WO2008046355A1

WO2008046355A1 - Method for receiving multicast broadcast service, system, base station and management equipment thereof

Info

Publication number: WO2008046355A1
Application number: PCT/CN2007/070912
Authority: WO
Inventors: Chengyan Feng; Zhibin Lin
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2006-10-18
Filing date: 2007-10-17
Publication date: 2008-04-24
Also published as: CN101166143B; CN101166143A

Abstract

The present invention discloses a method for receiving a multicast broadcast service, a system, a base station and a management equipment thereof, MBS macro-diversity is realized in the communication system, and MBS reception performance is enhanced. In this invention, a MBS management unit sends physical layer parameters needed for configuring MBS mapping message MBS_MAP to all the MBS execution units in a MBS zone, the MBS execution units configure the MBS_MAP according to the physical layer parameters received, and then send the configured MBS_MAP to MBS reception units, the MBS reception units receive the MBS service according to the MBS_MAP. When the invention is applied in a WiMAX network, the MBS management unit is a MBS agent, the MBS execution unit is a base station, and the MBS reception unit is a terminal.

Description

Multicast broadcast service receiving method, system 1⁄2 station, management device

This application claims priority to Chinese Patent Application No. 200610137047.8, entitled "Receiving Method and System of Multicast Broadcasting Service", filed on October 18, 2006, the entire contents of which are incorporated by reference. In this application.

Technical field

The present invention relates to the field of communications, and in particular, to a multicast broadcast service receiving method and system, a base station, and a management device.

Background technique

Nowadays, with the rapid development of the Internet, people's demand for mobile communication is no longer satisfied with telephone and message services, and a large number of multimedia services emerge. Some of these applications require multiple users to receive the same data at the same time, such as video on demand, TV. Broadcasting, video conferencing, online education, interactive games, etc. Compared with general data, these mobile multimedia services have the characteristics of large data volume, long duration, and delay sensitivity. In order to effectively utilize mobile network resources, and better serve customers, resulting in a multicast broadcast services (Multicast Broadcast Service, referred to as "MBS") ₀

MBS means that the wireless network sends the same information content to multiple (ie multicast) or all (ie broadcast) end users at the air interface. It can realize network resource sharing, improve the utilization rate of network resources, and especially improve the utilization of air interface resources, thereby providing users with high-speed and stable multimedia services with high efficiency.

In a WiMAX network based on the IEEE 802.16e protocol, which is based on the Worldwide Interoperability for Microwave Access (WiMAX) technology, MBS can not only achieve plain text low-rate message-like multicast and broadcast, but also Realizing the multicast and broadcast of high-speed multimedia services, this undoubtedly conforms to the development trend of mobile data services in the future.

MBS based on WiMAX network supports two access modes: single base station access and multiple base station access. In multi-base station access mode, all base stations in an MBS domain (identified by MBS-zone ID) use the same multicast connection identifier (Multicast Connection ID, "MCID") and MBS multicast security. The MBS Group Security Association (MBS GSA) transmits the content of the same MBS stream. The terminal that has registered the MBS service can receive the MBS content through multiple base stations in the MBS domain, that is, the terminal supports macro diversity. And when the terminal in the idle (Idle) mode moves across the base station in the MBS zone, there is no need to re-establish the connection, and the reception can be unaffected. MBS, seamless switching of MBS. A single base station access MBS is a special case of multiple base stations accessing MBS, and the MBS domain range is limited to one base station.

In a WiMAX network, the IEEE 802.16e protocol specifies a Service Flow Identifier ("SFID") to identify a unidirectional service flow. All service flows pass media access control (Medium Access Control). The connection of the MAC") layer is transmitted, that is, the service flow identifier is mapped to a Connection ID ("CID"). At the same time, the IEEE 802.16e protocol specifies the use of a Multicast CID ("MCID") to identify a multicast connection and a Multicast Content Identifier (MBS Contents ID) to identify a multicast content. A Protocol Data Unit ("PDU") transmitted on one MCID contains one or more MBS contents. When an air interface link layer carries multiple contents, it is identified by a logical channel identifier ("LCID") at the link layer to indicate what content is carried in the current link layer. Within a PDU, the LCID uniquely corresponds to a content identifier.

Currently, an MBS mapping (MBS-MAP) message is introduced in IEEE 802.16, and the message is transmitted in the MBS domain to notify physical channel resources allocated for a specific MCID in a given MBS zone. The information elements it contains are shown in Table 1.

Table 1

MBS-MAP (MBS Mapping Message) The message uses the MBS_DATA_IE (MBS Data Indication field) to further specify the modulation and coding mode and power offset (Boosting) used by the corresponding service data block on the specified physical channel resource. The next MBS service The position of the frame and the next MBS-MAP message frame. Therefore, as long as the MBS-MAP message can be correctly detected, the terminal can obtain the physical channel resource of the service data block corresponding to the desired multicast connection according to the message, and further obtain the modulation used on the physical channel resource. The coding mode, the power offset, and the like further determine the location of the MBS frame including the multicast connection in the next frame, thereby performing data reception of the normal multicast connection.

The information elements contained in the MBS DATA IE are shown in Table 2:

Syntax Number of digits Notes (Notes)

( Size )

MBS— DATA— IE {

MBS — MAP Type = 0 2 bits MBS — MAP type = 0

MBS Burst Frame Offset 2 bits Indicates that the Burst positioned by this IE will be in MBS Burst

Appears after Frame Offset+2 frames

Next MBS MAP change indication 1 bit Indicates whether the size of the MBS MAP message of the next MBS frame corresponding to the Multicast CID described herein is changed compared with the MBS MAP.

No.of Multicast CID 3 bits

For (i = 0; i < No.of Multicast CID;

{

Multicast CID 12-bit lower 12 bits in the multicast connection number (12 LSB of CID for multicast)

}

MBS DIUC 4 bit

OFDMA Symbol offset 8 bits relative to the next MBS Burst Frame Offset + 2 frame MBS region start position OFDMA (Orthogonal Frequency Division Multiple Access) symbol offset Subchannel offset 6 bits relative to the next MBS Burst Frame Offset + 2 frame MBS region start position subchannel offset

Boosting 3 bits 000: no enhancement ( normal (not boosted) ); 001:

+6dB; 010: -6dB; 011: +9dB; 100: +3dB; 101: -3dB; 110: -9dB;

111: -12dB;

No. OFDMA Symbols Number of 7-bit OFDMA symbols

No. Subchannels 6 bits number of subchannels

Repetition Coding Indication 2-bit repeat coding indication

0b00 - No repetition coding 0b01 - Repeat 2 times (Repetition coding of 2 used )

OblO - Repeat 4 times (Repetition coding of 4 used )

0b 11 - Repeat 6 times (Repetition coding of 6 used )

Next MBS frame offset 8 bits Next MBS frame offset. The base station will transmit the next one

The Next MBS frame offset value is lower 8 bits of the frame number in which the BS shall transmit the next MBS frame.

Next MBS OFDMA Symbol 8 bits Next MBS OFDMA symbol offset. The offset of the OFDMA symbol in which the next MBS zone starts, measured in OFDMA symbols from the beginning of the downlink frame, the offset of the OFDMA symbol in which the next MBS zone starts, measured in OFDMA symbols from the beginning of the downlink frame In which the MBS-MAP is transmitted. )

If(Next MBS MAP change

Indication=l){

Next MBS No.OFDMA 2 bits indicate the lower symbol corresponding to the Multicast CID included in the IE. It is to indicate the size of MBS - MAP message in Next MBS portion where the BS shall transmitted the next MBS frame For multicast CIDs in this IE )

Next MBS No.OFDMA 6 bits indicate the size of an MBS_MAP message corresponding to the next subchannels of the Multicast CID included in the IE (It is to indicate the size of MBS - MAP message in Next MBS portion where the BS shall transmit the next MBS frame For multicast CIDs in this IE )

Table 2

The MBS-MAP message also contains Extended-MBS-DATA-IE. The difference between the IE and the MBS-DATA-IE is that multiple LCIDs can be included in one MCID, and each LCID corresponds to one MBS content identifier, as shown in Table 3:

table 3

In the prior art, only the flow of receiving the MBS by the base station and the terminal according to the interaction of the MBS-MAP message in the air interface is provided. However, for a scenario where multiple base stations access, if all base stations in an MBS domain are required to implement macro diversity in the air interface, MBS_DATA_IE and Extended_MBS_DATA in each MBS MAP message configured by each base station are required. The service data blocks corresponding to the IE are identical. Currently, the service data blocks corresponding to the MBS-DATA-IE and the Extended-MBS-DATA-IE in each MBS-MAP message configured by each base station are not provided. The specific implementation method.

Summary of the invention The main technical problem to be solved by the embodiments of the present invention is to provide a multicast broadcast service receiving method and system, a base station, and a management device, which implement macro diversity of MBS in the communication system, and enhance the receiving performance of the MBS.

An embodiment of the present invention provides a method for receiving a multicast broadcast service, including the steps of: multicast broadcast service: A management unit of the MBS sends a configuration MBS map to an execution unit of the MBS.

MBS—physical layer parameters required for MAP messages;

The execution unit of the MBS configures the MBS-MAP to process the MBS according to the received physical layer parameters.

An embodiment of the present invention further provides a method for receiving a multicast broadcast service, where the method includes: receiving a multicast broadcast service, and sending, by the MBS proxy, a physical layer parameter required to configure an MBS-map MBS-MAP message;

And configuring the MBS_MAP message according to the physical layer parameter, and instructing the terminal to receive the MBS according to the MBS MAP message.

Correspondingly, an embodiment of the present invention provides a receiving system for a multicast broadcast service, including: a management unit for transmitting an MBS of a physical layer parameter required for configuring an MBS-mapped MBS_MAP message to an execution unit of all MBSs in an MBS domain;

An execution unit for configuring an MBS of the MBS_MAP message according to the received physical layer parameter, the execution unit of the MBS is further configured to send the MBS_MAP message to a receiving unit of the MBS; and

A receiving unit for receiving an MBS according to the MBS_MAP message.

An embodiment of the present invention further provides a base station, including:

a physical layer parameter receiving unit, configured to receive a physical layer parameter required by the MBS proxy to send a configuration MBS mapping message MBS_MAP;

And an MBS configuration unit, configured to configure the MBS_MAP according to the physical layer parameter, and instruct the terminal to receive the MBS according to the MBS_MAP.

The embodiment of the present invention further provides a management device for a multicast broadcast service, including:

a physical layer parameter configuration unit, configured to configure a physical layer parameter required for constructing an MBS-MAP message, and a physical layer parameter sending unit, configured to send the physical layer parameter to a base station in the MBS domain, And instructing the base station to send the MBS_MAP message configured according to the physical layer parameter to the terminal. By comparison, it can be found that the main difference between the technical solution of the present invention and the prior art is that the management unit of the MBS sends the physical layer parameters required for configuring the MBS mapping message MBS_MAP to all the execution units of the MBS in one MBS domain. After the MBS execution unit configures the MBS_MAP according to the received physical layer parameters, the configured MBS_MAP is sent to the receiving unit of the MBS, and the receiving unit of the MBS receives the MBS according to the MBS_MAP. The macro diversity of MBS is implemented in the wireless network, and the reception performance of the MBS is enhanced.

DRAWINGS

1 is a flowchart of configuring a MBS-MAP according to a physical layer parameter sent by a base station according to a management unit of an MBS according to a first embodiment of the present invention;

2 is a flowchart of transmitting an MBS data packet according to related indication information added by a management unit of the MBS according to the second embodiment of the present invention;

3 is a schematic diagram of a management unit package MBS packet of an MBS according to a second embodiment of the present invention;

4 is a schematic diagram of the MBS management unit adding the relevant indication information to the first datagram header according to the second embodiment of the present invention;

5 is a schematic diagram of the MBS management unit adding the relevant indication information to the second datagram header according to the second embodiment of the present invention;

6 is a schematic diagram of adding relevant indication information to a management unit of an MBS according to a third embodiment of the present invention;

7 is a schematic diagram of adding relevant indication information to a management unit of an MBS according to a fourth embodiment of the present invention;

Figure 8 is a diagram showing the addition of relevant indication information by the management unit of the MBS in the fifth embodiment of the present invention.

detailed description

The present invention will be further described in detail below with reference to the drawings and embodiments.

In an embodiment of the present invention, in an MBS domain, the management unit of the MBS sends an MBS data packet to all execution units of the MBS, where the MBS data packet includes a configuration MBS_MAP message. The required physical layer parameters, etc., the execution unit of the MBS configures the MBS-MAP message according to the received physical layer parameters, and sends the configured MBS_MAP message to the receiving unit of the MBS, thereby realizing MBS macro diversity and increasing MBS. Receive performance. The MBS management unit encapsulates the MBS data packet before transmitting the MBS data packet, adds the relevant information of the data packet to the MBS data packet, and sends the MBS data packet carrying the relevant indication information to the execution unit of the MBS. The execution unit of the MBS can use the related indication information to clarify information such as when to send the MBS data packet and the specific location of each MBS data packet in one physical frame. Of course, in the process of encapsulating the MBS data packet by the management unit of the MBS, segmentation and/or packaging may be performed.

A first embodiment of the present invention relates to a method of receiving an MBS. In the present embodiment, the MBS is transmitted over the WiMAX network, the management unit of the MBS is the MBS proxy, the execution unit of the MBS is the base station, and the receiving unit of the MBS is the terminal as an example. The MBS proxy is located in the ASN, or is set on the ASN gateway or is bound to the service flow licensor SFA or exists as a separate function unit.

Specifically, the execution unit of the MBS, that is, the base station, configures the MBS-MAP according to the physical layer parameters sent by the MBS agent, that is, the management unit of the MBS, as shown in FIG.

In step 110, the MBS proxy configures physical layer parameters required for constructing the MBS-MAP message, and carries the physical layer parameters in the MBS data packet and sends them to the base stations in the MBS domain. The MBS proxy is a central node of the MBS located in the ASN domain, and may be located on an Access Service Network Gate Way ("ASN GW") or bound to an SFA (Service Flow Authorizer) or as a separate network. The MBS proxy contains both the user plane and the control plane; it is responsible for the synchronization of services within an MBS domain. That is, in an MBS domain, the MBS proxy has a synchronized time reference with all base stations, and the time reference may be one of a frame number, an absolute time, and a global positioning system GPS time, or any combination thereof, or Other equivalent information that is mutually converted to ensure that the base station configures the correctness and uniformity of the MBS-MAP according to the received physical layer parameters.

The physical layer parameters configured by the MBS proxy may include one of the following information or any combination thereof: (1) The downlink interval uses the definition of the code DIUC, that is, the MBS proxy defines that all base stations in an MBS domain will be used for the MBS service. DIUC and its corresponding burst configuration service data block profile (parameter set describing the downlink or uplink transmission characteristics, and interval code Interval) Usage Code association. Each configuration contains parameters such as modulation type, forward error correction type, preamble length, guard time, and so on. The definition of the DIUC can be uniformly configured once before performing the MBS service, and is re-issued until the DIUC of the MBS or its corresponding service data block needs to be changed.

Since a base station may belong to multiple MBS domains, the definition of DIUC may be uniformly defined within an ASN.

(2) MBS—The timestamp and period of the first transmission of the MAP message, or the time at which the base station needs to send the corresponding MBS-MAP message. The timestamp and the sending time are one of a frame number, an absolute time, and a GPS time of the GPS, or any combination thereof, or other equivalent information that can be interchanged with the above information. The former configuration parameter corresponds to the case where the base station periodically transmits the MBS_MAP message, and the composition of the MBS_MAP message remains unchanged for a period of time. When a change is needed, the MBS proxy resends the new MBS-MAP indication message to the base station. The latter configuration corresponds to the case where each MBS-MAP message sent by the base station is sent by the MBS proxy to deliver the indication message. These parameters can be configured by the MBS agent based on the start time of the multicast service received from the MBS server (MBS Sever) or the content provider.

The first transmission time of the MBS-MAP message may be the frame number Frame number (if the frame numbers of all base stations in one MBS domain are synchronized), or the time parameter. Moreover, the frame period of the MBS-MAP message can be indicated by the base station by the frame offset period of the MBS-MAP message.

(3) the location indication information of the MBS_MAP message, such as by including at least one of an OFDMA symbol offset, an OFDMA subchannel offset, an OFDMA symbol number, an OFDMA subchannel number, and the like, to indicate the MBS_MAP message. Location indication information.

(4) Each MBS-DATA-IE describes a service data block containing a list of MCIDs and a list of LCIDs included in each MCID (if there is more than one MBS content in a PDU). The LCID is allocated by the MBS proxy according to the MBS content identifier (Contents ID), and the two are one-to-one mapping relationship. An LCID can be unique on an MCID, either on the MBS proxy or unique within an MBS domain.

(5) The MBS DIUC used by the business data block described by each MBS_DATA_IE. (6) The timestamp of the first transmission of the service data block described by each MBS_DATA-IE and the period of each subsequent transmission of the service data block, or the transmission time of the corresponding service data block. These parameters can be configured by the MBS proxy based on the obtained multicast service start time. Where time The stamp and the transmission time are one or any combination of the frame number, the absolute time, and the GPS time of the GPS, or other equivalent information that can be mutually converted with the above information.

(7) position indication information of the service data block described by each MBS_DATA_IE, such as by including at least one of an OFDMA symbol offset, an OFDMA subchannel offset, an OFDMA symbol number, an OFDMA subchannel number, and the like, To indicate location indication information of the service data block.

(8) The power (Bosting) and Repetition Coding Indication of the service data block described by each MBS-DATA-IE.

(9) The PDU size limit of the service data block described by each MBS-DATA-IE.

(10) Each MBS-DATA-IE describes the packet segmentation rule of the service data block: used to indicate how the physical layer of each base station performs packing/segmentation. The packing segmentation rule may be: prohibiting packaging and segmentation; or allowing packaging, prohibiting segmentation; or allowing segmentation, prohibiting packaging; or allowing packaging and segmentation.

(11) MBS—DATA— IE serial number.

(12) PDU serial number.

The various information contained in the physical layer parameters provides the basis for the MBS execution unit to configure MBS-MAP.

Next, the MBS proxy sends the configured physical layer parameters to all base stations in the same MBS domain, as in steps 120 and 120'. The MBS proxy can send the physical layer parameters to the base station through the MBS service flow setup message, or can be delivered by using a separate message bearer.

Then, the base station that receives the physical layer parameter may return an acknowledgement message to the MBS proxy whether the physical layer parameter is received, and the MBS proxy may adjust the MBS-MAP message and/or the service data block specified in the physical layer parameter according to the acknowledgement information. The sending time, this step is an optional step, such as step 130 and step 130' (shown by the dotted line in the figure).

Then, all the base stations that receive the physical layer parameters configure the MBS-MAP message according to the physical layer parameter, and send the configured MBS-MAP message to the receiving unit of the MBS through the air interface at a specified time, as in step 140 and step 140. '.

It should be noted that the MBS proxy does not have to issue physical layer parameter indications for each MBS frame. After the first delivery of the indication, the physical layer parameters of the configured MBS data need to be re-issued. Otherwise, the base station can perform multicast according to the latest received physical layer parameter indication. Configuration to reduce unnecessary signaling interactions in the network and save system resources.

Then, the terminal receives the MBS according to the received MBS_MAP message. The MBS macro diversity is implemented in the WiMAX network, which enhances the reception performance of the MBS.

A second embodiment of the present invention relates to a method of receiving an MBS. On the basis of the first embodiment, after receiving the MBS data packet, the MBS proxy directly adds the relevant indication information of the data packet to the MBS data packet, and sends the related information to the base station, and the base station sends the MBS data according to the relevant indication information. The process of the package.

Specifically, as shown in FIG. 2, in step 210, the MBS agent located in the ASN configures the MBS packet and adds relevant indication information. The configuration of the MBS data packet may be: directly adding relevant indication information to the received MBS data packet; or encapsulating the received multicast data packet into a Payload (net load) form of a MAC PDU, Or packaged into a form of MAC PDU, or directly packaged into a business data block form composed of multiple MAC PDUs, and then add relevant indication information. In this embodiment, the MBS proxy directly adds the relevant indication information to the received MBS data packet, such as a frame number or time information, so that the base station can know when the data packet is received after receiving the MBS data packet. Send it.

In this embodiment, the MBS management unit (such as the MBS proxy) encapsulates the MBS data packet as shown in FIG. 3, and includes: a data packet header and a multicast data packet area; and the MBS proxy receives the MBS data. The packet is encapsulated, and the relevant indication information of the MBS data packet may be added to the first datagram header, as shown in FIG. 4, or may be added after the second datagram header, as shown in FIG. 5.

The related indication information parameter added may include one of the following parameters or any combination thereof:

(1) The length of the related indication information added. If the related indication information added is a fixed length, this field can be omitted.

(2) A timestamp indicating when the MBS packet is to be sent, such as a frame number or a time value. (3) Indicates the serial number of the MBS packet (optional). The default value of the packet serial number can be

"0" starts numbering, and each time an MBS packet is sent (based on the same multicast IP address and port number), the value is 1.

(4) The MBS_DATA_IE sequence number (optional) is used to indicate which MBS_DATA_IE describes the service data block to which the multicast service data block belongs. (5) The PDU sequence number (optional) is used to indicate which MBS data packet needs to be placed on the corresponding PDU.

(6) Offset (optional). In case the relevant indication information contains the PDU sequence number, the offset can be used for the location of the MBS packet at the PDU. For example, the start of the load of the PDU is an offset value, or the start of the MAC header of the PDU, and the unit is a bit or a byte.

It can be seen that the base station can specify information about when to send the MBS data packet and the specific location of each MBS data packet in one physical frame through the relevant indication information of the MBS data packet. It is guaranteed that when a packet loss occurs at the base station, the base station can also put each MBS data packet in the correct location, and the packet loss is empty. Because of the macro diversity effect, the terminal can recover the frame by combining the air interface MBS packets sent by multiple base stations.

The MBS proxy sends the MBS packet carrying the relevant indication information to all base stations in the same MBS domain, as in step 220 and step 220'.

All the base stations that have received the MBS data packet encapsulate the MBS data packet, place the data packet at a specified location of the specified physical frame according to the relevant indication information in the data packet, and send the data packet to the terminal through the air interface at the corresponding time. , as in step 230 and step 230'.

It should be noted that the execution unit of the MBS may also send an acknowledgement message to the MBS proxy for indicating whether the data is synchronized, so that the MBS proxy can adjust the transmission timing of the MBS data according to the acknowledgement message.

The terminal receives the MBS according to the received relevant indication information. It enables MBS macro diversity in WiMAX networks and enhances MBS reception performance.

A third embodiment of the present invention relates to a method of receiving an MBS. This embodiment is substantially the same as the implementation principle of the second embodiment, except that in the second embodiment, the MBS proxy directly adds the relevant indication information to the received MBS data packet, but in the present embodiment, the MBS is used. The proxy encapsulates the received MBS data packet into the form of the Payload of the MAC PDU, and then adds related indication information as an example, as shown in FIG. 6.

The related indication information parameter may include one of the following parameters or any combination thereof: (1) The length of the related indication information added, if the related indication information added is a fixed length, the field may be omitted.

(2) A timestamp indicating when the MBS packet is to be sent, such as a frame number or a time value. (3) Indicates the serial number of the MBS packet (optional). The default value of the packet sequence number can be numbered starting from "0". For each MBS packet sent (based on the same multicast IP address and port number), the value is 1.

(4) The MBS_DATA_IE sequence number (optional) is used to indicate which MBS_DATA_ IE describes the service data block to which the multicast service data block belongs.

(5) The correspondence between the MBS packet and the MCID (optional) is used to indicate to which MCID the MBS packet is to be transmitted. The added indication can be: MCID, or the corresponding PDU sequence number, etc.

A fourth embodiment of the present invention relates to a method of receiving an MBS. This embodiment is substantially the same as the third embodiment except that in the third embodiment, the MBS proxy encapsulates the received MBS data packet into a Payload form of the MAC PDU, and then adds related indication information, and In this embodiment, the MBS proxy encapsulates the received MBS data packet into a form of a MAC PDU, and then adds related indication information, as shown in FIG. 7. The related indication information added is the same as the third embodiment, and is not mentioned here.

A fifth embodiment of the present invention relates to a method of receiving an MBS. The present embodiment is substantially the same as the fourth embodiment except that in the fourth embodiment, the MBS proxy encapsulates the received MBS data packet into a form of a MAC PDU, and then adds related indication information, but in this implementation. In the mode, the MBS proxy encapsulates the received MBS data packet into a form of multiple MAC PDUs, that is, the form of the service data block described by the MBS-MAP-IE in the MBS-MAP message, and then adds related indication information, as shown in FIG. 8. Shown.

(2) A timestamp indicating when the MBS packet is to be sent, such as a frame number or a time value. (3) The MBS_DATA_IE sequence number (optional) is used to indicate which MBS_DATA_IE is the service data block to which the multicast service data block belongs.

If the added indication information parameter has an MBS_DATA_IE sequence number, and the MBS proxy also has the parameter in the physical layer parameter sent by the base station, the base station can learn from the relevant indication information which MBS_DATA is this. – the service data block corresponding to the IE, without resolving the service data block The specific information is gone.

In addition, a sixth embodiment of the present invention relates to a receiving system of an MBS, including:

Used to send configuration MBS mapping messages to all MBS execution units in one MBS domain

MBS - the management unit of the MBS of the physical layer parameters required by the MAP; the execution unit of the MBS for configuring the MBS_MAP message according to the received physical layer parameters, the execution unit of the MBS is also used to

The receiving unit that the MBS MAP sends to the MBS; and the receiving unit of the MBS that receives the MBS service according to the MBS MAP. Thus, the macro diversity of MBS is realized in the network, and the receiving performance of the MBS is enhanced.

The management unit of the MBS has a synchronized time reference with the execution unit of the MBS, such as frame number, absolute time, or GPS time of the global positioning system, or other equivalent information that can be mutually converted with the above information, to ensure that the base station according to the received physical Layer parameters configure the correctness and uniformity of MBS-MAP.

In the WiMAX network, the management unit of the MBS is the MBS proxy, the execution unit of the MBS is the base station, and the receiving unit of the MBS is the terminal. The MBS proxy is located in the ASN, or is set on the ASN gateway or is bound to the service flow licensor SFA or exists as a separate functional unit. That is, the MBS proxy sends the physical layer parameters required to configure the MBS-MAP to all base stations in the same MBS domain, and the physical layer parameters may include one of the following information or any combination thereof:

The downlink interval uses the definition of the code DIUC, the first transmission timestamp and period of the base station transmitting the MBS_MAP message and the service data block, or the time when the base station transmits the corresponding MBS_MAP and the service data block, the MBS_MAP and the service data block. Position indication information, MBS DIUC used by each "MBS-DATA-IE" description block, power and repetition coding indication of the service data block, PDU size limitation of the service data block, and packing segmentation of the service data block Rules, "MBS-DATA-IE" serial number, PDU serial number, etc.

Preferably, the MBS proxy is further configured to add the related indication information of the data packet to the MBS data packet, and send the MBS data packet carrying the relevant indication information to the base station, where the base station sends the MBS data packet according to the related indication information. The related indication information includes one of the following parameters or any combination thereof: the length of the related indication information, the timestamp of the MBS data packet, the serial number of the MBS data packet, The "MBS_DATA_IE" sequence number, the PDU sequence number, the offset indicating the MBS packet at the PDU location, the correspondence between the MBS packet and the MCID.

In addition, a seventh embodiment of the present invention further provides a method for receiving a multicast broadcast service, where the method includes the following steps:

Receiving multicast broadcast service MBS proxy send configuration MBS mapping MBS - physical layer parameters required for MAP messages;

Configuring the MBS_MAP message according to the physical layer parameter, and instructing the terminal according to the

The MBS MAP message receives MBS.

That is, after receiving the physical layer parameter required by the MBS proxy to configure the MBS mapping message MBS_MAP, the base station configures the MBS_MAP according to the physical layer parameter;

The MBS_MAP is sent to the terminal, and the terminal receives the MBS according to the MBS_MAP. The specific implementation process is detailed in the above method, and will not be described here.

In this embodiment, the parameters included in the physical layer parameters are as described above, and the preferred method is not mentioned herein. The method may further include: receiving, by the base station, related indication information, which is sent by the MBS proxy, for sending the MBS data packet. And sending the MBS data packet according to the related indication information.

The parameters included in the indication information are as described above, and are not mentioned here.

Preferably, the method may further include the step of: the MBS proxy feeding back an acknowledgement message indicating whether the data is synchronized, so that the MBS proxy can adjust the sending timing of the MBS data according to the acknowledgement message.

An eighth embodiment of the present invention further provides a method for receiving a multicast broadcast service, where the method includes the following steps:

Configure the physical layer parameters required to construct the MBS-MAP message;

Sending the physical layer parameter to the base station in the MBS domain, and instructing the base station to send the MBS_MAP message configured according to the physical layer parameter to the terminal; Receiving a confirmation message fed back by the base station.

That is, the MBS proxy first configures physical layer parameters required for constructing the MBS-MAP message, and then transmits the physical parameters to the base station, and the base station configures the MBS_MAP message according to the physical layer parameters, and configures the configuration. The MBS_MAP message is sent to the terminal; the terminal receives the MBS according to the received MBS-MAP message. For details of the implementation process, refer to the foregoing implementation manner, and details are not described herein again.

It should be noted that, after the physical layer parameter is sent to the base station for the first time, the MBS proxy sends a new physical layer parameter to the base station only when the physical layer parameter of the configured MBS data changes.

Preferably, the method may further include the following steps: the MBS proxy adds the relevant indication information of the data packet to the MBS data packet, and sends the MBS data packet carrying the relevant indication information to the base station, where The relevant indication information is sent to the MBS data packet.

And the MBS proxy adds the related indication information to the MBS data packet by using one of the following manners: directly adding the related indication information to the received MBS data packet;

The received MBS data packet is packaged into a payload form of a medium access layer MAC PDU, a form of a media access layer MAC PDU or a service data block composed of a MAC PDU, and then added to the packaged MBS data packet. The related indication information.

The parameters included in the related indication information are as described above, and are not described herein again. :

A ninth embodiment of the present invention further provides a base station, including: a physical layer parameter receiving unit and an MBS configuration unit. The physical layer parameter receiving unit is configured to receive a physical layer parameter required for the MBS proxy to send an MBS-mapped MBS-MAP message, where the MBS configuration unit is configured to configure the MBS-MAP according to the physical layer parameter. And instructing the terminal to receive the MBS according to the MBS_MAP message.

Preferably, the MBS proxy is located in the access service network ASN, or is set on the ASN gateway, or is bound to the service flow licensor SFA, or exists as an independent network element.

Preferably, the device further includes: an indication information receiving unit and an MBS sending unit. The indication information receiving unit is configured to receive related indication information for sending an MBS data packet, where the MBS sending unit is configured to send the MBS data packet according to the related indication information.

The tenth embodiment of the present invention further provides a management device for a multicast broadcast service, including: a physical layer Parameter configuration unit, physical layer parameter sending unit. Further, the acknowledgment message receiving unit may be further included, where the physical layer parameter configuration unit is configured to configure physical layer parameters required for constructing the MBS-MAP message, and the physical layer parameter sending unit is configured to use the physical layer parameter Sending to the base station in the MBS domain, and instructing the base station to send the MBS_MAP message configured according to the physical layer parameter to the terminal; the acknowledgement message receiving unit is configured to receive the acknowledgement message fed back by the MBS execution unit.

Preferably, the device further includes: an indication information adding unit and an indication information sending unit. The indication information adding unit is configured to add the related indication information of the data packet to the MBS data packet, where the indication information sending unit is configured to send the MBS data packet that carries the related indication information to the base station, to indicate the base station according to the The related indication information is sent to the MBS data packet.

Preferably, the management device of the MBS is integrated in the MBS proxy.

It can be seen from the foregoing embodiment that the management unit of the MBS sends the physical layer parameters required for configuring the MBS mapping message MBS_MAP to all the execution units of the MBS in one MBS domain, and the execution unit of the MBS configures the MBS according to the received physical layer parameters— After the MAP, the configured MBS_MAP is sent to the receiving unit of the MBS, and the receiving unit of the MBS receives the MBS according to the MBS_MAP. MBS macro diversity is implemented in the wireless network, which enhances the reception performance of MBS.

Preferably, when the embodiment of the present invention is applied to a WiMAX network, the management unit of the MBS is an MBS proxy, the execution unit of the MBS is a base station, and the receiving unit of the MBS is a terminal. The MBS proxy is located in the Access Service Network (ASN), or is placed on the ASN gateway or bound to the service flow licensor SFA or as a separate functional unit.

After the MBS management unit sends the physical layer parameters to the execution unit of the MBS for the first time, the physical layer parameters of the configured MBS data may be changed, and then the new physical layer parameters are sent to the execution unit of the MBS to reduce the physical layer parameters. Unnecessary signaling interactions in the network save system resources.

The various information contained in the physical layer parameters provides the basis for the MBS execution unit to configure MBS-MAP. The MBS management unit has a synchronized time reference with the execution unit of the MBS, which ensures the correctness and uniformity of the MBS execution unit configuration MBS-MAP.

The management unit of the MBS adds the relevant indication information of the data packet to the MBS data packet, and sends the MBS data packet carrying the relevant indication information to the execution unit of the MBS. The execution unit of the MBS can use the related indication information to specify information such as when to send the MBS data packet and the specific location of each MBS data packet in one physical frame. Guaranteed the loss of the execution unit at the MBS When the packet is used, the MBS execution unit can also put each MBS packet in the correct location, and the packet loss is empty. Due to the macro diversity effect, the receiving unit of the MBS can recover the frame by combining the air interface MBS data packets sent by the execution units of the plurality of MBS.

The MBS management unit can add related indication information to the MBS data packet in different manners according to the complexity, and provides various implementation manners for the solution of the present invention.

Although the invention has been illustrated and described with reference to the preferred embodiments of the present invention, it will be understood The spirit and scope of the invention.

Claims

Rights request

A method for receiving a multicast broadcast service, comprising:

The multicast broadcast service MBS management unit sends the physical layer parameters required to configure the MBS mapping MBS-MAP message to all MBS execution units in the MBS domain;

The method for receiving a multicast broadcast service according to claim 1, wherein the MBS is transmitted through a microwave access global interworking network; the management unit of the MBS is integrated in an MBS proxy; and the MBS is executed. The unit is integrated in the base station; the receiving unit of the MBS is integrated in the terminal;

The MBS proxy is located in the access service network ASN, or is set on the ASN gateway, or is bound to the service flow licensor SFA, or exists as an independent network element.

The method for receiving a multicast broadcast service according to claim 1, wherein the management unit of the MBS and the execution unit of the MBS have synchronized time references.

The method for receiving a multicast broadcast service according to claim 3, wherein the time reference comprises one or any combination of the following: a frame number, an absolute time, and a global positioning system GPS time.

The method for receiving a multicast broadcast service according to claim 1, wherein the management unit of the MBS is configured only after transmitting the physical layer parameter to the execution unit of the MBS for the first time. When the physical layer parameter of the MBS data changes, a new physical layer parameter is sent to the execution unit of the MBS.

The method for receiving a multicast broadcast service according to any one of claims 1 to 5, wherein the physical layer parameter comprises one of the following or any combination thereof:

The downlink interval uses the definition of the code DIUC; the execution unit of the MBS transmits the first transmission timestamp and period of the MBS_MAP message and the service data block composed of the protocol data unit PDU; the execution unit of the MBS transmits the corresponding MBS_MAP And the time of the service data block; MBS_MAP and location indication information of the service data block; each of the "MBS_DATA-IE" service data block includes a multicast connection identifier MCID list and each MCID includes Logical channel identification LCID column a MBS DIUC used by the service data block; a power and a repetition coding indication of the service data block; a PDU size limitation of the service data block; a packetization segmentation rule of the service data block; "MBS_DATA- IE "serial number; PDU serial number.

The method for receiving a multicast broadcast service according to claim 6, wherein the time stamp and the time for transmitting the corresponding MBS_MAP and the service data block are frame number, absolute time, and global positioning system GPS One or a combination of times;

The MBS_MAP and the location indication information of the data block include one or any combination of the following: orthogonal frequency division multiple access access OFDMA symbol offset, OFDMA subchannel offset, OFDMA symbol number, and OFDMA subchannel Number

The packing segmentation rule of the data block is to allow packing and/or segmentation.

The method for receiving a multicast broadcast service according to any one of claims 1 to 5, wherein the method further comprises the steps of:

The management unit of the MBS adds the relevant indication information of the data packet to the MBS data packet, and sends the MBS data packet carrying the relevant indication information to the execution unit of the MBS;

The execution unit of the MBS transmits the MBS data packet according to the related indication information.

The method for receiving a multicast broadcast service according to claim 8, wherein the management unit of the MBS adds the related indication information to the MBS data packet by one of the following methods: The package directly adds the related indication information;

The method for receiving a multicast broadcast service according to claim 8, wherein the related indication information comprises one of the following or any combination thereof:

Length of related indication information, timestamp of MBS packet transmission, serial number of MBS packet, "MBS_DATA_IE" serial number, PDU sequence number, offset for indicating MBS packet at PDU position, MBS data The correspondence between the package and the MCID.

The method for receiving a multicast broadcast service according to claim 8, wherein the method further comprises the steps of:

The execution unit of the MBS sends a notification to the management unit of the MBS to indicate whether the data is the same Step confirmation message;

The management unit of the MBS adjusts the MBS data transmission time according to the confirmation message.

12. A method for receiving a multicast broadcast service, comprising the steps of:

The method for receiving a multicast broadcast service according to claim 12, wherein the physical layer parameter comprises one or any combination of the following:

The downlink interval uses the definition of the code DIUC; the execution unit of the MBS transmits the first transmission timestamp and period of the MBS_MAP and the service data block composed of the protocol data unit PDU; the execution unit of the MBS transmits the corresponding MBS_MAP and The time of the service data block; the MBS_MAP and the location indication information of the service data block; the service data block described by each "MBS-DATA-IE" includes a multicast connection identifier MCID list and each MCID included a logical channel identifier LCID list; an MBS DIUC used by the service data block; a power and a repetition coding indication of the service data block; a PDU size limit of the service data block; and a packetization segmentation rule of the service data block; MBS—DATA—IE” serial number; PDU serial number.

The method for receiving a multicast broadcast service according to claim 13, wherein the timestamp and a time for transmitting a corresponding MBS_MAP message and the service data block are a frame number, an absolute time, and a global positioning system. One or any combination of GPS times;

The MBS_MAP message and the location indication information of the data block include one or any combination of the following: orthogonal frequency division multiple access (OFDMA) symbol offset, OFDMA subchannel offset, OFDMA symbol number, and OFDMA sub- Number of channels;

The method for receiving a multicast broadcast service according to claim 12, wherein the method further comprises:

Receiving relevant indication information sent by the MBS proxy for transmitting the MBS data packet; and transmitting the MBS data packet according to the related indication information.

16. The method for receiving a multicast broadcast service according to claim 15, wherein: The indication information includes one of the following or any combination thereof:

The method for receiving a multicast broadcast service according to claim 15, wherein the method further comprises the step of: the MBS proxy feeding back an acknowledgement message indicating whether the data is synchronized.

A receiving system for a multicast broadcast service, comprising:

A management unit for the MBS that configures the physical layer parameters required to configure the MBS-mapped MBS-MAP message to all MBS execution units within the MBS domain;

And an execution unit of the MBS configured to configure the MBS_MAP message according to the received physical layer parameter, where the execution unit of the MBS is further configured to send the MBS_MAP message to the receiving unit of the MBS;

A receiving unit for receiving an MBS of the MBS according to the MBS_MAP message.

The receiving system of the multicast broadcast service according to claim 18, wherein the management unit of the MBS is integrated in an MBS proxy; the execution unit of the MBS is integrated in a base station; and the receiving unit of the MBS Integrated in the terminal;

The MBS proxy is located in the access service network ASN, or is disposed on the ASN gateway, or is bound to the service flow licensor SFA, or exists as an independent functional unit.

20. The receiving system of the multicast broadcast service according to claim 19, wherein the management unit of the MBS has a synchronized time reference with the execution unit of the MBS;

The time reference is frame number, absolute time, or global positioning system GPS time.

The receiving system of the multicast broadcast service according to any one of claims 18 to 20, wherein the management unit of the MBS is further configured to add related indication information of the data packet to the MBS data packet, and Transmitting an MBS data packet carrying the relevant indication information to an execution unit of the MBS;

The execution unit of the MBS is further configured to send the MBS data packet according to the related indication information.

22. A base station, comprising:

Physical layer parameter receiving unit for receiving MBS proxy transmission configuration MBS mapping MBS_MAP The physical layer parameters required for the message;

And an MBS configuration unit, configured to configure the MBS_MAP message according to the physical layer parameter, and instruct the terminal to receive the MBS according to the MBS_MAP.

The base station according to claim 22, wherein the base station further comprises: an indication information receiving unit, configured to receive related indication information used to send an MBS data packet;

And an MBS sending unit, configured to send the MBS data packet according to the related indication information.

24. A management device for a multicast broadcast service, comprising:

a physical layer parameter configuration unit, configured to configure a physical layer parameter required to construct an MBS-MAP message, and a physical layer parameter sending unit, configured to send the physical layer parameter to a base station in the MBS domain, and instruct the base station to perform parameters according to the physical layer The configured MBS-MAP message is sent to the terminal.

The management device of the multicast broadcast service according to claim 24, wherein the device further comprises:

The confirmation message receiving unit is configured to receive a confirmation message fed back by the MBS execution unit.

The management device of the multicast broadcast service according to claim 24 or 25, wherein the device further comprises:

The indication information adding unit is configured to add the related indication information of the data packet to the MBS data packet, and the indication information sending unit is configured to send the MBS data packet that carries the relevant indication information to the base station, to indicate the base station according to the related indication information. Send the MBS packet.

The management device of the multicast broadcast service according to claim 24, wherein the management device of the MBS is integrated in the MBS proxy.