CN101232495A - Architecture of protocol stack in radio communication system and information interactive method - Google Patents
Architecture of protocol stack in radio communication system and information interactive method Download PDFInfo
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Abstract
The invention provides a method for protocol stack architecture and information interaction of a mobile communication system. The architecture consists essentially of a CCM (Common Control Management) layer, which is disposed on the uppermost layer of the protocol stack and used for implementing a plurality of common controls related to RAT (Radio Access Technology); generating a decision result according to the types of received general event type or of the information and sending the result to a lower layer; and an abstract layer which is used for shielding the difference between various RATs of the lower layer, transforming various types of required RAT information into a general event type or an information type for reporting to an upper layer, and sending the received decision result to the lower layer corresponding to various RATs. The method solves the problem that the architecture of the protocol stack is not definite in an environment where a plurality of access technologies coexist.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to a kind of framework and information interacting method thereof of protocol stack of wireless communication system.
Background technology
Along with express network technology and development of multimedia technology, the development of wireless network is very fast, and wireless network evolves to packet switching from circuit switching gradually, and various WiMAX access technologies emerge in an endless stream.At present, main wireless network has GSM (Global System for Mobile, global system for mobile communications), GPRS (General Packet Radio Service, GPRS), WCDMA (Wideband Code Division Multiple Access, Wideband Code Division Multiple Access (WCDMA)), CDMA (code division multiple access, code division multiple access inserts) 2000, WiMAX (Worldwide Interoperability Microwave Access, micro-wave access to global intercommunication), B3G (The third Generation Mobile Communication 3-G (Generation Three mobile communication system)) or 4G wireless access systems such as (The forth Generation Mobile Communication the 4th third-generation mobile communication systems).
Along with the various wireless technologys of the development of wireless network also emerge in an endless stream, as physical-layer techniques of OFDM (orthogonalfrequency division multiplexing, OFDM) technology, relay station technology, Access Network integration technology, frequency spectrum share technology and various modes etc.From user's angle, the user wishes that communication system can provide ubiquitous, personalized, safe and reliable service, can receive oneself predetermined significant service by any available access means anywhere.In order to realize above-mentioned user's requirement, need the seamless mobility between the above-mentioned multiple wireless technology of realization.
Agreement is the basis of communication, agreement by organizational composition one assembly levelization, interrelated, the combination of protocols that realizes certain function, this combination of protocols can be referred to as the framework or the protocol stack of agreement.In order to ensure the requirement that can in B3G or 4G system, satisfy above-mentioned user, need the protocol stack under definite a kind of isomerous environment, this isomerous environment is the wireless communication system under the multi-radio access technology, even can be the various wireless communication systems that independently adopt different communication protocol.
The implementation of the protocol stack in the prior art under first kind of multi-radio access technology is: at 3GPP (The third Generation Partnership Project, third generation collaborative project) and all be provided with in the 3GPP2 system and WLAN (Wireless Local Area Network, WLAN (wireless local area network)) interconnection of system, but because the system design between WLAN and 3GPP or the 3GPP2 etc. are fully independently, their protocol stack architecture just is independently two to overlap agreements simply and deposit fully.Therefore, between WLAN and 3GPP or 3GPP2, taked the mode of loose coupling, the protocol stack that is their chains of command separately is fully independently, the Authentication Authorization and the accounting server of 3GPP or 3GPP2 system only in wlan system, have been used, 3GPP or 3GPP2 system and extraneous PDN (PacketData Network have been used, Packet Data Network) borde gateway (as the PDSN in GGSN among the 3GPP or the 3GPP2 system), data just can be implemented in the switching between the wireless access technologys such as WLAN and 3GPP or 3GPP2 by the agreement of mobile IP then.
The shortcoming of the implementation of the protocol stack in the above-mentioned prior art under first kind of multi-access technology is:
1, owing to coordination and the processing between WLAN and 3GPP or 3GPP2, do not carried out between the access technology, to cause handoff procedure just to be equivalent to the initial network entry process, need carry out again sub-district, network synchronously, the process of a series of initial network entry such as selection, Certificate Authority, to cause very big propagation delay time like this, the increase of time delay will cause realizing professional continuity, finally can't well be implemented in seamless the moving between the different access technologies;
2, two among WLAN and 3GPP or the 3GPP2 overlaps independently that protocol stack can't organically combine, and can't make full use of the optimization that some user context informations before switching switch in handoff procedure;
3, can't support seamless switching between the different system, and function and other public control and management functions of the many RRMs such as access control, load balancing and congested control under the multi-radio access technology coexistence.
The implementation of the protocol stack in the prior art under second kind of multi-access technology is: be provided with in the evolution system of 3GPP and the interconnection of existing 3GPP system, the interconnected relationship that should have 3GPP system and its evolution system now is mainly: the GPRS Core (GPRS nuclear) of existing 3GPP is responsible for inserting for portable terminal the control and the management on its access network UTRAN (Universal Terrestril Radio Access Network, Universal Terrestrial Radio Access Network road); And the evolution block core net network EPC of the evolution system of 3GPP (Evolved Packet Core evolution block core net network) is responsible for inserting as portable terminal the control and the management of the 3GPP Access Network of evolution, MME (Mobile Management Entity, mobile management entity) is responsible for finishing this function, and require the amount of information exchange between MME and the GPRS Core enough abundant, can satisfy the requirement of the 3GPP Access Network of distributed existing and evolution.
The shortcoming of the implementation of the protocol stack in the above-mentioned prior art under second kind of multi-access technology is:
1, the access network resource use information, signal quality etc. to be used for supporting still can't be shared fully as the information of public control such as switchings and management function in 3GPP system and two systems of its evolution system;
2, two in 3GPP system and its evolution system overlaps independently organically combination of protocol stack, do not formulate and make full use of the mechanism that some user context informations before switching are optimized switching in handoff procedure;
3, can't support seamless switching between the different system fully, this scheme is used the specific message of 3GPP system between GPRS Core and EPC, can't expand to public control and management between 3GPP system and the non-3 GPP system.
The implementation of the protocol stack in the prior art under the third multi-access technology is: for seamlessness and the continuity that realizes switching, IEEE802.21 has introduced a new MIHF (Media Independent Handover Function in existing mobility management protocol stack, the media independent handoff protocol functional layer) entity, this MIHF entity is finished performance, the event-monitoring of bottom to a certain extent; Functions such as management and the behavior of control link.The handoff procedure that the MIHF entity mainly provides following service to help the user:
MIH Event Service (MIES): event classification, event filtering and event report about the dynamic change incident of link characteristics, Link State and link-quality are provided.
MIH command service (MICS): provide MIH user management and control the link behavior relevant with switching and mobility.
MIH information service (MIIS): the feature and the professional details of service network and ambient network are provided, and these information are used for the efficient system access and switch decision.
The position of MIHF entity and key service schematic diagram are as shown in Figure 1.The MIHF entity logically is defined as a thin layer in the mobility management protocol stack of terminal and network, plays the function of assistant and boost motor in switching decision.At the terminal of supporting multimode, many wireless access, offer the upper strata and need make some necessary informations of switching decision and how effectively making the switching decision, switching decision and link selection are made based on input and the context of MIHF in the upper strata, thereby may realize seamless switching.
In addition, IEEE802.21 has also defined the handoff protocol of media-independent, mainly is the description for following flow process:
The MIH ability discovery: the MIHF of terminal or network finds which entity supports the MIH function, and the degree of supporting how.
The MIH remote login: the MIHF of different network elements can register mutually, switches message to accept media-independent, comprises remote events.
The MIH interacting message: the MIHF at two ends can use the MIH agreement to carry out alternately by suitable transmission means.Form, message format and the message interaction process of bag have been stipulated in the agreement.
The shortcoming of the implementation of the protocol stack in the above-mentioned prior art under the third multi-access technology is:
1, this scheme has only been considered the initial of switching and the mechanism of preparing, and does not provide enough mechanism for actual switch decision, switching execution etc.; Cause supporting that the process of handoff functionality is also imperfect;
2, this scheme only is the mobility protocol on upper strata for the service on upper strata, as mobile IP, IP or host identity protocol (HIP) etc., how not consider fully with all functions entity of the public control on upper strata and management and lower floor or and the opposite end communicate by letter and control takes into account, can't be from public control and the seamless switching under many wireless access of mechanism realization environment;
3, this scheme does not have clear and definite protocol stack architecture, can't determine one group stratified, be mutually related, realize the combination of protocols of certain function;
4, this scheme does not provide the data interactive method of datum plane for control plane; Practical mechanism is not provided during for practical application.
The implementation of the protocol stack in the prior art under the 4th kind of multi-access technology is: this scheme has all proposed certain methods for the session foundation of the network selecting under the multi-access technology environment, multi-access technology, the distributed structure/architecture of multi-protocols etc.Main all is from the function notion that the controlled function of having established single access technology and multiple access must all exist that distributes, and coordination and processing between single access technology and the multi-access technology controlled function entity all can be arranged, and finally realizes relevant function.
The shortcoming of the implementation of the protocol stack in the above-mentioned prior art under the 4th kind of multi-access technology is:
1, this scheme has only been introduced certain methods from the function realization flow, promptly only related to AP (the Access Point of portable terminal, specific access technology, access point) Control Node of (base station etc.), specific access technology and public Control Node, and the information interaction between them; In fact do not relate to how to realize this information interaction, and concrete functional protocol trestle structure etc.;
2, this scheme does not relate to any and relevant contents such as access technology, connecting system protocol stack;
3, this scheme does not consider to support the seamless switching between the different system, public control under the multi-radio access technology environment and management and message mutual more do not provide a kind of mechanism of universal flexible to realize guaranteeing that the public control of seamless mobility, the function of management function realize under various connecting system, different commercial operation environment (cooperation or competition), the different system evolved degree.
The implementation of the protocol stack in the prior art under the 5th kind of multi-access technology is: this scheme has proposed a kind of implementation method that has (moving) terminal equipment of multi-access technology interface.This scheme in wireless terminal, be equipped with two or more statically be tuned to the radio transceiver of non-interfering channel, which channel this wireless terminal can determine to use when communicating by letter with adjacent radio node.The multiple radio waves unifying protocol of realizing in radio node is coordinated the use of a plurality of wireless network interface cards, and the virtual level that provides the higher level of the protocol stack that a plurality of physical network interfaces are used to stash.Make that using available channel to transmit simultaneously becomes possibility, disturb and delay, increase the total capacity of network simultaneously thereby reduce.This scheme mainly is to have under the situation of multiple radio access interface at terminal or main frame, finds a plurality of radio access interfaces that peer node is possible by estimation of cyclical signal quality and selection for the opposite end.
The shortcoming of the implementation of the protocol stack in the above-mentioned prior art under the 5th kind of multi-access technology is:
Although 1, this scheme provides virtual level to come the layer on the virtual level is hidden the otherness of the various wireless technologys of lower floor's existence, guarantee the evolution on upper strata and the independence of lower floor's wireless access technology evolution.But the service for the upper strata only is the multi radio uniform protocol, how not consider fully with all functions entity of the public control on upper strata and management and lower floor or and the opposite end communicate by letter and control takes into account, can't be from public control and the seamless switching under many wireless access of mechanism realization environment; And only be the method that provides at a plurality of radio access interfaces of how finding the opposite end communication node;
2, this scheme does not have clear and definite protocol stack architecture, can't determine one group stratified, be mutually related, realize the combination of protocols of certain function;
3, this scheme does not provide the data interactive method of datum plane for control plane; Practical mechanism is not provided during for practical application.
Summary of the invention
The embodiment of the invention provides a kind of framework and information interacting method thereof of protocol stack of wireless communication system.Thereby solved under multiple access technology and the environment deposited, do not had the problem of the framework of clear and definite protocol stack.
The embodiment of the invention is achieved through the following technical solutions:
A kind of framework of protocol stack of mobile communication system is characterized in that, comprising: merge and converge control and management 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 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.
A kind of information interacting method of protocol stack of mobile communication system comprises:
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.
The technical scheme that is provided by the invention described above embodiment as can be seen, the embodiment of the invention provides under a kind of multi-access technology, the framework of the protocol stack of the wireless communication system under particularly multiple wireless access technology or the multimodality technology, and the various functions such as dynamic combined of the network insertion relevant, selection, switching, paging, data route, mobile management, QoS (Quality of Serice, service quality) negotiation and management, Certificate Authority authentication, network have been determined with this protocol stack.
The technique scheme that the embodiment of the invention provides is supported public control and management for multi-radio access technology; Can the simultaneous adaptation legacy system, the different stages of development of each systems such as the evolution of legacy system, new system, the transmission means of control plane signaling message is versatile and flexible, and flexible, various attainable protocol stack system is provided; By the introducing of level of abstraction, reduced the degree of coupling between public control in upper strata and management and the specific access technology.
Description of drawings
Fig. 1 is the position and the key service schematic diagram of MIHF entity in the prior art;
Fig. 2 is the structural representation of the protocol stack of the described wireless communication system of the embodiment of the invention;
Carry out the handling process of information interaction between a kind of different communication entity that Fig. 3 provides for the embodiment of the invention by the CCM layer;
Carry out the handling process of information interaction between a kind of different communication entity that Fig. 4 provides for the embodiment of the invention by level of abstraction;
Carry out the handling process of information interaction between a kind of different communication entity that Fig. 5 provides for the embodiment of the invention by the L3 layer;
Fig. 6 a kind ofly carries out far-end network information by the CCM layer information exchange and obtains handling process with reporting events for what the embodiment of the invention provided;
Fig. 7 a kind ofly carries out far-end network information by the level of abstraction information interaction and obtains handling process with reporting events for what the embodiment of the invention provided;
Fig. 8 a kind ofly carries out far-end network information by the L3 layer information exchange and obtains handling process with reporting events for what the embodiment of the invention provided;
A kind of handling process of carrying out the far-end reporting events by the level of abstraction information interaction that Fig. 9 provides for the embodiment of the invention.
Embodiment
The embodiment of the invention provides a kind of framework and information interacting method thereof of protocol stack of wireless communication system.
The structural representation of the protocol stack of the described wireless communication system of the embodiment of the invention as shown in Figure 2.The structure of this protocol stack comprises according to order from top to bottom: CCM (Converged ControlManagement, merge and to converge control and management) layer, level of abstraction, CLL (Convergence Link-layer, the link aggregation layer) layer, specific L3 (layer 3), L2 (layer 2) and the PHY (Physical Layer, physical layer) of access technology.
Being described in detail as follows of the function of above-mentioned each layer of protocol stack:
CCM layer: be positioned at the superiors of protocol stack, be used to carry out the public controlled function relevant with multiple access technology.This controlled function comprises at least: the mobile management of terminal under the multi-access technology, the RRM of terminal under the multi-access technology, the terminal access control of terminal under the multi-access technology, the congested control of terminal under the multi-access technology, multi-hop relay between the heterogeneous networks is consulted, service authentication mandate between the heterogeneous networks, fail safe between the heterogeneous networks guarantees, QoS between the heterogeneous networks consults and realizes, system configuration between the heterogeneous networks, to in the functions such as the software upgrading of terminal and upgrading one of.Wherein, service authentication mandate, fail safe guarantee and QoS consults and parts such as realization also can be handled by upper-layer protocol more.
The CCM layer receives general event type or the information type that level of abstraction reports, and event type that this is general or information type generate the result of decision as decision factor according to this decision factor, and the result of decision is handed down to level of abstraction.Therefore, the CCM layer only need be paid close attention to concrete strategy, does not need the detail of processing events.Such protocol stack architecture also is convenient to expansion, is convenient to hold new radio access technology types.
Above-mentioned CCM can be used as a public controlled entity, also can adopt distributed mode to realize this function.
Level of abstraction: be used to shield the difference between the various different access technologies of lower floor, hide specific L3 layer, L2 layer and the physical layer of multiple access technology of lower floor.This level of abstraction provides service by the irrelevant interface of a technology to the upper strata, and obtains lower floor's service by the relevant interface of a series of and various different access technologies.This level of abstraction is not negated the treatment mechanism and the interface of (discarding) existing various access technologies inside, but has adopted a kind of unified intermediate layer to encapsulate the various different access technologies of lower floor.
After level of abstraction receives the order that the CCM layer issues, call the primitive of the specific L3 of corresponding medium (layer 3) or L2 (layer 2) or L1 (layer 1), this primitive is handed down to lower floor according to the different access technologies of lower floor.And about the various information of lower floor, for example the dynamic change incident of link characteristics, Link State and link-quality is all translated into general event type or information type by this level of abstraction, and reports the CCM layer.
In addition, mutual by between the level of abstraction between the different entities, can be around not needing to insert under the situation of other type network, obtain the service and the characteristic details of required ambient network from current service network, these information help the CCM layer to carry out the efficient strategy decision-making.
If all wireless communication systems can both be supported interface, the signaling format that public control and management provide, require in the future, can discern and handle the message of public control and management, then level of abstraction can not need.
The CLL layer: the packet datagrams (as IP datagram, ATM datagram etc.) that the upper strata is issued changes into the specific data format of RAT (wireless access technology), and sends to the lower floor of various RAT correspondences.Be beneficial on Radio Link, transmit better, finish at least simultaneously in the reorganization functions such as (necessary words) of the cutting apart of forwarding, datagram, datagram of storage, the datagram of realization, the datagram of the specific QoS of RAT (service quality) one of.And the specific Data Format Transform of being responsible for lower floor is received of various RAT becomes the grouped data report form on upper strata, and sends to the upper strata.
The function of L3 layer, L2 layer and physical layer that the access technology under the described mobile communication system of the embodiment of the invention is specific and existing WCDMA (Wideband Code Division Multiple Access, Wideband Code Division Multiple Access (WCDMA)), CDMA (Code Division Multiple Access, code division multiple access) 2000 WiMAX (Worldwide Interoperability for Microwave Access,, micro-wave access to global intercommunication) etc. system is identical
The L3 layer: mainly be responsible for the control, scheduling of the Radio Resource under the described mobile communication system of the embodiment of the invention etc., and for the functions such as control, measurement and management of L2 layer and physical layer.Comprising: functions such as the connectivity management of terminal, the mobile management of terminal, terminal access control, congested control, RRM.Can also carry out functions such as the resource allocation of multimodal coordination and switching, relay station and scheduling if desired.
Utilize the structure of the described protocol stack of the invention described above embodiment, mobile communication system is for control of this locality and being described below of management:
The adaptive of primitive can be carried out by level of abstraction in upper strata (CCM layer), thereby the specific L3 layer of RAT, L2 layer and physical layer are realized information acquisition services, command service or Event Service.
For new wireless access technology, consider that this technology can discern and carry out the indicated function of upper strata primitive, then can be without level of abstraction adaptive, directly mutual by the upper strata with specific L3, L2 and the physical layer of local RAT.
Utilize the structure of the described protocol stack of the invention described above embodiment, mobile communication system is for the control of far-end and being described below of management:
Local upper strata (CCM layer) can directly send a message to the upper strata (CCM layer) of opposite end by datum plane, and starts the mutual of local control and management realization message by the upper strata (CCM layer) of opposite end;
Local CCM layer or bottom trigger, send to the level of abstraction of opposite end with the form of level of abstraction message through the transmission of datum plane by the level of abstraction of this locality, again according to type of message, to the specific L3 of the RAT of opposite end, the upper strata of L2 and physical layer or opposite end (CCM) is mutual by the level of abstraction of opposite end;
In addition, local upper strata (CCM layer) can be by the adaptive specific L3 message of RAT that becomes of the level of abstraction of this locality, send to the specific L3 layer of RAT of opposite end, according to type of message, decision is to the RAT of opposite end specific L2 and physical layer or mutual by opposite end level of abstraction and upper strata (CCM layer) by this L3 layer.
Utilize the structure of the described protocol stack of the invention described above embodiment, mobile communication system is as follows for the processing of datum plane:
The CLL layer changes into the specific data format of RAT with the IP datagram on upper strata and is beneficial to transmit on Radio Link better, finishes the realization of QoS, the storage of datagram, the functions such as (necessary words) of transmitting, cut apart, recombinate simultaneously.And be responsible for the specific Data Format Transform of various RAT that lower floor receives become the upper strata the grouped data report form.
Utilize the framework of the described protocol stack of the invention described above embodiment, can carry out information interaction between each different communication entity.This information interaction can CCM layer for above-mentioned protocol stack between, between the level of abstraction or the information interaction between the L3 layer of specific RAT.Above-mentioned information interaction can be the information interaction in switching between interdepartmental system or the various pattern, frequency spectrum share or the load balancing process; Also can be for carrying out the information interaction in the mutual and implementation of far-end control command between portable terminal and the mobile communication system; Also can be for carrying out the information interaction in the far-end reporting events process between portable terminal and the mobile communication system.
The handling process of carrying out information interaction by the CCM layer between a kind of different communication entity that the embodiment of the invention provides as shown in Figure 3.
In this embodiment, can direct communication between the CCM layer on the communication entity of this locality and opposite end, the adaptive back of the management control messages process datum plane CLL layer of local CCM layer is as lower floor's specific wireless access technology data carried by data, then, this management control messages is directly sent to the CCM layer of opposite end.Concrete processing procedure comprises the steps:
The CCM layer of step 31, terminal receives the trigger event that some may produce switching, and decision triggers initial handoff procedure.
The management control messages of the CCM layer of step 32, terminal by datum plane CLL layer carry out adaptive after, with the management control messages after adaptive as lower floor's specific wireless access technology data carried by data.Then, the CCM layer of terminal in its former service wireless communication system sends handover negotiation optimization message, and terminal service wireless communication system former with it begins the handoff issues of holding consultation.
The CCM layer of the former service wireless communication system of step 33, terminal is consulted handoff issues by the CCM layer of CCM interacting message and Target Wireless communication system.At this moment, the former service wireless communication system of terminal may get in touch with a plurality of Target Wireless communication systems and consult.
The CCM layer of step 34, above-mentioned Target Wireless communication system feeds back to the result of handover negotiation optimization on the CCM layer of above-mentioned former service wireless communication system.
The CCM layer of step 35, above-mentioned former service wireless communication system returns to negotiation result on the CCM layer of terminal.
Step 36, terminal are carried out corresponding switch decision according to the negotiation result that receives, after the terminal decision is switched, and the Radio Link of terminal deletion itself and former service wireless communication system, and set up and the Radio Link of the Target Wireless communication system chosen.
Above part steps may repeat repeatedly, perhaps has interacting message repeatedly to determine finally whether switching is carried out.
The handling process of carrying out information interaction by level of abstraction between a kind of different communication entity that the embodiment of the invention provides as shown in Figure 4.
This handling process is primarily aimed at former service wireless communication system and is not upgraded to fully under the situation of supporting the CCM layer, how to realize the switching flow between the multi-radio access technology.Processing and forwards that this handling process needs wireless communication system can provide level of abstraction to be similar to, and send to negotiation and the processing that the specific L3 layer of lower floor's access technology and other lower floor are correlated with by the peer message that level of abstraction can send terminal or other system.
This handling process mainly comprises following treatment step:
The CCM layer of step 41, terminal receives the trigger event that some may produce switching, and decision triggers carries out initial handoff procedure.
The CCM layer of step 42, terminal sends to local level of abstraction with handover negotiation optimization message, and the local level of abstraction of notice is handled accordingly.
The management control messages of the level of abstraction of step 43, terminal is by after CLL layer adaptive, with the management control messages after adaptive as lower floor's specific wireless access technology data carried by data.Then, the level of abstraction of terminal in its former service wireless communication system sends handover negotiation optimization message, and terminal service wireless communication system former with it begins the handoff issues of holding consultation.
The level of abstraction of step 44, former service wireless communication system and the levels of this system carry out (supposing that herein the CCM layer in the former service wireless communication system is temporarily unavailable after the possible processing, only level of abstraction can carry out the simple process and the forwarding of message), consult handoff issues (may get in touch with a plurality of goal systems) herein by the level of abstraction of interacting message between the level of abstraction and goal systems.
The CCM layer that the level of abstraction of step 45, Target Wireless communication system is submitted to the Target Wireless communication system with handover negotiation optimization message is handled.
The CCM layer of step 46, Target Wireless communication system feeds back to the result of handover negotiation optimization the level of abstraction of Target Wireless communication system.
The level of abstraction of step 47, Target Wireless communication system feeds back to level of abstraction in the former service wireless communication system with the handover negotiation optimization result.
The level of abstraction of step 48, former service wireless communication system returns to negotiation result the level of abstraction of terminal.
The level of abstraction of step 49, terminal feeds back to local CCM layer with the handover negotiation optimization result.
Step 41 0, terminal are carried out corresponding switch decision according to the negotiation result that receives, after the terminal decision is switched, and the Radio Link of terminal deletion itself and former service wireless communication system, and set up and the Radio Link of the Target Wireless communication system chosen.
The handling process of carrying out information interaction by the L3 layer between a kind of different communication entity that the embodiment of the invention provides as shown in Figure 5.
This handling process is primarily aimed at former service wireless communication system and is not upgraded to fully under the situation of supporting the CCM layer, how to realize the switching flow between the multi-radio access technology, the management control messages of CCM layer carries out adaptive through level of abstraction, converting the top signaling form (being carried on the radio resource control RRC signaling as the non access stratum NAS message among the 3GPP) that the L3 layer of specific wireless access technology can carry to or translating becomes for this L3 layer control messages.The message of L3 layer will send to this message the L3 layer of opposite end through lower floor's specific RAT datum plane data carried by data.Be reported to relevant level (layer 3, lower floor, level of abstraction or CCM layer) to hold consultation and handle again.
This handling process mainly comprises the steps:
The CCM layer of step 51, terminal receives the trigger event that some may produce switching, and decision triggers carries out initial handoff procedure.
The CCM layer of step 52, terminal sends to local level of abstraction with handover negotiation optimization message, and the local level of abstraction of notice is handled accordingly.
The local L3 layer of level of abstraction notice of step 53, terminal need start the negotiation (perhaps giving the L3 layer with handover negotiation optimization message as the message informing that the L3 layer can carry) of switching.
The L3 layer of step 54, terminal transforms or translates the L3 message that becomes self system with this message, by lower floor's specific wireless access technology carrying the L3 message of this self system is sent to L3 layer in the former service wireless communication system.
The L3 layer of step 55, former service wireless communication system is given the information reporting that receives the level of abstraction of this system.
The level of abstraction of step 56, former service wireless communication system is given the CCM layer of this system with the information reporting that receives, and the CCM layer is handled this handover negotiation optimization message.
The CCM layer of step 57, former service wireless communication system is consulted handoff issues by the CCM layer of direct interacting message and Target Wireless communication system, at this moment, the former service wireless communication system of terminal may get in touch with a plurality of Target Wireless communication systems and consult.
The CCM layer of step 58, Target Wireless communication system feeds back to the result of handover negotiation optimization on the CCM layer of former service wireless communication system.
The CCM layer of step 59, former service wireless communication system is given the level of abstraction of this system with the handover negotiation optimization result notification, and requires this level of abstraction that this handover negotiation optimization result is fed back to terminal.
The local L3 layer of level of abstraction notice of step 510, former service wireless communication system need return the result (the perhaps message informing L3 that the handover negotiation optimization feedback message can be carried as L3) of handover negotiation optimization.
The L3 layer of step 511, former service wireless communication system transforms or translates the L3 message that becomes self system with this message, the L3 message of this self system is sent to the L3 layer of terminal by lower floor's specific wireless access technology carrying.
The L3 layer of step 512, terminal is given the information reporting that receives the level of abstraction of this terminal.
The level of abstraction of step 513, terminal is given the CCM layer of terminal with the information reporting that receives, and the CCM layer is handled this handover negotiation optimization message.
Step 514, terminal are carried out corresponding switch decision according to the result of CCM layer, after terminal decision is switched, and the Radio Link of terminal deletion itself and former service wireless communication system, and set up and the Radio Link of the Target Wireless communication system chosen.
Utilize the structure of the described protocol stack of the invention described above embodiment, the embodiment of the invention provides a kind of by the CCM layer information exchange carry out far-end network information obtain with the handling process of reporting events as shown in Figure 6.
This handling process is primarily aimed at orders such as far-end measuring or information is obtained.Similar with handoff procedure, far-end order or information for upper strata CCM layer are obtained etc., can adopt direct communication between the CCM layer, adaptive by the CLL of corresponding datum plane as lower floor's specific wireless access technology data carried by data, more corresponding message is sent to the opposite end; The CCM layer of opposite end becomes local command service with the message transformation that receives, and this command service is sent to the specific wireless access technology of lower floor again.
This handling process mainly comprises the steps:
The far-end measuring order of the CCM layer of step 61, remote service wireless communication system is adaptive as lower floor's specific wireless access technology data carried by data by the CLL layer.The CCM layer of remote service wireless communication system sends to the far-end measuring order on the CCM layer of terminal.
The CCM layer of step 62, terminal sends to this link measuring command local level of abstraction after the far-end measuring order that receives is transformed into local link measuring command again, and the notice level of abstraction is handled accordingly.
Local specific wireless technology L3 or the L2 or the L1 of level of abstraction notice of step 63, terminal, the present embodiment hypothesis is that the link-local that notice L2 or L1 layer are correlated with is measured.
The L2 of step 64, terminal or L1 layer report the link measurements that obtains the level of abstraction of terminal.
The level of abstraction of step 65, terminal circulates a notice of the link measurements that receives of CCM layer to this locality.
The management control messages of the CCM layer of step 66, terminal is by after CLL layer adaptive, as lower floor's specific wireless access technology data carried by data, the CCM layer of terminal sends to the said distal ends link measurements on the CCM layer of remote service wireless communication system with the management control messages after adaptive.
Far-end order or information for upper strata CCM are obtained etc., also can be undertaken adaptive by level of abstraction CCM message, message after the process level of abstraction is adaptive is adaptive as lower floor's specific wireless access technology data carried by data through datum plane CLL layer, this message is sent to the level of abstraction of opposite end, the level of abstraction of far-end transforms into local command service and sends to the specific wireless access technology of lower floor again.
The embodiment of the invention provides a kind of by the level of abstraction information interaction carry out far-end network information obtain with the handling process of reporting events as shown in Figure 7.Comprise the steps:
The CCM layer of step 71, service wireless communication system notifies local level of abstraction need carry out the measurement service of far-end.
The far-end measuring order of the level of abstraction of step 72, service wireless communication system is by after CLL layer adaptive, as lower floor's specific wireless access technology data carried by data, the service wireless communication system sends to the far-end measuring order level of abstraction of distant terminal with the far-end measuring order after adaptive.
The level of abstraction of step 73, terminal sends to local specific wireless technology L3 or L2 or L1 with the far-end measuring order that receives, and present embodiment hypothesis level of abstraction is notified to L2 or L1, is measured by the link-local that L2 or L1 are correlated with.
The L2 or the L1 of step 71, terminal report level of abstraction with link measurements.
The level of abstraction of step 75, terminal with link measurements by after CLL layer adaptive, link measurements after adaptive as lower floor's specific wireless access technology data carried by data, is sent to this link measurements the level of abstraction entity of opposite end service wireless communication system.
The level of abstraction of step 76, service wireless communication system circulates a notice of the far-end measuring result of CCM layer to this locality.
The management control messages of CCM layer carries out adaptive through level of abstraction, converting top signaling form (being carried on the radio resource control RRC signaling as the non access stratum NAS message among the 3GPP) or the translation that the L3 layer of specific wireless technology can carry to becomes for this L3 control messages, the signaling message that can discern by this L3 translation becoming L3 sends to the L3 of end, re-sends to lower floor and holds consultation and handle.Wherein the message of L3 will send to this message the L3 of opposite end through lower floor's specific wireless access technology datum plane data carried by data.(present embodiment mainly is the processing at the measuring command of far-end wireless access technology L2 or L1, and certainly not getting rid of is the situation that needs the upper strata of far-end to handle.)
The embodiment of the invention provides a kind of by the L3 layer information exchange carry out far-end network information obtain with the handling process of reporting events as shown in Figure 8.Comprise the steps:
The local level of abstraction of the CCM course of step 81, service wireless communication system sends the far-end measuring order, notifies local level of abstraction need carry out the measurement service of far-end.
The level of abstraction of step 82, service wireless communication system sends to local L3 layer with the far-end measuring order that receives, the far-end measuring that the local L3 layer of notice need be correlated with.
The L3 layer of step 83, service wireless communication system transforms or translates the L3 message that becomes self system with the far-end measuring order that receives, and the L3 message of this self system is sent to the L3 layer of terminal by lower floor's specific wireless access technology carrying.
Specific wireless technology L2 of L3 course this locality of step 84, terminal or L1 send the link measuring command, specific wireless technology L2 or L1 that notice is local, and the link-local that need be correlated with is measured.
The L2 or the L1 of step 85, terminal report L3 with link measurements.
The L3 layer of step 86, terminal transforms or translates the L3 message that becomes self system with above-mentioned link measurements, the L3 message of this self system is sent to the L3 layer of service wireless communication system by lower floor's specific wireless access technology carrying.
The L3 layer of step 87, service wireless communication system feeds back to local level of abstraction with the link measurements that receives.
The level of abstraction of step 88, service wireless communication system circulates a notice of the far-end measuring result who receives of CCM layer to this locality.
The framework of the protocol stack that provides according to the invention described above embodiment, far-end network information also can be obtained by the Event Service that lower floor initiatively triggers.
In actual applications, for three kinds of following modes of reporting of far-end incident:
1, Ben Di incident is reported to local L3 layer by the L2 or the L1 of this locality, the Data-carrying passage of the specific wireless access technology that local L3 layer provides by datum plane is the L3 peer-entities of event notice far-end, then by level of abstraction with the CCM of event notification to far-end.
2, Ben Di incident is reported to level of abstraction by the L2 or the L1 of this locality, transmission channels by above-mentioned various level of abstraction information sends to the far-end level of abstraction and (is adapted at this data carried by data above wireless access technology as adaptive the becoming of CLL again, perhaps the Data-carrying passage that the L3 by access technology transforms or translation becomes the specific wireless access technology that special message provides through datum plane arrives the L3 peer-entities of event notice far-end the level of abstraction of far-end again), the far-end level of abstraction is reported the result on the CCM layer of far-end.
3, local incident is reported to level of abstraction by the L2 or the L1 of this locality, and then the local CCM of arrival, transmission channels by above-mentioned various CCM information sends to far-end CCM layer (as directly being adapted at this data carried by data above wireless access technology by adaptive the becoming of the adaptive CLL of CCL, perhaps by level of abstraction transfer to again CLL adaptive become be adapted at this above wireless access technology data carried by data arrive the far-end level of abstraction, upload to far-end CCM then, perhaps the Data-carrying passage that the L3 by level of abstraction and access technology transforms or translation becomes the specific wireless access technology that special message provides through datum plane arrives the L3 peer-entities of event notice far-end the level of abstraction and the CCM layer of far-end again).
A kind of handling process of carrying out the far-end reporting events by the level of abstraction information interaction that the embodiment of the invention provides as shown in Figure 9.Comprise the steps:
The specific wireless technology L2 of step 91, terminal or L1 are when the incident that the needs that are provided with report takes place, with the local L3 layer of reporting events information notice.
The L3 layer of step 92, terminal is notified the reporting events information that receives to the level of abstraction of this locality.
Step 93, local level of abstraction are sent to the reporting events information that receives to the level of abstraction of serving wireless communication system.
The level of abstraction of step 94, service wireless communication system sends to local CCM layer with the reporting events information that receives.
From above each embodiment as can be seen, the framework of the protocol stack that provides by the embodiment of the invention can provide the mutual of flexile control signaling, the final public control that realizes for various wireless access technologys.
Framework and information interacting method by the described protocol stack of the invention described above embodiment, the original function of wireless communication system under single wireless access technology can be guaranteed, the function that the multi wireless communication system under several multi-radio access technologies is coordinated can also be achieved as follows simultaneously:
1, by information gathering, the mode obtained, portable terminal and network can obtain the other side's characteristic and the ability that can support, but also can obtain the characteristic of other networks and the ability of being supported, realize the network capabilities negotiation of multi wireless communication system, thereby improve terminal select the performance of service network, auxiliary switch decision, in advance and objective network carry out network capabilities and consult, reduce the time delay of handoff procedure etc.;
2, the information of the acquisition heterogeneous networks by request mode or non-request mode: as physical layer parameter, loading condition, the service quality that can support, comprise the information that above-mentioned network capabilities negotiation is obtained, thereby make that terminal can be from these information, select suitable network to insert, realize the network selecting under the multi wireless communication system situation fast and effectively;
3, have only by unified CCM layer-management and control, could make network and terminal can in multiple wireless access system, carry out public RRM, reach the seamless switching between the multi wireless communication system, support session access, load balancing, congested control, these all be present single wireless access system the function that can't realize;
4, along with the growth of following multimode terminal and terminal number, type, following can the switching ongoing business between terminal or between the different access technologies in the same terminal according to the service quality of business and user's requirement etc. at any time, guarantee user experience, so various wireless access technologys are organically combined by this protocol stack, make multi-radio access technology that access service is provided simultaneously, support different upper-layer service;
5, by this protocol stack various wireless access technologys are combined, realize effective utilization of Radio Resource, the dynamic assignment of frequency spectrum is given different access technologies, thoroughly do away with the quality of the dissimilar business that various access technologies (system) can support, guarantee the user can move between the different wireless access technologys, seamless service under the switch instances, unified charging, single login etc., all, solved the limitation under single wireless access technology effectively because CCM and level of abstraction function in this protocol stack make this to realize.So this protocol stack provides the public control under the multi-access technology coexistence situation and the function of management, includes but not limited to functions such as frequency spectrum share, QoS management, Certificate Authority and charging, safety, mobile management.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
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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