WO2009111988A1 - 单频网多播广播帧的配置和指示方法及终端获知方法 - Google Patents

单频网多播广播帧的配置和指示方法及终端获知方法 Download PDF

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Publication number
WO2009111988A1
WO2009111988A1 PCT/CN2009/070763 CN2009070763W WO2009111988A1 WO 2009111988 A1 WO2009111988 A1 WO 2009111988A1 CN 2009070763 W CN2009070763 W CN 2009070763W WO 2009111988 A1 WO2009111988 A1 WO 2009111988A1
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Prior art keywords
frame
frequency network
mbsfn
multicast broadcast
network multicast
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PCT/CN2009/070763
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English (en)
French (fr)
Inventor
马子江
马志锋
喻斌
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中兴通讯股份有限公司
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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 KR1020107022892A priority Critical patent/KR101102866B1/ko
Priority to US12/937,275 priority patent/US8279791B2/en
Priority to EP09720741.9A priority patent/EP2254387B1/en
Publication of WO2009111988A1 publication Critical patent/WO2009111988A1/zh

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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
    • 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
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • 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

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a method, an indication method, and a terminal learning method for configuring a single-frequency network broadcast (MBSFN) frame in a LTE (Long Term Evolution) system.
  • MMSFN single-frequency network broadcast
  • 3GPP 3rd Generation Partnership Project
  • LTE Research Working Group 3rd Generation Partnership Project
  • 3.9G improved 3G next-generation network for the evolution of third-generation mobile communication technologies.
  • the overall goals include: a simple system structure, higher transmission rates, low overall cost, good economic backward compatibility, flexible frequency usage, and flexible business support.
  • 3GPP proposes Multimedia Broadcast Multicast Service (MBMS), which provides a point-to-multipoint service in which data sources send data to multiple users in a mobile network to implement network resources. Sharing, improve the utilization of network resources, especially valuable air interface resources.
  • MBMS service is a technology for sharing network resources to transfer data from one data source to multiple targets.
  • the MBMS defined by 3GPP can not only realize plain text low-rate message class multicast and broadcast, but also realize high-speed multimedia service multicast. And broadcast, offering a wide variety of rich video, audio and multimedia services.
  • the MBMS technology is called E-MBMS (Evolved MBMS, Improved Multimedia Broadcast Multicast Service).
  • radio frames are divided into MBSFN frames (grid-filled radio frames in the figure).
  • Non-MBSFN frames are non-MBSFN frames, that is, unicast frames (blank-filled radio frames in the figure); some sub-frames in MBSFN frames are transmitted in MBSFN mode, that is, sub-frames in each MBSFN frame are further divided into MBSFN subframes (slash-filled subframes in the figure) and non-MBSFN subframes, that is, unicast subframes (point-filled subframes in the figure), and all subframes in the non-MBSFN frame do not use the MBSFN transmission mode.
  • one carrier frequency can support one or more MCHs (MBMS transport CHannel), and the physical resources allocated by the specific MCH can use a specific subframe mode ( Pattern of subframes ) , this sub-frame mode is called MCH Subframe Allocation Pattern ( MSAP , MCH Subframe Allocation Pattern ).
  • MCH Subframe Allocation Pattern MSAP , MCH Subframe Allocation Pattern
  • Multiple MBMS services can be mapped to the same MCH.
  • the same MCH includes several MBMS services belonging to the same MBSFN area.
  • the signal estimation cannot use the ordinary cell-specific reference signal, but the reference signal inserted in the MBSFN subframe, which uses the MBSFN transmission mode. That is, all the cells participating in the MBSFN mode use the same reference signal, which is called the MBSFN reference signal.
  • the MBSFN subframe uses the MBSFN reference signal.
  • the mobile terminal In an LTE network, whether it is FDD or TDD, the mobile terminal needs to know whether each radio frame is an MBSFN frame, and also needs to know whether each subframe in each MBSFN frame uses MBSFN, that is, the UE needs to know each subframe. It is an MBSFN subframe or a non-MBSFN subframe, so that the mobile terminal uses the MBSFN reference signal or the cell-specific reference signal for channel estimation on each subframe.
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • the mobile terminal needs to notify the mobile terminal of the above information of each radio frame and subframe by using a system broadcast message, and the mobile terminal also needs It is known whether each radio frame is an MBSFN frame, and whether each subframe is an MBSFN subframe to perform channel estimation for each subframe.
  • the prior art has not been able to provide a configuration method for a single frequency network multicast broadcast frame that can save system resources.
  • the technical problem to be solved by the present invention is to provide a configuration and indication method for a single frequency network multicast broadcast frame and a terminal learning method, thereby saving system radio resources.
  • a bit map When configuring a single-frequency network multicast broadcast frame, if a bit map is used, a bit (bit) bit is used to indicate whether a radio frame is an MBSFN frame or a non-MBSFN frame, if a system message broadcast period includes M Radio frames, then you need to use M bits to represent MBSFN In the case of frame configuration, this requires occupying more bytes in the system message and wasting system resources.
  • the present invention provides a method for configuring a single frequency network multicast broadcast radio frame, which is applied to a long term evolution system, wherein the access network sends a configuration parameter of a single frequency network multicast broadcast frame to a mobile terminal, The mobile terminal determines, according to the configuration parameter, whether the received radio frame is a single frequency network multicast broadcast frame, and the configuration parameter includes a repetition period of the single frequency network multicast broadcast frame distributed within the system set time.
  • the above method further includes the following features:
  • the configuration parameter further includes an offset value; when the mobile terminal determines whether the received radio frame is a single frequency network multicast broadcast frame, the radio frame number of the radio frame in a system information broadcast period is as described above. If the remainder obtained by the repetition period of the repetition period of the single-frequency network multicast broadcast frame is the offset value, the radio frame is considered to be a single-frequency network multicast broadcast frame, otherwise, the radio frame is not considered to be a single-frequency network multicast broadcast frame.
  • the above method further includes the following features:
  • the repetition period included in the configuration parameter refers to a period in which a single frequency network multicast broadcast frame is distributed in a system information broadcast period; if the mobile terminal determines whether the received radio frame is a single frequency network multicast broadcast frame, If the radio frame number of the radio frame in a system information broadcast period is modulo according to the repetition period of the single-frequency network multicast broadcast frame, the remainder is 0, and the radio frame is considered to be a single-frequency network multicast broadcast frame; otherwise It is considered that the radio frame is not a single frequency network multicast broadcast frame.
  • the above method further includes the following features:
  • the configuration parameter further includes a number of consecutive distributions; when the mobile terminal determines whether the received radio frame is a single frequency network multicast broadcast frame, if the radio frame number of the radio frame in a system information broadcast period is as described above
  • the remainder of the repetition period modulo of the single-frequency network multicast broadcast frame is any value from 0 to the number of consecutive distributions of the single-frequency network multicast broadcast frame, and the radio frame is considered to be a single-frequency network multicast. Broadcast frame; otherwise, the radio frame is considered not to be a single frequency network multicast broadcast frame.
  • the above method further includes the following features:
  • the configuration parameter further includes a continuous distribution number and an offset value of the single frequency network multicast broadcast frame; when the mobile terminal determines whether the received wireless frame is a single frequency network multicast broadcast frame, the wireless frame is in a system.
  • the radio frame number in the information broadcast period is obtained according to the repetition period of the single frequency network multicast broadcast frame.
  • the remainder is the sum of any one of the consecutively distributed numbers of the single-frequency network multicast broadcast frames and the offset value, and the radio frame is considered to be a single-frequency network multicast broadcast frame. Otherwise, The radio frame is considered not to be a single frequency network multicast broadcast frame.
  • the above method further includes the following features:
  • the configuration parameter includes a single-frequency network multicast broadcast subframe configuration parameter, where the single-frequency network multicast broadcast subframe configuration parameter occupies M bits, and each bit corresponds to a single-frequency network multicast broadcast frame. Whether the frame is a single frequency network multicast broadcast subframe, and M is the number of subframes in a single frequency network multicast broadcast frame.
  • the above method further includes the following features:
  • the repetition period, the number of consecutive distributions, and the number of bits occupied by the offset value of the single-frequency network multicast broadcast frame are all values of log ⁇ , where K is the number of radio frames included in a system information broadcast period, K The value is an integer power of 2.
  • the present invention further provides a method for indicating a single frequency network multicast broadcast frame, including: the access network uses a repeating period and an offset of a single frequency network multicast broadcast frame, that is, an MBSFN frame, as an indication wireless. Whether the frame is a configuration parameter of the MBSFN frame; when the access network sends a configuration parameter to the mobile terminal to indicate whether the radio frame is an MBSFN frame, the repetition period is used as a mandatory parameter, and the offset is used as an optional parameter, and the The incoming network sends the optional parameter when the value of the optional parameter is not zero.
  • the above method further includes the following features:
  • the repetition period is less than or equal to the system information broadcast period, and the configuration parameters of the repetition period and the offset are represented by log ⁇ bits, where f is the number of radio frames included in a system information broadcast period.
  • the above method further includes the following features:
  • the access network uses a repetition period and an offset of a single frequency network multicast broadcast frame, that is, an MBSFN frame, as a configuration parameter indicating whether the radio frame is an MBSFN frame, and transmits, to the mobile terminal, whether the radio frame is an MBSFN frame.
  • a single frequency network multicast broadcast frame that is, an MBSFN frame
  • the repetition period is used as a mandatory parameter
  • the offset is used as an optional parameter.
  • the access network sends the optional parameter when the optional parameter is not 0.
  • the above method further includes the following features:
  • the repetition period is less than or equal to the system information broadcast period, and the configuration parameters of the repetition period and the offset are represented by log ⁇ bits, where f is the number of radio frames included in a system information broadcast period.
  • MBSFN_offset is 0; SFN is the sequence number of the radio frame, and mod represents the modulo operation.
  • the present invention further provides a system for indicating a single frequency network multicast broadcast frame, the system comprising a mobile terminal, wherein the access network of the system comprises a single frequency network multicast broadcast frame indication module
  • the mobile terminal includes a signal receiving module and a single frequency network multicast broadcast frame determining module, and the single frequency network multicast broadcast frame indicating module is configured to use a single frequency network multicast broadcast frame, that is, a repetition period and a bias of the MBSFN frame.
  • the shift amount is moved as a configuration parameter indicating whether the radio frame is an MBSFN frame.
  • the terminal sends; the repetition period is used as a mandatory parameter, and the offset is used as an optional parameter, and the optional parameter is sent when the value of the optional parameter is not 0;
  • the signal receiving module is configured to receive a configuration parameter sent by the network to indicate whether the radio frame is a single frequency network multicast broadcast frame, that is, an MBSFN frame;
  • the configuration parameter includes a value of the repetition period MBSFN_rep and an offset value of MBSFN_offset, or only includes The value of the repetition period MBSFN_rep;
  • the configuration of the single frequency network multicast broadcast subframe can be completed by occupying less bytes in the system message, thereby saving system resources.
  • FIG. 1 is a schematic diagram of a configuration of an MBSFN frame in an embodiment
  • FIG. 2 is a schematic diagram of a method for configuring a single frequency network multicast broadcast radio frame in an embodiment.
  • a method for configuring a single frequency network multicast broadcast radio frame includes the following steps:
  • Step 201 The system information sent by the modified universal terrestrial radio access network (E-UTRAN) carries configuration parameters of the MBSFN frame; the configuration parameter includes a repetition period of the single-frequency network multicast broadcast frame distributed within the system set time;
  • E-UTRAN modified universal terrestrial radio access network
  • the configuration parameter used to indicate the single-frequency network multicast broadcast frame is one of the following configuration modes:
  • the configuration parameters include: a repetition period, wherein the number of bits occupied by the repetition period is log ⁇ when the value of log ⁇ is an integer;
  • Configuration parameters include: repetition period, number of consecutive distributions, wherein the number of bits occupied by the repetition period and the number of consecutive distributions are log ⁇ ; (offset refers to the first MBSFN frame and the first wireless in the repetition period) The offset of the frame, the number of consecutive distributions also refers to the continuity of the MBSFN frame in the repetition period. Number of distributions)
  • the configuration parameters include: a repetition period, an offset value, wherein the number of bits occupied by the repetition period and the offset value is log ⁇ ;
  • the configuration parameters include: a repetition period, a continuous distribution number, and an offset value, wherein the repetition period, the number of consecutive distributions, and the number of bits occupied by the offset value are log ⁇ ;
  • K is the number of radio frames included in a system information broadcast period, and the value of K is 8, 16, 32, etc., which is an integer power of 2, and the repetition period is less than or equal to the system information broadcast period.
  • Each MBSFN frame includes a plurality of MBSFN subframes, and the MBSFN subframe configuration in each MBSFN frame is the same.
  • the MBSFN subframe configuration may use a bit map manner, and one bit indicates that one subframe is MBSFN subframe or non-MBSFN subframe.
  • the configuration parameter indicating the single-frequency network multicast broadcast subframe may also be included, and the single-frequency network multicast broadcast subframe configuration parameter occupies M bits (M is one The number of subframes in a single frequency network multicast broadcast frame), each bit corresponding to whether one subframe in a single frequency network multicast broadcast frame is a single frequency network multicast broadcast subframe.
  • M is one The number of subframes in a single frequency network multicast broadcast frame
  • the repetition period of the MBSFN frame can be the same as the system information broadcast period or other system-set values.
  • the message carrying the above configuration parameters in the system information may be: System Information Message 1 (SI-1, System Information message 1), System Information Message 2 (SI-2, System Information message 2), System Information Message 3 ( SI-3, System Information message 3).
  • SI-1 System Information message 1
  • SI-2 System Information message 2
  • SI-3 System Information message 3
  • Step 202 The mobile terminal determines whether the received current radio frame is an MBSFN frame according to the configuration information of the MBSFN frame in the system information.
  • the mobile terminal determines that the current radio frame is an MBSFN frame, and does not satisfy the following formula, the UE determines that the current radio frame is a non-MBSFN frame:
  • MBSFN— rep MBSFN—offset + (any value from 0 to MBSFN—length-1) where: MBSFN—rep is the repetition period of the MBSFN frame in the configuration information;
  • MBSFN_offset is the offset value of the MBSFN frame in the configuration information
  • MBSFN_length is the number of consecutively distributed MBSFN frames in the configuration information
  • SFN is a radio frame number
  • Mod represents the remainder of SFN modulo by MBSFN-rep
  • the default continuous distribution number MBSFN_length and the offset value MBSFN_offset are 0; that is, the equation (1) is:
  • the mobile terminal determines whether the received radio frame is a single frequency network multicast broadcast frame, if the radio frame number of the radio frame in a system information broadcast period is modulo according to the repetition period of the single frequency network multicast broadcast frame If the obtained remainder is 0, the radio frame is considered to be a single frequency network multicast broadcast frame; otherwise, the radio frame is considered not to be a single frequency network multicast broadcast frame.
  • the default offset value MBSFN_offset is 0; that is, the equation (1) is:
  • SFN mod MBSFN— rep (any value from 0 to MBSFN—length-1);
  • the mobile terminal determines whether the received radio frame is a single frequency network multicast broadcast frame, if the radio frame number of the radio frame in a system information broadcast period is modulo according to the repetition period of the single frequency network multicast broadcast frame The obtained remainder is any value from 0 to the number of consecutive distributions of the single frequency network multicast broadcast frame, and the radio frame is considered to be a single frequency network multicast broadcast frame; otherwise, the radio frame is considered to be not a single frequency Network multicast broadcast frames.
  • the default continuous distribution number MBSFN_length is 0; that is, the formula (1) is:
  • the radio frame number of the radio frame in a system information broadcast period is determined according to the repetition period of the single frequency network multicast broadcast frame. If the remainder obtained by the modulo is the offset value, the radio frame is considered to be a single-frequency network multicast broadcast frame. Otherwise, the radio frame is considered to be not a single-frequency network multicast broadcast frame.
  • the radio frame is The remainder of the radio frame number in a system information broadcast period modulo according to the repetition period of the single-frequency network multicast broadcast frame is any from 0 to the number of consecutive distributions of the single-frequency network multicast broadcast frame A sum of the value and the offset value is considered to be a single frequency network multicast broadcast frame. Otherwise, the radio frame is considered to be not a single frequency network multicast broadcast frame.
  • the configuration parameters include a repetition period (the maximum value of the repetition period is 32) and an offset value, and the two parameters are represented by 5 (log 3 ) bits, respectively. (Because the repetition period and the maximum value of the offset value are both 32, 5 bits are enough to represent), as shown in the following table:
  • the SFN number of the MBSFN frame is: 2, 7, 12, 17, 22, 27.
  • the configuration parameters include the repetition period (the maximum value of the repetition period is 32), the number of consecutive distributions, and the offset value. These three parameters are respectively 5 (log). 3 ) Bit representation (since the repetition period, the number of consecutive distributions, and the maximum value of the offset value are both 32, 5 bits are sufficient), as shown in the following table:
  • the repetition period (MBSFN_rep) is 5
  • the number of consecutive distributions (MBSFNJength) is 3
  • the offset value (MBSFN_offset) is 2
  • the SFN numbers of the MBSFN frames are: 2, 3, 4, 7, 8, 9, 12, 13, 14, 17, 18, 19, 22, 23, 24, 27, 28, 29.
  • the configuration parameter includes only the repetition period, only one bit is required to configure a multicast broadcast radio frame in one repetition period.
  • a multicast broadcast radio frame in the system information broadcast period can be configured in only 10 bits, and the configuration parameters include the repetition period, the number of consecutive distributions, and
  • the offset value is used, only one bit can be configured to configure a multicast broadcast radio frame in the system information broadcast period, and less bits can be used to express the distribution of MBSFN frames and non-MBSFN frames in a system information broadcast period, saving System resources.
  • the access network comprises a single frequency network multicast broadcast frame indication module, which is used for repeating the period and offset of the single frequency network multicast broadcast frame, that is, the MBSFN frame.
  • the mobile terminal corresponding to the above method includes a signal receiving module and a single frequency network multicast broadcast frame judging module.
  • a signal receiving module configured to receive, by the access network, a configuration parameter that is used to indicate whether the radio frame is a single-frequency network multicast broadcast frame, that is, an MBSFN frame; and the configuration parameter includes a value of a repetition period, MBSFN_rep, and an offset value. Value MBSFN_offset, or only the value of the repetition period MBSFN_rep;
  • the configuration of the single frequency network multicast broadcast subframe can be completed by occupying less bytes in the system message, thereby saving system resources.

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

Description

单频网多播广播帧的配置和指示方法及终端获知方法
技术领域
本发明涉及无线通讯领域， 尤其涉及在 LTE ( Long Term Evolution, 长期 演进） 系统中配置单频网多播广播（ MBSFN, Multicast/Broadcast over Single Frequency Network ) 帧的方法和指示方法及终端获知方法。
背景技术
2005年， 3GPP ( 3rd Generation Partnership Project,第三代合作伙伴计划） 启动了 LTE研究工作组， 研究和设计第三代移动通信技术演进的 3.9G (改进 的 3G )的下一代网络， 其设计的总体目标包括： 简洁的系统结构、 更高的传 输速率、 低廉的综合成本、 经济良好的后向兼容、 灵活的频语使用方法、 灵 活的业务支撑能力。
为了有效地利用移动网络资源， 3GPP提出了多媒体广播和组播业务 ( MBMS , Multimedia Broadcast Multicast Service ) , 在移动网络中提供一个 数据源向多个用户发送数据的点到多点业务， 实现网络资源共享， 提高网络 资源的利用率， 尤其是宝贵的空口接口资源。 MBMS业务是一种共享网络资 源从一个数据源向多个目标传送数据的技术， 3GPP定义的 MBMS不仅能实 现纯文本低速率的消息类组播和广播， 而且还能实现高速多媒体业务的组播 和广播， 提供多种丰富的视频、 音频和多媒体业务。 在 LTE网络中， MBMS 技术称为 E-MBMS ( Evolved MBMS, 改进的多媒体广播组播业务） 。
如图 1所示，在 LTE FDD ( Frequency Division Duplex,频分双工）和 LTE TDD ( Time Division Duplex, 时分双工 )中，无线帧被划分为 MBSFN帧（图 中网格状填充的无线帧 。None-MBSFN帧即非 MBSFN帧也就是单播帧（图 中空白填充的无线帧） ； MBSFN 帧中的部分子帧釆用 MBSFN发射方式， 即每个 MBSFN帧中的子帧又被划分为 MBSFN子帧（图中斜线填充的子帧） 和非 MBSFN子帧即单播子帧（图中点状填充的子帧）， 而非 MBSFN帧中所 有子帧都不釆用 MBSFN发射方式而釆用单播发射方式。 为了提高 E-MBMS的资源利用效率 ,一个载波频率可以支持一个或多个 MCH ( MBMS transport CHannel, MBMS传输信道）， 此时这个特定的 MCH 所分配的物理资源可以釆用特定的子帧模式（ pattern of subframes ) , 这种子 帧模式称作 MCH子帧分配模式（ MSAP , MCH Subframe Allocation Pattern )。 多个 MBMS业务可以映射到相同的 MCH上， 这个相同的 MCH包括的若干 个 MBMS业务属于相同的 MBSFN区域。
在 MBSFN发射方式下， 信号估计不能釆用普通的小区特有的参考信号 ( Cell-specific reference signal ) ,而是釆用插入在 MBSFN子帧中的参考信号， 该参考信道釆用 MBSFN的发射方式，也就是所有参与了 MBSFN方式的小区 都釆用完全相同的参考信号， 称之为 MBSFN参考信号 （MBSFN reference signal ) ； 在无线帧中， MBSFN子帧釆用 MBSFN参考信号。
在 LTE网络中， 无论是 FDD还是 TDD, 移动终端都需要知道每个无线 帧是不是 MBSFN帧， 还需要知道每个 MBSFN帧中的每个子帧是否釆用了 MBSFN, 即 UE需要知道每个子帧是 MBSFN子帧或非 MBSFN子帧， 以便 移动终端在每个子帧上釆用 MBSFN参考信号或小区特有的参考信号进行信 道估计。 因此， 改进的通用陆地无线接入网络（Evolved UTRAN, Evolved Universal Terrestrial Radio Access Network, 简称 E-UTRAN )需要通过系统广 播消息将每个无线帧和子帧的上述信息通知给移动终端， 移动终端也需要知 道每个无线帧是否是 MBSFN帧、 每个子帧是否是 MBSFN子帧以进行每个 子帧的信道估计。
现有技术中尚未能提供可以节约系统资源的单频网多播广播帧的配置方 法。
发明内容
本发明要解决的技术问题是提供一种单频网多播广播帧的配置和指示方 法及终端获知方法， 节省系统无线资源。
配置单频网多播广播帧时， 如果釆用位元映射（bitmap ) 的方式即用一 个 bit (比特）位表示一个无线帧是 MBSFN帧或非 MBSFN帧， 如果一个系 统消息广播周期内包括 M个无线帧， 那就需要用 M个比特位来表示 MBSFN 帧配置情况， 这样需要占用系统消息中较多的字节， 浪费系统资源。
为了解决上述技术问题， 本发明提供了一种配置单频网多播广播无线帧 的方法， 应用于长期演进系统， 其中， 接入网络向移动终端发送单频网多播 广播帧的配置参数， 所述移动终端根据此配置参数， 判断收到的无线帧是否 是单频网多播广播帧， 所述配置参数中包括单频网多播广播帧在系统设定时 间内分布的重复周期。
进一步地， 上述方法还包括以下特点：
所述配置参数中还包括偏移值； 所述移动终端在判断收到的无线帧是否 是单频网多播广播帧时， 该无线帧在一个系统信息广播周期中的无线帧序号 按所述单频网多播广播帧的重复周期取模得到的余数是所述偏移值， 则认为 该无线帧是单频网多播广播帧， 否则， 认为该无线帧不是单频网多播广播帧。
进一步地， 上述方法还包括以下特点：
所述配置参数中包括的重复周期是指单频网多播广播帧在一个系统信息 广播周期内分布的周期； 移动终端在判断收到的无线帧是否是单频网多播广 播帧时， 如果该无线帧在一个系统信息广播周期中的无线帧序号按所述单频 网多播广播帧的重复周期取模得到的余数是 0, 则认为该无线帧是单频网多 播广播帧； 否则， 认为该无线帧不是单频网多播广播帧。
进一步地， 上述方法还包括以下特点：
所述配置参数中还包括连续分布个数； 移动终端在判断收到的无线帧是 否是单频网多播广播帧时， 如果该无线帧在一个系统信息广播周期中的无线 帧序号按所述单频网多播广播帧的重复周期取模得到的余数是从 0到所述单 频网多播广播帧的连续分布个数中的任一值， 则认为该无线帧是单频网多播 广播帧； 否则， 认为该无线帧不是单频网多播广播帧。
进一步地， 上述方法还包括以下特点：
所述配置参数中还包括单频网多播广播帧的连续分布个数和偏移值； 移 动终端在判断收到的无线帧是否是单频网多播广播帧时， 该无线帧在一个系 统信息广播周期中的无线帧序号按所述单频网多播广播帧的重复周期取模得 到的余数是从 0到所述单频网多播广播帧的连续分布个数中任何一值与所述 偏移值的和， 则认为该无线帧是单频网多播广播帧， 否则， 认为该无线帧不 是单频网多播广播帧。
进一步地， 上述方法还包括以下特点：
所述配置参数中包括单频网多播广播子帧配置参数， 所述单频网多播广 播子帧配置参数占用 M个比特，每个比特对应表示一个单频网多播广播帧中 一个子帧是否是单频网多播广播子帧， M是一个单频网多播广播帧中的子帧 个数。
进一步地， 上述方法还包括以下特点：
所述单频网多播广播帧的重复周期、 连续分布个数和偏移值占用的比特 数均为 log^的值， K为一个系统信息广播周期中包括的无线帧的个数， K的 值为 2的整数次方。
为了解决上述技术问题， 本发明还提供了一种单频网多播广播帧的指示 方法， 包括： 接入网络将单频网多播广播帧即 MBSFN帧的重复周期和偏移 量作为指示无线帧是否是 MBSFN帧的配置参数； 接入网络向移动终端发送 用于指示无线帧是否是 MBSFN帧的配置参数时， 将重复周期作为必选参数， 将偏移量作为可选参数， 所述接入网络在所述可选参数的值不为 0时才发送 所述可选参数。
进一步地， 上述方法还包括以下特点：
所述重复周期小于或等于系统信息广播周期， 所述重复周期和偏移量的 配置参数均用 log^个比特来表示， 其中 f为一个系统信息广播周期中包括的 无线帧的个数。
为了解决上述技术问题， 本发明还提供了一种移动终端获知单频网多播 广播帧的方法， 包括： 移动终端接收接入网络发送的用于指示无线帧是否是 单频网多播广播帧即 MBSFN 帧的配置参数， 将满足下式 SFN mod MBSFN— rep =MBSFN— offset的无线帧判定为 MBSFN帧； 其中， MBSFN— rep 为所述配置参数中的重复周期的值； MBSFN— offset为从所述配置参数中读取 的偏移值的值，或在所述配置参数中没有偏移量信息时， MBSFN— offset为 0; SFN为所述无线帧的序号， mod表示取模运算。
进一步地， 上述方法还包括以下特点：
所述接入网络将单频网多播广播帧即 MBSFN帧的重复周期和偏移量作 为指示无线帧是否是 MBSFN帧的配置参数， 在向移动终端发送用于指示无 线帧是否是 MBSFN帧的配置参数时， 将重复周期作为必选参数， 将偏移量 作为可选参数， 所述接入网络在所述可选参数在值不为 0时才发送所述可选 参数。
进一步地， 上述方法还包括以下特点：
所述重复周期小于或等于系统信息广播周期， 所述重复周期和偏移量的 配置参数均用 log^个比特来表示， 其中 f为一个系统信息广播周期中包括的 无线帧的个数。
为了解决上述技术问题， 本发明还提供了一种移动终端， 其中： 所述移 动终端包括信号接收模块和单频网多播广播帧判断模块，所述信号接收模块， 用于接收接入网络发送的用于指示无线帧是否是单频网多播广播帧即 MBSFN帧的配置参数； 所述配置参数包括重复周期的值 MBSFN— rep和偏移 值的值 MBSFN— offset, 或者只包括重复周期的值 MBSFN— rep; 所述单频网 多播广播帧判断模块， 用于将满足下式 SFN mod MBSFN— rep =MBSFN— offset 的无线帧判定为 MBSFN 帧； 所述配置参数中没有偏移量信息时， MBSFN— offset为 0; SFN为所述无线帧的序号， mod表示取模运算。
为了解决上述技术问题， 本发明还提供了一种指示单频网多播广播帧的 系统， 所述系统包括移动终端， 其中， 所述系统的接入网络包括单频网多播 广播帧指示模块， 所述移动终端包括信号接收模块和单频网多播广播帧判断 模块， 所述单频网多播广播帧指示模块，用于将单频网多播广播帧即 MBSFN 帧的重复周期和偏移量作为指示无线帧是否是 MBSFN帧的配置参数向移动 终端发送； 将重复周期作为必选参数， 将偏移量作为可选参数， 在所述可选 参数的值不为 0时才发送所述可选参数； 所述信号接收模块， 用于接收接入 网络发送的用于指示无线帧是否是单频网多播广播帧即 MBSFN帧的配置参 数； 所述配置参数包括重复周期的值 MBSFN— rep 和偏移值的值 MBSFN— offset, 或者只包括重复周期的值 MBSFN— rep; 所述单频网多播广播 帧判断模块，用于将满足下式 SFN mod MBSFN— rep =MBSFN— offset的无线帧 判定为 MBSFN帧； 所述配置参数中没有偏移量信息时， MBSFN— offset为 0; SFN为所述无线帧的序号， mod表示取模运算。
釆用本发明的方法， 可较少占用系统消息中的字节完成单频网多播广播 子帧的配置， 节省系统资源。 附图概述
图 1是实施例中 MBSFN帧的配置示意图；
图 2是实施例中配置单频网多播广播无线帧的方法示意图。
本发明的较佳实施方式
在长期演进系统的 FDD或 TDD系统中， 如图 2所示， 配置单频网多播 广播无线帧的方法， 包括以下步骤：
步骤 201 , 改进的通用陆地无线接入网络（ E-UTRAN )发送的系统信息 中携带 MBSFN 帧的配置参数； 配置参数中包括单频网多播广播帧在系统设 定时间内分布的重复周期；
用于表示单频网多播广播帧的配置参数是以下配置方式中的一种：
( 1 )配置参数包括： 重复周期， 其中重复周期占用的比特数在 log^的值 是整数时， 取值为 log^ ;
( 2 )配置参数包括： 重复周期， 连续分布个数， 其中重复周期和连续分 布个数占用的比特数均为 log^ ; (偏移量指重复周期中第一个 MBSFN帧与 第一个无线帧的偏移量， 连续分布个数也是指重复周期中 MBSFN帧的连续 分布个数）
( 3 )配置参数包括： 重复周期， 偏移值， 其中重复周期和偏移值占用的 比特数均为 log^ ;
( 4 )配置参数包括： 重复周期， 连续分布个数， 偏移值， 其中重复周期、 连续分布个数和偏移值占用的比特数均为 log^；
上述的 K为一个系统信息广播周期中包括的无线帧的个数， K的取值为 8, 16, 32等是 2的整数次方的值， 重复周期小于或等于系统信息广播周期。
每个 MBSFN 帧中包括若干个 MBSFN子帧， 在每个 MBSFN 帧内的 MBSFN子帧配置相同， MBSFN子帧配置可以釆用位元映射（bitmap )的方 式， 分别用 1比特表示一个子帧是 MBSFN子帧或非 MBSFN子帧。
除用于表示单频网多播广播帧的配置参数外， 还可以包括表示单频网多 播广播子帧的配置参数， 单频网多播广播子帧配置参数占用 M个比特（M是 一个单频网多播广播帧中的子帧个数） ， 每个比特对应表示一个单频网多播 广播帧中一个子帧是否是单频网多播广播子帧。 MBSFN 帧的重复周期可以 与系统信息广播周期相同或其它系统设定的值。
系统信息中携带上述配置参数的消息可以是： 系统信息的消息一（SI-1 , System Information message 1 ) , 系统信息的消息二 ( SI-2, System Information message 2 ) , 系统信息的消息三 ( SI-3 , System Information message 3 ) 。
步骤 202, 移动终端才艮据所述系统信息中 MBSFN 帧的配置信息， 判断 接收到的当前无线帧是否是 MBSFN帧。
判断的方式如下： 如果当前无线帧的 SFN序号满足下式， 则移动终端判 断当前无线帧是 MBSFN帧， 不满足如下公式， 则 UE判断当前无线帧是非 MBSFN帧：
SFN mod MBSFN— rep = MBSFN— offset + (0至 MBSFN— length- 1中任一值） 其中： MBSFN— rep 是配置信息中 MBSFN帧的重复周期；
MBSFN— offset 是配置信息中 MBSFN帧的偏移值； MBSFN— length 是配置信息中 MBSFN帧的连续分布个数； SFN为无线帧序号；
mod表示 SFN按 MBSFN— rep取模的余数；
如果按照第 ( 1 )种方式在配置参数中只包括重复周期时， 默认连续分布 个数 MBSFN— length和偏移值 MBSFN— offset为 0; 即式（ 1 )为：
SFN mod MB SFN— rep=0；
移动终端在判断收到的无线帧是否是单频网多播广播帧时， 如果该无线 帧在一个系统信息广播周期中的无线帧序号按所述单频网多播广播帧的重复 周期取模得到的余数是 0, 则认为该无线帧是单频网多播广播帧； 否则， 认 为该无线帧不是单频网多播广播帧。
如果按照第（2 )种方式在配置参数中只包括重复周期，连续分布个数时， 默认偏移值 MBSFN_offset为 0; 即式（ 1 )为：
SFN mod MBSFN— rep= (0至 MBSFN— length- 1中任一值)；
移动终端在判断收到的无线帧是否是单频网多播广播帧时， 如果该无线 帧在一个系统信息广播周期中的无线帧序号按所述单频网多播广播帧的重复 周期取模得到的余数是从 0到所述单频网多播广播帧的连续分布个数中的任 一值， 则认为该无线帧是单频网多播广播帧； 否则， 认为该无线帧不是单频 网多播广播帧。
如果按照第（3 )种方式在配置参数中只包括重复周期， 偏移值时， 默认 连续分布个数 MBSFN— length为 0; 即式（ 1 )为：
SFN mod MBSFN— rep = MBSFN— offset;
所述移动终端在判断收到的无线帧是否是单频网多播广播帧时， 该无线 帧在一个系统信息广播周期中的无线帧序号按所述单频网多播广播帧的重复 周期取模得到的余数是所述偏移值， 则认为该无线帧是单频网多播广播帧， 否则， 认为该无线帧不是单频网多播广播帧。
如果按照第 ( 4 )种方式在配置参数中包括重复周期， 连续分布个数和偏 移值时， 移动终端在判断收到的无线帧是否是单频网多播广播帧时， 该无线 帧在一个系统信息广播周期中的无线帧序号按所述单频网多播广播帧的重复 周期取模得到的余数是从 0到所述单频网多播广播帧的连续分布个数中任何 一值与所述偏移值的和， 则认为该无线帧是单频网多播广播帧， 否则， 认为 该无线帧不是单频网多播广播帧。
应用示例 1:
一个系统信息广播周期中包括的无线帧的个数为 32时，配置参数包括重 复周期 （重复周期的最大值为 32)和偏移值， 此二个参数分别用 5 ( log3 ) 个比特表示（因为重复周期、 偏移值的最大值均为 32, 用 5个比特就足以表 示了） ， 口下表所示：
Figure imgf000011_0001
如果， 重复周期 （MBSFN_rep)为 5, 偏移值（ MBSFN_offset )为 2, 那么， 在一个系统信息广播周期的无线帧序列中， 根据公式（1 ) , MBSFN 帧的 SFN序号为： 2, 7, 12, 17, 22, 27。
应用示例 2:
一个系统信息广播周期中包括的无线帧的个数为 32时，配置参数包括重 复周期（重复周期的最大值为 32) 、 连续分布个数和偏移值， 此三个参数分 别用 5 ( log3 )个比特表示（因为重复周期、 连续分布个数和偏移值的最大值 均为 32, 用 5个比特就足以表示了） ， 如下表所示：
Figure imgf000011_0002
如果， 重复周期 （MBSFN_rep)为 5, 连续分布个数 ( MBSFNJength ) 为 3, 偏移值（MBSFN— offset)为 2, 那么， 在一个系统信息广播周期的无线 帧序列中， 根据公式（1 ) , MBSFN帧的 SFN序号为： 2, 3, 4, 7, 8, 9, 12, 13, 14, 17, 18, 19, 22, 23, 24, 27, 28, 29。 如上所述，在一个系统信息广播周期中包括的无线帧的个数为 32的情况 下， 配置参数只包括重复周期时， 只需要 5 bit就可以配置一个重复周期内的 多播广播无线帧， 包括重复周期和连续分布个数时或者只包括重复周期和偏 移值时， 只需 lObit就可以配置一个系统信息广播周期内的多播广播无线帧， 配置参数包括重复周期、连续分布个数和偏移值时， 只需 15bit就可以配置一 个系统信息广播周期内的多播广播无线帧， 使用较少的比特即可表达出 MBSFN帧和非 MBSFN帧在一个系统信息广播周期的分布情况，节省了系统 资源。
对应于上述方法的指示单频网多播广播帧的系统， 接入网络包括单频网 多播广播帧指示模块， 用于将单频网多播广播帧即 MBSFN帧的重复周期和 偏移量作为指示无线帧是否是 MBSFN帧的配置参数向移动终端发送； 将重 复周期作为必选参数， 将偏移量作为可选参数， 在所述可选参数的值不为 0 时才发送所述可选参数。
对应于上述方法的移动终端包括信号接收模块和单频网多播广播帧判断 模块。
信号接收模块， 用于接收接入网络发送的用于指示无线帧是否是单频网 多播广播帧即 MBSFN 帧的配置参数； 所述配置参数包括重复周期的值 MBSFN— rep 和偏移值的值 MBSFN— offset , 或者只包括重复周期的值 MBSFN— rep;
单频网多播广播帧判断模块， 用于将满足下式 SFN mod MBSFN— rep =MBSFN— offset的无线帧判定为 MBSFN帧； 所述配置参数中没有偏移量信 息时， MBSFN— offset为 0; SFN为所述无线帧的序号， mod表示取模运算。
本发明还可有其他多种实施例，在不背离本发明精神及其实质的情况下 , 应的改变和变形都应属于本发明所附的权利要求的保护范围。
工业实用性
采用本发明的方法， 可较少占用系统消息中的字节完成单频网多播广播 子帧的配置， 节省系统资源。

Claims

权 利 要 求 书
1、 一种配置单频网多播广播无线帧的方法， 应用于长期演进系统， 其 中
接入网络向移动终端发送单频网多播广播帧的配置参数， 所述移动终端 根据此配置参数， 判断收到的无线帧是否是单频网多播广播帧， 所述配置参 数中包括单频网多播广播帧在系统设定时间内分布的重复周期。
2、 如权利要求 1所述的方法， 其中，
所述配置参数中还包括偏移值；
所述移动终端在判断收到的无线帧是否是单频网多播广播帧时， 该无线 帧在一个系统信息广播周期中的无线帧序号按所述单频网多播广播帧的重复 周期取模得到的余数是所述偏移值， 则认为该无线帧是单频网多播广播帧， 否则， 认为该无线帧不是单频网多播广播帧。
3、 如权利要求 1所述的方法， 其中，
所述配置参数中包括的重复周期是指单频网多播广播帧在一个系统信息 广播周期内分布的周期；
移动终端在判断收到的无线帧是否是单频网多播广播帧时， 如果该无线 帧在一个系统信息广播周期中的无线帧序号按所述单频网多播广播帧的重复 周期取模得到的余数是 0 , 则认为该无线帧是单频网多播广播帧； 否则， 认 为该无线帧不是单频网多播广播帧。
4、 如权利要求 1所述的方法， 其中，
所述配置参数中还包括连续分布个数；
移动终端在判断收到的无线帧是否是单频网多播广播帧时， 如果该无线 帧在一个系统信息广播周期中的无线帧序号按所述单频网多播广播帧的重复 周期取模得到的余数是从 0到所述单频网多播广播帧的连续分布个数中的任 一值， 则认为该无线帧是单频网多播广播帧； 否则， 认为该无线帧不是单频 网多播广播帧。
5、 如权利要求 1 所述的方法， 其中， 所述配置参数中还包括单频网多 播广播帧的连续分布个数和偏移值；
移动终端在判断收到的无线帧是否是单频网多播广播帧时， 该无线帧在 一个系统信息广播周期中的无线帧序号按所述单频网多播广播帧的重复周期 取模得到的余数是从 0到所述单频网多播广播帧的连续分布个数中任何一值 与所述偏移值的和， 则认为该无线帧是单频网多播广播帧， 否则， 认为该无 线帧不是单频网多播广播帧。
6、 如权利要求 1至 5中任一权利要求中所述的方法， 其中，
所述配置参数中包括单频网多播广播子帧配置参数， 所述单频网多播广 播子帧配置参数占用 M个比特，每个比特对应表示一个单频网多播广播帧中 一个子帧是否是单频网多播广播子帧， M是一个单频网多播广播帧中的子帧 个数。
7、 如权利要求 5所述的方法， 其中，
所述单频网多播广播帧的重复周期、 连续分布个数和偏移值占用的比特 数均为 log^的值， K为一个系统信息广播周期中包括的无线帧的个数， K的 值为 2的整数次方。
8、 一种单频网多播广播帧的指示方法， 包括：
接入网络将单频网多播广播帧即 MBSFN帧的重复周期和偏移量作为指 示无线帧是否是 MBSFN帧的配置参数；
接入网络向移动终端发送用于指示无线帧是否是 MBSFN帧的配置参数 时， 将重复周期作为必选参数， 将偏移量作为可选参数， 所述接入网络在所 述可选参数的值不为 0时才发送所述可选参数。
9、 如权利要求 8所述的指示方法， 其中：
所述重复周期小于或等于系统信息广播周期， 所述重复周期和偏移量的 配置参数均用 log^个比特来表示， 其中 f为一个系统信息广播周期中包括的 无线帧的个数。
10、 一种移动终端获知单频网多播广播帧的方法， 包括：
移动终端接收接入网络发送的用于指示无线帧是否是单频网多播广播帧 即 MBSFN帧的配置参数， 将满足下式 SFN mod MBSFN rep =MBSFN— offset 的无线帧判定为 MBSFN帧；
其中， MBSFN— rep 为所述配置参数中的重复周期的值； MBSFN— offset 为从所述配置参数中读取的偏移值的值， 或在所述配置参数中没有偏移量信 息时， MBSFN— offset为 0; SFN为所述无线帧的序号， mod表示取模运算。
11、 如权利要求 10所述的方法， 其中：
所述接入网络将单频网多播广播帧即 MBSFN帧的重复周期和偏移量作 为指示无线帧是否是 MBSFN帧的配置参数， 在向移动终端发送用于指示无 线帧是否是 MBSFN帧的配置参数时， 将重复周期作为必选参数， 将偏移量 作为可选参数， 所述接入网络在所述可选参数在值不为 0时才发送所述可选 参数。
12、 如权利要求 10所述的方法， 其中：
所述重复周期小于或等于系统信息广播周期， 所述重复周期和偏移量的 配置参数均用 log^个比特来表示， 其中 f为一个系统信息广播周期中包括的 无线帧的个数。
13、 一种移动终端，其中： 所述移动终端包括信号接收模块和单频网多 播广播帧判断模块，
所述信号接收模块， 用于接收接入网络发送的用于指示无线帧是否是单 频网多播广播帧即 MBSFN帧的配置参数； 所述配置参数包括重复周期的值 MBSFN— rep 和偏移值的值 MBSFN— offset , 或者只包括重复周期的值 MBSFN rep;
所述单频网多播广播帧判断模块，用于将满足下式 SFN mod MBSFN— rep =MBSFN— offset的无线帧判定为 MBSFN帧； 所述配置参数中没有偏移量信 息时， MBSFN— offset为 0; SFN为所述无线帧的序号， mod表示取模运算。
14、 一种指示单频网多播广播帧的系统，所述系统包括移动终端，其中， 所述系统的接入网络包括单频网多播广播帧指示模块， 所述移动终端包括信 号接收模块和单频网多播广播帧判断模块，
所述单频网多播广播帧指示模块， 用于将单频网多播广播帧即 MBSFN 帧的重复周期和偏移量作为指示无线帧是否是 MBSFN帧的配置参数向移动 终端发送； 将重复周期作为必选参数， 将偏移量作为可选参数， 在所述可选 参数的值不为 0时才发送所述可选参数；
所述信号接收模块， 用于接收接入网络发送的用于指示无线帧是否是单 频网多播广播帧即 MBSFN帧的配置参数； 所述配置参数包括重复周期的值 MBSFN— rep 和偏移值的值 MBSFN— offset , 或者只包括重复周期的值 MBSFN— rep;
所述单频网多播广播帧判断模块，用于将满足下式 SFN mod MBSFN— rep =MBSFN— offset的无线帧判定为 MBSFN帧； 所述配置参数中没有偏移量信 息时， MBSFN— offset为 0; SFN为所述无线帧的序号， mod表示取模运算。
PCT/CN2009/070763 2008-03-14 2009-03-12 单频网多播广播帧的配置和指示方法及终端获知方法 WO2009111988A1 (zh)

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