WO2009052745A1

WO2009052745A1 - A feedback method, system and device for the multicast broadcast assign information

Info

Publication number: WO2009052745A1
Application number: PCT/CN2008/072695
Authority: WO
Inventors: Hongliang Xu; Juejun Liu; Sean Mcbeath
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2007-10-19
Filing date: 2008-10-15
Publication date: 2009-04-30
Also published as: CN101414897A

Abstract

A feedback method, system and device for the multicast broadcast assign information. The feedback method for the multicast broadcast assign information includes the steps that the base station BS transmits the multicast broadcast assign information to the mobile station MS (S101); the BS determines that the MS receives the assign information correctly according to the ACK information fed back from the MS (S102). According to the implementation of present invention, the MS feeds back the correct ACK information to the BS when MS receives the multicast broadcast assign information and decodes it correctly, the BS is enabled to be aware that the MS has received the multicast broadcast assign information correctly, so that the resource waste caused by that the BS doesn't know whether the MS has received the multicast broadcast assign information can be avoided, and the resource utilization ratio is improved.

Description

Method, system and device for feeding back multicast broadcast assignment information

Technical field

Embodiments of the present invention relate to the field of network communication technologies, and in particular, to a method, system, and apparatus for feeding back multicast broadcast assignment information. Background technique

The IEEE 802.16 control message is broadcast to all MSs (Mobile Stations, mobile terminals), such as assigned information. Since the broadcast message does not need to be fed back, the BS (Base Station) cannot know whether the mobile terminal correctly receives the control message, so the BS needs to transmit the control information by using a relatively low-order modulation and coding method, so that the mobile terminal can The control information is correctly received and correctly decoded. The existing IEEE 802.16e assignment of MS resources is a form of single frame assignment, which is easy to waste resources. Therefore, continuous assignment is introduced in IEEE802.16e Rev2. The persistent assignment refers to the BS-assignment of resources to the MS for a period of time, that is, the assignment message is carried only in the first frame during this period, and the persistent assignment information is used on other frames.

In the case of downlink persistent assignment, the MS receives data by receiving a downlink assignment message. In the case of uplink persistent assignment, the MS transmits data by receiving an uplink assignment message. Since the DL-MAP (Downlink-Ma, Downlink-Malaying) message and the UL-MAP (Uplink-Map) message are broadcast without feedback, the BS cannot know whether the MS has received the downlink or uplink persistent assigned cell. . If the MS receives a DL-MAP message or a UL-MAP message error, the resources assigned to the MS in the downlink or uplink persistent assigned cell cannot be used by the MS, nor can it be scheduled to another MS, so this resource is wasted. . In the prior art, only the number of retransmissions of the HARQ exceeds the maximum number of times, the default MS does not receive the downlink or uplink assignment message, and the two parties automatically cancel the previous downlink or uplink persistent assignment. This is actually a waste of resources.

The existing downlink or uplink persistent assigned cells may also update and cancel the resources of the MS downlink persistent assignment. If the downlink or uplink persistent assigned cells of the continuously assigned resources are not correctly decoded by the MS, A waste of resources. Moreover, if the data received by the MS on the downlink persistently assigned resource does not support HARQ, the MS does not feed back the correctness of the data decoding, so the BS is even less aware of whether the MS has received the downlink persistent assigned cell. This results in a waste of resources during the continuous assignment of the downlink.

In carrying out the process of the present invention, the inventors have found that the prior art has at least the following problems:

The BS cannot know whether the MS has received the persistent assigned cell. When the MS does not correctly receive the persistent assigned cell, the resource assigned to the MS cannot be used by the MS or dispatched to other MSs, thus causing waste of resources. . Summary of the invention

The embodiment of the invention provides a method, a system and a device for feeding back multicast broadcast assignment information, so as to realize that the BS knows as early as possible whether the MS has received the persistent assignment cell, and reduces resources caused by not receiving the persistent assignment cell. waste.

To achieve the above objective, an embodiment of the present invention provides a method for feeding back multicast broadcast assignment information, including the following steps: The base station BS sends multicast broadcast assignment information to the mobile terminal MS; and the BS according to the MS feedback The confirmation information determines that the MS correctly receives the assignment information.

In another aspect, the embodiment of the present invention further provides a feedback system for multicast broadcast assignment information, including: a mobile terminal MS, configured to receive multicast broadcast assignment information, and feed back confirmation information; The MS sends the multicast broadcast assignment information, and determines, according to the acknowledgement information fed back by the MS, that the MS correctly receives the multicast broadcast assignment information.

In a further aspect, the embodiment of the present invention further provides a base station BS, including: an assignment information sending module, configured to send multicast broadcast assignment information to the MS; and an acknowledgement information receiving module, configured to receive the acknowledgement information fed back by the MS And a determining module, configured to determine, according to the acknowledgement information received by the acknowledgement information receiving module, that the MS correctly receives the multicast broadcast assignment information. In a further aspect, the embodiment of the present invention further provides a mobile terminal MS, including: an information receiving module, configured to receive multicast broadcast assignment information sent by a BS, and an acknowledgement information feedback module, configured to send feedback to the BS information.

Compared with the prior art, the embodiment of the present invention has the following advantages: By receiving the acknowledgment information of the assignment information received by the MS, the BS can learn whether the MS receives the multicast broadcast assignment information as soon as possible, thereby It is possible to avoid waste of resources due to the MS not receiving persistent assigned cells. DRAWINGS

1 is a flowchart of a method for feeding back multicast broadcast assignment information according to an embodiment of the present invention; FIG. 2 is a flowchart of Embodiment 1 of the present invention;

3 is a flowchart of Embodiment 2 of the present invention;

4 is a flowchart of Embodiment 3 of the present invention;

FIG. 5 is a structural diagram of Embodiment 4 of the present invention. detailed description

The embodiment of the present invention provides a method for feeding back multicast broadcast assignment information. According to the embodiment of the present invention, the BS can quickly learn whether the MS receives the multicast broadcast assignment information sent by the BS, and does not receive the multicast message in the MS. When the assignment information is broadcast, the previous assignment is automatically cancelled, thereby avoiding the waste of resources caused by the MS receiving the multicast broadcast assignment information. The method provided by the embodiment of the present invention can be used not only for feedback of multicast broadcast assignment information of data, but also for other occasions requiring feedback on multicast broadcast assignment information, for example: CQI (Channel Quality Indicator) channel The feedback of the assignment information, the single frame resource assignment information, and the like may be applied to the feedback of the assignment information in the multicast broadcast assignment message.

As shown in FIG. 1 , a flow chart of a method for feeding back multicast broadcast assignment information according to an embodiment of the present invention includes:

Step S101: The BS sends multicast broadcast assignment information to the MS. The multicast broadcast refers to the distribution letter The information includes persistently assigned cells, and the persistent assigned cells are given the resources occupied by the MS: the resources in a few frames, the location of the MS in the persistent downlink or uplink persistent assigned resources, and the size of the occupied resources. Preferably, the embodiment of the present invention adds a piece of information to the persistent assigned cell: an ACK offset, which gives an offset of the ACK channel occupied by the feedback of the MS for the persistent assigned cell in the ACK region. That is, the initial position of the ACK channel that the MS can occupy for the feedback of the persistent assigned cell in the entire ACK area. In a persistent assignment, all MSs sequentially obtain their own ACK channel based on their persistent assigned cells in the persistent assigned cells. If the MS has multiple persistent allocated resources in a persistent assigned cell, the BS only allocates an ACK channel for feedback acknowledgement information to the MS's first persistent assigned resource, and does not give other persistent assigned resources of the MS. An ACK channel for which feedback confirmation information is allocated. There are many methods for adding the information of the ACK offset in the persistent allocation cell. The embodiment of the present invention only uses one of the methods as an example: adding an ACK offset field to the persistent assigned cell, the length of the field It can be 8 bits.

Step S102: The BS determines, according to the acknowledgement information fed back by the MS, that the MS correctly receives the multicast broadcast assignment information. The MS provides feedback for the persistent assigned cells, including the uplink persistent assigned cells and the downlink persistent assigned cells, so that the BS can determine whether the MS has received the persistent assigned cells. If the MS receives the persistent assignment cell and decodes correctly, the MS feeds back the ACK on the BS-specified ACK channel, otherwise the MS does not feed back any information, which is equivalent to the MS's NAK. In this way, the BS can determine whether the MS has correctly received the persistent assigned cell, so that the subsequent process can be continued, such as sending data to the MS, or receiving data sent by the MS using the assigned resource. If the BS does not receive feedback from the MS, the above persistent assignment is automatically cancelled and the BS may choose to resend the persistent assignment to the MS.

Considering that the BS can selectively cause the MS to feed back the reception condition of the persistent assigned cell, the BS can add an indication bit in the persistent assigned cell whether the persistent assigned cell needs feedback, when the indication bit is set, for example: When the indication bit is 1, the BS further sets, for each MS, an MS feedback indication bit that the MS needs to feed back. The MS feedback indication bit is used to indicate whether the MS needs feedback acknowledgement information. BS can be based on the current channel of the MS The status determines whether an MS feedback confirmation message is needed. Only when the MS feedback indicates the position bit, for example: 1 , the MS feeds back to the BS the confirmation information about the continuous assignment of the cell, otherwise the MS does not need to feed back any information. If the cell feedback indication bit is not set, for example: 0, then the BS does not need to set the MS feedback indication bit in the persistent assignment cell, so all MSs with persistent assignments in the persistent assignment cell are There is no need to feed back any confirmation information to the BS. As long as the BS does not require the MS to provide feedback information for the persistent assigned cells, the BS processes the subsequent processes in accordance with the prior art.

The method for feeding back the multicast broadcast assignment information, when receiving the persistent assignment cell and correctly decoding, the MS feeds back the acknowledgement information to the BS, so that the BS knows that the MS has correctly received the persistent assignment cell, if the MS does not send the BS to the BS. After the feedback confirmation information, the BS determines that the MS does not correctly receive the persistent assignment cell, and therefore does not continue the subsequent process, and automatically cancels the previous assignment, thereby avoiding that the MS does not receive the multicast broadcast assignment information. The resulting resources are wasted and resources are saved.

As shown in FIG. 2, which is a flowchart of Embodiment 1 of the present invention, in the case of downlink persistent assignment, the process for the MS to receive data by receiving downlink multicast broadcast assignment information includes the following steps:

Step S201: The BS broadcasts the DL-MAP message to the MS, where the DL-MAP message carries a downlink persistent assignment cell, where the downlink persistent assignment cell gives a situation in which the MS occupies resources: for example, once a few frames have resources, the MS Information such as the location in the persistent allocation resource and the size of the occupied resource in the entire downlink. The embodiment of the present invention adds a piece of information to the downlink persistent assigned cell: an ACK offset, the ACK offset information has two meanings to index the ACK channel of the MS, and the first meaning is that the ACK offset is given by the MS. The offset of the ACK channel that can be occupied by the feedback of the downlink persistent assigned cell in the uplink ACK region, that is, the start position of the ACK channel that the MS can occupy for the feedback of the downlink persistent assigned cell in the entire uplink ACK region. The second meaning is that the ACK offset gives the offset of the ACK channel occupied by the feedback delay of the MS for the downlink persistent assigned cell in the Fast Feedback region, that is, the MS for the downlink persistent assigned cell. The initial position of the ACK channel that can be occupied in the entire Fast Feedback area is fed back, and each ACK information is sent on a Fast Feedback channel. In the downlink continuous assignment, all MSs are based on The continuation of the assignment information in the downlink continues to assign the location order in the cells to obtain its own ACK channel. If the MS has multiple persistently allocated resources in a downlink persistent assigned cell, the BS only allocates an ACK channel for feedback acknowledgement information to the MS's first persistent assigned resource, and does not give other persistent assignments to the MS. The resource allocates an ACK channel for feedback confirmation information. There are many methods for adding the information of the ACK offset in the downlink persistent assigned cell. The embodiment of the present invention only uses one of the methods as an example: adding an ACK offset field to the downlink assigned cell, the field The length can be 8 bits.

Considering that the BS can selectively cause the MS to feed back the reception status of the downlink persistent assigned cell, the BS may add an indication bit of the downlink persistent assigned cell to the downlink persistent assigned cell, when the indication bit is set, For example, when the indicator bit is 1, the BS further sets, for each MS, an MS feedback indication bit that the MS needs to feed back. The MS feedback indication bit is used to indicate whether the MS needs feedback acknowledgement information. The BS can determine whether an MS feedback confirmation message is needed according to the current channel condition of the MS. Only when the MS feedback indicates the position bit, for example: 1 , the MS feeds back to the BS the confirmation information about the downlink persistent assignment cell reception condition, otherwise the MS does not need to feed back any information. If the cell feedback indication bit is not set, for example: 0, then the BS does not need to set the MS feedback indication bit in the downlink persistent assignment cell, so all downlink assignments in the downlink persistent assignment cell The MS does not need to feed back any confirmation information to the BS. As long as the BS does not require the MS to provide feedback information for the downlink persistent assigned cells, the BS processes the subsequent processes in accordance with the prior art. Only when the BS instructs the MS to feed back the downlink persistent assigned cells, the MS needs to feed back the downlink persistent assigned cells.

Step S202: The MS feeds back the acknowledgement information to the BS on the ACK channel specified by the BS. If the MS receives the DL-MAP message and the decoding is correct, the MS feeds back the ACK on the ACK channel specified by the BS; if the MS does not receive the DL-MAP message, or receives the DL-MAP message but cannot decode it correctly, the MS does not Feedback any information, this time is equivalent to the MS's error confirmation. Only after the MS feeds back the ACK, the BS continues the subsequent process. If the MS feeds back the NAK, the BS can automatically cancel the previous assignment, and then can choose to resend the downlink persistent assignment to the MS.

Step S203, the MS sends the downlink persistent assigned cell to the corresponding location according to the BS. To receive data sent by the BS.

Step S204, the MS feeds back the confirmation information about the data reception to the BS. This step is optional. If the BS sends the HARQ cell, the MS receives the data sent by the BS and sends an ACK to the BS if the decoding is correct. If the MS decodes the error after receiving the data, the MS sends an error confirmation NAK to the BS, if the MS Without receiving the data sent by the BS, there is no need to feed back any information to the BS.

Step S205, the MS continues to receive the data sent by the BS according to the downlink persistent assigned cell sent by the BS to the corresponding location.

Step S206 is the same as step S204.

The method for feeding back the multicast broadcast assignment information, after the MS correctly receives the downlink multicast broadcast assignment information sent by the BS, sends the ACK acknowledgement information to the BS on the ACK channel designated by the BS, so that the BS can learn the MS for the downlink. Multicast broadcasts the receiving status of the assigned information and performs corresponding processing, which avoids the waste of resources caused by the MS receiving the downlink multicast broadcast assignment information, and improves the resource utilization.

As shown in FIG. 3, which is a flowchart of Embodiment 2 of the present invention, in the case of uplink persistent assignment, the process for the MS to send data by receiving uplink multicast broadcast assignment information includes the following steps:

Step S301: The BS broadcasts the UL-MAP message to the MS, where the UL-MAP message carries the uplink persistent assigned cell, and the cell gives the MS the resource occupation condition: the resource is once in several frames, and the MS is in the whole block. The uplink continues to assign the location in the resource and the size of the occupied resource. In the embodiment of the present invention, an information is added to the uplink persistent assigned cell: an ACK offset, the ACK offset information has two meanings to index the ACK channel of the MS, and the first meaning is that the ACK offset is given by the MS. The offset of the ACK channel that can be occupied by the feedback of the uplink persistent assigned cell in the uplink ACK region, that is, the start position of the ACK channel that the MS can occupy for the feedback of the uplink persistent assigned cell in the entire uplink ACK region. The second meaning is that the ACK offset gives the offset of the ACK channel occupied by the feedback of the MS for the uplink persistent assigned cell in the Fast Feedback region, that is, the MS continuously assigns the cell to the uplink. Feedback occupies the starting position of the ACK channel in the entire Fast Feedback area, and each ACK message will be in a Fast Feedback Sent on the channel. In the uplink persistent assignment, all MSs sequentially obtain their own ACK channel according to the location of their persistent assignment information in the uplink persistent assignment cell. If the MS has multiple persistently allocated resources in an uplink persistent assigned cell, the BS only allocates an ACK channel for feedback acknowledgement information to the MS's first persistent assigned resource, and does not give other persistent assignments to the MS. The resource allocates an ACK channel for feedback confirmation information. There are many methods for adding the ACK location information in the uplink persistent assigned cell. The embodiment of the present invention only uses one of the methods as an example: an ACK offset field is added to the uplink assigned cell, and the length of the field may be It is 8 bits.

Considering that the BS can selectively cause the MS to feed back the reception status of the uplink persistent assigned cell, the BS may add an indication bit of the uplink persistent assigned cell to the uplink persistent assigned cell, when the indication bit is set, For example, when the indicator bit is 1, the BS further sets, for each MS, an MS feedback indication bit that the MS needs to feed back. The MS feedback indication bit is used to indicate whether the MS needs feedback acknowledgement information. The BS can determine whether an MS feedback confirmation message is needed according to the current channel condition of the MS. Only when the MS feedback indicates the position bit, for example: 1 , the MS feeds back to the BS the confirmation information about the uplink persistent assignment cell reception condition, otherwise the MS does not need to feed back any information. If the cell feedback indication bit is not set, for example: 0, then the BS does not need to set the MS feedback indication bit in the uplink persistent assignment cell, so all persistent assignments in the uplink persistent assignment cell The MS does not need to feed back any confirmation information to the BS. As long as the BS does not require the MS to provide feedback information for the uplink persistent assigned cells, the BS processes the subsequent processes in accordance with the prior art. The MS only needs to feed back the persistent assigned cells when the BS instructs the MS to provide feedback on the uplink persistent assignment.

Step S302, the MS feeds back the confirmation information to the BS on the ACK channel designated by the BS. If the MS receives the UL-MAP message and the decoding is correct, the MS feeds back the ACK on the ACK channel specified by the BS; if the MS does not receive the UL-MAP message, or receives the UL-MAP message but cannot decode it correctly, the MS does not Feedback any information, this time is equivalent to the MS's error confirmation. Only after the MS feeds back the ACK, the BS continues the subsequent process. If the MS feeds back the NAK, the BS can automatically cancel the previous assignment, and then can choose to resend the uplink persistent assignment to the MS. Step S303: The MS sends data according to the uplink persistent assigned cell sent by the BS to the corresponding location.

Step S304, the BS sends a DL-MAP message to the MS, where the DL-MAP message carries the downlink HARQ acknowledgement cell. The downlink HARQ acknowledgment cell is used to feed back to the MS the acknowledgment information of the BS regarding the data reception situation. This step is optional. If the BS decides to send the HARQ cell, after receiving the data sent by the MS and correctly decoding, the BS sets the bit position corresponding to the MS in the bitmap of the HARQ cell to 0, indicating that the BS feeds back the correct ACK information to the MS. Otherwise, the bit position corresponding to the MS in the HARQ bitmap is set to 1, indicating that the BS feeds back the error confirmation NAK information to the MS. Of course, the bit position corresponding to the MS in the bitmap of the HARQ cell may be 1 to indicate that the BS feeds back the correct ACK information to the MS; and the bit position corresponding to the MS in the bitmap of the HARQ cell is 0 to indicate the BS direction. The MS feedback error confirms the NAK information, and there are various setting modes, which will not be described here.

Step S305, the MS continues to send data according to the uplink persistent assigned cell sent by the BS to the corresponding location.

Step S306, the same as step S304.

The method for feeding back the multicast broadcast assignment information, after the MS correctly receives the uplink multicast broadcast assignment information sent by the BS, sends the ACK acknowledgement information to the BS on the ACK channel specified by the BS, so that the BS can learn the MS for the uplink. Multicast broadcasts the receiving status of the assigned information, and performs corresponding processing, which avoids the waste of resources caused by the MS receiving the uplink multicast broadcast assignment information, and improves the utilization of resources.

As shown in FIG. 4, which is a flowchart of Embodiment 3 of the present invention, in another embodiment of the present invention, in the case of uplink persistent assignment, another process for the MS to send data by receiving uplink multicast broadcast assignment information includes the following steps. :

Step S401: The BS broadcasts the UL-MAP message to the MS, where the UL-MAP message carries the uplink persistent assignment cell, where the cell gives the MS resource occupation condition: the resource is once in several frames, and the MS continues on the entire uplink. The location in the assigned resource and the size of the resource used.

Step S402: The MS sends the acknowledgement information and the data by using the resource allocated by the uplink persistent assigned cell. If the MS receives the UL-MAP message and can decode it correctly, the MS is based on The uplink persistently transmitted by the BS acquires the resource for transmitting data, and then the MS uses the first piece of time-frequency resources of the resource, for example: one or a half of the slot, to feed back the ACK, and send the data with the remaining resources; If the UL-MAP message is not received, or the UL-MAP message is received but cannot be decoded correctly, the MS does not feed back any information. This time is equivalent to the error confirmation NAK of the MS. Only after the MS feeds back the ACK, the BS continues the subsequent process. If the MS feeds back the NAK, the BS can automatically cancel the previous assignment, and then can choose to resend the uplink persistent assignment to the MS.

Step S403: The BS sends a DL-MAP message to the MS, where the DL-MAP message carries a downlink HARQ acknowledgement cell. The downlink HARQ acknowledgment cell is used to feed back to the MS the acknowledgment information of the BS regarding the data reception situation. This step is optional. If the BS decides to send the HARQ cell, after receiving the data sent by the MS and correctly decoding, the BS sets the bit position corresponding to the MS in the bitmap of the HARQ cell to 0, indicating that the BS feeds back the correct ACK information to the MS. Otherwise, the bit position corresponding to the MS in the HARQ bitmap is set to 1, indicating that the BS feeds back the error confirmation NAK information to the MS. Of course, the bit position corresponding to the MS in the bitmap of the HARQ cell may also be 1 to indicate that the BS feeds back the correct acknowledgement ACK information to the MS; The bit position corresponding to the MS in the bit map of the HARQ cell indicates that the BS feeds back the error confirmation NAK information to the MS. There are also various setting modes, which are not described here.

Step S404, the MS sends data according to the uplink persistent assigned cell sent by the BS to the corresponding location. At this time, the MS no longer selects the first piece of time-frequency resource slot to feed back the confirmation information, and all the allocated resources obtained from the BS are used to transmit data.

Step S405, the same as step S403.

The method for feeding back the multicast broadcast assignment information, after receiving the UL-MAP message sent by the BS, the MS obtains the resource for transmitting data by using the uplink persistent assignment cell in the UL-MAP message, and uses the obtained resource to the BS. At the same time, the acknowledgment information and data about the receiving condition of the uplink persistent assigned cell are sent, so the BS can know whether the MS correctly receives the uplink multicast broadcast assignment information, and performs corresponding processing, thereby avoiding that the MS does not receive the uplink. Multicast broadcasts waste of resources caused by assigned information.

As shown in FIG. 5, which is a structural diagram of Embodiment 4 of the present invention, a feedback system for multicast broadcast assignment information according to an embodiment of the present invention includes a base station BS1 and a mobile terminal MS2. The base station BS1 is configured to send the multicast broadcast assignment information to the MS2, and determine, according to the acknowledgement information fed back by the MS2, that the MS2 correctly receives the multicast broadcast assignment information. The mobile terminal MS2 is configured to receive the multicast broadcast assignment information sent by the BS1, and feed back the acknowledgement information to the BS1.

The BS1 includes an assignment information sending module 11, an acknowledgment information receiving module 12, and a judging module 13. The assignment information sending module 11 is configured to send multicast broadcast assignment information to the MS2. The confirmation information receiving module 12 is configured to receive the confirmation information fed back by the MS2, and the confirmation information indicates that the MS2 correctly receives the multicast broadcast assignment information. The determining module 13 is configured to determine, according to the confirmation information received by the confirmation information receiving module 12, that the MS2 correctly receives the multicast broadcast assignment information.

The BS1 further includes an indication bit adding module 14, an ACK information adding module 15 and an MS feedback indicating bit adding module 16. The indicator bit adding module 14 is configured to add a feedback indicator bit in the multicast broadcast assignment information, and when the feedback indicates the location bit, instruct the MS to send the acknowledgement information at the location specified by the ACK location information. The ACK information adding module 15 is configured to carry the ACK location information in the multicast broadcast assignment information. The MS feedback indication bit adding module 16 is configured to: each MS2 serving the BS1 when the feedback indicates the position bit The MS feedback indication bit is set, and the MS feedback indication bit indicates whether the MS2 needs to feed back the confirmation information to the BS1.

The BS1 further includes a data sending module 17. The data sending module 17 is configured to send data to the MS2 after the determining module 13 determines that the MS2 correctly receives the multicast broadcast assignment information.

The BS1 further includes a data receiving module 18. The data receiving module 18 is configured to: after the determining module 13 determines that the MS2 correctly receives the multicast broadcast assignment information, receive the data sent by the MS2 by using the resource allocated by the uplink multicast broadcast assignment information.

The MS2 includes an assignment information receiving module 21 and an acknowledgement information feedback module 22. The assignment information receiving module 21 is configured to receive the multicast broadcast assignment information sent by the BS1. The acknowledgment information feedback module 22 is configured to: after the receiving information receiving module receives the multicast broadcast assignment information, feed back the acknowledgment information to the BS1, if the MS2 does not receive the multicast broadcast assignment information, or receives the multicast broadcast If the information is assigned but cannot be decoded correctly, then the confirmation information feedback module 22 does not feed back any information, which is equivalent to the error confirmation NAK of the MS.

The MS2 further includes a data receiving module 23. The data receiving module 23 is configured to receive the data sent by the BS1 according to the downlink persistent assigned cell in the multicast broadcast assignment information received by the assignment information receiving module 21 after the acknowledgement information feedback module 22 feeds back the correct acknowledgement information to the BS1.

The MS2 further includes a resource obtaining module 24 and a data sending module 25. The resource obtaining module 24 is configured to obtain, after the acknowledgement information feedback module 22 feeds back the correct acknowledgement information to the BS1, the resource of the transmit data according to the uplink persistent assigned cell in the multicast broadcast assignment information received by the assignment information receiving module 21; The data sending module 25 is configured to send data to the BS1 by using the resource obtained by the resource obtaining module 24.

The feedback system of the above-mentioned assignment information, when receiving the multicast broadcast assignment information correctly, the MS2 feeds back the correct acknowledgement information to the BS1, so that the BS1 knows that the MS2 has correctly received the persistent assignment information in the multicast broadcast assignment information. Yuan, thus continuing the follow-up process. If the BS1 does not receive the acknowledgment information of the MS2 feedback, the BS determines that the MS2 does not correctly receive the persistent assignment cell, and therefore does not continue the subsequent process, and automatically cancels before The assignment of the surface avoids the waste of resources caused by the MS2 receiving the multicast broadcast assignment information and improves the utilization of resources.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by hardware, or can be implemented by means of software plus necessary general hardware platform, and the technical solution of the present invention. It can be embodied in the form of a software product that can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), including a number of instructions for making a computer device (may It is a personal computer, a server, or a network device, etc.) that performs the methods described in various embodiments of the present invention.

In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Rights request

A method for feeding back multicast broadcast assignment information, characterized in that it comprises the following steps:

The base station BS transmits multicast broadcast assignment information to the mobile terminal MS;

The BS determines, according to the acknowledgement information fed back by the MS, that the MS correctly receives the assignment information.

2. The method for feeding back multicast broadcast assignment information according to claim 1, wherein the multicast broadcast assignment information comprises persistent assignment information, and the multicast broadcast assignment information is indicated by multicast broadcast With a message to carry.

The method for feeding back multicast broadcast assignment information according to claim 2, wherein before the BS sends the multicast broadcast assignment information to the MS, the method further includes:

The BS carries an acknowledgement ACK location information in the persistent assignment cell, and the BS specifies, by using the ACK location information, an ACK channel occupied by the MS for feedback of the persistent assignment cell in an ACK region. Starting position.

The BS carries an acknowledgement ACK location information in the persistent assignment cell, and the BS specifies, by using the ACK location information, an ACK channel occupied by the MS for feedback of the persistent assignment cell in a fast feedback region. starting point.

The method for feeding back multicast broadcast assignment information according to claim 3, wherein after the MS correctly receives the multicast broadcast assignment information sent by the BS, according to the persistent assigned cell The carried ACK location information feeds back the acknowledgement information to the BS on the designated ACK channel.

The method for feeding back multicast broadcast assignment information according to claim 2, 3 or 4, wherein before the BS sends the multicast broadcast assignment information to the MS, the method further includes: Adding a feedback indicator bit in the persistent assigned cell;

If the feedback indicates a location bit, the BS carries ACK location information in the persistent assigned cell.

7. The method for feeding back multicast broadcast assignment information according to claim 6, further comprising: if the feedback indicates a location bit, the BS sets MS feedback for each MS served by the BS. An indication bit, the MS feedback indication bit indicating whether the MS needs to feed back confirmation information to the BS.

8. The method for feeding back multicast broadcast assignment information according to claim 2, wherein the multicast broadcast assignment information comprises an uplink persistent assignment cell,

After the BS sends the multicast broadcast assignment information to the MS, the method further includes the following steps: the MS obtains the resource for sending data according to the uplink persistent assignment cell sent by the BS; and sends the data by using the remaining resources in the resource.

A feedback system for multicast broadcast assignment information, comprising: a mobile terminal MS, configured to receive multicast broadcast assignment information, and feed back acknowledgement information; and a base station BS, configured to send more information to the MS Broadcast broadcast assignment information, and according to the

The acknowledgment information fed back by the MS determines that the MS correctly receives the multicast broadcast assignment information.

10. The feedback system for multicast broadcast assignment information according to claim 9, wherein the BS comprises:

An assignment information sending module, configured to send multicast broadcast assignment information to the MS; an acknowledgement information receiving module, configured to receive acknowledgement information fed back by the MS; and a determining module, configured to receive, according to the acknowledgement information receiving module, The confirmation information determines that the MS correctly receives the multicast broadcast assignment information.

11. The feedback system for multicast broadcast assignment information according to claim 10, wherein the MS comprises:

And the information receiving module is configured to receive the multicast broadcast assignment information sent by the BS, and the acknowledgement information feedback module is configured to: after the received information receiving module receives the multicast broadcast assignment information, to the BS Feedback confirmation information.

12. A base station BS, comprising:

An assignment information sending module, configured to send multicast broadcast assignment information to the MS; The acknowledgment information receiving module is configured to receive the acknowledgment information fed back by the MS; and the determining module is configured to determine, according to the acknowledgment information received by the acknowledgment information receiving module, that the MS correctly receives the multicast broadcast assignment information.

13. The BS according to claim 12, further comprising:

An ACK information adding module, configured to carry ACK location information in the multicast broadcast assignment information;

And an indication bit adding module, configured to add a feedback indication bit to the multicast broadcast assignment information, and when the feedback indicates a location bit, instruct the MS to send the acknowledgement information at the location specified by the ACK location information.

The BS according to claim 13, further comprising: an MS feedback indication bit adding module, configured to serve each of the BSs in the multicast broadcast assignment information when the feedback indicates a location bit The MS sets an MS feedback indication bit, and the MS feedback indication bit indicates whether the MS needs to feed back confirmation information to the BS.

A mobile terminal MS, comprising:

The information receiving module is configured to receive the multicast broadcast assignment information sent by the BS, and the acknowledgement information feedback module is configured to feed back the acknowledgement information to the BS.