WO2002015621A1

WO2002015621A1 - The method of carrying out tcp/ip service within mobile terminal of cdma communication system

Info

Publication number: WO2002015621A1
Application number: PCT/CN2000/000221
Authority: WO
Inventors: Ju Liu; Daoben Li
Original assignee: Linkair Communications, Inc.
Priority date: 2000-08-04
Filing date: 2000-08-04
Publication date: 2002-02-21
Also published as: AU2000262580A1; CN1378758A; CN1141851C; HK1050799A1

Abstract

In the mobile communication system, the RAN including terminal application program agent performs the transact of TCP/IP protocol cluster, MS is only the map of the agent application program, so as to greatly simplify the MS equipment. There are dynamic data pool in the RAN and the MS, so that the channel location of the air interface can be performed periodically according to the stored data amount and aiming at different users, thus improving the utilization ratio of the air interface radio resource.

Description

Method for implementing TCP / IP service in mobile terminal of code division multiple access communication system

The present invention relates to data services for mobile communications, and in particular, to a method for implementing TCP / IP services in a mobile terminal MS of a code division multiple access CDMA mobile communication system. Background technique

With the development of mobile communication networks, space interfaces are required to simultaneously support high-capacity voice and data services over a limited frequency band. With the formulation of the third generation mobile communication network standards, the data transmission rate of the mobile cell space interface has reached 2M or higher. The new generation of spread spectrum codes, multi-user detection, soft handover, smart antennas, software radio, and many other technologies Applications have made it possible for the space interface to implement high-capacity data services over a limited frequency band. Among them, TCP / IP services are an important part of data services and an important direction for the future development of wireless communication networks.

In the existing CDMA system, the implementation of the TCP / IP service in the space interface generally adopts two methods: One is to establish a fixed connection, which occupies fixed wireless resources. For example, in a CDMA TDD system, after a user applies for a TCP / IP service, the system may allocate a code channel of an uplink time slot and a code channel of a downlink time slot to the user for the transmission of TCP / IP services, up to this point. Service termination. The other is a packet connection, which is a form of datagram sharing channel. At this time, multiple users' IP datagrams share one channel. Because data services are bursty and non-real-time, the efficiency of packet connections is higher than that of traditional fixed connections. But when the data packet is small and the transmission frequency is high, the packet connection must be for each connection The transmission of a large amount of signaling is established on the spatial interface. Therefore, the spectral efficiency of these two methods on the spatial interface is not high. And because their transmission is based on IP datagrams, although header compression can be performed, the mobile terminal (hereinafter also referred to as MS) needs to be decompressed, and a complex TCP / IP protocol cluster processing process is required. Everything makes MS business processing functions more complicated. Therefore, it is not ideal to implement the TCP / IP service of the MS in a spatial interface based on the IP data. In fact, because MS cannot and does not have the processing power of a computer, while supporting voice services, it is limited to data services such as e-mail, Internet browsing, and e-commerce for data services. TCP / IP transmission methods designed for different applications are obviously not suitable. Summary of the invention

An object of the present invention is to provide a method for implementing TCP / IP services in a mobile terminal of a code division multiple access communication system, in which the MS is not responsible for the processing of the TCP / IP protocol cluster, and the processing of the TCP / IP protocol cluster is initiated and terminated at MS proxy application in Radio Access Network (hereinafter also referred to as RAN). MS contains the image of the application in the RAN. In the TCP / IP service, the MS and RAN transmit the application image data on the spatial interface. No IP datagrams are transmitted.

Preferably, the space interface radio resource transmits the application image data in a fixed period of time, and the space interface radio resource is reallocated according to the amount of data transmitted in each current sending cycle.

The advantage of the invention is that the MS does not need to have the processing capability of the TCP / IP protocol cluster to enjoy the TCP / IP service, so that the technical application of the TCP / IP protocol cluster and the space interface are related The separation improves the spectrum efficiency of the TCP / IP service space interface, and at the same time simplifies the equipment complexity required by the mobile station to support the TCP / IP service. Brief description of the drawings

In order to make the objectives, solutions, and advantages of the present invention clearer, the following describes the present invention in more detail with reference to preferred embodiments and the accompanying drawings.

FIG. 1 is a schematic block diagram of the implementation of the TCP / IP service of the MS in the first preferred embodiment of the present invention;

2 is a schematic diagram of implementing a downlink IP datagram to a dynamic data pool in a second preferred embodiment of the present invention;

FIG. 3 is a schematic diagram of a space interface implementing the present invention. Mode of Carrying Out the Invention

The idea of the present invention is that a proxy for the MS application is established in the radio access network RAN, and the MS only contains the image of the proxy application in the RAN. The TCP / IP service is initiated or terminated by the MS proxy application in the RAN according to the requirements of the MS. In this way, only the application image data needs to be transmitted on the spatial interface, so that the technical application of the TCP / IP protocol cluster is separated from the spatial interface.

Preferably, the radio resources of the space interface transmit the application image data in a fixed period of time, and reallocate the radio resources of the space interface according to the amount of data transmitted in each current sending cycle. Preferably, the period may be an integer multiple of a physical frame of a code division multiple access system.

Preferably, an application image is established in the RAN and the MS. Dynamic data pool, which stores application image data. MS and RAN transmit application image data on the spatial interface without transmitting IP datagrams. For the downlink, it is the application image dynamic data pool allocated to a specific MS in the RAN. Connection with this MS; for uplink, it is the connection between the application image dynamic data pool in the MS and the corresponding application proxy access point in the RAN.

Preferably, the dynamic data pool includes at least two storage sections, and each user who performs TCP / IP business services has a corresponding dynamic storage area in the two storage sections; The long time period is to periodically transmit data to the MS through the space interface and store the data to be transmitted in the next cycle. The space interface radio resources are reallocated according to the amount of data stored in each currently transmitted storage portion.

Please refer to FIG. 1, which is a schematic block diagram of an implementation scheme of a TCP / IP service of an MS in a CDMA system in a first preferred embodiment of the present invention. In a CDMA system, the TCP / IP protocol suite terminates or originates from a proxy of the MS application in the RAN, and the MS needs to include an image of the application in the RAN. For the downlink, the processing of the TCP / IP protocol suite of the MS ends at the proxy application in the RAN and is converted into application image data. All application image data is stored by the RAN (stored in a dynamic data pool), and the air wireless interface protocol is used to complete the data transmission with the MS. For the uplink, the application image data from the MS to the RAN will be sent out in the form of IP datagrams, as if the initiator is RAN, but the source address used is the IP address of this MS (assigned by RAN;) .

In this way, the implementation of the TCP / IP service can be divided into two phases: One phase is the service implementation between the MS proxy application in the RAN and the IP network, which is through the TCP / IP protocol. Clusters. The other stage is the business implementation between the RA agent application and the MS application image. The implementation method differs depending on the application and MS processing capabilities. Data transmission at this stage is performed through the access layer of the network space interface, and its reliability and confidentiality are guaranteed by the space interface protocol of the CDMA system.

The spatial interface connection between the RAN and the MS regarding TCP / IP services is no longer a connection based on the transmission of IP datagrams: For the downlink, it is the application image data pool in the RAN allocated to a specific MS and this MS Connection; for the uplink, the connection between the application image data pool in the MS and the corresponding application proxy access point in the RAN. The data transmission method is defined and implemented by the access layer of the space interface.

For the connection of RAN to other IP networks, the related TCP / IP technologies used are independent of the space interface. The IP address allocation, management, and movement of the MS are all performed by the RAN. The MS does not need to have any processing capabilities related to the TCP / IP protocol cluster.

In the RAN, a dynamic memory (ie, a dynamic data pool) is built for different mobile users. There is also a dynamic memory in the MS. The size of the memory is determined by the wireless network data capacity, the cycle of the dynamic allocation of the space interface channel, and the management method.

Regardless of whether it is in RA or MS, application image data may be compressed when it is stored in the dynamic data pool. After the spatial interface, the corresponding decompression is performed on the other side. Compression may have multiple formats depending on the application.

This patent is particularly applicable to CDMA TDD systems.

TCP / IP services are bursty and non-real-time. According to the non-real-time nature, the storage of application image data is performed periodically, and the cycle generally takes an integer multiple of the physical frame of the CDMA system. According to the burstiness, the wireless resources of the space interface are redistributed based on the storage period as the time unit and according to the current amount of data stored in the dynamic data pool. A storage cycle organizes a fixed connection. This can make full and reasonable use of wireless resources. Because the transmitted data does not include information about datagram headers in the TCP / IP protocol suite, the utilization of wireless resources is further improved. FIG. 2 is a schematic diagram of implementing a downlink IP datagram to a dynamic data pool in a second preferred embodiment of the present invention. For the downlink, IP datagrams to an application image data pool can be implemented by using the process shown in FIG. 2.

Figure 2 (1) uses IP datagrams as a unit to transmit and process according to the IP protocol. Figure 2 (2) The network layer and the transport layer are processed according to the TCP / IP protocol suite to provide services to the proxy application in the RA.

Figure 2 (3) The application image data is generated by the agent application. Application image data can be the visual interface of the application, or it can be a special data stream defined between the application agent and the application image in the MS. The way it is generated can vary depending on the application and MS processing capabilities. For example: MS has video-on-demand on the Internet. The application agent in RAN receives the video data transmitted from the Internet through the TCP / IP protocol cluster. This video data may be converted into data format before being stored in the application image data pool. To adapt to the player (possibly hardware) in MS. In this way, the MS does not need to have the processing capability of the TCP / IP protocol suite, and does not need to have a complicated operating system to enjoy specific TCP / IP business services. This process separates the general TCP / IP protocol suite from the space interface, so that different vendors can provide the MS with the required services on the space interface as needed.

Figure 2 (4) The application image data may be compressed and then sent to the dynamic data pool. The dynamic data pool is divided into two parts, A and B. Each user who performs TCP / IP business services There are corresponding dynamic storage areas in A and B respectively. When the data of A is being transmitted through the space interface, the data from the IP network is stored in B. When the data of B is being transmitted through the space interface, the data from the IP network is stored in A.

Figure 2 (5) The data in the dynamic data pool is periodically transmitted to the MS through the spatial interface. The cycle process is as (4). Therefore, in each cycle, the data transmitted on the spatial interface is the content stored in the dynamic data pool in the previous cycle, and the amount of data is a known fixed value.

The processing in virtual box C in Figure 2 is basically the same as the processing in MS, except that there is only one user in the dynamic data pool in MS. After the data in the MS dynamic data pool is transmitted through the spatial interface, it is processed by the proxy application in the RAN, and then sent through the transport layer, network layer, and link layer of the TCP / IP cluster. The application image data in the uplink may be the control command of the application. The generation of the application image data may vary according to the application and MS processing capabilities. FIG. 3 is a schematic diagram of a space interface implementing the present invention. From the dynamic data pool to the spatial interface, refer to Figure 3.

As shown in Figure 3, the data in the dynamic data pool belongs to the user data area. According to the amount of data to be transmitted by different MSs, the radio resource management layer is periodically notified of how to allocate radio resources; the allocation of air channels is also performed periodically, with the same period as the storage period. For the third generation wireless communication system, the storage period may take a length of 720 ras.

Similarly, for the uplink, the instruction or data stream is generated by the application image; the instruction or data stream is stored in the dynamic data pool of the MS; the uplink radio resources of the space interface are allocated synchronously and periodically as the downlink; Send to the corresponding service access point in the proxy application in the RAN through the wireless interface layer of the space interface; The application program performs processing of the TCP / IP protocol suite, and the IP address used is the IP address of the MS; the assignment, management, and movement of the MS's IP address are performed by the RAN. It is obvious and understood by those skilled in the art that the preferred embodiments of the present invention are only used to illustrate the present invention, and are not intended to limit the present invention. The technical features in the embodiments of the present invention may be arbitrarily combined. Without departing from the idea of the present invention. According to the method for dynamically allocating communication channels disclosed in the present invention, there are many ways to modify the disclosed invention, and in addition to the above-mentioned preferred modes specifically given, the present invention may have many other embodiments. Therefore, any method or improvement that can be obtained according to the concept of the present invention should be included in the scope of rights of the present invention.

Claims

Claim

1. A method for implementing a TCP eight-P service in a mobile terminal of a code division multiple access communication system, characterized in that the MS is not responsible for the processing of the TCP / IP protocol cluster, and the processing of the TCP P protocol cluster is initiated and terminated in the RAN MS proxy application, MS contains the image of the application in the RAN. In the TCP eight-P service, the MS and RAN transmit the application image data on the spatial interface without transmitting the IP datagram.

2. The method according to claim 1, wherein the radio resources of the space interface transmit the application image data in a fixed period of time, and the space interface transmits the amount of data transmitted to the space interface in each current sending cycle. Radio resources are reallocated.

3. The method according to claim 2, wherein the period is an integer multiple of a physical frame of a code division multiple access system.

4. The method according to claim 1, wherein an application image dynamic data pool is established in the RAN and the MS, and the application image data is stored, and the MS and the RAN interface in space. The application image data is transmitted without IP datagrams. For the downlink, it is the application image data pool allocated to a specific MS in the RAN and the connection between this MS. For the uplink, it is the application image in the MS. The connection between the data pool and the corresponding application proxy access point in the RAN.

5. The method according to claim 4, wherein the dynamic data pool includes at least two storage sections, and each user who performs TCP / IP business services has corresponding dynamics in the two storage sections, respectively. Storage area; the two storage parts alternately transmit data to the MS through the space interface with a fixed period of time as a cycle, and store data to be transmitted in the next cycle, and the space interface wireless resource The amount of data stored is redistributed.

6. The method according to claim 1, wherein, when the application image data is transmitted on the space interface, it is performed through an access layer of the space interface, and the reliability and confidentiality are determined by the space interface protocol. Guarantee.

7. The method according to claim 1, wherein the assignment, management, and movement of the IP address of the MS is performed by a RAN.

8. The method according to claim 1, wherein the application image data in the RAN and / or MS can be compressed when stored in a dynamic data pool, and then performed by the other party through a spatial interface. Decompress accordingly.