WO2011022958A1 - 一种传输动态调度信息的方法及系统 - Google Patents

一种传输动态调度信息的方法及系统 Download PDF

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Publication number
WO2011022958A1
WO2011022958A1 PCT/CN2010/070403 CN2010070403W WO2011022958A1 WO 2011022958 A1 WO2011022958 A1 WO 2011022958A1 CN 2010070403 W CN2010070403 W CN 2010070403W WO 2011022958 A1 WO2011022958 A1 WO 2011022958A1
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WO
WIPO (PCT)
Prior art keywords
dsis
mch
network side
dsi
mbsfn
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PCT/CN2010/070403
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English (en)
French (fr)
Inventor
胡剑
艾建勋
马子江
毛磊
王斌
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中兴通讯股份有限公司
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.)
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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 EP10811124.6A priority Critical patent/EP2472974B1/en
Priority to US13/260,251 priority patent/US9094938B2/en
Publication of WO2011022958A1 publication Critical patent/WO2011022958A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60Network streaming of media packets
    • H04L65/61Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
    • H04L65/611Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio for multicast or broadcast
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/30Resource management for broadcast services
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/23Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to an LTE (Long Term Evolution) system, and in particular, to a method and system for transmitting dynamic scheduling information.
  • LTE Long Term Evolution
  • MBMS Multimedia Broadcast Multicast Service
  • 3GPP 3rd Generation Partnership Project
  • MBMS Multimedia Broadcast Multicast Service
  • MBMS defined by 3GPP can not only realize plain text low-rate message class multicast and broadcast, but also realize high-speed multimedia service broadcast and multicast, providing a variety of rich video, audio and multimedia services, which undoubtedly conforms to future mobile
  • the trend of data development provides a better business prospect for the development of 3G.
  • the MBMS service can adopt the multicast mode, which is called the MBSFN (Multicast/Broadcast over Single Frequency Network) transmission mode, and the MBMS service transmitted in the multicast mode, also called MBSFN.
  • MBSFN Multicast/Broadcast over Single Frequency Network
  • the same modulated post-coding format can be used in multiple cells, and the same physical resource is used to transmit the same content.
  • the characteristics of the MBMS cell transmission are as follows:
  • MBSFN synchronous transmission in the MBSFN area; 2) support multi-cell MBMS transmission and combining; 3) MTCH (Multicast Traffic Channel) and MCCH (Multicast) Control Channel, multicast control channel) is mapped to MCH (Multicast Channel) in -Tm (oint to multipoint) mode; 4) MBSFN synchronization area, MBSFN area, MBSFN transmission, advertisement,
  • the reserved cells are semi-statically configured by operation and maintenance.
  • the UE (User equipment) of the multiple cells can receive multiple MBMS data with the same content and perform SFN (Single Frequent Network) merging, thereby improving the gain of the received signal.
  • a plurality of cells that use the same physical resource and transmit the same MBMS service in the MBSFN transmission mode constitute an MBSFN area.
  • MBSFN MBSFN Service Group
  • An MBSFN area includes multiple cells, and each cell is configured with an identical MBSFN service group.
  • the data channel MTCH of multiple MBSFN services having the same MBSFN area, and the control channel of the MBSFN service MCCH can be multiplexed into one MCH (Multicast Channel).
  • MCH Multicast Channel
  • the MCH is a transport channel, which is characterized by point-to-multipoint transmission.
  • the corresponding physical resource is the multicast resource allocated by the system for transmitting the MBMS service (MTCH).
  • the MCH is carried on some multicast resources, including several MBSFN frames and MBSFN.
  • denotes a non-MBSFN frame (non-MBSFN frame)
  • U denotes an MBSFN frame (MBSFN frame)
  • denotes an MBSFN subframe (MBSFN subframe)
  • indicates that it is not used.
  • These multicast resources are configured by using a set of MSAP (MBSFN subframe allocation pattern), including a radio frame allocation mode and a radio subframe allocation mode, and the multicast resources of each MBSFN area can be in units of subframes. Divided into groups according to a certain pattern, each group can constitute one MCH, or multiple groups form one MCH.
  • each MCH configuration is called the MSAP of the MCH, and the MSAP describes the physical resources of an MCH channel.
  • Each cell may have one or more MCHs, each MCH uniquely corresponding to one MSAP, and uniquely belongs to one MBSFN area, but each MBSFN area may have one or more MCHs, each MCH
  • the configured multicast resource is configured by configuring a set of MSAPs for each MCH.
  • multiple MTCHs carried on each MCH may adopt a dynamic scheduling method, and two or more MTCHs may be multiplexed in the same MBSFN sub-time through dynamic scheduling.
  • the frame occupies part of the resources of the subframe.
  • Figure 2 (a), Figure 2 (b), and Figure 2 (c) are Scheduling Period 1 , Scheduling Period 2, Scheduling Period, respectively. Schematic diagram of resource allocation for 3 (scheduling cycle 3).
  • an MSAP occasion is introduced in the MSAP concept, which indicates a scheduling period (that is, a period of a radio interface, and multiple services sequentially sequence MBSFN subframe scheduling resources included in the scheduling period. All MMSs corresponding to an MSAP in the time period of the uplink transmission include all multicast resources.
  • Multiple MTCHs and dynamic scheduling information (DSI, also referred to as scheduling information in the present invention) can be transmitted in one MSAP occasion.
  • the dynamic scheduling information refers to information about specific location information of a service in a scheduling period.
  • the dynamic scheduling information may be sent in a scheduling period, or may be sent in one or several scheduling periods before a scheduling period. Generally, scheduling information should be indicated in the scheduling period.
  • the service data in the scheduling period and the MCCH are sent to the UE before being sent, and the scheduling information may be carried on a MAC (Medium Access Control) control unit (MAC control element).
  • MAC control element Medium Access Control
  • the length of the MSAP occasion is generally fixed at 320ms.
  • the length of the MSAP occasion is 40ms, 80ms, 160ms, 320ms, 640ms, 1280ms, etc.
  • the length of an MSAP occasion is a scheduling period, also called a scheduling period.
  • One MCH allocates one or more MBSFN subframes in one or more MBSFN frames through the MSAP, where a subframe transmitted in the multicast mode is referred to as an MBSFN subframe, and a frame containing an MBSFN subframe is referred to as an MBSFN frame.
  • Each MCH has its own scheduling period, which can also be called an MSAP occasion.
  • the scheduling period of each MCH may be the same or different.
  • each MCH has a schedule block carrying its dynamic scheduling information DSI as shown in FIG. 2, and generally the DSI is carried on the MAC SDU (Service Data Unit), and is configured in The front of its scheduled MCH is shown in Figure 3.
  • DSI dynamic scheduling information
  • MAC SDU Service Data Unit
  • the scheduling information is carried on each MSAP occasion configured on an MCH. Mapping information of the MTCH to the MSAP subframe. The mapping information is determined by the MBSFN subframe number index relationship in one scheduling period. The UE reads the scheduling information to know which MBSFN subframes each MTCH is allocated. The UE can read the MTCH of its interest in the corresponding MBSFN subframe, and ignore the MBSFN subframe that it does not need to read, thereby improving the MBMS service receiving efficiency of the UE and saving the power consumption of the UE.
  • the MBSFN subframe number described herein is determined such that all MBSFN subframes allocated by one MCH in one scheduling period are sequentially arranged and numbered sequentially. For example, the total number of MBSFN subframes allocated by the MCH channel in one cycle is 100, and the subframe number is from 0 to 99, or 1 to 100.
  • multiple transport channels multiplex the MCH channel in the following manner:
  • One subframe corresponds to one TTI (Transmission Time Interval), and one output data block can be sent in one TTI, corresponding to one MAC.
  • PDU Media Access Control Layer Protocol Data Unit
  • multiple MAC SDUs and MAC CEs may be included, and these MAC SDUs may be from different logical channels, and possible logical channels include MTCH, MCCH, MSCH, etc.
  • MAC CE may Carry dynamic scheduling information. These data from different logical channels are sent together on the physical channel after being concatenated together in the MAC PDU.
  • the MAC PDU In order to distinguish the MAC SDUs from different logical channels, the MAC PDU carries the identification information, specifically, the identifier of the logical channel, the location information of the data block of the logical channel in the MAC PDU, etc., for the receiver to distinguish different logical channels. Data block.
  • MCHs As the area of the MBMS service is different, there may be multiple MCHs in a certain cell, which respectively carry services belonging to different MBMS service areas. In addition, an MBSFN area is different due to different QoS (Quality of Service) attributes of the service. It is also possible to configure multiple MCHs, each of which is configured with a different MCS (Modulation Coding Scheme), which carries MBMS services with different QoS requirements, and also includes MCCH and DSI with special QoS requirements. In the scenario where there are multiple MCHs, how to send scheduling information and select the corresponding MCS needs to be designed.
  • MCS Modulation Coding Scheme
  • the technical problem to be solved by the present invention is to provide a method and system for transmitting dynamic scheduling information, which is used to indicate user equipment (UE) service scheduling information, and is applicable to a scenario in which multiple MCHs exist in the system.
  • the present invention provides a method for transmitting dynamic scheduling information, including: a multimedia broadcast carried on a plurality of multicast channels (MCH) in a single frequency network multicast broadcast (MBSFN) area by a network side
  • MCH multicast channels
  • MMSFN single frequency network multicast broadcast
  • DSI dynamic scheduling information of the multicast service
  • the step of the network side transmitting the multiple DSIs on one MCH includes: the network side placing the multiple DSIs together and transmitting them on one MCH; or
  • the network side combines the multiple DSIs into one DSI and then carries them on one MCH.
  • the network side may send the MCH at a scheduling period of each MCH itself.
  • the method further includes:
  • the network side allocates MBSFN subframe resources to the multiple MCHs of the MBSFN area, where the allocation period is the longest scheduling period in the scheduling period of all MCHs of the MBSFN area, or all MCHs of the MBSFN area The least common multiple of the scheduling period.
  • the step of the network side carrying multiple DSIs on one MCH is: the network side carries the multiple DSIs that are placed together or the DSIs that are combined into one is carried in one or more of the one MCHs.
  • the medium is accessed in the Medium Access Control Control Unit (MAC CE) on the MBSFN subframe.
  • MAC CE Medium Access Control Control Unit
  • the method further includes:
  • the network side carries the multiple DSIs that are placed together or the DSIs that are combined into one into the same or different MBSFN subframes as the DSI and the Multicast Control Channel (MCCH);
  • MCCH Multicast Control Channel
  • the network side uses the modulation coding scheme (MCS) of the MCCH as the Multiple DSIs placed together or MCS of the DSIs combined into one; or
  • the network side determines the multiple placements in one of the following manners. DSI or MCS of the DSI merged into one:
  • the MCS of the MCCH is taken as the MCS of the DSIs that are placed together or the DSIs that are combined into one.
  • the method further includes:
  • the user equipment When the user equipment needs to receive the MBMS service, the user equipment reads the MBMS service carried in each MCH in the MBSFN area on the MCH channel that carries the multiple DSIs that are placed together or the DSIs that are combined into one.
  • the scheduling information is used to receive MBMS services carried on different MCHs according to the read scheduling information.
  • the present invention also provides a network side device supporting a system for transmitting dynamic scheduling information, the network side device being configured to carry multiple multicast channels (MCH) in a single frequency network multicast broadcast (MBSFN) area.
  • MCH multicast channels
  • MCSFN single frequency network multicast broadcast
  • DSI dynamic scheduling information of the Multimedia Broadcast and Multicast Service (MBMS) service is carried on an MCH;
  • the network side device sends the multiple DSIs together and sends them on one MCH or combines the multiple DSIs into one DSI and then carries them on one MCH.
  • the network side device may be a DSI that sends the MCH at a scheduling period of each MCH itself.
  • the network side device may also be a unified scheduling week of all MCHs in the MBSFN area. Transmitting a plurality of DSIs that are placed together or the DSIs that are combined into one; wherein the unified scheduling period is the shortest scheduling period of all MCH scheduling periods of the MBSFN area, or is the MBSFN area The greatest common divisor of the scheduling period of all MCHs.
  • the network side device is further configured to allocate MBSFN subframe resources for the multiple MCHs of the MBSFN area, where the allocation period is the longest scheduling period of all MCH scheduling periods of the MBSFN area, or the MBSFN The least common multiple of the scheduling period of all MCHs of the zone.
  • the network side device may be configured to send the multiple DSIs that are placed together or the DSIs that are combined into one to be carried in a MAC CE on one or more MBSFN subframes of one MCH.
  • the network side device is further configured to:
  • the MCCH is carried on the same or different MBSFN subframes
  • the MCS of the MCCH is used as the multiple DSIs or stations that are placed together Said to merge into one DSI MCS;
  • the MCS of the MCCH is taken as the MCS of the DSIs that are placed together or the DSIs that are combined into one.
  • the present invention also provides a system for transmitting dynamic scheduling information, which includes the network side device as described above, and a user equipment;
  • the user equipment is configured to: when the MBMS service needs to be received, read scheduling information of the MBMS service carried in each MCH in the MBSFN area on the MCH that carries the scheduling information, according to the read scheduling The information is connected to the MBMS service carried on different MCHs. Received.
  • the technical solution of the present invention provides a transmission scheme of dynamic scheduling information of an MBMS service in a scenario of multiple MCHs, so that the receiving end can accurately obtain specific location information of the MBMS service to be received in a scheduling period.
  • the dynamic scheduling information of the MBMS services can be obtained at one time, thereby preventing the UE from reading the distributed dynamic scheduling information multiple times, saving the UE power, improving the receiving efficiency, and having High wireless interface signaling efficiency.
  • 1 is a schematic diagram of multicast resources allocated by an MSAP occasion of an MCH in the prior art
  • Figure 2 (a) is a schematic diagram of resource allocation for Scheduling Period 1;
  • Figure 2 (b) is a schematic diagram of resource allocation for Scheduling Period 2;
  • Figure 2 (c) is Scheduling Period 3 (scheduling period) 3) Schematic diagram of resource allocation;
  • FIG. 3 is a schematic diagram of configuration of dynamic scheduling information of multiple MCHs in the prior art;
  • FIG. 4 is a schematic diagram showing a unified configuration of dynamic scheduling information of multiple MCHs in the present invention.
  • Figure 5 is a schematic diagram of unified transmission of DSI in the present invention. Preferred embodiment of the invention
  • Embodiment 1 A method for transmitting dynamic scheduling information includes:
  • the network side carries the dynamic scheduling information (DSI, also referred to as scheduling information in the present invention) of the MBMS service carried in the multiple MCHs in the MBSFN area on one MCH.
  • DSI dynamic scheduling information
  • the multiple DSIs (the dynamic scheduling information corresponding to one MCH of each DSI) are carried on one MCH, and the multiple DSIs are uniformly placed together and carried on one MCH.
  • Sending; multiple DSIs that are uniformly placed together are simply referred to as DSI-a, DSI-a is still substantially multiple DSIs, each of which corresponds to the content of the dynamic scheduling information of the respective MCH.
  • the sending of the multiple DSIs on one MCH may also be performed by combining a plurality of the DSIs into one DSI and transmitting them on one MCH.
  • the DSI is called DSI-b; the DSI-b is essentially a DSI, and its content includes the contents of the original multiple DSIs, that is: DSI-b includes dynamic scheduling information of MBMS services carried on all MCHs of the MBSFN area.
  • An MBSFN area may have one or more MCHs, but there is only one DSI (DSI-b) in this MBSFN area, and this DSI-b includes dynamic scheduling information of all MBMS services on all MCHs of the MBSFN area.
  • the DSI-a and the DSI-b are collectively referred to as DSI-t, and the DSI-t refers to one or more DSIs that are transmitted on one MCH.
  • MCHs in one MBSFN area There are multiple MCHs in one MBSFN area, numbered 1 , 2, ..., N, N is one
  • Each MCH has a Scheduling period, also known as MSAP occasion.
  • DSI scheduling information
  • MCHn DSIn
  • the network side sends the DSI of the MCH in the scheduling period of each MCH. Since the scheduling period of each MCH is different, the number of DSIs corresponding to each MCH in DSI-a may be different.
  • the network side when the DSI is sent in the DSI-b mode, the network side also sends the DSI of the MCH in the scheduling period of each MCH.
  • the scheduling period of each MCH is different, so the DSI in the DSI-b.
  • the content may be different, that is to say, there is only scheduling information of the scheduled MCH in DSI-b.
  • the scheduling period and the unified scheduling period may also be the greatest common divisors of the scheduling periods of all MCHs. For example, there are five MCHs in an MBSFN area.
  • the scheduling periods of the MCHs are 160ms, 320ms, 640ms, 320ms, and 160ms, respectively.
  • the unified scheduling period of all MCHs in the MBSFN area is 160ms.
  • the network side is in an MBSFN area.
  • the DSI-t is sent on a uniform scheduling period of all MCHs.
  • the maximum value of the MCH scheduling periods is periodic to allocate the MBSFN subframe resources, and the allocation period is max ⁇ SP1, SP2, ....SPn ⁇ , where SPn is the scheduling period of the nth MCH, and the allocation period It can also be the least common multiple of all MCH scheduling periods, as shown in Figure 5.
  • the network side sends the DSI-t bearer on one or more MBSFN subframes.
  • DSI-a or DSI-b uses the same MCS, that is, one or more MBSFN subframes carrying DSI-a or DSI-b use the same MCS.
  • the network side carries the DSI-t and the MCCH in the same or different
  • the network side uses the MCS of the MCCH as the MCS of the DSI-t;
  • the network side determines the MCS of the DSI-t in one of the following ways:
  • the network side selects the corresponding MCS for the DSI-t by the above method.
  • the method further includes:
  • the UE When the UE needs to receive the MBMS service, the UE reads the scheduling information of the MBMS service carried in each MCH in the MBSFN area on the MCH channel carrying the DSI-t, and performs the bearer on the different MCH according to the read scheduling information.
  • the MBMS service is received.
  • the UE and the network side device may agree or default on which MCH channel to carry the DSI-t.
  • the same one is used.
  • this MCS can be obtained by reading the MCS of the MCCH on the system broadcast message; when the DSI-t is not multiplexed with the MCCH on one MCH, the MCS of the DSI-t can be read by Obtaining the MCS of the MCH carrying the DSI-t on the MTCH to obtain;
  • the MCS of DSI-t can be obtained by reading the MCS or the MCS carrying the DSI-t on the system broadcast message.
  • the network side is required to configure an MCS for DSI-t in the MCCH content or in the system broadcast message.
  • the MCS of the DSI-t can also be obtained by reading the MCS of the MCCH on the system broadcast message, and the DSI-t is the same as the MCS of the MCCH, regardless of the two. Whether it is carried on a MCH.
  • FIG. 4 An application example of transmitting dynamic scheduling information is described below with reference to FIG. 4.
  • the application example is shown in FIG. 4.
  • an MBSFN area has four MCHs for carrying MBMS, namely MCH1, MCH2, ... MCH4.
  • One of the MCHs carries DSI-t, and can also carry MCCH and MTCHs.
  • the scheduling period of each MCH is 160ms, 160ms, 320ms, and 640ms, corresponding to MCHl, MCH2, ... MCH4, respectively.
  • the unified scheduling period of the MCH is 160 ms, that is, the unified scheduling period is the minimum or maximum common divisor of all MCH scheduling periods.
  • the allocation period of the four MCHs is 640 ms, that is, the allocation period is the maximum value or the least common multiple of all MCH scheduling periods.
  • the 640ms allocation period includes four unified scheduling periods, as shown in FIG.
  • the network side device uniformly carries the scheduling information DSI-t of the MBMS service carried by each MCH in an MBSFN area on one MCH in each of the unified scheduling periods.
  • the DSI-t content has scheduling information of MCH1 and MCH2 in four unified scheduling periods (160ms), and four MCHs are used on the DSI-t of the first unified scheduling period (160ms).
  • Scheduling information content only the scheduling information content of MCH1 and MCH2 in the second unified scheduling period (160ms), and the scheduling information content of MCH1, MCH2 and MCH3 in the third unified scheduling period (160ms), in the fourth
  • These four unified scheduling periods (160ms) form an allocation period, as shown in Figure 5.
  • MCH1 and MCH2 are scheduled 4 times in the 640ms allocation period, while MCH3 is scheduled 2 times, and MCH4 is scheduled only once.
  • the MCCH is carried, the MCCH is carried before the DSI-t. If the MTCHs are carried, Then the MTCHs are carried after the DSI-t.
  • the DSI-t is carried on one or more MBSFN subframes, and the network side selects a corresponding MCS for the DSI-t, if it is carried in one of the subframes, for example, the first subframe also carries the MCCH, Then, the MCS of the DSI-t is the same as the MCS of the MCCH, and the MCS, that is, the MCS of the MCCH is configured on the system broadcast message; if there is no MCCH on the one or more MBSFN subframes carrying the DSI-t, the DSI-t MCS uses the MCS of the MCH multiplexed with the MTCH.
  • This MCS is configured in the MCCH content, that is, the MCS of all MCHs is configured on the MCCH, and the MCS of the DSI-t uses the content of one MCH, or DSI-t.
  • the MCS of the MCCH is still used, or the DSI-t uses the system broadcast message or the MCS configured by the MCCH.
  • the UE When the UE needs to receive the MBMS service, the UE reads the scheduling information of the MBMS service of each MCH in the MBSFN area on the MCH channel that carries the DSI-t, and the channel information is different according to the read scheduling information.
  • the MBMS service on the MCH is received.
  • the UE can obtain the MCCH of the MCCH in advance by reading the system broadcast message. In turn, the UE can know the same MCS that DSI-t uses. If the subframe carrying DSI-t also carries one MTCH or multiple MTCHs (multiple MTCHs, MTCHs), then the MTCH or the MTCH also uses the MCS.
  • the UE may obtain the MCS of the MCH carrying the DSI-t in advance by reading the content of the MCCH, or the UE still reads the system.
  • the MCS of the MCCH is broadcasted on the message, or the UE reads the system broadcast message or the MCCH content to obtain the MCS of the DSI-t, and the UE can know the MCS used by the DSI-t.
  • the unified scheduling period and the allocation period are also equal to the scheduling period.
  • the DSI-t on each unified scheduling period includes dynamic scheduling information for all MCHs.
  • Embodiment 2 A system for transmitting dynamic scheduling information includes:
  • the network side device is configured to carry scheduling information of the MBMS service carried by each MCH in an MBSFN area on one MCH.
  • the UE is configured to: when the MBMS service needs to be received, read the scheduling information of the MBMS service carried in each MCH in the MBSFN area on the MCH that carries the scheduling information, and the scheduling information is different according to the read scheduling information.
  • the MBMS service carried on the MCH is received.
  • Embodiment 3 a network side device supporting a system for transmitting dynamic scheduling information
  • the network side device is configured to carry scheduling information of the MBMS service carried by each MCH in an MBSFN area on an MCH.
  • the technical solution of the present invention provides a transmission scheme of dynamic scheduling information of an MBMS service in a scenario of multiple MCHs, so that the receiving end can accurately obtain specific location information of the MBMS service to be received in a scheduling period.
  • the dynamic scheduling information of the MBMS services can be obtained at one time, thereby preventing the UE from reading the distributed dynamic scheduling information multiple times, saving the UE power, improving the receiving efficiency, and having High wireless interface signaling efficiency.

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Description

一种传输动态调度信息的方法及系统
技术领域
本发明涉及 LTE ( Long Term Evolution, 长期演进 )系统 , 特别涉及一种 传输动态调度信息的方法及系统。
背景技术
随着 Internet的迅猛发展和大屏幕多功能手机的普及,出现了大量移动数 据多媒体业务和各种高带宽多媒体业务, 例如, 视频会议、 电视广播、 视频 点播、 广告、 网上教育、 互动游戏等, 这一方面满足了移动用户不断上升的 业务需求, 同时也为移动运营商带来新的业务增长点。 这些移动数据多媒体 业务要求多个用户能够同时接收相同数据, 与一般的数据业务相比, 具有数 据量大、 持续时间长、 时延敏感等特点。
为了有效地利用移动网络资源, 第三代合作伙伴计划 (3rd Generation Partnership Project, 简称为 3GPP )提出了多媒体广播和组播业务( Multimedia Broadcast Multicast Service, 简称为 MBMS ) , 该业务是一种从一个数据源向 多个目标传送数据的技术, 实现了网络(包括核心网和接入网 )资源的共享, 提高了网络资源 (尤其是空中接口资源) 的利用率。 3GPP定义的 MBMS不 仅能够实现纯文本低速率的消息类组播和广播, 而且还能够实现高速多媒体 业务的广播和组播, 提供多种丰富的视频、 音频和多媒体业务, 这无疑顺应 了未来移动数据发展的趋势, 为 3G的发展提供了更好的业务前景。
在 LTE 中, MBMS 业务可以釆用多播模式方式, 称为 MBSFN ( Multicast/Broadcast over Single Frequency Network, 单频网多播广播)发送 模式, 釆用多播模式发送的 MBMS业务, 也称为 MBSFN业务, 可以在多个 小区釆用相同的调制后编码格式,釆用相同的物理资源发送相同内容, MBMS 小区传输的特征如下:
1 )在 MBSFN 区域内同步传输; 2 ) 支持多小区 MBMS传输合并; 3 ) MTCH ( Multicast traffic Channel , 多播业务信道) 和 MCCH ( Multicast Control Channel, 多播控制信道 )在 -T-m ( oint to multipoint, 点到多点 ) 模式下映射到 MCH ( Multicast Channel, 多播信道)上; 4) MBSFN 同步区 域、 MBSFN 区域、 MBSFN传输、 广告、 保留小区, 均由操作维护半静态 配置。
这样多个小区的 UE ( User equipment, 用户设备)可以接收到多个内容 相同的 MBMS数据并进行 SFN ( Single Frequent Network, 单频网)合并, 从 而可以提高接收信号的增益。 釆用相同的物理资源并以 MBSFN发送模式发 送相同 MBMS业务的多个小区构成了一个 MBSFN区域。
在实际的 LTE组网中, 一个 MBSFN区域上有若干个 MBSFN业务, 这 些属于同一个 MBSFN区域的所有 MBSFN业务称为一个 MBSFN业务组,也 就是说一个 MBSFN业务组仅属于一个 MBSFN区域。一个 MBSFN区域包括 多个小区, 每个小区都配置了完全相同的一个 MBSFN业务组。 具备相同的 MBSFN区域的多个 MBSFN业务的数据信道 MTCH, 以及 MBSFN业务的控 制信道 MCCH可以复用到一条 MCH ( Multicast Channel, 多播信道) 。 相同 MBSFN区域的 MCCH和多个 MTCH, 即多条逻辑信道可以映射到同一传输 信道 MCH上
在 LTE系统中, MCH是传输信道, 特点是进行点到多点的传输, 对应 的物理资源是系统为传输 MBMS 业务(MTCH ) 所分配的多播资源, 一条
MCH承载在一些多播资源上,这些多播资源包括若干个 MBSFN帧和 MBSFN
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子帧上, 如图 1所示, ^表示非 MBSFN frame (非 MBSFN帧) , U表示 MBSFN frame ( MBSFN帧), 表示非 MBSFN subframe (非 MBSFN子帧), □表示 MBSFN subframe ( MBSFN子帧) , δ表示固定不用的。 这些多播资源 釆用一套 MSAP ( MBSFN subframe allocation pattern, MBSFN子帧分配图样) 来配置, 包括无线帧分配模式和无线子帧分配模式, 每个 MBSFN区域的多 播资源可以以子帧为单位按照一定的图样分成多个组, 每个组可以构成一个 MCH, 或者多个组构成一个 MCH。 那么每个 MCH构成时所使用的图样就叫 做该 MCH的 MSAP,—个 MSAP描述一个 MCH信道的物理资源。每个小区 可以有一个或多个 MCH, 每个 MCH都唯一对应一个 MSAP, 且唯一属于一 个 MBSFN区域, 但每个 MBSFN区域可以有一个或多个 MCH, 每个 MCH 所配置的多播资源的配置方法是为每个 MCH都配置一套 MSAP。 如图 2所示, 为了提高 MTCH的发送效率, 每个 MCH上承载的多个 MTCH可以釆用动态调度的方法, 通过动态调度可以将 2个或 2个以上的 MTCH复用在同一个 MBSFN子帧上并占用该子帧的部分资源, 图 2 ( a ) 、 图 2 ( b )以及图 2 ( c )分别为 Scheduling Period 1 (调度周期 1 ) 、 Scheduling Period 2 (调度周期 2 ) 、 Scheduling Period 3 (调度周期 3 ) 的资源分配示意 图。 现有公开技术中, 在 MSAP概念中同时引入 MSAP occasion ( MSAP 时 机) , 其指示了一个调度周期 (即无线接口的一段时间, 多个业务依次按照 顺序在调度周期内包含的 MBSFN子帧调度资源上发送) 的时间段内某个 MSAP所对应的一条 MCH所包括全部多播资源。在一个 MSAP occasion中可 以发送多个 MTCH 和这些 MTCH 的动态调度信息 (Dynamic scheduling information, DSI, 在本发明中也简称为调度信息) 。 动态调度信息指调度周 期内业务的具体的位置信息的信息, 动态调度信息可在调度周期内发送, 或 者在调度周期的前一个或几个调度周期内发送, 一般, 调度信息应该在其指 示的调度周期内的业务数据以及 MCCH发送之前发送给 UE, , 并且调度信 息可以承载在 MAC ( Medium Access Control,介质访问控制)控制单元( MAC control element )上。 MSAP occasion长度一般固定为 320ms。 同样地, 一个 调度周期一般固定为 320ms, 也可以是 2n x 320ms ( n=-3 , -2, -1 , 0, 1 , 2, 3 , 4..... N ) ,相应地, MSAP occasion时间长度为 40ms, 80ms, 160ms, 320ms, 640ms, 1280ms等等, 一个 MSAP occasion时间长度就是一个调度周期, 也 称为一个调度周期。 一条 MCH通过 MSAP分配了一个或多个 MBSFN帧中 的一个或多个 MBSFN子帧, 其中釆用多播模式发送的子帧称为 MBSFN子 帧,含有 MBSFN子帧的帧称为 MBSFN帧。 一个 MBSFN区域有多条 MCH, 每条 MCH都有各自的调度周期 (scheduling period ) , 也可以称为 MSAP occasion, 每条 MCH的调度周期可以相同也可以不相同。
在现有技术中, 每个 MCH都有一个如图 2中所示的承载了其动态调度 信息 DSI的调度块(schedule block ) , 一般地 DSI承载在 MAC SDU (服务 数据单元)上, 配置在其调度的 MCH的前面, 如图 3所示。
在一条 MCH所配置的每个 MSAP occasion上承载了调度信息, 携带 MTCH到 MSAP子帧的映射信息, 这种映射信息借助于在一个调度周期内的 MBSFN子帧编号索引关系确定的, UE读取调度信息可以知道每个 MTCH被 分配在哪些 MBSFN子帧上。 UE可以在相应的 MBSFN子帧上读取其感兴趣 的 MTCH, 而忽略它不需要读取的 MBSFN子帧 , 从而提高 UE的 MBMS业 务接收效率,节省 UE的电能消耗。此处所述的 MBSFN子帧编号是这样确定 的:将一个 MCH在一个调度周期内所分配的所有 MBSFN子帧按照顺序排列 , 依次编号。例如 MCH信道在一个周期内分配的 MBSFN子帧数目总量为 100, 则子帧编号从 0到 99, 或者 1到 100。
在现有 LTE技术中, 多个传输信道通过如下的方式复用 MCH信道: 一 个子帧对应一个 TTI ( Transmission Time Interval, 传输时间间隔) , 在一个 TTI内可以发送一个输出数据块,对应一个 MAC PDU (媒体接入控制层协议 数据单元)。在一个 MAC PDU中,可以包含多个 MAC SDU和 MAC CE( MAC 控制单元, MAC control element ) , 这些 MAC SDU可以来自不同的逻辑信 道, 可能的逻辑信道包括 MTCH、 MCCH、 MSCH等, MAC CE可以承载动 态调度信息。 这些来自不同逻辑信道的数据在 MAC PDU中串接在一起后一 起在物理信道上发送。 为了区别来自不同逻辑信道的 MAC SDU, MAC PDU 中携带了标识信息,具体的,有逻辑信道的标识、该逻辑信道的数据块在 MAC PDU中的位置信息等, 用于接收端区别不同逻辑信道的数据块。
由于 MBMS业务传输的区域不同,可能在某个小区中会存在多条 MCH, 分别承载属于不同 MBMS业务区域的业务; 另外, 由于业务的 QoS ( Quality of Service, 服务质量)属性不同, 一个 MBSFN区域也可能配置多条 MCH, 每条 MCH分配配置不同的 MCS( Modulation Coding Scheme,调制编码方案), 分别承载不同 QoS要求的 MBMS业务, 也包括特殊 QoS要求的 MCCH和 DSI。 在存在多条 MCH的场景下, 调度信息如何发送以及选择相应的 MCS 需要进行设计。
发明内容
本发明要解决的技术问题是提供一种传输动态调度信息的方法及系统, 指示用户设备 ( UE )业务调度信息, 适用于系统存在多条 MCH的场景。 为了解决上述问题, 本发明提供了一种传输动态调度信息的方法, 包括: 网络侧将一个单频网多播广播( MBSFN )区域中的多个多播信道( MCH ) 上承载的多媒体广播和组播业务(MBMS )的动态调度信息(DSI )承载在一 个 MCH上发送;
其中, 所述网络侧将多个 DSI承载在一个 MCH上发送的步骤包括: 所述网络侧将所述多个 DSI放置在一起后承载在一个 MCH上发送; 或
所述网络侧将所述多个 DSI合并为一条 DSI后承载在一个 MCH上 发送。
所述网络侧可以是分别在各个 MCH自身的调度周期时候发送该 MCH的
DSI。 发送所述放置在一起的多个 DSI或所述合并为一条的 DSI; 其中, 调度周期, 或为所述 MBSFN区域的所有 MCH的调度周期的最大公约数。
所述的方法还包括:
所述网络侧为所述 MBSFN区域的多条 MCH分配 MBSFN子帧资源;其 中 ,分配周期为所述 MBSFN区域的所有 MCH的调度周期中最长的调度周期 , 或为所述 MBSFN区域的所有 MCH的调度周期的最小公倍数。
所述网络侧将多个 DSI承载在一个 MCH上的步骤为: 所述网络侧将所 述放置在一起的多个 DSI或所述合并为一条的 DSI承载在所述一个 MCH的 一个或多个 MBSFN子帧上的介质访问控制控制单元( MAC CE )中以进行发 送。
所述的方法还包括:
所述网络侧将所述放置在一起的多个 DSI或所述合并为一条的 DSI与多 播控制信道(MCCH )承载在相同或不同的 MBSFN子帧上; 以及,
为所述放置在一起的多个 DSI 或所述合并为一条的 DSI选择相应的 MCS, 其中,
当所述放置在一起的多个 DSI或所述合并为一条的 DSI与所述 MCCH承 载在相同的 MBSFN子帧上时, 所述网络侧将所述 MCCH 的调制编码方案 ( MCS )作为所述放置在一起的多个 DSI或所述合并为一条的 DSI的 MCS; 或
当所述放置在一起的多个 DSI或所述合并为一条的 DSI与所述 MCCH承 载在不同的 MBSFN子帧上时, 所述网络侧釆用下列方式之一确定所述放置 在一起的多个 DSI或所述合并为一条的 DSI的 MCS:
在所述 MCCH 的内容中或系统广播消息中为所述放置在一起的多 个 DSI或所述合并为一条的 DSI配置一个 MCS; 或
釆用与多播业务信道( MTCH )复用在一起的 MCH的 MCS作为所 述放置在一起的多个 DSI或所述合并为一条的 DSI的 MCS; 或
将所述 MCCH的 MCS作为所述放置在一起的多个 DSI或所述合并 为一条的 DSI的 MCS。
所述的方法还包括:
当用户设备需要接收 MBMS业务时,用户设备在承载了所述放置在一起 的多个 DSI或所述合并为一条的 DSI的 MCH信道上, 读取该 MBSFN区域 中每条 MCH上承载的 MBMS业务的调度信息, 根据读取的所述调度信息对 不同 MCH上承载的 MBMS业务进行接收。
本发明还提供了一种支持传输动态调度信息的系统的网络侧设备, 所述 网络侧设备设置为将一个单频网多播广播(MBSFN )区域中的多个多播信道 ( MCH ) 上承载的多媒体广播和组播业务(MBMS ) 业务的动态调度信息 ( DSI )承载在一个 MCH上发送; 其中,
所述网络侧设备是将多个所述 DSI放置在一起后承载在一个 MCH上发 送或将多个所述 DSI合并为一条 DSI后承载在一个 MCH上发送的。
所述网络侧设备可以是分别在各个 MCH 自身的调度周期时候发送该 MCH的 DSI。
所述网络侧设备也可以是在所述 MBSFN区域的所有 MCH的统一调度周 期上发送放置在一起的多个 DSI或所述合并为一条的 DSI; 其中, 所述统一 调度周期为所述 MBSFN区域的所有 MCH的调度周期中最短的调度周期,或 为所述 MBSFN区域的所有 MCH的调度周期的最大公约数。
所述网络侧设备还设置为为所述 MBSFN区域的多条 MCH分配 MBSFN 子帧资源,其中,分配周期为所述 MBSFN区域的所有 MCH的调度周期中最 长的调度周期,或为所述 MBSFN区域的所有 MCH的调度周期的最小公倍数。
所述网络侧设备可以是将所述放置在一起的多个 DSI或所述合并为一条 的 DSI承载在一个 MCH的一个或多个 MBSFN子帧上的 MAC CE中发送。
所述网络侧设备还设置为:
将放置在一起的多个 DSI 或所述合并为一条的 DSI 与多播控制信道
MCCH承载在相同或不同的 MBSFN子帧上; 以及
当所述放置在一起的多个 DSI或所述合并为一条的 DSI与所述 MCCH承 载在相同的 MBSFN子帧上时, 将所述 MCCH的 MCS作为所述放置在一起 的多个 DSI或所述合并为一条的 DSI的 MCS; 或
当所述放置在一起的多个 DSI或所述合并为一条的 DSI与所述 MCCH承 载在不同的 MBSFN子帧上时, 釆用下列方式之一确定所述放置在一起的多 个 DSI或所述合并为一条的 DSI的 MCS:
在所述 MCCH 的内容中或系统广播消息中为所述放置在一起的多 个 DSI或所述合并为一条的 DSI配置一个 MCS; 或
釆用与多播业务信道( MTCH )复用在一起的 MCH的 MCS作为所 述放置在一起的多个 DSI或所述合并为一条的 DSI的 MCS; 或
将所述 MCCH的 MCS作为所述放置在一起的多个 DSI或所述合并 为一条的 DSI的 MCS。
本发明还提供一种传输动态调度信息的系统, 其包括如上述所述的网络 侧设备, 以及用户设备; 其中,
所述用户设备设置为: 当需要接收 MBMS业务时, 在承载了所述调度信 息的 MCH上读取所述 MBSFN区域中每个 MCH上承载的 MBMS业务的调 度信息, 根据读取的所述调度信息对不同 MCH上承载的 MBMS业务进行接 收。
本发明的技术方案针对多条 MCH的场景下提供了一种 MBMS业务的动 态调度信息的传输方案,使接收端可以准确的得到需要接收的 MBMS业务在 一个调度周期内的具体位置信息, 具体的, 当 UE需要同时接收多个 MBMS 业务时, 可以一次性获得这些 MBMS业务的动态调度信息, 从而避免 UE多 次读取分散的动态调度信息, 节省了 UE 电力, 提高了接收效率, 并具有较 高的无线接口信令发送效率。 附图概述
图 1是现有技术中一个 MCH的 MSAP occasion所分配多播资源的示意 图;
图 2 ( a )是 Scheduling Period 1 (调度周期 1 ) 的资源分配示意图; 图 2 ( b )是 Scheduling Period 2 (调度周期 2 ) 的资源分配示意图; 图 2 ( c )是 Scheduling Period 3 (调度周期 3 ) 的资源分配示意图; 图 3是现有技术中多个 MCH的动态调度信息的配置示意图;
图 4是本发明中多个 MCH的动态调度信息统一配置在一起的示意图; 以及
图 5是本发明中统一发送 DSI的示意图。 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。
实施例一, 一种传输动态调度信息的方法, 包括:
网络侧将一个 MBSFN区域中的多个 MCH上承载的 MBMS业务的动态 调度信息( Dynamic scheduling information, DSI, 在本发明中也简称为调度信 息)承载在一个 MCH上发送。
本实施例中, 将多个所述 DSI (每个 DSI对应一个 MCH的动态调度信 息 )承载在一个 MCH上发送可以是指, 将多个所述 DSI统一地放置在一起 后承载在一个 MCH上发送; 将统一地放置在一起的多个 DSI简称为 DSI-a, DSI-a实质上仍然是多条 DSI, 其中的每条 DSI分别对应各自的 MCH的动态 调度信息的内容。
本实施例中, 将多个所述 DSI承载在一个 MCH上发送也可以是指, 将 多个所述 DSI合并为一条 DSI后承载在一个 MCH上发送, 为了描述方便, 将这个合并而成的 DSI称为 DSI-b; DSI-b实质是一条 DSI, 其内容包括了原 先的多个 DSI的内容, 即: DSI-b包括该 MBSFN区域的所有 MCH上承载的 MBMS业务的动态调度信息。一个 MBSFN区域可以有一个或多个 MCH,但 在这个 MBSFN区域只有一个 DSI ( DSI-b ) , 这个 DSI-b包括该 MBSFN区 域所有 MCH上所有 MBMS业务的动态调度信息。
本实施例中,将所述 DSI-a和所述 DSI-b统称为 DSI-t, DSI-t是指承载在 一个 MCH上发送的一个或多个 DSI。
在一个 MBSFN区域有多个 MCH, 编号为 1 , 2, ... ... , N, N为一个
MBSFN区域的最多 MCH的个数。每个 MCH都有一个调度周期( Scheduling period ) , 也称为 MSAP occasion ( MSAP时机) 。 每个 MCH唯一地对应一 个动态调度信息 DSIn, MCHn^^DSIn ( n=l , 2, ... ... , Ν ) 。 本实施例中, 釆用 DSI-a方式发送 DSI时候, 所述网络侧分别在各个 MCH 自身的调度周 期时候发送该 MCH的 DSI。 由于每条 MCH的调度周期不同, 所以 DSI-a中 对应每个 MCH的 DSI的个数可能不同。 本实施例中, 釆用 DSI-b方式发送 DSI时候,所述网络侧也是分别在各个 MCH自身的调度周期时候发送该 MCH 的 DSI,由于每条 MCH的调度周期不同,因此 DSI-b中 DSI的内容可能不同, 也就是说 DSI-b中仅有被调度的 MCH的调度信息。
本实施例中,将一个 MBSFN区域中所有 MCH的调度周期中最短的调度 周期称为统一调度周期, 统一调度周期 =min{SPl , SP2, ....SPn} , 其中 SPn 为第 n个 MCH的调度周期,统一调度周期也可以是所有 MCH的调度周期的 最大公约数。 如: 在一个 MBSFN区域有 5条 MCH, 这些 MCH的调度周期 分别为 160ms, 320ms, 640ms, 320ms和 160ms, 则该 MBSFN区域的所有 MCH的统一调度周期为 160ms;所述网络侧在一个 MBSFN区域的所有 MCH 的统一调度周期上发送所述 DSI-t。
网络侧为一个 MBSFN区域的多条 MCH分配 MBSFN子帧资源时,以这 些 MCH调度周期的最大值为周期来进行所述 MBSFN子帧资源的分配,其分 配周期为 max{SPl , SP2, ....SPn} , 其中 SPn为第 n个 MCH的调度周期, 分配周期也可以是全部 MCH调度周期的最小公倍数, 如图 5所示。
本实施例中,网络侧将所述 DSI-t承载在一个或多个 MBSFN子帧上发送。 这个或这些子帧上有一个或多个承载了 DSI的 MAC CE, 如果是 DSI-a, 该 MAC PDU上有多个承载了 DSI的 MAC CE, 如果是 DSI-b, 则该 MAC PDU 上有一个承载了 DSI的 MAC CE。
本实施例中, DSI-a或 DSI-b釆用同一个 MCS, 也就是说承载了 DSI-a 或 DSI-b的一个或多个 MBSFN子帧釆用相同的 MCS。
本实施例中, 所述网络侧将所述 DSI-t与 MCCH 载在相同或不同的
MBSFN子帧上;
当承载在相同的 MBSFN子帧上时, 所述网络侧将所述 MCCH的 MCS 作为所述 DSI-t的 MCS;
当承载在不同的 MBSFN子帧上时, 所述网络侧釆用下列方式之一确定 所述 DSI-t的 MCS:
在所述 MCCH内容中或系统广播消息中为所述 DSI-t配置一个 MCS; 釆用与 MTCH复用在一起的 MCH的 MCS作为所述 DSI-t的 MCS; 将所述 MCCH的 MCS作为所述 DSI-t的 MCS。
本实施例中, 网络侧通过上述方法为 DSI-t选择了相应的 MCS。
本实施例中, 所述方法还包括:
当 UE需要接收 MBMS业务时, UE在承载了 DSI-t的 MCH信道上读取 该 MBSFN区域中每条 MCH上承载的 MBMS业务的调度信息, 根据读取的 所述调度信息对不同 MCH上承载的 MBMS业务进行接收。
UE和网络侧设备可以约定或默认在哪个 MCH信道上承载所述 DSI-t。 本实施例中, 当 DSI-t与 MCCH复用在一条 MCH上时, 都釆用同一个
MCS, 这个 MCS可以从读取系统广播消息上的 MCCH的 MCS来获得; 当 DSI-t没有与 MCCH复用在一条 MCH上, DSI-t的 MCS可以通过读 取 MTCH上的承载了 DSI-t的 MCH的 MCS来获得;
当 DSI-t没有与 MCCH复用在一条 MCH上, DSI-t的 MCS可以通过读 取 MCCH或系统广播消息上承载了 DSI-t的 MCS来获得。 在该方法中, 需 要所述网络侧在 MCCH内容中或系统广播消息中为 DSI-t配置一个 MCS。
当 DSI-t没有与 MCCH复用在一条 MCH上, DSI-t的 MCS还可以通过 读取系统广播消息上的 MCCH的 MCS来获得,此时 DSI-t与 MCCH的 MCS 相同, 而无论二者是否承载在一条 MCH上。
下面结合图 4介绍一个传输动态调度信息的应用示例, 该应用示例如图 4所示,假设一个 MBSFN区域有 4条用于承载 MBMS的 MCH,分别为 MCH1 , MCH2, ...MCH4。 其中的一条 MCH上承载了 DSI-t, 还可以承载 MCCH和 MTCHs„ 每条 MCH的调度周期依次为 160ms, 160ms, 320ms, 和 640ms, 分别对应 MCHl , MCH2 , ... MCH4,则这 4条 MCH的统一调度周期为 160ms , 即统一调度周期是所有 MCH调度周期的最小值或最大公约数。 同时这 4条 MCH的分配周期为 640ms, 即分配周期是所有 MCH调度周期的最大值或最 小公倍数。 此时 640ms的分配周期内包括 4个统一调度周期, 如图 4所示。
包括以下步骤:
( 1 ) 网络侧设备在各所述统一调度周期上, 将一个 MBSFN 区域中各 MCH承载的 MBMS业务的调度信息 DSI-t统一地承载在一条 MCH上发送。
在一个分配周期内, 在 4个统一调度周期( 160ms )上 DSI-t的内容都有 MCH1和 MCH2的调度信息, 在第一个统一调度周期( 160ms )的 DSI-t上有 所用 4条 MCH的调度信息内容; 在第二个统一调度周期 (160ms )上只有 MCH1 和 MCH2 的调度信息内容, 在第三个统一调度周期 (160ms )上有 MCHl , MCH2和 MCH3的调度信息内容, 在第四个统一调度周期 ( 160ms ) 上只有 MCH1和 MCH2的调度信息内容。 这四个统一调度周期 ( 160ms )组 成了一个分配周期, 如图 5所示。 从图 5可知, MCH1和 MCH2在 640ms的 分配周期内, 被调度了 4次, 而 MCH3被调度了 2次, 而 MCH4仅被调度了 1次。
如果承载了 MCCH, 则 MCCH承载在 DSI-t之前, 如果承载了 MTCHs, 则 MTCHs承载在 DSI-t之后。
DSI-t承载在一个或多个 MBSFN子帧上, 网络侧为该 DSI-t选择相应的 MCS,如果是承载在其中的一个子帧上,如: 第一个子帧上还承载有 MCCH, 则 DSI-t的 MCS与 MCCH的 MCS相同, 这个 MCS, 也就是 MCCH的 MCS 配置在系统广播消息上;如果承载 DSI-t的一个或多个 MBSFN子帧上都没有 MCCH, 则 DSI-t的 MCS釆用与 MTCH复用在一起的 MCH的 MCS, 这个 MCS配置在 MCCH内容中, 也就是 MCCH上配置了所有 MCH的 MCS , 而 DSI-t的 MCS釆用一条 MCH的内容, 或者 DSI-t仍然釆用 MCCH的 MCS, 或者 DSI-t釆用系统广播消息或 MCCH为其配置的 MCS。
( 2 ) 当 UE需要接收 MBMS业务时, UE在承载了所述 DSI-t的 MCH 信道上读取该 MBSFN区域中每条 MCH的 MBMS业务的调度信息, 根据读 取的所述调度信息对不同 MCH上的 MBMS业务进行接收。
如果承载了 DSI-t的一个或多个 MBSFN子帧的其中一个子帧上还承载有 MCCH, 一般是第一个子帧, 此时 UE可以通过读取系统广播消息事先地获 取 MCCH的 MCS ,进而 UE可以知道 DSI-t所釆用的相同 MCS。如果承载了 DSI-t的子帧上还承载有一个 MTCH或多个 MTCH(多个 MTCH即 MTCHs ), 则这个或这些 MTCH也釆用该 MCS。
如果承载了 DSI-t的一个或多个 MBSFN子帧上都没有承载 MCCH, 此 时 UE可以通过读取 MCCH的内容事先地获取到承载了 DSI-t的 MCH的 MCS, 或者 UE仍然读取系统广播消息上 MCCH的 MCS, 或者 UE读取系统 广播消息或 MCCH内容获得该 DSI-t的 MCS, 进而 UE可以知道 DSI-t所釆 用的 MCS。
为了简便起见,一个 MBSFN区域的多条 MCH可以配置为相同的调度周 期, 此时统一调度周期和分配周期也相同也等于调度周期。 这样, 在每个统 一调度周期上的 DSI-t包括了所有 MCH的动态调度信息。
实施例二, 一种传输动态调度信息的系统, 包括:
网络侧设备, 用于将一个 MBSFN区域中各 MCH承载的 MBMS业务的 调度信息承载在一个 MCH上发送。 UE,用于当需要接收 MBMS业务时,在承载了所述调度信息的 MCH上 读取所述 MBSFN区域中每个 MCH上承载的 MBMS业务的调度信息, 根据 读取的所述调度信息对不同 MCH上承载的 MBMS业务进行接收。
其它实现细节同实施例一中所述。
实施例三, 一种支持传输动态调度信息的系统的网络侧设备,
该网络侧设备用于将一个 MBSFN区域中各 MCH承载的 MBMS业务的 调度信息承载在一个 MCH上发送。
其它实现细节同实施例一中所述。
当然, 本发明还可有多种实施方式, 在不背离本发明精神及其实质的情 凡在本发明的精神和原则之内所作的任何修改、 等同替换、 改进, 均应包含 在本发明所附的权利要求的保护范围之内。
工业实用性
本发明的技术方案针对多条 MCH的场景下提供了一种 MBMS业务的动 态调度信息的传输方案,使接收端可以准确的得到需要接收的 MBMS业务在 一个调度周期内的具体位置信息, 具体的, 当 UE需要同时接收多个 MBMS 业务时, 可以一次性获得这些 MBMS业务的动态调度信息, 从而避免 UE多 次读取分散的动态调度信息, 节省了 UE 电力, 提高了接收效率, 并具有较 高的无线接口信令发送效率。

Claims

权 利 要 求 书
1、 一种传输动态调度信息的方法, 其包括:
网络侧将一个单频网多播广播( MBSFN )区域中的多个多播信道( MCH ) 上承载的多媒体广播和组播业务(MBMS )的动态调度信息(DSI )承载在一 个 MCH上发送;
其中, 所述网络侧将多个 DSI承载在一个 MCH上发送的步骤包括: 所述网络侧将所述多个 DSI放置在一起后承载在一个 MCH上发送; 或
所述网络侧将所述多个 DSI合并为一条 DSI后承载在一个 MCH上 发送。
2、 如权利要求 1所述的方法, 其中:
所述网络侧是分别在各个 MCH 自身的调度周期时候发送该 MCH 的
DSI。
3、 如权利要求 1所述的方法, 其中:
所述网络侧是在所述 MBSFN区域的所有 MCH的统一调度周期上发送所 述放置在一起的多个 DSI或所述合并为一条的 DSI; 其中, 调度周期, 或为所述 MBSFN区域的所有 MCH的调度周期的最大公约数。
4、 如权利要求 1所述的方法, 其还包括:
所述网络侧为所述 MBSFN区域的多条 MCH分配 MBSFN子帧资源;其 中,
分配周期为所述 MBSFN区域的所有 MCH的调度周期中最长的调度周 期, 或为所述 MBSFN区域的所有 MCH的调度周期的最小公倍数。
5、 如权利要求 1所述的方法, 其中, 所述网络侧将多个 DSI承载在一个 MCH上的步骤为:
所述网络侧将所述放置在一起的多个 DSI或所述合并为一条的 DSI承载 在所述一个 MCH 的一个或多个 MBSFN子帧上的介质访问控制控制单元 ( MAC CE ) 中以进行发送。
6、 如权利要求 1所述的方法, 其还包括:
所述网络侧将所述放置在一起的多个 DSI或所述合并为一条的 DSI与多 播控制信道(MCCH )承载在相同或不同的 MBSFN子帧上; 以及,
为所述放置在一起的多个 DSI 或所述合并为一条的 DSI选择相应的
MCS, 其中,
当所述放置在一起的多个 DSI或所述合并为一条的 DSI与所述 MCCH承 载在相同的 MBSFN子帧上时, 所述网络侧将所述 MCCH 的调制编码方案 ( MCS )作为所述放置在一起的多个 DSI或所述合并为一条的 DSI的 MCS; 或
当所述放置在一起的多个 DSI或所述合并为一条的 DSI与所述 MCCH承 载在不同的 MBSFN子帧上时, 所述网络侧釆用下列方式之一确定所述放置 在一起的多个 DSI或所述合并为一条的 DSI的 MCS:
在所述 MCCH 的内容中或系统广播消息中为所述放置在一起的多 个 DSI或所述合并为一条的 DSI配置一个 MCS; 或
釆用与多播业务信道( MTCH )复用在一起的 MCH的 MCS作为所 述放置在一起的多个 DSI或所述合并为一条的 DSI的 MCS; 或
将所述 MCCH的 MCS作为所述放置在一起的多个 DSI或所述合并 为一条的 DSI的 MCS。
7、 如权利要求 1到 6中任一项所述的方法, 其还包括:
当用户设备需要接收 MBMS业务时,所述用户设备在承载了所述放置在 一起的多个 DSI或所述合并为一条的 DSI的 MCH信道上,读取所述 MBSFN 区域中每条 MCH上承载的 MBMS业务的调度信息, 根据读取的所述调度信 息对不同 MCH上承载的 MBMS业务进行接收。
8、 一种支持传输动态调度信息的系统的网络侧设备, 所述网络侧设备设 置为将一个单频网多播广播(MBSFN )区域中的多个多播信道(MCH )上承 载的多媒体广播和组播业务(MBMS )业务的动态调度信息(DSI )承载在一 个 MCH上发送; 其中, 所述网络侧设备是将多个所述 DSI放置在一起后承载在一个 MCH上发 送或将多个所述 DSI合并为一条 DSI后承载在一个 MCH上发送的。
9、 如权利要求 8所述的网络侧设备, 其中:
所述网络侧设备是分别在各个 MCH自身的调度周期时候发送该 MCH的 DSI。
10、 如权利要求 8所述的网络侧设备, 其中:
所述网络侧设备是在所述 MBSFN区域的所有 MCH的统一调度周期上发 送放置在一起的多个 DSI或所述合并为一条的 DSI; 其中, 所述统一调度周 期为所述 MBSFN区域的所有 MCH的调度周期中最短的调度周期,或为所述 MBSFN区域的所有 MCH的调度周期的最大公约数。
11、 如权利要求 8所述的网络侧设备, 所述网络侧设备还设置为: 为所述 MBSFN区域的多条 MCH分配 MBSFN子帧资源, 其中, 分配周期为所述 MBSFN区域的所有 MCH的调度周期中最长的调度周 期, 或为所述 MBSFN区域的所有 MCH的调度周期的最小公倍数。
12、 如权利要求 8所述的网络侧设备, 其中:
所述网络侧设备是将放置在一起的多个 DSI或所述合并为一条的 DSI承 载在一个 MCH的一个或多个 MBSFN子帧上的 MAC CE中发送。
13、 如权利要求 8所述的网络侧设备, 所述网络侧设备还设置为: 将放置在一起的多个 DSI 或所述合并为一条的 DSI 与多播控制信道 MCCH承载在相同或不同的 MBSFN子帧上; 以及
当所述放置在一起的多个 DSI或所述合并为一条的 DSI与所述 MCCH承 载在相同的 MBSFN子帧上时, 将所述 MCCH的 MCS作为所述放置在一起 的多个 DSI或所述合并为一条的 DSI的 MCS; 或
当所述放置在一起的多个 DSI或所述合并为一条的 DSI与所述 MCCH承 载在不同的 MBSFN子帧上时, 釆用下列方式之一确定所述放置在一起的多 个 DSI或所述合并为一条的 DSI的 MCS:
在所述 MCCH 的内容中或系统广播消息中为所述放置在一起的多 个 DSI或所述合并为一条的 DSI配置一个 MCS; 或
釆用与多播业务信道( MTCH )复用在一起的 MCH的 MCS作为所 述放置在一起的多个 DSI或所述合并为一条的 DSI的 MCS; 或
将所述 MCCH的 MCS作为所述放置在一起的多个 DSI或所述合并 为一条的 DSI的 MCS。
14、 一种传输动态调度信息的系统, 其包括如权利要求 8-13中任一项所 述的网络侧设备, 以及用户设备; 其中,
所述用户设备设置为: 当需要接收 MBMS业务时, 在承载了所述调度信 息的 MCH上读取所述 MBSFN区域中每个 MCH上承载的 MBMS业务的调 度信息, 根据读取的所述调度信息对不同 MCH上承载的 MBMS业务进行接 收。
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