WO2009026845A1

WO2009026845A1 - Method for data transmitting and receiving, wireless access point apparatus, gateway and communication system

Info

Publication number: WO2009026845A1
Application number: PCT/CN2008/072117
Authority: WO
Inventors: Zhichang Lai
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2007-08-23
Filing date: 2008-08-22
Publication date: 2009-03-05
Also published as: CN101374266A

Abstract

A method for data transmitting and receiving, a wireless access point apparatus, a gateway and a communication system are provided. The method for data transmitting and receiving includes steps as follows: adding a corresponding traffic stream identifier before a message which includes a message header and a message payload, wherein the message is circuit-switched field traffic data transmitted between the wireless access point and the access gateway, with the traffic stream identifier identifying the user the message belongs to and the length of the message; assembling at least two sets of the message payload, the message header and the corresponding traffic stream identifier into a Real-Time Transport Protocol (RTP) data packet payload or a User Datagram Protocol (UDP) data packet payload; sending the assembled RTP data packet or UDP data packet. With the method for data transmitting and receiving, the wireless access point apparatus, the gateway and the communication system, the efficiency of transmitting circuit-switched field traffic data can be improved.

Description

Data transmitting and receiving method and wireless access point device, gateway, communication system

The present invention relates to the field of communications, and in particular, to a data transmission and reception method, a wireless access point device, a gateway, and a communication system. Background technique

The Universal Mobile Telecommunications System (UMTS) is a third-generation mobile communication system that uses Wideband Code Division Multiple Access (WCDMA) air interface technology.

The UMTS includes a UMTS Terrestrial Radio Access Network ("UTRAN") and a Core Network ("CN"). The UTRAN is used to handle all wireless related functions, and the CN handles all voice calls and data connections in the UMTS system and implements switching and routing functions with the external network.

UTRAN contains one or several Radio Network Subsystems ("RNS"). An RNS consists of a Radio Network Controller (RNC) and one or more base stations (Node B). The interface between the RNC and the CN is the Iu interface. The interface between the Node B and the RNC is the Iub interface. After the network is flattened, the functions of the RNC and the Node B are integrated. Within the UTRAN, the RNCs are interconnected by lur, and the lur can be connected through a direct physical connection between the RNCs or through a transport network. The RNC is used to allocate and control the radio resources of the Node B connected or related to it. The Node B completes the data stream conversion between the Iub interface and the Uu interface, and also participates in some radio resource management.

In carrying out the creation process of the present invention, the inventors have found that at least the following problems exist in the above-mentioned existing use of the UTRAN system for transmitting, transmitting, and receiving data:

When the service data passes through the ADSL modem to the DSLAM link segment, there are more protocol stacks, that is, the protocol layer. More use, that is, the transmission efficiency is lower. Summary of the invention

The technical problem to be solved by the embodiments of the present invention is to provide a data transmitting and receiving method, a wireless access point device, a gateway, and a communication system, which can improve the efficiency of data transmission in a circuit switched domain.

Providing a data sending method, including:

Step A1: Add a corresponding service flow identifier to the packet header and the packet payload of the circuit switched domain service data transmitted between the wireless access point and the access gateway, and mark the user and the packet to which the packet belongs. length;

Step B1: multiplexing at least two of the packet payload, the packet header, and the corresponding service flow identifier, as a payload of the real-time transport protocol data packet or as a payload of the user data packet protocol data packet;

Step C1: Send the multiplexed real-time transport protocol data packet or user data packet protocol data packet.

Providing a data receiving method, including:

Step A2: receiving a circuit switched domain service user data packet that is transmitted between the wireless access point and the access gateway and multiplexed by a real-time transport protocol or a user data packet protocol;

Step B2: parsing the multiplexed data from the data packet;

Step C2: Demultiplexing the service flow identifier and the packet header of each user data from the multiplexed data, where the service flow identifier marks the length of the user to which the packet belongs and the length of the packet;

Step D2: Obtain a packet payload corresponding to the length of the user and the packet according to the service flow identifier.

Providing a wireless access point device, comprising:

a first marking unit, configured to increase the header of the service data of the circuit switched domain and the payload of the message Add a corresponding service flow identifier, and mark the length of the user to which the packet belongs and the length of the packet;

a first multiplexing unit, configured to multiplex the message payload of the at least two users, the packet header, and the respective service flow identifiers added by the first marking unit, as a real-time transport protocol data packet or user The payload of the datagram protocol packet;

And a first sending unit, configured to send the real-time transport protocol data packet or the user data packet protocol data packet output by the first multiplexing unit.

Providing an access gateway, including:

a selecting unit, configured to select a circuit switched domain service data packet whose destination address is a different receiving user of the same wireless access point;

a second marking unit, configured to add a corresponding service flow identifier to the packet header and the packet payload of the data packet selected by the selecting unit, and mark the length of the user to which the packet belongs and the length of the packet; a multiplexing unit, configured to multiplex the message payload of the at least two users, the packet header, and the respective service flow identifiers added by the second marking unit, as a real-time transport protocol data packet or a user data packet The payload of the protocol packet;

And a second sending unit, configured to send a real-time transport protocol data packet or a user data packet protocol data packet output by the second multiplexing unit.

A communication system is provided that can include the wireless access point and access gateway described above. DRAWINGS

1 is a schematic structural diagram of a UTRAN according to an embodiment of the present invention;

2 is a schematic structural diagram of an ADSL network according to an embodiment of the present invention;

3 is a structural diagram of a related network element protocol stack in the ADSL network in FIG. 2;

4a is a flow chart of one of the second embodiments of the data transmitting method of the present invention;

4b is a flowchart of the second embodiment of the second embodiment of the data transmission method of the present invention;

FIG. 5a is a schematic diagram of a structure of a service flow identifier in an embodiment of the present invention; FIG. FIG. 5b is a schematic diagram showing the structure 2 of the service flow identifier in the embodiment of the present invention;

6a is a data structure diagram of RTP multiplexing in an embodiment of the present invention;

6b is a data structure diagram of UDP multiplexing in the embodiment of the present invention;

7 is a schematic structural diagram of an RTP compression head according to an embodiment of the present invention;

8 is a schematic structural diagram of an IuUP packet header in FIG. 6a and FIG. 6b;

9 is a flow chart of a second embodiment of a data receiving method of the present invention;

FIG. 10 is a flowchart of a fourth embodiment of a data transmitting method according to the present invention; FIG.

11 is a flowchart of a third embodiment of a data receiving method of the present invention;

12 is a schematic block diagram of a first embodiment of a communication system according to the present invention, showing a first embodiment of the wireless access point device of the present invention and a first embodiment of the access gateway of the present invention;

Figure 13 is a schematic block diagram of a second embodiment of the communication system of the present invention;

14 is a schematic block diagram of a second embodiment of a wireless access point device of the present invention;

15 is a schematic block diagram of a second embodiment of an access gateway of the present invention. detailed description

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

Referring to FIG. 1, an access gateway (Access Gateway, referred to as "AG") on the CN side controls radio resources of the UTRAN, and completes radio resource control (RRC) connection establishment and disconnection, handover, macro diversity, and Features such as wireless resource management. The Access Point (AP) completes the processing of the physical layer protocol of the Uu interface, including spread spectrum, modulation, channel coding and despreading, demodulation, channel decoding, and also includes mutual conversion of baseband signals and radio frequency signals. And other functions. The AP is interconnected with the AG through the elu interface. For Packet Switched (PS) user plane services, the elu interface protocol stack is similar to the standard Iu-PS interface protocol stack; for circuit switched ("CS") user plane services, the elu interface The protocol stack is similar to the standard Iu-CS interface protocol stack. The CS data of the AP is encapsulated in an IuUP frame and encapsulated by the Real-Time Transport Protocol/User Datagram Protocol/Internet Protocol (RTP/UDP/IP) and transmitted on the elu interface.

Different from the broadband communication service between the core network side devices, the main application scenario of the AP is the home application, in order to solve the problem of poor coverage of the 3G network. ADSL/ADSL2+ technology is the primary access method for home users. Therefore, one of the main transmission bearers of the elu interface is the ADSL/ADSL2+ line. As shown in Figure 2, devices such as phones and APs access ADSL/ADSL2+ modems to form a home network, and the APs communicate with wireless UEs. All services are connected to the broadband access network through a twisted pair, and the broadband access network is connected to the AG through the FE/GE interface.

For AP applications, the encapsulated security payload (ESP) ramp mode, such as IPsec, is typically used to encapsulate data to provide confidentiality, data source authentication, anti-replay, and data integrity security services for IP datagrams on the elu interface. . The protocol stack for encapsulating elu interface voice service data with IPSec is shown in Figure 3. Among them, the Broadband Access Server (BAS) or the Dynamic Host Configuration Protocol (DHCP) server can be selected. The AP can use the point-to-point protocol (Point-to). -Point Protocol, referred to as "PPP" for authentication, can also use DHCP server authentication.

For CS voice services, the transport block (TB) generated by the AP in each transmission time interval (TTI), and the Iu interface user plane protocol/real-time transport protocol/user datagram protocol/Internet protocol (IuUP/RTP) in the AP /UDP/IP ) Encapsulation, then IPSec encryption, transmission through ADSL modem. The ADSL Modem is packaged in the asynchronous transfer mode adaptation layer type 5/Asynchronous Transfer mode (AAL5 " / "ATM") and then transmitted on the ADSL line.

In carrying out the creation of the present invention, the inventors have found that at least the following problems exist when transmitting, transmitting, and receiving data using the UTRAN system:

As can be seen from FIG. 3, when the elu interface service data passes through the ADSL modem-DSLAM link segment, there are more protocol stacks, that is, the protocol layer is used more, that is, the transmission efficiency is lower. Typically, the protocol and total overhead of the service data through the ADSL modem to the DSLAM link are shown in Table 1.

Table 1: The protocol and total cost of the service data passing through the ADSL modem to the DSLAM link according to the encryption method and authentication method (message digest algorithm or secure hash algorithm, etc.) used, and the payload length, the overhead length of the IPSec layer. Variable, here calculated as a typical value of 32 bytes. If the AAL5 layer padding byte and ATM layer overhead are not considered, the total transport layer overhead is equal to 129/169 (IPv4/IPv6) bytes.

For example, for Adaptive Multi-Rate (AMR) 12.2 kbps service, a TTI (equal to 20 ms) payload length is 32 bytes, plus a transport layer overhead of 129 bytes (here calculated in IPv4). The length of the AAL5 layer is 161 bytes. Considering the padding byte and ATM layer overhead that need to be increased by an integer multiple of 48 bytes, four ATM cells need to be transmitted. The total length of the ATM layer is equal to 4x53= 212 bytes, therefore, the transmission efficiency of the ADSL link segment is 32/212xl00%=14.4%. The ADSL layer occupied by an AMR 12.2 kbps voice service has a transmission bandwidth equal to 212x8/20 = 84.8 kbps.

In addition to the above technical problems in the use of UMTS to transmit multi-channel voice data, in other application scenarios, such as using GSM AP, CDMA AP, and WiMAX AP to transmit multiple voice data. Similar technical problems exist.

At present, the wireless access point device connecting a few wireless users' network applications is a relatively new technology, and its purpose is to solve the technical problem that wireless terminals in indoors or in poor signal locations cannot connect to the base station. In existing mobile communication networks, it is not possible to cover the extent of the signal at any location, but some locations where the signal is not covered may have wired communication network nodes, such as fixed telephones. Therefore, the wireless access point device can be set up in a place where the mobile network does not cover and the wired network exists, and the wireless access point device is connected to the wired network, and below, multiple wireless terminals can be connected. When a wireless terminal moves to the coverage of the wireless access point, it finds that it cannot connect with the original mobile network, or finds that it has entered the wireless access point device signal coverage, and can switch to the wireless access point device. However, when multiple wireless users access the wireless access point device together, the wireless access point device may be heavily loaded, affecting other services using the network, or the wireless terminal itself may not be deployed normally. The invention can solve the technical problem.

Therefore, an aspect of the present invention is to allow a service data of at least two users to share a transport layer overhead in the same wireless access point device, that is, to add a multiplexing subheader in a service flow payload of each user service, or For user identification, or service flow identification (detailed in the following embodiment section), can be used to identify individual users, and then each includes a service flow identifier (or called a multiplex sub-header, or The user ID), the header and the data payload are multiplexed together as the payload of the RTP packet. In this way, the service data of at least two users can be shared by the transport layer, and the average transmission overhead spread to each user service is reduced, thereby improving transmission efficiency.

Alternatively, each of the service flow identifiers (or referred to as multiplex subheaders, or user identifiers), RTP compression headers, message headers, and data payloads may be multiplexed together as a payload of the UDP packet. In this way, the service data of at least two users can share the transport layer overhead, and the average transmission overhead spread to each user service is reduced, thereby improving transmission efficiency.

First, the data transmission method of the present invention provides a first implementation manner. In the scenario of RTP multiplexing, the following steps are included:

Step A1: Circuit switched domain service data transmitted between the wireless access point and the access gateway Add a corresponding service flow identifier before the packet header and the message payload, and mark the user to which the packet belongs and the length of the packet;

Step A2: multiplexing at least two of the message payload, the packet header, and the corresponding service flow identifier as the payload of the RTP data packet;

Step A3: Send the multiplexed RTP data packet.

In the scenario of UDP multiplexing, this embodiment may also include the following steps:

Step A1: Add a corresponding service flow identifier to the RTP compression header, the 4 艮 header, and the 4 艮 payload of the circuit switched domain service data transmitted between the wireless access point and the access gateway, and mark the packet The user and the length of the message;

Step A2: multiplexing at least two of the message payload, the packet header, the RTP compression header, and the corresponding service flow identifier as the payload of the UDP data packet;

Step A3: Send the multiplexed UDP packet.

The above embodiment can be seen that, in a specific scenario transmitted between the wireless access point and the access gateway, the packet payload, the packet header, and the corresponding service flow identifier including at least two user data are multiplexed in the Together, as the payload of the RTP data packet; or multiplexing the message payload including at least two user data, the 4 艮 header, the RTP compression header, and the corresponding service flow identifier as the payload of the UDP packet Compared with the prior art, the transmission efficiency is too low due to the excessive protocol stack of the ADSL modem to the DSLAM link segment. The embodiment of the present invention allows at least two circuit switched domain service data sharing for the special case of the segment transmission link. The overhead of the transport layer is reduced, so that the average transmission cost of each user service is reduced, thereby ensuring service quality and improving transmission efficiency.

The present invention provides a first implementation manner of the data receiving method corresponding to the first embodiment of the foregoing data transmission method. In the scenario of RTP multiplexing, the following steps are included:

Step B1: receiving an RTP multiplexed circuit switched domain service RTP data packet transmitted between the wireless access point and the access gateway; Step B2: parsing the multiplexed data from the data packet;

Step B3: Demultiplexing the service flow identifier and the packet header of each user data from the multiplexed data, where the service flow identifier marks the length of the user to which the packet belongs and the length of the packet;

Step B4: Obtain a packet payload corresponding to the length of the user and the packet according to the service flow identifier.

Step B1: receiving a UDP-multiplexed circuit switched domain service UDP data packet transmitted between the wireless access point and the access gateway;

Step B2: parsing the multiplexed data from the data packet;

Step B3: Demultiplexing the service flow identifier of each user data from the multiplexed data,

An RTP compression header, a message header, the service flow identifier marking a length of the user to which the message belongs and a length of the message;

The embodiment provides a first implementation manner corresponding to the foregoing data transmission method, where the body that receives the RTP multiplexed data packet or the UDP multiplexed data packet may be a wireless access point or an access gateway, and the access gateway may connect each Different communication networks, therefore, demultiplexing the received data at the access gateway location, obtaining RTP data or UDP data of each user, and then transmitting to the corresponding wireless access point or communication network according to the target address, assisting wireless access Point to implement RTP multiplexing or UDP multiplexing.

For convenience of description, the following embodiments implement the embodiments of the present invention by taking, transmitting, and receiving voice services as an example.

Referring to FIG. 4, which is a flowchart of a second embodiment of a data transmitting method according to the present invention, the method includes the following steps:

In the scenario of RTP multiplexing, see Figure 4a, step 401a: select the same wireless access point And circuit-switching domain service data of at least two users, and adding a corresponding service flow identifier before the selected packet header and the payload of each user's data, marking the user to which the 4-page text belongs and The length of the message;

In the scenario of UDP multiplexing, referring to FIG. 4b, step 401b: selecting circuit switched domain service data of at least two users under the same wireless access point, and selecting an RTP compression header and a report for each user's data. Before the header and the packet payload, the corresponding service flow identifier is added, and the user to which the packet belongs and the length of the packet are marked.

For convenience of description, the present invention describes an ADSL application scenario. In this scenario, multiple wireless user terminals are connected under the wireless access point, and the wireless access point is connected to the access gateway of the core network through an ADSL modem, DSLAM, and IP/Ethernet (IP network). The ADSL modem can also be connected to a regular telephone.

In the scenario of RTP multiplexing, when the wireless access point detects that the multiple wireless user terminals perform AMR voice service at the same time, RTP multiplexing may be performed on all user data, firstly: for each user voice service data The corresponding service flow identifier is added before the IuUP packet header and the IuUP packet payload. The definition of the service flow identifier can be seen in Figure 5a. The service flow identifier is used to mark the user to which the message belongs and the length of the message. In this embodiment, one byte is used for marking.

In Figure 5a, this byte contains two fields, the user ID and the length indication. The user identification field is used to identify which user the AMR voice service flow belongs to, which is 2 bits, and can identify 4 users, and can reuse 4 AMR voice service flows. The length indication field is used to indicate the total length of the AMR voice service flow plus the IuUP header (excluding the length of the service flow identifier itself), which is 6 bits, and can indicate 63 bytes (=2 ⁶ -1 ) to satisfy the AMR voice service flow. The maximum length plus the total length of the IuUP header.

In the scenario of UDP multiplexing, when the wireless access point detects that the multiple wireless user terminals perform AMR voice service at the same time, UDP multiplexing may be performed on all user data. First, the voice is used for each user. RTP compression header, IuUP header and The corresponding service flow identifier is added before the IuUP 4 payload, and the definition of the traffic identifier can be seen in Figure 5b. The service flow identifier is used to mark the user to which the message belongs and the length of the message. In this embodiment, three bytes are used for marking.

The service flow identifier contains a service flow identification field and a length indication field. The service flow identification field is used to identify which user the AMR voice service flow belongs to, and is 2 bytes in length. The length indication field is used to indicate the total length of the AMR voice service flow plus the IuUP header and the RTP compression header (excluding the length of the service flow identification field itself), and the length is 1 byte, which can indicate 255 bytes (=2 ⁸ -1 ) The maximum length of the AMR voice service flow and the total length of the IuUP packet header are met.

In addition, you can also choose to multiplex some users' voice service data. Specifically, you need to select user data for UDP or RTP multiplexing, and then reuse them.

In the scenario of RTP multiplexing, referring to FIG. 4a, step 402a: multiplexing the packet payload, the packet header, and the added service flow identifier of each user data as the payload of the RTP data packet; The point continues to perform RTP multiplexing, specifically multiplexing all the user data or the selected part of the user data packet payload, the packet header, and the added respective service identifiers, as the payload of the RTP data packet, encapsulated into RTP/UDP/IP and the underlying protocol; for example, multiplexing multiple user data that needs to perform AMR voice service at the same time, that is, the packet payload, packet header, and service flow identifier of each user data as one The subunit encapsulates a plurality of the subunits as a payload of an RTP data packet.

For example, as shown in Figure 6a, the ARP voice can be seen. Each IuUP packet corresponds to a user identifier or a service flow identifier, and the IuUP packet, or IuUP packet payload, or service flow payload includes: an IuUP packet header and a message payload. The user ID or service flow identifier is the IuUP packet exclusive cost, or the service flow exclusive cost.

In the scenario of UDP multiplexing, referring to FIG. 4b, step 402b: multiplexing the message payload, the 4 艮 header, the RTP compression header, and the added service flow identifier of each user data as UDP. The payload of the packet;

The wireless access point continues to perform UDP multiplexing, specifically multiplexing all the user data or the selected part of the user data packet payload, the packet header, the RTP compression header, and the added respective service identifiers as UDP data. The payload of the packet is encapsulated into UDP/IP and the underlying protocol; for example, multiplexing multiple user data that needs to perform AMR voice service at the same time, that is, the payload of the packet for each user data, the header of the packet, The RTP compression header and the service flow identifier are used as a subunit, and a plurality of the subunits are encapsulated as a payload of a UDP packet.

Taking AMR voice as an example, the encapsulated data packet structure can be seen in Figure 6b. It can be seen that each IuUP packet contains an AMR voice service flow and an IuUP header, and the AMR voice service flow is a message payload, and the IuUP packet is used as a service flow. The payload of each IuUP packet, or service flow overhead, consists of two parts: the RTP compression header and the service flow identifier. The RTP compression header contains two parts of information, one part is the serial number (1 byte), one part is the timestamp (2 bytes), and the RTP compression header is defined as shown in Figure 7. The service flow identifier is mainly used to identify the corresponding service flow. The length of the user and the business flow. Based on the data packet structure defined in Figure 6b, multiplexing of the same user service flow can be realized, and multiplexing of different user service flows can also be realized.

Referring to FIG. 8, FIG. 8 is a schematic structural diagram of an IuUP packet header in FIG. 6a and FIG. 6b. The IuUP header of each AMR voice service flow includes a PDU type, a frame number, a frame quality control (FQC), and an RAB sub-flow combination indicator. , referred to as RFCI), Header Cyclic Redundancy Check and Payload Cyclic Redundancy Check. The PDU type is used to indicate the PDU type. The RFCI is used to indicate the RAB substream type and combination in the AMR voice service flow, and gives a Frame Number. The Frame Number can be a time-based or transmitted IuUP PDU. When the Frame Number is based on the time number, the purpose of the Frame Number is to help handle the Time Alignment function; when the Frame Number is based on the transmitted IuUP PDU, the frame number ( Frame The purpose of Number ) is to provide the receiving entity with a mechanism to understand the loss of IuUP frames. FQC is used for frame quality grading. The CRC is used for header (header) and payload (payload) checks.

In the scenario of RTP multiplexing, referring to FIG. 4a, step 403a: transmitting the multiplexed RTP data packet.

In the scenario of UDP multiplexing, see FIG. 4b, step 403b: transmitting the multiplexed

UDP packet

After multiplexing the AMR voice service flows of each user, the access gateways in the core network are sent through the wireless access point, the client device, the central office device, and the IP/Ethernet network. In this embodiment, the access gateway may be sent to the core network through a wireless access point, an ADSL modem, a DSLAM, or an IP/Ethernet network.

The third embodiment of the data transmitting method of the present invention is similar to the second embodiment described above, except that: the multiplexed data stream passes through a cable modem (Cable modem), and the cable modem head end system CMTS (Cable Modem Termination System) ) and IP/Ethernet networks for transmission.

Referring to FIG. 9 , the present invention further provides a second embodiment of a data receiving method, which corresponds to the foregoing second embodiment of the data sending method, where the UDP multiplexing scenario is taken as an example, and the RTP multiplexing scenario is similar to the UDP multiplexing scenario. Further reference can be made to the text description of the following embodiments. The second embodiment of the data receiving method includes the following steps:

In the scenario of RTP multiplexing, step 801 is to receive an RTP multiplexed circuit switched domain service RTP data packet transmitted between the wireless access point and the access gateway;

In the scenario of UDP multiplexing, step 801 may be: receiving a UDP-multiplexed circuit switched domain service UDP data packet transmitted between the wireless access point and the access gateway;

In this step, the received RTP data packet or the UDP data packet is sent from the wireless access point, and is transmitted through the user equipment, the central office equipment, and the IP network. Specifically, the embodiment uses the data as the adaptive multi-rate AMR voice. The data is taken as an example for explanation. In this embodiment, the user equipment and the central office equipment may be an ADSL modem and a DSLAM, respectively, and may also be a cable modem and a cable modem head end system (CMTS).

In the scenario of RTP multiplexing, step 802 is to parse the multiplexed RTP data from the data packet.

In the scenario of UDP multiplexing, step 802 may be: parsing the multiplexed UDP data from the data packet;

Specifically, the access gateway parses the multiplexed data from the data packet according to a demultiplexing method negotiated with the wireless access point. In the UDP multiplexing scenario, the data includes the multiplexed voice service reports. The service flow identifier, the RTP compression header, the IuUP packet header, the IuUP packet payload, or the RTP multiplexed scenario, the data includes the service flow identifier and the IuUP packet of the multiplexed voice service packets. Header, IuUP message payload. The parsing method may be that the access gateway reverses the operation of multiplexing and encapsulating data according to the wireless access point. In the scenario of UDP multiplexing, the protocol layer data such as IP is removed, and the service flow identifier, RTP compression header, IuUP packet header, and IuUP packet payload of all voice service packets are left, that is, the UDP is reserved. Packet payload. In the scenario of RTP multiplexing, the protocol layer data such as UDP/IP is removed, and the service flow identifier, IuUP packet header, and IuUP packet payload of all voice service packets are left, that is, the multiplexed RTP packets are left. Payload.

In the scenario of RTP multiplexing, step 803: Demultiplexing the service flow identifier and the packet header of each voice service packet from the multiplexed data, where the service flow identifier marks the user to which the packet belongs And the length of the message;

This step is a process of parsing the above steps, and demultiplexing the multiplexed RTP payload, according to the data format of the wireless access point after adding the service flow identifier before the packet header and the message payload, from a single user. The service flow identifier and the packet header are parsed in the data packet.

In the scenario of UDP multiplexing, step 803 may be: demultiplexing from the multiplexed data. The service flow identifier, the RTP compression header, and the packet header of each voice service packet, where the service flow identifier marks the length of the user to which the packet belongs and the length of the packet;

This step is a process of resolving the multiplexed UDP payload, and the data format is added according to the wireless access point before the RTP compression header, the packet header, and the packet payload. The service flow identifier, the RTP compression header, and the packet header are parsed from a single user's data packet.

In the scenario of RTP multiplexing, step 804: Obtain a packet payload corresponding to the length of the user and the packet according to the service flow identifier.

First, according to the two bits in the user identification field of the one-byte length in the service flow identification field, the user to which the message belongs is determined, and then the length of the packet is determined, and the length is obtained from the multiplexed data. In other embodiments, one byte or three or four bytes may be used to identify the user to which the message belongs, and other bytes identify the length of the message.

In the scenario of UDP multiplexing, step 804 may be: obtaining, according to the service flow identifier, a packet payload corresponding to the length of the user and the packet;

First, according to the two-byte user identification field in the service flow identification field, the user to which the message belongs is determined, and then the length of the message is determined according to the length of the one-byte field, and the obtained data is obtained from the multiplexed data. In other embodiments, one byte or three or four bytes may be used to identify the user to which the message belongs, and other bytes identify the length of the message.

In the scenario of RTP multiplexing, step 805: encapsulating the packet header and the packet payload of each user into respective data packets;

In the scenario of UDP multiplexing, step 805 may be: encapsulating the RTP compression header, the packet header, and the packet payload of each user into respective data packets;

In order to forward the AMR voice service data of each user, the data needs to be separately encapsulated separately after the obtained user headers and their payloads. Step 806: Send the encapsulated data packet.

For the target address in the header, the access gateway sends the AMR voice service data of the corresponding user to the target address.

The above is a method for transmitting multiplexed data from a wireless access point to an access network. The following describes an embodiment of the method for transmitting multiplexed data from an access gateway to a wireless access point.

Referring to FIG. 10, a fourth embodiment of the data transmission method of the present invention is provided. The UDP multiplexing scenario is taken as an example. The RTP multiplexing scenario is similar to the UDP multiplexing scenario. . Data Transmission Method The fourth embodiment includes the following steps:

In the scenario of RTP multiplexing, step 901: selecting circuit switched domain service data of at least two users whose destination addresses are the same wireless access point, and before selecting the data packet header and the text payload of each user. Add a corresponding service flow identifier;

In the scenario of UDP multiplexing, step 901 may be: selecting circuit switched domain service data of at least two users whose destination addresses are the same wireless access point, and compressing the header and text for each selected user RTP data. Add the corresponding service flow identifier before the header and the payload;

In the scenario of RTP multiplexing, step 902: adding a corresponding service flow identifier before the packet header and the payload of each user voice data packet, marking the user and the message to which the 4艮 text belongs. length;

In the scenario of UDP multiplexing, step 902 may be: adding a corresponding service flow identifier to the RTP compression header, the packet header, and the packet payload of each user voice data packet, and marking the packet to belong to User and the length of the message;

In the scenario of RTP multiplexing, step 903: multiplexing the packet payload, the packet header, and the respective service flow identifiers of the at least two users as the payload of the RTP data packet, and packaging the data into the RTP/UDP. /IP and underlying protocol;

In the scenario of UDP multiplexing, step 903 may be: including at least two users. The payloads, 4 艮 headers, RTP compression headers, and respective service flow identifiers are multiplexed together as the payload of the UDP packet, encapsulated into UDP/IP and the underlying protocol;

In the scenario of RTP multiplexing, step 904: Send the multiplexed RTP data packet to the wireless access point.

In the scenario of UDP multiplexing, step 904 may be: sending the multiplexed UDP data packet to the wireless access point.

It can be seen that the foregoing embodiment is similar to the foregoing embodiment of the present invention. When receiving voice data from different users on the access gateway side, the user whose destination address is the same wireless access point is selected. Data, and then multiplex the message payload, the packet header, the RTP compression header, and the respective service flow identifiers of the foregoing user voice data, or the message payload and the packet header of each user voice data. The respective service flow identifiers are multiplexed together, as the payload of the UDP data packet or the RTP data packet, and the technical problem of the transmission efficiency is too low due to the excessive ADSL modem-DSLAM link segment protocol stack in the prior art, the embodiment of the present invention For the special case of the transmission link, the voice data of multiple users share the overhead of the transmission layer, so that the average transmission overhead allocated to each user service is reduced, thereby improving the transmission efficiency.

In other embodiments, in the scenario of RTP multiplexing, the user identifier corresponding to the packet header and the payload of each user is increased by: adding an IuUP user identifier to each user's IuUP header and IuUP payload. . Moreover, the length of the user identifier is one byte, and two bits of the user identifier are used to identify the user to which the message belongs, and the other bits of the byte are used to identify the length of the message. Of course, two or three bytes or the like can also be used as the length of the user identification.

Or, in the scenario of UDP multiplexing, the identifiers corresponding to the RTP compression header, the packet header, and the payload of each user are added to: include an RTP compression header for the IuUP header and the IuUP payload of each user service flow. , business flow identification. Moreover, the length of the service flow identifier is three bytes, and two bytes are used to identify the user to which the message belongs, and one byte is used to identify the length of the message. Of course, one byte or three bytes or four bytes may be used as the length of the service flow identifier. Referring to Fig. 11, a third embodiment of the data receiving method of the present invention is provided corresponding to the fourth embodiment of the data transmitting method of the present invention. The UDP multiplexing scenario is used as an example. The RTP multiplexing scenario is similar to the UDP multiplexing scenario. You can refer to the text description of the following embodiments. Data Receiving Method The third embodiment includes the following steps:

In the scenario of RTP multiplexing, step 1001: the wireless access point receives the response from the access gateway.

RTP multiplexed circuit switched domain service data packet; in a UDP multiplexed scenario, step 1001 may be: The wireless access point receives the RTP multiplexed circuit switched domain service data packet from the access gateway;

In the scenario of RTP multiplexing, step 1002: parsing RTP multiplexed data from the user data packet protocol data packet;

In the scenario of UDP multiplexing, step 1002 may be: parsing UDP multiplexed data from a user data packet protocol data packet;

In the scenario of RTP multiplexing, step 1003: Demultiplexing the service flow identifier, the packet header, and the packet payload of each user service from the data, where the service flow identifier marks the user to which the packet belongs. And the length of the message;

In the scenario of UDP multiplexing, step 1003 may be: demultiplexing the service flow identifier, the RTP compression header, the packet header, and the packet payload of each user service from the data, where the service flow identifier is The user to which the message belongs and the length of the message;

Step 1004: Obtain a message payload corresponding to the length of the user and the packet according to the service flow identifier.

The present embodiment is a process in which a wireless access point receives and demultiplexes RTP data packets or UDP data packets from an access gateway.

In the data receiving method, the wireless access point can receive AMR voice data through an IP/Ethernet network, a central office device, and a client device, and the method includes but is not limited to the following two types:

1) The wireless access point accesses the multiplexer DSLAM through the IP/Ethernet network and digital subscriber line. And an asymmetric digital subscriber loop ADSL modem receives adaptive multi-rate AMR voice data; or

2) The wireless access point receives AMR voice data over the IP/Ethernet network, CMTS, and cable modem. The payload is sent wirelessly to the corresponding user terminal.

Of course, the data transmission and reception method of the present invention can also be applied to a video service, such as a video telephone service. At this time, the user circuit switched domain service data is video telephone service data.

In the scenario of RTP multiplexing, when marking the user to which the message belongs and the length of the message: use the partial bits of the two bytes to identify the user to which the message belongs, and use the other bits of the two bytes. A portion of the bits identify the length of the 4 艮 text. For example, a part or all of the bits of a byte are used to identify the user to which the message belongs, and the length of the message is used to identify the length of the message. .

In the scenario of UDP multiplexing, when marking the user to which the message belongs and the length of the message: identify the user to which the message belongs by using a part of the three bytes, and use the other bits of the three bytes. A portion of the bits identify the length of the 4 艮 text. For example, a part or all of the bits of a byte are used to identify the user to which the message belongs, and the length of the message is used to identify the length of the message. .

A person skilled in the art can understand that all or part of the steps of implementing the above data transmission and receiving methods can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium. The program, when executed, may include the foregoing various embodiments of the present invention. The storage medium referred to herein is, for example, a ROM/RAM, a magnetic disk, an optical disk, or the like.

Referring to FIG. 12, FIG. 12 is a schematic block diagram of a first embodiment of a communication system of the present invention, showing a first embodiment of a wireless access point device of the present invention. The wireless access point device includes: The first marking unit 1110, in the scenario of RTP multiplexing, is configured to add a corresponding service flow identifier before the payload of the circuit switched domain service data.

Or in the UDP multiplexing scenario, the corresponding RTP compression header and the service flow identifier are added before the packet header and the packet payload of the circuit switched domain service data; the service flow identifier is used to mark the user to which the packet belongs. And the length of the message;

The first multiplexing unit 1120 is configured to multiplex the message payload of the at least two users, the packet header, and the respective service flow identifiers added by the first marking unit 1110 in a scenario of RTP multiplexing. Together, as the payload of the RTP packet;

Or in the scenario of UDP multiplexing, the packet payload, the packet header, the RTP compression header, and the respective service flow identifiers added by the first marking unit 1110 are multiplexed together by the at least two users. The payload as a UDP packet;

The first sending unit 1130 is configured to send the RTP data packet or the UDP data packet output by the first multiplexing unit 1120.

In this embodiment, the first sending unit 1130 may transmit the multiplexed service data by using the user equipment, the central office equipment, and the IP network. Specifically, the embodiment uses the adaptive multi-rate AMR voice data as an example. description.

The client device and the central office device may be an ADSL modem and a DSLAM, respectively, and may also be a cable modem and a CMTS, respectively.

The first marking unit 1110 is specifically configured to add an RTP compression header, an IuUP service flow identifier, or an RUP multiplexing scenario to the IuUP header and the IuUP payload of each user voice service in a scenario of UDP multiplexing. The IuUP service flow identifier is added to the IuUP header and the IuUP payload for each user voice service.

Referring to FIG. 12, FIG. 12 is a schematic block diagram of a first embodiment of a communication system according to the present invention. The first embodiment of the access gateway of the present invention is shown, which corresponds to the first implementation manner of the foregoing wireless access point device, and the access gateway includes: The second receiving unit 1140 is configured to receive the RTP multiplexed RTP data packet from the wireless access point, that is, receive the RTP data packet from the first sending unit 1130 in a scenario of RTP multiplexing;

Or in a scenario of UDP multiplexing, for receiving a UDP-multiplexed UDP data packet from a wireless access point, that is, receiving a UDP data packet from the first sending unit 1130; and a second parsing unit 1150, In the RTP multiplexing scenario, the RTP multiplexed data is parsed from the RTP data packet output by the second receiving unit 1140;

Or in the scenario of UDP multiplexing, for parsing UDP multiplexed data from the UDP data packet output by the second receiving unit 1140.

The second demultiplexing unit 1160 is configured to demultiplex the service flow identifier and the packet header of each user data from the data output by the second parsing unit 1150 in a scenario of RTP multiplexing, where the service flow is Defining the length of the user to which the packet belongs and the length of the packet, and demultiplexing the user data from the data output by the second parsing unit 1150 according to the service or in a UDP multiplexing scenario. The service flow identifier, the RTP compression header, and the packet header, the service flow identifier marks the length of the user to which the packet belongs and the length of the packet, and obtains the RTP compression header and the report of the user according to the service flow identifier. The header and the payload of the message corresponding to the length of the message.

Optionally, in other implementation manners, if the data needs to be further forwarded, the method further includes:

The first encapsulating unit 1170 is configured to use, in the scenario of the RTP multiplexing, the second demultiplexing or UDP multiplexing scenario, for each user that outputs the second demultiplexing unit 1160. The RTP compression header, the packet header, and the message payload are encapsulated into respective data packets;

The third sending unit 1180 is configured to send a data packet of each user output by the first encapsulating unit 1170. In further embodiments, the service may be a voice service, such as an AMR voice service, or a video service, such as a video telephony service, or other services in a circuit switched domain.

For the voice service, the second demultiplexing unit 1160 is specifically configured to parse the IuUP service flow identifier and the IuUP packet header of each user voice service packet from the data packet payload in the scenario of RTP multiplexing. Obtaining, according to the IuUP service flow identifier, an IuUP packet header of the user and an IuUP packet payload corresponding to the packet length;

Or in the UDP multiplexing scenario, the IuUP service flow identifier, the RTP compression header, and the IuUP packet header for parsing the voice service packets of the user from the data packet payload, and according to the IuUP service flow identifier. And obtaining an RTP compression header, an IuUP packet header, and an IuUP packet payload of the corresponding packet length.

Referring to FIG. 13, the present invention further provides a second implementation manner of an access gateway, including:

The selecting unit 1210 is configured to select an RTP voice data packet or a UDP voice data packet whose destination address is different receiving users of the same wireless access point;

The second marking unit 1220 adds a corresponding service flow identifier before the packet header and the message payload of each user voice data packet selected by the selecting unit 1210 in the RTP multiplexing scenario.

Or in the scenario of UDP multiplexing, the RTP compression header, the 4 艮 header, and the 4 艮 payload of each user voice data packet selected by the selecting unit 1210 are added with corresponding service flow identifiers, and the service is added. The flow identifier marks the length of the user to which the packet belongs and the length of the packet;

The second multiplexing unit 1230, in the scenario of RTP multiplexing, is used as the RTP for the message payload of the at least two users, the packet header, and the respective service flow identifiers added by the second marking unit 1220. The payload of the packet, encapsulated into RTP/UDP/IP and the underlying protocol;

Or in the scenario of UDP multiplexing, the packet service payload, the packet header, the RTP compression header, and the second service unit identifier added by the second label unit 1220 are used as UDP packets. The payload, encapsulated into UDP/IP and the underlying protocol; The second sending unit 1240 is configured to send an RTP data packet or a UDP data packet output by the second multiplexing unit 1230 to the wireless access point.

In other embodiments, the first and second embodiments of the access gateway may be integrated to implement the respective functions.

Referring to FIG. 14, the present invention further provides a second implementation manner of a wireless access point device, corresponding to the second implementation manner of the access gateway, including:

The first receiving unit 1310 is configured to receive the RTP multiplexed RTP data packet from the access gateway, or to receive the UDP multiplexed UDP data packet from the access gateway;

The first parsing unit 1320 is configured to parse RTP multiplexed user voice service data from the RTP data packet received by the first receiving unit 1310 in a scenario of RTP multiplexing;

Or, in a scenario of UDP multiplexing, parsing UDP-multiplexed user voice service data from the UDP data packet received by the first receiving unit 1310;

The first demultiplexing unit 1330 is configured to parse a service flow identifier and a packet header of each user voice service from the data output by the first parsing unit 1320 in a scenario of RTP multiplexing, where the service flow identifier is used. Marking the length of the user to which the packet belongs and the length of the packet, and obtaining the payload of the packet corresponding to the length of the user and the packet according to the service flow identifier;

Or in a scenario of UDP multiplexing, the service flow identifier, the RTP compression header, and the packet header of each user voice service are parsed from the data output by the first parsing unit 1320, and the service flow identifier is The user to which the packet belongs and the length of the packet, and the payload of the packet corresponding to the length of the user and the packet is obtained according to the service flow identifier.

The demultiplexed message payload can be sent to the corresponding wireless user device under the wireless access point device.

In other embodiments, the present invention may further provide the first and second implementation manners of the wireless access point device to integrate the respective functions.

Referring also to FIG. 12, the present invention also provides a first embodiment of a communication system, including a wireless access point. Equipment and access gateway. For a specific implementation manner of the wireless access point device and the access gateway, refer to the foregoing descriptions of various communication systems, wireless access point devices, and access gateway embodiments.

Referring to FIG. 15, in other embodiments, the communication system may further include:

An IP/Ethernet network 1410, a digital subscriber line access multiplexer DSLAM 1420, and an asymmetric digital subscriber loop ADSL modem 1430 are connected in series between the first transmitting unit 1130 and the second receiving unit 1140; or

An IP/Ethernet network, a cable modem head end system CMTS, and a cable modem are connected in series between the first transmitting unit 1130 and the first receiving unit 1140.

The foregoing technical solution can be seen that the technical solution provided by the embodiment of the present invention increases in the specific scenario between the wireless access point and the access gateway, before the packet header and the message payload of the circuit switched domain service data. Corresponding service flow identifier, marking the length of the user to which the message belongs and the length of the packet, multiplexing the packet payload, the packet header, and the respective service flow identifiers of at least two users, as the net of the RTP data packet The cost of each segment of the user is shared by the data of the segment, so that the average transmission cost evenly distributed to each user service is reduced, thereby improving the transmission efficiency.

Alternatively, in a specific scenario transmitted between the wireless access point and the access gateway, the corresponding service flow identifier is added before the real-time transport protocol compression header, the packet header, and the packet payload of the circuit switched domain service data, and the label is added. The user and the length of the packet to which the packet belongs are multiplexed with the packet payload, the packet header, the real-time transport protocol compression header, and the respective service flow identifiers of the two users as the payload of the UDP packet. The data of each user is shared by the data of the segment, so that the average transmission cost evenly distributed to each user service is reduced, thereby improving the transmission efficiency.

The embodiment of the invention uses the UDP packet multiplexing or RTP packet multiplexing multiplexing method to reduce the amount of data transmission and meet the requirements of simultaneously using two users.

It should be noted that the foregoing units in the first embodiment of the wireless access point device of the present invention may be integrated into one processing module. Similarly, other embodiments of the foregoing wireless access point of the present invention are connected. Each unit in each embodiment of the gateway and communication system can also be integrated into one processing module; or in a module.

It should be noted that the units in the embodiments of the wireless access point device, the access gateway, and the communication system in the embodiments of the present invention may be implemented in the form of hardware, and the software-implemented part may also use the software. The form of the functional module is implemented. Accordingly, embodiments of the invention may be sold or used as separate products, and the software implementable portions may also be stored in a computer readable storage medium for sale or use.

In addition, the embodiments of the present invention can be used for GSM AP, CDMA AP, WiMAX AP, and WiFi to improve transmission efficiency when transmitting multiple voice data. Taking the GSM AP as an example, the overall technical solution is the same as this one. The only difference is that the air interface technology used is different from that of the UMTS AP. However, the signal processing principle of the AP after receiving the air interface demodulation is the same as the technical solution. The technical solution of the AG processing is also the same as the technical solution provided by the embodiment of the present invention.

The embodiment of the present invention is not limited to the interface application of the UMTS AP/AG elu, and is not limited to the voice service of the elu interface, and can also be applied to the video telephone service and the fax service.

In summary, the present invention can at least produce the following technical effects:

The embodiment of the present invention can effectively reduce the average cost of real-time transmission protocol data transmission between the wireless access point device and the access gateway, improve transmission efficiency, and save transmission bandwidth;

2. It can improve the transmission efficiency of voice and video services;

For example, the efficiency of the multiplexing of different user voice services and the ADSL layer rate are shown in the following table. It can be seen from the table that after the multiplexing technology is used, when the ADSL layer provides only 128 kpbs bandwidth, it can carry voice services of four wireless terminals. And using the conventional method, only one voice service of the wireless terminal can be transmitted. 1 voice user industry reuse 2 users reuse 3 users reuse 4 user services (no multiplexing) business business services

ATM cell number 4 5 5 6

Efficiency 14.4% 24.1% 36.2% 40.3%

ADSL layer rate / user 84.8 kbps 53.0 kbps 35.3 kbps 31.8 kbps

ADSL layer total rate 84.8 kbps 106.0 bps 106.0 bps 127.2 bps Table 2: Efficiency and ADSL layer rate comparison table for multiplexing different user services

3. Since the bandwidth can be effectively saved, each wireless access point device can allow two or more wireless user terminals to simultaneously use the circuit switched domain service, and only one wireless user terminal can use the wireless access point device to perform various services such as voice. Technical problems of communication, and to a large extent guarantee the quality of business services;

In summary, the embodiments of the present invention are directed to a scenario in which a wireless access point device connects to a wireless user in a communication system with a small number of wireless users, and uses RTP multiplexing or UDP multiplexing to reduce the amount of data sent, improve transmission efficiency, and satisfy multiple users simultaneously. Improve the quality of service by using the needs of the business.

The data transmission and reception method and the wireless access point device, the gateway, and the communication system provided by the present invention are described in detail by using specific embodiments. The description of the above embodiments is only for helping to understand the method and the idea of the present invention. At the same time, the content of the present invention is not limited by the scope of the present invention.

Claims

Claim

A data transmission method, comprising:

Step B1: Configuring a payload of at least two of the packet payload, the packet header, and the corresponding service flow identifier to multiplex the packet;

2. The data transmitting method according to claim 1, wherein

The step A1 includes: adding a corresponding service flow identifier to the real-time transport protocol compression header, the packet header, and the packet payload of the circuit switched domain service data transmitted between the wireless access point and the access gateway, The user to which the message belongs and the length of the message;

The step B1 includes: multiplexing at least two of the packet payload, the packet header, the real-time transmission protocol compression header, and the corresponding service flow identifier as the payload of the user data packet protocol data packet;

The step C1 includes: transmitting the multiplexed user data packet protocol data packet.

3. The data transmitting method according to claim 2, wherein: the step of: real-time transmission protocol compression header for the circuit switched domain service data transmitted between the wireless access point and the access gateway, The corresponding service flow identifiers are added before the header and the payload, including:

Selecting at least two circuit switched domain service data under the same wireless access point, and adding a corresponding service flow identifier to the selected real-time transport protocol compression header, the packet header, and the packet payload of each service data; or

Selecting at least two circuit switched domain service data whose destination address is the same wireless access point, And adding a corresponding service flow identifier before the real-time transport protocol compression header, the packet header, and the packet payload of each selected service user data.

The data transmitting method according to claim 2, wherein the circuit switched domain service data is voice service data or video telephony service data;

The identifier of the service flow to which the packet belongs and the length of the packet include:

The service stream identifier to which the message belongs is identified by a partial bit of the three bytes, and the other bits identify the length of the message.

The data transmission method according to claim 2, wherein the circuit switched domain service data is adaptive multi-rate AMR voice service data or video telephony service data; and the multiplexed user data packet is sent. The steps of the protocol packet include:

The multiplexed AMR voice service data or video telephony service data is encapsulated into UDP/IP and the underlying protocol, and transmitted through the client device, the central office device, and the IP network.

6. A data receiving method, comprising:

Step B2: parsing the multiplexed data from the data packet;

7. The data receiving method according to claim 6, wherein:

The step A2 includes: receiving a circuit switched domain service user data packet protocol data packet multiplexed by a user data packet protocol transmitted between the wireless access point and the access gateway;

The step B2 includes: parsing the multiplexed data from the data packet; the step C2 includes: demultiplexing each user data from the multiplexed data a service flow identifier, a real-time transport protocol compression header, and a header, where the service flow identifier marks a user to which the text belongs and a length of the packet;

The step D2 includes: obtaining, according to the service flow identifier, a message payload corresponding to the length of the user and the packet.

The data receiving method according to claim 7, wherein: the step of: receiving circuit switched domain service user data multiplexed by a user data packet protocol transmitted between a wireless access point and an access gateway The message protocol data packet includes:

Receiving a circuit switched domain service user data packet protocol data packet multiplexed by a user data message protocol from a wireless access point;

The step of: obtaining a message payload corresponding to the user and the packet length further includes:

Encapsulating the real-time transport protocol compression header, the packet header, and the packet payload of each user into each data packet;

Sending the encapsulated data packet.

The data receiving method according to claim 8, wherein the circuit switched domain service data is adaptive multi-rate AMR voice service data or video telephony service data; and the step of: receiving from a wireless access point The circuit switched domain service user data packet protocol data packet multiplexed by the user data message protocol includes:

Receiving a circuit switched domain service user data packet protocol data packet multiplexed by a user data message protocol transmitted from a wireless access point through a client device, a central office device, and an IP network.

Receiving circuit switched domain service users from the access gateway and multiplexed by user data message protocol Data packet protocol data packet;

The circuit switched domain service data is adaptive multi-rate AMR voice service data or video telephony service data;

The step of: receiving a circuit switched domain service user data packet protocol data packet from an access gateway and multiplexed by a user data packet protocol includes:

Receiving a circuit switched domain service user data packet protocol data packet multiplexed by the user data packet protocol from the access gateway through the IP network, the central office device, and the client device.

The data receiving method according to claim 7, wherein the circuit switched domain service is a voice service or a video telephony service, and the step of: obtaining, according to the service flow identifier, the corresponding user and the packet The length of the message payload includes:

Determining the length of the packet according to the other bits of the three bytes, and obtaining the packet payload of the length according to the part of the service stream identifier that is three bytes in length. .

12. A wireless access point device, comprising:

a first marking unit, configured to add a corresponding service flow identifier before the packet header and the message payload of the circuit switched domain service data, and mark the length of the user to which the packet belongs and the length of the packet;

The wireless access point device according to claim 12, wherein the first marking unit is specifically configured to compress a header, a header, and a payload before the real-time transport protocol for the circuit switched domain service data. Add a corresponding service flow identifier, and mark the length of the user to which the message belongs and the length of the message; The first multiplexing unit is configured to multiplex the packet payload, the packet header, the real-time transport protocol compression header, and the respective service flow identifiers added by the first marking unit by at least two users, As the payload of the User Datagram Protocol packet;

The first sending unit is specifically configured to send the user data packet protocol data packet output by the first multiplexing unit.

14. The wireless access point device of claim 12 or 13, further comprising:

a first receiving unit, configured to receive a circuit switched domain service real-time transport protocol data packet multiplexed by the real-time transport protocol from the access gateway or a circuit-switched domain service user data packet protocol data packet multiplexed by a user data packet protocol ;

a first parsing unit, configured to parse the real-time transport protocol multiplexed data or the user data packet protocol multiplexed data from the data packet received by the first receiving unit;

a first demultiplexing unit, configured to parse a service flow identifier and a packet header of each user data from the multiplexed data output by the first parsing unit, where the service flow identifier marks a user to which the packet belongs The packet payload is obtained, and the packet payload corresponding to the length of the user and the packet is obtained according to the service flow identifier.

15. An access gateway, comprising:

a selecting unit, configured to select a circuit switching domain service data packet whose destination address is different receiving users of the same wireless access point;

a second marking unit, configured to add a corresponding service flow identifier to the packet header and the message payload of the data packet selected by the selecting unit, and mark the user to which the packet belongs and the length of the packet;

a second multiplexing unit, configured to multiplex the message payload of the at least two users, the packet header, and the respective service flow identifiers added by the second marking unit, as a real-time transport protocol data packet or user data. The payload of the message protocol packet; And a second sending unit, configured to send a real-time transport protocol data packet or a user data packet protocol data packet output by the second multiplexing unit.

16. The access gateway of claim 15 wherein:

The selecting unit is specifically configured to select a circuit switched domain service data packet whose destination address is different receiving users of the same wireless access point;

The second marking unit is specifically configured to add a corresponding service flow identifier to the real-time transport protocol compression header, the packet header, and the packet payload of the data packet selected by the selecting unit, and mark the user to which the packet belongs. And the length of the message;

The second multiplexing unit is specifically configured to multiplex the message payloads of the at least two users, the packet header, the real-time transport protocol compression header, and the respective service flow identifiers added by the second marking unit, as The payload of the User Datagram Protocol packet;

The second sending unit is specifically configured to send a user data packet protocol data packet output by the second multiplexing unit.

The access gateway according to claim 15 or 16, further comprising:

a second receiving unit, configured to receive a circuit switched domain service data packet multiplexed by a real-time transport protocol or multiplexed by a user data packet protocol from a wireless access point;

a second parsing unit, configured to parse the real-time transport protocol multiplexed data or the user data packet protocol multiplexed data from a data packet output by the second receiving unit;

a second demultiplexing unit, configured to demultiplex a service flow identifier and a packet header of each user data from the multiplexed data output by the second parsing unit, where the service flow identifier marks that the packet belongs to And the length of the packet, and the packet payload corresponding to the length of the user and the packet is obtained according to the service flow identifier.

The access gateway according to claim 17, further comprising: a first encapsulating unit, configured to compress the header and report the real-time transport protocol of each user data The header and message payload are encapsulated into their respective data packets;

The third sending unit is configured to send the encapsulated data packet.

A communication system, comprising: the wireless access point according to any one of claims 12 to 14, and the access gateway according to any one of claims 15 to 18.

20. The communication system according to claim 19, further comprising: an IP network serially connected between the first transmitting unit and the second receiving unit, a digital subscriber line access multiplexer DSLAM, and a non- Symmetric digital subscriber loop ADSL modem; or

An IP network, a cable modem head end system C M T S , and a cable modem are connected in series between the first transmitting unit and the second receiving unit.