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WO2009009946A1 - Method for realizing improving multimedia broadcast multicast service in multi-carrier cell - Google Patents

Method for realizing improving multimedia broadcast multicast service in multi-carrier cell Download PDF

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Publication number
WO2009009946A1
WO2009009946A1 PCT/CN2008/000358 CN2008000358W WO2009009946A1 WO 2009009946 A1 WO2009009946 A1 WO 2009009946A1 CN 2008000358 W CN2008000358 W CN 2008000358W WO 2009009946 A1 WO2009009946 A1 WO 2009009946A1
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Prior art keywords
mbms
cell
mbsfn
time slot
carrier
Prior art date
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PCT/CN2008/000358
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English (en)
French (fr)
Inventor
Zijiang Ma
Min Fang
Bin Wang
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ZTE Corp
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ZTE Corp
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Publication date
Priority claimed from CN2007101304131A external-priority patent/CN101262635B/zh
Application filed by ZTE Corp filed Critical ZTE Corp
Publication of WO2009009946A1 publication Critical patent/WO2009009946A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/30Resource management for broadcast services

Definitions

  • the present invention relates to the field of wireless communications, and more particularly to implementing enhanced multimedia broadcast and multicast in a multi-frequency point cell in a Time Division Code Synchronization Division Multiple Access (TD-SCDMA) system.
  • TD-SCDMA Time Division Code Synchronization Division Multiple Access
  • MBMS Multimedia Broadcast Multicast Service
  • MBMS Multimedia Broadcast Multicast Service
  • MBS Multimedia Broadcast Multicast Service
  • MBMS services include: Multicast Service and Broadcast Service.
  • Each multicast service requires a joining process.
  • the user terminal (UE) needs to activate a multicast service to the BM-SC (Broadcast-Multicast Service Centre), and for each broadcast service, The UE only needs local activation.
  • the multicast service can adopt the bearer type of PTM (point-to-multipoint, but also abbreviated PTM or ptm) and PTP (point-to-point, also abbreviated PTP or ptp), and the broadcast service can only be used.
  • PTM point-to-multipoint
  • PTP point-to-point
  • the MBSFN (MBMS Single Frequency Network) technology is an enhanced MBMS technology.
  • MBSFN mode the UE can come from Signals from different base stations are considered multipath signals, and MBSFN greatly improves spectrum utilization.
  • the MBMS service mode is characterized by services in many scenarios. There is no terminal uplink feedback signal in progress, and the smart antenna is no longer suitable for the MBMS service mode. Therefore, the MBSFN technology is very beneficial for improving the gain and reducing interference of the MBMS service in the TD-SCDMA system.
  • the base stations of each cell transmit the same MBMS data content with the same frequency, the same scrambling code, and the same midamble (intermediate code) code, so that the UE can receive the same content from multiple cells as received.
  • the gain of the UE receiving the MBMS service can be improved.
  • the MBMS service is only carried in the P-T-M mode.
  • the downlink time slots including MCCH (MBMS Control Channel), MICH (MBMS Indicator Channel) or MTCH (MBMS Traffic Channel) are Non-MBSFN time slots, in Non-MBSFN time slots.
  • the base station of each cell does not require the same frequency, the same scrambling code, and the same midamble code to transmit the same MBMS data content, so the MBMS service content received by the UE on the Non-MBMS time slot does not obtain additional gain.
  • MBMS services such as: mobile TV, when the TV channels of each cell are the same, they can be sent on the MBSFN time slot, so that each cell sends the same TV channel on the MBSFN time slot, and the UE receives the TV channel.
  • Good gain can be obtained for the signal; for the MCCH channel and MICH of the MBMS, and some MBMS services (such as information specific to each cell, cell service information, etc.) carried on the MTCH, due to the MCCH of each cell, The contents of the MICH and part of the MTCH (the program specific to the cell) are different.
  • These MBSM channels are transmitted on the Non-MBSFN time slot, and the UE cannot obtain the gain when receiving these channels.
  • the enhanced MBMS technology is introduced, that is, the downlink time slot of one radio frame is divided into MBSFN time slot and Non-MBSFN time slot, which can improve the gain of the UE receiving the MBMS service.
  • the TD-SCDMA system in the 3GPP protocol is a single carrier system, that is, one cell corresponds to one carrier, and the spectrum width of a single carrier is 1.6M.
  • TD-SCDMA uses a relatively narrowband TDD (Time Division Duplex) mode, on a single carrier.
  • the theoretical peak rate is 2.8 Mbps, and some technical improvements are made at the base of a single carrier cell, namely:
  • N is per The number of carriers in each cell
  • the MBMS service needs to occupy a large amount of spectrum resources.
  • the MBMS is carried in a single-frequency cell, that is, a single-carrier cell, it will inevitably affect the normal operation of the normal service.
  • the MBMS service is carried in a multi-frequency cell,
  • the carrier cell because the spectrum resources of the cell are relatively rich, will not affect the normal service.
  • the power of the broadcast channel (BCH) including the cell can be covered.
  • the BCH is carried on TS0 (fixed downlink time slot) of the primary carrier, and the other carriers of TS0 have no transmission power, that is, the total transmission power of each carrier of TS0 is concentrated on the primary carrier.
  • the technical solution adopted by the invention is:
  • a method for implementing an enhanced MBMS service in a multi-carrier cell includes:
  • the downlink time slot is divided into an MBSFN time slot and a Non-MBSFN time slot; the same part of the MBMS service of each cell is configured to the MBSFN time slot; and the part of the MBMS service unique to each cell is configured to On the Non-MBSFN time slot;
  • the user terminal receives the MBMS service.
  • step a
  • step a
  • Only one MBMS control channel and one MBMS indication channel are configured in each multi-carrier cell, and one or more MBMS service channels are configured.
  • step a
  • the MBMS control channel, the MBMS indicator channel, and the part of the MBMS service unique to the cell The channel is configured on a primary carrier of one or more Non-MBSFN slots;
  • the same part of the MBMS traffic channel of each cell is configured to one or more MBSFN time slots of the primary carrier or a certain secondary carrier; the same MBMS traffic channel allocated by each cell to the MBSFN time slot should be the same carrier as other cells.
  • step a
  • the transmit power of all carriers of the one or more Non-MBSFN slots is concentrated to transmit on the primary carrier
  • the transmit power of all carriers of the one or more MBSFN slots is concentrated on one carrier for transmission.
  • the radio network controller sends the configured MBSFN time slot, the Non-MBSFN time slot, and the MBMS channel information to the user terminal in the entire multi-carrier cell by using the system broadcast message.
  • the radio network controller configures a new information unit in the system broadcast message, notifying the user terminal that one or more MBSFN slots are configured in the downlink time slot of the cell; and notifying the user terminal of the MBSFN Which downlink time slot is the slot, on which carrier the MBMS service is carried, and the current cell parameter identifier.
  • the radio network controller sends the configured MBSFN time slot, the Non-MBSFN time slot, and the MBMS channel information to the user terminal in the entire multi-carrier cell by using a higher layer command.
  • the radio network controller passes the radio resource control message or
  • the control information carried on the MBMS control channel informs the user terminal whether the MBSFN time slot is configured in the local cell, and which downlink time slot these MBSFN time slots are, on which carrier the MBMS service and the current cell parameter identifier are carried.
  • step c is specifically:
  • the user terminal is configured according to the MBMS control channel and/or the MBMS indication channel configuration information.
  • the primary carrier of the Non-MBSFN time slot receives the MBMS control channel and/or the MBMS indication channel; when the user terminal wants to receive the MBMS service carried on the MBSFN time slot, the information of the MBMS service channel is read according to the configuration information, and Path merge improves receiver gain; when the user When the terminal receives the MBMS service carried on the Non-MBSFN time slot, it receives the information of the MBMS service channel on the primary carrier.
  • the method of the technical solution of the present invention fully combines the characteristics of the single-frequency network and the multi-carrier cell, classifies the service according to the characteristics of the multimedia broadcast multicast service, and allocates the MBSFN time slot for each multi-carrier cell common service, and each On the multi-carrier cell-specific service Non-MBSFN time slot, the terminal 4 performs service reception from the corresponding time slot according to the corresponding configuration information.
  • the single-frequency time slot is utilized for the common service, and each cell uses the same frequency, the same scrambling code, and the same midamble (intermediate code) code to transmit the same MBMS data content, so that the UE can receive multiple received data.
  • the same content of the cell is regarded as the multipath of one cell, which can improve the gain of the UE receiving the common MBMS service.
  • other personalized services are carried on multiple carrier frequencies, and the spectrum resources of the cells are relatively rich, which does not affect ordinary services.
  • the transmit power of all carriers of one or more Non-MBSFN slots is also concentrated to transmit on the primary carrier; the transmit powers of all carriers of one or more MBSFN slots are concentrated to one carrier for transmission.
  • the MBMS service of the same part for each cell can improve the receiving gain of the user terminal by multipath combining.
  • FIG. 1 is a schematic diagram of an MBMS enhancement technique in the prior art
  • FIG. 2 is a flowchart of a method for implementing an enhanced MBMS service in a multi-carrier cell according to the present invention
  • FIG. 3 is a specific implementation diagram of a method for implementing an enhanced MBMS service in a multi-carrier cell according to the present invention
  • FIG. 4 is a schematic diagram of another specific implementation of a method for implementing an enhanced MBMS service in a multi-carrier cell according to the present invention.
  • the present invention is to explain how to carry the enhanced MBMS technology in a multi-frequency cell, that is, how to implement the function of enhancing the MBMS technology in the multi-frequency cell of the TD-SCDMA system.
  • the invention realizes an enhanced MBMS service in a multi-frequency point cell based on the existing multi-frequency point labeling, such as: a mobile TV service (an MBMS service, characterized in that multiple cells send the same TV) Channel).
  • a mobile TV service an MBMS service, characterized in that multiple cells send the same TV
  • FIG. 2 first, since the TD-SCDMA system can perform time division multiplexing on one carrier, the downlink time slot carrying the MBMS service channel can be further divided into MBSFN time slots and Non-MBSFN time slots; UTRAN
  • the MBSFN time slot is configured in (Node B) so that the mobile TV service can be carried on the MBSFN time slot; then, the RNC (Radio Resource Controller) configures the MBSFN time slot and the MBMS related channel through broadcast messages or higher layer signaling.
  • the parameter is sent to the cell, so that the UE (user equipment) in the cell can receive the configuration information of the UTRAN.
  • the control channel for the MBMS and the bearer method of the traffic channel can also be used. Similar to the bearer method of the BCH, all the power of all carriers on the time slot carrying the MBMS channel is concentrated on one carrier for transmission.
  • UEs interested in mobile TV or other MBMS services can receive MBMS services (including mobile TV services) on these MBSFN time slots and Non-MBSFN time slots.
  • FIG. 3 is a schematic diagram of implementing an enhanced MBMS technology by using time division multiplexing in an N-frequency cell.
  • the downlink time slot carrying the MBMS service channel is further divided into an MBSFN time slot and a Non-MBSFN time slot; then, in the Node B of the UTRAN, the MBSFN time slot and the Non-MBSFN time slot are configured. And configure the control channel, indicator channel and traffic channel of the MBMS.
  • a multi-frequency cell has multiple frequency points, one primary frequency point and multiple secondary frequency points. Assume that the number of multi-frequency points N-3 includes one primary carrier and two secondary carriers.
  • the broadcast channel (BCH) of the cell is carried on TS0 of the primary carrier.
  • MCCH MBMS Control Channel
  • MICH Intelligent Channel of MBMS
  • One or more MTCHs may be configured in each N-frequency cell, and some MTCHs are configured on the Non-MBSFN time slots, and some MTCHs are configured on the MBSFN time slots.
  • MCCH> MICH and part of MTCH special MBMS services of this part of MTCH bearer cell, such as hotels, restaurants, shopping centers related to this cell
  • MCCH special MBMS services of this part of MTCH bearer cell, such as hotels, restaurants, shopping centers related to this cell
  • the content of the MCCH and the MICH of each cell are different, so it can only be configured on the Non-MBSFN time slot.
  • a part of the MTCH of a cell carries the MBMS service specific to the cell. These MTCHs can only be configured in the Non-MBSFN time slot. on.
  • the MBMS channel configured to the Non-MBSFN slot must be configured on the primary carrier of these slots, because in the N-frequency cell of the TD-SCDMA system, before the UE is selected, the UE first selects the dedicated channel. Residing on the primary carrier, the UE can listen to the system broadcast cell on the primary carrier, respond to the paging, initiate a random access procedure, etc., and the MBMS channel configured in the Non-MBSFN time slot does not need to perform macro diversity with the neighboring cell. The same frequency point as the MBMS channel of the neighboring cell is not required.
  • the power of all carriers of the Non-MBSFN time slot is concentrated on the primary carrier for transmission, in order to ensure that the signal power of the MCCH and the MICH and the MTCH can cover the entire multi-frequency point cell, and the configuration methods of these logical channels are also adopted and broadcasted.
  • a channel-like configuration method that is, all the power of the time slot transmitted on the primary carrier, and no transmission power on the secondary carrier.
  • the Non-MBSFN time slot in which the MCCH, MICH, or MTCH is configured may also be a TS0 time slot.
  • MBMS information and broadcast messages are respectively transmitted at different time intervals (TS0 time slots of different radio frames).
  • Part of the MTCH (the part of the MTCH carrying the same MBMS service of each cell) is configured on one or more MBSFN time slots, and can be configured on the primary carrier or a certain secondary carrier of the time slot or the time slots, and the time period is The transmit power of all carriers of the slot is concentrated on this carrier, and there is no transmit power on all other carriers (if transmitting on a certain secondary carrier of MBSFN, the secondary carrier concentrates the total power of all carriers in the slot) , and other carriers, including the main Carrier, no transmit power in this time slot).
  • the MBMS channel configured to the MBSFN slot should be at the same frequency as other cells.
  • the MBMS service of the cell is the same as the MBMS service of the neighboring cell, that is to say, these MBMS services are the same in multiple cells, such as mobile TV channels. These same MBMS services are configured on the MBSFN time slot, as shown in FIG.
  • Cell which is a method for configuring a mobile TV channel in multiple cells and improving the receiving gain of the UE through enhanced MBMS technology, such as: Cell (cell A, cell B, cell C, cell A has carrier frequency fl, f2, ⁇ ; cell has carrier frequency ⁇ , f3, f4; cell C has carrier frequency ⁇ , f4, f5, where the first frequency The point is the primary frequency point, and the other is the secondary frequency point; the MBSFN time slot of cell A is TS3, TS4, the MBSFN time slot of cell B is TS4, and the MBSFN time slot of cell C is TS4, TS5), all have the same
  • the mobile TV channel is configured on the time slot 4 of the carrier frequency ⁇ of the cell A ( ⁇ , TS4), and is arranged on the time slot 4 of the carrier frequency ⁇ of the cell ( ⁇ , TS4), It is also arranged on the time slot 4 of the carrier frequency ⁇ of the cell C ( ⁇ , TS4 ).
  • the UEs that are interested in the TV channel residing in the cell ⁇ , or ⁇ or C can obtain the MBMS signals of the three cells, like the three multipaths of one radio signal, and obtain the gain through macro diversity. Get better quality of mobile TV reception.
  • Step 2 Send configuration information to the UE in the multi-carrier cell.
  • the RNC of the UTRAN sends configuration information such as configured MBSFN time slot, Non-MBSFN time slot, and MBMS channel information through system broadcast messages or other high layer signaling.
  • configuration information such as configured MBSFN time slot, Non-MBSFN time slot, and MBMS channel information through system broadcast messages or other high layer signaling.
  • a new information element is configured to notify the UE that the cell supports the MBSFN mode, that is, one or more of the downlink time slots of the cell are configured. MBSFN time slot.
  • SIB3 System Broadcast Message 3
  • a new information element is configured to notify the UE which time slots of the cell are MBSFN time slots, and each MBSFN time slot.
  • a slot number that is, indicating which downlink slot is the MBSFN
  • frequency point information that is, on which carrier the MBMS service is carried
  • a cell parameter identifier (a cell parameter identifier corresponding to a cell parameter identifier) (middle) code, four scrambling codes).
  • the RNC (Radio Network Controller) of the UTRAN may also notify the UE by using high layer signaling, such as RRC (Radio Resource Control) message, or control information carried on the MCCH, whether the cell is configured with MBSFN time slots, and these MBSFNs.
  • RRC Radio Resource Control
  • the information related to the time slot that is, the time slot number described above.
  • the RNC of the UTRAN configures the relevant channels of the MBMS, it needs to indicate which time slot or channels in which these channels are configured, and does not need to indicate at which frequency point (carrier) these channels are configured, because when these channels are configured in the Non-MBSFN time slot.
  • the frequency is inevitably the primary frequency point, when these channels are configured in the MBSFN time slot, the frequency point is determined by the MBSFN time slot configured in the front.
  • UEs interested in mobile TV or other MBMS services in the cell may receive MBMS services (including mobile TV services) on the MBSFN time slots and Non-MBSFN time slots configured in the configuration information.
  • the UE can know the configuration information of the MCCH and/or the MICH by receiving a system broadcast message or other RRC message;
  • the MCCH and/or MICH channel can be received;
  • the UE also determines where to receive the MBMS service of interest through the MTCH information configured on the MCCH; if the UE is interested in a certain/some MBMS service (eg, mobile TV), and this/these services are carried in the MBSFN On the time slot, the UE reads the MTCH information according to the known cell parameter ID and the frequency point (which may be the primary carrier or a certain secondary carrier), and can improve the receiving gain through multipath combining; / These services are carried on the Non-MBSFN time slot, then the UE will receive the MTCH information on the primary carrier.
  • the invention may be embodied in various other forms without departing from the spirit and scope of the invention. Industrial applicability
  • the method for realizing enhanced multimedia broadcast and multicast service, ie MBMS, in a multi-frequency point cell is applicable to the field of wireless communication, in particular to time division synchronous code division multiple access
  • the MBMS services are classified according to the service characteristics, and the common services of the cells are carried on the single-frequency time slots, and the personalized services of the other cells are carried on the non-single-frequency time slots.
  • the multipath combining can be used to enhance the service gain on the single frequency time slot, and the normal service reception of the multi-carrier cell can be considered.
  • the technical solution of the present invention expands the implementation manner of the MBMS service, especially the enhanced MBMS service in the multi-carrier cell, which will greatly improve the application capability of the MBMS service.

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  • Computer Networks & Wireless Communication (AREA)
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Description

一种在多载波小区实现增强业务多媒体广播组播的方法
技术领域
本发明涉及无线通讯领域, 特别涉及在时分同步码分多址接入(Time Division Code Synchronization Division Multiple Access, TD-SCDMA ) 系统 中, 一种在多频点小区中实现增强的多媒体广播和组播业务 (MBMS , Multimedia Broadcast Multicast Service ) 的方法。
背景技术
随着大屏幕多功能手机的普及, 移动数据业务的应用越来越广泛,对移 动通信的需求已不再满足于电话、消息和手机上网浏览业务, 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。 MBMS 业务包括: 组播业务( Multicast Service )和广播业务 ( Broadcast Service )。 每个组播业务都需要 Joining (加 入) 过程, 用户终端 ( UE ) 需要到 BM-SC (广播多播业务中心, Broadcast-Multicast Service Centre )激活某个组播业务, 而对于每个广播业 务, UE只需要本地激活就可以了。 在无线承载的配置上, 组播业务可以采 用 P-T-M (点到多点, 也可以简写 PTM或 ptm )和 P-T-P (点到点, 也可以 简写 PTP或 ptp ) 的承载类型, 而广播业务只能釆用 P-T-M。
MBSFN ( MBMS single Frequency Network, MBMS单频网) 技 术, 是增强的 MBMS技术, 简称增强 MBMS技术, 所有相邻基站同 步发射相同的无线信号, 见图 1 , 在 MBSFN模式下, UE可以将来自 于不同基站的信号视为多径信号, MBSFN大大提高了频谱利用率。
对于 TD-SCDMA系统,由于 MBMS业务模式的特点是很多场景下业务 进行中没有终端上行反馈信号, 智能天线不再适合于 MBMS业务模式下, 所以 MBSFN技术对于提高 TD-SCDMA系统中进行 MBMS业务的增益和降 低干扰非常有益。
在 MBSFN时隙, 各个小区的基站用相同的频率、 相同的扰码、 相同的 midamble (中间码)码发送相同的 MBMS数据内容, 这样 UE可以将接收到 的来自多个小区的相同内容, 视为一个小区的多径一样, 可以提高 UE接收 MBMS业务的增益。在 MBSFN时隙, MBMS业务仅采用 P-T-M方式承载。 除了 MBSFN时隙的其它承载了 MBMS的信道, 包括 MCCH ( MBMS控制 信道)、 MICH ( MBMS指示信道)或 MTCH ( MBMS业务信道)的下行时 隙就是 Non-MBSFN时隙, 在 Non-MBSFN时隙, 各个小区的基站不要求采 用相同的频率、 相同的扰码、相同的 midamble码发送相同的 MBMS数据内 容, 因此 UE在 Non-MBMS时隙上接收到的 MBMS业务内容不会获得额外 的增益。
对于一些 MBMS业务, 如: 手机电视, 当各个小区的电视频道相同时, 可以放在 MBSFN时隙上发送, 这样由于各个小区都在 MBSFN时隙上发送 相同的电视频道, UE接收这个电视频道的信号时可以获得很好的增益; 而 对于 MBMS的 MCCH信道和 MICH, 以及一些承载在 MTCH上的 MBMS 业务(如:每个小区特有的信息,小区服务信息等),由于每个小区的 MCCH、 MICH和部分 MTCH (本小区特定的节目) 的内容不同, 这些 MBSM信道 在 Non-MBSFN时隙上发送, UE接收这些信道时无法获得增益。
在 TD-SCDMA系统中, 通过引入增强的 MBMS技术, 也就是说, 将一 个无线帧的下行时隙分为 MBSFN时隙和 Non-MBSFN时隙, 可以提高 UE 接收 MBMS业务的增益。
目前 3GPP协议中的 TD-SCDMA系统是单载波系统, 即一个小区对应 一个载波,单个载波的频谱宽度为 1.6M, 由于 TD-SCDMA釆用相对窄带的 TDD (时分双工)方式, 单个载波上的理论峰值速率为 2.8Mbps, 在单载波 小区的基 进行一些技术改进, 即: 在一个 TD-SCDMA小区, 有多个载波, 这样每个小区的频谱宽度就为 N* 1.6M ( N是每个小区的载波个数) , 可以 满足运营商对下行分组数据业务更高的需求。 MBMS业务, 需要占用大量的频谱资源, 如果将 MBMS承载在单频点 小区——即单载波小区, 必然影响普通业务的正常运行, 而如杲将 MBMS 业务承载在多频点小区一一即多载波小区, 由于该小区的频谱资源比较丰 富, 不会对普通业务造成影响。
在目前,为了包括小区的广播信道(BCH )的功率可以覆盖到整个小区,
BCH承载在主载波的 TS0 (固定的下行时隙)上, 而 TS0的其它载波没有 发送功率, 也就是说 TS0的各个载波的全部发射功率都集中到主载波上。
现有技术中, 还没有将 MBMS业务承载在多载波小区的方法。 发明内容
本发明的目的是提供一种在多载波小区实现增强 MBMS业务的方法。 本发明采用的技术方案是:
一种在多栽波小区实现增强 MBMS业务的方法, 包括:
a、 在多载波小区, 将下行时隙划分为 MBSFN时隙和 Non-MBSFN时 隙; 将各小区相同的那部分 MBMS业务配置到 MBSFN时隙上; 将各小区 特有的那部分 MBMS业务配置到 Non-MBSFN时隙上;
b、 将配置信息发送给整个多载波小区中的用户终端;
c、 用户终端 居配置信息接收 MBMS业务。
进一步地, 所述步骤 a中:
将 MBMS控制信道、 MBMS指示信道及小区特有的那部分 MBMS业务 信道配置到一个或多个 Non-MBSFN时隙上;将各小区相同的那部分 MBMS 业务信道配置到一个或多个 MBSFN时隙上。
进一步地, 所述步骤 a中:
在每个多载波小区仅配置一条 MBMS控制信道和一条 MBMS指示信 道, 配置一条或多条 MBMS业务信道。
进一步地, 所述步骤 a中:
将 MBMS控制信道、 MBMS指示信道及小区特有的那部分 MBMS业务 信道配置到一个或多个 Non-MBSFN时隙的主载波上;
将各小区相同的那部分 MBMS业务信道配置到一个或多个 MBSFN时 隙的主载波或某个辅载波上; 各小区配置到 MBSFN时隙上的同一 MBMS 业务信道应与其它小区同载波。
进一步地, 所述步骤 a中:
所述一个或多个 Non-MBSFN时隙的所有载波的发射功率都集中到主载 波上发射;
所述一个或多个 MBSFN时隙的所有载波的发射功率都集中到一个载波 上发射。
进一步地, 所述步骤 b中, 无线网络控制器通过系统广播消息将配置好 的 MBSFN时隙、 Non-MBSFN时隙, 以及 MBMS信道的信息发送到整个多 载波小区中的用户终端。
进一步地, 所述步骤 b中, 无线网络控制器在系统广播消息中配置新的 信息单元,通知用户终端该小区的下行时隙中配置有一个或多个 MBSFN时 隙; 并通知用户终端 MBSFN 时隙是哪个下行时隙、 在哪个载波上承载 MBMS业务、 以及本小区参数标识。
进一步地, 所述步骤 b 中, 无线网络控制器通过高层指令将配置好的 MBSFN时隙、 Non-MBSFN时隙, 以及 MBMS信道的信息发送到整个多载 波小区中的用户终端。
进一步地, 所述步骤 b 中, 无线网络控制器通过无线资源控制消息或
MBMS 控制信道上承载的控制信息, 通知用户终端本小区是否配置了 MBSFN时隙, 以及这些 MBSFN时隙是哪个下行时隙、 在哪个载波上承载 MBMS业务和本小区参数标识。
进一步地, 所述步骤 c具体为:
用户终端根据 MBMS 控制信道和 /或 MBMS 指示信道的配置信息在
Non-MBSFN时隙的主载波接收到 MBMS控制信道和 /或 MBMS指示信道; 当用户终端要接收承载在 MBSFN时隙上的 MBMS业务时, 根据配置 信息读取 MBMS业务信道的信息, 并通过多径合并提高接收增益; 当用户 终端要接收承栽在 Non-MBSFN时隙上的 MBMS业务时, 则在主载波上接 收 MBMS业务信道的信息。
本发明的技术方案所述方法,充分结合了单频网与多载波小区的各自特 点,根据多媒体广播组播业务的特性对业务进行分类,将各个多载波小区共 同业务分配 MBSFN时隙, 而各多载波小区特有业务 Non-MBSFN时隙上, 由终端 4艮据相应配置信息从对应时隙上进行业务接收。一方面对共同业务利 用了单频时隙,各个小区釆用相同的频率、相同的扰码、相同的 midamble (中 间码)码发送相同的 MBMS数据内容,这样 UE可以将接收到的来自多个小 区的相同内容, 视为一个小区的多径一样, 可以提高 UE接收共同 MBMS 业务的增益。 另一方面还将其它个性业务承载在多个载频上, 利用小区的频 谱资源比较丰富的特点, 不对普通业务造成影响。
进一步地,还将一个或多个 Non-MBSFN时隙的所有载波的发射功率都 集中到主栽波上发射; 将一个或多个 MBSFN时隙的所有载波的发射功率都 集中到一个载波上发射, 以增强 MBMS业务的接收效果。 另外, 采用了本 发明的方法后, 对于各小区相同的那部分 MBMS业务可以通过多径合并提 高用户终端的接收增益。 附图概述
图 1是现有技术中 MBMS增强技术的示意图;
图 2是本发明在多载波小区实现增强 MBMS业务的方法的流程图; 图 3是本发明在多载波小区实现增强 MBMS业务的方法的具体实施示 意图;
图 4是本发明在多栽波小区实现增强 MBMS业务的方法的另一个具体 实施示意图。
本发明的较佳实施方式
下面将结合附图及实施例对本发明的技术方案进行更详细的说明。 本发明, 就是说明如何将增强 MBMS技术承载在多频点小区中, 也就 是说, 如何在 TD-SCDMA系统的多频点小区实现增强 MBMS技术的功能。 本发明是在现有的多频点行标的基础上, 在多频点小区中, 实现增强的 MBMS业务, 如: 手机电视业务 (一种 MBMS业务, 其特点是多个小区都 发送相同的电视频道) 。 具体地如图 2所示, 首先由于 TD-SCDMA系统可 以在一个载波上进行时分复用, 所以可以将承载 MBMS 业务信道的下行时 隙进一步划分为 MBSFN 时隙和 Non-MBSFN 时隙; 然后在 UTRAN
(节点 B ) 中配置 MBSFN时隙, 以便手机电视业务可以承栽在 MBSFN时 隙上;然后, RNC (无线资源控制器)通过广播消息或高层信令,将 MBSFN 时隙和 MBMS相关信道的配置参数发送到小区中, 以便该小区中的 UE (用 户设备)可以接收到 UTRAN的配置信息; 为了使 MBMS的发射功率可以 覆盖到整个小区, 对于 MBMS的控制信道和业务信道的承载方法也可以采 用类似于 BCH的承载方法,即将承载 MBMS信道的时隙上的所有载波的全 部功率都集中到一个载波上发射。
最后,对手机电视或其它 MBMS业务感兴趣的 UE,可以在这些 MBSFN 时隙和 Non-MBSFN时隙上接收 MBMS业务(包括手机电视业务) 。
下面结合图 3, 介绍具体实施例。
图 3为 N频点小区中用时分复用方式实现增强 MBMS技术的示意图。 首先, 在一个 N频点小区中, 将承载 MBMS 业务信道的下行时隙进一 步划分为 MBSFN时隙和 Non-MBSFN时隙; 然后在 UTRAN的 Node B中, 配置 MBSFN时隙和 Non-MBSFN时隙, 并配置 MBMS的控制信道、 指示 信道和业务信道。
通常, 一个多频点小区有多个频点, 一个主频点和多个辅频点。 假设多 频点的个数 N-3, 包括一个主载波和 2个辅载波。 小区的广播信道(BCH ) 承载在主载波的 TS0上。
在每个 N频点小区仅配置一条 MCCH( MBMS控制信道)和一条 MICH ( MBMS的指示信道) , 且都配置在 Non-MBSFN时隙上。 在每个 N频点小区可以配置一条或多条 MTCH ( MBMS业务信道) , 有的 MTCH配置到 Non-MBSFN时隙上, 有的 MTCH配置到 MBSFN时隙 上。
1 )MCCH> MICH和部分 MTCH(这部分 MTCH承载小区的特殊 MBMS 业务, 例如有关这个小区的宾馆、 饭店、 购物中心) 配置在一个或多个 Non-MBSFN时隙上, 且必须配置到这个或这些时隙的主载波上, 且这个或 这些时隙的所有载波的发射功率都集中到主载波上发射,而所有辅载波上都 没有发射功率。
每个小区的 MCCH 和 MICH 的内容都不相同, 所以只能配置在 Non-MBSFN时隙上, 一个小区的部分 MTCH承载该小区特有的 MBMS业 务, 这些 MTCH也只能配置在 Non-MBSFN时隙上。
配置到 Non-MBSFN时隙的 MBMS信道必须配置在这些时隙的主载波 上, 这是因为在 TD-SCDMA系统的 N频点小区中, UE在被分配专用信道 前, 在选择小区后, 首先驻留在主载波上, UE在主载波上可以收听系统广 播小区, 响应寻呼, 发起随机接入过程等, 而且配置在 Non-MBSFN时隙的 MBMS信道不需要和相邻小区进行宏分集, 不需要和相邻小区的 MBMS信 道同频点。
将 Non-MBSFN时隙的所有载波的功率都集中到主载波上发射,这是为 了保证 MCCH和 MICH和 MTCH的信号功率可以覆盖到整个多频点小区 , 这些逻辑信道的配置方法也采用和广播信道相似的配置方法, 即: 主载波 上发射这个时隙的全部功率, 而辅载波上没有发射功率。
配置了 MCCH、 MICH或 MTCH的 Non-MBSFN时隙也可以是 TS0时 隙, 此时在 TS0的主载波上, 不同时间间隔 (不同的无线帧的 TS0时隙) 分别发射 MBMS信息和广播消息。
2 )部分 MTCH (这部分 MTCH承载各小区相同的 MBMS业务) 配置 在一个或多个 MBSFN时隙上,可以配置到这个或这些时隙的主载波或某个 辅载波上,且这个或这些时隙的所有载波的发射功率都集中到这个载波上发 射, 而所有其它载波上都没有发射功率(如果在 MBSFN的某个辅载波上发 射, 则该辅载波集中了该时隙所有载波的全部功率, 而其它载波, 也包括主 载波, 在这个时隙没有发射功率) 。
配置到 MBSFN时隙上的 MBMS信道应与其它小区同频点。
小区的部分 MBMS业务和相邻小区的 MBMS业务相同,也就是说这些 MBMS业务在多个小区中是相同的,如手机电视频道。将这些相同的 MBMS 业务配置在 MBSFN时隙上, 如图 4所示, 是一个将手机电视频道配置在多 个小区中, 并通过增强的 MBMS技术提高 UE的接收增益的方法, 如: 在 3 个小区 (小区 A, 小区 B, 小区 C, 小区 A有载频 fl, f2, β; 小区 Β有载 频 Ω, f3 , f4; 小区 C有载频 β, f4, f5, 其中第一个频点是主频点, 其它 的是辅频点; 小区 A的 MBSFN时隙是 TS3, TS4, 小区 B的 MBSFN时隙 是 TS4, 小区 C的 MBSFN时隙是 TS4, TS5 ) 中, 都有相同的某个手机电 视频道, 则将手机电视频道配置在小区 A的载频 β的时隙 4上(β, TS4 ) , 并配置在小区 Β的载频 β的时隙 4上(β, TS4 ) , 还配置在小区 C的载频 β的时隙 4上(β, TS4 ) 。 这样, 驻留在小区 Α、 或^ 或 C的对该电视 频道感兴趣的 UE,都可以获得三个小区的 MBMS信号, 如同一个无线信号 的 3个多径一样, 并通过宏分集获得增益, 得到更好的手机电视接收质量。
当某个或某些下行时隙上的一个载波上承载了 MBMS信道(包括 MICH 或 MCCH或 MTCH ) 时, 这个或这些下行时隙的其它载波上一般不再分配 功率,从而使这个或这些下行时隙的所有载波的功率到集中到这个载波上发 射, 以提高 MBMS信道的覆盖范围, 这种方法和目前的多载波中广播信道 的发射方法相同。 第二步: 发送配置信息到多载波小区中的 UE。 在一个配置有 MBSFN 时隙的多频点小区中, UTRAN的 RNC通过系统广播消息或其它高层信令, 将配置好的 MBSFN时隙、 Non-MBSFN时隙, 以及 MBMS信道的信息等配 置信息发送到整个多频点小区:
通过系统广播消息发送配置信息的具体实现方法:
1 )在系统广播消息中, 如: 系统广播消息 3 (简写为 SIB3 ) 中, 配置 新的信息单元, 以通知 UE该小区支持 MBSFN模式, 即该小区的下行时隙 中配置有一个或多个 MBSFN时隙。 2 ) 当该小区配置有 MBSFN时隙, 在系统广播消息中, 如: 系统广播 消息 5中,配置新的信息单元,以通知 UE该小区哪些时隙是 MBSFN时隙, 以及每个 MBSFN时隙的相关信息, 包括: 时隙编号, 即: 指明该 MBSFN 是哪个下行时隙; 频点信息, 即在哪个载波上承载 MBMS业务; 和小区参 数标识( Cell parameters ID, 一个小区参数标识对应一个 midamble (中间) 码、 四个扰码) 。 通过其它高层信令发送配置信息的具体实现方法
UTRAN的 RNC (无线网络控制器), 也可以通过高层信令, 如: RRC (无线资源控制)消息, 或 MCCH上承载的控制信息, 通知 UE, 该小区是 否配置了 MBSFN时隙, 以及这些 MBSFN时隙的相关信息, 即前文所述的 时隙编号等。
UTRAN的 RNC配置 MBMS的相关信道时, 需要指明这些信道配置在 哪个或哪些时隙, 而并不需要指明这些信道配置在哪个频点(载波)上, 因 为当这些信道配置在 Non-MBSFN时隙时, 其频点必然是主频点, 当这些信 道配置在 MBSFN时隙时, 其频点由在前面配置 MBSFN时隙时已经确定。
第三步, 小区中对手机电视或其它 MBMS业务感兴趣的 UE, 可以在配 置信息中配置的这些 MBSFN时隙和 Non-MBSFN时隙上接收 MBMS业务 (包括手机电视业务) 。
1 ) UE通过接收系统广播消息或其它 RRC消息, 可以知道 MCCH和 / 或 MICH的配置信息;
2 ) 然后, 在 Non-MBSFN时隙的主栽波上, 可以接收到 MCCH和 /或 MICH信道;
3 ) UE通过 MCCH上配置的 MTCH信息, 也确定在哪里接收感兴趣的 MBMS业务; 如果 UE对某个 /某些 MBMS业务(如: 手机电视)感兴趣, 且这个 /这些业务是承载在 MBSFN时隙上, 则 UE根据已知的 cell parameter ID和频点(可能是主载波, 也可能是某个辅载波)等,读取 MTCH的信息, 并可以通过多径合并提高接收增益; 如果这个 /这些业务是承载在 Non-MBSFN时隙上, 则 UE—定是在主载波上接收到 MTCH信息。 当然, 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 形, 但这些相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
本发明的在多频点小区中实现增强的多媒体广播和组播业务即 MBMS 的方法, 适用于无线通讯领域, 特别涉及在时分同步码分多址接入
TD-SCDMA系统中, 将 MBMS业务按照业务特性进行分类, 将各小区共同 业务承栽在单频时隙上, 而将其它各小区的个性业务则承载在非单频时隙 上, 以此既能利用多径合并增强单频时隙上的业务增益, 又能兼顾多载波小 区的普通业务的接收。 本发明的技术方案拓展了 MBMS业务的实现方式, 尤其是在多载波小区中实现了增强的 MBMS业务,将极大提高 MBMS业务 应用能力。

Claims

权 利 要 求 书
1、 一种在多载波小区实现增强 MBMS业务的方法,其特征在于,包括: a、 在多载波小区, 将下行时隙划分为 MBSFN时隙和 Non-MBSFN时 隙; 将各小区相同的那部分 MBMS业务配置到 MBSFN时隙上; 将各小区 特有的那部分 MBMS业务配置到 Non-MBSFN时隙上;
b、 将配置信息发送给整个多载波小区中的用户终端;
c、 用户终端根据配置信息接收 MBMS业务。
2、 根据权利要求 1所述的方法, 其特征在于, 所述步骤 a中: 将 MBMS控制信道、 MBMS指示信道及小区特有的那部分 MBMS业务 信道配置到一个或多个 Non-MBSFN时隙上;将各小区相同的那部分 MBMS 业务信道配置到一个或多个 MBSFN时隙上。
3、 根据权利要求 2所述的方法, 其特征在于, 所述步骤 a中: 在每个多载波小区仅配置一条 MBMS控制信道和一条 MBMS指示信 道, 配置一条或多条 MBMS业务信道。
4、 根据权利要求 1、 2或 3所述的方法, 其特征在于, 所述步骤 a中: 将 MBMS控制信道、 MBMS指示信道及小区特有的那部分 MBMS业务 信道配置到一个或多个 Non-MBSFN时隙的主载波上;
将各小区相同的那部分 MBMS业务信道配置到一个或多个 MBSFN时 隙的主载波或某个辅载波上; 各小区配置到 MBSFN时隙上的同一 MBMS 业务信道应与其它小区同载波。
5、 根据权利要求 4所述的方法, 其特征在于, 所述步骤 a中: 所述一个或多个 Non-MBSFN时隙的所有载波的发射功率都集中到主载 波上发射;
所述一个或多个 MBSFN时隙的所有载波的发射功率都集中到一个载波 上发射。
6、 根据权利要求 1所述的方法, 其特征在于, 所述步骤 b中, 无线网 络控制器通过系统广播消息将配置好的 MBSFN时隙、 Non-MBSFN时隙, 以及 MBMS信道的信息发送到整个多载波小区中的用户终端。
7、 根据权利要求 6所述的方法, 其特征在于, 所述步骤 b中, 无线网 络控制器在系统广播消息中配置新的信息单元,通知用户终端该小区的下行 时隙中配置有一个或多个 MBSFN时隙; 并通知用户终端 MBSFN时隙是哪 个下行时隙、 在哪个载波上承载 MBMS业务、 以及本小区参数标识。
8、 根据权利要求 1所述的方法, 其特征在于, 所述步骤 b中, 无线网 络控制器通过高层指令将配置好的 MBSFN时隙、 Non-MBSFN时隙, 以及 MBMS信道的信息发送到整个多载波小区中的用户终端。
9、 根据权利要求 8所述的方法, 其特征在于, 所述步骤 b中, 无线网 络控制器通过无线资源控制消息或 MBMS控制信道上承载的控制信息, 通 知用户终端本小区是否配置了 MBSFN时隙, 以及这些 MBSFN时隙是哪个 下行时隙、 在哪个载波上承载 MBMS业务和本小区参数标识。
10、 根据权利要求 1所述的方法, 其特征在于, 所述步骤 c具体为: 用户终端根据 MBMS 控制信道和 /或 MBMS 指示信道的配置信息在 Non-MBSFN时隙的主载波接收到 MBMS控制信道和 /或 MBMS指示信道; 当用户终端要接收承载在 MBSFN时隙上的 MBMS业务时, 根据配置 信息读取 MBMS业务信道的信息, 并通过多径合并提高接收增益; 当用户 终端要接收承载在 Non-MBSFN时隙上的 MBMS业务时, 则在主载波上接 收 MBMS业务信道的信息。
PCT/CN2008/000358 2007-07-18 2008-02-18 Method for realizing improving multimedia broadcast multicast service in multi-carrier cell Ceased WO2009009946A1 (en)

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