WO2011011946A1 - 一种多媒体广播和组播业务通知消息的发送方法和装置 - Google Patents

一种多媒体广播和组播业务通知消息的发送方法和装置 Download PDF

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Publication number
WO2011011946A1
WO2011011946A1 PCT/CN2009/075509 CN2009075509W WO2011011946A1 WO 2011011946 A1 WO2011011946 A1 WO 2011011946A1 CN 2009075509 W CN2009075509 W CN 2009075509W WO 2011011946 A1 WO2011011946 A1 WO 2011011946A1
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Prior art keywords
notification message
mbms notification
mbms
subframe
rnti
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PCT/CN2009/075509
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English (en)
French (fr)
Inventor
苟伟
马子江
Original Assignee
中兴通讯股份有限公司
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Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to US13/258,098 priority Critical patent/US9432970B2/en
Priority to EP09847732.6A priority patent/EP2461533B1/en
Publication of WO2011011946A1 publication Critical patent/WO2011011946A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/30Resource management for broadcast services
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60Network streaming of media packets
    • H04L65/61Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
    • H04L65/611Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio for multicast or broadcast
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to a Long Term Evolution (LTE) system, and particularly relates to a transmission subframe of a Multimedia Broadcast Multicast Service (MBMS) notification message (MBMS Notification information) and a temporary identifier of a wireless network.
  • MBMS Multimedia Broadcast Multicast Service
  • RNTI Radio Network Temporary Identity
  • the 3rd Generation Partnership Project (3GPP) proposed the MBMS service, which is a technology that transmits data from one data source to multiple targets, and implements the network.
  • the sharing of resources including the core network and the access network
  • improves the utilization of network resources especially air interface resources.
  • MBMS defined by 3GPP can not only realize plain text low-rate message class multicast and broadcast, but also realize high-speed multimedia service broadcast and multicast, providing a variety of rich video, audio and multimedia services, which undoubtedly conforms to future mobile
  • the trend of data development provides a better business prospect for the development of 3G.
  • the MBMS service is characterized by a large amount of data in the service, a long duration of reception by the terminal, and a constant average data rate.
  • the above characteristics determine that the scheduling and control signaling configuration of the MBMS service is semi-static, that is, the scheduling information and control signaling information of the MBMS service are kept "long-term", so that each multicast control channel (Multicast Control) Channel, abbreviated as MCCH)
  • MCCH multicast Control channel
  • the periodic system side of the message sends a message that has no change (always sent because new users may be accessing at any time). So for a terminal that has received MCCH information, there is no need to go every time.
  • an MCCH information update indication information is added (also known as an MBMS notification message, and the MBMS notification message is taken as an example), and a small amount of information is used to describe whether the MCCH information has changed.
  • the already accessed terminal only needs to monitor a small amount. The information is determined according to the MBMS notification message terminal to determine whether to receive the MCCH information.
  • the MBMS service can be transmitted in a hybrid carrier mode.
  • the hybrid carrier mode means that the unicast service (Unicast) and the multicast service (MBMS service) are time-multiplexed on the same carrier.
  • the smallest unit of time division multiplexing is a subframe.
  • LTE specifies that a two-level method is used to configure radio frames and subframes that carry MBMS services.
  • Frequency Division Multiplexing is used to transmit information of a Unicast service. It is also called a Physical Downlink Control Channel (PDCCH). The remaining resources in the subframe are used to transmit MBMS. Business or other business.
  • a unicast sub-frame is mainly used for transmitting unicast service data
  • an MBSFN sub-frame mainly It is used to carry the MBMS service, and can also be used to carry the data sent by the base station to the relay. Therefore, it is more reasonable to select the PDCCH of those subframes.
  • the technical problem to be solved by the present invention is to provide a method and apparatus for transmitting a multimedia broadcast and multicast service notification message to cooperate with the transmission of MBMS notification information.
  • the public search area carried in the PDCCH is preferentially considered, and the current public search area resource of the PDCCH is limited, and at most three RNTIs are carried simultaneously (
  • SI-RNTI System Information RNTI
  • RA-RNTI Random Access RNTI
  • P-RNTI Paging RNTI
  • the M-RNTI In order to ensure that the terminal can quickly resolve the power-saving reception to the information corresponding to the M-RNTI, the M-RNTI needs to be placed in the PDCCH common search area. Therefore, since the resources of the common search area are limited, the information corresponding to the M-RNTI corresponding identifier and the information corresponding to the other three RNTIs must be simultaneously generated in the common search area of the PDCCH of one subframe, and once it occurs, the 4 is affected. The transmission of information corresponding to the RNTI.
  • the present invention provides a method for transmitting a multimedia broadcast and multicast service (MBMS) notification message, which includes:
  • Transmitting the MBMS notification message by selecting a free subframe or a physical downlink control channel (PDCCH) in a subframe having the least impact on scheduling of other services from a time window starting from the time when the MBMS notification message is sent; or
  • PDCCH physical downlink control channel
  • the MBMS notification message is transmitted using a PDCCH in a Multicast Broadcast Single Frequency Network (MBSFN) subframe.
  • MBSFN Multicast Broadcast Single Frequency Network
  • the foregoing sending method further has the following feature: the MBMS notification message is carried in a public search area of the PDCCH in the idle subframe or a subframe that has the least impact on scheduling of other services, or
  • the MBMS notification message is carried in a public retrieval area of a PDCCH in a part or all of the MBSFN subframes carrying the MBMS service.
  • the foregoing sending method further has the following features:
  • the subframe in which the idle subframe or the scheduling of other services has the smallest impact is a subframe other than the subframe carrying the paging message in the MBSFN subframe or the non-MBSFN subframe.
  • the foregoing sending method further has the following features:
  • RNTI agreed radio network temporary identifier
  • the foregoing sending method further has the following features:
  • the agreed RNTI is a good cell wireless network Pro specified by the Long Term Evolution System R9 protocol.
  • the agreed RNTI is one of a multiplexed system message radio network temporary identity (SI-RNTI), a random access radio network temporary identity (RA-RNTI), or a paging message radio network temporary identity (P-RNTI).
  • SI-RNTI system message radio network temporary identity
  • RA-RNTI random access radio network temporary identity
  • P-RNTI paging message radio network temporary identity
  • the foregoing sending method further has the following features:
  • the MBMS service includes: MBMS service data, MBMS control information.
  • the foregoing sending method further has the following features:
  • the part or all of the MBSFN subframes carrying the MBMS service are MBSFN subframes carrying multicast control channel information (MCCH), and the transmission period of the MBMS notification message is set to an integral multiple of the repetition period of the MCCH information.
  • MCCH multicast control channel information
  • the foregoing sending method further has the following features:
  • the MBMS notification message is sent in an MBSFN subframe that transmits MCCH information in a repetition period of part or all of the MCCH information, and the MBMS notification is sent multiple times in a modification period of one MCCH information.
  • the message does not change.
  • the foregoing sending method further has the following features:
  • the step of selecting the idle subframe or the PDCCH in the subframe having the least impact on the scheduling of other services to send the MBMS notification message in a period of time from the time when the MBMS notification message is sent includes:
  • the sender configures the length of the time window and notifies the receiving end of the configuration information
  • the sender and the receiver agree on a fixed time window length, and the agreed fixed time window length is 10 ms or 1 radio frame.
  • the present invention further provides a device for transmitting a multimedia broadcast and multicast service (MBMS) notification message, which includes an MBMS notification message generation module and an MBMS notification message transmission module, where:
  • MBMS multimedia broadcast and multicast service
  • the MBMS notification message generating module is configured to construct the MBMS notification message; the MBMS notification message sending module is configured to be sent from the MBMS notification message.
  • the MBMS notification message generated by the MBMS notification message generating module is sent by selecting a free subframe or a physical downlink channel (PDCCH) in a subframe that has the least impact on scheduling of other services; or
  • the MBMS notification message constructed by the MBMS notification message generating module is sent on the PDCCH in the broadcast single frequency network (MBSFN) subframe.
  • MCSFN broadcast single frequency network
  • the foregoing sending apparatus further has the following feature: the MBMS notification message is carried in a public search area of the PDCCH in the idle subframe or a subframe that has the least impact on scheduling of other services, or
  • the MBMS notification message is carried in a common retrieval area of the PDCCH in part or all of the MBSFN subframes carrying the MBMS service.
  • the above transmitting device further has the following features:
  • the MBMS notification message generating module is further configured to: when the MBMS notification message is constructed, add a cyclic redundancy check bit to the MBMS notification message, and use the agreed radio network temporary identifier (RNTI) for identifying the MBMS notification message.
  • RNTI agreed radio network temporary identifier
  • the cyclic redundancy check bits are scrambled.
  • the above transmitting device further has the following features:
  • the MBMS notification message sending module is further configured to use an MBSFN subframe carrying the multicast control channel information (MCCH) as the MBSFN subframe carrying the MBMS service, and set the sending period of the MBMS notification message to MCCH information.
  • MCCH multicast control channel information
  • the foregoing method and apparatus evade the information corresponding to the four RNTIs in the PDCCH common search area of the subframe carrying the MBMS notification message, and facilitate the terminal to quickly retrieve and save power.
  • the MBMS notification message may be identified by using one of the SI-RNTI, the RA-RNTI, and the P-RNTI as the M-RNTI to identify the MBMS notification message in the PDCCH common search area in the MBSFN subframe. Sending, so that the PDCCH common search area of the subframe does not bear the problem, and the system can save one RNTI.
  • FIG. 1 is a schematic diagram of a PDCCH occupying 2 OFDM symbols in an MBSFN subframe according to an embodiment of the present invention
  • FIG. 3 is a flow chart of generating an MBMS notification message according to an embodiment of the present invention.
  • an MBMS notification message is transmitted using a PDCCH of a Multicast Broadcast Single Frequency Network (MBSFN) subframe carrying an MBMS service.
  • MMSFN Multicast Broadcast Single Frequency Network
  • the MBSFN subframe middle molecular frame is used to carry non-MSMS services (such as positioning service data).
  • the present invention proposes to use the MBSFN subframe to carry the MBMS notification message, but in order to not affect the transmission of other services on the MBSFN subframe, the MBMS notification message is further carried in the MBSFN subframe that carries the MBMS service.
  • the MBMS service includes MBMS service data and MBMS control data information.
  • the MBMS service data includes at least an MBMS Traffic Channel (MTCH, MBMS Traffic Channel), and the MBMS control data information includes at least a Multicast Control Channel (MCCH).
  • MTCH MBMS Traffic Channel
  • MCCH Multicast Control Channel
  • the MBMS notification message may be carried in the public search area of the PDCCH, so that the terminal that needs to be retrieved can quickly retrieve the corresponding information, which is beneficial to the terminal to save power.
  • it can also be carried in the non-public search area of the PDCCH.
  • the retrieval time of the MBMS notification message by the terminal may be slightly longer.
  • the MBMS notification message is carried in the MBSFN subframe, and the MBMS notification message is further transmitted through the PDCCH by using the M-RNTI, where the M-RNTI is an agreement that the non-RNTI is the SI-RNTI or the P-RNTI or the RA-RNTI.
  • RNTI can be carried in the first one or two OFDM of the MBSFN subframe, as shown in Figure 1 and Figure 2.
  • the MBMS notification message carried in the PDCCH may be implemented by using an agreed RNTI, where the agreed RNTI is specified by the LTE R9 protocol, and the terminal is not required to be additionally notified.
  • the specific method is as shown in FIG. 3, which may be: adding a Cyclic Redundancy Check (CRC) bit in the MBMS notification message, and then scrambling the CRC by using the agreed RNTI.
  • CRC Cyclic Redundancy Check
  • XOR can be used (refer to the method in Section 5.3.3.2 of 36.212-870 for details).
  • the agreed RNTI is implicit in the MBMS notification message added to the CRC check bit.
  • the obtained data is modulated and channel-encoded, and then the data to be transmitted is obtained through necessary processing agreed by a protocol such as interleaving.
  • the data to be transmitted is carried in the common search area of the PDCCH of the selected MBSFN subframe, so that the terminal can quickly retrieve the MBMS notification message including the M-RNTI. Specifically, it is directly sent on the MBSFN subframe at the time when the MBMS notification message is sent.
  • the RNTI of the CRC check bit is implicitly included in the MBMS notification message that is added to the CRC check bit in the public search area of the PDCCH, the RNTI is represented as M- in the text. RNTI. After the terminal completes decoding of a certain signaling in the public search area, the CRC check bit is descrambled by the M-RNTI, and then the descrambled CRC check bit is used to verify the signaling, such as checksum. By passing, it can be determined that the signaling is an MBMS notification message.
  • the MBMS notification message should have high reliability, and the public search area is large enough, it is recommended to use a modulation coding method corresponding to 8 control channel elements (CCEs) (Modulation and Coding). Scheme, MCS) is sent.
  • CCEs Control channel elements
  • MCS Modulation and Coding
  • the information including the SI-RNTI, the RA-RNTI, and the P-RNTI is simultaneously carried in the common search region of the PDCCH of the subframe, and the specific inclusion manner and the foregoing manner including the M-RNTI (ie, as the interference)
  • the code scrambling CRC check bits are the same. Since the SI-RNTI, the RA-RNTI, and the P-RNTI may appear in one subframe at the same time, adding an MBMS notification message of the agreed M-RNTI may cause the bearer of the PDCCH in the public search area of the subframe to be unsupported. , or fail to meet the MCS requirements of the bearer, so it is necessary to prevent the four RNTI corresponding information from appearing in the common search area of the PDCCH of the subframe at the same time;
  • the information corresponding to the SI-RNTI and the P-RNTI does not appear in the MBSFN subframe.
  • the MBMS notification message is carried in the MBSFN subframe, thereby preventing the four RNTIs from being simultaneously in one.
  • the PDCCH common search area of the subframe appears.
  • the sending of the MBMS notification message is implemented, and the MBMS notification message is sent in the PDCCH common search area of the subframe, which is convenient for the terminal to quickly retrieve and save power.
  • the terminal receives and retrieves the public retrieval area of the PDCCH. The impact on the LTE R9 protocol is small.
  • This embodiment carries the MBMS notification message in the MBSFN subframe for transmitting the MBMS service. Further implementing the MBMS notification message in the PDCCH common search area of the selected subframe by multiplexing the other three RNTIs that have been determined to be placed in the common search area, that is, the RNTI is the SI-RNTI or the P-RNTI or the RA-RNTI. transmission.
  • the RNTI is the SI-RNTI or the P-RNTI or the RA-RNTI. transmission.
  • the specific use of one or more of the SI-RNTI, the P-RNTI, and the RA-RNTI requires a protocol to specify the protocol, and the signaling terminal is no longer needed at this time.
  • the RNTI resource can be saved by using the SI-RNTI, P-RNTI, or RA-RNTI that are not used in the MBSFN subframe as the M-RNTI.
  • the appropriate MBSFN subframe of the MBMS service carries the MBMS notification message, specifically, is transmitted in the PDCCH in the MBSFN subframe. Since the transmission of the MBMS notification message is regular, for example, periodic transmission, if the MBMS notification message transmission period and the start time are known, the transmission time of each MBMS notification message can be inferred, so that an appropriate MBSFN child can be found. frame.
  • the MBMS notification message is added to the CRC check bit, and then the SI-RNTI or the method of Section 5.3.3.2 is used, and then the obtained information is channel-coded, and then the necessary processing is performed to obtain the data to be transmitted.
  • the data to be sent is sent, the data to be transmitted is carried in a common search area of the PDCCH of the selected MBSFN subframe, so that the terminal can quickly retrieve the MBMS notification message including the SI-RNTI or the P-RNTI or the RA-RNTI.
  • information including the SI-RNTL RA-RNTI and the P-RNTI is simultaneously carried in a common search area of the PDCCH of the subframe.
  • the MBMS notification message is transmitted in the PDCCH common search area in the MBSFN subframe by using one of the SI-RNTI, the RA-RNTI, and the P-RNTI as the M-RNTI to implement the transmission of the MBMS notification message.
  • the PDCCH common search area of the subframe is not carried, and the RNTI can be saved for the system. Search, save electricity.
  • the MBMS notification message sending time window is introduced, and the MBMS notification message is sent by selecting a suitable subframe to use the time window mechanism, which can facilitate the sending end scheduling.
  • the sender can select The idle subframe or the subframe with the least impact on the scheduling of other services carries the MBMS notification message, which can facilitate the scheduling of the sender.
  • the time window may be counted in units of milliseconds, or may be a number of radio frames, for example, a radio frame in which a predetermined time window length is 1 radio frame, that is, an MBMS notification message is transmitted, and an appropriate subframe is selected from the radio frame.
  • the mechanism is not introduced, when the MBMS notification message is sent, the sender is busy scheduling other services, and the service is busy. If there is no time to schedule the MBMS notification message, the MBMS notification message will be sent, or the MBMS notification message will be delayed. The MBMS notification message has delayed the scheduling of other services. Once the mechanism for transmitting the time window is introduced, the transmitting end can schedule the MBMS notification message in the next subframe. This enhances the robustness of the system and makes scheduling more flexible.
  • the receiving end retrieves whether the RNTI has an agreed RNTI on the PDCCH one by one in a time window of the arrival of the notification message period, until the agreed RNTI is retrieved, and the MBMS notification message is obtained.
  • the subframes that have the least impact on the idle subframe or the scheduling of other services are MBSFN subframes or other subframes other than the paging subframes in the non-MBSFN subframe.
  • the sender preferentially selects the MBSFN subframe to carry the MBMS notification message in the time window.
  • other sub-frames are also possible.
  • the sending time window can be fixed in an agreed manner, or can be configured by the sending end, and configured to notify the receiving end of the time window length.
  • the above example is a contracted way.
  • the agreed time window length is prioritized, for example, the agreed time window length is 10ms or a radio frame.
  • the MBMS notification message is carried in the MBSFN subframe for transmitting the MCCH information, that is, the MBMS notification message is carried in the PDCCH of the subframe in which some or all of the MCCH information is located.
  • the MCCH information Since the MCCH information is sent in cycles, its period and the transmission of the MBMS notification message The period may be inconsistent. In this case, you can set the period of the two to be an integer multiple, and the sending period of the MBMS notification message is greater than or equal to the period of the MCCH information. This ensures that at least the sending period of each MBMS notification message is included.
  • the MCCH modification period is an integer multiple of the MCCH repetition period, so one modification period includes one or several MCCH information.
  • the cycle is repeated, and the MCCH information transmitted for each repetition period within one modification period is specified to be the same.
  • the MBMS notification message is carried in the MBSFN subframe in which the MCCH information is transmitted at the repetition period of part or all of the MCCH information, and the modification period of one MCCH information is also observed, the MBMS notification message transmitted multiple times is not allowed to be changed.
  • the foregoing bearer is carried in the PDCCH, and specifically, the MBMS notification message is preferentially carried in the public search area of the PDCCH to facilitate the terminal to quickly retrieve.
  • One of the operations is provided, but is not limited to this operation, the MBMS notification message content is added with a CRC check bit, and then the resulting CRC check bit is scrambled using an agreed RNTI (refer to embodiments 1, 2 herein). Then, according to the protocol, the channel coding and the like are performed for subsequent processing, and then mapped to the PDCCH common search area for transmission.
  • the embodiment is a transmitting device that implements the foregoing sending method, and includes an MBMS notification message generating module and an MBMS notification message sending module, where:
  • An MBMS notification message generating module configured to construct an MBMS notification message
  • the MBMS notification message sending module is configured to: send an MBMS notification message by selecting an idle subframe or a PDCCH in a subframe having the least impact on scheduling of other services from a time window starting from an MBMS notification message sending time; or
  • the PDCCH of part or all of the MBSFN subframes sends an MBMS notification message constructed by the MBMS notification message generating module.
  • the MBMS notification message is carried in a common search area in the physical downlink control channel.
  • the MBMS notification message generating module constructs the MBMS notification message
  • the cyclic redundancy check bit is added to the MBMS notification message, and the agreed wireless for identifying the MBMS notification message is used.
  • the Network Temporary Identity acts as a scrambling code to scramble the cyclic redundancy check bits.
  • the MBMS notification message sending module sends the MBSFN subframe carrying the MCCH as the MBSFN subframe carrying the MBMS notification message, and sets the transmission period of the MBMS notification message to the MCCH. An integer multiple of the repetition period of the information.
  • the method and the device of the present invention do not cause the problem that the PDCCH common search area of the subframe cannot be carried, and can also save an RNTI for the system.

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Description

一种多媒体广播和组播业务通知消息的发送方法和装置 技术领域
本发明涉及长期演进(Long Term Evolution, 简称为 LTE )系统, 特别涉 及多媒体广播和组播业务(Multimedia Broadcast Multicast Service, 简称为 MBMS )通知消息 (MBMS Notification information ) 的发送子帧以及无线网 络临时标识( Radio Network Temporary Identity, 简称为 RNTI )的发送方法和 装置。
背景技术
随着 Internet的迅猛发展和大屏幕多功能手机的普及,出现了大量移动数 据多媒体业务和各种高带宽多媒体业务, 例如, 视频会议、 电视广播、 视频 点播、 广告、 网上教育和互动游戏等, 这一方面满足了移动用户不断上升的 业务需求, 同时也为移动运营商带来新的业务增长点。 这些移动数据多媒体 业务要求多个用户能够同时接收相同数据, 与一般的数据业务相比, 具有数 据量大、 持续时间长以及时延敏感等特点。
为了有效地利用移动网络资源, 第三代合作伙伴计划(3rd Generation Partnership Project, 简称为 3GPP )提出了 MBMS业务, 该业务是一种从一个 数据源向多个目标传送数据的技术, 实现了网络(包括核心网和接入网 ) 资 源的共享, 提高了网络资源(尤其是空中接口资源)的利用率。 3GPP定义的 MBMS不仅能够实现纯文本低速率的消息类组播和广播, 而且还能够实现高 速多媒体业务的广播和组播, 提供多种丰富的视频、 音频和多媒体业务, 这 无疑顺应了未来移动数据发展的趋势, 为 3G的发展提供了更好的业务前景。
MBMS业务的特点是业务的数据量大, 终端接收时持续时间长, 平均数 据率恒定。 上述特点决定了 MBMS 业务的调度与控制信令配置都是半静态 的, 即 MBMS业务的调度信息与控制信令信息都是 "长期"保持不变的, 这 样每个多播控制信道(Multicast Control Channel, 简称为 MCCH )信息的周 期系统侧发送一个没有变化的信息 (始终发送是因为随时都可能有新用户接 入)。 这样对于一个已经接收了 MCCH信息的终端来说, 没有必要每次都去 接收一个没有发生变化的 MCCH信息, 这样会造成终端费电, 因为 MCCH 信息量大, 接收和解析过程比较耗电。 于是提出了增加一个 MCCH信息更新 指示信息(也有公司称为 MBMS通知消息, 本文以 MBMS通知消息为例 ) , 用少量的信息来描述 MCCH信息是否发生了变化, 已经接入的终端只需要监 听少量的信息, 根据 MBMS通知消息终端再去决定是否接收 MCCH信息。
在长期演进(Long Term Evolution, LTE )中, MBMS业务可以釆用混合 载波方式发送, 混合载波方式是指单播业务(Unicast )和多播业务(MBMS 业务) 以时分复用的方式在同一载波上发送, 时分复用的最小单位为子帧。 目前 LTE中规定, 使用两级制方法来配置承载 MBMS业务的无线帧和子帧。
目前在 LTE中 MBSFN子帧的前 1个或者 2个正交频分复用( Orthogonal
Frequency Division Multiplexing, 简称为 OFDM )符号用于传输单播 ( Unicast ) 业务的信息, 也称为物理下行控制信道( Physical Downlink Control Channel, 简称为 PDCCH ) , 该子帧内剩余的资源用来发送 MBMS业务或者其他业务。
虽然目前已经确定引入 MBMS通知消息并使用 PDCCH以及确定使用 RNTI, 但是还没有确定具体在 PDCCH中的什么位置以及使用什么 RNTI。 另外, 由于目前 LTE中有多种不同用途的子帧, 例如有单播子帧主要用于传 输单播业务数据, 进一步还有主要用于发送寻呼消息的子帧, 也有 MBSFN 子帧, 主要用于承载 MBMS业务, 也可以用于承载基站给 relay发送的数据, 那么选择那些子帧的 PDCCH更加得合理。
发明内容
本发明所要解决的技术问题在于, 提供一种多媒体广播和组播业务通知 消息的发送方法和装置, 以配合 MBMS通知信息的发送。
基于引入 MBMS通知消息并使用 PDCCH以及确定使用 RNTI, 为了便 于终端快速检索到 MBMS通知消息, 优先考虑承载在 PDCCH的公共检索区 域, 而目前 PDCCH的公共检索区域资源有限, 最多同时承载 3个 RNTI (分 别是系统消息 RNTI ( System Information RNTI, SI-RNTI ) 、 随机接入 RNTI ( Random Access RNTI , RA-RNTI )和寻呼 RNTI ( Paging RNTI, P-RNTI ) ) 对应标识的信息。目前 MBMS通知消息也需要在 PDCCH中通过一个 M-RNTI 来标识 MBMS通知信息来实现。为了保证终端能够快速的省电的接收解析到 M-RNTI对应的信息 ,需要把 M-RNTI放置在 PDCCH公共检索区域。这样由 于公共检索区域资源有限, 所以必须解决承载 M-RNTI对应标识的信息与其 他 3个 RNTI对应的信息同时在一个子帧的 PDCCH的公共检索区域内出现, 一旦出现则会影响到所述 4个 RNTI对应的信息的发送。
为了解决上述问题, 本发明提供了一种多媒体广播和组播业务 ( MBMS ) 通知消息的发送方法, 其包括:
从所述 MBMS 通知消息发送时刻开始的一段时间窗内选择空闲的子帧 或对其他业务的调度影响最小的子帧中的物理下行控制信道(PDCCH )发送 所述 MBMS通知消息; 或者,
使用多播广播单频网络(MBSFN )子帧中的 PDCCH发送所述 MBMS 通知消息。
进一步地, 上述发送方法还具有以下特点: 所述 MBMS 通知消息承载在所述空闲的子帧或对其他业务的调度影响 最小的子帧中的 PDCCH的公共检索区域内, 或者
所述 MBMS通知消息承载在承载 MBMS业务的部分或全部 MBSFN子 帧中的 PDCCH的公共检索区域内。
进一步地, 上述发送方法还具有以下特点:
所述空闲的子帧或对其他业务的调度影响最小的子帧为 MBSFN子帧或 非 MBSFN子帧中除承载寻呼消息的子帧外的其他子帧。
进一步地, 上述发送方法还具有以下特点:
发送 MBMS通知消息之前 , 还包括:
在所述 MBMS 通知消息中加入循环冗余校验比特, 并将用于标识所述 MBMS通知消息的约定的无线网络临时标识( RNTI )作为扰码, 对所述循环 冗余校验比特进行加扰。
进一步地, 上述发送方法还具有以下特点:
所述约定的 RNTI是通过长期演进系统 R9协议规定好的小区无线网络临 时标识的中的一个; 或者,
所述约定的 RNTI为复用的系统消息无线网络临时标识(SI-RNTI ) 、 随 机接入无线网络临时标识 ( RA-RNTI ) 或寻呼消息无线网络临时标识 ( P-RNTI ) 中的一个。
进一步地, 上述发送方法还具有以下特点:
所述 MBMS业务包括: MBMS业务数据、 MBMS控制信息。
进一步地, 上述发送方法还具有以下特点:
所述承载 MBMS业务的部分或全部 MBSFN子帧为承载有多播控制信道 信息 (MCCH ) 的 MBSFN子帧, 所述 MBMS通知消息的发送周期设置为 MCCH信息的重复周期的整数倍。
进一步地, 上述发送方法还具有以下特点:
通知消息的步骤中, 所述 MBMS通知消息是承载于在部分或全部 MCCH信 息的重复周期中发送 MCCH信息的 MBSFN子帧内进行发送的,一个 MCCH 信息的修改周期内, 多次发送的 MBMS通知消息不改变。
进一步地, 上述发送方法还具有以下特点:
在从所述 MBMS 通知消息发送时刻开始的一段时间窗内选择空闲的子 帧或对其他业务的调度影响最小的子帧中的 PDCCH发送所述 MBMS通知消 息的步骤之前还包括:
发送端配置时间窗的长度, 并把配置信息通知给接收端; 或者
发送端和接收端约定固定的时间窗长度, 所约定的固定的时间窗长度为 10ms或 1个无线帧。
为了解决上述问题, 本发明还提供了一种多媒体广播和组播业务 ( MBMS )通知消息的发送装置,其,包括 MBMS通知消息生成模块和 MBMS 通知消息发送模块, 其中:
所述 MBMS通知消息生成模块, 设置成构建所述 MBMS通知消息; 所述 MBMS通知消息发送模块, 设置成从所述 MBMS通知消息发送时 刻开始的一段时间窗内选择空闲的子帧或对其他业务的调度影响最小的子帧 中的物理下行信道(PDCCH )发送所述 MBMS通知消息生成模块构建好的 MBMS通知消息; 或者, 在多播广播单频网络 (MBSFN)子帧中的 PDCCH上 发送所述 MBMS通知消息生成模块构建好的 MBMS通知消息。
进一步地, 上述发送装置还具有以下特点: 所述 MBMS 通知消息承载在所述空闲的子帧或对其他业务的调度影响 最小的子帧中的 PDCCH的公共检索区域内, 或者
所述 MBMS通知消息承载在所述承载 MBMS业务的部分或全部 MBSFN 子帧中的 PDCCH的公共检索区域内。
进一步地, 上述发送装置还具有以下特点:
所述 MBMS通知消息生成模块还设置成构建 MBMS通知消息时, 在所 述 MBMS通知消息中加入循环冗余校验比特, 并将用于标识所述 MBMS通 知消息的约定的无线网络临时标识(RNTI )作为扰码, 对所述循环冗余校验 比特进行加扰。
进一步地, 上述发送装置还具有以下特点:
所述 MBMS 通知消息发送模块还设置成将承载有多播控制信道信息 ( MCCH ) 的 MBSFN子帧作为所述承载 MBMS业务的 MBSFN子帧, 并将 所述 MBMS通知消息的发送周期设置为 MCCH信息的重复周期的整数倍。
上述方法和装置, 规避开在承载 MBMS通知消息的子帧的 PDCCH公共 检索区域中同时出现 4个 RNTI对应的信息, 且便于终端快速检索, 节电。 在一实施例中, 还可以利用 SI-RNTI、 RA-RNTI以及 P-RNTI中的一个作为 M-RNTI来在 MBSFN子帧中的 PDCCH公共检索区域中标识 MBMS通知消 息, 来实现 MBMS通知消息的发送, 这样更不会造成子帧的 PDCCH公共检 索区域承载不下的问题, 也可以为系统节约一个 RNTI。
附图概述
图 1是本发明实施例 MBSFN子帧中 PDCCH占用 2个 OFDM符号的示 意图;
图 2是本发明实施例 MBSFN子帧中 PDCCH占用 1个 OFDM符号的示 意图;
图 3是本发明实施例产生 MBMS通知消息的流程图。
本发明的较佳实施方式
下面描述 LTE R9中如何实现 MBMS通知消息的发送。
在本发明使用承载 MBMS业务的多播广播单频网络( Multicast Broadcast Single Frequency Network, MBSFN )子帧的 PDCCH发送 MBMS通知消息。
MBSFN子帧中部分子帧用于承载非 MSMS业务(例如定位业务数据 )。 本发明建议使用 MBSFN子帧承载 MBMS通知消息, 但是为了不影响其它业 务在 MBSFN子帧上的发送, 优选的, 进一步本发明中把 MBMS通知消息承 载于承载 MBMS业务的 MBSFN子帧中, 其中, MBMS业务包括 MBMS业 务数据和 MBMS控制数据信息。 MBMS业务数据至少包括 MBMS业务传输 信道( MTCH, MBMS Traffic Channel ) , MBMS控制数据信息至少包括多播 控制信道 ( MCCH, Multicast Control Channel ) 。
进一步地, MBMS通知消息可以承载于 PDCCH的公共检索区域内, 以 便于需要检索的终端能够快速的检索到相应的信息, 有利于终端省电。 当然 也可以承载在 PDCCH的非公共检索区域,只是承载在 PDCCH的非公共检索 区域时, 终端对于 MBMS通知消息的检索时间可能要稍长一些。
为了进一步说明本发明, 下面结合附图和实施例进行详细说明。
实施例 1
本实施例把 MBMS通知消息承载在 MBSFN子帧中 ,进一步使用 M-RNTI 通过 PDCCH中来传输 MBMS通知消息 , 该 M-RNTI为非 RNTI为 SI-RNTI 或者 P-RNTI或者 RA-RNTI的约定的 RNTI。其中,可以承载于 MBSFN子帧 的前 1个或者 2个 OFDM, 如图 1和图 2所示。
在 PDCCH中承载的 MBMS通知消息可以通过约定的 RNTI实现,其中, 约定的 RNTI是指通过 LTE R9协议规定好的, 不需要另外通知终端的。 具体 的做法如图 3所示,可以为:在 MBMS通知消息中,加入循环冗余校验( Cyclic Redundancy Check, CRC ) 比特, 然后使用约定的 RNTI将 CRC进行加扰, 如可以按位异或(具体可以参考 36.212— 870中 5.3.3.2章节的方法)。 这样就 把约定的 RNTI隐含在加入 CRC校验比特的 MBMS通知消息中了。 然后对 所得数据进行调制和信道编码后, 然后再经过交织等协议约定的必要的处理 得到待发送数据。 对待发送数据发送时具体为, 把待发送数据承载在所选的 MBSFN 子帧的 PDCCH 的公共检索区域, 这样便于终端快速检索到包含 M-RNTI 的 MBMS 通知消息。 具体为在 MBMS 通知消息发送时刻直接在 MBSFN子帧上发送。
因为在 PDCCH的公共检索区域内可能包含有其他信令, 将上述约定的 RNTI隐含在加入 CRC校验比特的 MBMS通知消息中 ,是为了标识该 MBMS 通知消息,文中将该 RNTI表示为 M-RNTI。终端完成对公共检索区域内某个 信令的译码后, 用 M-RNTI对其中的 CRC校验比特进行解扰, 然后利用解扰 后的 CRC检验比特来校验该信令,如校验通过,则可以判定该信令为 MBMS 通知消息。
进一步地, 由于 MBMS通知消息应该具有较高的可靠性, 加上所述公共 检索区域足购大,建议釆用 8个控制信道单元( Control Channel Element, CCE ) 对应的调制编码方式( Modulation and Coding Scheme, MCS )进行发送。
本实施例可以获得以下益处:
根据目前的 LTE协议, 在子帧的 PDCCH的公共检索区域中同时最多承 载包含 SI-RNTI、 RA-RNTI以及 P-RNTI的信息, 具体的包含方式和上述包 含 M-RNTI的方式(即作为扰码加扰 CRC校验比特)相同。 由于 SI-RNTI、 RA-RNTI以及 P-RNTI可能同时在一个子帧内出现, 这样再增加一个约定的 M-RNTI的 MBMS通知消息 , 就会造成该子帧的 PDCCH的公共检索区域中 承载不下, 或者达不到承载的 MCS要求, 所以必须避免 4个 RNTI对应信息 同时在子帧的 PDCCH的公共检索区域中出现;
根据 LTE R9协议的规定, SI-RNTI、 P-RNTI对应的信息不会在 MBSFN 子帧中出现, 这样本实施例把 MBMS通知消息承载在 MBSFN子帧中, 从而 避免上述 4个 RNTI同时在一个子帧的 PDCCH公共检索区域中出现。从而实 现了 MBMS 通知消息的发送, 并且是把 MBMS 通知消息承载在子帧的 PDCCH公共检索区域发送的,便于终端快速检索,节电。 同时不影响 LTE R8 的终端接收和检索 PDCCH的公共检索区域。 对于 LTE R9协议影响很小。 实施例 2
本实施例把 MBMS通知消息承载在用于发送 MBMS业务的 MBSFN子 帧中。 进一步通过复用已有的已经确定放置在公共检索区域中的其他三个 RNTI, 即 RNTI为 SI-RNTI或者 P-RNTI或者 RA-RNTI来实现 MBMS通知 消息在所选子帧的 PDCCH公共检索区域传输。 具体使用 SI-RNTI、 P-RNTI 和 RA-RNTI中的一个或者多个是需要协议来规定约定下来的,此时不再需要 信令通知终端。 利用在 MBSFN 子帧中不会使用的 SI-RNTI、 P-RNTI 或 RA-RNTI作为 M-RNTI , 可以节约 RNTI资源。
在一个 MCCH信息的修改周期内发送 MBMS 通知消息时, 选择承载
MBMS 业务的合适的 MBSFN子帧进行承载 MBMS 通知消息, 具体是在 MBSFN子帧中的 PDCCH中发送。 由于 MBMS通知消息的发送本身就是有 规律的, 例如周期性发送, 如果知道了 MBMS通知消息发送周期以及起始时 间, 就可以推测出每个 MBMS 通知消息的发送时刻, 从而可以找到合适的 MBSFN子帧。
具体为: 把 MBMS通知消息加入 CRC校验比特, 然后用 SI-RNTI或者 中 5.3.3.2章节的方法) , 然后把所得信息进行信道编码, 然后再经过必要的 处理得到待发送数据。 对待发送数据发送时具体为, 把待发送数据承载在所 选的 MBSFN子帧的 PDCCH的公共检索区域,这样便于终端快速检索到包含 SI-RNTI或者 P-RNTI或者 RA-RNTI的 MBMS通知消息。
按照本发明上述的实施, 可以获得以下益处。 根据目前的 LTE协议, 在 子帧的 PDCCH的公共检索区域中同时最多承载包含 SI-RNTL RA-RNTI以 及 P-RNTI的信息。由于上述的 SI-RNTI、RA-RNTI以及 P-RNTI不会在 MBSFN 子帧中出现( RA-RNTI协议没有规定, SI-RNTI和 P-RNTI肯定不会在 MBSFN 子帧中出现) , 所以此时恰好利用 SI-RNTI、 RA-RNTI以及 P-RNTI中的一 个作为 M-RNTI来在 MBSFN子帧中的 PDCCH公共检索区域中标识 MBMS 通知消息, 来实现 MBMS通知消息的发送。 这样更不会造成子帧的 PDCCH 公共检索区域承载不下的问题,也可以为系统节约一个 RNTI,便于终端快速 检索, 节电。
实施例 3
在本实施例中, 引入 MBMS通知消息发送时间窗, 釆用时间窗机制选择 合适的子帧发送 MBMS通知消息, 这样可以便于发送端调度。
例如为 MBMS通知消息弓 I入一个 10ms的时间窗,那么当 MBMS通知消 息的发送周期到来时, 再延长 10ms的发送窗, 即从 MBMS通知消息周期到 来时刻到之后的 10ms内,发送端可以选择空闲的子帧或对其他业务的调度影 响最小的子帧进行承载 MBMS通知消息,这样可以为发送端在调度上提供方 便。 该时间窗可以以毫秒为单位计数, 也可以是以无线帧个数, 例如规定时 间窗长度为 1个无线帧, 即 MBMS通知消息的发送的无线帧, 从该无线帧内 选择合适的子帧来承载 MBMS通知消息。 如果不引入此机制, 当 MBMS通 知消息发送周期到来时,此时发送端忙于调度其他业务 艮设业务比较繁忙 ), 没有时间调度 MBMS通知消息, 那么就会耽误 MBMS通知消息的发送, 或 者调度了 MBMS通知消息耽误了其他业务的调度。一旦引入了发送时间窗的 机制, 发送端可以在下一个子帧中调度 MBMS通知消息。 这样增强了系统的 鲁棒性, 使调度更加灵活。
接收端在通知消息周期到来的时间窗内逐个子帧检索 PDCCH上是否有 约定的 RNTI, 直到检索到约定的 RNTI, 获取 MBMS通知消息。
其中, 空闲的子帧或对其他业务的调度影响最小的子帧为 MBSFN子帧 或非 MBSFN子帧中除寻呼子帧外的其他子帧。 发送端优先在时间窗内选择 MBSFN子帧承载 MBMS通知消息。 当然其他子帧也是可以的。
发送时间窗可以以约定的方式固定下来, 也可以由发送端配置, 配置后 通知接收端时间窗长度。 上例是釆用约定的方式。优先考虑约定时间窗长度, 例如约定时间窗长度为 10ms或者一个无线帧。
实施例 4
本实施例把 MBMS通知消息承载在用于发送 MCCH信息的 MBSFN子 帧内, 即把 MBMS通知消息承载在部分或者全部的 MCCH信息所在子帧的 PDCCH中。
由于 MCCH信息是按照周期发送的, 其周期和 MBMS通知消息的发送 周期可能存在周期不一致的情况, 此时可以设置两者的周期相差整数倍, 并 且 MBMS通知消息的发送周期大于或等于 MCCH信息的周期, 这样可以保 证每个 MBMS 通知消息的发送周期中都至少包含一个发送 MCCH信息的 MBSFN子帧 ,从而可以 4巴 MBMS通知消息 7 载于部分或全部发送 MCCH信 息的 MBSFN子帧的 PDCCH中。
由于 MCCH信息的周期分为重复周期和修改周期, 一般 MCCH修改周 期( MCCH modification period )是 MCCH信息的重复周期( MCCH repetition period ) 的整数倍, 所以一个修改周期内包含一个或若干个 MCCH信息的重 复周期, 并且规定一个修改周期内的每个重复周期发送的 MCCH信息相同。 同样, 如果把 MBMS通知消息承载于部分或全部 MCCH信息的重复周期处 发送 MCCH信息的 MBSFN子帧内, 同样遵守一个 MCCH信息的修改周期 内, 多次发送的 MBMS通知消息不允许改变。
上述承载在 PDCCH 中, 具体是优先考虑把 MBMS 通知消息承载于 PDCCH的公共检索区域内以便于终端快速检索。提供其中一种操作,但不限 于此操作, 把 MBMS通知消息内容添加 CRC校验比特, 然后使用一个约定 的 RNTI (此处可以参考实施例 1、 2 )把所得 CRC检验比特加扰。 然后再按 照协议规定信道编码等进行后续处理, 再映射到 PDCCH公共检索区域进行 发送。
本实施例为实现上述发送方法的发送装置,包括 MBMS通知消息生成模 块和 MBMS通知消息发送模块, 其中:
MBMS通知消息生成模块, 用于构建 MBMS通知消息;
MBMS通知消息发送模块, 用于从 MBMS通知消息发送时刻开始的一 段时间窗内选择空闲的子帧或对其他业务的调度影响最小的子帧中的 PDCCH发送 MBMS 通知消息; 或者, 在承载 MBMS 业务的部分或全部 MBSFN子帧的 PDCCH发送 MBMS通知消息生成模块构建好的 MBMS通知 消息。
其中,优选 MBMS通知消息承载在所述物理下行控制信道中的公共检索 区域。
MBMS通知消息生成模块构建 MBMS通知消息时, 在 MBMS通知消息 中加入循环冗余校验比特,并将用于标识所述 MBMS通知消息的约定的无线 网络临时标识(RNTI )作为扰码, 对所述循环冗余校验比特进行加扰。
MBMS通知消息发送模块在 MBMS通知消息发送时刻发送 MBMS通知 消息时, 将承载有 MCCH的 MBSFN子帧作为所述承载 MBMS通知消息的 MBSFN子帧,并将所述 MBMS通知消息的发送周期设置为 MCCH信息的重 复周期的整数倍。
工业实用性
与现有技术相比, 本发明的方法和装置, 不会造成子帧的 PDCCH公共 检索区域承载不下的问题, 也可以为系统节约一个 RNTI。

Claims

权 利 要 求 书
1、一种多媒体广播和组播业务(MBMS )通知消息的发送方法,其包括: 从所述 MBMS 通知消息发送时刻开始的一段时间窗内选择空闲的子帧 或对其他业务的调度影响最小的子帧中的物理下行控制信道(PDCCH )发送 所述 MBMS通知消息; 或者,
使用多播广播单频网络(MBSFN )子帧中的 PDCCH发送所述 MBMS 通知消息。
2、 如权利要求 1所述的发送方法, 其中, 所述 MBMS通知消息承载在 所述空闲的子帧或对其他业务的调度影响最小的子帧中的 PDCCH的公共检 索区域内, 或者 所述 MBMS通知消息承载在承载 MBMS业务的部分或全部 MBSFN子 帧中的 PDCCH的公共检索区域内。
3、 如权利要求 1所述的发送方法, 其中, 所述空闲的子帧或对其他业务 的调度影响最小的子帧为 MBSFN子帧或非 MBSFN子帧中除承载寻呼消息 的子帧外的其他子帧。
4、 如权利要求 1或 2或 3所述的发送方法, 其在发送所述 MBMS通知 消息的步骤之前还包括:
在所述 MBMS 通知消息中加入循环冗余校验比特, 并将用于标识所述 MBMS通知消息的约定的无线网络临时标识( RNTI )作为扰码, 对所述循环 冗余校验比特进行加扰。
5、 如权利要求 4所述的发送方法, 其中:
所述约定的 RNTI是通过长期演进系统 R9协议规定好的小区无线网络临 时标识的中的一个; 或者,
所述约定的 RNTI为复用的系统消息无线网络临时标识(SI-RNTI ) 、 随 机接入无线网络临时标识 ( RA-RNTI ) 或寻呼消息无线网络临时标识 ( P-RNTI ) 中的一个。
6、 如权利要求 2所述的发送方法, 所述 MBMS业务包括: MBMS业务 数据、 MBMS控制信息。
7、 如权利要求 6所述的发送方法, 其中:
所述承载 MBMS业务的部分或全部 MBSFN子帧为承载有多播控制信道 信息 (MCCH ) 的 MBSFN子帧, 所述 MBMS通知消息的发送周期设置为 MCCH信息的重复周期的整数倍。
8、 如权利要求 2所述的发送方法, 其中: 通知消息的步骤中, 所述 MBMS通知消息是承载于在部分或全部 MCCH信 息的重复周期中发送 MCCH信息的 MBSFN子帧内进行发送的,一个 MCCH 信息的修改周期内, 多次发送的 MBMS通知消息不改变。
9、 如权利要求 1所述的发送方法, 在从所述 MBMS通知消息发送时刻 开始的一段时间窗内选择空闲的子帧或对其他业务的调度影响最小的子帧中 的 PDCCH发送所述 MBMS通知消息的步骤之前还包括:
发送端配置时间窗的长度, 并把配置信息通知给接收端; 或者
发送端和接收端约定固定的时间窗长度, 所约定的固定的时间窗长度为 10ms或 1个无线帧。
10、 一种多媒体广播和组播业务(MBMS )通知消息的发送装置, 其包 括 MBMS通知消息生成模块和 MBMS通知消息发送模块, 其中:
所述 MBMS通知消息生成模块, 设置成构建所述 MBMS通知消息; 所述 MBMS通知消息发送模块, 设置成从所述 MBMS通知消息发送时 刻开始的一段时间窗内选择空闲的子帧或对其他业务的调度影响最小的子帧 中的物理下行信道(PDCCH )发送所述 MBMS通知消息生成模块构建好的 MBMS通知消息; 或者, 在多播广播单频网络 (MBSFN)子帧中的 PDCCH上 发送所述 MBMS通知消息生成模块构建好的 MBMS通知消息。
11、 如权利要求 10所述的发送装置, 其中, 所述 MBMS通知消息承载 在所述空闲的子帧或对其他业务的调度影响最小的子帧中的 PDCCH的公共 检索区域内, 或者 所述 MBMS通知消息承载在承载 MBMS业务的部分或全部 MBSFN子 帧中的 PDCCH的公共检索区域内。
12、 如权利要求 10或 11所述的发送装置, 其中:
所述 MBMS通知消息生成模块还设置成在构建 MBMS通知消息时, 在 所述 MBMS通知消息中加入循环冗余校验比特, 并将用于标识所述 MBMS 通知消息的约定的无线网络临时标识(RNTI )作为扰码, 对所述循环冗余校 验比特进行加扰。
13、 如权利要求 11所述的发送装置, 其中:
所述 MBMS 通知消息发送模块还设置成在将承载有多播控制信道信息 ( MCCH ) 的 MBSFN子帧作为承载 MBMS业务的 MBSFN子帧, 并将所述 MBMS通知消息的发送周期设置为 MCCH信息的重复周期的整数倍。
PCT/CN2009/075509 2009-07-28 2009-12-11 一种多媒体广播和组播业务通知消息的发送方法和装置 WO2011011946A1 (zh)

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