WO2011009354A1 - Method and system for receiving service data - Google Patents

Method and system for receiving service data Download PDF

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Publication number
WO2011009354A1
WO2011009354A1 PCT/CN2010/074098 CN2010074098W WO2011009354A1 WO 2011009354 A1 WO2011009354 A1 WO 2011009354A1 CN 2010074098 W CN2010074098 W CN 2010074098W WO 2011009354 A1 WO2011009354 A1 WO 2011009354A1
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WO
WIPO (PCT)
Prior art keywords
subframe
service data
information
ofdm symbols
pdcch
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PCT/CN2010/074098
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French (fr)
Chinese (zh)
Inventor
苟伟
马子江
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中兴通讯股份有限公司
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Publication of WO2011009354A1 publication Critical patent/WO2011009354A1/en

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    • 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—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • 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

Definitions

  • the present invention relates to the field of Long Term Evolution (LTE) system technology, and in particular, to a multimedia broadcast multicast service (MBMS) service data receiving method and system.
  • LTE Long Term Evolution
  • MBMS multimedia broadcast multicast service
  • the 3rd Generation Partnership Project (3GPP) proposed the MBMS service, which is a technology that transmits data from one data source to multiple targets, and implements the network.
  • the sharing of resources (including the core network and the access network) improves the utilization of network resources (especially air interface resources).
  • MBMS defined by 3GPP can not only realize plain text low-rate message broadcast and multicast, but also enable high-speed multimedia service broadcast and multicast, providing a variety of rich video, audio and multimedia services, which undoubtedly conforms to future mobile
  • 3G 3rd Generation, 3rd generation mobile communication technology
  • the MBMS service can be transmitted in a hybrid carrier mode, and the hybrid carrier mode means that the unicast service (Unicast) and the multicast service (MBMS service) are transmitted on the same carrier in a time division multiplexing manner, and time division multiplexing is performed.
  • the smallest unit is a sub-frame.
  • a subframe configured by using the MBSFN (Multimedia Broadcast Broadcast Service Single Frequency Network)-SubframeConfiguration parameter in the SIB (System Information Block) 2 is called an MBSFN subframe.
  • the main function of the MBSFN subframe is to transmit MBMS services, but not all MBSFN subframes are used. Contains MBMS business.
  • the feature of the MBSFN subframe in the LTE R9 is that the extended cyclic prefix is used, and the first or two OFDM (Orthogonal Frequency Division Multiplexing) symbols are used to carry the unicast.
  • the service control information that is, the PDCCH (Physical Downlink Control CHannel)
  • PDCCH Physical Downlink Control CHannel
  • the remaining OFDM symbol resources are used to transmit the MBMS service data. Since the unicast service data is not transmitted on the remaining OFDM symbols, but the MBMS service data is transmitted, after receiving the PDCCH of the MBSFN subframe, the unicast receiving end does not receive the data on the following OFDM symbols; and the MBMS service receiving end does not. The PDCCH on the previous OFDM symbol is received, and the MBMS service data on the following OFDM symbol is directly received.
  • the reception of the MBMS service data in the LTE R9 system has the following problems: Since the receiving end cannot determine the resource condition occupied by the service data to be received, the service data is blindly attempted to be parsed when receiving, and the received service data is invalid due to the decoding error. . Summary of the invention
  • the technical problem to be solved by the present invention is to provide a method and system for receiving service data, so that the receiving end can receive and parse the service data according to the determined resource condition of receiving the service data.
  • the present invention provides a method for receiving service data, including: receiving, by a receiving end, resource occupation information of control information in a subframe to be received;
  • the resource occupation information of the control information is the number of orthogonal frequency division multiplexing OFDM symbols occupied by the PDCCH in the subframe.
  • the resource occupation information of the service data is the number of OFDM symbols occupied by the service data in the subframe. Or resource information within an OFDM symbol.
  • step of determining, by the receiving end, the resource occupation information of the control information in the subframe to be received receiving and parsing information on the physical control format indication channel PCFICH in the first OFDM symbol of each of the subframes to determine The number of OFDM symbols occupied by the PDCCH; or
  • the number of OFDM symbols occupied by the PDCCH in all MBSFN subframes in the predetermined MBSFN area in the BCCH modification period in which the MBSFN subframe is located is determined by receiving information on the PCFICH in a MBSFN subframe in the predetermined MBSFN area.
  • the high layer signaling includes dynamic scheduling information of the MBMS service of the multimedia broadcast multicast service, multicast control channel MCCH information or broadcast control channel BCCH information.
  • the system lnfoModification parameter is modified by monitoring system information in the paging message to determine the number of OFDM symbols occupied by the PDCCH.
  • the step of determining the resource occupation information of the service data in the subframe according to the resource occupation information of the control information includes:
  • Determining whether there is an important system message in the subframe if there is no important system message in the subframe, subtracting the total number of OFDM symbols of the subframe from the number of OFDM symbols occupied by the PDCCH, that is, obtaining the Decoding the number of OFDM symbols occupied by the service data; if there are important system messages in the subframe, subtracting the total OFDM symbol number of the subframe from the OFDM occupied by the PDCCH After the number of symbols, the number of OFDM symbols occupied by the important system message or the resources in the occupied OFDM symbol is subtracted to obtain resource occupation information of the service data.
  • the subframe includes a non-multicast multicast single frequency network MBSFN subframe, or an MBSFN subframe used to carry the MBMS service.
  • the service data includes: MBMS service data and/or location service data.
  • the present invention also provides a service data receiving system, including a resource occupation information unit and a receiving unit, wherein:
  • the resource occupation information unit is configured to determine resource occupation information of the control information in the subframe to be received, and calculate resource occupation information of the service data in the subframe according to the resource occupation information of the control information, and then the service The resource occupation information of the data is sent to the receiving unit;
  • the receiving unit is configured to receive and parse the service data according to the resource occupation information of the service data.
  • the resource occupation information of the control information is the number of orthogonal frequency division multiplexing OFDM symbols occupied by the PDCCH in the subframe;
  • the resource occupation information of the service data is that the service data occupies the OFDM symbol number or the OFDM symbol of the subframe Resource information;
  • the resource occupation information unit is set to:
  • the resource occupation information unit is set to:
  • Determining whether there is an important system message in the subframe if there is no important system message in the subframe, subtracting the total number of OFDM symbols of the subframe from the number of OFDM symbols occupied by the PDCCH, that is, obtaining the Describe the number of OFDM symbols occupied by the service data; if there are important system messages in the subframe, subtract the number of OFDM symbols occupied by the PDCCH from the total number of OFDM symbols of the subframe, and then subtract the important The number of OFDM symbols occupied by the system message or the resources in the occupied OFDM symbol obtains resource occupation information of the service data.
  • the subframe includes a non-multicast multicast single frequency network MBSFN subframe, or an MBSFN subframe for carrying a multimedia broadcast multicast service MBMS service.
  • the service data includes: MBMS service data and/or location service data.
  • the present invention can effectively receive the MBMS service data in the current LTE R9 system, and does not require the receiving end to blindly attempt to parse the service data, and does not need to modify the existing sender protocol.
  • FIG. 1 is a schematic flowchart of a service data receiving method according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram showing the composition of a service data receiving system according to an embodiment of the present invention. Preferred embodiment of the invention
  • the core idea of the present invention is: In the LTE system, the receiving end first determines the resource occupancy of the control information in the subframe to be received, and then determines the resource occupancy of the service data in the subframe according to the resource occupancy of the control information, Receive and parse business data.
  • the present invention specifically uses the following technical solutions:
  • the information on the PCFICH (Physical Control Format Indicator Channel) channel in the subframe is used to indicate the number of OFDM symbols occupied by the PDCCH, and the receiving end can determine the OFDM for the PDCCH by receiving and parsing the information of the PCFICH channel. The number of symbols. However, the receiving end does not receive the control information itself in the PDCCH, and only receives the information of the PCFICH channel and parses it.
  • PCFICH Physical Control Format Indicator Channel
  • the high-level signaling may be used to indicate that the receiving end passes the Dynamic Scheduling Information, the MCCH (Multicast Control Channel) information, or the BCCH (Broadcast Control Channel) information of the MBMS service within a certain period (for example, 320 ms).
  • the receiving end can obtain the number of symbols of the OFDM occupied by the MBSFN subframe PDCCH carrying the MBMS service in a certain period.
  • the method for the receiving end to determine the number of OFDM symbols occupied by the PDCCH on the MBSFN subframe that carries the MBMS service includes:
  • the receiving end determines the MBSFN area by receiving a PCFICH of an MBSFN subframe (that is, a subframe of a Physical Multicast Channel (PMCH) constituting the MBSFN area in the LTE) in a certain MBSFN area.
  • a PCFICH of an MBSFN subframe that is, a subframe of a Physical Multicast Channel (PMCH) constituting the MBSFN area in the LTE
  • the receiving end may determine whether the number of OFDM symbols occupied by the PDCCH of the MBSFN subframe in the MBSFN area in the next BCCH modification period occurs by monitoring the system information modification (systemlnfoModification) parameter in the paging message. Variety.
  • the number of OFDM symbols occupied by the PDCCH of the MBSFN subframe in the MBSFN area in the next BCCH modification period does not change. If the systemInfoModification parameter exists, the MBSFN in the next BCCH modification period is indicated. The number of OFDM symbols occupied by the PDCCH of the MBSFN subframe in the area may change. In this case, the receiving end needs to re-receive the first MBSFN subframe in the MBSFN area in the next BCCH modification period to determine all MBSFNs in the MBSFN area. The number of OFDM symbols occupied by the PDCCH of the subframe.
  • the OFDM symbol for transmitting the PDCCH is removed from the total OFDM symbol of the subframe to be received, if some of the remaining OFDM symbols carry important system messages, such as BCCH information and pilots, the message is removed.
  • the remaining resources are the resources used to transmit the service data. If the remaining OFDM symbols in the subframe do not have the BCCH system message and pilot, the remaining OFDM symbols in the subframe are all used for transmitting service data.
  • the service data includes MBMS service data and positioning service data
  • the positioning service data is data for assisting UE positioning, and is ositioning reference signals in LTE.
  • the OFDM symbol of one subframe in LTE is limited, and the total number of OFDM symbols of the same type of subframe is fixed.
  • the extended cyclic prefix there are 12 OFDM symbols in the subframe, and when the standard cyclic prefix is used, there are 14 OFDM symbols in the subframe.
  • the receiving end can obtain the cyclic prefix condition used by the subframe by using related information, so the receiving end can know the total number of OFDM symbols of each subframe.
  • the PCFICH channel is carried on the first OFDM symbol of each subframe, and the information of the PCFICH channel is used to indicate the number of OFDM symbols occupied by the PDCCH, and the PCFICH channel of each cell is located on the first OFDM symbol.
  • the fixed location this fixed location is related to the cell ID (identification), and varies depending on the cell ID.
  • the terminal can know the location information of the PCFICH channel in each subframe.
  • This embodiment describes a procedure of how the receiving end receives MBMS service data in the data domain of the subframe when the PCFICH is used to carry the number of OFDM symbols occupied by the PDCCH.
  • the MBMS service is carried in the MBSFN subframe.
  • the current protocol specifies that the first one or two OFDM symbols of each MBSFN subframe are used for the PDCCH, so that the unicast service is normal. transmission.
  • up to 2 OFDM symbols of the MBSFN subframe carrying the MBMS service transmit the PDCCH, but the subsequent remaining OFDM symbols do not send the unicast service data, but transmit the MBMS service data.
  • the receiving end receives the MBMS service data as follows:
  • Step 101 The receiving end determines the number of OFDM symbols used for the PDCCH in the MBSFN subframe to be received. Receiving information of the PCFICH channel in the first OFDM symbol of each MBSFN subframe received, and parsing the information therein, thereby obtaining the number of OFDM symbols occupied by the PDCCH in the subframe.
  • the receiving end continues to receive the following OFDM symbol data while parsing the PCFICH, because if the receiving end does not receive the subsequent OFDM symbol in the parsing process, the delay of the parsing of the PCFICH may cause subsequent OFDM symbol data. Lost.
  • the present invention can also notify the receiving end through high layer signaling to determine the OFDM symbol occupied by the PDCCH in the MBSFN subframe to be received. Therefore, in other embodiments of the present invention, the receiving end may further determine the number of OFDM symbols occupied by the PDCCH according to the received high layer signaling, so that the number of OFDM symbols used for the MBMS service in the subframe may be indirectly obtained without receiving The number of OFDM symbols occupied by the PDCCH in the subframe is determined in each MBSFN subframe.
  • the PDCCH occupies 1 OFDM symbol in the subframe.
  • the second OFDM symbol can be used to transmit the MBMS service.
  • Step 102 The receiving end determines the number of symbols occupied by the service data in the MBMS subframe to be received.
  • the receiving end learns that the MBSFN subframe uses the extended cyclic prefix according to the protocol, and thus has a total of 12 OFDM symbols. Since the MBMS service data is not used to carry the BCCH, in this embodiment, it is not necessary to consider whether there is an important system message. Thus, except for the first OFDM symbol, 11 OFDM symbol resources behind the subframe are used for the bearer receiving end.
  • the MBMS service data to be received does not include the resources occupied by the pilot if there are bearer pilots in the next 11 symbols.
  • Step 103 The receiving end continues to receive data on all OFDM symbols in the subframe, and finally parses the received MBMS service data according to the related control information of the MBMS service, including channel estimation, decoding, etc., to finally obtain an effective MBMS service. data.
  • This embodiment describes how the receiving end receives the MBMS service data in the data domain of the subframe when the PCFICH is used in conjunction with the BCCH modification period to determine the OFDM number of the PDCCHs of all the MBSFN subframes carrying the MBMS service in a certain MBSFN area. the process of.
  • the MBMS service is carried in the MBSFN subframe, and the current protocol specifies that the first one or two OFDM symbols of each MBSFN subframe is
  • the PDCCH is used to facilitate normal transmission of unicast traffic. In this way, up to 2 OFDM symbols of the MBSFN subframe carrying the MBMS service are sent to the PDCCH, but the unicast service data is not transmitted on the remaining OFDM symbols, but the MBMS service data is transmitted.
  • MCH Scheduling Information is used to indicate which MBSFN subframes are used for PMCH transmission.
  • the receiving end receives the MBMS service data. as follows:
  • Step 201 The receiving end determines the number of OFDM symbols used for the PDCCH in the MBSFN subframe to be received.
  • the receiving end may determine the number of OFDM symbols occupied by the PDCCH by using the following method: in each BCCH modification period, parsing the information in the PCFICH information in a certain MBSFN subframe in the MBSFN area, thereby obtaining the BCCH modification period.
  • the number of OFDM symbols occupied by the PDCCHs of all MBSFN subframes used for PMCH transmission in the MBSFN area is the same.
  • the PCFICH of the first MBSFN subframe in the MBSFN subframe in which the MBMS service in the MBSFN area is located in the MBSFN area is received in the BCCH modification period, so as to determine the MBMS service that is interested in the receiving end in the BCCH modification period.
  • the receiving end can determine whether the number of MBSFN changes in the next BCCH modification period by monitoring the systemlnfoModification parameter in the paging message. If the systemlnfoModification parameter does not exist (if the parameter exists, it indicates that the BCCH is updated in the next modification period, if it does not exist, the update does not occur), then the MBSFN where the MBMS service is located in the MBSFN area in the next BCCH modification period The number of OFDM symbols occupied by the PDCCH of the subframe does not change. If the systemInfo parameter is present, the number of OFDM symbols occupied by the PDCCH of the MBSFN subframe in the MBSFN area in the next BCCH modification period may change.
  • the receiver needs to be heavy in the next BCCH modification period.
  • the first MBSFN subframe in which the MBMS service is located in the MBSFN area is newly received to determine the number of OFDM symbols occupied by the PDCCH of the MBSFN subframe in which the MBMS service is located in the MBSFN area.
  • the receiving end continues to receive the OFDM symbol data subsequent to the subframe while parsing the PCFICH, because if the receiving end does not receive the subsequent OFDM symbol in the parsing process, the delay of the parsing of the PCFICH may result in the following OFDM. Symbol data is lost.
  • the receiving end can determine the number of OFDM symbols occupied by the PDCCH of all MBSFN subframes occupied by the MBMS service that is of interest to one MBC service by receiving the PCFICH once.
  • Step 202 The receiving end determines the number of symbols occupied by the service data in the MBMS subframe to be received.
  • the receiving end can learn the cyclic prefix used by all the MBSFN subframes according to the protocol, so that the OFDM symbol is shared by each MBSFN subframe. Number.
  • the receiving end uses its own feelings
  • the number of OFDM symbols, the remaining OFDM symbols are the MBMS services that are of interest to the receiving end.
  • the receiving end can know the number of OFDM symbols occupied by the MBMS service in the MBSFN subframe in which the MBMS service of the receiver is interested in a BCCH modification period.
  • Step 203 The receiving end receives, according to the learned OFDM symbol used by the MBMS service in the MBSFN subframe to be received, the data in the OFDM symbol in which the MBMS service of the MBMS service is located, and performs analysis, including channel estimation, decoding, and the like. Obtain valid MBMS business data.
  • the MBMS service that is of interest to the receiving end is only one form of the MBMS service that satisfies the predetermined condition, and the predetermined condition can be set as needed.
  • This embodiment describes how the receiving end receives the positioning service data (that is, the data for positioning and the positioning reference signal in LTE) in the data domain of the subframe when the PCFICH is used to carry the number of OFDM symbols occupied by the PDCCH. .
  • the positioning service data that is, the data for positioning and the positioning reference signal in LTE
  • the positioning service uses the data domain of the entire subframe to carry on
  • the control information related to the positioning service is not sent in the control domain of the subframe. Therefore, the control field of the subframe uses several OFDM symbols (sometimes using one OFDM symbol, sometimes using 2 or other numbers) as the control domain (PDCCH) of the subframe, and the receiving end of the receiving positioning service must know Because this directly affects the number of OFDM symbols occupied by the data field after the subframe.
  • the PCFICH is used to indicate that the PDCCH of the subframe occupies several OFDM symbols, and also indirectly informs which OFDM symbol the subframe data field starts from.
  • Step 301 The receiving end determines to wait The number of OFDM symbols used for the PDCCH in the received subframe; the receiving end receives the information of the PCFICH channel in the first OFDM symbol of the subframe, and parses the information therein to obtain the number of OFDM symbols occupied by the PDCCH in the subframe.
  • the receiving end continues to receive data of the following OFDM symbols while parsing the PCFICH.
  • the PDCCH occupies 1 OFDM symbol in the subframe.
  • Step 302 The receiving end determines the number of symbols occupied by the positioning service data in the subframe to be received.
  • the receiving end subtracts the number of OFDM symbols occupied by the PDCCH by the total number of OFDM symbols of the subframe, and the remaining OFDM is the OFDM symbol occupied by the positioning service data.
  • the OFDM symbols carrying the positioning service if there are important system messages, such as BCCH, pilot, then some of the resources occupied by this part are also removed; if there are no important system messages in the OFDM symbols carrying the positioning service, then Remove some of this resource.
  • the total number of OFDM symbols of the subframe which can be learned by the receiving end according to the existing protocol.
  • Step 303 The receiving end continues to receive data on all OFDM symbols in the subframe, and finally parses the received positioning service data according to related control information of the positioning service data, including channel estimation, decoding, etc., to finally obtain effective positioning.
  • Business data including channel estimation, decoding, etc.
  • the service data receiving system 2 includes a resource occupation information unit 21 and a receiving unit 22, where:
  • the resource occupation information unit is configured to determine resource occupation information of the control information in the subframe to be received, and determine resource occupation information of the service data in the subframe according to the resource occupation information of the control information, and The resource occupation information of the service data is sent to the receiving unit;
  • the receiving unit is configured to receive and parse the service data according to the resource occupation information of the service data.
  • control information refers to a PDCCH
  • resource occupation information refers to the number of orthogonal frequency division multiplexing OFDM symbols occupied by the PDCCH in the subframe
  • resource occupation information unit is set to:
  • the receiving system can be applied to a receiving end of an MBMS service or the like.
  • the present invention may have other various embodiments.
  • the subframe may include other non-MBSFN subframes in addition to the MBSFN subframe, and the PCFICH of the multicast service subframe exists in the subframe.
  • the total number of OFDM symbols of the multicast service subframe is also relatively fixed, being 12 or 14.
  • the present invention is applied to the MBMS service and the positioning service by way of example, but is not limited to these two types of services. Therefore, the flow of the present invention is equally applicable.
  • Those skilled in the art can make various phases in accordance with the present invention without departing from the spirit and scope of the present invention. All changes and modifications are intended to be included within the scope of the appended claims.
  • the service receiving method and system provided by the present invention enable the receiving end to receive and parse the service data according to the resource condition occupied by the service data to be received, so that the MBMS service data in the current LTE R9 system can be effectively received, thereby eliminating the need for The receiving end blindly attempts to parse the service data and does not need to modify the existing sender protocol.

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Abstract

A method and system for receiving service data are disclosed in the present invention, wherein, the method comprises the following steps that: a reception end determines the resource occupied information of the control information in a sub-frame to be received; determines the resource occupied information of the service data in the sub-frame according to the resource occupied information of the control information; and receives and parses the service data according to the resource occupied information of the service data. By applying the method and system for receiving service provided in the present invention, the efficient reception of the Multimedia Broadcast Multicast Service (MBMS) service data in the current Long Term Evolution(LTE) R9 system can be realized, so that there is no necessary for blindly attempting to parse the service data by a reception end, and no necessary for modifying the existing protocol of a sending end.

Description

一种业务数据的接收方法及***  Method and system for receiving business data
技术领域 Technical field
本发明涉及长期演进（Long Term Evolution, LTE ) ***技术领域， 特别 涉及一种多媒体广播组播服务（ Multimedia Broadcast Multicast Service , 简称 MBMS )业务数据的接收方法及***。  The present invention relates to the field of Long Term Evolution (LTE) system technology, and in particular, to a multimedia broadcast multicast service (MBMS) service data receiving method and system.
背景技术 Background technique
随着 Internet (因特网 )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， 在满足移动用户不断升级 的业务需求的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。  With the rapid development of the Internet (Internet) and the popularity of large-screen multi-function mobile phones, a large number of mobile data multimedia services and various high-bandwidth multimedia services have emerged, such as video conferencing, television broadcasting, video on demand, advertising, online education, and interaction. Games, etc., while meeting the ever-increasing business needs of mobile users, also bring new business growth points to mobile operators. These mobile data multimedia services require multiple users to receive the same data at the same time. Compared with general data services, they have the characteristics of large data volume, long duration, and delay sensitivity.
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 MBMS业务， 该业务是一种从一个 数据源向多个目标传送数据的技术， 实现了网络（包括核心网和接入网 ) 资 源的共享， 提高了网络资源（尤其是空中接口资源）的利用率。 3GPP定义的 MBMS不仅能够实现纯文本低速率的消息类广播和组播， 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 ( 3rd Generation , 第三代移动 通信技术） 的发展提供了更好的业务前景。  In order to effectively utilize mobile network resources, the 3rd Generation Partnership Project (3GPP) proposed the MBMS service, which is a technology that transmits data from one data source to multiple targets, and implements the network. The sharing of resources (including the core network and the access network) improves the utilization of network resources (especially air interface resources). MBMS defined by 3GPP can not only realize plain text low-rate message broadcast and multicast, but also enable 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 (3rd Generation, 3rd generation mobile communication technology).
目前，在 LTE中， MBMS业务可以釆用混合载波方式发送， 混合载波方 式是指单播业务（Unicast )和多播业务（MBMS业务） 以时分复用的方式在 同一载波上发送， 时分复用的最小单位为子帧。在 LTE中，通过 SIB ( System Information Block, ***信息块） 2 中使用 MBSFN ( Multimedia Broadcast multicast service Single Frequency Network , 多播组播单频网络 ) -SubframeConfiguration参数配置的子帧被称为 MBSFN子帧， MBSFN子帧的 主要作用是用来传输 MBMS业务的， 但是不是所有的 MBSFN子帧都用来承 载 MBMS业务。 截至目前 LTE R9中的 MBSFN子帧的特点是， 使用扩展循 环前缀（ Extended cyclic prefix ) , 其中前面 1个或者 2个 OFDM ( Orthogonal Frequency Division Multiplexing, 正交频分复用 )符号用于承载单播业务的控 制信息， 即作为 PDCCH ( Physical Downlink Control CHannel, 物理下行控制 信道）， 用于为单播业务的接收端进行服务， 与 MBMS业务没有关系， 因此 接收 MBMS 业务的接收端不需要接收。 以后有可能把 MBSFN子帧内的 PDCCH占用的 OFDM符号数增加。 对于用于发送 MBMS业务的 MBSFN子 帧而言， 除去 PDCCH占用的 OFDM符号资源外， 剩余的 OFDM符号资源用 于传输 MBMS业务数据。 由于剩余 OFDM符号上不发送单播业务数据， 而 是发送 MBMS业务数据， 所以单播接收端接收了该 MBSFN子帧的 PDCCH 后， 不再接收后面 OFDM符号上的数据； 而 MBMS业务接收端不接收前面 OFDM符号上的 PDCCH, 直接接收后面 OFDM符号上 MBMS业务数据。 At present, in LTE, the MBMS service can be transmitted in a hybrid carrier mode, and the hybrid carrier mode means that the unicast service (Unicast) and the multicast service (MBMS service) are transmitted on the same carrier in a time division multiplexing manner, and time division multiplexing is performed. The smallest unit is a sub-frame. In LTE, a subframe configured by using the MBSFN (Multimedia Broadcast Broadcast Service Single Frequency Network)-SubframeConfiguration parameter in the SIB (System Information Block) 2 is called an MBSFN subframe. The main function of the MBSFN subframe is to transmit MBMS services, but not all MBSFN subframes are used. Contains MBMS business. The feature of the MBSFN subframe in the LTE R9 is that the extended cyclic prefix is used, and the first or two OFDM (Orthogonal Frequency Division Multiplexing) symbols are used to carry the unicast. The service control information, that is, the PDCCH (Physical Downlink Control CHannel), is used to serve the receiving end of the unicast service, and has no relationship with the MBMS service. Therefore, the receiving end that receives the MBMS service does not need to receive. It is possible to increase the number of OFDM symbols occupied by the PDCCH in the MBSFN subframe in the future. For the MBSFN subframe used for transmitting the MBMS service, except for the OFDM symbol resources occupied by the PDCCH, the remaining OFDM symbol resources are used to transmit the MBMS service data. Since the unicast service data is not transmitted on the remaining OFDM symbols, but the MBMS service data is transmitted, after receiving the PDCCH of the MBSFN subframe, the unicast receiving end does not receive the data on the following OFDM symbols; and the MBMS service receiving end does not. The PDCCH on the previous OFDM symbol is received, and the MBMS service data on the following OFDM symbol is directly received.
目前 LTE R9***中的 MBMS业务数据的接收存在如下问题： 由于接收 端不能确定待接收业务数据占用的资源情况， 在接收时会盲目尝试解析业务 数据， 容易因译码错误导致接收的业务数据无效。 发明内容  At present, the reception of the MBMS service data in the LTE R9 system has the following problems: Since the receiving end cannot determine the resource condition occupied by the service data to be received, the service data is blindly attempted to be parsed when receiving, and the received service data is invalid due to the decoding error. . Summary of the invention
本发明要解决的技术问题是提供一种业务数据的接收方法及***， 使接 收端能够根据确定的将接收业务数据占用的资源情况对业务数据进行接收和 解析。  The technical problem to be solved by the present invention is to provide a method and system for receiving service data, so that the receiving end can receive and parse the service data according to the determined resource condition of receiving the service data.
为了解决上述问题， 本发明提供了一种业务数据的接收方法， 包括： 接收端确定待接收子帧内控制信息的资源占用信息；  In order to solve the above problem, the present invention provides a method for receiving service data, including: receiving, by a receiving end, resource occupation information of control information in a subframe to be received;
根据所述控制信息的资源占用信息确定所述子帧内业务数据的资源占用 信息； 以及  Determining, according to the resource occupation information of the control information, resource occupation information of the service data in the subframe; and
根据所述业务数据的资源占用信息接收并解析所述业务数据。  Receiving and parsing the service data according to the resource occupation information of the service data.
所述控制信息的资源占用信息是 PDCCH 占用所述子帧的正交频分复用 OFDM符号数。  The resource occupation information of the control information is the number of orthogonal frequency division multiplexing OFDM symbols occupied by the PDCCH in the subframe.
所述业务数据的资源占用信息是业务数据占用所述子帧的 OFDM符号数 或 OFDM符号内的资源信息。 The resource occupation information of the service data is the number of OFDM symbols occupied by the service data in the subframe. Or resource information within an OFDM symbol.
在所述接收端确定待接收子帧内控制信息的资源占用信息的步骤中， 接 收并解析每个所述子帧的第一个 OFDM符号中的物理控制格式指示信道 PCFICH上的信息， 以确定所述 PDCCH占用的 OFDM符号数； 或  In the step of determining, by the receiving end, the resource occupation information of the control information in the subframe to be received, receiving and parsing information on the physical control format indication channel PCFICH in the first OFDM symbol of each of the subframes to determine The number of OFDM symbols occupied by the PDCCH; or
通过接收到的高层信令中包含的指示所述 PDCCH占用的 OFDM符号数 的信息， 以确定所述 PDCCH占用的 OFDM符号数； 或  Determining the number of OFDM symbols occupied by the PDCCH by using information indicating the number of OFDM symbols occupied by the PDCCH included in the received high layer signaling; or
通过接收预定 MBSFN区域内一 MBSFN子帧中的 PCFICH上的信息，确 定所述 MBSFN子帧所在的 BCCH修改周期内所述预定 MBSFN区域内所有 MBSFN子帧中的 PDCCH占用的 OFDM符号数。  The number of OFDM symbols occupied by the PDCCH in all MBSFN subframes in the predetermined MBSFN area in the BCCH modification period in which the MBSFN subframe is located is determined by receiving information on the PCFICH in a MBSFN subframe in the predetermined MBSFN area.
在所述通过接收预定 MBSFN区域内一 MBSFN子帧中的 PCFICH上的信 息， 确定所述 MBSFN子帧所在的 BCCH修改周期内所述预定 MBSFN区域 内所有 MBSFN子帧中的 PDCCH占用的 OFDM符号数的步骤中，  Determining, by the information on the PCFICH in an MBSFN subframe in the predetermined MBSFN area, the number of OFDM symbols occupied by the PDCCH in all MBSFN subframes in the predetermined MBSFN area in the BCCH modification period in which the MBSFN subframe is located In the steps,
接收 BCCH修改周期内所述预定 MBSFN区域内满足预定条件的 MBMS 业务所在的 MBSFN子帧中第一个 MBSFN子帧的 PCFICH上的信息，确定所 述 BCCH修改周期内， 所述 MBMS 业务所占用的所有 MBSFN子帧中的 PDCCH占用的 OFDM符号数。  Receiving information on the PCFICH of the first MBSFN subframe in the MBSFN subframe in which the MBMS service in the predetermined MBSFN area meets the predetermined condition in the BCCH modification period, and determining the occupation of the MBMS service in the BCCH modification period. The number of OFDM symbols occupied by the PDCCH in all MBSFN subframes.
所述高层信令包括多媒体广播组播服务 MBMS业务的动态调度信息、多 播控制信道 MCCH信息或广播控制信道 BCCH信息。  The high layer signaling includes dynamic scheduling information of the MBMS service of the multimedia broadcast multicast service, multicast control channel MCCH information or broadcast control channel BCCH information.
在确定所述 MBSFN子帧所在的 BCCH修改周期内所述预定 MBSFN区 域内所有 MBSFN子帧中的 PDCCH占用的 OFDM符号数的步骤中，  In the step of determining the number of OFDM symbols occupied by the PDCCH in all MBSFN subframes in the predetermined MBSFN area within the BCCH modification period in which the MBSFN subframe is located,
通过监听寻呼消息中***信息修改 systemlnfoModification参数来确定 PDCCH占用的 OFDM符号数。  The system lnfoModification parameter is modified by monitoring system information in the paging message to determine the number of OFDM symbols occupied by the PDCCH.
所述根据所述控制信息的资源占用信息确定所述子帧内业务数据的资源 占用信息的步骤包括：  The step of determining the resource occupation information of the service data in the subframe according to the resource occupation information of the control information includes:
判断所述子帧内是否有重要的***消息， 如果所述子帧内没有重要的系 统消息，则将所述子帧的总 OFDM符号数减去所述 PDCCH占用的 OFDM符 号数， 即得到所述业务数据占用的 OFDM符号数； 如果所述子帧内有重要的 ***消息， 则将所述子帧的总 OFDM符号数减去所述 PDCCH占用的 OFDM 符号数后， 再减去所述重要的***消息占用的 OFDM符号数或者占用的 OFDM符号内的资源， 得到所述业务数据的资源占用信息。 Determining whether there is an important system message in the subframe, if there is no important system message in the subframe, subtracting the total number of OFDM symbols of the subframe from the number of OFDM symbols occupied by the PDCCH, that is, obtaining the Decoding the number of OFDM symbols occupied by the service data; if there are important system messages in the subframe, subtracting the total OFDM symbol number of the subframe from the OFDM occupied by the PDCCH After the number of symbols, the number of OFDM symbols occupied by the important system message or the resources in the occupied OFDM symbol is subtracted to obtain resource occupation information of the service data.
所述子帧包括非多播组播单频网络 MBSFN子帧， 或用于承载 MBMS业 务的 MBSFN子帧。  The subframe includes a non-multicast multicast single frequency network MBSFN subframe, or an MBSFN subframe used to carry the MBMS service.
所述业务数据包括： MBMS业务数据和 /或定位业务数据。  The service data includes: MBMS service data and/or location service data.
本发明还提供了一种业务数据的接收***， 包括资源占用信息单元和接 收单元， 其中：  The present invention also provides a service data receiving system, including a resource occupation information unit and a receiving unit, wherein:
所述资源占用信息单元设置为 , 确定待接收子帧内控制信息的资源占用 信息 , 并根据所述控制信息的资源占用信息计算所述子帧内业务数据的资源 占用信息后， 将所述业务数据的资源占用信息发送给所述接收单元；  The resource occupation information unit is configured to determine resource occupation information of the control information in the subframe to be received, and calculate resource occupation information of the service data in the subframe according to the resource occupation information of the control information, and then the service The resource occupation information of the data is sent to the receiving unit;
所述接收单元设置为， 根据所述业务数据的资源占用信息接收并解析所 述业务数据。  The receiving unit is configured to receive and parse the service data according to the resource occupation information of the service data.
所述控制信息的资源占用信息是 PDCCH 占用所述子帧的正交频分复用 OFDM符号数； 所述业务数据的资源占用信息是业务数据占用所述子帧的 OFDM符号数或 OFDM符号内的资源信息；  The resource occupation information of the control information is the number of orthogonal frequency division multiplexing OFDM symbols occupied by the PDCCH in the subframe; the resource occupation information of the service data is that the service data occupies the OFDM symbol number or the OFDM symbol of the subframe Resource information;
所述资源占用信息单元是设置为：  The resource occupation information unit is set to:
接收并解析每个所述子帧的第一个 OFDM符号中的物理控制格式指示信 道 PCFICH上的信息；或者，通过接收到的高层信令中包含的指示所述 PDCCH 占用的 OFDM符号数的信息， 以确定所述 PDCCH占用的 OFDM符号数。  Receiving and parsing information on the physical control format indication channel PCFICH in the first OFDM symbol of each of the subframes; or, information indicating the number of OFDM symbols occupied by the PDCCH included in the received higher layer signaling And determining the number of OFDM symbols occupied by the PDCCH.
所述资源占用信息单元是设置为：  The resource occupation information unit is set to:
判断所述子帧内是否有重要的***消息， 如果所述子帧内没有重要的系 统消息，则将所述子帧的总 OFDM符号数减去所述 PDCCH占用的 OFDM符 号数， 即得到所述业务数据占用的 OFDM符号数； 如果所述子帧内有重要的 ***消息， 则将所述子帧的总 OFDM符号数减去所述 PDCCH占用的 OFDM 符号数后， 再减去所述重要的***消息占用的 OFDM符号数或者占用的 OFDM符号内的资源， 得到所述业务数据的资源占用信息。  Determining whether there is an important system message in the subframe, if there is no important system message in the subframe, subtracting the total number of OFDM symbols of the subframe from the number of OFDM symbols occupied by the PDCCH, that is, obtaining the Describe the number of OFDM symbols occupied by the service data; if there are important system messages in the subframe, subtract the number of OFDM symbols occupied by the PDCCH from the total number of OFDM symbols of the subframe, and then subtract the important The number of OFDM symbols occupied by the system message or the resources in the occupied OFDM symbol obtains resource occupation information of the service data.
所述子帧包括非多播组播单频网络 MBSFN子帧， 或用于承载多媒体广 播组播服务 MBMS业务的 MBSFN子帧。 所述业务数据包括： MBMS业务数据和 /或定位业务数据。 The subframe includes a non-multicast multicast single frequency network MBSFN subframe, or an MBSFN subframe for carrying a multimedia broadcast multicast service MBMS service. The service data includes: MBMS service data and/or location service data.
釆用本发明可以实现目前 LTE R9 ***中的 MBMS业务数据的有效接 收， 不需要接收端盲目尝试解析业务数据， 并且不需要对现有的发送端协议 进行修改。 附图概述  The present invention can effectively receive the MBMS service data in the current LTE R9 system, and does not require the receiving end to blindly attempt to parse the service data, and does not need to modify the existing sender protocol. BRIEF abstract
图 1是本发明实施例的业务数据接收方法的流程示意图；  1 is a schematic flowchart of a service data receiving method according to an embodiment of the present invention;
图 2是本发明实施例的业务数据接收***的组成示意图。 本发明的较佳实施方式  2 is a schematic diagram showing the composition of a service data receiving system according to an embodiment of the present invention. Preferred embodiment of the invention
本发明的核心思想是： 在 LTE***中， 接收端首先确定待接收子帧内用 于控制信息的资源占用情况， 再根据控制信息的资源占用情况确定子帧内业 务数据的资源占用情况后， 对业务数据进行接收并解析。  The core idea of the present invention is: In the LTE system, the receiving end first determines the resource occupancy of the control information in the subframe to be received, and then determines the resource occupancy of the service data in the subframe according to the resource occupancy of the control information, Receive and parse business data.
如图 1所示， 本发明具体釆用如下技术方案：  As shown in FIG. 1, the present invention specifically uses the following technical solutions:
a )接收端确定待接收子帧内用于控制信息的资源占用情况， 具体为， 确 定待接收子帧内用于控制信息 (即 PDCCH ) 的 OFDM符号个数；  a) determining, by the receiving end, the resource usage of the control information in the subframe to be received, specifically, determining the number of OFDM symbols used for control information (ie, PDCCH) in the subframe to be received;
子帧中 PCFICH ( Physical Control Format Indicator CHannel, 物理控制格 式指示信道）信道上的信息用于指示 PDCCH占用的 OFDM符号数， 接收端 通过接收并解析 PCFICH信道的信息， 即可以确定用于 PDCCH的 OFDM符 号个数。但是接收端并不接收解析 PDCCH中的控制信息本身，只接收 PCFICH 信道的信息并进行解析。  The information on the PCFICH (Physical Control Format Indicator Channel) channel in the subframe is used to indicate the number of OFDM symbols occupied by the PDCCH, and the receiving end can determine the OFDM for the PDCCH by receiving and parsing the information of the PCFICH channel. The number of symbols. However, the receiving end does not receive the control information itself in the PDCCH, and only receives the information of the PCFICH channel and parses it.
此外， 还可以通过高层信令指示接收端在一定周期内 （如 320ms ) 的承 通过 MBMS业务的动态调度信息（ Dynamic Scheduling Information ) 、 MCCH ( Multicast Control Channel, 多播控制信道 )信息或 BCCH ( Broadcast Control Channel, 广播控制信道）信息等高层信令， 则接收端接收到高层信令后即可 获知一定周期内承载 MBMS业务的 MBSFN子帧 PDCCH占用的 OFDM的符 号数。 另外， 接收端确定承载 MBMS业务的 MBSFN子帧上 PDCCH 占用的 OFDM符号数的方法包括： In addition, the high-level signaling may be used to indicate that the receiving end passes the Dynamic Scheduling Information, the MCCH (Multicast Control Channel) information, or the BCCH (Broadcast Control Channel) information of the MBMS service within a certain period (for example, 320 ms). After the high-level signaling such as the control channel, the broadcast control channel, the receiving end can obtain the number of symbols of the OFDM occupied by the MBSFN subframe PDCCH carrying the MBMS service in a certain period. In addition, the method for the receiving end to determine the number of OFDM symbols occupied by the PDCCH on the MBSFN subframe that carries the MBMS service includes:
接收端通过接收某一 MBSFN区域内某一承载 MBMS业务的 MBSFN子 帧 （也就是 LTE中构成该 MBSFN区域的物理多播信道（Physical Multicast Channel, PMCH )的子帧）的 PCFICH来确定该 MBSFN区域内所述 MBSFN 子帧所在的 BCCH修改周期内所有 MBSFN子帧的 PDCCH占用的 OFDM符 号数。 进一步地， 接收端可以通过监听寻呼消息（ paging message ) 中***信 息修改（ systemlnfoModification )参数， 来确定下一个 BCCH修改周期内所述 MBSFN区域内的 MBSFN子帧的 PDCCH占用的 OFDM符号数是否发生变 化。 如果 systemlnfoModification参数不存在， 则说明下一个 BCCH修改周期 内所述 MBSFN区域内的 MBSFN子帧的 PDCCH占用的 OFDM符号数不发 生变化， 如果 systemlnfoModification参数存在， 则说明下一个 BCCH修改周 期内所述 MBSFN区域内的 MBSFN子帧的 PDCCH占用的 OFDM符号数可 能发生变化， 那么此时， 接收端需要在下一个 BCCH修改周期内重新接收该 MBSFN区域内第一个 MBSFN子帧来确定该 MBSFN区域所有的 MBSFN子 帧的 PDCCH占用的 OFDM符号数。  The receiving end determines the MBSFN area by receiving a PCFICH of an MBSFN subframe (that is, a subframe of a Physical Multicast Channel (PMCH) constituting the MBSFN area in the LTE) in a certain MBSFN area. The number of OFDM symbols occupied by the PDCCHs of all MBSFN subframes in the BCCH modification period in which the MBSFN subframe is located. Further, the receiving end may determine whether the number of OFDM symbols occupied by the PDCCH of the MBSFN subframe in the MBSFN area in the next BCCH modification period occurs by monitoring the system information modification (systemlnfoModification) parameter in the paging message. Variety. If the systemlnfoModification parameter does not exist, the number of OFDM symbols occupied by the PDCCH of the MBSFN subframe in the MBSFN area in the next BCCH modification period does not change. If the systemInfoModification parameter exists, the MBSFN in the next BCCH modification period is indicated. The number of OFDM symbols occupied by the PDCCH of the MBSFN subframe in the area may change. In this case, the receiving end needs to re-receive the first MBSFN subframe in the MBSFN area in the next BCCH modification period to determine all MBSFNs in the MBSFN area. The number of OFDM symbols occupied by the PDCCH of the subframe.
b )确定待接收子帧内业务数据的资源占用情况，具体为，根据承载 MBMS 业务的子帧内 PDCCH占用的 OFDM符号数确定业务数据占用的 OFDM符号 数；  And determining, according to the number of OFDM symbols occupied by the PDCCH in the subframe that carries the MBMS service, the number of OFDM symbols occupied by the service data;
在待接收子帧总的 OFDM符号中去掉用于发送 PDCCH的 OFDM符号 后，如果剩余的 OFDM符号中部分资源上承载有重要的***消息，例如 BCCH 信息、 导频时， 则再去掉这部分消息占用的资源， 剩余的资源即为用于传输 业务数据的资源； 如果子帧内剩余的 OFDM符号没有上述 BCCH***消息、 导频， 则子帧内剩余的 OFDM符号全部为用于传输业务数据的资源；  After the OFDM symbol for transmitting the PDCCH is removed from the total OFDM symbol of the subframe to be received, if some of the remaining OFDM symbols carry important system messages, such as BCCH information and pilots, the message is removed. The remaining resources are the resources used to transmit the service data. If the remaining OFDM symbols in the subframe do not have the BCCH system message and pilot, the remaining OFDM symbols in the subframe are all used for transmitting service data. Resource
c )接收并解析业务数据， 具体为， 在承载业务数据的资源上接收业务数 据后， 对接收到的数据进行解码等操作， 以获取有效的业务数据。  c) receiving and parsing the service data, specifically, after receiving the service data on the resource carrying the service data, performing decoding operations on the received data to obtain valid service data.
其中， 所述业务数据包括 MBMS业务数据、 定位业务（Positioning )数 据， 所述定位业务数据即为用于帮助 UE定位的数据， 在 LTE中即为定位参 考信号 ( ositioning reference signals ) 。 下面结合附图及具体实施例对本发明技术方案作进一步详细描述。 The service data includes MBMS service data and positioning service data, and the positioning service data is data for assisting UE positioning, and is ositioning reference signals in LTE. The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings and specific embodiments.
为了配合实施例我们假设一些必要的技术， 解释一些必要的概念， 这样 便于描述我们的发明内容， 下面的假设只是一种具体的情况， 不排除其他和 假设类似的情况。  In order to cooperate with the embodiment, we assume some necessary techniques and explain some necessary concepts to facilitate the description of our invention. The following assumptions are only a specific case, and other situations similar to the assumptions are not excluded.
LTE中的一个子帧的 OFDM符号是有限的，同一类型的子帧的总 OFDM 符号数是固定的。 当使用扩展循环前缀时子帧内有 12个 OFDM符号， 当使 用标准循环前缀时子帧内有 14个 OFDM符号。 接收端可以通过相关信息获 取该子帧使用的循环前缀情况， 因此接收端可以得知每个子帧的总共的 OFDM符号数。  The OFDM symbol of one subframe in LTE is limited, and the total number of OFDM symbols of the same type of subframe is fixed. When the extended cyclic prefix is used, there are 12 OFDM symbols in the subframe, and when the standard cyclic prefix is used, there are 14 OFDM symbols in the subframe. The receiving end can obtain the cyclic prefix condition used by the subframe by using related information, so the receiving end can know the total number of OFDM symbols of each subframe.
LTE***中， 在每个子帧的第一个 OFDM符号上承载 PCFICH信道， 该 PCFICH信道的信息是用于指示 PDCCH占用的 OFDM符号个数的， 每个小 区的 PCFICH信道位于第一个 OFDM符号上的固定位置， 这个固定位置和小 区 ID (标识）有关系， 因小区 ID不同而有差异。 总之， 终端是可以获知每 个子帧中 PCFICH信道的位置信息的。  In the LTE system, the PCFICH channel is carried on the first OFDM symbol of each subframe, and the information of the PCFICH channel is used to indicate the number of OFDM symbols occupied by the PDCCH, and the PCFICH channel of each cell is located on the first OFDM symbol. The fixed location, this fixed location is related to the cell ID (identification), and varies depending on the cell ID. In summary, the terminal can know the location information of the PCFICH channel in each subframe.
实施例一  Embodiment 1
本实施例描述了当使用 PCFICH承载 PDCCH占用的 OFDM符号数时， 接收端如何在子帧的数据域中接收到 MBMS业务数据的过程。  This embodiment describes a procedure of how the receiving end receives MBMS service data in the data domain of the subframe when the PCFICH is used to carry the number of OFDM symbols occupied by the PDCCH.
根据已有技术， 在 LTE R9中 , MBMS业务被承载在 MBSFN子帧中， 目前协议规定每个 MBSFN子帧的前面的 1 个或者 2 个 OFDM符号数为 PDCCH使用， 以便于单播业务的正常传输。 这样， 一个承载 MBMS业务的 MBSFN子帧的前面最多 2 个 OFDM符号发送 PDCCH, 但是后面的剩余 OFDM符号上不发送单播业务数据， 而是发送 MBMS业务数据。  According to the prior art, in the LTE R9, the MBMS service is carried in the MBSFN subframe. The current protocol specifies that the first one or two OFDM symbols of each MBSFN subframe are used for the PDCCH, so that the unicast service is normal. transmission. In this way, up to 2 OFDM symbols of the MBSFN subframe carrying the MBMS service transmit the PDCCH, but the subsequent remaining OFDM symbols do not send the unicast service data, but transmit the MBMS service data.
本实施例中，假设接收端已经确定了需要接收的某一 MBMS业务， 并且 进一步已经确定了该 MBMS业务所在的一系列 MBSFN子帧， 则接收端接收 该 MBMS业务数据的过程如下：  In this embodiment, assuming that the receiving end has determined a certain MBMS service to be received, and further has determined a series of MBSFN subframes in which the MBMS service is located, the receiving end receives the MBMS service data as follows:
步骤 101 , 接收端确定待接收的 MBSFN子帧内用于 PDCCH的 OFDM 符号数； 收待接收的每个 MBSFN子帧的第一个 OFDM符号中的 PCFICH信道的信息， 解析其中信息， 从而获知该子帧中 PDCCH占用的 OFDM符号数。 Step 101: The receiving end determines the number of OFDM symbols used for the PDCCH in the MBSFN subframe to be received. Receiving information of the PCFICH channel in the first OFDM symbol of each MBSFN subframe received, and parsing the information therein, thereby obtaining the number of OFDM symbols occupied by the PDCCH in the subframe.
其中， 接收端在解析 PCFICH的同时， 一直在继续接收后面的 OFDM符 号数据， 因为如果接收端在解析过程中不接收后续的 OFDM符号， 则由于解 析 PCFICH需要时延， 会造成后面的 OFDM符号数据丟失。  The receiving end continues to receive the following OFDM symbol data while parsing the PCFICH, because if the receiving end does not receive the subsequent OFDM symbol in the parsing process, the delay of the parsing of the PCFICH may cause subsequent OFDM symbol data. Lost.
此外， 本发明还可以通过高层信令通知接收端确定待接收的 MBSFN子 帧中 PDCCH占用的 OFDM符号。 因此， 在本发明其他实施例中， 接收端还 可以根据接收到的高层信令来确定 PDCCH占用的 OFDM符号数， 从而可以 间接获知子帧内用于 MBMS业务的 OFDM符号数， 而不必在接收的每一个 MBSFN子帧中确定该子帧中 PDCCH占用的 OFDM符号数。  In addition, the present invention can also notify the receiving end through high layer signaling to determine the OFDM symbol occupied by the PDCCH in the MBSFN subframe to be received. Therefore, in other embodiments of the present invention, the receiving end may further determine the number of OFDM symbols occupied by the PDCCH according to the received high layer signaling, so that the number of OFDM symbols used for the MBMS service in the subframe may be indirectly obtained without receiving The number of OFDM symbols occupied by the PDCCH in the subframe is determined in each MBSFN subframe.
本实施例中假设 PDCCH在该子帧中占用 1个 OFDM符号。 当 PDCCH 占用一个 OFDM符号时， 为了进一步利用资源， 第 2个 OFDM符号上可以 用来发送 MBMS业务。  It is assumed in this embodiment that the PDCCH occupies 1 OFDM symbol in the subframe. When the PDCCH occupies one OFDM symbol, in order to further utilize resources, the second OFDM symbol can be used to transmit the MBMS service.
步骤 102, 接收端确定待接收的 MBMS子帧内业务数据占用的符号数； 接收端根据协议的规定， 获知 MBSFN子帧使用扩展循环前缀， 因此共 有 12个 OFDM符号。 由于 MBMS业务数据不用于承载 BCCH, 因此本实施 例中， 无需考虑是否有重要的***消息， 这样， 除去第一个 OFDM符号外， 该子帧后面的 11个 OFDM符号资源都用于承载接收端即将接收的 MBMS业 务数据， 如果后面 11个符号中有承载导频， 则不包含导频占用的资源。  Step 102: The receiving end determines the number of symbols occupied by the service data in the MBMS subframe to be received. The receiving end learns that the MBSFN subframe uses the extended cyclic prefix according to the protocol, and thus has a total of 12 OFDM symbols. Since the MBMS service data is not used to carry the BCCH, in this embodiment, it is not necessary to consider whether there is an important system message. Thus, except for the first OFDM symbol, 11 OFDM symbol resources behind the subframe are used for the bearer receiving end. The MBMS service data to be received does not include the resources occupied by the pilot if there are bearer pilots in the next 11 symbols.
步骤 103 , 接收端继续接收该子帧内的所有 OFDM符号上的数据， 最后 根据 MBMS业务的相关控制信息对接收到的 MBMS业务数据进行解析， 包 括信道估计、 解码等， 最终获取有效的 MBMS业务数据。  Step 103: The receiving end continues to receive data on all OFDM symbols in the subframe, and finally parses the received MBMS service data according to the related control information of the MBMS service, including channel estimation, decoding, etc., to finally obtain an effective MBMS service. data.
实施例二  Embodiment 2
本实施例描述了当使用 PCFICH结合 BCCH修改周期确定某一 MBSFN 区域内所有承载 MBMS业务的 MBSFN子帧的 PDCCH占用的 OFDM个数时， 接收端如何在子帧的数据域中接收到 MBMS业务数据的过程。  This embodiment describes how the receiving end receives the MBMS service data in the data domain of the subframe when the PCFICH is used in conjunction with the BCCH modification period to determine the OFDM number of the PDCCHs of all the MBSFN subframes carrying the MBMS service in a certain MBSFN area. the process of.
根据已有技术， 在 LTE R9中 , MBMS业务被承载在 MBSFN子帧中， 目前协议规定每个 MBSFN子帧的前面的 1 个或者 2 个 OFDM符号数为 PDCCH使用， 以便于单播业务的正常传输。 这样， 一个承载 MBMS业务的 MBSFN子帧的前面最多 2 个 OFDM符号发送 PDCCH, 但是后面的剩余 OFDM符号上不发送单播业务数据， 而是发送 MBMS业务数据。 According to the prior art, in LTE R9, the MBMS service is carried in the MBSFN subframe, and the current protocol specifies that the first one or two OFDM symbols of each MBSFN subframe is The PDCCH is used to facilitate normal transmission of unicast traffic. In this way, up to 2 OFDM symbols of the MBSFN subframe carrying the MBMS service are sent to the PDCCH, but the unicast service data is not transmitted on the remaining OFDM symbols, but the MBMS service data is transmitted.
在一个 MBSFN 区域中， 通过 MCH 调度信息 （ MCH Scheduling Information )指示那些 MBSFN子帧用于 PMCH传输。  In an MBSFN area, MCH Scheduling Information is used to indicate which MBSFN subframes are used for PMCH transmission.
本实施例中， 假设接收端已经确定了需要接收某一 MBSFN区域内的某 一 MBMS业务，并且进一步已经确定了该 MBMS业务所在的一系列 MBSFN 子帧， 则接收端接收该 MBMS业务数据的过程如下：  In this embodiment, assuming that the receiving end has determined that it needs to receive a certain MBMS service in a certain MBSFN area, and further has determined a series of MBSFN subframes in which the MBMS service is located, the receiving end receives the MBMS service data. as follows:
步骤 201 , 接收端确定待接收的 MBSFN子帧内用于 PDCCH的 OFDM 符号数；  Step 201: The receiving end determines the number of OFDM symbols used for the PDCCH in the MBSFN subframe to be received.
接收端可以釆用以下方法确定 PDCCH 占用的 OFDM符号数： 在每个 BCCH修改周期内，在该 MBSFN区域内某一 MBSFN子帧中的 PCFICH信息， 解析其中信息， 从而获知该 BCCH修改周期内所述 MBSFN区域内所有用于 PMCH传输的 MBSFN子帧的 PDCCH占用的 OFDM符号数。 即该 BCCH修 占用的 OFDM符号数相同。 优选地， 接收 BCCH修改周期内该 MBSFN区域 内接收端感兴趣的 MBMS业务所在的 MBSFN子帧中第一个 MBSFN子帧的 PCFICH, 从而确定该 BCCH修改周期内， 该接收端感兴趣的 MBMS业务所 占用的所有 MBSFN子帧的 OFDM符号数。  The receiving end may determine the number of OFDM symbols occupied by the PDCCH by using the following method: in each BCCH modification period, parsing the information in the PCFICH information in a certain MBSFN subframe in the MBSFN area, thereby obtaining the BCCH modification period. The number of OFDM symbols occupied by the PDCCHs of all MBSFN subframes used for PMCH transmission in the MBSFN area. That is, the number of OFDM symbols occupied by the BCCH repair is the same. Preferably, the PCFICH of the first MBSFN subframe in the MBSFN subframe in which the MBMS service in the MBSFN area is located in the MBSFN area is received in the BCCH modification period, so as to determine the MBMS service that is interested in the receiving end in the BCCH modification period. The number of OFDM symbols of all MBSFN subframes occupied.
进一步地， 接收端可以通过监听寻呼消息 （ paging message ) 中 systemlnfoModification参数， 来确定下一个 BCCH修改周期内所述 MBSFN 数是否发生变化。 如果 systemlnfoModification参数不存在（该参数如果存在， 表示 BCCH在下一个修改周期内发生更新， 如果不存在， 则不发生更新） ， 那么下一个 BCCH修改周期内所述 MBSFN区域内所述 MBMS业务所在的 MBSFN 子帧的 PDCCH 占用的 OFDM 符号数不发生变化， 如果 systemlnfoModification参数存在， 那么说明下一个 BCCH修改周期内所述 MBSFN区域内所述 MBMS业务所在的 MBSFN子帧的 PDCCH占用的 OFDM 符号数可能发生变化， 那么此时， 接收端需要在下一个 BCCH修改周期内重 新接收该 MBSFN区域内所述 MBMS业务所在的第一个 MBSFN子帧来确定 该 BCCH修改周期内该 MBSFN区域所述 MBMS业务所在的 MBSFN子帧的 PDCCH占用的 OFDM符号数。 Further, the receiving end can determine whether the number of MBSFN changes in the next BCCH modification period by monitoring the systemlnfoModification parameter in the paging message. If the systemlnfoModification parameter does not exist (if the parameter exists, it indicates that the BCCH is updated in the next modification period, if it does not exist, the update does not occur), then the MBSFN where the MBMS service is located in the MBSFN area in the next BCCH modification period The number of OFDM symbols occupied by the PDCCH of the subframe does not change. If the systemInfo parameter is present, the number of OFDM symbols occupied by the PDCCH of the MBSFN subframe in the MBSFN area in the next BCCH modification period may change. , then, at this time, the receiver needs to be heavy in the next BCCH modification period. The first MBSFN subframe in which the MBMS service is located in the MBSFN area is newly received to determine the number of OFDM symbols occupied by the PDCCH of the MBSFN subframe in which the MBMS service is located in the MBSFN area.
其中，接收端在解析 PCFICH的同时，一直在继续接收子帧后面的 OFDM 符号数据， 因为如果接收端在解析过程中不接收后续的 OFDM符号， 则由于 解析 PCFICH需要时延， 会造成后面的 OFDM符号数据丟失。  The receiving end continues to receive the OFDM symbol data subsequent to the subframe while parsing the PCFICH, because if the receiving end does not receive the subsequent OFDM symbol in the parsing process, the delay of the parsing of the PCFICH may result in the following OFDM. Symbol data is lost.
通过上面的方式， 接收端通过接收一次 PCFICH, 就可以确定自己感兴 趣的 MBMS 业务在一个 BCCH修改周期所占用的所有 MBSFN 子帧的 PDCCH占用的 OFDM符号数。  In the above manner, the receiving end can determine the number of OFDM symbols occupied by the PDCCH of all MBSFN subframes occupied by the MBMS service that is of interest to one MBC service by receiving the PCFICH once.
步骤 202, 接收端确定待接收的 MBMS子帧内业务数据占用的符号数； 接收端根据协议的规定， 可以获知所有的 MBSFN子帧使用的循环前缀， 因此可以获知每个 MBSFN子帧共有 OFDM符号个数。 接收端使用自己感兴  Step 202: The receiving end determines the number of symbols occupied by the service data in the MBMS subframe to be received. The receiving end can learn the cyclic prefix used by all the MBSFN subframes according to the protocol, so that the OFDM symbol is shared by each MBSFN subframe. Number. The receiving end uses its own feelings
OFDM符号数，剩余的 OFDM符号就是承载接收端感兴趣的 MBMS业务的。 根据上述的确定每个 MBSFN子帧的 OFDM符号数的方法， 接收端一次可以 获知一个 BCCH修改周期内接收端感兴趣的 MBMS业务所在的 MBSFN子帧 中 MBMS业务占用的 OFDM符号数。 The number of OFDM symbols, the remaining OFDM symbols are the MBMS services that are of interest to the receiving end. According to the above method for determining the number of OFDM symbols of each MBSFN subframe, the receiving end can know the number of OFDM symbols occupied by the MBMS service in the MBSFN subframe in which the MBMS service of the receiver is interested in a BCCH modification period.
步骤 203 , 接收端根据获知的所要接收的 MBSFN子帧中 MBMS业务使 用的 OFDM符号情况， 接收自己感兴趣的 MBMS业务所在的 OFDM符号中 的数据， 并进行解析， 包括信道估计、 解码等， 最终获取有效的 MBMS业务 数据。  Step 203: The receiving end receives, according to the learned OFDM symbol used by the MBMS service in the MBSFN subframe to be received, the data in the OFDM symbol in which the MBMS service of the MBMS service is located, and performs analysis, including channel estimation, decoding, and the like. Obtain valid MBMS business data.
本实施例中， 接收端感兴趣的 MBMS业务只是满足预定条件的 MBMS 业务的一种形式， 该预定条件可以根据需要进行设置。  In this embodiment, the MBMS service that is of interest to the receiving end is only one form of the MBMS service that satisfies the predetermined condition, and the predetermined condition can be set as needed.
实施例三  Embodiment 3
本实施例描述了当使用 PCFICH承载 PDCCH占用的 OFDM符号数时， 接收端如何在子帧的数据域中接收到定位业务数据（即用于定位的数据， 在 LTE中为定位参考信号） 的过程。  This embodiment describes how the receiving end receives the positioning service data (that is, the data for positioning and the positioning reference signal in LTE) in the data domain of the subframe when the PCFICH is used to carry the number of OFDM symbols occupied by the PDCCH. .
根据已有技术， 在 LTE R9中， 定位业务使用整个子帧的数据域进行承 载， 没有在该子帧的控制域中发送定位业务相关的控制信息。 因此， 子帧的 控制域到底使用了几个 OFDM符号（有时使用一个 OFDM符号， 有时使用 2 个或者其他个数）为子帧的控制域（PDCCH ) , 对于接收定位业务的接收端 是必须知道的， 因为这直接影响到子帧后面数据域占用的 OFDM符号数。 According to the prior art, in LTE R9, the positioning service uses the data domain of the entire subframe to carry on The control information related to the positioning service is not sent in the control domain of the subframe. Therefore, the control field of the subframe uses several OFDM symbols (sometimes using one OFDM symbol, sometimes using 2 or other numbers) as the control domain (PDCCH) of the subframe, and the receiving end of the receiving positioning service must know Because this directly affects the number of OFDM symbols occupied by the data field after the subframe.
PCFICH用于指示子帧的 PDCCH占用几个 OFDM符号， 也间接告知了 该子帧数据域是从哪个 OFDM符号开始的。  The PCFICH is used to indicate that the PDCCH of the subframe occupies several OFDM symbols, and also indirectly informs which OFDM symbol the subframe data field starts from.
本实施例中， 假设接收端已经确定了需要在某一子帧上接收定位业务数 据， 并且已经知道是哪个子帧了， 则接收端接收定位业务数据的过程如下： 步骤 301 , 接收端确定待接收的子帧内用于 PDCCH的 OFDM符号数； 接收端接收子帧的第 1个 OFDM符号中的 PCFICH信道的信息， 解析其 中信息， 从而获知该子帧中 PDCCH占用的 OFDM符号数。  In this embodiment, assuming that the receiving end has determined that the positioning service data needs to be received in a certain subframe, and the subframe is already known, the process of receiving the positioning service data by the receiving end is as follows: Step 301: The receiving end determines to wait The number of OFDM symbols used for the PDCCH in the received subframe; the receiving end receives the information of the PCFICH channel in the first OFDM symbol of the subframe, and parses the information therein to obtain the number of OFDM symbols occupied by the PDCCH in the subframe.
其中， 接收端在解析 PCFICH的同时， 一直在继续接收后面 OFDM符号 的数据。  The receiving end continues to receive data of the following OFDM symbols while parsing the PCFICH.
本实施例中假设 PDCCH在该子帧中占用 1个 OFDM符号。  It is assumed in this embodiment that the PDCCH occupies 1 OFDM symbol in the subframe.
步骤 302, 接收端确定待接收子帧内定位业务数据占用的符号数； 接收端通过子帧总的 OFDM符号数减去 PDCCH占用 OFDM符号数，剩 余的 OFDM 即为定位业务数据占用的 OFDM符号。 这些承载定位业务的 OFDM符号中， 如果有重要的***消息， 例如 BCCH, 导频， 则还要去掉这 部分占用的部分资源； 如果这些承载定位业务的 OFDM符号中没有重要的系 统消息， 则不用去掉该部分资源。 子帧总的 OFDM符号数， 接收端可以根据 现有协议规定获知。  Step 302: The receiving end determines the number of symbols occupied by the positioning service data in the subframe to be received. The receiving end subtracts the number of OFDM symbols occupied by the PDCCH by the total number of OFDM symbols of the subframe, and the remaining OFDM is the OFDM symbol occupied by the positioning service data. In the OFDM symbols carrying the positioning service, if there are important system messages, such as BCCH, pilot, then some of the resources occupied by this part are also removed; if there are no important system messages in the OFDM symbols carrying the positioning service, then Remove some of this resource. The total number of OFDM symbols of the subframe, which can be learned by the receiving end according to the existing protocol.
步骤 303 , 接收端继续接收该子帧内的所有 OFDM符号上的数据， 最后 根据定位业务数据的相关控制信息对接收到的定位业务数据进行解析， 包括 信道估计、 解码等， 最终获取有效的定位业务数据。  Step 303: The receiving end continues to receive data on all OFDM symbols in the subframe, and finally parses the received positioning service data according to related control information of the positioning service data, including channel estimation, decoding, etc., to finally obtain effective positioning. Business data.
如图 2所示， 本发明实施例提供的业务数据的接收*** 2, 包括资源占 用信息单元 21和接收单元 22, 其中：  As shown in FIG. 2, the service data receiving system 2 provided by the embodiment of the present invention includes a resource occupation information unit 21 and a receiving unit 22, where:
资源占用信息单元设置为 ,确定待接收子帧内控制信息的资源占用信息 , 并根据控制信息的资源占用信息确定子帧内业务数据的资源占用信息， 并将 所述业务数据的资源占用信息发送给接收单元； The resource occupation information unit is configured to determine resource occupation information of the control information in the subframe to be received, and determine resource occupation information of the service data in the subframe according to the resource occupation information of the control information, and The resource occupation information of the service data is sent to the receiving unit;
接收单元设置为， 根据所述业务数据的资源占用信息接收并解析业务数 据。  The receiving unit is configured to receive and parse the service data according to the resource occupation information of the service data.
进一步地， 上述控制信息是指 PDCCH, 资源占用信息是指 PDCCH占用 所述子帧的正交频分复用 OFDM符号数， 资源占用信息单元是设置为：  Further, the foregoing control information refers to a PDCCH, and the resource occupation information refers to the number of orthogonal frequency division multiplexing OFDM symbols occupied by the PDCCH in the subframe, and the resource occupation information unit is set to:
接收并解析每个子帧的第一个 OFDM符号中的 PCFICH上的信息；或者， 通过接收到的高层信令中包含的指示所述 PDCCH占用的 OFDM符号数的信 息， 以确定 PDCCH占用的 OFDM符号数；  Receiving and parsing the information on the PCFICH in the first OFDM symbol of each subframe; or determining the OFDM symbol occupied by the PDCCH by using the information indicating the number of OFDM symbols occupied by the PDCCH included in the received higher layer signaling Number
再判断该子帧内是否有重要的***消息、 导频， 如果没有， 则将该子帧 的总 OFDM符号数减去 PDCCH占用的 OFDM符号数，即得到业务数据占用 的 OFDM符号数； 如果有， 则将该子帧的总 OFDM符号数减去 PDCCH占用 的 OFDM符号数后， 再减去该重要的***消息、 导频在 OFDM符号中占用 的资源， 即得到所述业务数据占用的资源。  And determining whether there are important system messages and pilots in the subframe, if not, subtracting the total number of OFDM symbols of the subframe from the number of OFDM symbols occupied by the PDCCH, that is, obtaining the number of OFDM symbols occupied by the service data; Then, the total number of OFDM symbols of the subframe is subtracted from the number of OFDM symbols occupied by the PDCCH, and then the important system message and the resources occupied by the pilot in the OFDM symbol are subtracted, that is, the resources occupied by the service data are obtained.
该接收***可应用于 MBMS业务的接收端等。  The receiving system can be applied to a receiving end of an MBMS service or the like.
另外， 上述***中的资源占用信息单元和接收单元的具体实现过程参见 上述方法实施例中的相关描述， 在此不赘述。  In addition, for the specific implementation process of the resource occupation information unit and the receiving unit in the foregoing system, refer to the related description in the foregoing method embodiments, and details are not described herein.
本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序 来指令相关硬件完成， 所述程序可以存储于计算机可读存储介质中， 如只读 存储器、 磁盘或光盘等。 可选地， 上述实施例的全部或部分步骤也可以使用 一个或多个集成电路来实现。 相应地， 上述实施例中的各模块 /单元可以釆用 硬件的形式实现， 也可以釆用软件功能模块的形式实现。 本发明不限制于任 何特定形式的硬件和软件的结合。  One of ordinary skill in the art will appreciate that all or a portion of the steps above may be accomplished by a program to instruct the associated hardware, such as a read-only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware or in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.
当然， 本发明还可有其他多种实施例， 例如， 所述的子帧除 MBSFN子 帧外， 也可以包括其他非 MBSFN子帧， 多播业务子帧的 PCFICH都是存在 于子帧中第一个 OFDM符号中， 且多播业务子帧的总的 OFDM符号数也是 相对固定的， 为 12个或者 14个。 本发明中举例应用于 MBMS业务和定位业 务， 但是不局限于这两类业务。 因此， 本发明流程同样适用。 在不背离本发 明精神及其实质的情况下， 熟悉本领域的技术人员可根据本发明做出各种相 应的改变和变形， 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。 Of course, the present invention may have other various embodiments. For example, the subframe may include other non-MBSFN subframes in addition to the MBSFN subframe, and the PCFICH of the multicast service subframe exists in the subframe. In one OFDM symbol, and the total number of OFDM symbols of the multicast service subframe is also relatively fixed, being 12 or 14. The present invention is applied to the MBMS service and the positioning service by way of example, but is not limited to these two types of services. Therefore, the flow of the present invention is equally applicable. Those skilled in the art can make various phases in accordance with the present invention without departing from the spirit and scope of the present invention. All changes and modifications are intended to be included within the scope of the appended claims.
工业实用性 Industrial applicability
本发明提供的业务接收方法及***， 使接收端可以根据待接收业务数据 占用的资源情况对业务数据进行接收和解析， 因而可以实现目前 LTE R9系 统中的 MBMS业务数据的有效接收，从而不需要接收端盲目尝试解析业务数 据， 并且不需要对现有的发送端协议进行修改。  The service receiving method and system provided by the present invention enable the receiving end to receive and parse the service data according to the resource condition occupied by the service data to be received, so that the MBMS service data in the current LTE R9 system can be effectively received, thereby eliminating the need for The receiving end blindly attempts to parse the service data and does not need to modify the existing sender protocol.

Claims

权 利 要 求 书 Claim
1、 一种业务数据的接收方法， 包括：  1. A method for receiving service data, comprising:
接收端确定待接收子帧内控制信息的资源占用信息；  The receiving end determines resource occupation information of the control information in the subframe to be received;
根据所述控制信息的资源占用信息确定所述子帧内业务数据的资源占用 信息； 以及  Determining, according to the resource occupation information of the control information, resource occupation information of the service data in the subframe; and
根据所述业务数据的资源占用信息接收并解析所述业务数据。  Receiving and parsing the service data according to the resource occupation information of the service data.
2、 如权利要求 1所述的方法， 其中，  2. The method of claim 1 wherein
所述控制信息的资源占用信息是物理下行控制信道 PDCCH 占用所述子 帧的正交频分复用 OFDM符号数。  The resource occupation information of the control information is that the physical downlink control channel PDCCH occupies the number of orthogonal frequency division multiplexing OFDM symbols of the subframe.
3、 如权利要求 1所述的方法， 其中， 所述业务数据的资源占用信息是业  3. The method according to claim 1, wherein the resource occupation information of the service data is industry
4、 如权利要求 2所述的方法， 其中， 在所述接收端确定待接收子帧内控 制信息的资源占用信息的步骤中， 4. The method according to claim 2, wherein in the step of determining, by the receiving end, resource occupation information of the control information in the subframe to be received,
所述接收端通过如下方式确定待接收子帧内控制信息的资源占用信息： 接收并解析每个所述子帧的第一个 OFDM符号中的物理控制格式指示信 道 PCFICH上的信息， 以确定所述 PDCCH占用的 OFDM符号数； 或  The receiving end determines the resource occupation information of the control information in the subframe to be received by: receiving and parsing information on the physical control format indication channel PCFICH in the first OFDM symbol of each of the subframes to determine The number of OFDM symbols occupied by the PDCCH; or
通过接收到的高层信令中包含的指示所述 PDCCH占用的 OFDM符号数 的信息， 确定所述 PDCCH占用的 OFDM符号数； 或  Determining the number of OFDM symbols occupied by the PDCCH by using information indicating the number of OFDM symbols occupied by the PDCCH included in the received high layer signaling; or
通过接收预定 MBSFN区域内一 MBSFN子帧中的 PCFICH上的信息，确 定所述 MBSFN子帧所在的 BCCH修改周期内所述预定 MBSFN区域内所有 MBSFN子帧中的 PDCCH占用的 OFDM符号数。  The number of OFDM symbols occupied by the PDCCH in all MBSFN subframes in the predetermined MBSFN area in the BCCH modification period in which the MBSFN subframe is located is determined by receiving information on the PCFICH in a MBSFN subframe in the predetermined MBSFN area.
5、 如权利要求 4所述的方法， 其中， 在所述通过接收预定 MBSFN区域 内一 MBSFN子帧中的 PCFICH上的信息， 确定所述 MBSFN子帧所在的 用的 OFDM符号数的步骤中，  The method according to claim 4, wherein in the step of determining the number of OFDM symbols used by the MBSFN subframe by receiving information on a PCFICH in an MBSFN subframe in a predetermined MBSFN region,
接收 BCCH修改周期内所述预定 MBSFN区域内满足预定条件的 MBMS 业务所在的 MBSFN子帧中第一个 MBSFN子帧的 PCFICH上的信息，确定所 述 BCCH修改周期内， 所述 MBMS 业务所占用的所有 MBSFN子帧中的 PDCCH占用的 OFDM符号数。 Receiving information on the PCFICH of the first MBSFN subframe in the MBSFN subframe in which the MBMS service in the predetermined MBSFN area meets the predetermined condition in the BCCH modification period, and determining the location The number of OFDM symbols occupied by the PDCCH in all MBSFN subframes occupied by the MBMS service in the BCCH modification period.
6、 如权利要求 5所述的方法， 其中，  6. The method of claim 5, wherein
所述高层信令包括多媒体广播组播服务 MBMS业务的动态调度信息、多 播控制信道 MCCH信息或广播控制信道 BCCH信息。  The high layer signaling includes dynamic scheduling information of the MBMS service of the multimedia broadcast multicast service, multicast control channel MCCH information or broadcast control channel BCCH information.
7、 如权利要求 4或 5所述的方法， 其中， 在确定所述 MBSFN子帧所在 占用的 OFDM符号数的步骤中，  7. The method according to claim 4 or 5, wherein, in the step of determining the number of OFDM symbols occupied by the MBSFN subframe,
通过监听寻呼消息中***信息修改 systemlnfoModification参数来确定 PDCCH占用的 OFDM符号数。  The system lnfoModification parameter is modified by monitoring system information in the paging message to determine the number of OFDM symbols occupied by the PDCCH.
8、 如权利要求 4、 5 、 6或 7所述的方法， 其中， 所述根据所述控制信 息的资源占用信息确定所述子帧内业务数据的资源占用信息的步骤包括： 判断所述子帧内是否有***消息， 如果所述子帧内没有***消息， 则将 所述子帧的总 OFDM符号数减去所述 PDCCH占用的 OFDM符号数，即得到 所述业务数据占用的 OFDM符号数； 如果所述子帧内有***消息， 则将所述 子帧的总 OFDM符号数减去所述 PDCCH占用的 OFDM符号数后，再减去所 述***消息占用的 OFDM符号数或者占用的 OFDM符号内的资源， 得到所 述业务数据的资源占用信息。  The method according to claim 4, 5, 6 or 7, wherein the determining, according to the resource occupation information of the control information, the resource occupation information of the service data in the subframe comprises: determining the child Whether there is a system message in the frame, if there is no system message in the subframe, the number of OFDM symbols occupied by the PDCCH is subtracted from the total number of OFDM symbols of the subframe, that is, the number of OFDM symbols occupied by the service data is obtained. If there is a system message in the subframe, the number of OFDM symbols occupied by the PDCCH is subtracted from the total number of OFDM symbols of the subframe, and then the number of OFDM symbols occupied by the system message or occupied OFDM is subtracted. A resource within the symbol obtains resource occupation information of the service data.
9、 如权利要求 1、 2、 3、 4、 5、 6或 7所述的方法， 其中，  9. The method of claim 1, 2, 3, 4, 5, 6 or 7, wherein
所述子帧包括非多播组播单频网络 MBSFN子帧， 或用于承载 MBMS业 务的 MBSFN子帧。  The subframe includes a non-multicast multicast single frequency network MBSFN subframe, or an MBSFN subframe used to carry the MBMS service.
10、 如权利要求 8所述的方法， 其中，  10. The method of claim 8 wherein
所述业务数据包括： MBMS业务数据和 /或定位业务数据。  The service data includes: MBMS service data and/or location service data.
11、 一种业务数据的接收***， 包括资源占用信息单元和接收单元， 其 中：  11. A receiving system for service data, comprising a resource occupancy information unit and a receiving unit, wherein:
所述资源占用信息单元设置为 , 确定待接收子帧内控制信息的资源占用 信息 , 根据所述控制信息的资源占用信息计算所述子帧内业务数据的资源占 用信息， 并将所述业务数据的资源占用信息发送给所述接收单元； 所述接收单元设置为， 根据所述业务数据的资源占用信息接收并解析所 述业务数据。 The resource occupation information unit is configured to determine resource occupation information of the control information in the subframe to be received, calculate resource occupation information of the service data in the subframe according to the resource occupation information of the control information, and calculate the service data. The resource occupation information is sent to the receiving unit; The receiving unit is configured to receive and parse the service data according to the resource occupation information of the service data.
12、 如权利要求 11所述的***， 其中，  12. The system of claim 11 wherein:
所述控制信息的资源占用信息是物理下行控制信道 PDCCH 占用所述子 帧的正交频分复用 OFDM符号数； 所述业务数据的资源占用信息是业务数据 所述资源占用信息单元是设置为：  The resource occupation information of the control information is that the physical downlink control channel PDCCH occupies the number of orthogonal frequency division multiplexing OFDM symbols of the subframe; the resource occupation information of the service data is service data, and the resource occupation information unit is set to :
接收并解析每个所述子帧的第一个 OFDM符号中的物理控制格式指示信 道 PCFICH上的信息；或者，通过接收到的高层信令中包含的指示所述 PDCCH 占用的 OFDM符号数的信息， 以确定所述 PDCCH占用的 OFDM符号数。  Receiving and parsing information on the physical control format indication channel PCFICH in the first OFDM symbol of each of the subframes; or, information indicating the number of OFDM symbols occupied by the PDCCH included in the received higher layer signaling And determining the number of OFDM symbols occupied by the PDCCH.
13、 如权利要求 12所述的***， 其中，  13. The system of claim 12, wherein
所述资源占用信息单元是设置为：  The resource occupation information unit is set to:
判断所述子帧内是否有***消息， 如果所述子帧内没有***消息， 则将 所述子帧的总 OFDM符号数减去所述 PDCCH占用的 OFDM符号数，即得到 所述业务数据占用的 OFDM符号数； 如果所述子帧内有***消息， 则将所述 子帧的总 OFDM符号数减去所述 PDCCH占用的 OFDM符号数后，再减去所 述***消息占用的 OFDM符号数或者占用的 OFDM符号内的资源， 得到所 述业务数据的资源占用信息。  Determining whether there is a system message in the subframe, if there is no system message in the subframe, subtracting the total number of OFDM symbols of the subframe from the number of OFDM symbols occupied by the PDCCH, that is, occupying the service data The number of OFDM symbols; if there is a system message in the subframe, subtracting the number of OFDM symbols occupied by the PDCCH by the total number of OFDM symbols of the subframe, and then subtracting the number of OFDM symbols occupied by the system message Or the resources in the occupied OFDM symbol, and the resource occupation information of the service data is obtained.
14、 如权利要求 11 、 12或 13所述的***， 其中，  14. The system of claim 11, 12 or 13, wherein
所述子帧包括非多播组播单频网络 MBSFN子帧， 或用于承载多媒体广 播组播服务 MBMS业务的 MBSFN子帧。  The subframe includes a non-multicast multicast single frequency network MBSFN subframe, or an MBSFN subframe for carrying a multimedia broadcast multicast service MBMS service.
15、 如权利要求 14所述的***， 其中，  15. The system of claim 14 wherein
所述业务数据包括： MBMS业务数据和 /或定位业务数据。  The service data includes: MBMS service data and/or location service data.
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