the SC-MCCH Scheduling information scheduling.
  • step S303 the base station sends SC-MTCH related information to the UE, and the SC-MTCH related information is scheduled according to the SC-MCCH related information.
  • the base station sends the second NPDCCH, the second NPDCCH carries a DCI for indicating SC-MTCH scheduling information; and transmits SC-MTCH transmission information, the SC-MTCH transmission information is scheduled according to the SC-MTCH scheduling information.
  • step S305 the base station determines whether or not the transmission of the SC-MCCH information change notification indicating whether the SC-MCCH transmission information has changed and the transmission of the SC-MTCH related information collide.
  • the SC-MCCH information change notification may be indicated by the DCI carried by the first NPDCCH.
  • the transmission of the SC-MCCH information change notification and the transmission of the SC-MTCH related information include any of the following cases: the subframe or the time at which the first NPDCCH is transmitted and the subframe or time at which the second NPDCCH is transmitted occurs. Collision; a subframe or time at which the first NPDCCH is transmitted and a subframe or time at which the SC-MTCH transmission information is transmitted collide.
  • the SC-MCCH information change notification is indicated by the DCI carried by the third NPDCCH.
  • the conflict between the transmission of the SC-MCCH information change notification and the transmission of the SC-MTCH related information includes any of the following cases: the subframe or time at which the third NPDCCH is transmitted and the subframe or time at which the second NPDCCH is transmitted occur. Collision; a subframe or time at which the third NPDCCH is transmitted conflicts with a subframe or time at which the SC-MTCH transmission information is transmitted.
  • the base station resends the SC-MTCH related information transmitted at the conflicting time after the collision ends, specifically including the following A: transmitting a second NPDCCH, where the DCI carried by the second NPDCCH indicates SC-MTCH scheduling information for scheduling transmission of SC-MTCH transmission information transmitted at a conflicting time; all or part of resending SC-transmitted at a conflicting moment MTCH transmits information.
  • FIG. 4 shows a schematic structural diagram of a base station 400 according to an exemplary embodiment of the present invention.
  • the base station 400 is a transceiver 401 and a determining unit 403.
  • the base station 400 can be configured to perform a method for transmitting a single cell multicast service, such as the method 300 shown in FIG. 3, in accordance with various embodiments of the present invention.
  • the base station 400 can transmit the SC-MCCH related information in step S301 by using the transceiver 401; and transmit SC-MTCH related information in accordance with the SC-MCCH related information, in step S303.
  • the transceiver 401 transmits a first NPDCCH, the first NPDCCH carries downlink control information DCI for indicating SC-MCCH scheduling information, and sends SC-MCCH transmission information, where the SC-MCCH transmits information. Scheduling information according to the SC-MCCH scheduling information.
  • step S303 the transceiver 401 transmits a second NPDCCH, the second NPDCCH carries a DCI for indicating SC-MTCH scheduling information, and transmits SC-MTCH transmission information according to the SC-MTCH. Scheduling information scheduling.
  • the SC-MCCH information change notification may be indicated by the DCI carried by the first NPDCCH.
  • the transmission of the SC-MCCH information change notification and the transmission of the SC-MTCH related information include any of the following cases: the subframe or the time at which the first NPDCCH is transmitted and the subframe or time at which the second NPDCCH is transmitted occurs. Collision; a subframe or time at which the first NPDCCH is transmitted and a subframe or time at which the SC-MTCH transmission information is transmitted collide.
  • the SC-MCCH information change notification is indicated by the DCI carried by the third NPDCCH.
  • the conflict between the transmission of the SC-MCCH information change notification and the transmission of the SC-MTCH related information includes any of the following cases: the subframe or time at which the third NPDCCH is transmitted and the subframe or time at which the second NPDCCH is transmitted occur. Collision; a subframe or time at which the third NPDCCH is transmitted conflicts with a subframe or time at which the SC-MTCH transmission information is transmitted.
  • the base station 400 can determine whether or not the transmission of the SC-MCCH information change notification indicating whether the SC-MCCH transmission information has changed and the transmission of the SC-MTCH related information collide with the determination unit 403 in step S305.
  • the base station 400 retransmits the SC-MTCH related information transmitted at the collision time after the collision ends in the step S307 by the transceiver 401.
  • the method includes the following: sending a second NPDCCH, where the second NPDCCH carries The DCI indicates SC-MTCH scheduling information that schedules transmission of SC-MTCH transmission information transmitted at the time of collision; all or part of the SC-MTCH transmission information transmitted at the time of collision is retransmitted.
  • the program running on the device according to the present invention may be a program that causes a computer to implement the functions of the embodiments of the present invention by controlling a central processing unit (CPU).
  • the program or information processed by the program may be temporarily stored in a volatile memory (such as a random access memory RAM), a hard disk drive (HDD), a non-volatile memory (such as a flash memory), or other memory system.
  • a program for realizing the functions of the embodiments of the present invention can be recorded on a computer readable recording medium.
  • the corresponding functions can be realized by causing a computer system to read programs recorded on the recording medium and execute the programs.
  • the so-called "computer system” herein may be a computer system embedded in the device, and may include an operating system or hardware (such as a peripheral device).
  • the "computer readable recording medium” may be a semiconductor recording medium, an optical recording medium, a magnetic recording medium, a recording medium of a short-term dynamic storage program, or any other recording medium readable by a computer.
  • circuitry e.g., monolithic or multi-chip integrated circuits.
  • Circuitry designed to perform the functions described in this specification can include general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic devices, discrete Gate or transistor logic, discrete hardware components, or any combination of the above.
  • DSPs digital signal processors
  • ASICs application specific integrated circuits
  • FPGAs field programmable gate arrays
  • a general purpose processor may be a microprocessor or any existing processor, controller, microcontroller, or state machine.
  • the above circuit may be a digital circuit or an analog circuit.
  • One or more embodiments of the present invention may also be implemented using these new integrated circuit technologies in the context of new integrated circuit technologies that have replaced existing integrated circuits due to advances in semiconductor technology.
  • the present invention is not limited to the above embodiment. Although various examples of the embodiments have been described, the invention is not limited thereto.
  • Fixed or non-mobile electronic devices installed indoors or outdoors can be used as terminal devices or communication devices such as AV devices, kitchen devices, cleaning devices, air conditioners, office equipment, vending machines, and other home appliances.

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Abstract

本公开提供了一种在UE处执行的方法，包括：接收单小区多播控制信道SC-MCCH相关信息；根据接收的SC-MCCH相关信息来接收单小区多播业务信道SC-MTCH相关信息；监听用于指示SC-MCCH传输信息是否发生变更的SC-MCCH信息变更通知；以及当SC-MCCH信息变更通知的监听与SC-MTCH相关信息的接收发生冲突时，监听SC-MCCH信息变更通知。本公开还提供了在基站处执行的方法，以及分别执行上述方法的UE和基站。

Description

单小区多播业务接收和发送方法、以及用户设备和基站 技术领域
本发明涉及无线通信技术领域，具体地，涉及单小区多播业务接收方法和执行该方法的用户设备、以及单小区多播业务发送方法和执行该方法的基站。
背景技术
随着移动通信的快速增长和技术的巨大进步，世界将走向一个完全互联互通的网络社会，即任何人或任何东西在任何时间和任何地方都可以获得信息和共享数据。预计到2020年，互联设备的数量将达到500亿部，其中仅有100亿部左右可能是手机和平板电脑，其它的则不是与人对话的机器，而是彼此对话的机器。因此，如何设计系统以更好地支持万物互联是一项需要深入研究的课题。
为了更好地实现万物互联，在2015年9月举行的3GPP RAN#69全会上，第三代合作伙伴计划(3GPP)的长期演进项目(LTE)的标准中提出了一个新的工作项目(参见非专利文献：RP-151621New Work Item：NarrowBand IOT(NB-IoT))，其可被称之为窄带物联网(NB-IoT)。在该项目的描述中，为了实现物联网终端的低功耗、长待机、降成本、广覆盖等要求，NB-IoT被设置为工作在上下行180KHz的窄带系统。第一阶段的NB-IoT系统已完成了基本的功能设计，包括系统信息的广播通知、点对点的单播上行数据发送和下行数据接收等。考虑到未来物联网中存在软件下载、终端系统升级以及分组信息的传递等多播需求，在2016年6月举行的3GPP RAN#72全会上确定了以增强NB-IoT、实现多播为目的的新的工作项目(参见非专利文献：RP-161324 New work item proposal：Enhancements of NB-IoT)，明确指出在现有的13版本的LTE SC-PTM特性的基础上实现NB-IoT系统中的多播传输。
在现有的LTE系统中，SC-PTM(Single-Cell Point-To-Multipoint，单小区点对多点)是指在单小区内的进行的多媒体广播业务的多播传输。该特 性引入了两条逻辑信道SC-MCCH(Single-Cell Multicast Control Channel，单小区多播控制信道)和SC-MTCH(Single-Cell Multicast Traffic Channel，单小区多播业务信道)，它们复用在传输层信道DL-SCH(Downlink Share Channel，下行链路共享信道)上。其中，SC-MCCH为控制信道，其携带的信息包括：当前小区进行的多播业务类型，以及该业务工作的业务信道SC-MTCH的调度和接收配置；SC-MTCH为业务信道，其携带具体的业务内容。
在NB-IoT系统中，SC-MCCH信道的传输由NPDCCH上的DCI来调度指示的。在DCI中指示了SC-MCCH传输的时频资源、编码信息等，终端可以根据该DCI的指示来接收SC-MCCH信道，从而获取SC-MCCH上传输的信息。因此接收SC-MCCH包括两部分，首先，接收调度SC-MCCH的NPDCCH，其次，根据NPDCCH上的DCI指示信息去接收SC-MCCH上传输的信息。
SC-MCCH上传输的信息包含了各类MBMS业务所在的SC-MTCH信道的配置信息，该配置信息用于接收SC-MTCH信道上传播的信息。在NB-IoT系统中，SC-MTCH信道的传输由NPDCCH上的DCI来调度指示的。NPDCCH出现的时频资源由SC-MCCH信道上的信息提供。终端首先在对应的时频资源上监听是否有调度SC-MTCH的NPDCCH，具体包括首先接收相应的NPDCCH公共搜索空间，然后搜索是否有SC-MTCH对应的RNTI加扰的NPDCCH，如果存在，则对其进行解码，提取NPDCCH携带的DCI信息。在DCI中指示了SC-MTCH传输的时频资源、编码信息等等，终端可以根据该DCI的指示来接收SC-MTCH信道，从而获取SC-MTCH上传输的信息。因此接收SC-MTCH包括两部分，首先，接收调度SC-MTCH的NPDCCH，其次，根据NPDCCH上的DCI指示信息去接收SC-MTCH上传输的信息。
对多播业务感兴趣的终端首先通过系统消息块SIB20上广播的内容，获知SC-MCCH信道的调度和配置，具体包括调度SC-MCCH的NPDCCH出现的时刻，终端进而在对应时刻去监听检测该NPDCCH。
SC-MCCH信息在MBMS业务传输的过程中可能发生变更，变更的原因可能是新业务的增加，或者老业务的结束，或者某项业务的SC-MTCH 配置发生变化。当SC-MCCH信息发生或者即将发生变更时，网络侧会发布SC-MCCH信息变更通知。SC-MCCH信息变更通知携带在NPDCCH中，且仅在约定的时刻出现，例如，LTE系统中携带变更通知的PDCCH总是和调度SC-MCCH的PDCCH出现在相同的子帧内；在NB-IoT系统中，SC-MCCH信息变更通知可以和调度SC-MCCH的NPDCCH出现在不同的时刻，或者是包含在调度SC-MCCH的NPDCCH中，或者是包含在寻呼信道中。因此，在接收MBMS业务的终端，只需要在相应的时刻去监听是否有携带SC-MCCH信息变更通知的NPDCCH或者寻呼消息即可。
在NB-IoT系统中，为了节约成本，终端接收基于窄带设计，下行接收带宽只有180kHz，即一个载波的带宽。但是，在增强的NB-IoT系统中，SC-MCCH和SC-MTCH信道可以配置在不同的载波上，终端如何接收SC-MTCH信道以及如何获得SC-MCCH信道的变更通知，是需要解决的问题。
发明内容
为了解决目前NB-IoT系统中存在的如何接收SC-MTCH信道以及如何获得SC-MCCH信道的变更通知的技术问题，本公开提出了以下技术方案。
根据本公开的一方面，提供了一种在用户设备UE处执行的方法，包括：接收单小区多播控制信道SC-MCCH相关信息；根据接收的SC-MCCH相关信息来接收单小区多播业务信道SC-MTCH相关信息；监听用于指示SC-MCCH传输信息是否发生变更的SC-MCCH信息变更通知；以及当SC-MCCH信息变更通知的监听与SC-MTCH相关信息的接收发生冲突时，监听SC-MCCH信息变更通知。
在一个示例性实施例中，接收SC-MCCH相关信息的步骤包括：监听并接收第一窄带物理下行控制信道NPDCCH，所述第一NPDCCH携带用于指示SC-MCCH调度信息的下行控制信息DCI；以及根据所述SC-MCCH调度信息，接收SC-MCCH传输信息。
在一个示例性实施例中，根据接收的SC-MCCH相关信息来接收SC-MTCH相关信息的步骤包括：根据所述SC-MCCH传输信息，监听并接收第二NPDCCH，所述第二NPDCCH携带用于指示SC-MTCH调度信息的 DCI；以及根据所述SC-MTCH调度信息，接收SC-MTCH传输信息。
在一个示例性实施例中，SC-MCCH信息变更通知由第一NPDCCH携带的所述DCI指示，以及SC-MCCH信息变更通知的监听与SC-MTCH相关信息的接收发生冲突包括以下任一情况：监听第一NPDCCH的子帧或时刻和监听第二NPDCCH的子帧或时刻发生冲突；监听第一NPDCCH的子帧或时刻和接收SC-MTCH传输信息的子帧或时刻发生冲突。
在一个示例性实施例中，SC-MCCH信息变更通知由第三NPDCCH携带的DCI指示，以及SC-MCCH信息变更通知的监听与SC-MTCH相关信息的接收发生冲突包括以下任一情况：监听第三NPDCCH的子帧或时刻和监听第二NPDCCH的子帧或时刻发生冲突；监听第三NPDCCH的子帧或时刻和接收SC-MTCH传输信息的子帧或时刻发生冲突。
在一个示例性实施例中，所述方法还包括：在完成当SC-MCCH信息变更通知的监听与SC-MTCH相关信息的接收发生冲突时对SC-MCCH信息变更通知的监听和接收之后，根据变更后的SC-MCCH传输信息来接收SC-MTCH相关信息。
根据本公开的另一方面，提供了一种用户设备UE，包括：收发机，被配置为：接收单小区多播控制信道SC-MCCH相关信息；根据接收的SC-MCCH相关信息来接收单小区多播业务信道SC-MTCH相关信息；以及监听用于指示SC-MCCH传输信息是否发生变更的SC-MCCH信息变更通知；检测单元，被配置为：检测SC-MCCH信息变更通知的监听与SC-MTCH相关信息的接收是否发生冲突；其中所述收发机还被配置为：当检测单元检测到SC-MCCH信息变更通知的监听与SC-MTCH相关信息的接收发生冲突时，监听SC-MCCH信息变更通知。
在一个示例性实施例中，所述收发机进一步被配置为：监听并接收第一窄带物理下行控制信道NPDCCH，所述第一NPDCCH携带用于指示SC-MCCH调度信息的下行控制信息DCI；以及根据所述SC-MCCH调度信息，接收SC-MCCH传输信息。
在一个示例性实施例中，所述收发机进一步被配置为：根据所述SC-MCCH传输信息，监听并接收第二NPDCCH，所述第二NPDCCH携带用于指示SC-MTCH调度信息的DCI；以及根据所述SC-MTCH调度信息， 接收SC-MTCH传输信息。
在一个示例性实施例中，SC-MCCH信息变更通知由第一NPDCCH携带的所述DCI指示，以及SC-MCCH信息变更通知的监听与SC-MTCH相关信息的接收发生冲突包括以下任一情况：监听第一NPDCCH的子帧或时刻和监听第二NPDCCH的子帧或时刻发生冲突；监听第一NPDCCH的子帧或时刻和接收SC-MTCH传输信息的子帧或时刻发生冲突。
在一个示例性实施例中，SC-MCCH信息变更通知由第三NPDCCH携带的DCI指示，以及SC-MCCH信息变更通知的监听与SC-MTCH相关信息的接收发生冲突包括以下任一情况：监听第三NPDCCH的子帧或时刻和监听第二NPDCCH的子帧或时刻发生冲突；监听第三NPDCCH的子帧或时刻和接收SC-MTCH传输信息的子帧或时刻发生冲突。
在一个示例性实施例中，所述接收机还被配置为：在完成当SC-MCCH信息变更通知的监听与SC-MTCH相关信息的接收发生冲突时对SC-MCCH信息变更通知的监听和接收之后，根据变更后的SC-MCCH传输信息来接收SC-MTCH相关信息。
根据本公开的另一方面，提供了一种在基站处执行的方法，包括：发送单小区多播控制信道SC-MCCH相关信息；发送单小区多播业务信道SC-MTCH相关信息，所述SC-MTCH相关信息根据所述SC-MCCH相关信息调度；确定用于指示SC-MCCH传输信息是否发生变更的SC-MCCH信息变更通知的发送与SC-MTCH相关信息的发送是否发生冲突；以及当确定SC-MCCH信息变更通知的发送与SC-MTCH相关信息的发送发生冲突时，在冲突结束后重新发送冲突时刻发送的SC-MTCH相关信息。
在一个示例性实施例中，发送SC-MCCH相关信息的步骤包括：发送第一窄带物理下行控制信道NPDCCH，所述第一NPDCCH携带用于指示SC-MCCH调度信息的下行控制信息DCI；以及发送SC-MCCH传输信息，所述SC-MCCH传输信息根据所述SC-MCCH调度信息调度。
在一个示例性实施例中，发送SC-MTCH相关信息的步骤包括：发送第二NPDCCH，所述第二NPDCCH携带用于指示SC-MTCH调度信息的DCI；以及发送SC-MTCH传输信息，所述SC-MTCH传输信息根据所述SC-MTCH调度信息调度。
在一个示例性实施例中，SC-MCCH信息变更通知由第一NPDCCH携带的所述DCI指示，以及SC-MCCH信息变更通知的发送与SC-MTCH相关信息的发送发生冲突包括以下任一情况：发送第一NPDCCH的子帧或时刻和发送第二NPDCCH的子帧或时刻发生冲突；发送第一NPDCCH的子帧或时刻和发送SC-MTCH传输信息的子帧或时刻发生冲突。
在一个示例性实施例中，SC-MCCH信息变更通知由第三NPDCCH携带的DCI指示，以及SC-MCCH信息变更通知的发送与SC-MTCH相关信息的发送发生冲突包括以下任一情况：发送第三NPDCCH的子帧或时刻和发送第二NPDCCH的子帧或时刻发生冲突；发送第三NPDCCH的子帧或时刻和发送SC-MTCH传输信息的子帧或时刻发生冲突。
在一个示例性实施例中，在冲突结束后重新发送冲突时刻发送的SC-MTCH相关信息包括以下之一：发送第二NPDCCH，所述第二NPDCCH携带的DCI指示对在冲突时刻发送的SC-MTCH传输信息的发送进行调度的SC-MTCH调度信息；全部或者部分重新发送在冲突时刻发送的SC-MTCH传输信息。
根据本公开的另一方面，提供了一种基站，包括：收发机，被配置为：发送单小区多播控制信道SC-MCCH相关信息；以及发送单小区多播业务信道SC-MTCH相关信息，所述SC-MTCH相关信息根据所述SC-MCCH相关信息调度；以及确定单元，被配置为：确定用于指示SC-MCCH传输信息是否发生变更的SC-MCCH信息变更通知的发送与SC-MTCH相关信息的发送是否发生冲突，其中所述收发机还被配置为：当确定单元确定SC-MCCH信息变更通知的发送与SC-MTCH相关信息的发送发生冲突时，在冲突结束后重新发送冲突时刻发送的SC-MTCH相关信息。
在一个示例性实施例中，所述收发机进一步被配置为：发送第一窄带物理下行控制信道NPDCCH，所述第一NPDCCH携带用于指示SC-MCCH调度信息的下行控制信息DCI；以及发送SC-MCCH传输信息，所述SC-MCCH传输信息根据所述SC-MCCH调度信息调度
在一个示例性实施例中，所述收发机进一步被配置为：发送第二NPDCCH，所述第二NPDCCH携带用于指示SC-MTCH调度信息的DCI；以及发送SC-MTCH传输信息，所述SC-MTCH传输信息根据所述 SC-MTCH调度信息调度。
在一个示例性实施例中，SC-MCCH信息变更通知由第一NPDCCH携带的所述DCI指示，以及SC-MCCH信息变更通知的发送与SC-MTCH相关信息的发送发生冲突包括以下任一情况：发送第一NPDCCH的子帧或时刻和发送第二NPDCCH的子帧或时刻发生冲突；发送第一NPDCCH的子帧或时刻和发送SC-MTCH传输信息的子帧或时刻发生冲突。
在一个示例性实施例中，SC-MCCH信息变更通知由第三NPDCCH携带的DCI指示，以及SC-MCCH信息变更通知的发送与SC-MTCH相关信息的发送发生冲突包括以下任一情况：发送第三NPDCCH的子帧或时刻和发送第二NPDCCH的子帧或时刻发生冲突；发送第三NPDCCH的子帧或时刻和发送SC-MTCH传输信息的子帧或时刻发生冲突。
在一个示例性实施例中，所述收发机进一步被配置为：发送第二NPDCCH，所述第二NPDCCH携带的DCI指示对在冲突时刻发送的SC-MTCH传输信息的发送进行调度的SC-MTCH调度信息；或全部或者部分重新发送在冲突时刻发送的SC-MTCH传输信息。
由此，本公开的各个实施例提供了SC-MCCH信道变更通知的监听与SC-MTCH信道的接收发生冲突时的解决方案。基于本方案，终端能够在发生冲突时，及时获取变更信息通知，以及变更后的SC-MCCH；同时在冲突结束后，终端重新接收冲突期间传递的SC-MTCH传输信息，避免信息遗漏。
附图说明
通过下文结合附图的详细描述，本公开的上述和其它特征将会变得更加明显，其中：
图1示出了根据本公开的示例性实施例的在UE处执行的方法的流程图；
图2示出了根据本公开的示例性实施例的UE的示意性结构图；
图3示出了根据本发明的示例性实施例的在基站处执行的方法的流程图；以及
图4示出了根据本发明的示例性实施例的基站的示意性结构图。
具体实施方式
下面结合附图和具体实施方式对本公开进行详细阐述。应当注意，本公开不应局限于下文所述的具体实施方式。另外，为了简便起见，省略了对与本公开没有直接关联的公知技术的详细描述，以防止对本公开的理解造成混淆。
下文以LTE移动通信系统及其后续的演进版本作为示例应用环境，以支持NB-IoT的基站和UE(用户设备)为例，具体描述了根据本公开的多个实施方式。然而，需要指出的是，本公开不限于以下实施方式，而是可适用于更多其它的无线通信系统，例如今后的5G蜂窝通信系统，而且可以适用于其他基站和UE，例如支持eMTC(enhanced Machine-Type Communication，增强型机器类型通信)、MMTC(Massive Machine-Type Communication，海量机器类型通信)等的基站和UE。
在具体描述之前，先对本公开中提到的若干术语做如下说明，其中有些术语已在背景技术中提及。除非另有指出，本公开中涉及的术语都具有下文的含义。
SC-PTM(Single-Cell Point-To-Multipoint)：单小区点对多点
SC-MCCH(Single-Cell Multicast Control Channel)：单小区多播控制信道
SC-MTCH(Single-Cell Multicast Traffic Channel)：单小区多播业务信道
NPDCCH(Narrowband Physical Downlink Control Channel)：窄带物理下行控制信道
DCI(Downlink Control Information)：下行控制信息
MBMS Session Identity(Multimedia Broadcast Multicast Service Session Identity)：多媒体广播多播业务会话标识
此外，在本文中，术语“UE”、“终端”、“终端设备”可互换地使用。
以下将参照图1，对根据本公开的示例性实施例的在UE处执行的用于接收单小区多播业务的方法进行描述。图1示意性地示出了根据本公开的示例性实施例的在UE处执行的方法100的流程图。
如图1所示，在步骤S101，UE接收SC-MCCH相关信息。
具体地，对多播业务感兴趣的UE首先通过在系统消息块SIB20上广播的或通过专有信令通知给UE的内容，获知SC-PTM控制信道SC-MCCH的配置信息，具体包括用于调度SC-MCCH的NPDCCH(这里称为第一NPDCCH)出现的时刻。在NB-IoT系统中，SC-MCCH信道的传输由第一NPDCCH上的DCI来指示。本领域技术人员可以理解，第一NPDCCH可能出现的时频资源也可以是网络侧预定义的。
进而，UE可以在对应时刻去监听第一NPDCCH，具体包括首先接收NPDCCH公共搜索空间，然后搜索是否有SC-MCCH对应的RNTI加扰的第一NPDCCH，如果存在，则对其进行解码，提取第一NPDCCH携带的DCI，以获得由DCI指示的SC-MCCH调度信息。在第一NPDCCH信道上携带的DCI指示SC-MCCH调度信息，包括SC-MCCH传输的时频资源、编码信息，以及可选地，SC-MCCH传输的重复次数等等，UE可以根据该DCI指示的SC-MCCH调度信息来接收SC-MCCH信道，从而获取SC-MCCH信道上传输的信息，也称为SC-MCCH传输信息。因此接收SC-MCCH包括两部分，首先，监听并接收第一NPDCCH，所述第一NPDCCH携带用于指示SC-MCCH调度信息的DCI；其次，根据所述SC-MCCH调度信息来接收SC-MCCH信道上传输的信息，即，SC-MCCH传输信息。
在步骤S103，UE根据接收的SC-MCCH相关信息来接收SC-MTCH相关信息。
SC-MCCH传输信息包含了各类MBMS业务所在的SC-MTCH信道的配置信息，该配置信息用于接收SC-MTCH信道传输信息(简称为接收SC-MTCH信道或接收SC-MTCH)。在NB-IoT系统中，SC-MTCH信道的传输由另一NPDCCH(这里称为第二NPDCCH)上的DCI来调度指示的。第二NPDCCH可能出现的时频资源由SC-MCCH信道上传输的信息(即，SC-MCCH传输信息)提供。UE首先在对应的时频资源上监听是否有调度SC-MTCH的第二NPDCCH，具体包括首先接收NPDCCH公共搜索空间，然后搜索是否有与SC-MTCH相对应的RNTI加扰的NPDCCH，如果存在，则对其进行解码，提取第二NPDCCH携带的DCI信息，以获得SC-MTCH调度信息，包括SC-MTCH传输的时频资源、编码信息，以及可选地，SC-MTCH传输的重复次数等等，UE可以根据该DCI指示的SC-MTCH调度信息来接收SC-MTCH信道，从而获取SC-MTCH信道上传输的信息，也称为SC-MTCH传输信息。因此接收SC-MTCH包括两部分，首先，监听并接收第二NPDCCH，所述第二NPDCCH携带用于指示SC-MTCH调度信息 的DCI；其次，根据所述SC-MTCH调度信息来接收SC-MTCH信道上传输的信息，即，SC-MTCH传输信息。
由于SC-MCCH传输信息在MBMS业务传输的过程中可能发生变更，变更的原因可能是新业务的增加、或者老业务的结束、或者某项业务的SC-MTCH配置发生变化，因而当SC-MCCH传输信息发生或者即将发生变更时，网络侧会向UE发送用于指示SC-MCCH传输信息是否发生变更的SC-MCCH信息变更通知。SC-MCCH信息变更通知携带在NPDCCH中，且仅在预定时刻出现。在NB-IoT系统中，SC-MCCH信息变更通知可以和调度SC-MCCH的NPDCCH出现在不同的时刻，或者是包含在调度SC-MCCH的NPDCCH中，或者是包含在寻呼信道中。因此，接收MBMS业务的UE只需要在相应的时刻去监听是否有携带SC-MCCH信息变更通知的NPDCCH或者寻呼消息即可。
因而方法100还可以包括步骤S105，其中UE监听用于SC-MCCH信息变更通知。
SC-MCCH信息变更通知可能出现的时频资源可以是网络侧预定义的、或在SC-MCCH的配置信息中告知给UE，需要UE在对应时刻去监听并接收该SC-MCCH信息变更通知，以指示SC-MCCH传输信息是否发生变更。
由于传输SC-MTCH的载波与传输SC-MCCH的载波以及指示SC-MCCH变更通知的载波不相同，因此当终端在持续接收SC-MTCH时，对SC-MCCH信息变更通知的监听与接收与对SC-MTCH相关信息的接收之间可能会存在冲突。
因而，UE需要检测SC-MCCH信息变更通知的监听与SC-MTCH相关信息的接收是否会发生冲突。在步骤S107中，当SC-MCCH信息变更通知的监听与SC-MTCH相关信息的接收发生冲突时，UE选择监听SC-MCCH信息变更通知。
在完成当SC-MCCH信息变更通知的监听与SC-MTCH相关信息的接收发生冲突时对SC-MCCH信息变更通知的监听和接收之后，UE可以根据变更后的SC-MCCH传输信息来接收SC-MTCH相关信息。
在一个实施例中，SC-MCCH信息变更通知可以由另一NPDCCH(这里称为第三NPDCCH)中携带的DCI指示，第三NPDCCH可能出现的时刻或资源可以是网络侧预定义的，或者在SC-MCCH配置信息中告知给UE， 需要UE在对应时刻去监听第三NPDCCH，以确认SC-MCCH信息是否发生变更。
当监听第三NPDCCH的子帧或时刻(即，监听SC-MCCH信息变更通知的子帧或时刻)与接收SC-MTCH相关信息的子帧或时刻发生冲突时，在冲突的子帧或时刻，UE可以选择监听第三NPDCCH，即，放弃接收SC-MTCH相关信息，前往监听并接收第三NPDCCH。
如前所述，SC-MTCH相关信息的接收包括两部分：第二NPDCCH的监听和接收和SC-MTCH传输信息的接收，因此，监听第三NPDCCH的子帧或时刻与接收SC-MTCH相关信息的子帧或时刻发生冲突可以包括以下任一情况：监听第三NPDCCH的子帧或时刻和监听第二NPDCCH的子帧或时刻发生冲突；监听第三NPDCCH的子帧或时刻和接收SC-MTCH传输信息的子帧或时刻发生冲突。
如果在UE完成对第三NPDCCH的监听和接收后，获得的SC-MCCH信息变更通知指示SC-MCCH传输信息未变更，则UE可以继续接收SC-MTCH相关信息。具体地，在监听第三NPDCCH的子帧或时刻和接收第二NPDCCH的子帧或时刻发生冲突的情况下，UE可以继续接收第二NPDCCH并接收SC-MTCH传输信息；在监听第三NPDCCH的子帧或时刻和接收SC-MTCH传输信息的子帧或时刻发生冲突的情况下，UE可以继续接收SC-MTCH传输信息。
如果在UE完成对第三NPDCCH的监听和接收后，获得的SC-MCCH信息变更通知指示SC-MCCH传输信息发生了变更，则UE需要进一步获取变更后的SC-MCCH传输信息。
因而，UE根据第一NPDCCH携带的DCI所指示的SC-MCCH调度信息，接收变更后的SC-MCCH传输信息。进而，UE根据接收到的变更后的SC-MCCH传输信息，监听并接收第二NPDCCH；并根据第二NPDCCH携带的DCI所指示的SC-MTCH调度信息，接收SC-MTCH传输信息。
应理解，一旦UE根据接收到SC-MCCH信息变更通知，指示SC-MCCH信息发生变更，则终端需要进一步接收SC-MCCH信息，由于传输SC-MTCH的载波与传输SC-MCCH的载波不相同，因此当终端在持续接收SC-MTCH时，对SC-MCCH相关信息的接收与SC-MTCH相关信息的接收之间可能 会存在冲突。
当接收SC-MCCH相关信息的子帧或时刻与接收SC-MTCH相关信息的子帧或时刻发生冲突时，在冲突的子帧或时刻，UE选择接收SC-MCCH相关信息，即，放弃接收SC-MTCH相关信息，前往接收SC-MCCH相关信息。如前所述，SC-MCCH相关信息的接收包括两部分：第一NPDCCH的监听和接收和SC-MCCH传输信息的接收；而SC-MTCH相关信息的接收也包括两部分：第二NPDCCH的监听和接收和SC-MTCH传输信息的接收。因此，接收SC-MCCH相关信息的子帧或时刻与接收SC-MTCH相关信息的子帧或时刻发生冲突可以是下面四种情况中的任意一种：
监听第一NPDCCH的子帧或时刻和监听第二NPDCCH的子帧或时刻发生冲突；
监听第一NPDCCH的子帧或时刻和接收SC-MTCH传输信息的子帧或时刻发生冲突；
接收SC-MCCH信道的子帧或时刻和监听第二NPDCCH的子帧或时刻发生冲突；
接收SC-MCCH信道的子帧或时刻和接收SC-MTCH传输信息的子帧或时刻发生冲突。
在UE完成对SC-MCCH相关信息的接收后，可以继续接收SC-MTCH相关信息。具体地，在监听第一NPDCCH的子帧或时刻和监听第二NPDCCH的子帧或时刻发生冲突，或接收SC-MCCH传输信息的子帧或时刻和监听第二NPDCCH的子帧或时刻发生冲突的情况下，在UE完成SC-MCCH传输信息的接收后，可以继续监听并接收第二NPDCCH、以及接收SC-MTCH传输信息；在监听第一NPDCCH的子帧或时刻和接收SC-MTCH传输信息的子帧或时刻发生冲突，或接收SC-MCCH传输信息的子帧或时刻和接收SC-MTCH传输信息的子帧或时刻发生冲突的情况下，在UE完成SC-MCCH的接收后，可以继续接收SC-MTCH信道。
在另一实施例中，SC-MCCH信息变更通知可以由第一NPDCCH携带的用于指示SC-MCCH调度信息的DCI来指示，第一NPDCCH可能出现的时刻或资源可以是网络侧预定义的，或者在SC-MCCH的配置信息中告知给UE，需要UE在对应时刻去监听第一NPDCCH，以获得SC-MCCH调度信息以及SC-MCCH信息变更通知。
当监听第一NPDCCH的子帧或时刻与接收SC-MTCH相关信息的子帧或时刻发生冲突时，在冲突的子帧或时刻，UE选择接收第一NPDCCH，即，放弃接收SC-MTCH相关信息，前往监听并接收第一NPDCCH。
SC-MCCH信息变更通知的监听与SC-MTCH相关信息的接收发生冲突可以包括以下任一情况：
监听第一NPDCCH的子帧或时刻和监听第二NPDCCH的子帧或时刻发生冲突；
监听第一NPDCCH的子帧或时刻和接收SC-MTCH传输信息的子帧或时刻发生冲突。
如果在UE完成对第一NPDCCH的监听和接收后，获得的第一NPDCCH携带的DCI指示的SC-MCCH信息变更通知指示SC-MCCH传输信息未发生变更，则UE可以继续接收SC-MTCH相关信息。具体地，在监听第一NPDCCH的子帧或时刻和监听第二NPDCCH的子帧或时刻发生冲突的情况下，UE可以继续监听和接收第二NPDCCH并接收SC-MTCH传输信息；在监听第一NPDCCH的子帧或时刻和监听SC-MTCH传输信息的子帧或时刻发生冲突的情况下，UE可以继续接收SC-MTCH传输信息。
如果在UE完成对第一NPDCCH的监听和接收后，获得的第一NPDCCH携带的DCI指示的SC-MCCH信息变更通知指示SC-MCCH传输信息发生变更，则UE继续根据接收到的第一NPDCCH携带的DCI所指示的SC-MCCH调度信息，接收变更后的SC-MCCH传输信息。进而，UE根据接收到的变更后的SC-MCCH传输信息，监听并接收第二NPDCCH；并根据第二NPDCCH携带的DCI所指示的SC-MTCH调度信息，接收SC-MTCH传输信息。
以下，详细描述根据本发明的若干操作示例。
示例1
终端监听用于调度SC-MTCH的NPDCCH；当终端被配置为从子帧时刻n开始，在另外一个载波上监听用于SC-MCCH信息变更通知的NPDCCH，则从子帧时刻n开始，终端不监听用于调度SC-MTCH的NPDCCH，而是根据配置，监听用于SC-MCCH信息变更通知的NPDCCH。可选地，终端可以从子帧时刻n-k开始，在另外一个载波上监听用于SC-MCCH信息变更通知的NPDCCH，k为终端从一个载波上接收转换到另 外一个载波上接收所需要的转换时间。
可选地，终端可以停止正在运行的SC-PTM不连续接收定时器.
示例2
终端接收携带SC-MTCH信息的NPDSCH信道，该信道的传输占据N个连续的子帧，这些子帧中不包括用于在另外一个载波上传输SC-MCCH信息变更通知的子帧。在这些子帧中，终端按照配置，例如SC-MCCH传输信息中的配置，或者网络侧预定义的配置，监听用于SC-MCCH信息变更通知的NPDCCH。
可选地，终端可以维持正在运行的SC-PTM不连续接收定时器，如果定时器超时，N个子帧中还有x个子帧上的信息还没有收到，则终端放弃已接收的N-x个子帧上的内容。
应理解，尽管以序号标识了方法100中所包括的各个步骤，但是这些序号并不代表对这些步骤的执行顺序进行了限定。方法100中的各个步骤可以按照可实现的方式以任何顺序执行。
以下，将参照附图2，对根据本发明的示例性实施例的UE的示意性结构进行描述。
图2示出了根据本发明的示例性实施例的UE 200的示意性结构图。如图2所示，UE 200包括：收发机201和检测单元203。本领域技术人员应理解，在图2的UE 200中仅示出了与本发明相关的收发机201和检测单元203，以避免混淆本发明。然而，本领域技术人员应理解，尽管未在图2中示出，但是根据本发明实施例的UE还包括构成UE的其他单元。UE 200可以用于执行根据本发明各实施例的用于接收单小区多播业务的方法，例如，如图1所示的方法100。
UE 200可以利用收发机201在步骤S101来接收SC-MCCH相关信息；在步骤S103根据接收的SC-MCCH相关信息来接收SC-MTCH相关信息；以及在步骤S105监听用于指示SC-MCCH传输信息是否发生变更的SC-MCCH信息变更通知。
具体地，在步骤S101中，收发机201监听并接收第一NPDCCH，所述第一NPDCCH中包含用于指示SC-MCCH调度信息的下行控制信息DCI；并根据所述SC-MCCH调度信息，接收SC-MCCH传输信息。
在步骤S103中，收发机201根据所述SC-MCCH传输信息，监听并接 收第二NPDCCH，所述第二NPDCCH中包含用于指示SC-MTCH调度信息的DCI；并根据所述SC-MTCH调度信息，接收SC-MTCH传输信息。
UE 200可以利用检测单元203来检测用于指示SC-MCCH传输信息是否发生变更的SC-MCCH信息变更通知的监听与SC-MTCH相关信息的接收是否发生冲突。当检测单元203检测到SC-MCCH信息变更通知的监听与SC-MTCH相关信息的接收发生冲突时，收发机201在步骤S107选择监听SC-MCCH信息变更通知。
在完成当SC-MCCH信息变更通知的监听与SC-MTCH相关信息的接收发生冲突时对SC-MCCH信息变更通知的监听和接收之后，收发机201根据变更后的SC-MCCH传输信息来接收SC-MTCH相关信息。
如前所述，在一个实施例中，SC-MCCH信息变更通知可以由第三NPDCCH携带的DCI指示。在该实施例中，SC-MCCH信息变更通知的监听与SC-MTCH相关信息的接收发生冲突包括以下任一情况：监听第一NPDCCH的子帧或时刻和监听第二NPDCCH的子帧或时刻发生冲突；监听第一NPDCCH的子帧或时刻和接收SC-MTCH传输信息的子帧或时刻发生冲突。
在另一实施例中，SC-MCCH信息变更通知由第一NPDCCH携带的所述DCI指示。在该实施例中，SC-MCCH信息变更通知的监听与SC-MTCH相关信息的接收发生冲突包括以下任一情况：监听第一NPDCCH的子帧或时刻和监听第二NPDCCH的子帧或时刻发生冲突；监听第一NPDCCH的子帧或时刻和接收SC-MTCH传输信息的子帧或时刻发生冲突。
以下将参照图3，对根据本公开的示例性实施例的在基站处执行的用于发送单小区多播业务的方法进行描述。图3示意性地示出了根据本公开的示例性实施例的在基站处执行的方法300的流程图。
如图3所示，在步骤S301，基站向UE发送SC-MCCH相关信息。具体地，基站发送第一NPDCCH，所述第一NPDCCH携带用于指示SC-MCCH调度信息的下行控制信息DCI；以及发送SC-MCCH传输信息，所述SC-MCCH传输信息根据所述SC-MCCH调度信息调度。
在步骤S303，基站向UE发送SC-MTCH相关信息，所述SC-MTCH相关信息根据所述SC-MCCH相关信息调度。具体地，基站发送第二 NPDCCH，所述第二NPDCCH携带用于指示SC-MTCH调度信息的DCI；以及发送SC-MTCH传输信息，所述SC-MTCH传输信息根据所述SC-MTCH调度信息调度。
在步骤S305，基站确定用于指示SC-MCCH传输信息是否发生变更的SC-MCCH信息变更通知的发送与SC-MTCH相关信息的发送是否发生冲突。
在一个实施例中，SC-MCCH信息变更通知可以由第一NPDCCH携带的所述DCI指示。在该实施例中，SC-MCCH信息变更通知的发送与SC-MTCH相关信息的发送发生冲突包括以下任一情况：发送第一NPDCCH的子帧或时刻和发送第二NPDCCH的子帧或时刻发生冲突；发送第一NPDCCH的子帧或时刻和发送SC-MTCH传输信息的子帧或时刻发生冲突。
在另一实施例中，SC-MCCH信息变更通知由第三NPDCCH携带的DCI指示。在该实施例中，SC-MCCH信息变更通知的发送与SC-MTCH相关信息的发送发生冲突包括以下任一情况：发送第三NPDCCH的子帧或时刻和发送第二NPDCCH的子帧或时刻发生冲突；发送第三NPDCCH的子帧或时刻和发送SC-MTCH传输信息的子帧或时刻发生冲突。
在确定SC-MCCH信息变更通知的发送与SC-MTCH相关信息的发送发生冲突的情况下，在步骤S307中，基站在冲突结束后重新发送冲突时刻发送的SC-MTCH相关信息，具体包括以下之一：发送第二NPDCCH，所述第二NPDCCH携带的DCI指示对在冲突时刻发送的SC-MTCH传输信息的发送进行调度的SC-MTCH调度信息；全部或者部分重新发送在冲突时刻发送的SC-MTCH传输信息。
应理解，尽管以序号标识了方法300中所包括的各个步骤，但是这些序号并不代表对这些步骤的执行顺序进行了限定。方法300中的各个步骤可以按照可实现的方式以任何顺序执行。
以下，将参照附图4，对根据本发明的示例性实施例的基站的示意性结构进行描述。
图4示出了根据本发明的示例性实施例的基站400的示意性结构图。如图4所示，基站400：收发机401和确定单元403。本领域技术人员应理解，在图4的基站400中仅示出了与本发明相关的收发机401和确定单元 403，以避免混淆本发明。然而，本领域技术人员应理解，尽管未在图4中示出，但是根据本发明实施例的基站还包括构成基站的其他单元。基站400可以用于执行根据本发明各实施例的用于发送单小区多播业务的方法，例如，如图3所示的方法300。
基站400可以利用收发机401在步骤S301发送SC-MCCH相关信息；以及在步骤S303发送SC-MTCH相关信息，所述SC-MTCH相关信息根据所述SC-MCCH相关信息调度。
具体地，在步骤S301，收发机401发送第一NPDCCH，所述第一NPDCCH携带用于指示SC-MCCH调度信息的下行控制信息DCI；以及发送SC-MCCH传输信息，所述SC-MCCH传输信息根据所述SC-MCCH调度信息调度。
在步骤S303，收发机401发送第二NPDCCH，所述第二NPDCCH携带用于指示SC-MTCH调度信息的DCI；以及发送SC-MTCH传输信息，所述SC-MTCH传输信息根据所述SC-MTCH调度信息调度。
在一个实施例中，SC-MCCH信息变更通知可以由第一NPDCCH携带的所述DCI指示。在该实施例中，SC-MCCH信息变更通知的发送与SC-MTCH相关信息的发送发生冲突包括以下任一情况：发送第一NPDCCH的子帧或时刻和发送第二NPDCCH的子帧或时刻发生冲突；发送第一NPDCCH的子帧或时刻和发送SC-MTCH传输信息的子帧或时刻发生冲突。
在另一实施例中，SC-MCCH信息变更通知由第三NPDCCH携带的DCI指示。在该实施例中，SC-MCCH信息变更通知的发送与SC-MTCH相关信息的发送发生冲突包括以下任一情况：发送第三NPDCCH的子帧或时刻和发送第二NPDCCH的子帧或时刻发生冲突；发送第三NPDCCH的子帧或时刻和发送SC-MTCH传输信息的子帧或时刻发生冲突。
基站400可以利用确定单元403在步骤S305确定用于指示SC-MCCH传输信息是否发生变更的SC-MCCH信息变更通知的发送与SC-MTCH相关信息的发送是否发生冲突。当确定单元403确定SC-MCCH信息变更通知的发送与SC-MTCH相关信息的发送发生冲突时，基站400利用收发机401在步骤S307中在冲突结束后重新发送冲突时刻发送的SC-MTCH相关信息，具体包括以下之一：发送第二NPDCCH，所述第二NPDCCH携带的 DCI指示对在冲突时刻发送的SC-MTCH传输信息的发送进行调度的SC-MTCH调度信息；全部或者部分重新发送在冲突时刻发送的SC-MTCH传输信息。
运行在根据本发明的设备上的程序可以是通过控制中央处理单元(CPU)来使计算机实现本发明的实施例功能的程序。该程序或由该程序处理的信息可以临时存储在易失性存储器(如随机存取存储器RAM)、硬盘驱动器(HDD)、非易失性存储器(如闪速存储器)、或其他存储器系统中。
用于实现本发明各实施例功能的程序可以记录在计算机可读记录介质上。可以通过使计算机系统读取记录在所述记录介质上的程序并执行这些程序来实现相应的功能。此处的所谓“计算机系统”可以是嵌入在该设备中的计算机系统，可以包括操作系统或硬件(如外围设备)。“计算机可读记录介质”可以是半导体记录介质、光学记录介质、磁性记录介质、短时动态存储程序的记录介质、或计算机可读的任何其他记录介质。
用在上述实施例中的设备的各种特征或功能模块可以通过电路(例如，单片或多片集成电路)来实现或执行。设计用于执行本说明书所描述的功能的电路可以包括通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)、或其他可编程逻辑器件、分立的门或晶体管逻辑、分立的硬件组件、或上述器件的任意组合。通用处理器可以是微处理器，也可以是任何现有的处理器、控制器、微控制器、或状态机。上述电路可以是数字电路，也可以是模拟电路。因半导体技术的进步而出现了替代现有集成电路的新的集成电路技术的情况下，本发明的一个或多个实施例也可以使用这些新的集成电路技术来实现。
此外，本发明并不局限于上述实施例。尽管已经描述了所述实施例的各种示例，但本发明并不局限于此。安装在室内或室外的固定或非移动电子设备可以用作终端设备或通信设备，如AV设备、厨房设备、清洁设备、空调、办公设备、自动贩售机、以及其他家用电器等。
如上，已经参考附图对本发明的实施例进行了详细描述。但是，具体的结构并不局限于上述实施例，本发明也包括不偏离本发明主旨的任何设计改动。另外，可以在权利要求的范围内对本发明进行多种改动，通过适 当地组合不同实施例所公开的技术手段所得到的实施例也包含在本发明的技术范围内。此外，上述实施例中所描述的具有相同效果的组件可以相互替代。

Claims (24)

  1. 一种在用户设备UE处执行的方法，包括：
    接收单小区多播控制信道SC-MCCH相关信息；
    根据接收的SC-MCCH相关信息来接收单小区多播业务信道SC-MTCH相关信息；
    监听用于指示SC-MCCH传输信息是否发生变更的SC-MCCH信息变更通知；以及
    当SC-MCCH信息变更通知的监听与SC-MTCH相关信息的接收发生冲突时，监听SC-MCCH信息变更通知。
  2. 根据权利要求1所述的方法，其中接收SC-MCCH相关信息的步骤包括：
    监听并接收第一窄带物理下行控制信道NPDCCH，所述第一NPDCCH携带用于指示SC-MCCH调度信息的下行控制信息DCI；以及
    根据所述SC-MCCH调度信息，接收SC-MCCH传输信息。
  3. 根据权利要求2所述的方法，其中根据接收的SC-MCCH相关信息来接收SC-MTCH相关信息的步骤包括：
    根据所述SC-MCCH传输信息，监听并接收第二NPDCCH，所述第二NPDCCH携带用于指示SC-MTCH调度信息的DCI；以及
    根据所述SC-MTCH调度信息，接收SC-MTCH传输信息。
  4. 根据权利要求3所述的方法，其中SC-MCCH信息变更通知由第一NPDCCH携带的所述DCI指示，以及
    SC-MCCH信息变更通知的监听与SC-MTCH相关信息的接收发生冲突包括以下任一情况：
    监听第一NPDCCH的子帧或时刻和监听第二NPDCCH的子帧或时刻发生冲突；
    监听第一NPDCCH的子帧或时刻和接收SC-MTCH传输信息的子帧或时刻发生冲突。
  5. 根据权利要求3所述的方法，其中SC-MCCH信息变更通知由第三NPDCCH携带的DCI指示，以及
    SC-MCCH信息变更通知的监听与SC-MTCH相关信息的接收发生冲突包括以下任一情况：
    监听第三NPDCCH的子帧或时刻和监听第二NPDCCH的子帧或时刻发生冲突；
    监听第三NPDCCH的子帧或时刻和接收SC-MTCH传输信息的子帧或时刻发生冲突。
  6. 根据权利要求2-5中任一项所述的方法，还包括：
    在完成当SC-MCCH信息变更通知的监听与SC-MTCH相关信息的接收发生冲突时对SC-MCCH信息变更通知的监听和接收之后，根据变更后的SC-MCCH传输信息来接收SC-MTCH相关信息。
  7. 一种用户设备UE，包括：
    收发机，被配置为：接收单小区多播控制信道SC-MCCH相关信息；根据接收的SC-MCCH相关信息来接收单小区多播业务信道SC-MTCH相关信息；以及监听用于指示SC-MCCH传输信息是否发生变更的SC-MCCH信息变更通知；
    检测单元，被配置为：检测SC-MCCH信息变更通知的监听与SC-MTCH相关信息的接收是否发生冲突；
    其中所述收发机还被配置为：当检测单元检测到SC-MCCH信息变更通知的监听与SC-MTCH相关信息的接收发生冲突时，监听SC-MCCH信息变更通知。
  8. 根据权利要求7所述的UE，其中所述收发机进一步被配置为：
    监听并接收第一窄带物理下行控制信道NPDCCH，所述第一NPDCCH携带用于指示SC-MCCH调度信息的下行控制信息DCI；以及
    根据所述SC-MCCH调度信息，接收SC-MCCH传输信息。
  9. 根据权利要求8所述的UE，其中所述收发机进一步被配置为：
    根据所述SC-MCCH传输信息，监听并接收第二NPDCCH，所述第二NPDCCH携带用于指示SC-MTCH调度信息的DCI；以及
    根据所述SC-MTCH调度信息，接收SC-MTCH传输信息。
  10. 根据权利要求9所述的UE，其中SC-MCCH信息变更通知由第一NPDCCH携带的所述DCI指示，以及
    SC-MCCH信息变更通知的监听与SC-MTCH相关信息的接收发生冲突包括以下任一情况：
    监听第一NPDCCH的子帧或时刻和监听第二NPDCCH的子帧或时刻发生冲突；
    监听第一NPDCCH的子帧或时刻和接收SC-MTCH传输信息的子帧或时刻发生冲突。
  11. 根据权利要求9所述的方法，其中SC-MCCH信息变更通知由第三NPDCCH携带的DCI指示，以及
    SC-MCCH信息变更通知的监听与SC-MTCH相关信息的接收发生冲突包括以下任一情况：
    监听第三NPDCCH的子帧或时刻和监听第二NPDCCH的子帧或时刻发生冲突；
    监听第三NPDCCH的子帧或时刻和接收SC-MTCH传输信息的子帧或时刻发生冲突。
  12. 根据权利要求8-11中任一项所述的UE，其中所述接收机还被配置为：
    在完成当SC-MCCH信息变更通知的监听与SC-MTCH相关信息的接收发生冲突时对SC-MCCH信息变更通知的监听和接收之后，根据变更后的SC-MCCH传输信息来接收SC-MTCH相关信息。
  13. 一种在基站处执行的方法，包括：
    发送单小区多播控制信道SC-MCCH相关信息；
    发送单小区多播业务信道SC-MTCH相关信息，所述SC-MTCH相关信息根据所述SC-MCCH相关信息调度；
    确定用于指示SC-MCCH传输信息是否发生变更的SC-MCCH信息变更通知的发送与SC-MTCH相关信息的发送是否发生冲突；以及
    当确定SC-MCCH信息变更通知的发送与SC-MTCH相关信息的发送发生冲突时，在冲突结束后重新发送冲突时刻发送的SC-MTCH相关信息。
  14. 根据权利要求13所述的方法，其中发送SC-MCCH相关信息的步骤包括：
    发送第一窄带物理下行控制信道NPDCCH，所述第一NPDCCH携带 用于指示SC-MCCH调度信息的下行控制信息DCI；以及
    发送SC-MCCH传输信息，所述SC-MCCH传输信息根据所述SC-MCCH调度信息调度。
  15. 根据权利要求14所述的方法，其中发送SC-MTCH相关信息的步骤包括：
    发送第二NPDCCH，所述第二NPDCCH携带用于指示SC-MTCH调度信息的DCI；以及
    发送SC-MTCH传输信息，所述SC-MTCH传输信息根据所述SC-MTCH调度信息调度。
  16. 根据权利要求15所述的方法，其中SC-MCCH信息变更通知由第一NPDCCH携带的所述DCI指示，以及
    SC-MCCH信息变更通知的发送与SC-MTCH相关信息的发送发生冲突包括以下任一情况：
    发送第一NPDCCH的子帧或时刻和发送第二NPDCCH的子帧或时刻发生冲突；
    发送第一NPDCCH的子帧或时刻和发送SC-MTCH传输信息的子帧或时刻发生冲突。
  17. 根据权利要求15所述的方法，其中SC-MCCH信息变更通知由第三NPDCCH携带的DCI指示，以及
    SC-MCCH信息变更通知的发送与SC-MTCH相关信息的发送发生冲突包括以下任一情况：
    发送第三NPDCCH的子帧或时刻和发送第二NPDCCH的子帧或时刻发生冲突；
    发送第三NPDCCH的子帧或时刻和发送SC-MTCH传输信息的子帧或时刻发生冲突。
  18. 根据权利要求15-17中任一项所述的方法，其中在冲突结束后重新发送冲突时刻发送的SC-MTCH相关信息包括以下之一：
    发送第二NPDCCH，所述第二NPDCCH携带的DCI指示对在冲突时刻发送的SC-MTCH传输信息的发送进行调度的SC-MTCH调度信息；
    全部或者部分重新发送在冲突时刻发送的SC-MTCH传输信息。
  19. 一种基站，包括：
    收发机，被配置为：发送单小区多播控制信道SC-MCCH相关信息；以及发送单小区多播业务信道SC-MTCH相关信息，所述SC-MTCH相关信息根据所述SC-MCCH相关信息调度；以及
    确定单元，被配置为：确定用于指示SC-MCCH传输信息是否发生变更的SC-MCCH信息变更通知的发送与SC-MTCH相关信息的发送是否发生冲突，
    其中所述收发机还被配置为：当确定单元确定SC-MCCH信息变更通知的发送与SC-MTCH相关信息的发送发生冲突时，在冲突结束后重新发送冲突时刻发送的SC-MTCH相关信息。
  20. 根据权利要求19所述的基站，其中所述收发机进一步被配置为：
    发送第一窄带物理下行控制信道NPDCCH，所述第一NPDCCH携带用于指示SC-MCCH调度信息的下行控制信息DCI；以及
    发送SC-MCCH传输信息，所述SC-MCCH传输信息根据所述SC-MCCH调度信息调度
  21. 根据权利要求20所述的基站，其中所述收发机进一步被配置为：
    发送第二NPDCCH，所述第二NPDCCH携带用于指示SC-MTCH调度信息的DCI；以及
    发送SC-MTCH传输信息，所述SC-MTCH传输信息根据所述SC-MTCH调度信息调度。
  22. 根据权利要求21所述的基站，其中SC-MCCH信息变更通知由第一NPDCCH携带的所述DCI指示，以及
    SC-MCCH信息变更通知的发送与SC-MTCH相关信息的发送发生冲突包括以下任一情况：
    发送第一NPDCCH的子帧或时刻和发送第二NPDCCH的子帧或时刻发生冲突；
    发送第一NPDCCH的子帧或时刻和发送SC-MTCH传输信息的子帧或时刻发生冲突。
  23. 根据权利要求21所述的基站，其中SC-MCCH信息变更通知由第三NPDCCH携带的DCI指示，以及
    SC-MCCH信息变更通知的发送与SC-MTCH相关信息的发送发生冲突包括以下任一情况：
    发送第三NPDCCH的子帧或时刻和发送第二NPDCCH的子帧或时刻发生冲突；
    发送第三NPDCCH的子帧或时刻和发送SC-MTCH传输信息的子帧或时刻发生冲突。
  24. 根据权利要求21-23中任一项所述的基站，其中所述收发机进一步被配置为：
    发送第二NPDCCH，所述第二NPDCCH携带的DCI指示对在冲突时刻发送的SC-MTCH传输信息的发送进行调度的SC-MTCH调度信息；或
    全部或者部分重新发送在冲突时刻发送的SC-MTCH传输信息。
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