CN101232495A - The Architecture of the Protocol Stack of the Wireless Communication System and Its Information Interaction Method - Google Patents

Abstract

The present invention provides a protocol stack architecture of a mobile communication system and an information interaction method thereof. The architecture mainly includes: CCM (Convergence Convergence Control Management) layer: located at the top layer of the protocol stack, used for executing and communicating with various RAT (wireless Access technology) related public control; generate decision results according to the received general event types or information types, and deliver the decision results; abstraction layer: used to shield the differences between various RATs of the lower layer; will obtain The information of various RATs is converted into common event types or information types and reported; the received decision results are sent to the corresponding lower layers of various RATs. The present invention solves the problem that there is no clear protocol stack architecture in an environment where multiple access technologies coexist.

Description

The Architecture of the Protocol Stack of the Wireless Communication System and Its Information Interaction Method

technical field

The present invention relates to the field of wireless communication, in particular to a structure of a protocol stack of a wireless communication system and an information interaction method thereof.

Background technique

With the rapid development of high-speed network technology and multimedia technology, the development of wireless network is very fast. Wireless network gradually evolves from circuit switching to packet switching, and various wireless broadband access technologies emerge in endlessly. At present, the main wireless networks are GSM (Global System for Mobile, Global System for Mobile Communications), GPRS (General Packet Radio Service, General Packet Radio Service), WCDMA (Wideband Code Division Multiple Access, Wideband Code Division Multiple Access), CDMA ( code division multiple access, code division multiple access) 2000, WiMAX (Worldwide Interoperability Microwave Access, global interoperability of microwave access), B3G (The third Generation Mobile Communication third-generation mobile communication system) or 4G (The forth Generation Mobile Communication Fourth generation mobile communication system) and other wireless access systems.

With the development of wireless networks, various wireless technologies emerge in an endless stream, such as OFDM (orthogonal frequency division multiplexing) technology, relay station technology, access network fusion technology, spectrum sharing technology and multiple modes of physical layer technology, etc. . From the user's point of view, users hope that the communication system can provide ubiquitous, personalized, safe and reliable services, and can receive the meaningful services they predetermined through any available access means anywhere. In order to realize the requirements of the above-mentioned users, it is necessary to realize the seamless mobility among the above-mentioned multiple wireless technologies.

The protocol is the basis of communication. The protocol forms a group of hierarchical, interrelated and functional protocol combinations through organization. The protocol combination can be called the protocol architecture or protocol stack. In order to ensure that the requirements of the above-mentioned users can be met in the B3G or 4G system, it is necessary to determine a protocol stack in a heterogeneous environment, which is a wireless communication system under multiple radio access technologies, and can even be a variety of independent Wireless communication systems using different communication protocols.

The implementation scheme of the protocol stack under the first multi-radio access technology in the prior art is as follows: the WLAN (Wireless Local Area Network , wireless local area network) system interconnection, but because the system design between WLAN and 3GPP or 3GPP2 is completely independent, their protocol stack architecture is completely independent and the two sets of protocols simply coexist. Therefore, a loose coupling method is adopted between WLAN and 3GPP or 3GPP2, that is, the protocol stacks of their respective control planes are completely independent, and only the authentication authorization and accounting server of the 3GPP or 3GPP2 system is borrowed in the WLAN system , borrowing the boundary gateway between the 3GPP or 3GPP2 system and the external PDN (PacketData Network, packet data network) (such as the GGSN in the 3GPP or the PDSN in the 3GPP2 system), and then the data can be realized between the WLAN and the 3GPP or Handover between radio access technologies such as 3GPP2.

The disadvantages of the implementation scheme of the protocol stack under the first multi-access technology in the above-mentioned prior art are:

1. Since there is no coordination and processing between access technologies between WLAN and 3GPP or 3GPP2, the handover process will be equivalent to the initial network access process, and a series of synchronization, selection, authentication and authorization of cells and networks need to be re-performed The process of initial network access, which will lead to a large transmission delay, the increase of delay will make it impossible to achieve business continuity, and ultimately cannot achieve seamless mobility between different access technologies;

2. WLAN cannot be organically combined with two independent protocol stacks in 3GPP or 3GPP2, and cannot make full use of some user context information before switching to optimize switching during the switching process;

3. It cannot support seamless handover between different systems, as well as multi-radio resource management functions such as admission control, load sharing, and congestion control under the coexistence of multiple radio access technologies, and other public control and management functions.

The implementation scheme of the protocol stack under the second multi-access technology in the prior art is: the interconnection between the existing 3GPP system and the existing 3GPP system is set in the 3GPP evolution system, and the interconnection relationship between the existing 3GPP system and its evolution system is mainly It is: the existing 3GPP GPRS Core (GPRS core) is responsible for the control and management of mobile terminals accessing its access network UTRAN (Universal Terrestril Radio Access Network, Universal Terrestrial Radio Access Network); and the evolution of the 3GPP evolution system The packet core network EPC (Evolved Packet Core) is responsible for the control and management of mobile terminals accessing the evolved 3GPP access network, and the MME (Mobile Management Entity) is responsible for completing this function, and requires MME and GPRS The amount of information exchanged between Cores is rich enough to meet the requirements of distributed existing and evolving 3GPP access networks.

The disadvantages of the implementation scheme of the protocol stack under the second multi-access technology in the above-mentioned prior art are:

1. Access network resource usage information, signal quality and other information used to support public control and management functions such as handover still cannot be fully shared between the 3GPP system and its evolved system;

2. The two independent protocol stacks in the 3GPP system and its evolution system cannot be combined organically, and there is no mechanism for optimizing the handover by making full use of some user context information before the handover;

3. It cannot fully support seamless switching between different systems. This solution uses 3GPP system-specific messages between GPRS Core and EPC, and cannot be extended to public control and management between 3GPP systems and non-3GPP systems.

The implementation scheme of the protocol stack under the third multi-access technology in the prior art is: In order to realize the seamlessness and continuity of the handover, IEEE802.21 introduces a new MIHF into the existing mobility management protocol stack (Media Independent Handover Function, Media Independent Handover Protocol Functional Layer) entity, the MIHF entity completes the underlying performance and event monitoring to a certain extent; manages and controls link behavior and other functions. The MIHF entity mainly provides the following services to help users in the handover process:

MIH Event Service (MIES): Provides event classification, event filtering, and event reporting for dynamically changing events on link characteristics, link status, and link quality.

MIH Command Service (MICS): Provides MIH user management and control of link behavior related to handover and mobility.

MIH Information Service (MIIS): Provides detailed information on the characteristics and services of the serving network and surrounding networks, which are used for efficient system access and handover decisions.

The location and key services of MIHF entities are shown in Figure 1. The MIHF entity is logically defined as a thin layer in the mobility management protocol stack of the terminal and the network, and acts as an assistant and booster in handover decisions. For terminals that support multi-mode and multi-wireless access, provide the upper layer with some necessary information to make handover decisions and how to effectively make handover decisions. The upper layer makes handover decisions and link selections based on MIHF input and context, so that seamless switch.

In addition, IEEE802.21 also defines a media-independent switching protocol, mainly describing the following procedures:

MIH capability discovery: The MIHF of the terminal or network discovers which entity supports the MIH function and to what extent.

MIH remote registration: MIHFs of different network elements can register with each other to receive media-independent handover messages, including remote events.

MIH message exchange: The MIHF at both ends can use the MIH protocol to interact through appropriate transmission methods. The protocol specifies the packet format, message format and message interaction process.

The disadvantages of the implementation scheme of the protocol stack under the third multi-access technology in the above-mentioned prior art are as follows:

1. This solution only considers the initial and preparation mechanism of handover, and does not provide enough mechanisms for the actual handover judgment and handover execution; the process of supporting the handover function is incomplete;

2. For the service of the upper layer, this solution is only the mobility protocol of the upper layer, such as mobile IP, IP or host identification protocol (HIP), etc., and does not fully consider how to combine all functional entities of the public control and management of the upper layer with the lower layer or with the Taking into account the communication and control of the peer end, it is impossible to realize public control and seamless switching in a multi-wireless access environment from the mechanism;

3. The solution does not have a clear protocol stack architecture, and it is impossible to determine a group of hierarchical, interrelated protocol combinations that achieve certain functions;

4. This solution does not provide a data interaction method between the data plane and the control plane; it does not provide a practical mechanism for practical applications.

The implementation scheme of the protocol stack under the fourth multi-access technology in the prior art is as follows: this scheme proposes network selection under the environment of multi-access technology, session establishment of multi-access technology, and distributed architecture of multi-protocol, etc. some methods. Mainly from the function distribution, the concept that both single access technology and multi-access control functions must exist, there will be coordination and processing between single-access technology and multi-access technology control function entities, and finally realize related function.

The disadvantages of the implementation scheme of the protocol stack under the fourth multi-access technology in the above-mentioned prior art are as follows:

1. This solution only introduces some methods from the functional realization process, that is, it only involves the mobile terminal, the AP (Access Point, access point) (base station, etc.) of the specific access technology, the control node of the specific access technology and the public Control nodes and the information interaction between them; in fact, it does not involve how to realize this information interaction, as well as the specific functional protocol stack architecture, etc.;

2. The solution does not involve any content related to access technology, access system protocol stack, etc.;

3. This solution does not consider supporting seamless switching between different systems, public control and management, and message interaction in a multi-radio access technology environment, nor does it provide a general and flexible mechanism to realize various access systems , Different commercial operation environments (cooperation or competition), and different system evolution levels ensure the realization of public control and management functions for seamless mobility.

The implementation scheme of the protocol stack under the fifth multi-access technology in the prior art is as follows: this scheme proposes a realization method of a (mobile) terminal device having a multi-access technology interface. This scheme equips a wireless terminal with two or more radio transceivers statically tuned to non-interfering frequency channels, which can decide which frequency channel to use when communicating with neighboring wireless nodes. The Multiradio Unified Protocol implemented in the wireless node coordinates the use of multiple wireless network interface cards and provides a virtualization layer that hides the higher layers of the protocol stack for multiple physical network interfaces. Makes it possible to transmit simultaneously using available channels, reducing interference and latency while increasing the overall capacity of the network. This solution is mainly aimed at the case that the terminal or the host has multiple wireless access interfaces, and discovers possible multiple wireless access interfaces of the peer node through periodical signal quality estimation and selection of the peer node.

The disadvantages of the implementation scheme of the protocol stack under the fifth multi-access technology in the above-mentioned prior art are:

1. Although this solution provides a virtual layer to hide the differences of various wireless technologies in the lower layer from the layer above the virtual layer, it ensures the independence of the evolution of the upper layer and the evolution of the lower layer wireless access technology. However, the upper-layer service is only a multi-radio unified protocol, and does not fully consider how to take into account the communication and control of all functional entities of the upper-layer public control and management with the lower layer or with the peer end, and cannot realize the multi-radio access environment from the mechanism public control and seamless handover; and it is only a method provided for how to discover multiple wireless access interfaces of the peer communication node;

2. The solution does not have a clear protocol stack architecture, and it is impossible to determine a group of layered, interrelated protocol combinations that realize certain functions;

3. This solution does not provide a data interaction method between the data plane and the control plane; it does not provide a practical mechanism for practical applications.

Contents of the invention

Embodiments of the present invention provide a protocol stack architecture of a wireless communication system and an information interaction method thereof. This solves the problem that there is no clear protocol stack architecture in an environment where multiple access technologies coexist.

Embodiments of the present invention are achieved through the following technical solutions:

A protocol stack architecture of a mobile communication system, characterized in that it includes: a fusion convergence control management CCM layer and an abstraction layer, wherein,

CCM layer: Located at the top layer of the protocol stack, it is used to perform public control related to multiple radio access technologies RAT; generate decision results according to received general event types or information types, and issue decision results;

Abstraction layer: used to shield the differences between various RATs in the lower layer; convert the obtained information of various RATs into common event types or information types and report them; send the received decision results to the corresponding RATs of various RATs lower level.

An information interaction method of a protocol stack of a mobile communication system, comprising:

The protocol stacks of the mobile communication system are respectively established on different communication entities, and the different communication entities use the protocol stacks for information exchange, and the protocol stacks include: a CCM layer and an abstraction layer, wherein,

CCM layer: Located at the top layer of the protocol stack, it is used to perform public control related to multiple RATs; generate decision results according to received general event types or information types, and issue decision results;

Abstraction layer: used to shield the differences between various RATs in the lower layer; convert the obtained information of various RATs into common event types or information types and report them; send the received decision results to the corresponding RATs of various RATs lower level.

It can be seen from the above technical solutions provided by the embodiments of the present invention that the embodiments of the present invention provide a protocol for a wireless communication system under multiple access technologies, especially multiple wireless access technologies or multi-mode access technologies. The architecture of the protocol stack, and determined the network access, selection, handover, paging, data routing, mobility management, QoS (Quality of Serice, quality of service) negotiation and management, authentication and authorization authentication, network Various functions such as dynamic combination.

The above technical solution provided by the embodiment of the present invention supports common control and management of multiple radio access technologies; it can adapt to different development stages of various systems such as traditional systems, evolution of traditional systems, and new systems at the same time, and control plane signaling messages The transmission mode is flexible and diverse, providing a flexible and diverse implementable protocol stack system; through the introduction of the abstraction layer, the coupling degree between the upper public control and management and specific access technologies is reduced.

Description of drawings

FIG. 1 is a schematic diagram of the location and key services of MIHF entities in the prior art;

FIG. 2 is a schematic structural diagram of a protocol stack of a wireless communication system according to an embodiment of the present invention;

FIG. 3 is a processing flow for information interaction between different communication entities through the CCM layer provided by an embodiment of the present invention;

FIG. 4 is a processing flow for information interaction between different communication entities through an abstraction layer according to an embodiment of the present invention;

FIG. 5 is a processing flow for information interaction between different communication entities through the L3 layer provided by an embodiment of the present invention;

FIG. 6 is a processing flow for remote network information acquisition and event reporting through CCM layer information interaction provided by an embodiment of the present invention;

FIG. 7 is a processing flow for remote network information acquisition and event reporting through abstraction layer information interaction provided by an embodiment of the present invention;

FIG. 8 is a processing flow for remote network information acquisition and event reporting through L3 layer information interaction provided by an embodiment of the present invention;

FIG. 9 is a processing flow for reporting a remote event through abstraction layer information interaction provided by an embodiment of the present invention.

Detailed ways

Embodiments of the present invention provide a protocol stack architecture of a wireless communication system and an information interaction method thereof.

A schematic structural diagram of a protocol stack of a wireless communication system according to an embodiment of the present invention is shown in FIG. 2 . The structure of the protocol stack includes in order from top to bottom: CCM (Converged Control Management, Convergence Convergence Control Management) layer, abstraction layer, CLL (Convergence Link-layer, Convergence Link Layer) layer, access technology-specific L3 ( Layer 3), L2 (Layer 2) and PHY (Physical Layer, physical layer).

The detailed description of the functions of each layer of the above protocol stack is as follows:

CCM layer: Located at the top layer of the protocol stack, it is used to perform common control functions related to multiple access technologies. The control function at least includes: mobility management of terminals under multiple access technologies, radio resource management of terminals under multiple access technologies, terminal access control of terminals under multiple access technologies, congestion control of terminals under multiple access technologies, Multi-hop relay negotiation between different networks, service authentication and authorization between different networks, security guarantee between different networks, QoS negotiation and implementation between different networks, system configuration between different networks, and terminal One of the features such as software updates and upgrades. Among them, parts such as service authentication and authorization, security guarantee, QoS negotiation and realization can also be handled by the upper layer protocol.

The CCM layer receives the general event type or information type reported by the abstraction layer, takes the general event type or information type as a decision factor, generates a decision result according to the decision factor, and sends the decision result to the abstraction layer. Therefore, the CCM layer only needs to pay attention to specific policies, and does not need to deal with specific details of events. Such a protocol stack architecture is also easy to expand and accommodate new types of radio access technologies.

The above-mentioned CCM can be used as a common control entity, or this function can be implemented in a distributed manner.

Abstraction layer: It is used to shield the differences between various access technologies of the lower layer, and hide the specific L3 layer, L2 layer and physical layer of multiple access technologies of the lower layer. The abstraction layer provides services to the upper layer through a technology-independent interface, and obtains lower layer services through a series of interfaces related to various access technologies. The abstraction layer does not negate (discard) the internal processing mechanisms and interfaces of various access technologies, but adopts a unified middle layer to encapsulate various access technologies of the lower layer.

After the abstraction layer receives the command issued by the CCM layer, it calls the corresponding media-specific L3 (layer 3) or L2 (layer 2) or L1 (layer 1) primitive according to the different access technologies of the lower layer, and the primitive sent to the lower layer. Various information about the lower layer, such as dynamic change events of link characteristics, link status, and link quality, are translated into common event types or information types by the abstraction layer, and reported to the CCM layer.

In addition, through the interaction between the abstraction layers between different entities, the service and characteristic details of the required surrounding network can be obtained from the current service network without accessing other types of surrounding networks. Make effective policy decisions at the CCM layer.

If all wireless communication systems in the future can support public control and management provision, required interfaces, signaling formats, and can identify and process public control and management messages, the abstraction layer may not be needed.

CLL layer: converts packet datagrams (such as IP datagrams, ATM datagrams, etc.) sent by the upper layer into RAT (radio access technology) specific data formats, and sends them to the lower layers corresponding to various RATs. In order to facilitate better transmission on the wireless link, at the same time at least complete the implementation of RAT-specific QoS (Quality of Service), storage of datagrams, forwarding of datagrams, segmentation of datagrams, reassembly of datagrams (if necessary), etc. one of the functions. It is also responsible for converting various RAT-specific data formats received by the lower layer into packet data packets of the upper layer, and sending them to the upper layer.

The specific L3 layer, L2 layer and physical layer functions of the access technology under the mobile communication system described in the embodiment of the present invention are different from existing WCDMA (Wideband Code Division Multiple Access, wideband code division multiple access), CDMA (Code Division Multiple Access, Code Division Multiple Access) 2000, WiMAX (Worldwide Interoperability for Microwave Access, Microwave Access Global Interoperability) and other systems are the same,

L3 layer: mainly responsible for the control, scheduling, etc. of wireless resources under the mobile communication system described in the embodiment of the present invention, as well as functions such as control, measurement, and management of the L2 layer and the physical layer. These include: terminal connectivity management, terminal mobility management, terminal access control, congestion control, radio resource management and other functions. If necessary, it can also perform functions such as multi-mode coordination and switching, resource allocation and scheduling of relay stations, and the like.

Using the structure of the protocol stack described in the above-mentioned embodiments of the present invention, the description of the mobile communication system for local control and management is as follows:

The upper layer (CCM layer) can adapt primitives through the abstraction layer, so as to implement information acquisition service, command service or event service for the RAT-specific L3 layer, L2 layer and physical layer.

For a new wireless access technology, considering that the technology can identify and execute the functions indicated by the upper layer primitives, the upper layer can directly interact with the local RAT-specific L3, L2 and physical layer without the adaptation of the abstract layer .

Using the structure of the protocol stack described in the above-mentioned embodiments of the present invention, the description of the remote control and management of the mobile communication system is as follows:

The local upper layer (CCM layer) can directly send messages to the peer upper layer (CCM layer) through the data plane, and start local control management through the peer upper layer (CCM layer) to realize message interaction;

Triggered by the local CCM layer or the bottom layer, the local abstraction layer sends the abstraction layer message to the peer abstraction layer through the data plane transmission, and then according to the message type, the peer abstraction layer sends the peer RAT-specific L3, L2 Interact with the physical layer or the upper layer of the peer (CCM);

In addition, the local upper layer (CCM layer) can be adapted as a RAT-specific L3 message through the local abstraction layer, and sent to the peer RAT-specific L3 layer. Interact with the physical layer or through the peer abstraction layer and the upper layer (CCM layer).

Utilizing the structure of the protocol stack described in the above-mentioned embodiments of the present invention, the mobile communication system processes the data plane as follows:

The CLL layer converts the upper-layer IP datagram into a RAT-specific data format for better transmission on the wireless link, and at the same time completes functions such as QoS implementation, datagram storage, forwarding, segmentation, and reassembly (if necessary). And it is responsible for converting various RAT-specific data formats received by the lower layer into the packet data message form of the upper layer.

Using the architecture of the protocol stack described in the above embodiments of the present invention, information exchange can be performed between various communication entities. The information exchange may be information exchange between CCM layers of the protocol stack, between abstraction layers or between L3 layers of a specific RAT. The above information interaction can be the information interaction in the process of cross-system or switching between various modes, spectrum sharing or load sharing; it can also be the information interaction in the process of remote control command interaction and execution between the mobile terminal and the mobile communication system ; It can also be the information exchange in the remote event reporting process between the mobile terminal and the mobile communication system.

A processing flow of information exchange between different communication entities through a CCM layer provided by an embodiment of the present invention is shown in FIG. 3 .

In this embodiment, the CCM layers on the local and peer communication entities can communicate directly, and the management and control messages of the local CCM layer are adapted as the data carried by the lower-layer specific radio access technology after being adapted by the CLL layer of the data plane. Then, the management control message is directly sent to the CCM layer of the opposite end. The specific processing process includes the following steps:

Step 31, the CCM layer of the terminal receives some trigger events that may cause handover, and decides to trigger the initial handover process.

Step 32: After the management control message of the CCM layer of the terminal is adapted through the CLL layer of the data plane, the adapted management control message is used as the data carried by the lower layer specific radio access technology. Then, the terminal sends a handover negotiation message to the CCM layer in its original serving wireless communication system, and the terminal starts to negotiate handover matters with its original serving wireless communication system.

Step 33: The CCM layer of the original serving wireless communication system of the terminal negotiates handover with the CCM layer of the target wireless communication system through CCM message exchange. At this time, the original serving wireless communication system of the terminal may contact and negotiate with multiple target wireless communication systems.

Step 34, the CCM layer of the target wireless communication system feeds back the handover negotiation result to the CCM layer of the original serving wireless communication system.

Step 35, the CCM layer of the original serving wireless communication system returns the negotiation result to the CCM layer of the terminal.

Step 36. The terminal makes a corresponding handover decision according to the received negotiation result. After the terminal decides to perform handover, the terminal deletes its wireless link with the original serving wireless communication system, and establishes a wireless link with the selected target wireless communication system. .

Some of the above steps may be repeated multiple times, or there may be multiple message interactions to finally determine whether to perform the switch.

A processing flow of information interaction between different communication entities through an abstraction layer provided by an embodiment of the present invention is shown in FIG. 4 .

This processing flow is mainly aimed at how to realize the switching flow between multiple wireless access technologies when the original serving wireless communication system has not been fully upgraded to support the CCM layer. This processing flow requires that the wireless communication system can provide an abstraction layer for approximate processing and message forwarding, and through the abstraction layer, the peer-to-peer messages sent by the terminal or other systems can be sent to the lower layer access technology-specific L3 layer and other lower layers for correlation negotiation and processing.

This processing flow mainly includes the following processing steps:

Step 41, the CCM layer of the terminal receives some trigger events that may cause handover, and decides to trigger an initial handover process.

Step 42, the CCM layer of the terminal sends the handover negotiation message to the local abstraction layer, and notifies the local abstraction layer to perform corresponding processing.

Step 43: After the management control message of the abstract layer of the terminal is adapted by the CLL layer, the adapted management control message is used as the data carried by the lower layer specific radio access technology. Then, the terminal sends a handover negotiation message to the abstraction layer in its original serving wireless communication system, and the terminal starts to negotiate handover matters with its original serving wireless communication system.

Step 44, after the abstraction layer of the original serving wireless communication system and the upper and lower layers of the system perform possible processing (here, it is assumed that the CCM layer in the original serving wireless communication system is temporarily unavailable, and only the abstraction layer can perform simple processing and forwarding of messages ), through the message interaction between the abstraction layers and the abstraction layer of the target system to negotiate switching matters (here may be in contact with multiple target systems).

Step 45, the abstraction layer of the target wireless communication system submits the handover negotiation message to the CCM layer of the target wireless communication system for processing.

Step 46: The CCM layer of the target wireless communication system feeds back the handover negotiation result to the abstraction layer of the target wireless communication system.

Step 47, the abstraction layer of the target wireless communication system feeds back the handover negotiation result to the abstraction layer of the original serving wireless communication system.

Step 48, the abstraction layer of the original serving wireless communication system returns the negotiation result to the abstraction layer of the terminal.

Step 49, the abstraction layer of the terminal feeds back the handover negotiation result to the local CCM layer.

Step 410. The terminal makes a corresponding handover decision according to the received negotiation result. When the terminal decides to switch, the terminal deletes its wireless link with the original serving wireless communication system, and establishes a wireless link with the selected target wireless communication system. road.

A processing flow of information exchange between different communication entities through the L3 layer provided by the embodiment of the present invention is shown in FIG. 5 .

This processing flow is mainly aimed at how to implement the switching process between multiple wireless access technologies when the original service wireless communication system has not been fully upgraded to support the CCM layer. The management control messages of the CCM layer are adapted through the abstraction layer and converted into The upper-layer signaling format that can be carried by the L3 layer of a specific radio access technology (for example, the non-access stratum NAS message in 3GPP is carried on the radio resource control RRC signaling) or translated into a control message for the L3 layer. The message of the L3 layer will send the message to the L3 layer of the opposite end through the data carried by the lower layer specific RAT data plane. Then report to the relevant layer (layer 3, lower layer, abstraction layer or CCM layer) for negotiation and processing.

This processing flow mainly includes the following steps:

Step 51 , the CCM layer of the terminal receives some trigger events that may cause handover, and decides to trigger an initial handover process.

Step 52, the CCM layer of the terminal sends the handover negotiation message to the local abstraction layer, and notifies the local abstraction layer to perform corresponding processing.

Step 53 , the abstraction layer of the terminal notifies the local L3 layer that handover negotiation needs to be started (or notifies the L3 layer of the handover negotiation message as a message that the L3 layer can carry).

Step 54: The L3 layer of the terminal converts or translates the message into an L3 message of its own system, and sends the L3 message of its own system to the L3 layer of the original serving wireless communication system through a lower-layer specific wireless access technology bearer.

Step 55, the L3 layer of the original serving wireless communication system reports the received message to the abstraction layer of the system.

Step 56: The abstraction layer of the original serving wireless communication system reports the received message to the CCM layer of the system, and the CCM layer processes the handover negotiation message.

Step 57: The CCM layer of the original serving wireless communication system negotiates handover matters with the CCM layer of the target wireless communication system through direct message exchange. At this time, the original serving wireless communication system of the terminal may contact and negotiate with multiple target wireless communication systems .

Step 58, the CCM layer of the target wireless communication system feeds back the handover negotiation result to the CCM layer of the original serving wireless communication system.

Step 59: The CCM layer of the original serving wireless communication system notifies the abstraction layer of the system of the handover negotiation result, and requests the abstraction layer to feed back the handover negotiation result to the terminal.

Step 510, the abstraction layer of the original serving wireless communication system notifies the local L3 layer that it needs to return the handover negotiation result (or notify L3 of the handover negotiation feedback message as a message that can be carried by L3).

Step 511 , the L3 layer of the original serving wireless communication system converts or translates the message into an L3 message of its own system, and sends the L3 message of its own system to the L3 layer of the terminal through a lower-layer specific wireless access technology bearer.

Step 512, the L3 layer of the terminal reports the received message to the abstraction layer of the terminal.

Step 513, the abstraction layer of the terminal reports the received message to the CCM layer of the terminal, and the CCM layer processes the handover negotiation message.

Step 514, the terminal makes a corresponding handover decision according to the processing result of the CCM layer. After the terminal decides to perform handover, the terminal deletes its wireless link with the original serving wireless communication system, and establishes a wireless link with the selected target wireless communication system .

Utilizing the structure of the protocol stack described in the above-mentioned embodiments of the present invention, a processing flow of remote network information acquisition and event reporting through CCM layer information interaction provided by the embodiments of the present invention is shown in FIG. 6 .

This processing flow is mainly for command or information acquisition such as remote measurement. Similar to the handover process, direct communication between CCM layers can be used for remote commands or information acquisition of the upper CCM layer, and the CLL adaptation of the corresponding data plane can be used as the data carried by the specific wireless access technology of the lower layer. The corresponding message is sent to the opposite end; the CCM layer of the opposite end converts the received message into a local command service, and then sends the command service to the specific wireless access technology of the lower layer.

This processing flow mainly includes the following steps:

Step 61, the remote measurement command of the CCM layer of the remote service wireless communication system is adapted as the data carried by the lower layer specific radio access technology through the adaptation of the CLL layer. The CCM layer of the remote service wireless communication system sends the remote measurement command to the CCM layer of the terminal.

Step 62: After converting the received remote measurement command into a local link measurement command, the CCM layer of the terminal sends the link measurement command to the local abstraction layer, and notifies the abstraction layer to perform corresponding processing.

Step 63, the abstraction layer of the terminal notifies the specific local wireless technology L3 or L2 or L1, and it is assumed in this embodiment that the L2 or L1 layer is notified to perform related local link measurement.

Step 64, the L2 or L1 layer of the terminal reports the obtained link measurement result to the abstraction layer of the terminal.

Step 65, the abstraction layer of the terminal reports the received link measurement result to the local CCM layer.

Step 66: After the management control message of the CCM layer of the terminal passes through the adaptation of the CLL layer, the adapted management control message is used as the data carried by the specific wireless access technology of the lower layer, and the CCM layer of the terminal uses the above remote link measurement result Sent to the CCM layer of the remote service wireless communication system.

For the remote command or information acquisition of the upper layer CCM, the CCM message can also be adapted through the abstraction layer, and the message after the abstraction layer adaptation is adapted by the CLL layer of the data plane as the data carried by the specific wireless access technology of the lower layer , and then send the message to the abstraction layer at the opposite end, and the abstraction layer at the remote end converts it into a local command service and sends it to the specific wireless access technology at the lower layer.

A processing flow for remote network information acquisition and event reporting through abstraction layer information interaction provided by an embodiment of the present invention is shown in FIG. 7 . Including the following steps:

Step 71 , the CCM layer serving the wireless communication system notifies the local abstraction layer that remote measurement service needs to be performed.

Step 72: After the remote measurement command of the abstract layer of the serving wireless communication system is adapted by the CLL layer, the adapted remote measurement command is used as the data carried by the specific wireless access technology of the lower layer, and the serving wireless communication system converts the remote Measurement commands are sent to the abstraction layer of the peer terminal.

Step 73. The abstraction layer of the terminal sends the received remote measurement command to the local specific wireless technology L3 or L2 or L1. In this embodiment, it is assumed that the abstraction layer notifies L2 or L1, and L2 or L1 performs related local chaining. road measurement.

Step 71, the L2 or L1 of the terminal reports the link measurement result to the abstraction layer.

Step 75: After the abstraction layer of the terminal passes the link measurement result through the adaptation of the CLL layer, the adapted link measurement result is used as the data carried by the specific wireless access technology of the lower layer, and the link measurement result is sent to the opposite end An abstract layer entity that serves wireless communication systems.

Step 76: The abstraction layer of the serving wireless communication system notifies the local CCM layer of the remote measurement result.

The management control message of the CCM layer is adapted through the abstraction layer and converted into an upper-layer signaling format that can be carried by the L3 layer of a specific wireless technology (for example, the non-access stratum NAS message in 3GPP is carried on the radio resource control RRC signaling) Alternatively, the L3 control message is translated into a signaling message recognized by the L3 through the L3 and sent to the L3 at the end, and then sent to the lower layer for negotiation and processing. The L3 message will be sent to the peer L3 via the data carried by the data plane of the lower-layer specific radio access technology. (This embodiment is mainly for the processing of the measurement command of the remote wireless access technology L2 or L1, of course, it does not rule out the situation that the upper layer of the remote end needs to be processed.)

A processing flow for remote network information acquisition and event reporting through L3 layer information interaction provided by an embodiment of the present invention is shown in FIG. 8 . Including the following steps:

Step 81 , the CCM layer serving the wireless communication system sends a remote measurement command to the local abstraction layer, notifying the local abstraction layer that remote measurement services need to be performed.

Step 82, the abstraction layer of the serving wireless communication system sends the received remote measurement command to the local L3 layer, and notifies the local L3 layer that relevant remote measurement needs to be performed.

Step 83: The L3 layer of the serving wireless communication system converts or translates the received remote measurement command into an L3 message of its own system, and sends the L3 message of its own system to the L3 layer of the terminal through a lower-layer specific wireless access technology bearer .

Step 84, the L3 layer of the terminal sends a link measurement command to the specific local wireless technology L2 or L1, notifying the specific local wireless technology L2 or L1 that relevant local link measurement needs to be performed.

Step 85, L2 or L1 of the terminal reports the link measurement result to L3.

Step 86: The L3 layer of the terminal converts or translates the above link measurement results into an L3 message of its own system, and sends the L3 message of its own system to the L3 layer of the serving wireless communication system through a lower-layer specific radio access technology bearer.

Step 87: The L3 layer of the serving wireless communication system feeds back the received link measurement result to the local abstraction layer.

Step 88, the abstraction layer of the serving wireless communication system notifies the local CCM layer of the received remote measurement result.

According to the architecture of the protocol stack provided by the above embodiments of the present invention, the remote network information can also be obtained through the event service triggered actively by the lower layer.

In practical applications, there are three methods for reporting remote events:

1. The local event is reported to the local L3 layer through the local L2 or L1. The local L3 layer notifies the remote L3 peer entity of the event through the data bearer channel of the specific wireless access technology provided by the data plane, and then passes the abstract layer to the The event is notified to the remote CCM.

2. Local events are reported to the abstraction layer through the local L2 or L1, and then sent to the remote abstraction layer through the transmission channels of the above-mentioned various abstraction layer information (for example, CLL is adapted to be suitable for carrying data on the wireless access technology) , or through L3 conversion or translation of the access technology into a special message through the data bearer channel of the specific wireless access technology provided by the data plane to notify the remote L3 peer entity of the event and then to the remote abstraction layer), the remote The abstraction layer reports the results to the remote CCM layer.

3. The local event is reported to the abstract layer through the local L2 or L1, and then reaches the local CCM, and is sent to the remote CCM layer through the above-mentioned various CCM information transmission channels (for example, directly through CCL adaptation and CLL adaptation to become suitable The data carried on the wireless access technology, or through the abstraction layer and then converted to CLL to adapt to the data suitable for carrying on the wireless access technology, reaches the remote abstraction layer, and then uploads to the remote CCM, or through the abstraction layer Transform or translate the L3 of the access technology into a special message through the data bearer channel of the specific wireless access technology provided by the data plane to notify the remote L3 peer entity of the event and then to the remote abstraction layer and CCM layer).

A processing flow of remote event reporting through abstraction layer information interaction provided by an embodiment of the present invention is shown in FIG. 9 . Including the following steps:

Step 91 , the specific wireless technology L2 or L1 of the terminal notifies the local L3 layer of the event reporting information when the set event that needs to be reported occurs.

Step 92, the L3 layer of the terminal notifies the local abstraction layer of the received event reporting information.

Step 93, the local abstraction layer transmits the received event report information to the abstraction layer of the serving wireless communication system.

Step 94, the abstraction layer serving the wireless communication system sends the received event report information to the local CCM layer.

It can be seen from the above embodiments that, through the architecture of the protocol stack provided by the embodiments of the present invention, flexible and diverse control signaling interactions can be provided, and finally common control over various wireless access technologies can be realized.

Through the structure of the protocol stack and the information interaction method described in the above-mentioned embodiments of the present invention, the original functions of the wireless communication system under the single radio access technology can be ensured, and at the same time, the following multi-radio access technologies under the following multi-radio access technologies can be realized: Functions of communication system coordination:

1. Through the way of information collection and acquisition, the mobile terminal and the network can obtain the characteristics and supported capabilities of each other, and can also obtain the characteristics and supported capabilities of other networks, so as to realize the network capability negotiation of the multi-wireless communication system, Thereby improving the performance of the terminal in selecting the service network, assisting in handover decisions, negotiating network capabilities with the target network in advance, and reducing the delay in the handover process, etc.;

2. Obtain information of different networks through requested or unsolicited methods: such as physical layer parameters, load conditions, and supported quality of service, including the information obtained from the above-mentioned network capability negotiation, so that the terminal can obtain from these information, Select the appropriate network for access to realize fast and effective network selection in the case of multi-wireless communication systems;

3. Only through unified CCM layer management and control can the network and terminals be able to perform common wireless resource management in multiple wireless access systems, achieve seamless switching between multiple wireless communication systems, and support session access, Load sharing and congestion control are functions that cannot be realized by the current single wireless access system;

4. With the increase in the number and types of multi-mode terminals and terminals in the future, the ongoing business can be carried out between terminals or between different access technologies in the same terminal at any time in the future according to the service quality of the business and user requirements. Handover ensures user experience, so various wireless access technologies are organically combined through this protocol stack, so that multiple wireless access technologies provide access services at the same time and support different upper-layer services;

5. Through this protocol stack, various wireless access technologies are combined to realize the effective use of wireless resources, the dynamic allocation of frequency spectrum to different access technologies, and the eradication of different types of access technologies (systems) that can be supported by various access technologies. The advantages and disadvantages of services, ensuring that users can move and switch between different wireless access technologies, seamless services, unified billing, single sign-on, etc., are all due to the CCM and abstraction layer functions in the protocol stack. All of these can be realized, effectively solving the limitation of a single radio access technology. Therefore, the protocol stack provides common control and management functions under the coexistence of multiple access technologies, including but not limited to spectrum sharing, QoS management, authentication, authorization and billing, security, mobility management and other functions.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present invention can easily think of changes or Replacement should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (12)

1. the framework of the protocol stack of a mobile communication system is characterized in that, comprising:

CCM layer: be positioned at the superiors of protocol stack, be used to carry out the public control relevant with multiple wireless access technology RAT; Generate the result of decision according to general event type that receives or information type, and the result of decision is issued;

Level of abstraction: be used to shield the difference between the various RAT of lower floor; The information of the various RAT that obtain is changed into general event type or information type and report; The result of decision that receives is handed down to the lower floor of various RAT correspondences.

2. the framework of the protocol stack of mobile communication system according to claim 1 is characterized in that, described framework also comprises:

Link aggregation CLL layer: the packet datagrams on upper strata is changed into the specific data format of various RAT, and send to the lower floor of various RAT correspondences; The Data Format Transform that the various RAT of lower floor are specific becomes the packet datagrams on upper strata, and sends to the upper strata.

3. the framework of the protocol stack of mobile communication system according to claim 2 is characterized in that, described CLL layer finish at least in the cutting apart of forwarding, datagram of storage, the datagram of realization, the datagram of various RAT specific service quality QoS one of.

4. the framework of the protocol stack of mobile communication system according to claim 2 is characterized in that, described framework also comprises: layer 3, layer 2 and physical layer that various RAT are specific.

5. according to claim 1,2, the framework of the protocol stack of 3 or 4 described mobile communication system, it is characterized in that the public control relevant with multiple RAT that described CCM layer is carried out comprises at least: the mobile management of terminal under the multiple RAT, the RRM of terminal under the multiple RAT, terminal access control and congested control under the multiple RAT, multi-hop relay between the various RAT networks is consulted, service authentication mandate between the various RAT networks, fail safe between the various RAT networks guarantees, QoS between the various RAT networks consults and realizes, system configuration between the various RAT networks, to the software upgrading of terminal and one of during upgrading.

6. the information interacting method of the protocol stack of a mobile communication system is characterized in that, comprising:

Set up the protocol stack of mobile communication system respectively on the different communication entity, and utilize described protocol stack to carry out information interaction between the described different communication entity, described protocol stack comprises: CCM layer and level of abstraction, wherein,

CCM layer: be positioned at the superiors of protocol stack, be used to carry out the public control relevant with multiple RAT; Generate the result of decision according to general event type that receives or information type, and the result of decision is issued;

Level of abstraction: be used to shield the difference between the various RAT of lower floor; The information of the various RAT that obtain is changed into general event type or information type and report; The result of decision that receives is handed down to the lower floor of various RAT correspondences.

7. the information interacting method of the protocol stack of mobile communication system according to claim 6 is characterized in that, described protocol stack also comprises: CLL layer, and specific layer 3, layer 2 and the physical layer of various RAT, wherein,

Described CLL layer: the packet datagrams on upper strata is changed into the specific data format of various RAT, and send to the lower floor of various RAT correspondences; The Data Format Transform that the various RAT of lower floor are specific becomes the packet datagrams on upper strata, and sends to the upper strata.

8. the information interacting method of the protocol stack of mobile communication system according to claim 7 is characterized in that, described method specifically comprises:

The CCM layer of the described protocol stack on the transmitting terminal communication entity will this layer management control messages by datum plane CLL layer carry out adaptive after, with the management control messages after adaptive as the specific RAT data carried by data of lower floor;

The CCM layer of described transmitting terminal communication entity sends to described management control messages after adaptive on the CCM layer of the described protocol stack on the receiving terminal communication entity.

9. the information interacting method of the protocol stack of mobile communication system according to claim 7 is characterized in that, described method specifically comprises:

The CCM layer of the described protocol stack on the transmitting terminal communication entity is handed down to local level of abstraction with management control messages;

The level of abstraction of described this locality with described management control messages by datum plane CLL layer carry out adaptive after, with the management control messages after adaptive as the specific RAT data carried by data of lower floor;

The level of abstraction of described this locality sends to the level of abstraction of the described protocol stack on the receiving terminal communication entity with described management control messages after adaptive, and the level of abstraction of receiving terminal sends to described management control messages after adaptive on the CCM layer of receiving terminal.

10. the information interacting method of the protocol stack of mobile communication system according to claim 7 is characterized in that, described method specifically comprises:

The L3 layer of the described protocol stack on the transmitting terminal communication entity reports local level of abstraction with local event information;

The level of abstraction of described this locality with described local event information by datum plane CLL layer carry out adaptive after, with the local event information after adaptive as the specific RAT data carried by data of lower floor;

The level of abstraction of described this locality sends to described local event information after adaptive the level of abstraction of the described protocol stack on the receiving terminal communication entity;

The local event information that described protocol stack level of abstraction on the described receiving terminal will receive after described adaptive sends to the CCM layer of the described protocol stack on the described receiving terminal.

11. the information interacting method of the protocol stack of mobile communication system according to claim 7 is characterized in that, described method specifically comprises:

The management control messages that the level of abstraction of the described protocol stack on the transmitting terminal communication entity issues the CCM layer is handed down to local L3 layer;

The L3 layer of described this locality transforms described management control messages or translation becomes the L3 message of self system;

The L3 layer of described this locality sends to the L3 message of described self system by the specific RAT of lower floor carrying the L3 layer of the described protocol stack on the receiving terminal communication entity;

The L3 layer of the described protocol stack on the described receiving terminal sends to the message that receives the level of abstraction of the described protocol stack on the described receiving terminal;

The level of abstraction of the described protocol stack on the described receiving terminal sends to the message that receives the CCM layer of the described protocol stack on the described receiving terminal again.

12. the information interacting method of the protocol stack of mobile communication system according to claim 7 is characterized in that, described method specifically comprises:

The local event information that the L3 layer of the described protocol stack on the transmitting terminal communication entity reports lower floor transforms or translation becomes the L3 message of self system;

The L3 of the described protocol stack on the transmitting terminal communication entity sends to the L3 message of described self system by the specific RAT of lower floor carrying the L3 layer of the described protocol stack on the receiving terminal communication entity;

The L3 layer of the described protocol stack on the described receiving terminal sends to the message that receives the level of abstraction of the described protocol stack on the described receiving terminal;

The level of abstraction of the described protocol stack on the receiving terminal sends to the message that receives the CCM layer of the described protocol stack on the described receiving terminal again.

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