WO2011038660A1 - 一种mbms通知信息的传输方法及系统 - Google Patents
一种mbms通知信息的传输方法及系统 Download PDFInfo
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- WO2011038660A1 WO2011038660A1 PCT/CN2010/077288 CN2010077288W WO2011038660A1 WO 2011038660 A1 WO2011038660 A1 WO 2011038660A1 CN 2010077288 W CN2010077288 W CN 2010077288W WO 2011038660 A1 WO2011038660 A1 WO 2011038660A1
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- mcchs
- dci format
- notification information
- cell
- mbms
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 210000004027 cell Anatomy 0.000 description 23
- 230000005540 biological transmission Effects 0.000 description 5
- 238000011161 development Methods 0.000 description 3
- RASFMBBIZLUCME-UHFFFAOYSA-N methyl 2-amino-3-[(2-amino-3-methoxycarbonylphenyl)methyl]benzoate Chemical compound COC(=O)C1=CC=CC(CC=2C(=C(C(=O)OC)C=CC=2)N)=C1N RASFMBBIZLUCME-UHFFFAOYSA-N 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000013468 resource allocation Methods 0.000 description 3
- 230000011664 signaling Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000013507 mapping Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- TZSMWSKOPZEMAJ-UHFFFAOYSA-N bis[(2-methoxyphenyl)methyl] carbonate Chemical compound COC1=CC=CC=C1COC(=O)OCC1=CC=CC=C1OC TZSMWSKOPZEMAJ-UHFFFAOYSA-N 0.000 description 1
- 210000004271 bone marrow stromal cell Anatomy 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
Definitions
- the present invention relates to an LTE (Long Term Evolution) system, and in particular to a method and system for transmitting Multimedia Broadcast Multicast Service (MBMS) MBMS Notification information.
- LTE Long Term Evolution
- MBMS Multimedia Broadcast Multicast Service
- 3rd Generation Partnership Project 3rd Generation Partnership Project
- the Partnership Project (3GPP) proposes the MBMS service, which is a technology for transmitting data from one data source to multiple targets, realizing the sharing of resources (including core network and access network) and improving network resources (especially Is the utilization of air interface resources).
- the MBMS defined by 3GPP can not only realize low-rate plain text message class multicast and broadcast, but also realize high-speed multimedia service broadcast and multicast, and provide a variety of rich video and audio multimedia services, which undoubtedly conforms to the future development of mobile data. The trend has provided 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 are semi-static, that is, the scheduling information and signaling information of the MBMS service are all "long-term" unchanged, so that each MCCH (MBMS Point to-multi- Point Control Channel, MBMS point-to-multipoint control channel), the system side sends a message without change (always sent because new users may be accessed at any time).
- MCCH MBMS Point to-multi- Point Control Channel, MBMS point-to-multipoint control channel
- a terminal that has received the MCCH information it is not necessary to receive an MCCH information that has not changed every time, which will cause the terminal to charge power, because the MCCH information is large, and the receiving and parsing process consumes power.
- a MCCH letter Information update indication information ie, MCCH change notification, or MBMS notification indicator, which may be referred to as an MBMS notification message, an MBMS notification message, or an MBMS notification indication, etc.
- the terminal only needs to monitor a small amount of information, and according to the MBMS notification message terminal, it decides whether to receive the MCCH information, thereby saving power.
- the MBMS service transmission area may overlap.
- the eMBMS (Evolved MBMS) system may have multiple MCCHs. Each MCCH corresponds to a different MBMS service transmission area, and only the MBMS service sent by the corresponding MBMS service transmission area is carried. Control information.
- the number of MCCHs depends on the MBMS service occurrence area to which the service in the cell belongs, so the number of MCCHs is variable.
- the technical problem to be solved by the present invention is to provide a method and system for transmitting MBMS notification information, thereby transmitting MBMS notification information in the case where a plurality of MCCHs and MCCH numbers are changed.
- the present invention provides a method for transmitting MBMS notification information, including:
- the system side When the number of MCCHs used in the current cell is updated, the system side notifies the user equipment of the number of MCCHs used in the updated cell by using the system message, and sets the number of MCCHs and the downlink control information (DCI) format that are set in advance.
- DCI downlink control information
- the DCI format corresponding to the number of MCCHs used in the updated cell is searched, and the MBMS notification information is carried by the found DCI format, and the MBMS notification information is sent to the user equipment.
- the method further includes: the user equipment receives the system message, obtains the number of MCCHs used in the updated cell, and searches for the MCCH used in the acquired cell from the corresponding relationship between the number of MCCHs and the DCI format.
- the DCI format corresponding to the number of bars detects and receives the MBMS notification information using the DCI format found.
- the number of MCCHs is proportional to the number of bits occupied by the corresponding DCI format.
- the correspondence between the number of MCCHs and the DCI format includes a new DCI format.
- the corresponding DCI formats are the same or different.
- the invention also discloses a system for transmitting MBMS notification information, comprising a network side device and a user device, wherein:
- the network side device is configured to send a system message to the user equipment when the number of MCCHs used in the current cell is updated, where the system message includes the number of MCCHs used in the updated cell, and the number of MCCHs that are set in advance.
- the DCI format the DCI format corresponding to the number of MCCHs used in the updated cell is searched, and the MBMS notification information is carried by the found DCI format, and the MBMS notification information is sent to the user equipment;
- the user equipment is configured to receive the system message, obtain the number of MCCHs used in the updated cell, and search for the number of MCCHs used in the acquired cell from the corresponding relationship between the number of MCCHs and the DCI format.
- the DCI format detects and receives MBMS notification information using the DCI format found.
- the number of MCCHs is proportional to the number of bits occupied by the corresponding DCI format.
- the correspondence between the number of MCCHs and the DCI format includes a new DCI format.
- the corresponding DCI formats are the same or different.
- the present invention has different data requirements for transmitting MBMS notification information according to different numbers of MCCH channels, and flexibly selects existing downlink control information (DCI) format to carry MBMS notification information; and does not increase the premise of UE processing.
- DCI downlink control information
- Figure 1 is a flow chart of the method of the present invention
- FIG. 2 is a schematic diagram of a network in the first embodiment
- Fig. 3 is a flow chart of the first embodiment.
- the PDCCH Physical Downlink Control Channel
- the command correspondingly, DCI (Downlink Control Information) format (format) can be divided into the following (where the number of bits is changed according to the bandwidth):
- DCI format 0 used to send resource allocation information of the uplink SCH (Shared Channel) (approximately 38 bits, 20 MHz bandwidth, 4 transmit antennas, including 16-bit CRC);
- DCI format 1 is used to send resource allocation information (about 56 bits) in the case of single-antenna port/transmit diversity (single rank open-loop scheme);
- DCI format 2 used to transmit resource allocation information (about 72 bits) in the case of downlink MIMO (open loop/closed loop multiplexing);
- DCI format 3 is used to transmit a 2-bit power control command (about 38 bits) for PUSCH (Physical Uplink Share Channel) and PUCCH (Physical Uplink Control Channel).
- PUSCH Physical Uplink Share Channel
- PUCCH Physical Uplink Control Channel
- formatl which can also be subdivided into 1A, 1B, 1C or ID for different occasions, and the number of bits it can carry is also different.
- the technical solution of the present invention forms a mapping relationship between the MBMS notification information and the PDCCH DCI format.
- the number of MCCH channels changes, it means that the number of bits of the MBMS notification information changes, and the PDCCH DCI format can be used to carry.
- the MBMS notification information so that the UE can know the number of MCCHs in the current cell according to the system message, and correspondingly
- the mapping relationship can be used to know which PDCCH DCI format the MBMS notification information in the current cell is in, and use the corresponding DCI format to detect and receive the MBMS notification message, as shown in FIG.
- the system side (for example, the eNB or the BMSC broadcasts the multicast service center, etc.) and the UE side may
- the corresponding relationship between the number of MCCHs and the DCI format is notified to the UE by the signaling.
- the correspondence between the number of MCCHs and the DCI format can be as shown in Table 1:
- Table 1 shows the correspondence between the number of MCCHs and the DCI format.
- the specific correspondence between the number of MCCHs and the DCI format may be based on the data load of the MBMS notification message under different MCCH numbers to select a corresponding DCI format (ie, the more the number of MCCHs, the data load of the MBMA notification message is also The larger, choose the DCI format with large resources);
- a system for transmitting MBMS notification information including a network side device and a UE.
- the network side device sends a system message to the UE, where the system message includes the number of MCCHs used in the updated cell, and the number of MCCHs and the DCI format set in advance.
- the DCI format corresponding to the number of MCCHs used in the updated cell is searched, and the MBMS notification information is carried by the found DCI format, and the MBMS notification information is sent to the UE;
- the UE is configured to receive the system message, obtain the number of MCCHs used in the updated cell, and search for the corresponding number of MCCHs used in the acquired cell from the correspondence between the number of MCCHs and the DCI format that are set in advance.
- the DCI format detects and receives MBMS notification information by using the found DCI format;
- the corresponding relationship between the number of MCCHs and the DCI format may include a new DCI format, that is, when the existing DCI format is insufficient, a new DCI format (ie, a new DCI format) may be designed to match a certain number of MCCHs.
- the larger the number of MCCHs the greater the data load of the MBMA notification message. Therefore, the corresponding DCI is the larger the number of MCCHs and the DCI format. The more bits the format occupies.
- two MCCHs are configured in a cell as an example (as shown in FIG. 2), and the process of transmitting MBMS notification information is illustrated.
- the process is as shown in FIG. 3, and includes the following steps:
- Step 301 The system side sends the configuration information of the two MCCH channels to the UE in the system message, and selects one DCI format corresponding to the two MCCHs to carry the MBMS notification according to the corresponding relationship between the number of MCCHs and the DCI format.
- the correspondence between the number of MCCHs and the DCI format is agreed by the system side and the UE side in advance. If the existing DCI format is insufficient, a new DCI format (ie, a new DCI format) can be designed to match an MCCH.
- MBMS notification message under the number of bars;
- the MBMA notification message data is considered when the number of MCCHs is increased.
- the load is also larger. Therefore, in the correspondence between the number of MCCHs and the DCI format set in advance, the number of bits occupied by the MCCH corresponding to the DCI format is larger.
- Step 302 The UE receives the foregoing system message, and learns from the system message that two MCCHs are configured in the current cell, and according to the corresponding relationship between the number of MCCHs and the DCI format, the MBMS notification information in the current cell is used.
- Step 303 The UE detects and receives the MBMS notification information according to the found DCI format.
- Step 304 During the running of the system, if the MCCH is added to the cell, the system side updates the system message, and according to the added number of MCCHs, the number of MCCHs and the DCI format are set. Corresponding DCI format is selected in the corresponding relationship, and the MBMS notification information is carried by the DCI format and sent to the UE;
- Step 305 The UE receives the updated system message, and according to the content of the updated system message, the number of MCCHs used in the current cell is 3, and the new one is learned according to the corresponding relationship between the number of MCCHs and the DCI format.
- the MBMS notification information will be carried by which DCI format to use;
- Step 306 The UE detects and receives the MBMS notification information according to the new DCI format.
- the present invention has different data requirements for transmitting MBMS notification information according to different numbers of MCCH channels, and flexibly selects an existing PDCCH DCI format to carry MBMS notification information; and avoids fixed configuration of one capable bearer without increasing UE processing.
- the PDCCH DCI format with more data is wasted when the number of MCCHs is small.
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Description
一种 MBMS通知信息的传输方法及系统 技术领域
本发明涉及 LTE ( Long Term Evolution, 长期演进 )系统 , 特别涉及一种 多媒体广播和组播业务( Multimedia Broadcast Multicast Service, MBMS )通 知信息 ( MBMS Notification information ) 的传输方法及系统。
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、 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、 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, 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 不仅能够实现低速率纯文本消息类组播和广播, 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、控制信令配置都是半静态的, 即 MBMS业务的调度信息、 信令信息都是 "长期" 保持不变的, 这样每个 MCCH ( MBMS Point to-multi-point Control Channel , MBMS点到多点控制信 道)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(即 MCCH change notification,或 MBMS notification Indicator, 可称为 MBMS通知消息、 MBMS通知信息或 MBMS通知指示等) , 用少量 的物理层信息来描述 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, 从而起到省电的效果。
另外由于 MBMS业务发送区域可能出现交叠的情况, eMBMS (演进型 MBMS ) 系统可能存在多个 MCCH, 每个 MCCH对应于不同的 MBMS业务 发送区域, 其中仅承载对应 MBMS业务发送区域发送的 MBMS业务的控制 信息。其中, MCCH的数目取决于小区中所配业务所属 MBMS业务发生区域, 因此 MCCH的数目是可变的。
由上可知, 目前在 LTE中, 急需提出一种新的 MBMS通知消息的机制, 以适用多个 MCCH且 MCCH数目变化的场景。
发明内容
本发明所要解决的技术问题是,提供一种 MBMS通知信息的传输方法及 系统, 从而在多个 MCCH且 MCCH数目变化的情况下, 传输 MBMS通知信 息。
为了解决上述技术问题,本发明提供了一种 MBMS通知信息的传输方法 包括:
当当前小区中使用的 MCCH条数发生更新时, 系统侧通过系统消息将更 新后小区中使用的 MCCH条数通知给用户设备, 并从事先设定的 MCCH条 数与下行控制信息 (DCI )格式的对应关系中, 查找与更新后小区中使用的 MCCH条数对应的 DCI格式, 釆用所查找到的 DCI格式承载 MBMS通知信 息, 将 MBMS通知信息发送给用户设备。
上述方法还包括: 用户设备接收系统消息, 从中获取更新后小区中使用 的 MCCH条数, 并从事先设定的 MCCH条数与 DCI格式的对应关系中, 查 找与所获取的小区中使用的 MCCH条数对应的 DCI格式, 釆用所查找到的 DCI格式检测及接收 MBMS通知信息。
上述方法中, MCCH条数与 DCI格式的对应关系中, MCCH条数与其对 应的 DCI格式所占用的比特数成正比。
上述方法中, MCCH条数与 DCI格式的对应关系中包括新增 DCI格式。 上述方法中, MCCH条数与 DCI格式的对应关系中, MCCH条数不同时, 对应的 DCI格式相同或不同。
本发明还公开了一种传输 MBMS通知信息的系统,包括网络侧设备和用 户设备, 其中:
网络侧设备设置为在当前小区中使用的 MCCH条数发生更新时,向用户 设备发送系统消息, 该系统消息中包括更新后小区中使用的 MCCH条数, 以 及从事先设定的 MCCH条数与 DCI格式的对应关系中,查找与更新后小区中 使用的 MCCH条数对应的 DCI格式, 釆用所查找到的 DCI格式承载 MBMS 通知信息, 将 MBMS通知信息发送给用户设备;
用户设备设置为接收系统消息,从中获取更新后小区中使用的 MCCH条 数,并从事先设定的 MCCH条数与 DCI格式的对应关系中,查找与所获取的 小区中使用的 MCCH条数对应的 DCI格式, 釆用所查找到的 DCI格式检测 及接收 MBMS通知信息。
上述系统中, MCCH条数与 DCI格式的对应关系中, MCCH条数与其对 应的 DCI格式所占用的比特数成正比。
上述系统中, MCCH条数与 DCI格式的对应关系中包括新增 DCI格式。 上述系统中, MCCH条数与 DCI格式的对应关系中, MCCH条数不同时, 对应的 DCI格式相同或不同。
本发明根据 MCCH信道数目不同, 对传输 MBMS通知信息的数据需求 不同,灵活地选择已有的 PDCCH下行控制信息( downlink control information, DCI ) format来承载 MBMS通知信息; 且在不增加 UE处理的前提下, 避免 了固定配置一个能承载较多数据的 PDCCH DCI format在 MCCH数目少时的 资源浪费。
附图概述
图 1为本发明方法的流程图;
图 2为本实施例 1中网络示意图;
图 3为本实施例 1的流程图。
本发明的较佳实施方式
本发明的主要构思是, 现有 LTE系统中, PDCCH ( Physical Downlink Control Channel, 物理下行控制信道)一般传输三种信息, 即: 下行数据传输 的调度信息、上行数据传输的调度信息以及上行功率控制命令,相应地, DCI ( Downlink Control Information, 下行控制信息) format (格式)可以分为以 下几种(其中, 比特数是根据带宽变化的) :
DCI format 0, 用于发送上行 SCH ( Shared Channel共享信道) 的资源分 配信息, (约 38比特, 20MHz带宽、 4发送天线, 含 16比特 CRC ) ;
DCI format 1 , 用于发送下行 SIMO ( single-antenna port/transmit diversity, single rank open-loop scheme )情况下的资源分配信息 (约 56比特) ;
DCI format 2, 用于发送下行 MIMO (开环 /闭环复用)情况下的资源分 配信息 (约 72比特) ;
DCI format 3 , 用于发送对于 PUSCH ( Physical Uplink Share Channel, 物 理上行共享信道 )和 PUCCH ( Physical Uplink Control Channel, 物理上行控制 信道) 的 2比特功率控制指令 (约 38比特) 。
另夕卜, 对于 DCI的各个格式, 还有不同的选择, 比如 formatl , 还可细分 为 1A、 1B、 1C或者 ID, 分别用于不同的场合, 并且其所能承载的比特数也 是不同的。
因此, 本发明技术方案将 MBMS通知信息与 PDCCH DCI format之间形 成映射关系, 当 MCCH信道的数目变化时, 也就意味着 MBMS通知信息的 比特数改变, 即可使用不同的 PDCCH DCI format来承载 MBMS通知信息, 这样, UE根据系统消息就可以知道当前小区中 MCCH的数目, 并通过相应
的映射关系 ,可以知道当前小区中 MBMS通知信息 载于哪个 PDCCH DCI format中 , 就用对应的 DCI format来检测和接收 MBMS通知消息即可, 如图 1所示。
其中, 系统侧 (如, eNB或者 BMSC广播多播业务中心等)与 UE侧可
MCCH条数与 DCI format的对应关系, 再通过信令将该对应关系通知给 UE, 例如, MCCH条数与 DCI format的对应关系可以如表 1所示:
表 1为 MCCH条数与 DCI format的对应关系表
在不同实施例中, MCCH条数与 DCI format的具体对应关系可以根据不 同 MCCH条数下 MBMS通知消息的数据负荷来选择相应的 DCI格式(即 MCCH条数越多时, MBMA通知消息的数据负荷也越大, 就选择资源大的 DCI格式) ;
另外, 对于不同 MCCH条数下使用相同 DCI格式来承载 MBMS通知消 息也是允许的, 此时可能在某些情况下, 有一些资源浪费。
下面结合附图及具体实施例对本发明技术方案作进一步详细说明。
一种传输 MBMS通知信息的系统, 包括网络侧设备和 UE。
网络侧设备在当前小区中使用的 MCCH条数发生更新时, 向 UE发送系 统消息, 该系统消息中包括更新后小区中使用的 MCCH条数, 并从事先设定 的 MCCH条数与 DCI格式的对应关系中,查找与更新后小区中使用的 MCCH 条数对应的 DCI格式, 釆用所查找到的 DCI格式承载 MBMS通知信息, 将 该 MBMS通知信息发送给 UE;
UE用于接收系统消息, 从中获取更新后小区中使用的 MCCH条数, 并 从事先设定的 MCCH条数与 DCI格式的对应关系中,查找与所获取的小区中 使用的 MCCH条数对应的 DCI格式, 釆用所查找到的 DCI格式检测及接收 MBMS通知信息;
其中, MCCH条数与 DCI格式的对应关系中可以包括新增的 DCI格式, 即当现有 DCI格式不够时, 可以设计新的 DCI格式(即新增 DCI格式 )以匹 配某个 MCCH条数下的 MBMS通知消息; 不同的 MCCH条数可以对应相同 或者不同的 DCI格式。
在优选的实施例中, 考虑到 MCCH条数越多时, MBMA通知消息的数 据负荷也越大, 因此, 事先设定的 MCCH条数和 DCI格式的对应关系中, 数越大, 其对应的 DCI格式所占用的比特数也就越多。
实施例 1
本实施例以小区中配置两条 MCCH为例(如图 2所示),说明传输 MBMS 通知信息的过程, 该过程如图 3所示, 包括以下步骤:
步骤 301 : 系统侧在系统消息中将两条 MCCH信道的配置信息发送给 UE, 同时根据设定的 MCCH条数和 DCI格式的对应关系, 选择两条 MCCH 对应的一种 DCI格式来承载 MBMS通知信息;
该步骤中, MCCH条数和 DCI格式的对应关系是系统侧与 UE侧事先约 定好的, 如果现有 DCI格式不够, 也可以设计新的 DCI格式(即新增 DCI 格式 ) 以匹配某个 MCCH条数下的 MBMS通知消息;
在优选实施例中, 考虑到 MCCH条数越多时, MBMA通知消息的数据
负荷也越大,因此,事先设定的 MCCH条数和 DCI格式的对应关系中, MCCH 其对应的 DCI格式所占用的比特数也就越多。
步骤 302: UE接收上述系统消息, 从该系统消息中获知当前小区中配置 了两条 MCCH, 同时根据设定的 MCCH条数和 DCI格式的对应关系, 查找 当前小区中的 MBMS通知信息将使用哪种 DCI格式来承载;
步骤 303: UE按照查找到的 DCI格式对 MBMS通知信息进行检测和接 收;
步骤 304: 在系统运行过程中, 由于业务的发起, 如果小区中将增加一 条 MCCH, 此时, 系统侧更新系统消息, 同时根据增加后的 MCCH条数, 从 设定的 MCCH条数和 DCI格式的对应关系中选择相应的 DCI格式, 釆用该 DCI格式承载 MBMS通知信息, 发送给 UE;
步骤 305: UE接收上述更新的系统消息, 根据更新的系统消息的内容, 可以获知当前小区中使用的 MCCH条数为 3 ,同时根据设定的 MCCH条数和 DCI格式的对应关系 ,获知新的 MBMS通知信息将由使用哪种 DCI格式来承 载;
步骤 306: UE按照新的 DCI格式对 MBMS通知信息进行检测和接收。
以上所述, 仅为本发明的实施例, 并非用于限定本发明的保护范围, 凡 在本发明的精神和原则之内所作的任何修改、 等同替换和改进等, 均应包含 在本发明所附的权利要求的保护范围之内。
工业实用性
本发明根据 MCCH信道数目不同, 对传输 MBMS通知信息的数据需求 不同, 灵活地选择已有的 PDCCH DCI format来承载 MBMS通知信息; 且在 不增加 UE处理的前提下, 避免了固定配置一个能承载较多数据的 PDCCH DCI format在 MCCH数目少时的资源浪费。
Claims
1、 一种多媒体广播和组播业务 MBMS通知信息的传输方法, 包括: 当当前小区中使用的 MBMS点到多点控制信道 MCCH条数发生更新时, 系统侧通过系统消息将更新后小区中使用的 MCCH条数通知给用户设备,并 从事先设定的 MCCH条数与下行控制信息 DCI格式的对应关系中,查找与所 述更新后小区中使用的 MCCH条数对应的 DCI格式, 釆用所查找到的 DCI 格式承载 MBMS通知信息, 将所述 MBMS通知信息发送给所述用户设备。
2、 如权利要求 1所述的方法, 还包括:
所述用户设备接收所述系统消息, 从中获取所述更新后小区中使用的 MCCH条数, 并从所述事先设定的 MCCH条数与 DCI格式的对应关系中, 查找与所获取的所述更新后小区中使用的 MCCH条数对应的 DCI格式,釆用 所查找到的 DCI格式检测及接收所述 MBMS通知信息。
3、 如权利要求 1或 2所述的方法, 其中,
所述 MCCH条数与 DCI格式的对应关系中, MCCH条数与所述 MCCH 条数对应的 DCI格式所占用的比特数成正比。
4、 如权利要求 1或 2所述的方法, 其中,
所述 MCCH条数与 DCI格式的对应关系中包括新增 DCI格式。
5、 如权利要求 1或 2所述的方法, 其中,
所述 MCCH条数与 DCI格式的对应关系中, MCCH条数不同时, 对应 的 DCI格式相同或不同。
6、 一种传输多媒体广播和组播业务 MBMS通知信息的系统, 包括网络 侧设备和用户设备, 其中:
所述网络侧设备设置为在当前小区中使用的 MBMS 点到多点控制信道 MCCH条数发生更新时, 向所述用户设备发送系统消息, 所述系统消息中包 括更新后小区中使用的 MCCH条数, 以及从事先设定的 MCCH条数与下行 控制信息 DCI格式的对应关系中,查找与所述更新后小区中使用的 MCCH条 数对应的 DCI格式, 釆用所查找到的 DCI格式承载 MBMS通知信息, 将所 述 MBMS通知信息发送给所述用户设备;
所述用户设备设置为接收所述系统消息, 从中获取所述更新后小区中使 用的 MCCH条数, 并从所述事先设定的 MCCH条数与 DCI格式的对应关系 中,查找与所获取的小区中使用的 MCCH条数对应的 DCI格式,釆用所查找 到的 DCI格式检测及接收所述 MBMS通知信息。
7、 如权利要求 6所述的系统, 其中,
所述 MCCH条数与 DCI格式的对应关系中, MCCH条数与所述 MCCH 条数对应的 DCI格式所占用的比特数成正比。
8、 如权利要求 6所述的系统, 其中,
所述 MCCH条数与 DCI格式的对应关系中包括新增 DCI格式。
9、 如权利要求 6所述的系统, 其中,
所述 MCCH条数与 DCI格式的对应关系中, MCCH条数不同时, 对应 的 DCI格式相同或不同。
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