WO2009121300A1 - Dispositif et procédé permettant de transmettre les données de commande de service mbms - Google Patents

Dispositif et procédé permettant de transmettre les données de commande de service mbms Download PDF

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Publication number
WO2009121300A1
WO2009121300A1 PCT/CN2009/071128 CN2009071128W WO2009121300A1 WO 2009121300 A1 WO2009121300 A1 WO 2009121300A1 CN 2009071128 W CN2009071128 W CN 2009071128W WO 2009121300 A1 WO2009121300 A1 WO 2009121300A1
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WO
WIPO (PCT)
Prior art keywords
subframe
mbms
multimedia broadcast
channel
service control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2009/071128
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English (en)
Chinese (zh)
Inventor
杨晓东
丁昱
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Datang Mobile Communications Equipment Co Ltd
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Datang Mobile Communications Equipment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Datang Mobile Communications Equipment Co Ltd filed Critical Datang Mobile Communications Equipment Co Ltd
Priority to KR1020107024577A priority Critical patent/KR101162190B1/ko
Publication of WO2009121300A1 publication Critical patent/WO2009121300A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0037—Inter-user or inter-terminal allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • 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
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a multimedia broadcast service control data transmission method and apparatus. Background of the invention
  • the Multimedia Broadcast and Multicast Service (MBMS) technology broadcasts or multicasts multimedia data to a mobile terminal UE by sharing a transmission link.
  • the purpose of the MBMS service is to provide multi-user downlink data that can be unidirectional from one point to many points in a very efficient, economical, and shared manner.
  • the MBMS system can use a dedicated carrier (E-MBMS) or a carrier shared with a unicast system.
  • Multi-cell transmission the core of which is based on single-frequency network (SFN) downlink macro-diversity soft combining, which transmits service data in units of MBSFN areas in which multiple cells are combined, and requires multiple cells to synchronize. Also known as MBSFN transmission.
  • SFN single-frequency network
  • the MBMS service transmitted by using a single cell transmits MBMS service data by using a cell.
  • the MBMS service data of the MBMS system transmits broadcast information of the MBMS service to the user terminal (UE) through a fixed-position subframe in the radio frame, including a physical broadcast channel (P-BCH) and a synchronization channel, where the synchronization channel includes the main channel.
  • P-BCH physical broadcast channel
  • S-SCH secondary synchronization signal
  • the UE accesses the MBMS system by receiving the P-BCH, P-SCH, and S-SCH in the subframe, and then receives an MBMS primary control channel (P-MCCH) indicating the MBMS secondary control channel that the UE should receive (S- The specific location of the MCCH), after receiving the S-MCCH, the UE knows at what time slot and frequency to receive the specific MBMS service data through the MBMS Time Channel (MTCH).
  • P-BCH, P-SCH, S-SCH, The P-MCCH, the S-MCCH, and the like are used to implement control functions such as access, selection, and indication before transmitting specific MBMS service data, and can be broadly referred to as MBMS control data.
  • FIG. 1 is a subframe structure of the first MBMS control data transmission method.
  • FIG. 1 Schematic diagram, as shown in FIG. 1, in a subframe, each rectangular area represents an Orthogonal Frequency Division Multiplexing (OFDM) symbol, using an extended cyclic prefix (ECP), and the subcarrier spacing is 15 kHz.
  • OFDM Orthogonal Frequency Division Multiplexing
  • ECP extended cyclic prefix
  • a sub-frame has a total of 12 OFDM symbols.
  • the portion of the OFDM symbols that is not covered by the slanting line indicates that the part of the data is sent to the UE in a single cell manner, and the portion with the slanted line indicates that the OFDM symbol is transmitted to the UE by using the MBSFN mode. It is used to carry specific channel data, also known as OFDM resources. As shown in Figure 1, the P-SCH, S-SCH, and primary P-BCH of the multi-cell MBMS service are transmitted in a single cell, and other parts of the subframe are transmitted using MBSFN.
  • FIG. 2 is a schematic diagram of a subframe structure of a second method for transmitting a second MBMS service. As shown in FIG. 2, a P-SCH and an S-SCH of an MBMS service are transmitted by a single cell, and a P-BCH and other parts of the subframe are transmitted. Sent by MBSFN.
  • FIG. 3 is a schematic diagram of a subframe structure of a third MBMS service transmission method. As shown in FIG. 3, the P-SCH, the S-SCH, the P-BCH of the MBMS service, and other parts of the subframe are all sent by the MBSFN.
  • control channels P-MCCH and S-MCCH of the MBMS are both transmitted by the MBSFN, but specifically whether they are transmitted in the subframe carrying the physical broadcast channel and the synchronization channel, and There is no specific solution for the specific transmission location in the subframe, and currently there are some problems with these three methods.
  • the broadcast channel and the synchronization channel data of the MBMS service occupy a part of the reference signal of the MBSFN transmission frame, that is, the pilot, the data estimation of the MBSFN transmission part in the subframe is affected, so that the decoding of the subframe data is performed.
  • the same The time broadcast channel also needs to redesign the reference symbols to increase the complexity of the MBMS system to send MBMS services.
  • the method since the P-BCH is transmitted by the MBSFN, there is a problem that the MBSFN reference signal has to be blindly detected in order to decode the P-BCH, and like the first method, the method also has a problem of complicated transmission.
  • the third method is the most simple method of sending, and the system has the lowest transmission complexity. Therefore, in LTE, the third method is preferred.
  • Figure 4 shows a typical MBSFN coverage overlap scenario. As shown in Figure 4, the coverage of MBSFN area 1 and MBSFN area 2 partially overlap. To ensure MBSFN transmission, two MBSFN areas must send another MBSFN. The broadcast information of the area, that is, the above-mentioned subframe for carrying the broadcast information, is transmitted, so as to ensure that the UEs covering the overlapping part can normally access the two MBSFN areas. However, this also causes problems because it has been determined in LTE that the system bandwidth information and the number of system side antennas in the cell are transmitted in the P-BCH.
  • the system bandwidth of MBSFN area 1 is 10M
  • the number of antennas on the system side is set to 1
  • the system bandwidth of MBSFN area 2 is 20M
  • the number of antennas on the system side is 2
  • the system information indicated by P-BCH of two MBSFN areas is different.
  • the second method since the broadcast channel is also transmitted using MBSFN, the above problem also exists.
  • the first method does not cause the above problem because the P-BCH uses single cell transmission, it is not an ideal solution due to the complexity of transmission.
  • both the P-MCCH and the S-MCCH are transmitted in the MBSFN manner, so when the UE is in an overlay, there is overlap.
  • the non-overlapping part of the MBSFN area since the UE in the non-overlapping part can also receive the P-MCCH and the S-MCCH of another MBSFN area, but the MBSFN service data of another area is not transmitted in one MBSFN area, therefore The UE in the non-overlapping area does not receive the MBMS service data of another MBSF area.
  • the user of the UE does not know whether the received P-MCCH and S-MCCH are the P-MCCH and S-MCCH of the MBSFN area in which the UE is located, so the user of the UE is likely to receive the P-MCCH and the S-MCCH.
  • the specific MBMS service data cannot be received, so that the user experience of the MBMS service is adversely affected. Summary of the invention
  • the embodiment of the present invention provides a multimedia broadcast service control data transmission method, which can prevent a UE in a cell of two MBSFN overlapping areas from determining how to configure a physical broadcast channel under the premise of ensuring low complexity of MBMS service transmission. problem.
  • An embodiment of the present invention provides a multimedia broadcast service control data transmission apparatus, which can prevent a UE in a cell of two MBSFN overlapping areas from determining how to configure a physical broadcast channel under the premise of ensuring low complexity of MBMS service transmission. problem.
  • the subframes for carrying the physical broadcast channel P-BCH and the synchronization channel are all transmitted to the mobile terminal UE in a single cell mode.
  • a subframe generating module configured to generate a subframe that carries a physical broadcast channel P-BCH and a synchronization channel
  • the control data sending module is configured to send all the subframes generated by the subframe generating module to the UE in a single cell manner.
  • the MBMS control data transmission method and apparatus of the present invention transmit all the subframes for carrying the physical broadcast channel and the synchronization channel by using a single cell when transmitting the MBMS control data, and can ensure that the transmission is performed.
  • the UE is guaranteed to receive only one physical broadcast channel, which avoids the problem that the UE in the cells of the two MBSFN overlapping areas cannot determine how to configure the physical broadcast channel.
  • By further transmitting the P-MCCH using the subframe it is further avoided that a UE that covers a non-overlapping portion of the overlapped MBSFN area cannot receive a specific MBMS service after receiving the P-MCCH and the S-MCCH. The problem with the data.
  • FIG. 1 is a schematic diagram of a subframe structure of a first MBMS control data transmission method
  • FIG. 2 is a schematic diagram of a subframe structure of a second MBMS control data transmission method
  • FIG. 3 is a third MBMS control data transmission. Schematic diagram of the subframe structure of the method
  • FIG. 4 is a schematic diagram of a typical MBSFN coverage with overlapping scenarios
  • FIG. 5 is a schematic diagram of a subframe structure of an MBMS control data transmission method according to Embodiment 1 of the present invention.
  • FIG. 6 is a schematic structural diagram of a subframe of an MBMS control data transmission method according to Embodiment 2 of the present invention
  • FIG. 7 is a schematic structural diagram of a subframe of an MBMS control data transmission method according to Embodiment 3 of the present invention
  • FIG. 6 is a schematic structural diagram of a subframe of an MBMS control data transmission method according to Embodiment 2 of the present invention
  • FIG. 7 is a schematic structural diagram of a subframe of an MBMS control data transmission method according to Embodiment 3 of the present invention
  • FIG. 8 is a schematic structural diagram of an MBMS control data transmission apparatus according to an embodiment of the present invention. Mode for carrying out the invention
  • the embodiment of the present invention mainly uses the single cell to transmit the subframes for carrying the MBMS broadcast channel and the synchronization channel when transmitting the MBMS control data, so that the UE only receives one under the premise of ensuring low transmission complexity.
  • P-BCH avoids the problem that the UEs in the cells of the two MBSFN overlapping areas cannot determine how to configure the physical broadcast channel.
  • FIG. 5 is a schematic structural diagram of a subframe of an MBMS control data transmission method according to Embodiment 1 of the present invention.
  • subframes for carrying an MBMS physical broadcast channel P-BCH and a synchronization channel are all transmitted by using a single cell;
  • the P-BCH of the OFDM resource in which the existing occupied pilot is located is removed, and only the P-BCH existing in the OFDM resource other than the OFDM resource in which the pilot is located in the subframe is reserved.
  • the purpose of removing the P-BCH of the OFDM symbol in which the existing occupied pilot is located is to further reduce the transmission complexity, and of course it is also possible to remove it.
  • the P-BCH is transmitted in a single cell, and the UE can be guaranteed to receive only one P-BCH, thereby avoiding the problem that the UE in the cell of the two MBSFN overlapping areas cannot determine how to configure the physical broadcast channel.
  • FIG. 6 is a schematic structural diagram of a subframe of an MBMS control data transmission method according to Embodiment 2 of the present invention.
  • the P-MCCH is further carried in the subframe to the UE.
  • the S-MCCH can be sent to the P-MCCH and sent in the subframe sent by the MBSFN.
  • the specific resource location carried by the P-MCCH in the subframe can be determined as needed. Preferably, it is carried in the subframe without other channels occupying
  • the vacant OFDM resources may be carried, for example, in any OFDM resource locations other than the P-BCH, the P-SCH, the S-SCH, and the pilot.
  • the P-MCCH is also transmitted in a single cell, so that the UE can only receive the P-BCH of one MBSFN area, so that the UE that is in a non-overlapping part covering the overlapping MBSFN area receives the P-MCCH and the S- The problem of subsequent MBMS service data cannot be received after MCCH.
  • the MBMS paging channel is further carried by the subframe. Since the MBMS paging channel is transmitted in a single cell manner, only the same cell covered by different MBSFN areas may be received. To an MBMS paging channel, the UE only needs to listen to the one paging channel, thereby avoiding the multiple MBMS paging channels configured in the subframes that are sent by the UE in different MBSFN manners in different MBSFN areas. The situation of monitoring makes the UE monitor more convenient and saves power.
  • the MBMS paging channel is arbitrarily carried in a specific bearer position in the subframe, and is preferably carried in the OFDM resource in the subframe without other channels, for example, can be carried in P-BCH, P-SCH, S- Any idle OFDM resource location other than SCH, P-MCCH and pilot.
  • P-BCH Physical Broadcast Channel
  • P-SCH Physical Broadcast Channel
  • S- Any idle OFDM resource location other than SCH P-MCCH and pilot.
  • the OFDM resources can be used to carry the single-cell MBMS service data (the part marked with MBMS in the figure), and the system resources can be fully utilized.
  • the specific bearer location is arbitrary, and is preferably carried in the OFDM resource in the subframe without other channels, for example, may be carried in P-BCH, P-SCH, S-SCH, P-MCCH, MBMS paging channel and guide. Any idle OFDM resource location other than the frequency.
  • the above P-BCH, P-SCH, S-SCH, P-MCCH, MBMS paging channel, single cell MBMS service data, and specific OFDM resource bits carried by the pilot in the subframe The settings can be arbitrary, and they do not overlap each other.
  • the subframes carrying the MBMS broadcast channel and the synchronization channel are all transmitted by using a single cell, and may also be combined with the specific bearer used for the P-BCH, the P-MCCH, the MBMS paging channel, or the single-cell MBMS service data. In this way, various embodiments can be combined, and will not be mentioned here.
  • the above embodiment is an embodiment in the case where the subframe uses a subcarrier spacing of 15 KHz.
  • the MBMS system adopts the subframe structure, but the inventive idea of the embodiment of the present invention is adopted regardless of the subframe structure.
  • the specific OFDM resources in the subframe can be allocated as shown in Figure 7.
  • FIG. 7 is a schematic structural diagram of a subframe of an MBMS control data transmission method according to Embodiment 3 of the present invention.
  • OFDM resources are small, in order to ensure sufficient channel resources, S-SCH and part of P-BCH may need to occupy part.
  • the OFDM resources in which the pilots are located, the other parts are similar to the 15 KHz subcarrier spacing, and are not mentioned here.
  • FIG. 8 is a schematic structural diagram of an MBMS control data transmission apparatus according to an embodiment of the present invention. As shown in FIG. 8, the apparatus includes:
  • a subframe generating module 801 configured to generate a subframe that carries an MBMS broadcast channel and a synchronization channel
  • the subframe sending module 802 is configured to send all the subframes generated by the subframe generating module 801 to the UE in a single cell manner.
  • the subframe generation module 801 may further include a broadcast channel bearer unit 803, configured to carry the physical broadcast channel in the spare OFDM resources other than the OFDM resources occupied by the pilots in the subframe, and further reduce the complexity.
  • a broadcast channel bearer unit 803 configured to carry the physical broadcast channel in the spare OFDM resources other than the OFDM resources occupied by the pilots in the subframe, and further reduce the complexity.
  • the subframe generation module 801 may further include a primary control channel bearer unit 804, configured to carry the P-MCCH in the subframe, preferably in a spare OFDM resource that is not occupied by other channels, thereby avoiding coverage in one coverage.
  • a primary control channel bearer unit 804 configured to carry the P-MCCH in the subframe, preferably in a spare OFDM resource that is not occupied by other channels, thereby avoiding coverage in one coverage.
  • Non-overlapping portions of overlapping MBSFN regions The UE that fails to receive the specific MBMS service data after receiving the P-MCCH and the S-MCCH, and further reduces the complexity of transmitting the MBMS control data by the system under different MBSFN area coverage.
  • the subframe generating module 801 may further include a paging channel bearer unit 805, configured to carry the MBMS paging channel in the subframe, preferably in the spare OFDM resource occupied by other channels, thereby avoiding different MBSFNs.
  • a paging channel bearer unit 805 configured to carry the MBMS paging channel in the subframe, preferably in the spare OFDM resource occupied by other channels, thereby avoiding different MBSFNs.
  • multiple MBMS paging channels are configured for the MBSFN area in the subframe where the MBSFN is located, so that the UE can conveniently monitor and save power.
  • the subframe generating module 801 may further include a single cell service bearer unit 806, configured to carry the single cell MBMS service data in the subframe, preferably in the spare OFDM resource occupied by other channels, and fully utilize system resource.
  • a single cell service bearer unit 806, configured to carry the single cell MBMS service data in the subframe, preferably in the spare OFDM resource occupied by other channels, and fully utilize system resource.
  • the subframe generated by the subframe generation module 801 may be a subframe of 15 KHz subcarrier spacing, or may be a subframe of 7.5 KHz subcarrier spacing.
  • the device can be set in a device such as a base station.
  • the MBMS control data transmitting method and apparatus of the present invention transmit all the subframes for carrying the MBMS broadcast channel and the synchronization channel in a single cell when transmitting the MBMS control data, and ensure transmission complexity.
  • the problem that the UE in the cells of the two MBSFN overlapping areas cannot determine how to configure the physical broadcast channel is avoided.
  • By further transmitting the P-MCCH using the subframe it is further avoided that a UE that covers a non-overlapping portion of the overlapped MBSFN area cannot receive a specific MBMS service after receiving the P-MCCH and the S-MCCH.
  • Data problem lower The complexity of transmitting MBMS control data by the system under different MBSFN area coverage.
  • the system resources can be further utilized to increase the transmission efficiency of the MBMS system.

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

Abstract

La présente invention concerne un dispositif et un procédé permettant de transmettre Des données de commande de service MBMS (Multimedia Broadcast and Multicast Service - service de multidiffusion et de diffusion multimédia). Lors de la transmission des données de commande  MBMS, le dispositif et le procédé de l'invention transmettent la totalité des sous-trames qui sont utilisées pour porter le canal de diffusion physique et le canal de synchronisation avec la cellule unique, de telle sorte que l'UE reçoive un canal de diffusion physique seulement. On évite ainsi le problème rencontré par l'équipement utilisateur (UE) qui se trouve dans les cellules de la zone en chevauchement de deux réseaux MBSFN (Multimedia Broadcast Single Frequency Networks – réseaux à fréquence unique de diffusion multimédia), qui ne peut pas déterminer comment configurer le canal de diffusion physique quand la complexité de la transmission inférieure est assurée. D'autre part, en transmettant également le P-MCCH avec la sous-trame, on évite également le problème rencontré par l’UE qui se trouve dans la zone de non-chevauchement de la partie avec la zone MBSFN en chevauchement et qui ne peut pas recevoir les données de service MBMS concrètes après la réception du P-MCCH et du S-MCCH.
PCT/CN2009/071128 2008-04-01 2009-04-01 Dispositif et procédé permettant de transmettre les données de commande de service mbms Ceased WO2009121300A1 (fr)

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KR1020107024577A KR101162190B1 (ko) 2008-04-01 2009-04-01 멀티미디어 방송 서비스 제어 데이터 전송 방법 및 장치

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CN2008101032019A CN101552950B (zh) 2008-04-01 2008-04-01 多媒体广播业务控制数据传输方法及装置
CN200810103201.9 2008-04-01

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CN102075233B (zh) * 2009-11-24 2016-03-23 电信科学技术研究院 一种控制信息收发方法及设备
CN102118693B (zh) * 2009-12-31 2015-06-24 中兴通讯股份有限公司 多播控制信道更新指示信息的发送方法及装置
CN102158807B (zh) 2010-02-11 2015-01-28 中兴通讯股份有限公司 Mcch通知信息的监听方法及装置、用户设备
CN102158808B (zh) * 2010-02-11 2016-03-30 中兴通讯股份有限公司 Mcch信息的接收方法及装置、用户设备
CN102264033B (zh) * 2010-05-27 2015-06-03 中兴通讯股份有限公司 一种mbms统计消息的处理方法和装置
CN103856901B (zh) * 2012-12-04 2017-06-09 成都鼎桥通信技术有限公司 Mbms业务数据的发送方法
EP2958362B1 (fr) * 2013-02-14 2018-11-28 LG Electronics Inc. Procédé pour rendre compte d'information mbms dans un système de radiocommunications, et dispositif conçu à cet effet
EP2869607B1 (fr) * 2013-11-01 2019-12-25 Alcatel Lucent Système de communication sans fil, procédé, équipement utilisateur, noeud et programme informatique
WO2016208897A1 (fr) 2015-06-22 2016-12-29 엘지전자 주식회사 Procédé de transmission de canal de liaison montante et dispositif nb-ido

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