WO2009009986A1

WO2009009986A1 - Method of multicast/broadcast service load statistic and related device

Info

Publication number: WO2009009986A1
Application number: PCT/CN2008/071509
Authority: WO
Inventors: Hongliang Xu; Juejun Liu; Junxian Mo
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2007-07-19
Filing date: 2008-07-01
Publication date: 2009-01-22
Also published as: CN101350946A

Abstract

A method of multicast/broadcast service load statistic, a base station device and a mobile terminal are provided. The method includes that the base station BS assigning an uplink feedback resource to the mobile terminal MS in idled for the determined MBS; the BS detecting the message used to identify that the MBS service is received from the uplink feedback resource, and counting the amount of the received messages.

Description

Multicast/broadcast service load statistics method and related equipment

This application claims the priority of the Chinese Patent Application filed on July 19, 2007, the Chinese Patent Office, Application No. 200710130437.7, entitled "A Method for Multicast/Broadcast Service Load Statistics and Related Equipment", the entire contents of which. This is incorporated herein by reference.

Technical field

The present invention relates to mobile communication technologies, and more particularly to a multicast/broadcast service load statistics method and related equipment.

BACKGROUND OF THE INVENTION Unicast is data transmission to a specific host. The data link layer has a very specific destination address in the data header, and the destination address points to a single receiving interface. In this manner, communication between any two hosts is performed. Will not interfere with other hosts in the network. However, sometimes a host sends frames to all other hosts on the network, which is broadcast. Multicast is between unicast and broadcast, and frames are only transmitted to multiple hosts belonging to a multicast group.

Multicast Broadcast Service (MBS) is a data transmission service from a single point to multiple points on the downlink. Since the MBS service implements point-to-multipoint data transmission on the downlink, the BS uses a lower coding rate relative to unicast in order to ensure the reliability of data received by all mobile terminals (Mobile Stations: MSs) in the cell. However, when the reduction of the load in the cell enables the BS to perform data transmission for each MS in a unicast manner, a unicast method with a higher coding rate is generated to provide a higher quality of service data transmission for each MS. Demand. Therefore, the prior art has proposed the need for MBS to transfer to unicast, and has proposed a Single Frequency Network (SFN) technology.

The SFN refers to a technology in which a plurality of BSs simultaneously transmit the same MBS data on the same subcarrier, which is used to improve the performance of the MBS. Therefore, correspondingly, there will be a case where the SFN is transferred to the non-SFN and the non-SFN is transferred to the SFN, and one of the factors generated by the situation is determined by the cell load, and the MSB or SFN technology is selected according to the load condition in the cell. Provide flexible and efficient services for each MS. In summary, there is a need in the prior art to provide a method for performing statistics on the current load of the MBS.

In the prior art, the mobile terminal in the MBS includes an active mode and is idle. Idle mode and sleep mode. The BS can be aware of whether the MS in the active state and the sleep state is enjoying the service of the MBS. Therefore, the BS can perform statistics on the MBS load of the MS in the active state and the sleep state.

In addition, for a mobile terminal in an idle state, the prior art requires that the mobile terminal in this state supports receiving MBS data. The following is a brief introduction to the manner in which the idle mobile terminal accepts MBS data.

At the Institute of Electrical and Electronic

Engineers: IEEE) Two types of access MBS are defined in 802.16e: Single Base Station (BS) access and multiple BS access.

The multiple BS access means that multiple BSs simultaneously send the same MBS data on the same time domain and frequency domain resources. In the type of multiple BS access, the BS that sends the same MBS data with the same Connection Identifier (CID) and the same Security Association (SA) constitutes a set of BSs. This set is called MBS. Area (MBS Zone). Each MBS Zone is identified by an MBS Zone Identifier (MBS Zone ID).

In the prior art, the method for the mobile terminal to receive the MBS data in the MBS Zone is specifically: the MS obtains the MBS Zone ID when communicating with the BS, and if the MS that obtains the MBS Zone ID enters the Idle mode, the MS can continue to broadcast the same MBS Zone. The BS receives the same MBS data, and the MS can continue to receive the MBS data using the CID and SA obtained at the time of registration. If the MS in Idle mode moves to another MBS Zone, the MS needs to register at the BS in the new MBS Zone, thus obtaining a new CID and SA to continue receiving MBS data.

The inventor has found that in the prior art, the BS does not manage the MS in the idle state in the cell, and the MS in the idle state can receive the MBS service data by using the CID and the SA obtained during registration. . Therefore, in this case, although the MS in the idle state becomes the load of the MBS service in the cell, the BS cannot know the situation that the MS in the idle state enjoys the MBS service, and thus the MBS load statistics in the cell cannot be completed.

Summary of the invention

A technical problem to be solved by an embodiment of the present invention is to provide a multicast/broadcast service load statistics. The method can perform load statistics on a mobile terminal in an idle state.

To solve the above technical problem, the embodiment provided by the present invention is implemented by the following technical solutions: For a determined MBS, the base station BS assigns an uplink feedback resource to the mobile terminal MS in an idle state; the BS detects the uplink feedback resource. The information fed back by the MS is used to identify the information of the MBS service, and the number of received messages is counted.

Correspondingly, a further embodiment of the present invention is to provide a base station device, including: an uplink resource assignment unit, configured to specify an uplink feedback resource, and an information encapsulating unit, configured to add information of the uplink feedback resource to a pre- The sending unit is configured to send, to the MS in the idle state, a protocol data packet PDU that includes the uplink feedback resource information.

A further embodiment of the present invention provides a mobile terminal, including: a receiving unit, configured to acquire a protocol data packet PDU sent by a base station; a parsing unit, acquiring information of an uplink feedback resource included in the PDU; a feedback unit, occupying The uplink feedback resource performs load feedback; and the sending unit sends the load feedback information.

As shown in the foregoing embodiment, the BS performs load statistics feedback for the MS to indicate the uplink resource, so that the MS in the idle state can perform load feedback to the BS, so that the BS can count the idle state of the MS to enjoy a certain MBS service. The statistics of MBS load can be realized.

DRAWINGS

Figure 1 is a flow chart of a first embodiment of the present invention;

2 is a schematic diagram of a MBS load statistics feedback resource block according to an embodiment of the present invention;

3 is a schematic diagram of subcarrier mapping of a MBS load statistical feedback channel in PUSC according to an embodiment of the present invention;

4 is a schematic diagram of subcarrier mapping of a MBS load statistical feedback channel when PUSC is optional according to an embodiment of the present invention;

5 is a schematic diagram of an OFDM symbol of MBS load statistical feedback information according to an embodiment of the present invention; FIG. 6 is a flowchart of a second embodiment of the present invention;

Figure 7 is a flow chart of a third embodiment of the present invention;

8 is a schematic structural diagram of a MAC header supporting an MBS feedback indication according to an embodiment of the present invention; FIG. 9 is a flowchart of a fourth embodiment of the present invention;

10 is a schematic structural diagram of a first embodiment of a base station device according to the present invention; 11 is a schematic structural diagram of a second embodiment of a base station device according to the present invention;

12 is a schematic structural diagram of a first embodiment of a mobile terminal according to the present invention;

FIG. 13 is a schematic structural diagram of a second embodiment of a mobile terminal according to the present invention.

detailed description

The embodiments of the present invention are directed to implementing MBS load statistics. To achieve the object, embodiments of the present invention are specifically described below.

To illustrate the first embodiment of the present invention, the concepts of uplink assignment and downlink assignment, and how to indicate the MBS data to be transmitted next are first introduced.

The downlink assignment refers to indicating an attribute of the downlink data or the management message on the downlink, where the attribute includes: a location where the downlink data or the burst where the management message is located is located on the downlink, The size of the downlink data or management message, the modulation coding method used, and the like. Accordingly, the MS can demodulate and decode in a suitable manner according to this indication to the corresponding location.

The uplink assignment refers to the location and size that the BS can notify the MS uplink data and the burst where the management message is located on the uplink, and the modulation and coding mode that the burst needs to use. Accordingly, the MS sends an uplink burst according to the indication in the corresponding position of the uplink in a suitable modulation and coding manner, so that the BS can demodulate and decode the uplink data or the management message in a corresponding manner in a corresponding manner. .

In the downlink assignment of IEEE 802.16e, there are several downlink assignment cells DL-MAP-IE(), and the data block on the resource block assigned by DL-MAP_IE() is called a downlink burst.

DL-MAP—The downlink burst specified by IE() is encoded and modulated by the modulation and coding scheme specified in DL-MAP-IE(); a downlink burst may have multiple MS data, or may be multicast broadcast data. In the uplink assignment of IEEE 802.16e, there are several UL-MAP-IE(), one UL-MAP- IE() data block on the resource block is called an uplink burst. UL-MAP - The uplink burst specified by IE() is encoded and modulated by the modulation and coding scheme specified in UL-MAP-IE().

Referring to Fig. 1, a first embodiment of the MBS load statistics of the present invention will be specifically described.

In this embodiment, when load statistics are required, the BS first indicates that the MS in the Idle mode parses the uplink assignment and the information of the frame in which the uplink assignment is located, and then the BS specifies one or more blocks for load statistics in the uplink assignment. Upstream feedback resource, the specified method is that the BS indicates the frame offset, location, and size of the uplink feedback resource in the uplink assigned cell; when the MS resolves to have its own MBS service pair After the assignment of the uplink feedback resource, the MS selects a resource on the specified resource to send feedback information; the BS uses the number of feedback information received as the Idle mode MS load to enjoy the MBS service.

Step 11: When the BS needs to perform load statistics, it first indicates that the MS of the Idle mode resolves the uplink assignment and the information of the frame where the uplink assignment is located.

The method for indicating the MS parsing uplink assignment (UL-MAP) of the Idle mode and the information of the uplink assignment frame includes: Method 1), transmitting the assignment by using a management message, specifically, a letter assigned in the MBS data The element carries the indication bit and the frame information of the uplink assignment; and the method 2) carries the indication bit in the Medium Access Control (MAC) header of the Protocol Data Unit (PDU) of the MBS and The frame information of the uplink assignment. The method of carrying the indication bit and the frame information of the uplink assignment is specifically described below.

Method 1): Add an indicator bit to the cell to which the MBS data is assigned to indicate that the MS needs to resolve the uplink assignment and the frame information of the uplink assignment.

Three types of MBS data assignment cells are defined in the prior art. Table 1, Table 2 and Table 3 respectively show the method of adding the indication bits and the frame information of the uplink assignment.

Table 1: After adding the indicator bit to indicate MS Resolution Uplink Assignment (UL-MAP)

111 : 12 decibels;

No. OFDMA Symbols 7 Number of orthogonal frequency division multiplexing symbols occupied by multicast broadcast service assignment messages

No. Subchannels 6 Number of subchannels occupied by multicast broadcast service assignment messages

Repetition Coding Indication 2 0b00: No repetition coding

0b01 : Repeat coding factor is 2

OblO: The repetition coding factor is 4

Obl l : repetition coding factor is 6

Next MBS Frame Offset 8 Frame offset of the next multicast broadcast service.

Next MBS OFDMA Symbol Offset 8 The orthogonal frequency division multiplexing symbol offset of the next multicast broadcast service.

If (Next MBS MAP change if the next multicast broadcast assignment change flag is set indication = 1){

Next MBS No. OFDMA Symbols 2 The number of orthogonal frequency division multiplexing symbols occupied by the next multicast broadcast service assignment message

Next MBS No. OFDMA 6 Number of sub-subchannels occupied by the next multicast broadcast service assignment message

}

MBS Counting feedback allocation No. of feedback allocation indication for multicast broadcast traffic load indication bit map of indication bitmap Multicast

CID for(i = 0; i < No. of feedback

Allocation; i++){

MBS Counting feedback allocation 3 The frame offset of the frame where the uplink assignment of the frame offset(p) is located in the feedback allocation of the multicast broadcast traffic load statistics [the frame offset from the frame receiving this indication is 2 ^P )

}

Padding variable

} It can be seen that MBS_DATA_IE() contains the MBS Counting feedback allocation indication bitmap, the number of feedback assignments, and the feedback allocation of multicast broadcast traffic load statistics. The frame offset of the frame in which the uplink assignment is located (MBS Counting feedback allocation frame offset(p)). Therefore, when the MS parses the MBS Counting feedback allocation indication bitmap of the feedback allocation indication of the multicast broadcast service load statistics corresponding to the CID of the MBS service, the MS considers that The MBS service has an assignment of the feedback resource, and the uplink assignment can be parsed according to the corresponding frame offset to obtain the assignment information of the uplink feedback resource.

Table 2: After adding an indicator bit to indicate MS Resolution Uplink Assignment (UL-MAP)

As can be seen from Table 2, the Extended-MBS-DATA-IE() contains the MBS Counting feedback allocation indication bitmap, the number of feedback assignments, and the multicast broadcast traffic load. The MBS Counting feedback allocation frame offset(p) is the frame offset of the uplink assignment where the statistical feedback is allocated. Therefore, when the MS parses the MBS Counting feedback allocation indication bitmap of the multicast broadcast service load statistics corresponding to the CID of the MBS service, the MSS has the feedback resource corresponding to the MBS service. And, according to the corresponding frame offset, the uplink assignment is parsed according to the corresponding frame to obtain the assignment information of the uplink feedback resource.

Table 3: Added after indicating the indicator bit for the MS Unassigned Assignment (UL-MAP)

As can be seen from Table 3, MBS_DATA_Time_Diversity-IE() contains the feedback allocation indication of the multicast broadcast service load statistics and the frame offset of the frame where the uplink assignment of the multicast broadcast service load statistics is located. (MB S Counting feedback allocation frame offset(p) ). Therefore, when the MS parses the feedback allocation indication position bit of the multicast broadcast service load statistics corresponding to the CID of the MBS service of the MBS service, it is considered that the allocation corresponding to the MBS service has feedback resources, and then the corresponding frame may be offset to the corresponding frame. The uplink assignment is parsed to obtain the assignment information of the uplink feedback resource.

Method 2), carrying an indication bit in a MAC header of the MBS data PDU;

An indication bit is added to the MAC header of the downlink MBS data PDU to indicate that the MS needs to resolve the UL-MAP, and the frame offset information of the UL-MAP to be solved is increased. There are two methods for adding the indication bit and the frame offset information in the MAC header: carrying the indication bit and the frame offset information by using the MAC sub-header; or adding a MAC extension sub-header to carry the indication bit and the frame offset information. .

The method for carrying the MBS load to carry the statistics of the uplink assignment indicator bit by using the MAC sub-head can be extended by the technical personnel in the related art by referring to the related provisions of the MAC sub-header. This article will not be described in detail.

A method of carrying an indication bit and frame offset information by a MAC extension subheader is provided below.

A new MAC extension subheader is used to carry information such as the indication bit and the frame offset of the MBS load statistics uplink assignment. The MBS load statistics uplink assignment extension subheader carrying the above information is given below. Specific forms.

Table 4: MBS Load Statistics Upstream Assignment Indicates Extended Subhead Format

When the MS resolves to the MBS load statistics uplink assignment extension subheader, according to the indication bit and the frame offset, the corresponding frame parsing uplink assignment can be obtained to obtain the assignment information of the uplink feedback resource.

Step 12: The BS specifies one or more uplink feedback resources in the corresponding uplink assignment (UL-MAP). The specified method is that the BS gives the frame offset, position and size of the load statistics feedback resource in the UL-MAP.

The following describes the method of assigning a feedback resource through UL-MAP: The extended uplink interval usage code (Extended UIUC) =0x0b is defined as the UL-MAP_IE of the MBS feedback resource assignment, and the content of this IE is the given feedback resource. Assignment.

Table 5: MBS Load Statistics Feedback Resource Assignment Cell

Step 13: The MS parses the uplink assignment of the load statistics feedback resource corresponding to the MBS service, and the MS selects a resource on the resource specified in the uplink assignment for feedback. The method of feedback is that the MS sends feedback information on the selected uplink resource.

2 is a schematic diagram of an MBS load statistics feedback resource block. As can be seen from the figure, the resources are divided in the time domain and the frequency domain. Wherein, the digital part is the feedback resource part, and the MS can occupy the part on the uplink One resource block is divided into load statistics feedback, the number indicates the serial number of the feedback resource, and "empty" indicates that no information is sent. This part is the spare protection part. The main purpose is to prevent the feedback information sent by the MS from causing interference to subsequent data.

The MS selects a resource on the resource block as shown in Figure 2 for feedback. If a random selection method is used, the random selection may be to obey the average distribution or to map the hash value of the MS to the sequence number of the resource. Those skilled in the art can also implement MS selection of resource blocks by using other random or non-random algorithms. The present invention is not intended to limit the algorithms used herein.

This embodiment provides a method for an MS to obey an average distribution to select a resource. Specifically, the MS may first obtain the number of resource blocks for the MBS service load statistics, and set the value to N; the MS randomly generates an integer between 0 and N-1, and uses the obtained integer as the MS to send feedback information. The resource sequence number is fed back, and the MS can send the feedback information on the obtained feedback resource sequence number.

The following describes an embodiment of transmitting feedback information on a feedback resource. There are many kinds of feedback information sent by the MS, and two of them are given here: A1) transmitting 1-bit feedback information; A2) transmitting a code for identifying a multicast service. Code Division Multiple Access (CDMA) code. However, the present invention does not exclude methods of implementing load feedback in other ways.

A1) transmitting 1-bit feedback information;

The transmitted 1-bit feedback information is a number of Quadrature phase-shift keying (QPSK) modulation symbols. The format of 1-bit feedback information transmitted by the MS in IEEE 802.16e is given below.

Table 6: Feedback sent by MS

In Table 6, Tile(N) represents the Nth Tile. Let k modulation symbols representing the mth Tile of the ^nth feedback channel. The vector index 0 of Table 6 is 8 QPSK modulated symbols. The specific format is as follows:

Table 7: Symbol modulation table vector index of vector index 0 ^M n,%m ^M n, m ₊ l +..., ^ n, _m+ l

0 P0, PI, P2, P3, P0, PI, P2, P3 Where = exp(j *^), l = exp(j *^), 2 = exp(-j *^), 3 = exp (-corpse). A method of mapping 8 modulated symbols on a Tile to a Partial Usage of Subchannels (PUSC) uplink subchannel or an optional PUSC uplink subchannel is shown in FIG. 3. As shown in the figure, there are 12 subcarriers, 4 of which are pilot subcarriers, and the other 8 subcarriers are used to map 8 of the modulated symbols respectively;

Figure 4 shows the subcarrier mapping of the MBS load statistical feedback channel when the PUSC is optional. If there are 9 subcarriers in the picture, one of the subcarriers is a pilot subcarrier, and the other 8 subcarriers are used to map the 8 modulated symbols separately. In order for the modulated symbol (i.e., load feedback information) to be better detected by the BS, the method of transmitting the Orthogonal Frequency Division Multiplexing (OFDM) symbol can be repeated. For example, repeating once, two OFDM symbols having consecutive phases and the same sign are obtained. The method of constructing two consecutive OFDM symbols of the load statistical feedback information will be specifically described with reference to FIG. 5, however, the method does not limit the number of repetitions. Since the setting method of the cyclic prefix as shown in Fig. 5 is used, the phase of the OFDM symbol can be made continuous.

A2) transmitting a CDMA code for identifying a multicast service;

The MS may also send a CDMA code identifying the enjoyment of the multicast service on the allocated feedback resource. If the BS needs the MS to send a CDMA code for feedback, then the feedback resource allocated in step 12 is the resource used to receive the CDMA code. The OFDM symbol shown in Fig. 5 can also be obtained when the modulated CDMA code is transmitted.

The above CDMA code can be notified to the MS by the BS, or can be used by the MS at all for feedback.

Select one of the CDMA codes to feed back. There are many methods for the BS to notify the MS of the CDMA code used for MBS load statistics feedback. Two of them are given here: carried by the broadcast message; carried in the negotiation process of entering the idle state.

The present invention does not limit the method for the BS to generate a CDMA code. The following embodiment assumes that the BS All CDMA code sequences for feedback are already known between the MSs.

A21): Carryed by broadcast message.

The broadcast message in the Uplink Channel Discriptor (UCD) increases the type length value (TLV Length Value: TLV) carrying the CDMA code information, and the format of the TLV is as follows. Table 8: TLV for CDMA Code Information

The format of the CDMA code information is shown in Table 9;

Table 9: CDMA Code Information Format

A22): In the negotiation process of entering the idle state, a TLV of the CDMA Code Index is added to the De/Reregister command (DREG-CMD) message in which the BS and the MS negotiate to enter the idle state. The format of this TLV is as follows.

The CDMA code index is used to let the MS find the corresponding CDMA code, and the CDMA code obtained according to the index is the CDMA code used by the MS for feedback. When the load resource feedback is used in the form of CDMA code, the MS of the feedback can be distinguished by the CDMA code, thereby achieving the purpose of saving time-frequency resources.

Regardless of whether the feedback of the 1-bit information is used or the method of transmitting the CDMA code for identifying the multicast service is used for load statistics feedback, the MS needs to perform further power control when transmitting the feedback information, and the power setting is high. One method, one of which is given here. Those skilled in the art can also select other existing power control methods according to the specific needs of the service, and the present invention is not intended to be MS. The specific means of power control are limited.

The formula for calculating the transmission power by the MS is as follows.

^P TX_IR_MAX = EIRxP _m + BS _ EIRP - RSS + (0^_ ₃₃ - G _{rx SS} ) where ^ is the maximum value of the transmit power, EIRxP _m and _ JRP are the downlink channel description of the broadcast message of the BS (Downlink Channel Descriptor: DCD ) is obtained inside; G _Rx ^ and G ^ are the receiving antenna gain and the transmitting antenna gain of the MS, respectively. If the MS does not get P _JR and BS-EIRP ^ t, then it should transmit with its own minimum transmit power. Step 14: The BS uses the number of feedback information received on the entire MBS load statistical feedback resource as the Idle mode MS load for enjoying the MBS service; and then completes the MBS load statistics.

It can be seen from the foregoing embodiment that the BS performs load statistics feedback for the MS to indicate the uplink resource, so that the MS in the idle state can perform load feedback to the BS, so that the BS can count the idle state of the MS to enjoy a certain MBS service. The Idle mode MS load is used to achieve MBS load statistics.

The second embodiment of the MBS load statistical method of the present invention will be described in detail below. According to FIG. 6, in the embodiment, when load statistics are required, the BS directly specifies one or more uplink feedback resources for load statistics in the cell allocated by the MBS data or the PDU header of the MBS data MAC layer. The method is that the BS gives the time offset, the location, and the size of the uplink feedback resource in the MAC address of the MBS data or the MAC header of the MBS data PDU. When the MS resolves to the uplink feedback resource corresponding to the MBS service, After the configuration, the MS selects a resource on the specified resource for feedback, that is, the MS sends the feedback information on the selected uplink resource. The BS will receive the feedback information as the Idle mode MS that enjoys the MBS service. load.

Step 61: When the BS needs to perform load statistics, it indicates the uplink feedback resource of the load statistics. The BS specifies the method of uplink feedback resources. There are three methods: BS passes the sub-header of the MBS data MAC layer PDU, or through the MAC extension sub-header assignment of the MBS data PDU, or indicates the time offset, location and size of the load statistics uplink feedback resource through the MBS data assignment message. .

When the method in the embodiment of the present invention is applied to a single frequency network (SFN), since each BS in the network receives information on the same frequency, in this case, the uplink feedback resource assigned here It may be synchronized throughout the SFN, so-called SFN intra-synchronization is that the time-frequency resources of the uplink feedback allocated by each BS in the SFN are the same. When the feedback resources in the SFN are synchronized, the feedback received by each BS may be the feedback of the MS within the entire coverage of the UE, and does not limit whether the MS that sends the feedback information synchronizes with itself.

First, the method for indicating the MBS load statistics uplink feedback resource by using the MAC layer PDU sub-head can be extended by the technical personnel in the related art by referring to the relevant provisions of the MAC sub-header. This article is not detailed.

Secondly, a method for indicating a load statistics uplink feedback resource by using a MAC extension subheader is described.

Add a MAC extension subheader that represents the assignment of the resource. The specific form of the extended subheader is given below. There are two methods for the MAC extension subheader to carry the resource assignment: B1) The time relative quantity represents the time offset; B2) The frame offset plus the orthogonal frequency division multiplexing symbol offset represents the time offset.

B 1 ) the relative amount of time represents a time offset;

Table 11: Extended Subheader Format for MBS Load Statistics Feedback Resources I

The Allocation Start Time in Table 11 indicates the start time of the uplink feedback resource, that is, the time point from the receipt of the multicast data PDU to the offset of the Allocation Start Time is the starting point of the uplink feedback resource in time.

B2) frame offset plus orthogonal frequency division multiplexing symbol offset indicates time offset;

Table 12: Extended Subheader Format for MBS Load Statistics Feedback Resources II

Syntax Size(bits) Notes

Allocation Extended Subheader(){ - Resource Allocation Extension Subheader

Extended Subheader Type=7 7 Extended Subhead Type Value is 7

Reserved 4 Reserved

Frame offset 5 frame offset

OFDMA frame offet 8 Orthogonal Frequency Division Multiplexing (OFDM) symbol offset

In Table 12, Frame offset identifies the frame offset, and OFDMA frame offet represents the orthogonal frequency division multiplexing symbol offset. Adding the orthogonal frequency division multiplexing symbol offset based on the frame offset obtains the uplink feedback. A method for assigning a load statistics uplink feedback resource in a cell allocated by the MBS data is: adding an indication bit to the message of the downlink MBS data assignment to indicate that the cell has uplink assignment information and specific assignment information. . In the prior art, three types of cells assigned by MBS data are defined, and three types of cells have two methods for assigning uplink feedback resources: C1) time relative quantity indicates time offset; C2) frame offset plus orthogonal The frequency division multiplexed symbol offset represents a time offset.

C1) Time relative quantity represents time offset

When the MS resolves to the MBS Counting feedback allocation bitmap corresponding to the CID of the MBS service of the MBS service, it is considered that the MBS service has an allocation of the feedback resource, and the subsequent field is parsed to obtain a specific Assignment information. The Allocation Start Time in Table 13 indicates the start time of the uplink feedback resource, that is, the time point from the receipt of the multicast data PDU to the offset of the Allocation Start Time is the starting point of the uplink feedback resource in time.

Table 14: Adding Load Statistics After the Upstream Feedback Resource Assignment Information

When the MS resolves to the MBS Counting feedback allocation bitmap corresponding to the CID of the MBS service of the MBS service, it is considered that the MBS service has an allocation of the feedback resource, and the subsequent field is parsed to obtain a specific Assignment information. The Allocation Start Time in Table 14 indicates the start time of the uplink feedback resource, that is, the time point from the receipt of the multicast data PDU to the offset of the Allocation Start Time is the uplink feedback resource. The starting point in time.

Table 15: Adding Load Statistics Upstream Feedback Resources Format of MBS_DATA_Time-Diversity-IE () after assigning information I

When the MS resolves the multicast broadcast service load statistical feedback allocation flag corresponding to the CID of the MBS service, the MS considers that the MBS service has the assignment of the feedback resource, and then parses the subsequent field. Get specific assignment information. The Allocation Start Time in Table 15 indicates the start time of the uplink feedback resource, that is, the time point from which the Allocation Start Time is offset from the reception of the multicast data PDU is the starting point of the uplink feedback resource in time.

C2) frame offset plus orthogonal frequency division multiplexing symbol offset represents time offset

Allocation; i++){

When the MS resolves to the MBS Counting feedback allocation bitmap corresponding to the CID of the MBS service of the MBS service, it is considered that the MBS service has an allocation of the feedback resource, and the subsequent field is parsed to obtain a specific Assignment information.

Table 17: Adding Load Statistics After the Upstream Feedback Resource Assignment Information

Table 18: Increased load statistics after the upstream feedback resource is assigned information

When the MS resolves to the multicast broadcast service load statistics feedback allocation identifier corresponding to the CID of the MBS service, it is considered that the MBS service has the assignment of the feedback resource, and then parses the subsequent fields to obtain the specific assignment information.

Step 62: The MS parses the uplink assignment of the load statistics feedback resource corresponding to the MBS service, and the MS selects a resource on the resource specified in the uplink assignment for feedback. The feedback method is that the MS sends the feedback information on the selected uplink resource, and the specific implementation manner is referred to the relevant part of the first embodiment;

Step 63: The BS uses the number of feedback information received on the entire MBS load statistical feedback resource as the Idle mode MS load of the MBS service; and then completes the MBS load statistics.

As can be seen from the foregoing embodiment, the BS performs load statistics feedback for the MS to indicate the uplink resource, so that the idle MS can perform load feedback to the BS to enable the BS to count the idle state. The MS enjoys the situation of an MBS service, implements the Idle mode MS load, and realizes the MBS load statistics.

Next, a third embodiment of the MBS load statistical method of the present invention will be described. In this embodiment, the BS first reserves a feedback resource corresponding to a certain MBS service. Then when the BS needs to do the load statistics of the MBS service, the BS uses a feedback indicator to indicate that the MS needs feedback. The MS can obtain specific feedback resources according to the reserved resources and feedback indication bits, and select a resource for feedback. Finally, the BS uses the number of feedback information received on the entire MBS load statistics feedback resource as the Idle mode MS load for enjoying the MBS service.

Referring to Figure 7, this embodiment is specifically:

Step 71: The BS assigns the fed back resource to the MS, where the feedback resource is reserved.

The BS reserves one or several uplink feedback resources for load statistics for the MBS load statistics, and then the BS informs the MS of the feedback resources of the MBS by broadcasting the message or when the MS joins the MBS service.

In the case where the MS feedback resource is notified by a broadcast message, if there are multiple MBS services, there may be multiple resource assignments corresponding to each other.

The following describes the method for the BS to reserve feedback resources. Specifically, a type length value (TLV) for adding a reserved resource is added to the UCD or the Dynamic Service Addition Request/Response (DSA-REQ/RSP) message, and the value is increased. The specific form of the TLV is shown in Table 19:

Table 19: TLVs assigned reserved resources

The format of the resource allocation field (Allocation Information) is shown in Table 20;

Table 20: Resource Assignment Fields (Allocation Information) Format

Syntax Size(bits) Notes

Allocation Information(){ - Assignment Information

OFDMA Symbol offset 8 Orthogonal Frequency Division Multiplexing (OFDM) symbol offset

Subchannel offset 7 Subchannel offset

No. OFDMA symbols 4 Number of orthogonal frequency division multiplexing symbols

No. Subchannels 5 Number of subchannels

} Of course, there may be other methods of assignment, which is not limited in this embodiment.

Step 72: When the BS needs to perform load statistics, an indicator bit is used to indicate that the MS needs to perform feedback. The method of carrying this indicator bit includes: carrying in the MAC header of the MBS PDU; carried in the cell assigned by the downlink MBS data.

Method 1: Passing the indicator bit of the MAC header of the MBS data PDU

When the BS is to perform MBS load statistics, when the BS transmits the MBS PDU, the BS carries a 1-bit indicator bit in the MAC header to instruct the MS to perform MBS load feedback. There are three methods for carrying the indication bit in the MAC header: carrying in the universal MAC header; adding a MAC sub-header of the MBS load statistics feedback indication to carry; adding a MAC extension sub-header of the MBS load statistics feedback indication to carry.

The method for carrying the indication bit by the MAC sub-head to indicate that the MS needs to perform feedback may be extended by the technician in the prior art by referring to the relevant provisions of the MAC sub-header. This article is not detailed here.

The following describes the method of carrying the indicator bit through the universal MAC header and carrying the pointer through the MAC extension subheader:

1) Carrying an MBS load statistics feedback indication bit by using a universal MAC header, the indication bit is used to indicate an action of the MS to perform load feedback. Specifically, 1 bit reserved in the general MAC header is used as the indication bit. FIG. 8 is a schematic diagram of a structure of a MAC header supporting an MBS feedback indication. As shown in the figure, a general MAC header includes: a header type (Header Type: HT); an encryption control (Encryption Control: EC); a type (Type); an extended sub-header field. (Extended subheader field: ESF); indicates a cyclic redundancy check (cyclic redundancy check indicator: CI) ; force bad mouth thick copper sequence No. ¹ J (Encryption key sequence: EKS) ; MBS feedback indication load statistics ( MBS Indication: MBS Ind); Length (Length: LEN); Most significant bit (MSB); Least significant bit (LSB); Connection Identifier (CID); Header-Danger歹'J (Header check sequence: HCS) „

Defining the MBS Ind bit in this embodiment indicates that the MS needs feedback, and the frame offset of the feedback and the location of the specific time-frequency resource are available in the UCD broadcast message or when the MBS connection is established.

2) carrying the MBS load statistical feedback indication bit through the MAC extension subheader, where the indication bit is used The action of instructing the MS to perform load feedback. Specifically, an indication bit for instructing the MS to perform load feedback is added, and the specific form of the extended subheader of the added feedback indication is as follows:

Table 21 Feedback indicates the format of the extended subheader

In Table 21, the MBS Counting feedback indication bit is

At 1 o'clock, the MS needs feedback, and the frame offset of the feedback and the location of the specific time-frequency resource are available in the UCD broadcast message or when the MBS connection is established (refer to step 41).

Method 2: The indicator bit is carried in the cell to which the downlink MBS data is assigned. Specifically, when the BS performs MBS load statistics, the BS carries an indication bit indicating that the MS performs feedback in the message of the downlink MBS data assignment. The following describes the method for increasing the load statistical feedback indication bit of the IEEE 802.16e three MBS data assignment cells.

When the MS resolves to the multicast broadcast service load statistics feedback instruction bit mapping position corresponding to the CID of the MBS service, it considers that the MBS service needs feedback, and then obtains the allocation information of the uplink feedback resource according to the reserved assignment.

Table 24: Format of MBS_DATA_Time_Diversity-IE () after adding the load statistics feedback indicator

When the MS resolves the multicast broadcast service load statistical feedback indication position bit corresponding to the CID of the MBS service, it considers that the MBS service needs feedback, and then obtains the allocation information of the uplink feedback resource according to the reserved assignment.

Step 73: The MS parses the uplink assignment of the load statistics feedback resource corresponding to the MBS service, and the MS selects a resource on the resource specified in the uplink assignment for feedback. The method of feedback is that the MS sends feedback information on the selected uplink resource. For a specific implementation, refer to the relevant part of the first embodiment.

Step 74: The BS uses the number of feedback information received on the entire MBS load statistical feedback resource as the Idle mode MS load of the MBS service; and then completes the MBS load statistics.

As shown in the foregoing embodiment, the BS reserves the uplink resources for the load statistics of the MS. Therefore, when the BS indicates the idle state MS to perform load feedback, the idle MS can occupy the reserved uplink resources for the load. Feedback, so that the BS can count the idle state of the MS to enjoy a certain MBS service, realize the Idle mode MS load, and realize the MBS load statistics.

A fourth embodiment of the MBS load statistical method of the present invention will be described below. In this embodiment, when the MS enters the Idle mode, if the MS continues to enjoy a certain MBS service, the upper layer allocates an MBS User Index to the MS, and then the BS transmits the MS to the MS; when the BS needs to do some When MBS load statistics, the BS allocates a feedback resource for each MS that enters the Idle mode and enjoys the MBS. The resource number corresponds to the MBS User Index, and the MS is assigned to the BS. Feedback on its own resources; the number of feedbacks that the BS will receive is used as the Idle mode MS load to enjoy this MBS service. The present embodiment will be specifically described with reference to Fig. 9 .

Step 91: The BS allocates the MBS User Index to the MS.

The method for assigning the MBS User Index to the MS by BS is given below.

Add a TLV of the MBS User Index to the De/Reregister command: DREG-CMD message in the negotiation between the BS and the MS. The format of this TLV is as follows.

The MBS User Index corresponds to a unique MBS service in the entire MBS Zone, and is mainly used to identify the MS of the Idle mode that enjoys an MBS service in the MBS Zone.

Since the location and status of the MS in the MBS Zone are changed, in this embodiment, the MBS User Index update method needs to be provided: When the MS performs location update or sends multicast data, the BS can update the MBS User Index for the MS. In this way, the MBS User Index of the MS that enjoys the Idle mode of the MBS can be allocated as much as possible, and when the load statistics are required, the allocated resources can be minimized. In general, the BS assists the MS to update the MBS User Index. The following two types can be used: The MBS User Index is updated when the MS performs location update; or the MBS User Index is updated when the BS sends MBS data. The specific implementation of the two methods is provided below.

Method 1: Update the MBS User Index when the location is updated.

When the MS of the Idle mode performs location update, the Ranging Response (RNG-RSP) message sent by the BS carries the MBS User Index TLV, and the MS updates its MBS User Index after receiving the MBS User Index TLV. The MBS User Index in the TLV is as follows. The method of adding the MBS User Index TLV to the RNG-RSP is as follows.

Table 26: TLV format for MBS User Index added in RNG-RSP

Method 2: Update MBS User Index when sending MBS data

When the BS is transmitting multicast data, it can update the MBS User for the Idle mode MS. The specific method of Index ₀ is to add a subheader or an extension subheader in the MAC header of the MBS data PDU. The subheader or extension subheader carries the old MBS User Index and the new MBS User Index. When the MS receives the MBS data, the MS resolves to match the old MBS User Index with its own MBS User Index, and the MS updates its MBS User Index to the new MBS User Index in the MBS Data PDU MAC header. Of course, a plurality of such MBS User Index update information can be carried in one MBS data PDU.

The following provides a specific form of adding the MAC extension subheader of the MBS User Index.

Table 27: MAC Extension Subheader Format for MBS User Index

Step 92: The BS specifies an uplink feedback resource of the load statistics to the MS.

The method for the BS to assign an uplink feedback resource for load statistics includes:

1) The BS in the transmitted MBS data PDU or the cell assigned in the MBS data indicates that the MS needs to resolve the uplink assignment. In the uplink assignment, the BS allocates feedback resources for each MS that enters the Idle mode and enjoys the MBS service. . For the specific method, refer to the related content of the first embodiment. However, since the MBS User Index is used in this embodiment, the number of resource blocks assigned in this embodiment is the maximum value of the allocated MBS User Index, and the In one embodiment, the number of uplink feedback resources is determined by the BS itself.

2) The BS carries the resource assignment in the MAC sub-header of the MBS data PDU or the MAC extension sub-header or in the cell assigned by the MBS data. This resource is for each MS assignment that enters the Idle mode and enjoys the MBS service. Feedback resources. For the specific method, refer to the related content of the second embodiment. However, since the MBS User Index is used in this embodiment, the number of resource blocks assigned in this embodiment is the maximum value of the already allocated MBS User Index. When the method in the embodiment of the present invention is applied to a single frequency network (SFN), since each BS in the network receives information on the same frequency, in this case, the uplink feedback resource assigned here may be The entire SFN is synchronized, and the so-called SFN internal synchronization is the time-frequency of the uplink feedback allocated by each BS in the SFN. The source is the same. When the feedback resources in the SFN are synchronized, the feedback received by each BS may be feedback of the MS within its entire coverage, and does not limit whether the MS that sends the feedback information synchronizes with itself.

Step 93: The MS feeds back on the specified resource. Based on the correspondence between the MBS User Index and the feedback resource sequence number, the MS can obtain the specific location of the feedback resource used by the load statistics, and the MS can feedback on the specified resource. The information transmitted by the specific feedback is the same as that related to the first embodiment.

Step 94: The BS uses the number of feedback information received on the entire MBS load statistical feedback resource as the Idle mode MS load of the MBS service; and then completes the MBS load statistics.

In this embodiment, the MBS User Index is used to allocate the uplink resources required for the load feedback of the MS, and the MS performs feedback on the allocated resources of the system. Compared with the feedback that the MS selects the uplink resource for feedback in the foregoing embodiment, This embodiment avoids the conflicts caused by the MSs when they select the uplink resources, and prevents the different MSs from being fed back on the same uplink resources, so that the load statistics are reduced. Therefore, the load statistics obtained in this embodiment are more accurate.

One of ordinary skill in the art will appreciate that all or part of the steps in implementing the above-described embodiments can be accomplished by a program that instructs related hardware, which can be stored in a computer readable storage medium. The storage medium may be a read only memory, a magnetic disk or an optical disk or the like.

When the program for storing and the computer readable medium is executed, the method includes the following steps: For the determined MBS, the base station BS assigns an uplink feedback resource to the mobile terminal MS in the idle state; and the BS uses the feedback of the uplink feedback resource to detect the MS. Identifies the information that receives the MBS service, and counts the number of received messages.

Referring to FIG. 10, the following describes a first base station device embodiment of the present invention, including:

An uplink resource assignment unit 101, configured to specify an uplink feedback resource;

The information encapsulating unit 102 is configured to add information about the uplink feedback resource to a preset data packet.

The sending unit 103 is configured to send, to the MS in the idle state, a protocol packet PDU that includes the uplink feedback resource information.

Based on the foregoing device structure, the information encapsulating unit is specific:

Adding the uplink feedback resource information to the uplink assigned cell, and, in the MBS data index Adding information for parsing the uplink assigned cell to the PDU header of the MAC layer of the allocated cell or the MBS; or

Adding information of the uplink feedback resource to the cell to which the MBS data is assigned; or adding the information of the uplink feedback resource to the MAC layer PDU header of the MBS; or

Adding the information of the uplink feedback resource to the broadcast message, or adding the information of the uplink feedback resource to the negotiation message when the MS joins the determined MBS service; and, the message that is assigned in the downlink MBS data or the MAC address in the MBS Adding an indicator bit in the PDU header of the layer indicates that the MS performs feedback.

Referring to FIG. 11, the second base station device embodiment of the present invention includes: an uplink resource assignment unit 111, an information encapsulation unit 112, a sending unit 113, a receiving unit 114, and a statistics unit 115. The line resource assignment unit 111, the information encapsulating unit 112, and the sending unit 113 refer to related content of the first base station device embodiment;

The receiving unit 114 is configured to detect the received information on the uplink feedback resource.

The statistic unit 115 is configured to count the number of information detected by the receiving unit.

Based on the foregoing first or second base station device embodiment, the base station device may further include:

a list maintenance unit, configured to maintain a list of the idle state MSs; and send the list of the MSs by the sending unit;

The uplink resource assignment unit further specifies, for the determined MBS, the corresponding uplink feedback resource for the idle state MS.

In the foregoing device embodiment, the MBS data assignment cell is specifically: MBS data assignment cell MBS_DATA_IE, or MBS data time diversity cell MBS_DATA_Time_Diversity-IE, or extension The MBS data cell Extended_MBS_DATA_IE; the MAC layer PDU header of the MBS is specifically: a protocol data packet subheader of the MBS media control layer MAC or an extended subheader of the protocol data packet of the MBS media control layer.

Referring to FIG. 12, the following describes a first mobile terminal embodiment provided by the present invention, including: a receiving unit 121, configured to acquire a protocol data packet PDU sent by a base station;

The parsing unit 122 is configured to obtain information about an uplink feedback resource included in the PDU. The feedback unit 123 occupies the uplink feedback resource to perform load feedback. Specifically, the feedback unit may select one unit resource in the uplink feedback resource to perform load feedback according to a preset rule, where the feedback unit selects a feedback resource. Use a randomly selected method, etc., for details, refer to the relevant part of the first method embodiment;

The sending unit 124 sends a protocol data packet including the load feedback information.

The manner in which the feedback unit occupies the uplink feedback resource includes:

Referring to FIG. 13, a second mobile terminal embodiment of the present invention is specifically illustrated. The mobile terminal includes: a receiving unit 131, a parsing unit 132, a feedback unit 133, a sending unit 134, and an MBS user index maintaining unit 135;

The receiving unit 131 is configured to acquire a protocol data packet PDU sent by the base station;

The parsing unit 132, the information about the uplink feedback resource included in the PDU, and the correspondence between the uplink feedback resource carried in the PDU and the MBS user index of the mobile terminal;

The feedback unit 133 occupies the uplink feedback resource to perform load feedback. Specifically, the corresponding feedback relationship between the MBS user index and the uplink feedback resource of the mobile terminal occupies the allocated uplink feedback resource for load feedback;

a sending unit 134, sending a protocol packet including the load feedback information

The MBS user index maintenance unit 135 is configured to save an MBS user index of the mobile terminal acquired by the receiving unit.

On the basis of the foregoing embodiment, the manner in which the parsing unit acquires the uplink feedback resource includes:

Acquiring the information of the uplink assigned cell from the PDU header of the MAC layer of the MBS data or the PDU header of the MAC layer of the MBS, and obtaining the information of the uplink feedback resource by parsing the uplink assigned cell; or, feeding back information of the resource; Or,

The information of the uplink feedback resource is obtained from a broadcast message or a negotiation message of the BS when the MS joins the determined MBS service.

In the foregoing device embodiment, the MBS data assignment cell is specifically: MBS data assignment cell MBS_DATA_IE, or MBS data time diversity cell MBS - DATA - Time - Diversity - IE, or extended MBS data cell Extended - MBS - DATA - IE; MACS PDU header of the MBS is specifically: MBS media control layer MAC protocol packet sub-header or MBS media The extension subheader of the protocol packet of the control layer.

The method and the related device for the multicast/broadcast service load statistics provided by the present invention are described in detail above. For those skilled in the art, according to the idea of the embodiment of the present invention, in the specific implementation manner and the application range, There are variations, and the description is not to be construed as limiting the invention.

Claims

Rights request

1. A multicast/broadcast service MBS load statistics method, characterized by:

For the determined MBS, the base station BS assigns an uplink feedback resource to the mobile terminal MS in the idle state; the BS detects, in the uplink feedback resource, the information fed back by the MS for identifying the MBS service, and counts the number of received information.

2. The method of claim 1 wherein:

The method for the BS to allocate the uplink feedback resource to the MS in the idle state is as follows: The BS instructs the MS to parse the uplink assignment cell, and the BS allocates the uplink feedback resource in the uplink assignment cell.

The method according to claim 2, wherein the BS instructs the MS to parse the uplink assigned cell by:

The BS instructs the MS to parse the uplink assigned cell in the cell to which the MBS data is assigned; or the BS instructs the MS to parse the uplink assigned cell in the protocol packet PDU header of the MBS media access control MAC layer.

4. The method of claim 1 wherein:

The BS assigns an uplink feedback resource to the cell to which the MBS data is assigned; or

The BS assigns an uplink feedback resource in the MAC layer PDU header of the MBS.

5. The method of claim 1 wherein:

And assigning the uplink feedback resource to the MS in the idle state by the BS is specifically: the BS assigning an available uplink feedback resource by using a broadcast message or when the MS joins the determined MBS service;

Carrying an indication bit indication in the cell to which the downlink MBS data is assigned

Or the information of the MBS service; or, the indicator bit in the PDU header of the MAC layer of the MBS indicates that the MS feedback is used to identify the information for receiving the MBS service.

6. A method according to any one of claims 1 to 5, characterized in that:

For the determined MBS, the BS maintains a list of the idle state MSs, and the BS delivers the list to the MS;

7. The method of claim 6 wherein:

When the MS performs location update, the BS issues the list; or,

When the BS sends data to the MS, the MS carries the MS list in the MAC layer PDU header of the MBS.

8. A method according to any one of claims 1 to 5, characterized in that: The information format of the BS in the uplink feedback resource detection MS feedback is specifically: at least two consecutive orthogonal frequency division multiplexing OFDM symbols.

9. The method according to any one of claims 1 to 5, wherein at least two BSs detect feedback information of the MS on the same frequency, and are characterized by:

The BS is an uplink feedback resource synchronization that is assigned by the MS; and the BS detects the feedback information of the MS on the same time-frequency resource.

10. A method according to any one of claims 3 to 5, characterized in that:

The cells to which the MBS data is assigned are specifically: MBS data assignment cells, or MBS data time diversity cells, or extended MBS data cells.

11. A method as claimed in any one of claims 3 to 5, characterized in that:

The MAC layer PDU header of the MBS is specifically: an MBS media control layer MAC protocol data packet header or an extended subheader of a protocol data packet of the MBS media control layer.

12. A base station device, comprising:

An uplink resource assignment unit, configured to specify an uplink feedback resource;

The information encapsulating unit is configured to add the information of the uplink feedback resource to the preset data packet, and the sending unit is configured to send, to the MS in the idle state, a protocol data packet PDU that includes the uplink feedback resource information.

13. Apparatus according to claim 12 wherein:

The information encapsulating unit adds the uplink feedback resource information to the uplink assigned cell, and adds the uplink assigned cell to the PDU header of the MAC layer of the MBS data or the MAC layer of the MBS. Information.

14. Apparatus according to claim 12 wherein:

The information encapsulating unit adds the information of the uplink feedback resource to the cell to which the MBS data is assigned; or adds the information of the uplink feedback resource to the MAC layer PDU header of the MBS.

15. Apparatus according to claim 12 wherein:

Specifically, the information encapsulating unit adds the information of the uplink feedback resource to the broadcast message, or adds the information of the uplink feedback resource to the negotiation message when the MS joins the determined MBS service;

Adding an indication bit in the downlink MBS data assigned cell or in the PDU header of the MAC layer of the MBS indicates that the MS performs feedback.

The device according to any one of claims 13 to 15, further comprising: a receiving unit, configured to detect the received information on the uplink feedback resource;

A statistical unit, used to count the number of information detected by the receiving unit.

The device of claim 16, further comprising:

a list maintenance unit, configured to maintain a list of idle state MSs; and send the

a list of MS; and,

The uplink resource assignment unit further specifies an uplink feedback resource corresponding to the MS list for the determined MBS.

18. Apparatus according to claim 16 wherein:

19. Apparatus according to claim 16 wherein:

20. A mobile terminal, comprising:

a receiving unit, configured to acquire a protocol data packet PDU sent by the base station;

a parsing unit, acquiring information about an uplink feedback resource included in the PDU;

a feedback unit, occupying the uplink feedback resource for load feedback;

The sending unit sends the load feedback information.

21. The mobile terminal of claim 20, wherein:

The feedback unit selects one unit resource in the uplink feedback resource for load feedback according to a preset rule; or

The mobile terminal further includes:

An MBS user index maintenance unit, configured to save an MBS user index of the mobile terminal acquired by the receiving unit, and

The parsing unit further acquires a correspondence between the uplink feedback resource carried in the PDU and the MBS user index;

The feedback unit uses the corresponding uplink feedback resource to perform load feedback according to the corresponding relationship between the MBS user index and the uplink feedback resource.

22. The mobile terminal of claim 20 or 21, wherein: The parsing unit obtains the information of the uplink assigned resource from the PDU header of the MAC layer of the MBS data or the PDU header of the MAC layer of the MBS, and obtains the information of the uplink feedback resource by parsing the uplink assigned cell; or Feedback resource information; or,

The information of the uplink feedback resource is obtained from a broadcast message or a negotiation message when the MS joins the determined MBS.

23. The mobile terminal of claim 22, wherein:

The feedback unit performs load feedback specifically:: feeding back at least two consecutive OFDM symbols.

24. The mobile terminal of claim 22, wherein:

25. The mobile terminal of claim 22, wherein: