CN100584058C - Information interactive system and implementing method - Google Patents
Information interactive system and implementing method Download PDFInfo
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- CN100584058C CN100584058C CN200610080694A CN200610080694A CN100584058C CN 100584058 C CN100584058 C CN 100584058C CN 200610080694 A CN200610080694 A CN 200610080694A CN 200610080694 A CN200610080694 A CN 200610080694A CN 100584058 C CN100584058 C CN 100584058C
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Abstract
This invention discloses an information interaction system including a base station controller(BSC), a transformation and rate adaptive unit(TRAU), a load sharing and processing unit at the BSC side, a link control module at the BSC side, a load sharing and processing module at the TRAU side and a link control module at the TRAU side, in which, the shairing and processing module at the BSC side is used in realizing load shairing and processing of thr BSC side, the TRAU load sharing and processing module is used in realizing process at the TRAU side, the link control module at the BSC side is used in controlling the links of the BSC side to realize reliability of the BSC side and the link control module at the TRAU side is used in controlling the links of the TRAU side to realize the reliability of the links at the TRAU side. This invention also discloses an information interaction method between the BSC side and TRAU side.
Description
Technical field
The present invention relates to wireless communication technology field, more particularly, relate to information interaction system and implementation method between a kind of base station controller (BSC) side and speech coding conversion and Rate Adapter Unit (TRAU).
Background technology
Speech coding conversion and Rate Adapter Unit (TRAU) are the part of BSC in logic, but in fact can be placed apart with BSC, such as being put into the MSC machine room, this moment TRAU are referred to as the TRAU extension unit of BSC.TRAU zoomed out be placed into core net and handle the transmission bandwidth that effectively to save between BSC and the core net machine room.PCM voice with 64kbit/s are example, after handling through the encoding and decoding compression, can become the compressed voice of 16kbit/s, and compression ratio is 4: 1.Like this, transmission compressed voice signal ratio transmission PCM signal will be saved about 75% bandwidth, thereby can greatly reduce the transmission operation cost of operator.
Yet, TRAU zoomed out also can bring some technical problems.How guaranteeing the reliable signaling transmission between local side of BSC and the TRAU extension unit, is exactly one of them.Though in existing gsm protocol, proposed the notion that TRAU zooms out, stipulated for adopting which kind of mode not communicate between local side of BSC and the TRAU extension unit.If on the E1 circuit, adopt common link layer protocol (for example LAPD) to transmit signaling, voice or the data of local frame of BSC and TRAU extension unit, can't guarantee that obviously reliability meets the demands, also can't realize load sharing processing simultaneously.
As above-mentioned analysis, if on the E1 circuit, adopt common link layer protocol to transmit the information that the local side of BSC and TRAU zoom out side, can't guarantee that reliability can meet the demands, also can't realize load sharing processing simultaneously.Like this, final owing to communication failure between BSC and the TRAU causes call failure, and cause the percent of call lost to rise.Especially when telephone traffic is busy, this will very easily cause long-time and large-area call loss, and this BSC to commercialization can not put up with.Equally, if adopt MultiCarrier PPP over E1, the hardware that needs to adopt network processing unit (NP) realize the IP bag is transmitted, otherwise performance is difficult to satisfy the demands, but the design that hardware is transmitted can increase BSC hardware and software cost and equipment complexity.
Summary of the invention
In view of this, main purpose of the present invention is the information interaction system that proposes between a kind of BSC and TRAU, transmitting information reliably between BSC side and TRAU, and realizes load sharing processing.
Another object of the present invention is that proposition is a kind of from BSC side direction TRAU side method of transmitting information, transmits information with realization reliably from BSC side direction TRAU side, and realizes load sharing processing.
A further object of the present invention is that proposition is a kind of from TRAU side direction BSC side method of transmitting information, transmits information with realization reliably from TRAU side direction BSC side, and realizes load sharing processing.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of information interaction system; This system comprises BSC and TRAU; Described TRAU and described BSC zoom out; The BSC side comprises BSC side load sharing processing module and BSC sidelinks control module; The TRAU side comprises TRAU side load sharing processing module and TRAU sidelinks control module; Wherein BSC side load sharing processing module and BSC sidelinks control module interconnect; TRAU side load sharing processing module and TRAU sidelinks control module interconnect; Described BSC sidelinks control module is connected with TRAU sidelinks control module; And
BSC side load sharing processing module is used to realize the load sharing processing of BSC sidelinks;
TRAU side load sharing processing module is used to realize the load sharing processing of TRAU sidelinks;
BSC sidelinks control module is used for the BSC sidelinks is controlled to realize the reliability of BSC sidelinks;
TRAU sidelinks control module is used for the TRAU sidelinks is controlled to realize the reliability of TRAU sidelinks;
Wherein said BSC side load sharing processing module comprises BSC side Message Transfer Part MTP3 module and BSC side SCCP SCCP module, described TRAU side load sharing processing module comprises TRAU side MTP3 module and TRAU side SCCP module, wherein BSC side MTP3 module is connected with BSC side SCCP module, and TRAU side MTP3 module is connected with TRAU side SCCP module.
Described BSC sidelinks control module is a BSC side MTP2 module, and described TRAU sidelinks control module is a TRAU side MTP2 module.
Described BSC sidelinks control module is BSC side binding multiple channels point-to-point protocol (MC PPP) module, and described TRAU sidelinks control module is a TRAU side MC PPP module.
Being connected between described BSC sidelinks control module and the TRAU sidelinks control module: the connection that is constituted by at least one E1 circuit.
A kind of described TRAU and described BSC zoom out from BSC side direction TRAU side method of transmitting information, and this method comprises:
A1, adopt the dynamic polling of link to share to select the link of transmission information to the load of BSC sidelinks;
B1, described link is controlled realizing the reliability of this BSC sidelinks, and by this link with message transmission to the TRAU side.
This method comprised that before steps A 1 reception comes from the call treatment message of TRAU side;
Steps A 1 comprises:
A11, described call treatment message is analyzed to determine whether sending resource allocation request message to TRAU;
A21, described resource allocation message is added source address and destination address, and utilize link ID to distinguish different logical links, and carry out load sharing, to select the link of transmission information by the dynamic polling of link.
Institute's information transmitted is signaling information or voice messaging.
A kind of described TRAU and described BSC zoom out from TRAU side direction BSC side method of transmitting information, and this method comprises:
A2, adopt the dynamic polling of link to share to select the link of transmission information to the load of TRAU sidelinks;
B2, described link is controlled realizing the reliability of this TRAU sidelinks, and by this link with message transmission to the BSC side.
This method comprised that before steps A 2 reception comes from the call treatment message of BSC side;
Steps A 2 comprises:
A21, described call treatment message is analyzed to determine whether responding the resource allocation response message to BSC;
A22, described resource allocation message is added source address and destination address, and utilize link ID to distinguish different logical links, and carry out load sharing, to select the link of transmission information by the dynamic polling of link.
Steps A 2 described loads to the TRAU sidelinks share for: adopt the dynamic polling of link to share to the load of TRAU sidelinks.
Institute's information transmitted is signaling information or voice messaging.
From technique scheme as can be seen, information interaction system proposed by the invention, comprise BSC and TRAU, the BSC side comprises BSC side load sharing processing module and BSC sidelinks control module, the TRAU side comprises TRAU side load sharing processing module and TRAU sidelinks control module, wherein BSC side load sharing processing module and BSC sidelinks control module interconnect, TRAU side load sharing processing module and TRAU sidelinks control module interconnect, BSC sidelinks control module is connected with TRAU sidelinks control module, and, BSC side load sharing processing module is used to realize the load sharing processing of BSC sidelinks; TRAU side load sharing processing module is used to realize the load sharing processing of TRAU sidelinks; BSC sidelinks control module is used for the BSC sidelinks is controlled to realize the reliability of BSC sidelinks; TRAU sidelinks control module is used for the TRAU sidelinks is controlled to realize the reliability of TRAU sidelinks.
This shows, because SCCP function and MTP function all are the parts of Signaling System Number 7, therefore use after the present invention, BSC can finish TRAU by existing signalling system No.7 processing capacity on the A interface and zoom out communication function, be that BSC external interface (A interface) and BSC internal interface (Ater Interface) can be handled by shared Signaling System Number 7, local and zoom out signaling and carry by inner Signaling System Number 7, thus be implemented in the information of transmitting reliably between BSC side and TRAU, and thoroughly realize load sharing processing.
Description of drawings
Fig. 1 is the demonstrative structure schematic diagram of the information interaction system between BSC side and TRAU side according to the present invention.
Fig. 2 is according to the BSC side of the embodiment of the invention and the structural representation of the information interaction system between the TRAU side.
Fig. 3 is from BSC side direction TRAU side method of transmitting information exemplary flow chart according to the present invention.
Fig. 4 is from TRAU side direction BSC side method of transmitting information exemplary flow chart according to the present invention.
Fig. 5 is the MTP routing tag schematic diagram according to the embodiment of the invention.
Fig. 6 is an exemplary method flowchart of transmitting information according to an embodiment of the invention from BSC side direction TRAU side.
Embodiment
For making the purpose, technical solutions and advantages of the present invention express clearlyer, the present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
At first reliability and load sharing are described.Reliability is meant the method for carrying out the reliable link transmission on unreliable link, generally realizes that by link layer protocol main realization means are exactly signal reception acknowledgement and retransmission mechanism.Load sharing is meant in multilink the algorithm of distributed load comparatively equably, in case wherein congested or fault appears in a link, the load on it can be shared on all the other normal links equably.
Fig. 1 is the demonstrative structure schematic diagram of the information interaction system between BSC side and TRAU side according to the present invention.As shown in Figure 1, this system comprises BSC 101 and TRAU 104, wherein TRAU 104 zooms out placement, the BSC side comprises BSC side load sharing processing module 102 and BSC sidelinks control module 103, the TRAU side comprises TRAU side load sharing processing module 15 and TRAU sidelinks control module 106, wherein BSC side load sharing processing module 102 and BSC sidelinks control module 103 interconnect, TRAU side load sharing processing module 105 and TRAU sidelinks control module 106 interconnect, described BSC sidelinks control module 103 is connected with TRAU sidelinks control module 106, and
BSC side load sharing processing module 102 is used to realize the load sharing processing of BSC sidelinks;
TRAU side load sharing processing module 105 is used to realize the load sharing processing of TRAU sidelinks;
BSC sidelinks control module 103 is used for the BSC sidelinks is controlled to realize the reliability of BSC sidelinks;
TRAU sidelinks control module 106 is used for the TRAU sidelinks is controlled to realize the reliability of TRAU sidelinks.
Preferably, BSC side load sharing processing module 102 comprises BSC side Message Transfer Part MTP3 module and BSC side SCCP SCCP module, TRAU side load sharing processing module 105 comprises TRAU side MTP3 module and TRAU side SCCP module, wherein BSC side MTP3 module is connected with BSC side SCCP module, and TRAU side MTP3 module is connected with TRAU side SCCP module.More preferably, BSC sidelinks control module 103 is a BSC side MTP2 module, and described TRAU sidelinks control module 106 is a TRAU side MTP2 module.Alternatively, BSC sidelinks control module 103 can be BSC side MC PPP module, and described TRAU sidelinks control module 106 can be TRAU side MC PPP module.
Wherein, connection between BSC sidelinks control module 103 and the TRAU sidelinks control module 106 can be the connection that is made of at least one E1 circuit, and the time slot that 32 64kbit/s are wherein arranged on every E1 circuit, the sub-slots that each time slot resolves into 4 16kbit/s to be being used for transferring voice, and can not decompose when command transmitting.
Based on Fig. 1, Fig. 2 is according to the BSC side of the embodiment of the invention and the structural representation of the information interaction system between the TRAU side.As shown in Figure 2, this system comprises BSC 201 and zooms out the TRAU202 of placement, wherein the SCCP module 203 of BSC side and MTP3 module 204 are corresponding to the load balancing processing module 102 of BSC side among Fig. 1, and the MTP2 module 205 of BSC side is corresponding to the link control module 103 of BSC side among Fig. 1.The SCCP module 206 of TRAU side and MTP3 module 207 are corresponding to the load balancing processing module 105 of TRAU side among Fig. 1, and the MTP2 module 208 of TRAU side is corresponding to the link control module 106 of BSC side among Fig. 1.The external interface of BSC and equipment of the core network 209 is the A interface, and BSC 201 is an Ater Interface with the TRAU202 internal interface, can shared Signaling System Number 7.
In specific implementation, can be signaling processing plate and transmission process plate with the local side physics realization of BSC preferably, TRAU also physics realization be physical locations such as signaling processing plate and transmission process plate.Such as, be integrated with SCCP module and MTP3 module on the signaling processing plate, be integrated with the MTP2 module on the transmission process plate.At this moment, the processing of voice is by arriving BSC transmission process plate again from equipment of the core network 209 to TRAU transmission process plates.Wherein MSC 209 to TRAU transmission process plates are handled in the core net machine room, can adopt the PCM voice channel of common 64kbit/s.TRAU transmission process plate realizes by long-distance transmissions to BSC transmission process plate, and this moment, voice signal was compressed to 16kbit/s, and required transmission bandwidth has only original 1/4.The processing of A interface signaling to the TRAU signaling processing plate, is arrived TRAU transmission process plate from MSC209 again, terminates in the BSC signaling processing plate through BSC transmission process plate then.
The processing of Ater Interface signaling is arrived TRAU transmission process plate again from the signaling processing plate of TRAU, passes through the local transmission board of BSC then, terminates in the BSC signaling processing plate.That is to say that the signaling of Ater Interface is carried out between BSC this locality and TRAU extension unit.
Embedding SCCP module and MTP3 module are handled high-level signaling in the TRAU signaling processing plate, embed the MTP2 module and come the processing logic link in transmission board.Wherein signal command board can be handled the signaling link of polylith transmission board, by the configuration binding, just specifies the method for signaling processing plate for every logical links and realizes.Because the interface (A interface) of BSC and MSC itself just needs signalling system No.7 to handle, therefore on BSC this locality can shared signal command board existing software (such as, SCCP and MTP process software), carry out BSC this locality frame and zoom out communicating by letter between the frame.
Fig. 3 is from BSC side direction TRAU side method of transmitting information exemplary flow chart according to the present invention.
As shown in Figure 3, comprising:
Step 301: the load of TRAU sidelinks is shared to select the link of transmission information.
Step 302: described link is controlled realizing the reliability of this TRAU sidelinks, and by this link with message transmission to the BSC side.
Wherein, can receive the call treatment message that comes from the TRAU side in advance, step 301 can comprise: at first, described call treatment message is analyzed the resource allocation message of BSC sidelinks load being shared to determine; Then described resource allocation message is added source address and destination address, and utilize link ID to distinguish the link that different logical links is selected the information of transmitting., can adopt the dynamic polling of link to share to the load of BSC sidelinks here, and institute's information transmitted both can be signaling information, can be again voice messaging.
Fig. 4 is from TRAU side direction BSC side method of transmitting information exemplary flow chart according to the present invention.As shown in Figure 4, comprising:
Step 401: the load of TRAU sidelinks is shared to select the link of transmission information;
Step 402: described link is controlled realizing the reliability of this TRAU sidelinks, and by this link with message transmission to the BSC side.
Wherein, can receive the call treatment message that comes from the BSC side in advance, step 401 can comprise: at first, described call treatment message is analyzed the resource allocation message of TRAU sidelinks load being shared to determine; Then described resource allocation message is added source address and destination address, and utilize link ID to distinguish the link that different logical links is selected the information of transmitting., can adopt the dynamic polling of link to share to the load of TRAU sidelinks here, and institute's information transmitted both can be signaling information, can be again voice messaging.
For realizing the reliable communication between local APP of BSC and the TRAU APP, still be the TRAU side no matter in the BSC side, the SCCP module all needs to bear the function of signaling control, and MTP module (comprising MTP the 3rd functional level and MTP the 2nd functional level) realizes the function of Message Transfer Part, and its core is deferred to Q.7XX serial protocols of ITU-T fully.The MTP3 module is mainly finished the link load sharing function, and the MTP2 module mainly realizes the reliability of link.The SCCP module mainly is responsible for providing connection and connectionless service to high level.
The signaling link function that the MTP2 module realizes comprises: frame demarcation, filling and error-detecting, carry out error correction with retransmitting, link failure supervision etc. owing to the realization of above function, have improved the reliability of signaling link greatly.The MTP3 module realizes " signaling message processing " and " signaling network management " function, be collectively referred to as " signaling network functions ", mainly realize " signalling link load is shared " by signaling message routing (being dynamic assignment signaling link selection SLS), under the situation that network condition changes, the MTP3 module can be controlled reconfiguring of SLS and pre-configured mask, thereby keeps or recover normal message transmission capacity.
Q.704 stipulate two kinds of load stepping modes at ITU-T, preferably adopted Mode A, promptly in a signaling link set, carried out load sharing.Link set is closed one group of all identical link of destination signaling point by Original Signaling Point and is formed.In order to realize load sharing, MTP3 has adopted two kinds of codings, i.e. " signaling link selection " SLS and " signaling link code " SLC.The latter is made up of 4 bit, is used for distinguishing in a link set different links.It is 16 that 4 bit have limited the link maximum quantity.
SLS is placed directly in the routing tag of MTP3 head, and the method for employing polling is selected the link of current use, reaches the purpose of link set internal load equilibrium.When the MTP2 module reported certain bar link failure, the MTP3 module can be deleted it from available resources, guaranteed that all the time load is even as far as possible on the available link.
When the MTP2 module detects fault recovery, can add the recovered link coding in the available resource pool to again.
Wherein, the form of the MTP routing tag that preferably adopts of the present invention as shown in Figure 5.
For configuration MTP physical link, can get some E1, fixedly get certain time slot (for example No. 16 time slots) and give the MTP2 link on every E1 line, many MTP2 links are tied to certain MTP3 module by data configuration, wherein so-called binding is exactly a kind of semifixed corresponding relation.
For example, a MTP3 module, 16 MTP2 links have been bound in configuration, have so just set up a semifixed relation in this MTP3 module and 16 64kbit/s time slots.Have only when user's modification disposes and can change this relation.
The MTP3 module can realize automatic load sharing on 16 signaling links that have been configured.Because it is corresponding one by one physically that BSC this locality and TRAU zoom out side, therefore can do a lot of simplification and handle in the configuration of Signaling System Number 7, signalling point, signalling route, link set etc. can fixedly write in code, do not need the user to dispose.The user only disposes top said MTP2 physical link, MTP3-MTP2 binding relationship.
Have fault detect and link detecting function on the MTP2 module, in case link occurs reporting to the MTP3 module immediately unusually, the MTP3 module realizes load sharing function.
Therefore, the reduced data configuration sequence of Signaling System Number 7 can reduce: dispose MTP2 physical link and logical links earlier, dispose the MTP3-MTP2 binding relationship again.
Fig. 6 is an exemplary method flowchart of transmitting information according to an embodiment of the invention from BSC side direction TRAU side.As shown in Figure 6, this method comprises:
Step 601: the call treatment message from MSC comes through the A interface, arrives BSC;
After step 602:BSC analyzes this call treatment message,, then send " resource allocation request " message to BSC side load sharing processing module (SCCP+MTP3) if distribution T RAU resource is wanted in decision;
Step 603:BSC side load sharing processing module adds source address and destination address to " resource allocation request " message, by the load sharing algorithm, select suitable data link (distinguishing different logical links), send to corresponding BSC side data link control module by link ID;
Step 604:BSC side data link control module adds controlling links packet header with above-mentioned message, sends to BSC side physical layer; BSC side physical layer sends to TRAU side physical layer with data; After TRAU side physical layer receives data and unpacks, issue TRAU side data link control module;
Step 605:TRAU side data link control module verification control packet header if find mistake, then requires BSC to stress to pass, up to receiving right-on data; Then, TRAU side data link control module sends to TRAU side load sharing processing module with data, and TRAU side load sharing processing module unpacks message, carries out resource allocation process; If resource allocation is normal, TRAU sends " resource allocation response " message to TRAU side load sharing processing module;
Step 606:TRAU side load sharing processing module adds source address and destination address to " resource allocation response " message, by the load sharing algorithm, select suitable data link (distinguishing different logical links), send to corresponding TRAU side data link control module by link ID; TRAU side data link control module adds controlling links packet header to above-mentioned message, sends to TRAU side physical layer; TRAU side physical layer sends to BSC side physical layer with data; After BSC side physical layer reception data unpack, issue BSC side data link control module; BSC side data link control module verification control packet header if find mistake, then requires TRAU to stress to pass, and sends to BSC side load sharing processing module after receiving right-on data; BSC side load sharing processing module unpacks message and carries out resource allocation process.
After step 607:BSC side load sharing processing module was finished resource allocation, BSC sent the call treatment response message to MSC, through the A interface, got back to MSC, finishes call proceeding then and handle between MSC and BSC.
Though more than be that example specifically describes realization of the present invention with the downstream message, obviously this only is exemplary, and and is not used in the present invention is limited.Upstream message similarly, the present invention no longer tires out this and states.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1, a kind of information interaction system, it is characterized in that, this system comprises base station controller BSC and speech coding conversion and Rate Adapter Unit TRAU, described TRAU and described BSC zoom out, the BSC side comprises BSC side load sharing processing module and BSC sidelinks control module, the TRAU side comprises TRAU side load sharing processing module and TRAU sidelinks control module, wherein BSC side load sharing processing module and BSC sidelinks control module interconnect, TRAU side load sharing processing module and TRAU sidelinks control module interconnect, described BSC sidelinks control module is connected with TRAU sidelinks control module, and
BSC side load sharing processing module is used to realize the load sharing processing of BSC sidelinks;
TRAU side load sharing processing module is used to realize the load sharing processing of TRAU sidelinks;
BSC sidelinks control module is used for the BSC sidelinks is controlled to realize the reliability of BSC sidelinks;
TRAU sidelinks control module is used for the TRAU sidelinks is controlled to realize the reliability of TRAU sidelinks;
Wherein said BSC side load sharing processing module comprises BSC side Message Transfer Part MTP3 module and BSC side SCCP SCCP module, described TRAU side load sharing processing module comprises TRAU side MTP3 module and TRAU side SCCP module, wherein BSC side MTP3 module is connected with BSC side SCCP module, and TRAU side MTP3 module is connected with TRAU side SCCP module.
2, information interaction system according to claim 1 is characterized in that, described BSC sidelinks control module is a BSC side MTP2 module, and described TRAU sidelinks control module is a TRAU side MTP2 module.
3, information interaction system according to claim 1 is characterized in that, described BSC sidelinks control module is a BSC side binding multiple channels point-to-point protocol MC PPP module, and described TRAU sidelinks control module is a TRAU side MC PPP module.
4, information interaction system according to claim 1 is characterized in that, being connected between described BSC sidelinks control module and the TRAU sidelinks control module: the connection that is made of at least one E1 circuit.
5, a kind ofly it is characterized in that from BSC side direction TRAU side method of transmitting information described TRAU and described BSC zoom out, this method comprises:
A1, adopt the dynamic polling of link to share to select the link of transmission information to the load of BSC sidelinks;
B1, described link is controlled realizing the reliability of this BSC sidelinks, and by this link with message transmission to the TRAU side.
6, method according to claim 5 is characterized in that, this method comprised that before steps A 1 reception comes from the call treatment message of TRAU side;
Steps A 1 comprises:
A11, described call treatment message is analyzed to determine whether sending resource allocation message to TRAU;
A21, described resource allocation message is added source address and destination address, and utilize link ID to distinguish different logical links, and carry out load sharing, to select the link of transmission information by the dynamic polling of link.
According to claim 5 or 6 described methods, it is characterized in that 7, institute's information transmitted is signaling information or voice messaging.
8, a kind ofly it is characterized in that from TRAU side direction BSC side method of transmitting information described TRAU and described BSC zoom out, this method comprises:
A2, adopt the dynamic polling of link to share to select the link of transmission information to the load of TRAU sidelinks;
B2, described link is controlled realizing the reliability of this TRAU sidelinks, and by this link with message transmission to the BSC side.
9, method according to claim 8 is characterized in that, this method comprised that before steps A 2 reception comes from the call treatment message of BSC side;
Steps A 2 comprises:
A21, described call treatment message is analyzed to determine whether responding the resource allocation response message to BSC;
A22, described resource allocation response message is added source address and destination address, and utilize link ID to distinguish different logical links, and carry out load sharing, to select the link of transmission information by the dynamic polling of link.
10, according to Claim 8 or 9 described methods, it is characterized in that institute's information transmitted is signaling information or voice messaging.
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