WO2011147246A1

WO2011147246A1 - Method and system for uplink resources allocation and feedback of multimedia broadcast multicast

Info

Publication number: WO2011147246A1
Application number: PCT/CN2011/073405
Authority: WO
Inventors: 苟伟; 毕峰
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-05-28
Filing date: 2011-04-27
Publication date: 2011-12-01
Also published as: CN102264038A; CN102264038B

Abstract

A method for uplink resources allocation and feedback of Multimedia Broadcast Multicast Service (MBMS) is disclosed by the present invention. The method comprises that a network side allocates uplink sub-frames and physical resources configured in the uplink sub-frames for uplink feedback for the MBMS, and notifies the uplink sub-frame indication information and/or information of the physical resources in the uplink sub-frames to a user equipment (UE) in a manner of stipulation, implication or signaling indication. A system for uplink resources allocation and feedback of MBMS is also disclosed by the present invention. The signaling overhead of the present invention is very low.

Description

Multimedia broadcast multicast uplink resource allocation and feedback method and system

The present invention relates to the field of Multimedia Broadcast Multicast Service (MBMS), and in particular, to an MBMS uplink resource allocation and feedback method.

BACKGROUND With the rapid development of the Internet and the popularization of large-screen multi-function mobile phones, a large number of mobile data multimedia services and various high-bandwidth multimedia services have appeared, such as: video conferencing, television broadcasting, video on demand, video advertising, online education, and Interactive games, etc., not only meet the rising business needs of mobile users, but 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 large data volume, long duration, and delay sensitivity. In order to effectively utilize mobile network resources, the 3rd Generation Partnership Projective (3GPP) proposed the Multimedia Broadcast Multicast Service (MBMS). MBMS is a technology that transfers data from one data source to multiple targets. It realizes the sharing of resources (including core network and access network) and improves the utilization of network resources (especially air interface resources). The MBMS service 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, and provide 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 3rd Generation (3G).

The MBMS is transmitted by the Multimedia Broadcast Multicast Service Single Frequency Network (MBSFN). The MBSFN mode is understood as a multi-cell joint transmission method, that is, the cells in a certain geographical location are in the same manner. The same MBMS data is sent on the same time and frequency resource. This certain geographical location is called "MBSFN area". The network side needs to know the reception status of an MBMS in an MBSFN area, that is, the How many User Equipments (UEs) are being received by the MBMS, or how many UEs are interested in the MBMS to be sent. When the network side knows that a certain MBMS is being sent, because no user is interested, no UE is receiving, then the network side can turn off the transmission of the MBMS, which can help the network side save time-frequency resources and save power. In the Long Term Evolution (LTE) system, the MBMS receives two states: one is the idle state (RRC_IDLE). In the idle state, the UE keeps the downlink and the network side synchronized, and the uplink does not necessarily correspond to the network. The other side is synchronized; the other is the connection status (RRC_CONNECTED). In the connected state, the UE keeps the downlink and uplink synchronized with the network side.

If the uplink and the network side are not synchronized, the UE may send the uplink data to the network side. Data, the network side can correctly receive and decode, and obtain the uplink data sent by the UE. Certainly, in some special cases for special purposes, the UE directly sends uplink data to the network side in an idle state, and the network side can obtain the purpose of transmitting uplink data by the UE through special processing. However, regardless of the uplink transmission mode, when the UE sends uplink data, each UE cannot blindly transmit data on any uplink resource, and specific resources should be allocated by the network side, so that when the data arrives at the network side, the network side can Know which data is sent by the UE and what it is used for. For the uplink feedback of the MBMS, it is also necessary to assign an uplink feedback resource to the MBMS-capable UE, so that the terminal performs the uplink data transmission of the MBMS. Then, for MBMS, how to design resource allocation, signaling of indication, and how the UE performs feedback becomes a problem that needs to be solved.

SUMMARY OF THE INVENTION The technical problem to be solved by the present invention is to provide a method and system for uplink resource allocation and feedback of a multimedia broadcast multicast service, which is used for flexible physical resource allocation of MBMS uplink feedback and utilization of allocated physical resources. Perform upstream feedback. In order to solve the above problem, the present invention proposes a multimedia broadcast multicast service (MBMS). The uplink resource allocation and the feedback method, the method includes: the network side allocates an uplink subframe for uplink feedback and a physical resource configured in the uplink subframe for the MBMS, and performs uplink subframe indication information and/or physical of the uplink subframe. The resource information informs the user device by way of agreement, or implicit, or signaling. The method further includes: the network side sending a feedback statistics message to the user equipment, where the feedback statistics message carries MBMS information used to notify the user equipment that the feedback count needs to be performed; and the uplink of the user equipment allocated by the network side The feedback information of the MBMS required by the network side is transmitted in the physical resources configured in the subframe and the uplink subframe. The uplink subframe indication information includes: one of uplink subframe position information or uplink subframe start position information, uplink subframe number information, and uplink subframe interval information, or a combination thereof;

The uplink subframe position information is used to describe the number of subframe intervals of the allocated uplink subframe and the downlink subframe in which the statistics message is sent, or to describe the allocated uplink subframe and multiple downlink subframes for sending the statistics message. The number of subframe intervals of the last downlink subframe; the uplink subframe start location information, used to describe the number of subframe intervals of the first uplink subframe in the allocated multiple uplink subframes and the downlink subframe in which the statistics message is sent Or for describing the number of subframe intervals of the first one of the plurality of uplink subframes and the last one of the plurality of downlink subframes that send the statistics message; the number of uplink subframes, The number of subframes describing the allocated uplink subframes; the uplink subframe interval, which is used to describe the number of subframe intervals or the subframe number difference between the allocated uplink subframes. In the step of the network side allocating the uplink subframe for the uplink feedback and the physical resource configured in the uplink subframe, where the network side allocates the uplink feedback resource for the multiple MBMS, the multiple MBMS points are allocated to the MBMS. An uplink subframe is allocated, and the same or different physical resources are allocated to the multiple MBMSs in the uplink subframe, where the uplink subframe indication information includes uplink subframe location information. When the network side allocates uplink feedback resources for multiple MBMSs in the step of allocating the uplink resources for the uplink feedback and the physical resources configured in the uplink subframe, the network side allocates multiple to the multiple MBMSs. An uplink subframe, where the multiple uplink subframes are consecutive or discrete uplink subframes; in the multiple consecutive or discrete uplink subframes, multiple MBMSs are allocated the same in each uplink subframe Or different physical resources, or in the plurality of consecutive or discrete uplink subframes, each uplink subframe is used for uplink feedback of one MBMS, and one corresponding MBMS is allocated in each uplink subframe. Or a plurality of physical resources for uplink feedback; when the plurality of uplink subframes are consecutive uplink subframes, the uplink subframe indication information includes uplink subframe start position information and uplink subframe number information; When the plurality of uplink subframes are discrete uplink subframes, the uplink subframe indication information includes an uplink subframe start position, an uplink subframe number, and an uplink subframe interval. When the network side allocates one uplink subframe to each MBMS, the network side notifies the number of uplink subframes allocated by the user equipment in a predetermined manner, and omits the number of uplink subframes in the uplink subframe indication information. Send; or,

The network side notifies the number of uplink subframes allocated by the user equipment in an implicit manner, and the number of uplink subframes is equal to the number of the plurality of MBMSs, and the number of uplink subframes in the uplink subframe indication information is omitted. . When the network side allocates uplink feedback resources for multiple MBMSs in the uplink subframe for the uplink feedback and the physical resources configured in the uplink subframe, the network side allocates uplink feedback for each MBMS. An uplink subframe, where the network side allocates physical resources for each MBMS in its corresponding uplink subframe; The uplink subframe indication information includes an uplink subframe start position corresponding to each MBMS. among them,

In the step of allocating an uplink subframe for uplink feedback and a physical resource configured in an uplink subframe, the network side allocates uplink feedback resources for multiple MBMSs, and allocates uplink feedback for each MBMS. a plurality of uplink subframes, where the multiple uplink subframes are consecutive or discrete uplink subframes, and the same or different physical resources are allocated to the MBMS in each of the uplink subframes; The step of transmitting the feedback information of the MBMS required by the network side in the uplink resource allocated by the side and the physical resource configured in the uplink subframe includes: after the user equipment receives the statistical feedback message, according to the agreed grouping rule The uplink subframe corresponding to the packet to which the packet belongs is calculated, and the physical resources in the uplink subframe and the subframe corresponding to the packet are subjected to MBMS feedback to the network side;

When the multiple uplink subframes are consecutive uplink subframes, the uplink subframe indication information includes an uplink subframe start position, an uplink subframe number, and a number of user equipment packets; the multiple uplink subframes. When the uplink subframe is a discrete uplink subframe, the uplink subframe indication information includes an uplink subframe start position, an uplink subframe number, an uplink subframe interval, and a number of user equipment groups. among them,

In the step of allocating the uplink subframe for the uplink feedback and the physical resource configured in the uplink subframe for the MBMS, when the network side allocates the uplink feedback resource for the multiple MBMS, only the multiple MBMSs are allocated for the uplink feedback. An uplink subframe in which the MBMS is allocated different physical resources; the uplink subframe indication information includes an uplink subframe start position and a number of user equipment groups; the user equipment is on the network side The step of transmitting the feedback information of the MBMS required by the network side in the allocated uplink subframe and the physical resources configured in the uplink subframe includes: after receiving the statistical feedback message, the user equipment calculates according to the agreed grouping rule The physical resource in the subframe corresponding to the packet to which the user belongs, and the physical resource corresponding to the packet performs MBMS on the network side Feedback. among them,

When the network side uses the signaling indication manner to notify the user equipment of the allocated uplink subframe indication information and/or the physical resource information in the uplink subframe: the statistical feedback message carries the uplink subframe indication information and/or The physical resource information in the uplink subframe; or, the statistic feedback message carries the uplink subframe indication information, and the radio network temporary identifier (RNTI) identifier used after the statistic message is sent is sent in the subsequent downlink subframe. Intra-frame physical resource information; or, the statistic feedback message carries the uplink sub-frame indication information, and uses the authorization information signaling to deliver the physical resource information in the uplink sub-frame. among them,

The physical resource is composed of a physical resource block as a basic unit; wherein each physical resource is a resource unit used for MBMS uplink feedback; the one physical resource is composed of one or more physical resource blocks, or is fixed by The number of subcarriers is composed. In order to solve the above problem, the present invention also provides a system for uplink resource allocation and feedback of a multimedia broadcast multicast service (MBMS), where the system includes a network side device and a user equipment, wherein the network side device is configured to: allocate for MBMS. The uplink subframe indication information and/or the physical resource information in the uplink subframe are notified to the user equipment by an agreed, or implicit, or signaling indication manner in the uplink subframe and the physical resource configured in the uplink subframe. among them,

The network side device is further configured to: send a feedback statistics message to the user equipment, where the feedback statistics message carries the MBMS information used to notify the user that the device needs to perform the feedback counting; the user equipment is configured to: obtain the network side device as the user setting The uplink subframes for uplink feedback and the physical resources configured in the uplink subframes are allocated on the network side. The feedback information of the MBMS required by the network side is transmitted in the physical resources configured in the downlink subframe and the uplink subframe. among them,

The uplink subframe indication information includes: one of uplink subframe position information or uplink subframe start position information, uplink subframe number information, and uplink subframe interval information, or a combination thereof;

The uplink subframe position information is used to describe the number of subframe intervals of the allocated uplink subframe and the downlink subframe in which the statistics message is sent, or to describe the allocated uplink subframe and multiple downlink subframes for sending the statistics message. The number of subframe intervals of the last downlink subframe; the uplink subframe start location information, used to describe the number of subframe intervals of the first uplink subframe in the allocated multiple uplink subframes and the downlink subframe in which the statistics message is sent Or for describing the number of subframe intervals of the first one of the plurality of uplink subframes and the last one of the plurality of downlink subframes that send the statistics message; the number of uplink subframes, The number of subframes describing the allocated uplink subframes; the uplink subframe interval, which is used to describe the number of subframe intervals or the subframe number difference between the allocated uplink subframes. among them,

When the network side device allocates uplink feedback resources for multiple MBMSs, each of the MBMSs is allocated multiple uplink subframes for uplink feedback, where the multiple uplink subframes are consecutive or discrete uplink subframes. All the uplink subframes are allocated with the same or different physical resources for the MBMS; after receiving the statistical feedback message, the user equipment calculates the uplink subframe corresponding to the packet to which the user belongs according to the agreed grouping rule. The uplink subframe corresponding to the packet and the physical resources in the subframe perform MBMS feedback to the network side;

When the plurality of uplink subframes are consecutive uplink subframes, the uplink subframe indication information includes an uplink subframe start position, an uplink subframe number, and a user equipment group number; When the plurality of uplink subframes are discrete uplink subframes, the uplink subframe indication information includes an uplink subframe start position, an uplink subframe number, an uplink subframe interval, and a number of user equipment groups. among them,

When the network side device allocates uplink feedback resources for multiple MBMSs, only one uplink subframe for uplink feedback is allocated to multiple MBMSs, and different physical resources are allocated to the MBMS in the uplink subframes; The frame indication information includes an uplink subframe start position and a number of user equipment groups. After receiving the statistical feedback message, the user equipment calculates, according to the agreed grouping rule, the physics in the subframe corresponding to the packet to which the user belongs. The resource performs MBMS feedback to the network side on the physical resource corresponding to the packet. among them,

When the network side device notifies the user equipment of the allocated uplink subframe indication information and the physical resource information in the uplink subframe by using a signaling indication manner:: using the statistical feedback message to carry the uplink subframe indication information and the uplink subframe The internal physical resource information; or, the statistical feedback message carries the uplink subframe indication information, and the radio network temporary identifier (RNTI) identifier used after the statistics message is sent is sent in the downlink subframe The resource information is used to transmit the uplink sub-frame indication information, and the authorization information signaling is used to deliver the physical resource information in the uplink sub-frame. among them,

When the network side device allocates the uplink feedback resource for the multiple MBMSs, allocate multiple uplink subframes to the multiple MBMSs, where the multiple uplink subframes are consecutive or discrete uplink subframes; In multiple consecutive or discrete uplink subframes, multiple MBMS services are allocated the same or different physical resources in each uplink subframe, or in the multiple consecutive or discrete uplink subframes, An uplink subframe is used for uplink feedback of one MBMS and is used for each uplink. One or more physical resources for uplink feedback are allocated to the corresponding MBMS in the subframe; when the multiple uplink subframes are consecutive uplink subframes, the uplink subframe indication information includes an uplink subframe start position. Information, and uplink subframe number information;

When the multiple uplink subframes are discrete uplink subframes, the uplink subframe indication information includes an uplink subframe start position, an uplink subframe number, and an uplink subframe interval. among them,

When the network side device allocates one uplink subframe to each MBMS, the network side device notifies the number of uplink subframes allocated by the user equipment in a predetermined manner, and omits the number of uplink subframes in the uplink subframe indication information. Or, the network side device notifies the number of uplink subframes allocated by the user equipment in an implicit manner, and the number of the default uplink subframes is equal to the number of the plurality of MBMSs, and the uplink information in the uplink subframe indication information is omitted. The number of subframes is sent. The network side device includes: one or more of a multi-cell coordination entity (MCE), a base station (eNB), a relay station, a broadcast multicast service center, and an MBMS gateway. The present invention can provide flexible MBMS uplink physical resource allocation, and the signaling overhead is very small by prior agreement or implied. The method of the UE packet feedback is also used in combination with the uplink feedback resource allocation mode, and the UE side can learn about the UE that is receiving the statistical MBMS by using the user packet feedback mode of the physical resource in the uplink subframe or the subframe. Order of magnitude information.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of allocating uplink subframes by using parameter K; FIG. 2 is a schematic diagram of allocating consecutive uplink subframes; FIG. 3 is a schematic diagram of allocating discrete uplink subframes; Schematic diagram of allocation; FIG. 5 is a schematic diagram of allocating multiple uplink subframes for one MBMS service; FIG. 6 is a flowchart of a method for uplink resource allocation and feedback of an MBMS according to an embodiment of the present invention.

The present invention will be further described in detail with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other. The MBMS uplink resource allocation method and system provided in the present invention provide a specific uplink subframe and a physical resource allocation scheme in a subframe for various allocation scenarios of the uplink feedback resource. The uplink feedback resource allocation scheme according to the present invention, combined with the feedback statistics message, can be directly applied to the MBMS uplink feedback statistics. Specifically, the MBMS uplink feedback statistics are: The network side sends a feedback statistics message for one or more MBMSs. After receiving the statistics message, the UE sends the corresponding information to the network side according to the content of the statistics message. The function of the statistics message is that the network side is used to notify the UEs of which MBMSs need to perform feedback counting, to determine whether these MBMSs are receiving UEs, or how many UEs are receiving, or which UEs are receiving, the main purpose is to determine MBMS UE reception status. The network side includes: a Multi-cell/Multicast Coordination Entity (MCE), a base station (eNodeB, eNB), a relay (relay), a Broadcast Multicast Service Center (BMSC), and an MBMS gateway. One or more of (MBMS Gateway, MBMS GW). The system for the uplink resource allocation and feedback of the multimedia broadcast multicast service of the present invention includes: a network side device and a user equipment, where: the network side device is configured to: allocate an uplink subframe and an uplink subframe for uplink feedback for the multimedia broadcast multicast service. The physical resource configured in the frame notifies the user equipment in the uplink subframe indication information and/or the physical resource information in the uplink subframe by using an agreed, or implicit, or signaling indication manner. The network side device is further configured to: send a feedback statistics message to the user equipment, where the feedback statistics message carries the MBMS information used to notify the user equipment that the feedback needs to be counted; the user equipment is configured to: obtain the network side device as the user equipment Allocated for upstream The fed back uplink subframe and the physical resources configured in the uplink subframe transmit the feedback information of the MBMS required by the network side in the uplink resources allocated by the network side and the physical resources configured in the uplink subframe. In the present invention, the specific signaling of the uplink resource allocation for the MBMS on the network side includes: uplink subframe information allocated by the network side, physical resource allocation information in the uplink subframe, and the like. Specifically, the uplink subframe information may include one of the following information or a combination thereof: uplink subframe position or start position information, uplink subframe interval information, and uplink subframe number information. The uplink subframe position information is used to describe the number of subframe intervals of the allocated uplink subframe and the downlink subframe in which the statistics message is sent, or to describe the allocated uplink subframe and multiple downlinks of the sent statistics message. The number of subframe intervals of the last downlink subframe in the frame; the uplink subframe start location information, used to describe the subframe of the first uplink subframe of the allocated multiple uplink subframes and the downlink subframe of the statistics message sent The number of intervals, or used to describe the number of subframe intervals of the first one of the plurality of uplink subframes and the last one of the plurality of downlink subframes that send the statistics message; the number of uplink subframes The number of subframes used to describe the allocated uplink subframes; the uplink subframe interval, which is used to describe the number of subframe intervals or the subframe number difference between the allocated uplink subframes. The network side allocates an uplink resource for the MBMS uplink feedback, and forms a specific signaling of the uplink resource allocation, and performs uplink feedback on the MBMS by using the allocated uplink subframe information and the physical resource allocation information source in the uplink subframe.

Resource Block, PRB) or subcarrier basic unit. That is, one physical resource may contain one or more physical resource blocks, or one physical resource may consist of a fixed number of subcarriers. In the present invention, the physical resource is a basic unit of MBMS feedback. The one physical resource is a resource unit that can be used for MBMS uplink feedback. The network side allocates an uplink subframe for uplink feedback and a physical resource configured in the uplink subframe for the multimedia broadcast multicast service; and stipulates, or implicitly, the uplink subframe indication information and/or the physical resource information in the uplink subframe. Or notify the user equipment by signaling. The method further includes: the network side sending a feedback statistics message to the user equipment, where the feedback statistics message carries MBMS information used to notify the user equipment that the feedback count needs to be performed; and the uplink of the user equipment allocated by the network side The feedback information of the MBMS service required by the network side is transmitted in the physical resources configured in the subframe and the uplink subframe. The method for uplink resource allocation and feedback of the present invention can be well applied to statistics

The uplink feedback resource allocation of the MBMS indicates which uplink physical resources are used for uplink transmission of the UE for the statistical information of the MBMS. The technical solution for implementing MBMS uplink resource allocation and feedback according to the present invention will be further described in detail below with reference to specific embodiments. Embodiment 1 Only one uplink subframe is allocated for multiple MBMSs. The network side allocates uplink physical resources in only one uplink subframe for multiple MBMSs. The downlink subframe in which the network side sends the statistics message is recorded as N. (If the statistical message data volume is large, and multiple downlink subframes are used to send statistics messages, then the last downlink subframe is denoted as N), which is indicated by the parameter K. Uplink feedback subframe of MBMS. In this embodiment, if multiple MBMSs need to be counted at the same time, the network side allocates the same uplink subframe for multiple MBMSs for the uplink feedback of each MBMS, that is, multiple MBMSs are in the physical resource of the one, and the UE that needs feedback Feedback is made on the physical resources of the corresponding MBMS. When the network side sends a statistics message for a certain MBMS to the user equipment, the downlink subframe to which the statistics message is sent is recorded as N, then the uplink feedback subframe of the MBMS is N+K, as shown in FIG. In an integer, K is an integer greater than or equal to 4. Specifically, the value of K is configured by the network side as needed, and the parameter K is sent to the UE after configuration. At this point, the network side directly pointed out The uplink subframe position allocated for multiple MBMSs, that is, the uplink feedback subframe is the N+Kth subframe. Further, if the network side does not need to consider the flexibility of the uplink feedback subframe, the uplink feedback subframe parameter K in this embodiment may be agreed by the network side and the UE in advance, that is, the value of K is standardized. The K value can be omitted and sent to the UE. For example, the corresponding uplink feedback subframe parameter K of the network side and the terminal UE is directly specified in the communication standard protocol. In this case, the network side is not required to notify the UE by signaling. It is. After the uplink feedback subframe is allocated to the MBMS, the physical resources in the uplink subframe are used for the UE to feed back the MBMS, and the physical resource allocation in the uplink feedback subframe is also required. In this embodiment, the physical downlink control channel (Physical Downlink Control)

Channel, PDCCH) notifies the UE of the uplink grant signaling (Uplink grant) of the uplink subframe. The uplink grant signaling is used to describe which physical resources in the uplink subframe are the uplink feedback for the MBMS to be counted, and the physical resource information used for the uplink feedback is used as the uplink grant information. The uplink authorization information in the uplink authorization signaling may also be sent in a statistical message, or may be determined in a predetermined manner to determine which physical resources in the subframe are used for feedback of the MBMS. For example, a plurality of physical resources may be agreed in the uplink subframe as a physical resource for the MBMS to perform feedback, that is, after the uplink subframe that is fed back is determined by the foregoing manner, the UE does not need to be notified by signaling to the subframe. Those physical resources are used for MBMS uplink feedback, UE and network

The manner of allocating physical resources in the sub-frame may be used to allocate the same physical resource to multiple MBMSs. In this case, the uplink feedback sequence may be used to distinguish UE feedback for different MBMSs. A mode for allocating a corresponding physical resource for each MBMS. In this manner, after the UE feeds back, the network side distinguishes the feedback of the UE for different MBMSs according to the feedback physical resource location. If the uplink authorization information is not agreed in advance, the information may be sent by using the following two methods: First, the uplink authorization information (referred to as uplink authorization information, which is actually indicating the allocated uplink subframe) Which physical resources are used for MBMS feedback) are carried in statistical messages The uplink grant information can be simplified. Only the physical resources (blocks) in the uplink subframe are used for the uplink feedback of the MBMS service. Here, the uplink authorization information in the LTE protocol may be different, and the resource allocation information in the existing uplink authorization information may be used as the uplink authorization information in the embodiment, or the uplink authorization information in the LTE protocol may be directly used. Some information unrelated to MBMS feedback can be used as invalid information. In the downlink subframe after the downlink subframe in which the network side sends the statistics message, the UE detects the radio network Temporary Identifier (RNTI) identifier in the PDCCH (the specific identification process and 5.3.3.2 of the 36.212 protocol describes the same) uplink grant information for MBMS feedback. Therefore, it is learned which physical resources in the specified uplink subframe are used for MBMS uplink feedback. In general, the UE receives and parses data in one subframe, and requires about 3 to 4 subframes. That is, the sending subframe of the statistic message is N, and then the PDCCH in the downlink subframe that is greater than or equal to N+4 is used to retrieve the uplink grant information used for the MBMS feedback by the pre-agreed RNTI identifier, and the UE retrieves the RNTI identifier. The subframe of the uplink grant information is denoted as M, and then the UE transmits the feedback information of the MBMS in an uplink subframe greater than or equal to M+4. In summary, the subframe information indicating the uplink feedback and/or the physical resource information for feedback in the uplink subframe in the present invention may be agreed in advance, and then the signaling overhead is omitted.

Embodiment 2 A method for allocating a plurality of consecutive uplink subframes for a plurality of MBMSs The network side allocates a plurality of consecutive uplink subframes for a plurality of MBMSs, and allocates physical resources in the consecutive plurality of uplink subframes. The downlink subframe in which the network side sends the statistics message is recorded as N. (If the statistical message data volume is large, and multiple downlink subframes are used to send statistics messages, then the last downlink subframe is denoted as N), which is indicated by the parameter K. The starting subframe of the uplink feedback subframe of the MBMS. As shown in FIG. 2, the parameter K in the embodiment 2 is described as the starting subframe position of the uplink subframe allocated by the MBMS service, that is, consecutive subframes starting from the N+K subframes are used for uplink feedback. frame. In this embodiment, if the consecutive multiple uplink subframes are regarded as one overall uplink subframe, it may be regarded as a special case of Embodiment 1. The specific number N _{c of} consecutive consecutive uplink subframes may be previously agreed to a fixed value, for example, fixed to three uplink subframes, so that the specific consecutive number N _c is not configured, and no signaling is required. send to the UE; if N _c is not previously agreed fixed value, the specific needs of the number of consecutive N _c as a parameter is also sent to the UE. If the consecutive subframe number parameter is not sent, it may be implied that only one uplink subframe is allocated or a fixed number of consecutive uplink subframes are allocated by default. For the method of allocating a plurality of consecutive uplink subframes, it may be further agreed that the physical resources allocated for the same uplink for the same MBMS in each uplink subframe are the same, or are allocated for uplink in each uplink subframe. The physical resources of the feedback are the same. This only requires the network side to configure and send an uplink grant information to describe the physical resource information for the MBMS feedback in the multiple uplink subframes. Of course, the physical resource information in the subframe may also be independently configured for each uplink subframe. For the specific manner of how to allocate the uplink feedback physical resource by using the uplink authorization information in the subframe, refer to the allocation mode in Embodiment 1, and details are not described herein again. In the multiple consecutive uplink subframes, each uplink subframe is used for feedback of one MBMS, and one or more physical resources for uplink feedback are allocated to its corresponding MBMS in each uplink subframe.

As a special case of the embodiment, an uplink subframe may be allocated to each MBMS that needs to be counted for the UE to send uplink feedback information, and may be applied to the network side to allocate uplink subframes for multiple MBMSs at a time. If the network side needs to allocate uplink subframes for the three MBMSs for the UE to send uplink feedback information, and each MBMS allocates only one uplink subframe, the multiple consecutive allocation manners described above are used. In the case of continuous uplink subframe allocation, the parameter K and the number of consecutive uplink subframes N _{c are} used for allocation. In this case, the parameter K can be agreed in advance, for example, the agreement is 4, and the number of consecutive uplink subframes N _c can also be implied. That is equal to the number of MBMSs that need to be statistically fed back in the statistics messages sent by the network side. This saves overhead. Of course, these two parameters can also be used or one of them can be configured by signaling. In this special case, each successive uplink subframe corresponds to uplink feedback for one MBMS.

Embodiment 3 A method for allocating multiple discrete uplink subframes for multiple MBMSs It is assumed that the network side allocates multiple discrete uplink subframes for multiple MBMSs for uplink feedback of MBMS. In the third embodiment, the discrete manner of the discrete uplink subframes is described as a pattern, which may be agreed in advance. For example, in the discrete pattern shown in FIG. 3, three discrete uplink subframes are allocated, and three uplink subframe intervals are one. (In this embodiment, the number of subframe intervals between the allocated uplink subframes is used as an uplink subframe. Frame interval parameter) Uplink subframes. At this time, the parameter K describes the position of the first uplink subframe in the three discrete uplink subframes, or K describes the first uplink subframe of the pattern, and the remaining uplink subframes follow the agreed pattern ( Or it can be said that it is an agreed interval) to launch in order. For example, in determining the starting position of the first uplink subframe as the N+K uplink subframes, the position of the second uplink subframe may be obtained by adding the row subframe interval again, and so on. If the number of subframe intervals between the allocated uplink subframes is the same, the accumulated value added needs to be added to determine the next allocated uplink subframe number; if the allocated uplink subframes are two When the difference between the numbers is used, the number of the next allocated uplink subframe can be obtained by directly accumulating the previous allocated uplink subframe number and the number difference. When the assigned next subframe number is obtained, the position of the assigned next subframe is determined. The resource allocation mode requires parameters K (initial subframe start position), uplink subframe number N _d , and uplink subframe interval three parameters to determine all uplink subframes used for the MBMS. Of course, these parameters may also be used. In advance, at least one of the above three parameters is included.

The physical resources of the uplink feedback for the MBMS in the uplink subframe may be the same, or the physical resources in the subframe may be independently configured for each uplink subframe. In the multiple consecutive uplink subframes, each uplink subframe is used for feedback of one MBMS, and one or more physical resources for uplink feedback are allocated to its corresponding MBMS in each uplink subframe. As a special case of the embodiment, an uplink subframe may be allocated to each MBMS that needs to be counted for the UE to send uplink feedback information, and may be applied to the network side to allocate uplink subframes for multiple MBMSs at a time. For example, if the network side needs to allocate uplink subframes for 3 MBMSs for the UE to send uplink feedback information, and each MBMS allocates only one uplink subframe, A plurality of discrete allocation methods as described. When the discrete uplink subframe is allocated, the parameter K, the uplink subframe interval N _{l the} number of uplink subframes N _d , and three parameters are used for allocation. In this case, the parameter K can be agreed in advance, for example, the agreement is 4, the uplink subframe. The number N _d may also be implied, that is, equal to the number of MBMSs that need to be statistically fed back in the statistics message sent by the network side, and the uplink subframe interval may also be agreed, for example, the agreement is 4, which can save overhead. Of course, these three parameters can also be configured in whole or in part by signaling. Then, according to the order in which the three MBMSs appear in the statistical message, or in the order of the size of the three MBMSIDs, the three MBMSs respectively correspond to the first, second, and third uplink subframes for respective feedback. The physical resource allocation in the uplink subframe may be performed by using the physical resource allocation manner in Embodiment 1. In this special case, each discrete uplink subframe corresponds to uplink feedback for one MBMS.

Embodiment 4 Mode for Assigning One Uplink Subframe to Each MBMS This embodiment describes a case where different uplink feedback resources are allocated to MBMSs that need feedback statistics for the network side. In this embodiment, the downlink subframe in which the downlink information message is sent by the network side is recorded as N (if there are multiple downlink subframes used to send the statistics message, the last downlink subframe is recorded as N), and is indicated by the parameter K. The uplink feedback subframe position of each MBMS or the start position of the uplink feedback subframe. Assume that the network side needs to send feedback for two MBMSs in the statistics message and allocate only one uplink subframe for each MBMS, then the network side configures the value of each K for each service (K of two services) The value can be configured the same). Each MBMS has its own uplink subframe information for uplink feedback. See Figure 1 for the range and meaning of K.

For example, the K values assigned to the two services are 4 and 8, and each service is assigned only one uplink subframe. The physical resource resource allocation within the subframe is shown in Embodiment 1. When the values of K of the two services are the same, then it is further possible to allocate different physical resources in the subframe.

Embodiment 5 A method for allocating multiple uplink subframes for one MBMS, using user grouping Feedback

This embodiment describes a method for allocating a plurality of different uplink feedback subframes or physical resources and a UE packet for uplink feedback for one MBMS. The network side allocates multiple uplink subframes for the MBMS that needs to perform uplink feedback statistics. There is only one uplink feedback resource for the MBMS in each subframe, or multiple different physical resources in one uplink subframe for uplink feedback. It is assumed that four different uplink subframes are allocated to the MBMS, and the physical resources used for uplink feedback in each subframe may be the same, or may be different. If the same, the signaling overhead may be reduced. If different, the system resource allocation may be improved. Flexibility. Here, the method of allocating a plurality of uplink subframes in the foregoing Embodiment 3 may be used, but only one MBMS is used at this time, that is, one frame includes four subframe patterns, and four uplink subframes may be continuous or discrete, K Used to indicate the first uplink subframe of the pattern. As shown in Figure 4, the K value is 4, and the uplink subframe interval (in this embodiment, the number difference between the allocated subframes is used as the uplink subframe interval parameter) is 4, and a total of 4 uplink subframes. After the UE receives the statistic message, the UE that needs to perform the feedback calculates the hop according to the stipulated rule, and the number of the group is the same as the allocated uplink physical resource, and each group of UEs performs uplink feedback on the corresponding one uplink physical resource. In this embodiment, it is divided into 4 groups because there are 4 different uplink physical resources. The UE of each group sends uplink feedback information for the MBMS on an uplink subframe physical resource corresponding to the foregoing group. The physics used for uplink feedback in the subframe here

There are many rules for the grouping of the UE. Here is a simple way to modulate the number of packets Ng by using the value corresponding to the UE ID, that is, UE_ID mod Ng = offset, where UE_ID indicates the decimal corresponding to the UE ID. Value, Ng indicates the number of groups to be required, and offset indicates the modulus value. In this embodiment, Ng=4, after calculation, four types of UEs with modulo values of 0, 1, 2, and 3 can be obtained, and corresponding uplink feedback resources are 1, 2, 3, and 4 uplinks respectively. Physical resources within a sub-frame. Here, after receiving the statistics message, if the UE is receiving the MBMS, the UE is a UE that needs to perform feedback, and the UE must first calculate its own group information according to its own UE ID, and then determine where it is based on the group information. Uplink feedback is performed in the uplink physical resource of one subframe. In this way, the feedback statistics for the MBMS are sent by the UEs that need to be fed back, and each group sends uplink feedback information, so that the network side is on the four allocations. The UE can detect that there is UE feedback information (either by detecting information energy on the uplink resource, or by receiving data for decoding processing, etc.), and then the network side can know that at least four UEs are receiving the MBMS. If only UE feedback is detected on three of the uplink resources, the network side may also know that at least three UEs are receiving the MBMS. Thus, as the number of packets increases, the network side can approximately know the number of UEs that receive the MBMS.

Embodiment 6 An MBMS allocates an uplink subframe, and the physical resources in the subframe are fed back by the user grouping mode. It is assumed that the network side allocates only one uplink subframe for one MBMS, if there are multiple different physical resources in the subframe for uplink feedback. For example, reference may be made to the manner of Embodiment 5, that is, different physical resources in one uplink subframe may be corresponding to multiple uplink subframes. Specifically, the user may be grouped, and the user equipment in each group uses the physical resources corresponding to the packet in the subframe to perform uplink feedback. In the foregoing embodiments 1 to 6, the user packet feedback manners of the embodiments 5 and 6 can be applied to the uplink subframe and the physical resource allocation manner in the embodiments. Embodiment 5 and Embodiment 6 provide a preferred scheme for UE packet feedback. The basic idea of packet feedback is to group according to the number of physical resources that can perform uplink feedback, and then each group of UEs uses one uplink feedback physical resource. Uplink feedback.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be performed 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 foregoing embodiment may be implemented in the form of hardware, or may be implemented in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software. The above is only the embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Where is the spirit and principle of the present invention Any modifications, equivalent substitutions, improvements, etc., are intended to be included within the scope of the appended claims.

Industrial Applicability The present invention can provide flexible MBMS uplink physical resource allocation, and the signaling overhead is very small by prior agreement or implied. The method of the UE packet feedback is also used in combination with the uplink feedback resource allocation mode, and the UE side can learn about the UE that is receiving the statistical MBMS by using the user packet feedback mode of the physical resource in the uplink subframe or the subframe. Order of magnitude information.

Claims

Claim

A method for uplink resource allocation and feedback of a multimedia broadcast multicast service (MBMS), the method includes: the network side allocates an uplink subframe for uplink feedback and a physical resource configured in an uplink subframe for the MBMS, and uplinks The subframe indication information and/or the physical resource information in the uplink subframe are notified to the user equipment in an agreed, or implicit, or signaling manner.

The method of claim 1, the method further includes: the network side sending a feedback statistics message to the user equipment, where the feedback statistics message carries MBMS information used to notify the user equipment that the feedback count needs to be performed; and the user The device sends the feedback information of the MBMS required by the network side in the uplink subframe allocated by the network side and the physical resources configured in the uplink subframe.

The method according to claim 1 or 2, wherein the uplink subframe indication information comprises: uplink subframe position information or uplink subframe start position information, uplink subframe number information, and uplink subframe interval One of the information or a combination thereof; where: the uplink subframe position information is used to describe the number of subframe intervals of the allocated uplink subframe and the downlink subframe in which the statistical message is sent, or to describe the allocated uplink subframe The number of subframe intervals of the frame and the last downlink subframe of the plurality of downlink subframes that send the statistics message; the uplink subframe start location information, used to describe the first uplink subframe of the allocated multiple uplink subframes The number of the subframe interval of the downlink subframe in which the statistics message is sent, or is used to describe the first uplink subframe of the allocated multiple uplink subframes and the subframe of the last downlink subframe of the multiple downlink subframes that send the statistics message. The number of frame intervals; the number of uplink subframes, which is used to describe the number of subframes of the allocated uplink subframes; and the uplink subframe interval, which is used to describe the subframe interval between the allocated uplink subframes. Subframe information amount or number difference.

The method according to claim 1 or 2, wherein, in the step of allocating an uplink subframe for uplink feedback and a physical resource configured in an uplink subframe, the network side allocates multiple MBMSs in the network side. When the uplink resource is uplinked, the uplink subframe is allocated to the multiple MBMSs, and the same or different physical resources are allocated to the multiple MBMSs in the uplink subframe, where the uplink subframe indication information includes uplink subframe location information.

The method according to claim 1 or 2, wherein the network side allocates uplinks for multiple MBMSs in the step of allocating the uplink subframes for uplink feedback and the physical resources configured in the uplink subframes for the MBMS. When the resources are fed back, multiple uplink subframes are allocated to the multiple MBMSs, where the multiple uplink subframes are consecutive or discrete uplink subframes; in the multiple consecutive or discrete uplink subframes, Multiple in each uplink subframe

The MBMS allocates the same or different physical resources, or in the plurality of consecutive or discrete uplink subframes, each uplink subframe is used for uplink feedback of one MBMS, and corresponds to each uplink subframe. The MBMS allocates one or more physical resources for uplink feedback; when the multiple uplink subframes are consecutive uplink subframes, the uplink subframe indication information includes uplink subframe start position information and uplink subframes. When the plurality of uplink subframes are discrete uplink subframes, the uplink subframe indication information includes an uplink subframe start position, an uplink subframe number, and an uplink subframe interval.

The method of claim 5, wherein, when the network side allocates one uplink subframe for each MBMS, the network side informs the user equipment of the number of uplink subframes allocated in a predetermined manner, and omits the The uplink subframe indicates the transmission of the number of uplink subframes; or

The network side notifies the number of uplink subframes allocated by the user equipment in an implicit manner, and the number of uplink subframes is equal to the number of the plurality of MBMSs, and the number of uplink subframes in the uplink subframe indication information is omitted. .

7. The method according to claim 1 or 2, wherein the network side allocates MBMS for use When the network side allocates uplink feedback resources for multiple MBMSs in the step of the uplink subframes and the physical resources configured in the uplink subframes, an uplink subframe for uplink feedback is allocated to each MBMS, where the network The side allocates a physical resource for each MBMS in its corresponding uplink subframe; the uplink subframe indication information includes an uplink subframe start position corresponding to each MBMS.

The method of claim 2, wherein the network side allocates uplink feedback for multiple MBMSs in the uplink subframe for uplink feedback and the physical resources configured in the uplink subframe for the MBMS. When the resource is allocated, each MBMS is allocated a plurality of uplink subframes for uplink feedback, where the multiple uplink subframes are consecutive or discrete uplink subframes, and the MBMS is allocated the same in each of the uplink subframes. Or the different physical resources; the step of the user equipment transmitting the feedback information of the MBMS required by the network side in the uplink resource allocated by the network side and the physical resource configured in the uplink subframe, where the user equipment receives After the statistical feedback message is received, the uplink subframe corresponding to the packet to which the user belongs is calculated according to the agreed grouping rule, and the physical resources in the uplink subframe and the subframe corresponding to the packet are subjected to MBMS feedback to the network side;

When the multiple uplink subframes are consecutive uplink subframes, the uplink subframe indication information includes an uplink subframe start position, an uplink subframe number, and a number of user equipment packets; the multiple uplink subframes. When the uplink subframe is a discrete uplink subframe, the uplink subframe indication information includes an uplink subframe start position, an uplink subframe number, an uplink subframe interval, and a number of user equipment groups.

The method of claim 2, wherein, in the step of the network side allocating the uplink subframe for the uplink feedback and the physical resource configured in the uplink subframe, the network side allocates uplink feedback for multiple MBMSs. In the case of a resource, only one uplink subframe for uplink feedback is allocated to multiple MBMSs, and different physical resources are allocated to the MBMS in the uplink subframes; The uplink subframe indication information includes an uplink subframe start position and a number of user equipment groups; the user equipment sends the network side in the uplink subframe and the physical resources configured in the uplink subframe allocated by the network side. The step of requesting the feedback information of the MBMS includes: after receiving the statistical feedback message, the user equipment calculates, according to the agreed grouping rule, a physical resource in the subframe corresponding to the packet to which the user belongs, corresponding to the packet The physical resource performs MBMS feedback to the network side.

The method according to claim 1 or 2, wherein the network side notifies the user equipment of the allocated uplink subframe indication information and/or the uplink subframe physical resource information by using a signaling indication manner: And using the statistical feedback message to carry the uplink subframe indication information and/or the physical resource information in the uplink subframe; or: using the statistical feedback message to carry the uplink subframe indication information, and using the wireless network after the statistics message is sent The Temporary Identifier (RNTI) identifies the physical resource information in the uplink subframe in the subsequent downlink subframe; or uses the statistical feedback message to carry the uplink subframe indication information, and uses the authorization information signaling to deliver the uplink subframe. Physical resource information.

The method according to claim 1 or 2, wherein the physical resource is composed of a physical resource block as a basic unit; wherein each physical resource is a resource unit for MBMS uplink feedback; the one physical resource It consists of one or more physical resource blocks or a fixed number of subcarriers.

12. A system for uplink resource allocation and feedback of a multimedia broadcast multicast service (MBMS), where the system includes a network side device and a user equipment, where the network side device is configured to allocate an uplink subframe for uplink feedback to the MBMS and The physical resources configured in the uplink subframe, and the uplink subframe indication information and/or the physical resource information in the uplink subframe are The user equipment is notified by agreement, or implicitly, or by signaling.

The system of claim 12, wherein the network side device is further configured to: send a feedback statistics message to the user equipment, where the feedback statistics message carries MBMS information used to notify the user equipment that the feedback count needs to be performed; The user equipment is set to: obtain an uplink subframe for uplink feedback allocated by the network side device and a physical resource configured in the uplink subframe, and the uplink subframe and the uplink subframe allocated by the network side The feedback information of the MBMS required by the network side is sent in the physical resources configured in the frame.

The system according to claim 12 or 13, wherein the uplink subframe indication information comprises: uplink subframe position information or uplink subframe start position information, uplink subframe number information, and uplink subframe interval information. One of them or a combination thereof; where:

The uplink subframe position information is used to describe the number of subframe intervals of the allocated uplink subframe and the downlink subframe in which the statistics message is sent, or to describe the allocated uplink subframe and multiple downlink subframes for sending the statistics message. The number of subframe intervals of the last downlink subframe; the uplink subframe start location information, used to describe the number of subframe intervals of the first uplink subframe in the allocated multiple uplink subframes and the downlink subframe in which the statistics message is sent Or for describing the number of subframe intervals of the first one of the plurality of uplink subframes and the last one of the plurality of downlink subframes that send the statistics message; the number of uplink subframes, The number of subframes describing the allocated uplink subframes; the uplink subframe interval, which is used to describe the number of subframe intervals or the subframe number difference between the allocated uplink subframes.

The system of claim 13, wherein, when the network side device allocates uplink feedback resources for multiple MBMSs, each of the MBMSs allocates multiple uplink subframes for uplink feedback, and the multiple uplink sub-frames. The frame is continuous or discrete a row subframe, in which the same or different physical resources are allocated to the MBMS in each of the uplink subframes; after receiving the statistical feedback message, the user equipment calculates, according to the agreed grouping rule, a packet corresponding to the packet to which the user belongs. In the uplink subframe, the physical resources in the uplink subframe and the subframe corresponding to the packet are subjected to MBMS feedback to the network side;

When the multiple uplink subframes are consecutive uplink subframes, the uplink subframe indication information includes an uplink subframe start position, an uplink subframe number, and a user equipment group number; the multiple uplink subframes. When the frame is a discrete uplink subframe, the uplink subframe indication information includes an uplink subframe start position, an uplink subframe number, an uplink subframe interval, and a number of user equipment groups.

The system of claim 13, wherein, when the network side device allocates uplink feedback resources for multiple MBMSs, only one uplink subframe for uplink feedback is allocated to multiple MBMSs, in the uplink subframe. Allocating different physical resources for the MBMS; the uplink subframe indication information includes an uplink subframe start position, and a number of user equipment groups; after receiving the statistical feedback message, the user equipment calculates according to the agreed grouping rule The physical resources in the subframe corresponding to the packet to which the user belongs belong to the MBMS feedback to the network side in the physical resource corresponding to the packet.

The system according to claim 12 or 13, wherein the network side device notifies the user equipment of the allocated uplink subframe indication information and the physical resource information in the uplink subframe by using a signaling indication manner: The statistical feedback message carries the uplink subframe indication information and the physical resource information in the uplink subframe. Alternatively, the statistic feedback message carries the uplink subframe indication information, and the temporary identifier of the wireless network used after the statistic message is sent (RNTI) Identifying the physical resource information in the uplink subframe in the subsequent downlink subframe; or The statistic feedback message carries the uplink subframe indication information, and uses the authorization information signaling to deliver the physical resource information in the uplink subframe.

The system according to claim 12 or 13, wherein the network side device allocates a plurality of uplink subframes, the multiple uplinks to the multiple MBMSs when allocating uplink feedback resources for multiple MBMSs The subframe is a continuous or discrete uplink subframe; in the plurality of consecutive or discrete uplink subframes, multiple MBMS services are allocated the same or different physical resources in each uplink subframe, or Each of the plurality of consecutive or discrete uplink subframes is used for uplink feedback of one MBMS, and one or more uplink feedbacks are allocated to the corresponding MBMS in each uplink subframe. When the plurality of uplink subframes are consecutive uplink subframes, the uplink subframe indication information includes uplink subframe start location information, and uplink subframe number information;

When the multiple uplink subframes are discrete uplink subframes, the uplink subframe indication information includes an uplink subframe start position, an uplink subframe number, and an uplink subframe interval.

The system according to claim 18, wherein, when the network side device allocates one uplink subframe for each MBMS, the network side device notifies the user equipment of the number of uplink subframes allocated in a predetermined manner, and omits The uplink subframe indicates the number of uplink subframes in the information transmission; or the network side device notifies the number of uplink subframes allocated by the user equipment in an implicit manner, and the number of the default uplink subframes is equal to the multiple MBMSs. The number of uplink subframes in the uplink subframe indication information is omitted.

The system according to claim 12 or 13, wherein the network side device comprises: a multi-cell coordination entity (MCE), a base station (eNB), a relay station, a broadcast multicast service center, an MBMS gateway, or A variety.