CN1901742A - Channel switching method - Google Patents
Channel switching method Download PDFInfo
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- CN1901742A CN1901742A CNA200610061776XA CN200610061776A CN1901742A CN 1901742 A CN1901742 A CN 1901742A CN A200610061776X A CNA200610061776X A CN A200610061776XA CN 200610061776 A CN200610061776 A CN 200610061776A CN 1901742 A CN1901742 A CN 1901742A
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Abstract
This invention discloses a channel switch method including: a source BSC asks for switching channels to MSCe, which informs MGW to set up load with target BSC to inform the MSCe, which informs source BSC and it informs the mobile station for switching and the mobile station switches signals to the channel of the BSC, the switch of inter-office channels includes: the source BSC requires for switching channels to the source MSCe, which informs MGW1 and target MSCe to get ready for setting up load, target MSCe informs MGW2 and target BSC to get ready for setting up load, after setting up the load, MGW1 informs source MSCe, which informs source BSC and BSC informs the mobile station for switch, which switches the signal to the channel of the BSC.
Description
Technical field
The present invention relates to packet switching network technical field and next generation network (NGN, NextGeneration Networks) technical field, be specifically related to a kind of channel switching method.
Background technology
As shown in Figure 1, the traditional circuit domain structure, MSC (Mobile Switching Center, mobile switching centre) and BSC (Base Station Controller, base station controller) directly uses TDM (Time Division Multiplex, time division multiplexing) circuit to connect and carry speech channel.As shown in Figure 2, after the employing soft switch structure, control separates with carrying, MSC is divided into two part: MSCe (MobileSwitching Center, mobile switching centre) and MGW (Media Gateway, media gateway), when adopting TDM carrying speech channel, the TDM circuit is received on the MGW.After A mouth (interface of BSC and MSC) the carrying speech channel IPization, originally the voice with the TDM carrying transmit by the IP bearer network.The E mouth is the interface between MSC, originally switches between MSC and uses the TDM circuit, and after the E mouth IPization, voice transmit by the IP bearer network, switch between MSC and are finished by the IP bearer network, and it also is to be finished by the IP bearer network that intra-office switches, and the networking structure of flexible exchanging network as shown in Figure 3.
Switch (Handoff) and be meant terminal in communication process, owing to variation or other reason of terminal location, signal has guaranteed the continuity of conversation from the process of a channel access one other channel by switching.Switch and divide soft handover, direct-cut operation.The principal character of soft handover is that terminal does not disconnect and being connected of former channel in the handoff procedure.The principal character of direct-cut operation is: when beginning to switch, being connected of disconnection earlier and former channel reattempts and inserts new channel, and direct-cut operation generally wants MSC to participate in.The intra-office that switches in the same MSC between different B SC switches, and strides the inter-office switchover that switches to of MSC.
When the A mouth adopted the TDM circuit, the intra-office handoff procedure was as follows substantially: source BSC sends HANDOFF REQUIRED (handover request message) notice MSC, has Target cell number; MSC tables look-up and knows the BSC at Target cell place, be target BS C, distribute the land circuit between MSC and target BS C, send HANDOFF REQUEST (handoff request message) notification target BSC to target BS C, the CIC (Circuit Identification Code, cic circuit identification code) that has distribution; Target BS C informing base station prepares to eat dishes without rice or wine channel, and after the assignment land circuit and the channel of eating dishes without rice or wine were ready to, target BS C sent HANDOFF REQUEST ACK (handover request ack message) notice MSC; MSC, is switched by source BSC notice terminal target BS C side channel information notification source BSC by HANDOFF COMMAND (switching command message); The terminal disconnection is connected with former channel, attempts inserting target BS C side channel; After switching was finished, target BS C sent HANDOFF COMPLETE (finishing switching message) notice MSC, and MSC discharges corresponding resource.
After the A mouth IPization, the intra-office handoff procedure substantially as above, difference is: MSCe is before target BS C sends HANDOFF REQUEST, send ADD (request increases end points message) to MGW, apply for an IP end points (in fact the IP end points is exactly the logical terminal (LTERM)), then, MSCe sends HANDOFF REQUEST message to target BS C, carries the IP terminal point information on the MGW in this message; Target BS C carries the IP terminal point information that target BS C distributes in HANDOFF REQUEST ACK message; After MSCe receives, bring MGW the IP terminal point information of target BS C, to set up the IP carrying between MGW and target BS C with MODIFY (revising terminal point information message).
As shown in Figure 4, after the A mouth IPization, intra-office channel switching flow is as follows:
A, in MS (Mobile Station, travelling carriage) voice call process, source BSC sends HANDOFF REQUIRED request to MSCe and switches, and has wherein carried the switching target small area tabulation;
B, MSCe analyze the sub-district in the Target cell tabulation, and discovery need switch to local exchange, and MSCe sends IP end points of ADD message request to MGW, and this IP end points is used for being connected with the IP end points 10 of target BS C, is illustrated in figure 4 as IP end points 9;
C, MGW return the IP address information of IP end points 9;
After d, MSCe receive the REPLY response message of MGW, send HANDOFF REQUEST message, wherein carried the encoding and decoding tabulation and the IP address information of IP end points 9 to target BS C;
E, target BS C distribute corresponding channel and IP end points 10 after receiving the HANDOFF REQUEST message of MSCe, prepare to set up carrying with MGW; Send empty forward traffic channel frame to MS; Return HANDOFF REQUEST ACK message to MSCe then, wherein carry IP address and first encoding and decoding of IP end points 10, wait for that then MS arrives the channel that is distributed;
After f, MSCe receive the HANDOFF REQUEST ACK message of target BS C, issue MODIFY message to MGW, carry the beared information of the IP end points 9 that requires the MGW change and the IP address information of target BS C, MGW changes the beared information of IP end points 9, so that set up the carrying between MGW and target BS C;
G, MGW return the REPLY response message to MSCe, begin to set up carrying;
After h, MSCe receive the REPLY response message of MGW, send HANDOFF COMMAND message to source BSC;
After i, source BSC receive this HANDOFF COMMAND message, send HANDOFF COMMAND message to MS, after MS replied, source BSC sent HANDOFF COMMENCED (switching beginning message) to MSCe;
After j, MS brought into use the channel of target BS C distribution, target BS C sent HANDOFF COMPLETE (handoff completion message) to MSCe;
K, MSCe issue SUBTRACT (deletion end points command messages), request deletion IP end points 5 to MGW;
L, MSCe initiate CLEAR REQUEST (disconnect command message) to source BSC, and being connected between MSCe and source BSC removed in request;
M, MGW return the REPLY response message to MSCe;
N, source BSC send CLEAR COMPLETE (take out stitches and finish message) to MSCe after discharging resource, and MSCe discharges resources such as land circuit and Traffic Channel.
The difference that inter-office switchover and intra-office switch mainly is in the transmission of inter-office switchover signaling and increases the foundation that interoffice carries.
As shown in Figure 5, after the A mouth IPization, the flow process that the interoffice forward channel is switched is as follows:
A, in MS voice call process, source BSC sends HANDOFF REQUIRED message to controlling MSC e (AMSCe, AnchorMSCe, Controlling MSC), the Target cell that carries is the sub-district among the service MSCe (SMSCe, Service MSCe);
B, AMSCe send ADD message to MGW1, and request MGW1 distributes an IP end points 7, and IP end points 7 will be used for being connected with the IP end points of the MGW2 of SMSCe control (following step MGW2 distribute be IP end points 8), so that set up carrying between MGW1 and the MGW2;
C, MGW1 return the REPLY response message to AMSCe, wherein carry the IP address information of IP end points 7;
D, AMSCe send FACDIR2 (equipment Indication message) to SMSCe, parameter I nterMSCCircuitID wherein is vCIC (Virtual Circuit Identification Code, the virtual circuit identification code), by INVITE the IP terminal point information of MGW1 and encoding and decoding tabulation are sent to SMSCe simultaneously, SMSCe comes the FACDIR2 message of related MAP (Mobile Application Part, MAP) and the INVITE of SIP according to vCIC;
E, SMSCe will wait for that FACDIR2 and INVITE all receive, just carry out follow-up processing;
F, SMSCe send ADD message to MGW2, and request MGW2 prepares 2 IP end points, and one is the IP end points 8 that is connected with AMSCe side MGW1, and another is the IP end points 9 (target BS C end points 10 is connected with MGW2 upper extreme point 9) that is connected with target BS C;
G, MGW2 return the REPLY response message, wherein carry the IP address information of IP end points 8 and IP end points 9;
H, receive the REPLY response message of MGW2 after, SMSCe sends HANDOFF REQUEST message, the IP address information of band codec capability list and IP end points 9 to target BS C;
I, target BS C return HANDOFF REQUEST ACK message to SMSCe, wherein carry the encoding and decoding and the IP address information of the IP end points 10 of target BS C;
After j, SMSCe receive HANDOFF REQUEST ACK message, issue the MODIFY order to MGW2, the IP terminal point information of wherein carrying target BS C, MGW2 revises the beared information of IP end points 9, so that the carrying between foundation and the target BS C;
K, MGW2 return the REPLY response message to SMSCe after receiving the MODIFY order, begin to set up carrying;
L, SMSCe issue the MODIFY order to MGW2, the IP terminal point information of wherein carrying the MGW1 of AMSCe side, and MGW2 revises the beared information of IP end points 8;
M, MGW2 return the REPLY response message to SMSCe after receiving the MODIFY order, begin to set up carrying;
N, SMSCe send facdir2 message (facdir2 is the response message to FACDIR2) to AMSCe;
O, SMSCe send 200 OK message to AMSCe, carry the IP address and the coding/decoding information of IP end points 8;
After p, AMSCe receive 200 OK message, send MODIFY message, wherein carry the IP address information of the IP end points 7 of the address information of IP end points 8 of the MGW2 that requires its modification and MGW1, so that set up carrying to MGW2;
After q, MGW2 receive MODIFY, return the REPLY response message, begin to set up carrying to AMSCe;
R, AMSCe send ACK message to SMSCe, the 200OK message that response front SMSCe sends;
S, AMSCe promptly send HANDOFFCOMMAND message to source BSC after receiving facdir2 message;
T, source BSC send HANDOFF COMMENCED message to AMSCe;
After u, switching were finished, target BS C sent HANDOFF COMPLETE message to SMSCe;
V, SMSCe send MSONCH (Mobile On Channel) message to AMSCe, and notice AMSCe switching is finished;
After w, AMSCe receive MSONCH message from SMSCe, send SUBTRACT message, the IP end points 5 that uses before the request deletion is switched (IP end points 5 is the IP end points that use before switching) to MGW1;
X, AMSCe send CLEARCOMMAND message to source BSC;
Y, MGW1 return the REPLY response message to AMSCe;
Z, source BSC send HANDOFF COMPLETE message to AMSCe.The flow process that intra-office switches and the interoffice forward direction switches to based on the IP bearer network that provides from above describes in detail as can be seen, though the time started is set up in the carrying of IP network will be early than the time of switching beginning, when but reality realizes this flow process, very possible switching is finished, but the carrying of IP network is not also set up, MS finishes this preceding section in the period to carrying foundation after switching to new channel so, just might can't converse; If failure is set up in the IP network carrying, finish but switch, just can only dismantling call.Prior art does not provide the technical scheme that overcomes this defective.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of channel switching method based on the IP bearer network, overcomes the shortcoming of finishing prior to the channel switching of finishing that prior art can not guarantee that the IP network carrying is set up in the channel switching process.
The present invention adopts following technical scheme:
A kind of channel switching method, the switching of intra-office channel comprises step:
A1, source base station controller are asked switching channels to mobile switching centre;
A2, mobile switching centre's notice media gateway, media gateway and target base station controller are set up carrying back notice mobile switching centre;
A3, mobile switching centre send the message of switching to the source base station controller, source base station controller notice travelling carriage, and travelling carriage switches to the channel that target base station controller distributes with signal.
Described channel switching method, comprising steps A 4: mobile switching centre, source base station controller and media gateway discharge resource separately.
Described channel switching method, wherein said steps A 2 comprises step: if can not set up carrying, then notify mobile switching centre between media gateway and the target base station controller; Mobile switching centre sends the message that refusal switches to the source base station controller.
Described channel switching method, wherein said steps A 2 comprises step: if set up carrying between time media gateway of surpass setting and the target base station controller, mobile switching centre sends the message that refusal switches to the source base station controller.
Described channel switching method, wherein said steps A 2 comprises step: mobile switching centre uses modification far-end carrying attribute order notice media gateway, revises to comprise to carry to set up in the order of far-end carrying attribute and finishes the notice request cell.
A kind of channel switching method, the interexchange channel switching comprises step:
B1, source base station controller are to source mobile switching centre request switching channels;
B2, source mobile switching centre notify first media gateway and target mobile switching centre, target mobile switching centre notifies second media gateway and target base station controller, after setting up carrying between between first media gateway and second media gateway and second media gateway and the target base station controller, by the first media gateway notification source mobile switching centre;
B3, source mobile switching centre send the message of switching to the source base station controller, source base station controller notice travelling carriage, and travelling carriage switches to the channel that target base station controller distributes with signal.
Described channel switching method, comprising step B4: source mobile switching centre, source base station controller, first media gateway discharge resource separately.
Described channel switching method, wherein said step B2 comprises step: after setting up carrying between first media gateway, second media gateway and the target base station controller, by target base station controller notification target mobile switching centre, again by notification source mobile switching centre of target mobile switching centre.
Described channel switching method, wherein said step B2 comprises step: if can not set up carrying between first media gateway, second media gateway and the target base station controller, the first media gateway notification source mobile switching centre; Source mobile switching centre sends the message that refusal switches to the source base station controller.
Described channel switching method, wherein said step B2 comprises step: if can not set up carrying between first media gateway, second media gateway and the target base station controller, target base station controller notification target mobile switching centre is again by notification source mobile switching centre of target mobile switching centre; Source mobile switching centre sends the message that refusal switches to the source base station controller.
Described channel switching method, wherein said step B2 comprises step: do not set up carrying between time first media gateway, second media gateway and the target base station controller of setting if surpass, source mobile switching centre sends the message that refusal switches to the source base station controller.
Described channel switching method, wherein: when the interoffice channel switched to the forward direction switching, source mobile switching centre was a Controlling MSC, and target mobile switching centre is a serving mobile switching center.
Described channel switching method, wherein: when the interoffice channel switched to the back to switching, source mobile switching centre was a serving mobile switching center, and target mobile switching centre is a Controlling MSC.
Described channel switching method, wherein said step B2 comprises step: source mobile switching centre uses the order of modification far-end carrying attribute to notify first media gateway, comprises carrying foundation in the order of modification far-end carrying attribute and finishes the notice request cell.
The present invention adopts carrying to set up the technological means of back notice mobile switching centre, Controlling MSC or serving mobile switching center, has guaranteed can not occur after channel switches the fault of dropped calls, has improved the channel quality of handoff; If failure is set up in carrying, can return to the state before channel switches, therefore improved the stability of speech quality.
Description of drawings
The present invention includes following accompanying drawing:
Fig. 1 is the schematic diagram that prior art MSC and BSC adopt TDM circuit carrying speech channel;
Fig. 2 is a prior art soft switch structural representation;
Fig. 3 is the networking structure schematic diagram of prior art flexible exchanging network;
Fig. 4 is the intra-office switching flow figure under the prior art IP bearing mode;
Fig. 5 is the interoffice forward direction switching flow figure under the prior art IP bearing mode;
Fig. 6 is the intra-office switching flow figure under the IP bearing mode of the present invention;
Fig. 7 is the interoffice forward direction switching flow figure under the IP bearing mode of the present invention.
Embodiment
Below in conjunction with drawings and Examples the present invention is described in further detail:
Main points of the present invention are no matter be that the intra-office channel switches or inter-office switchover, notice mobile switching centre or Controlling MSC are earlier set up in carrying, switch by mobile switching centre or Controlling MSC notification source base station controller again, having finished with regard to not switching like this and having carried does not also have the situation set up, thereby has guaranteed the channel quality of handoff; Consider extreme case, if carrying is set up overtime or failure, just refusal switches.
The present invention will be described below by specific embodiment.
As shown in Figure 6, as follows based on the intra-office channel switching flow of IP bearer network:
A, in MS speech business communication process, source BSC sends HLANDOFFREQUIRED message (handover request message) request switching channels to MSCe, has wherein comprised the Target cell tabulation;
B, MSCe analyze the sub-district in the Target cell tabulation, and discovery need switch to local exchange, and MSCe sends ADD message (request increases end points message) request to MGW and distributes 1 IP end points that is connected with target BS C;
C, MGW send the REPLY response message to MSCe, return the IP address information of the IP end points 9 of distribution;
After d, MSCe receive the REPLY response message of MGW, send the HANDOFF REQUEST message of 9 encoding and decoding tabulation of band IP end points and IP address information to target BS C;
After e, target BS C receive HANDOFF REQUEST message,, prepare to set up carrying, send empty forward traffic channel frame to MS for MS distributes corresponding channel and distributing IP resource; Return HANDOFF REQUEST ACK message to MSCe then, wherein carry target BS C and be used for setting up the IP address and the encoding and decoding tabulation of the IP end points 10 of carrying with MGW, first is exactly the encoding and decoding that will set up carrying with MGW in the encoding and decoding tabulation, waits for that then the signal of MS arrives the channel that is distributed;
After f, MSCe receive the HANDOFF REQUEST ACK message of target BS C, issue the MODIFY order to MGW, carry the IP address information of the IP end points 10 that requires its beared information of changing IP end points 9 and target BS C, and in MODIFY order (revising the order of far-end carrying attribute), increase carrying and set up and finish the notice request cell, require MGW to set up and report the incident of setting up of carrying by NOTIFY (notification message) after finishing in carrying;
After g, MGW receive MODIFY message, return the REPLY response message, and set up carrying between beginning and the target BS C to MSCe;
H, carrying are set up and are finished and success, and MGW sends NOTIFY (notification message) to MSCe, and notice MSCe carrying is set up and finished; If failure is set up in carrying, MGW can send RELEASE message (release message related to resources) to MSCe, and at this moment MSCe issues HANDOFF REJECT message (refusal switches message) for source BSC, and refusal switches;
I, MSCe send HANDOFF COMMAND message to source BSC after receiving that the NOTIFY of finishing is set up in MGW notice IP carrying;
J, MSCe send REPLY affirmation NOTIFY to MGW and receive;
After k, source BSC receive HANDOFF COMMAND message, send switching command message to MS, after MS replied, source BSC sent HANDOFFCOMMENCED message to MSCe;
After the signal of l, MS switched to the channel of target BS C distribution, target BS C sent HANDOFF COMPLETE message to MSCe;
M, MSCe send SUBTRACT message to MGW, the IP end points 5 that uses before the request deletion is switched (end points 5 is the IP end points that use before switching);
N, MSCe send CLEAR REQUEST order to source BSC, being connected between request cancellation MSCe and source BSC;
O, MGW return the REPLY response message to MSCe;
P, source BSC send CLEAR COMPLETE message to MSCe after discharging resource, and MSCe discharges resources such as land circuit and Traffic Channel.
As shown in Figure 7, interoffice forward channel switching flow is as follows:
A, in MS speech business communication process, source BSC sends HANDOFF REQUIRED message to AMSCe (Controlling MSC), the Target cell that wherein carries tabulation is the sub-district among the SMSCe (serving mobile switching center);
B, AMSCe send ADD message request MGW1 to MGW1 (first media gateway) and distribute an IP end points 7 (IP end points 7 is used for being connected with the IP end points 8 of the MGW2 of SMSCe control, sets up and carries);
C, MGWI return the REPLY response message to AMSCe, wherein carry the IP address information of IP end points 7;
D, AMSCe send FACDIR2 message (equipment Indication message) to SMSCe, wherein the value of parameter I nterMSCCircuitID is vCIC, by INVITE the IP terminal point information of MGW1 and encoding and decoding tabulation are sent to SMSCe simultaneously, SMSCe comes related FACDIR2 message and INVITE according to vCIC;
E, SMSCe will wait for that FACDIR2 and INVITE are all received and just carry out follow-up processing;
F, SMSCe send 2 IP end points of ADD message request to MGW2 (second media gateway), and 8, one of IP end points that are MGW1 with AMSCe control sets up carrying is the IP end points 9 that is connected with target BS C (target BS C be connected with MGW2 be end points 10);
G, MGW2 send REPLY message to SMSCe, return the IP address information of IP end points 8 and IP end points 9;
H, receive the REPLY message of MGW2 after, SMSCe sends HANDOFF REQUEST message, the IP address information of band codec capability list and IP end points 9 to target BS C;
I, target BS C return HANDOFF REQUEST ACK message, the IP address information of wherein carrying IP end points 10 to SMSCe;
After j, SMSCe receive HANDOFF REQUEST ACK, issue the MODIFY order to MGW2, carry the IP terminal point information of the beared information and the target BS C of the IP end points 9 that requires its modification, carrying is set up in request, and the notice request cell is finished in increase carrying foundation in MODIFY orders, and requires MGW2 to report the incident of setting up of carrying by NOTIFY after carrying foundation is finished;
K, MGW2 return the REPLY response message to SMSCe after receiving the MODIFY order;
After l, SMSCe receive HANDOFF REQUEST ACK, issue MODIFY order, carry the beared information of the IP end points 7 of the beared information of the IP end points 8 that requires its modification and MGW1 to MGW2; Request foundation carrying, and the notice request cell is finished in increase carrying foundation in MODIFY orders, and requires MGW2 to report the incident of setting up of carrying by NOTIFY after carrying foundation is finished;
M, MGW2 return the REPLY response message to SMSCe after receiving the MODIFY order;
After IP carrying between the IP end points 9 of n, MGW2 and the IP end points 10 of target BS C was set up and finished, MGW2 sent NOTIFY to SMSCe, reported carrying to set up the incident of finishing;
O, SMSCe send REPLY affirmation NOTIFY to MGW2 and receive;
After p, SMSCe receive NOTIFY, (200 OK are the response messages to INVITE here to send FACDIR2 message and 200 OK message to AMSCe, just send this two message as long as receive the NOTIFY that MGW2 and target BS C carrying is set up after finishing, the carrying between SMSCe and the AMSCe is set up and is waited for by AMSCe);
After q, AMSCe receive 200 OK message, AMSCe sends MODIFY message to MGW1, carry the IP address information of the IP end points 8 of IP end points 8 address informations of MGW1 and MGW2, and the event detection request is set up in the increase carrying in MODIFY message, require MGW1 to report carrying to set up incident, the address information of MGW1 change IP end points 8;
R, MGW1 return the REPLY response message to AMSCe after receiving the MODIFY message of AMSCe, begin to set up carrying;
T, SMSCe send REPLY affirmation NOTIFY to MGW2 and receive;
U, AMSCe send ACK message to SMSCe, the 200OK message that response front SMSCe sends;
W, AMSCe send HANDOFF COMMAND message to source BSC after receiving the NOTIFY of MGW1;
X, AMSCe send REPLY affirmation NOTIFY to MGW1 and receive;
Y, source BSC send HANDOFF COMMENCED message to AMSCe;
After z, switching were finished, target BS C sent HANDOFF COMPLETE message to SMSCe;
Z1, SMSCe send MSONCH message to AMSCe, and the notice switching is finished;
Z2, AMSCe are after the MSONCH message of receiving from SMSCe, and AMSCe sends SUBTRACT message to MGW1, the IP end points 5 that uses before the request deletion is switched (IP end points 5 is the IP end points that use before switching);
Z3, AMSCe send CLEAR COMMAND message to source BSC, and begin to discharge the resource of switching preceding use;
Z4, MGW1 return the REPLY response message to AMSCe;
Z5, source BSC return CLEAR COMPLETE message to AMSCe after discharging resource.
Similar behind the interoffice to channel switching processing flow process and interoffice forward channel hand-off process flow process, therefore repeat no more.
Be to have increased carrying to set up the Modify message format of finishing the notice request cell below:
MEGACO/1[123.123.123.4]：55555
Transaction＝10005{
Context＝2000{
Modify＝A5555{
Media{
Stream＝1{
LocalControl{Mode＝SendReceive}}}，
Events＝1234{nt/be}，；bearer?established?notify
}，
Modify＝A4445{
Media{
Stream＝1{
Remote{
v＝0
c＝IN?IP4?125.125.125.111
m＝audio?1111?RTP/AVP?4
}
}；RTP?profile?for?G.723?is?4
}
}
}
}
Be the Notify message format of response Modify message below:
MEGACO/1[123.123.123.4]：55555
Transaction＝50005{
Context＝5000{
Notify＝A5555{ObservedEvents＝1234{
19990729T22020002：nt/be}}
}
}
Though pass through with reference to the preferred embodiments of the present invention, the present invention is illustrated and describes, but those of ordinary skill in the art should be understood that, can do various changes to it in the form and details, and the spirit and scope of the present invention that do not depart from appended claims and limited.
Claims (14)
1, a kind of channel switching method is characterized in that, the switching of intra-office channel comprises step:
A1, source base station controller are asked switching channels to mobile switching centre;
A2, mobile switching centre's notice media gateway, media gateway and target base station controller are set up carrying back notice mobile switching centre;
A3, mobile switching centre send the message of switching to the source base station controller, source base station controller notice travelling carriage, and travelling carriage switches to the channel that target base station controller distributes with signal.
2, channel switching method according to claim 1 is characterized in that, comprises steps A 4: mobile switching centre, source base station controller and media gateway discharge resource separately.
3, channel switching method according to claim 1 and 2 is characterized in that, described steps A 2 comprises step: if can not set up carrying, then notify mobile switching centre between media gateway and the target base station controller; Mobile switching centre sends the message that refusal switches to the source base station controller.
4, channel switching method according to claim 3, it is characterized in that, described steps A 2 comprises step: if set up carrying between time media gateway of surpass setting and the target base station controller, mobile switching centre sends the message that refusal switches to the source base station controller.
5, channel switching method according to claim 4, it is characterized in that, described steps A 2 comprises step: mobile switching centre uses modification far-end carrying attribute order notice media gateway, revises to comprise to carry to set up in the order of far-end carrying attribute and finishes the notice request cell.
6, a kind of channel switching method is characterized in that, the interexchange channel switching comprises step:
B1, source base station controller are to source mobile switching centre request switching channels;
B2, source mobile switching centre notify first media gateway and target mobile switching centre, target mobile switching centre notifies second media gateway and target base station controller, after setting up carrying between first media gateway and second media gateway and second media gateway and the target base station controller, by the first media gateway notification source mobile switching centre;
B3, source mobile switching centre send the message of switching to the source base station controller, source base station controller notice travelling carriage, and travelling carriage switches to the channel that target base station controller distributes with signal.
7, channel switching method according to claim 6 is characterized in that, comprises step B4: source mobile switching centre, source base station controller, first media gateway discharge resource separately.
8, according to claim 6 or 7 described channel switching methods, it is characterized in that, described step B2 comprises step: after setting up carrying between first media gateway, second media gateway and the target base station controller, by target base station controller notification target mobile switching centre, again by notification source mobile switching centre of target mobile switching centre.
9, channel switching method according to claim 8, it is characterized in that, described step B2 comprises step: if can not set up carrying between first media gateway, second media gateway and the target base station controller, and the first media gateway notification source mobile switching centre; Source mobile switching centre sends the message that refusal switches to the source base station controller.
10, channel switching method according to claim 9, it is characterized in that, described step B2 comprises step: if can not set up carrying between first media gateway, second media gateway and the target base station controller, target base station controller notification target mobile switching centre is again by notification source mobile switching centre of target mobile switching centre; Source mobile switching centre sends the message that refusal switches to the source base station controller.
11, channel switching method according to claim 10, it is characterized in that, described step B2 comprises step: do not set up carrying between time first media gateway, second media gateway and the target base station controller of setting if surpass, source mobile switching centre sends the message that refusal switches to the source base station controller.
12, channel switching method according to claim 11 is characterized in that: when the interoffice channel switched to the forward direction switching, source mobile switching centre was a Controlling MSC, and target mobile switching centre is a serving mobile switching center.
13, channel switching method according to claim 12 is characterized in that: when the interoffice channel switched to the back to switching, source mobile switching centre was a serving mobile switching center, and target mobile switching centre is a Controlling MSC.
14, channel switching method according to claim 13, it is characterized in that, described step B2 comprises step: source mobile switching centre uses the order of modification far-end carrying attribute to notify first media gateway, comprises carrying foundation in the order of modification far-end carrying attribute and finishes the notice request cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610061776XA CN100459811C (en) | 2006-07-21 | 2006-07-21 | Channel switching method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610061776XA CN100459811C (en) | 2006-07-21 | 2006-07-21 | Channel switching method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2009146664A1 (en) * | 2008-06-07 | 2009-12-10 | 华为技术有限公司 | Method, apparatus and system for call handover and process |
| WO2010088805A1 (en) * | 2009-02-03 | 2010-08-12 | 华为技术有限公司 | Bearer processing method, device and attachment method, device |
| CN101115029B (en) * | 2007-03-05 | 2011-10-26 | 中兴通讯股份有限公司 | Mixed connection method for base station and core network |
| CN101316385B (en) * | 2007-05-30 | 2011-12-21 | 华为技术有限公司 | Conversation description protocol negotiation method and correlated equipment |
| CN102395124A (en) * | 2008-06-07 | 2012-03-28 | 华为技术有限公司 | Call switching method, call establishment method, call switching device and call establishment device |
| CN102612069A (en) * | 2011-01-24 | 2012-07-25 | 中兴通讯股份有限公司 | Mobile communication system based on Internet protocol (IP) bearing and method for switching cells in system |
| CN101647309B (en) * | 2007-03-09 | 2013-03-13 | 株式会社Ntt都科摩 | Mobile communication method, radio base station, and upper level node |
| CN109963313A (en) * | 2017-12-26 | 2019-07-02 | 海能达通信股份有限公司 | Channel recovery method and device in a kind of system, after inter-system handoff |
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| US6353607B1 (en) * | 1998-11-20 | 2002-03-05 | Ericsson Inc. | IP base GSM inter-MSC handover |
| US6990088B2 (en) * | 2000-08-18 | 2006-01-24 | Telefonaktiebolaget L M Ericsson (Publ) | Handoff in radio telecommunications networks |
| CN1223219C (en) * | 2002-11-29 | 2005-10-12 | 华为技术有限公司 | Method for inter-office switching between mobile service switching centers |
| CN100440765C (en) * | 2003-07-10 | 2008-12-03 | 华为技术有限公司 | A method for implementing channel establishment by call between packet networks |
| CN100544514C (en) * | 2003-11-14 | 2009-09-23 | 中兴通讯股份有限公司 | The switching method of mobile flexible exchanging network and device |
| KR100639239B1 (en) * | 2004-11-10 | 2006-10-26 | 엘지노텔 주식회사 | Method for processing of handover in media gateway |
| DE602005016382D1 (en) * | 2004-12-02 | 2009-10-15 | Huawei Tech Co Ltd | FURTHER METHOD IN A MOBILE COMMUNICATION SYSTEM FOR SECURING COMMUNICATION CONTINUATION |
| CN1319409C (en) * | 2004-12-02 | 2007-05-30 | 华为技术有限公司 | Switching method for keeping continuous communication in mobile communication system |
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| CN101115029B (en) * | 2007-03-05 | 2011-10-26 | 中兴通讯股份有限公司 | Mixed connection method for base station and core network |
| CN101647309B (en) * | 2007-03-09 | 2013-03-13 | 株式会社Ntt都科摩 | Mobile communication method, radio base station, and upper level node |
| CN101316385B (en) * | 2007-05-30 | 2011-12-21 | 华为技术有限公司 | Conversation description protocol negotiation method and correlated equipment |
| WO2009146664A1 (en) * | 2008-06-07 | 2009-12-10 | 华为技术有限公司 | Method, apparatus and system for call handover and process |
| CN102395124A (en) * | 2008-06-07 | 2012-03-28 | 华为技术有限公司 | Call switching method, call establishment method, call switching device and call establishment device |
| RU2520573C2 (en) * | 2008-06-07 | 2014-06-27 | Хуавэй Текнолоджиз Ко., Лтд. | Method, apparatus and system for call handover and processing |
| RU2520573C9 (en) * | 2008-06-07 | 2014-09-10 | Хуавэй Текнолоджиз Ко., Лтд. | Method, apparatus and system for call handover and processing |
| WO2010088805A1 (en) * | 2009-02-03 | 2010-08-12 | 华为技术有限公司 | Bearer processing method, device and attachment method, device |
| CN102612069A (en) * | 2011-01-24 | 2012-07-25 | 中兴通讯股份有限公司 | Mobile communication system based on Internet protocol (IP) bearing and method for switching cells in system |
| CN102612069B (en) * | 2011-01-24 | 2016-02-10 | 中兴通讯股份有限公司 | Based on the method that in the mobile communication system of IP carrying and system small area switches |
| CN109963313A (en) * | 2017-12-26 | 2019-07-02 | 海能达通信股份有限公司 | Channel recovery method and device in a kind of system, after inter-system handoff |
| CN109963313B (en) * | 2017-12-26 | 2021-08-24 | 海能达通信股份有限公司 | Channel recovery method and device after intra-system and inter-system handover |
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