CN102083230B - Method and device for realizing local exchange - Google Patents
Method and device for realizing local exchange Download PDFInfo
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- CN102083230B CN102083230B CN200910225543.2A CN200910225543A CN102083230B CN 102083230 B CN102083230 B CN 102083230B CN 200910225543 A CN200910225543 A CN 200910225543A CN 102083230 B CN102083230 B CN 102083230B
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Abstract
The invention provides a method and device for realizing local exchange, wherein the method comprises: a base station controller (BSC) acquires the delay time between a first base station and the BSC and the delay time between a second base station and the BSC; when a conversation is converted from the traditional mode to a local exchange mode, the BSC acquires the link delay time from the first base station to the second base station and the link delay time from the second base station to the first base station; according to the delay time between the first base station and the BSC, the link delay time from the first base station to the second base station is subtracted so as to obtain the conversion delay time of the first base station; according to the delay time between the second base station and the BSC, the link delay time from the second base station to the first base station is subtracted so as to obtain the conversion delay time of the second base station; and the first base station and the second base station respectively receive the conversion delay time of the first base station and the conversion delay time of the second base station, then set the received switching delay time of the first base station and the conversion delay time of the second base station into new link parameters. By utilizing the method and device provided by the invention, the situation that in local exchange, the difference between the link delay time before link conversion and the link delay time after link conversion is larger.
Description
Technical field
The present invention relates to communication technical field, particularly relate to method and the device of the realization of a kind of local exchange.
Background technology
Many communication systems all apply local exchange function at present.Local exchange refers to, calling and called user is meeting under certain condition, and its call is no longer through core net, and the mode of directly carrying out between calling and called two base stations.The benefit done like this decreases taking resources of core network, shortens the propagation delay time of voice.The utilized bandwidths such as Abis mouth (interface between base station controller and base station) are saved, for operator and user both provide conveniently.The maximum feature of local exchange is: user face data no longer directly carries out via core net transmission between base station.When adopting aforesaid way to transmit when conversing, can think to carry out under local exchange pattern, accordingly, traditional talking mode, just can be described as carrying out under traditional mode.
In local exchange realizes, such problem certainly will be related to, when user speech data (user face data) by transmit under traditional mode be transferred to suddenly local exchange mode transfer time, necessarily have larger time difference, when causing speech under from traditional mode to local exchange pattern, there is larger loss, and when proceeding to traditional mode from local exchange pattern, occur that larger voice are overlapping.
Illustrate as shown in Figure 1, under traditional mode, mobile phone MS1 (mobile Station) and mobile phone MS2 converses.The voice of mobile phone MS1 arrive mobile phone MS2 through TC to base station BTS 2 by base station BTS 1 and TC (codec) again via MSC (Mobile Switching Centre, mobile switching centre).As seen from Figure 1, after a speech frame sends from mobile phone MS1, at least will through the time of T1+T2.And when the call of mobile phone MS1 and mobile phone MS2 is transferred under local exchange pattern, the voice of mobile phone MS1 are directly delivered on mobile phone MS2 via base station BTS 2 by base station BTS 1.Voice, from mobile phone MS1, arrive the mobile phone MS2 time used to MSC and are far longer than base station BTS 1 (BTS, Base Station) and directly arrive time between base station BTS 2 after a circle.When in call, when user face data forwards another kind of pattern to from a kind of pattern suddenly, larger delay inequality can be caused because of transmission link length issue.
In the design of current local exchange, a kind of mode is had to be the method simultaneously keeping two links after adopting base station before switching.When the voice that mobile phone sends enter under local exchange pattern from traditional mode, a first newly-built new link to the other side BTS, after building up, discharge original talking link again, complete the conversion (implementation of this local exchange proposes in related invention) to local exchange pattern.During conversion, there is the moment that one very short, BTS1 and BSC (Base Station Control original under traditional mode, base station controller) between link under link and local exchange pattern between newly-built base station BTS 1 and BTS2 depositing, and user face data sends to two links simultaneously, although these two links are also deposited, one in use.Because conversion not yet complete, at this moment user MS2 hear be from this link of BTS1 and BSC transmit voice.But when a switchover occurs, between BTS1 and BSC, link will cut off, and the link between BTS1 and BTS2 will be enabled, therefore, the voice heard in advance below lost the speech data still in transmission by short link, therefore cause large section loss of voice.Otherwise, when entering under traditional mode from local exchange pattern, because the former voice transfer link is significantly shorter than the latter, again because same reason, can causes and repeat to hear large section voice at traditional mode.
In actual applications, may change through being everlasting between local exchange pattern and traditional mode according to business demand, the perception that user is bad will certainly be brought.
At present, in the realization of local exchange, because change-over time is shorter, or do not consider this kind of problem, or a fixing Δ t is set carries out time delay.Obviously good not.
The generation of this situation, by the feature of local exchange is determined, so will seek new solution, eliminates the deficiencies in the prior art.
Summary of the invention
Technical problem to be solved by this invention is to provide method and the device of the realization of a kind of local exchange, make up the loss of voice or voice overlap problem that cause due to delay inequality when changing between local exchange pattern and traditional mode, realization for local exchange proposes a kind of effective solution, strengthens Consumer's Experience.
In order to solve the problems of the technologies described above, the invention provides a kind of method that local exchange realizes, comprising:
First terminal and the second terminal are when setting up call, base station controller (BSC) sets up and the first base station, talking link between the second base station, BSC to obtain the first base station, delay time between the second base station and BSC settling time respectively according to talking link;
When call is transformed into local exchange pattern from traditional mode, BSC sends new link establishment message to the first base station and the second base station, obtains the first base station to link delay time of the second base station and the second base station to the link delay time of the first base station;
BSC, according to the delay time between the first base station and BSC, deducts the link delay time of the first base station to the second base station, obtained for the first base station transfer delay time; According to the delay time between the second base station and BSC, deduct the link delay time of the second base station to the first base station, obtained for the second base station transfer delay time;
BSC issues the old channel massage of release respectively to the first base station and the second base station, wherein carry the first base station transfer delay time value and the second base station transfer delay time value that calculate respectively;
First base station and the second base station receive the first base station transfer delay time and the second base station transfer delay time respectively, and be arranged in new link parameter, original that set up and between BSC the link of release simultaneously, to ensure that the voice packet of the first base station and the second base station sends after time delay first base station transfer delay time and the second base station transfer delay time respectively in new link.
Furthermore, described BSC to obtain the first base station, delay time between the second base station and BSC settling time respectively according to talking link, comprising:
BSC record to the first base station, the second base station transmitting channel activate the transmitting time of message and receive the first base station, the time of reception of Channel Activation acknowledge message that the second base station sends;
According to described to the first base station, the second base station transmitting channel activate the transmitting time of message and receive the first base station, the time of reception of Channel Activation acknowledge message that the second base station sends, obtain the delay time between the first base station and BSC and the delay time between the second base station and BSC.
Furthermore, described BSC obtains the first base station to link delay time of the second base station and the second base station to the link delay time of the first base station, comprising:
BSC completes message according to sending to the first base station link to set up message to the new link establishment receiving the second base station feedback, obtains the link delay time of the first base station to the second base station; Send to the second base station link to set up message according to BSC to complete message to the new link establishment receiving the first base station feedback, obtain the link delay time of the second base station to the first base station.
Furthermore, described BSC completes message according to sending to the first base station link to set up message to the new link establishment receiving the second base station feedback, obtains the link delay time of the first base station to the second base station, comprising:
BSC sends new link establishment message and records delivery time to during the first base station;
First base station receives new link establishment message, starts the request for building link message initiating link layer to the second base station; After second base station receives the request for building link message that the first base station sends over, feed back new link establishment and complete message and receive rear record time of reception to BSC, BSC;
BSC subtracts each other sending new link establishment message to the delivery time of the first base station and the time of reception that the new link establishment receiving the second base station feedback completes message, obtains the link delay time of the first base station to the second base station.
Furthermore, describedly send to the second base station link to set up message according to BSC to complete message to the new link establishment receiving the first base station feedback, obtain the link delay time of the second base station to the first base station, comprising:
BSC sends new link establishment message and records delivery time to during the second base station;
Second base station receives new link establishment message, starts the request for building link message initiating link layer to the first base station; After first base station receives the request for building link message that the second base station sends over, feed back new link establishment and complete message and receive rear record time of reception to BSC, BSC;
BSC subtracts each other sending new link establishment message to the delivery time of the second base station and the time of reception that the new link establishment receiving the first base station feedback completes message, obtains the link delay time of the second base station to the first base station.
Furthermore, described BSC sends in the new link establishment message of the first base station and the second base station, comprises the parameter that the other side base station is relevant to link establishment, comprises IP and port numbers.
Furthermore, in the old channel massage of release that described BSC issues respectively to the first base station and the second base station, also comprise: the link information between the BSC that discharge and the first base station, the second base station.
In order to solve the problems of the technologies described above, the invention provides the device that a kind of local exchange realizes, comprising: the first delay time being arranged at base station controller (BSC) obtains module, the second delay time obtains module, the acquisition of base station transfer delay time module, message transmission module; Be arranged at the processing module of the first base station and the second base station;
Described first delay time obtains module, for first terminal and the second terminal when setting up call, set up and the first base station, talking link between the second base station, BSC to obtain the first base station, delay time between the second base station and BSC settling time respectively according to talking link;
Described second delay time obtains module, for being transformed into local exchange pattern when call from traditional mode, send to the new link establishment message in the first base station and the second base station, obtain the first base station to link delay time of the second base station and the second base station to the link delay time of the first base station;
The described base station transfer delay time obtains module, for according to the delay time between the first base station and BSC, deducts the link delay time of the first base station to the second base station, obtains for the first base station transfer delay time; According to the delay time between the second base station and BSC, deduct the link delay time of the second base station to the first base station, obtained for the second base station transfer delay time;
Described message transmission module, for issuing the old channel massage of release respectively to the first base station and the second base station, wherein carries the first base station transfer delay time value and the second base station transfer delay time value that calculate respectively;
Described processing module, be arranged at the first base station and the second base station, receive the first base station transfer delay time and the second base station transfer delay time respectively, and be arranged in new link parameter, original that set up and between BSC the link of release simultaneously, to ensure that the voice packet of the first base station and the second base station sends after time delay first base station transfer delay time and the second base station transfer delay time respectively in new link.
Furthermore, described first delay time obtains module, for recording to the first base station, the second base station transmitting channel activate the transmitting time of message and receive the first base station, the time of reception of Channel Activation acknowledge message that the second base station sends;
According to described to the first base station, the second base station transmitting channel activate the transmitting time of message and receive the first base station, the time of reception of Channel Activation acknowledge message that the second base station sends, obtain the delay time between the first base station and BSC and the delay time between the second base station and BSC.
Furthermore, described second delay time obtains module, for completing message to the new link establishment receiving the second base station feedback according to sending to the first base station link to set up message, obtain the link delay time of the first base station to the second base station; Send to the second base station link to set up message according to BSC to complete message to the new link establishment receiving the first base station feedback, obtain the link delay time of the second base station to the first base station.
Furthermore, described second delay time obtains module, is further used for recording delivery time when BSC sends new link establishment message to during the first base station; And when the first base station receives new link establishment message, start the request for building link message initiating link layer to the second base station, after second base station receives the request for building link message that the first base station sends over, feed back new link establishment when completing message to BSC, record time of reception; BSC is sent new link establishment message to subtract each other to the delivery time of the first base station and the time of reception that the new link establishment receiving the second base station feedback completes message, obtain the link delay time of the first base station to the second base station.
Furthermore, described second delay time obtains module, is further used for recording delivery time when BSC sends new link establishment message to during the second base station; And when the second base station receives new link establishment message, start the request for building link message initiating link layer to the first base station, after first base station receives the request for building link message that the second base station sends over, feed back new link establishment when completing message to BSC, record time of reception; BSC is sent new link establishment message to subtract each other to the delivery time of the second base station and the time of reception that the new link establishment receiving the first base station feedback completes message, obtain the link delay time of the second base station to the first base station.
Furthermore, described second delay time obtains module, is further used for, in the new link establishment message sending to the first base station and the second base station, comprising the parameter that the other side base station is relevant to link establishment, comprising IP and port numbers.
Furthermore, described message transmission module, is further used for, in the old channel massage of release issued respectively to the first base station and the second base station, also comprising: the link information between the BSC that discharge and the first base station, the second base station.
The larger situation of front and back link delay inequality changed by the chain that the present invention improves more greatly local exchange existence.Can carry out dynamically and effective adjustment according to the networking of reality.Improve user perceptibility more greatly.The present invention makes up the defect because local exchange own characteristic brings preferably, and the realization for local exchange proposes a kind of effective solution, and to increasing customer satisfaction degree, the lifting of conversion performance has larger help.
Accompanying drawing explanation
Fig. 1 is Problems existing in local exchange flow process in prior art.
Fig. 2 is that the Δ t under local exchange of the present invention calculates and transmission flow.
Fig. 3 is the effect figure of the Δ t under local exchange of the present invention.
Embodiment
From local exchange pattern to the conversion of traditional mode, because the reason of link causes time delay, because larger, therefore to consider that the inter base station communication very short to propagation delay time carries out time delay and make up, ensure at RTP (Realtime Transfer Protocol like this, RTP) link conversion time, not because delay inequality is comparatively large, user perceptibility that is that cause is not abnormal.Usually can consider to be fixed compensation with a time delay empirical value or estimated value; really the effect of improvement can be reached; but; because the position of base station is different; base station also may be different to the time delay of base station controller; therefore, if adopt the mode that constant time lag is arranged, can not the different environment of flexible adaptation, can not automatically adjust.
The present invention process this situation based on core concept be: by carrying out the dynamic compensation of time delay to shorter transmission link, under reaching local exchange pattern and traditional mode, user face data has identical transfer delay, like this, when two kinds of patterns are changed, substantially accomplish seamless connection, avoid the large section speech occurred because of the application of local exchange and lose or overlap problem.
The present invention is exactly for this situation, for IPAbis interface, proposes a kind of new resolving ideas, supplements this deficiency.
Specifically, the present invention will consider the problem of the following aspects:
1, delay strategy is adopted
The link increased between base station and base station transmits time delay Δ t.
2, specific flow scheme design in base station controller
In order to ensure to calculate, flow process being designed, base station controller can be known and between base station, set up time delay situation.
3, the dynamic calculation of time delay in base station controller
1) compensation of delay time Δ t is established.The Time dynamic of Δ t calculates.Ensure to adjust according to actual time delay situation.
2) Δ t calculates at BSC, and BSC sets up reporting of situation according to voice link between BTS and BTS, estimates Δ t, is handed down to BTS by message, and BTS carries out arranging and implementing.
3) position, two base stations of carrying out local exchange may be different, and transfer delay between BSC is not identical yet, in the up-downgoing of base station RTP link, therefore needs to compensate Δ t different, therefore needs to arrange Δ t1, Δ t2 carries out up-downgoing compensation respectively.
4) Δ t is according to following formulae discovery:
Δ t1=T1 (time delay of Abis mouth)-t1 (between base station, BTS1 to BTS2 direction link delay)
Δ t2=T2 (time delay of Abis mouth)-t2 (between base station, BTS2 to BTS1 direction link delay)
4, the issuing and arranging of time delay
The time delay Δ t1 calculated and Δ t2 is handed down to base station by message by base station controller.Base station is arranged when sending.
Below in conjunction with accompanying drawing in IPAbis mode, the enforcement of technical scheme is described in further detail:
The method that local exchange of the present invention realizes, comprising:
First terminal and the second terminal are when setting up call, base station controller (BSC) sets up and the first base station, talking link between the second base station, BSC to obtain the first base station, delay time between the second base station and BSC settling time respectively according to talking link;
When call is transformed into local exchange pattern from traditional mode, BSC sends new link establishment message to the first base station and the second base station, obtains the first base station to link delay time of the second base station and the second base station to the link delay time of the first base station;
BSC, according to the delay time between the first base station and BSC, deducts the link delay time of the first base station to the second base station, obtained for the first base station transfer delay time; According to the delay time between the second base station and BSC, deduct the link delay time of the second base station to the first base station, obtained for the second base station transfer delay time;
BSC issues the old channel massage of release respectively to the first base station and the second base station, wherein carry the first base station transfer delay time and the second base station transfer delay time value that calculate respectively;
First base station and the second base station receive the first base station transfer delay time and the second base station transfer delay time respectively, and be arranged in new link parameter, original that set up and between BSC the link of release simultaneously, to ensure that the voice packet of the first base station and the second base station sends after time delay first base station transfer delay time and the second base station transfer delay time respectively in new link.
In a preferred embodiment of the invention, described BSC to obtain the first base station, delay time between the second base station and BSC settling time respectively according to talking link, comprising:
BSC record to the first base station, the second base station transmitting channel activate the transmitting time of message and receive the first base station, the time of reception of Channel Activation acknowledge message that the second base station sends;
According to described to the first base station, the second base station transmitting channel activate the transmitting time of message and receive the first base station, the time of reception of Channel Activation acknowledge message that the second base station sends, obtain the delay time between the first base station and BSC and the delay time between the second base station and BSC;
In a preferred embodiment of the invention, described BSC obtains the first base station to link delay time of the second base station and the second base station to the link delay time of the first base station, comprising:
BSC completes message according to sending to the first base station link to set up message to the new link establishment receiving the second base station feedback, obtains the link delay time of the first base station to the second base station; Send to the second base station link to set up message according to BSC to complete message to the new link establishment receiving the first base station feedback, obtain the link delay time of the second base station to the first base station.
In a preferred embodiment of the invention, described BSC completes message according to sending to the first base station link to set up message to the new link establishment receiving the second base station feedback, obtains the link delay time of the first base station to the second base station, comprising:
BSC sends new link establishment message and records delivery time to during the first base station;
First base station receives new link establishment message, starts the request for building link message initiating link layer to the second base station; After second base station receives the request for building link message that the first base station sends over, feed back new link establishment and complete message and receive rear record time of reception to BSC, BSC;
BSC subtracts each other sending new link establishment message to the delivery time of the first base station and the time of reception that the new link establishment receiving the second base station feedback completes message, obtains the link delay time of the first base station to the second base station.
In a preferred embodiment of the invention, describedly send to the second base station link to set up message according to BSC to complete message to the new link establishment receiving the first base station feedback, obtain the link delay time of the second base station to the first base station, comprising:
BSC sends new link establishment message and records delivery time to during the second base station;
Second base station receives new link establishment message, starts the request for building link message initiating link layer to the first base station; After first base station receives the request for building link message that the second base station sends over, feed back new link establishment and complete message and receive rear record time of reception to BSC, BSC;
BSC subtracts each other sending new link establishment message to the delivery time of the second base station and the time of reception that the new link establishment receiving the first base station feedback completes message, obtains the link delay time of the second base station to the first base station.
In a preferred embodiment of the invention, described BSC sends in the new link establishment message of the first base station and the second base station, comprises the parameter that the other side base station is relevant to link establishment, comprises IP and (Port) port numbers.
In a preferred embodiment of the invention, in the old channel massage of release that described BSC issues respectively to the first base station and the second base station, also comprise: the link information between the BSC that discharge and the first base station, the second base station.
Accompanying drawing 2 is that flow path switch of the present invention and Δ t calculate.
Embodiment one: the design of local exchange chain of command flow path switch
In the present invention, realize local exchange, just need to realize three steps: the foundation of RTP link between base station and base station; RTP link switching between base station to base station controller is on RTP link between base station and base station; The release of the RTP link between base station to base station controller.
Step 1: set up new link.BSC sends to BTS1 and BTS2 and sets up new chain circuit message.BSC comprises IP address and the port numbers of BTS2 to the new chain circuit message of foundation that BTS1 sends.Equally, BSC comprises IP address and the port numbers of BTS1 to the new chain circuit message of the foundation sent in BTS2.Like this, BTS1 and BTS2 could know mutually and set up the RTP link with the other side.
Step 2: new link establishment completes instruction.Note, BTS1 is when activating and send RTP request for building link to BTS2, do not feed back new link establishment to BSC and complete instruction, but by the time receive BTS2 when sending the RTP request for building link of BTS1, the new link establishment could replying BTS1 to BSC completes instruction.The processing procedure of BTS2 is the same.The object done like this is, link when namely ensure that local exchange between BTS1 and BTS2 must be built up, and also ensure that BSC can calculate the link delay between BTS1 and BTS2.
Step 3:BSC, after knowing that the link between BTS1 and BTS2 is built up, needs to carry out Δ t1 and Δ t2 and calculates, and starts to discharge the original link between BSC and BTS1, BSC and BTS2 used.Therefore, BSC sends release old link message to respectively BTS1 and BTS2, and content is IP address and the port numbers of BTS1 and BTS2.Also carry Δ t information in this message, in the release old link message of BSC to BTS1, comprise Δ t1 value; Δ t2 value is comprised in the release old link message of BSC to BTS2.Like this, TA value is informed mobile phone by similar base station, and Δ t compensation of delay is also informed base station by BSC.
Step 4:BTS1 and BTS2 will receive Δ t1 and Δ t2 value is arranged in new link parameter, and then original that set up and between BSC the link of release, after completing release work, completes message by release old link and inform BSC.
Embodiment two: calculate from traditional mode to the time delay Δ t1 of local exchange patten transformation and Δ t2
Step 1:MS1 (first terminal) and MS2 (the second terminal) is when setting up call, BSC is sending TCH (Traffic Channel to BTS1 (the first base station) and BTS2 (the second base station), Traffic Channel) Channel Activation message 101 and TCH Channel Activation message 102 time, record transmitting time T11 and T21 respectively, set up the talking link between BSC and BTS1, BTS2.
Step 2: when BSC receives Channel Activation acknowledge message 102 and 202 of BTS1 and BTS2 respectively, record time of reception T12 and T22.Therefore, Abis mouth time delay T1=(T12-T11)/2 of BTS1 and BSC can be calculated; Equally, Abis mouth time delay T2=(T22-T21)/2 of BTS2 and BSC; Talking link now between BSC and BTS1, BTS2 has been set up respectively.Call starts to carry out.
Step 3: when after call setup, two-way phone, is transformed into local exchange pattern from traditional mode, needs to set up the new link with the other side base station in advance, and as shown in Figure 3, BSC sends new link establishment message 210 to BTS2, and records delivery time T23.Also send new link establishment message 110 to BTS1 simultaneously, and record delivery time T13.The parameter relevant to link establishment of the other side base station is all carried in two message, such as, IP and Port (port numbers).
Step 4: after BTS1 receives new link establishment message 110, starts the request for building link message initiating link layer to BTS2; Equally, after BTS2 receives new link establishment message 210, start the request for building link message initiating link layer to BTS1.BTS1 receives request for building link message (representing the message that link initiation request is set up, is link layer the inside story) (attention afterwards that the other side's base station BTS 2 sends over! After receiving link link setup message that the other side's base station BTS 2 sends), just send new link establishment and complete message 111 and receive the rear record T14 time of reception to BSC, BSC.Similar, BTS2 receives request for building link message (representing the message that link initiation request is set up, is link layer the inside story) (attention afterwards that the other side's base station BTS 1 sends over! After receiving link link setup message that the other side's base station BTS 1 sends), just send new link establishment and complete message 211 and receive the rear record T24 time of reception to BSC, BSC.
Now, can calculate, the link delay t1 from BTS1 to BTS2 is:
T1=T13-T24 (sending to the first base station BTS 1 to set up message to the message that establishes of base station receiving BTS2 feedback from BSC);
Link delay t2 from BTS2 to BTS1 is:
T2=T23-T14 (sending to the second base station BTS 2 to set up message to the message that establishes of base station receiving BTS1 feedback from BSC);
Step 5: calculate Δ t1 and Δ t2:
A) Δ t1=T1-t1 (when BSC judges two base stations not as same base station);
B) Δ t2=T2-t2 (when BSC judges two base stations not as same base station);
C) Δ t1=T1 (when BSC judges that two base stations are same base station, now t1=0);
D) Δ t2=T2 (when BSC judges that two base stations are same base station, now t2=0);
Because T1, T2, t1, t2 comprise the processing time of other non-link establishments such as encoding and decoding, thus the Δ t1 obtained after subtracting each other and Δ t2 to be all purer link delay poor.
Step 6:BSC issues the old channel massage 112 and 212 of release respectively to BTS1 and BTS2, wherein carries the value of Δ t1 and the Δ t2 calculated respectively, also carries the link information between BSC and BTS that will discharge simultaneously.
After step 7:BTS1 and BTS2 receives the value of Δ t1 and Δ t2 respectively, be set to link and send in optimum configurations, to ensure that the voice packet of BTS1 and BTS2 sends after time delay Δ t1 and Δ t2 respectively.
Embodiment three: from local exchange pattern to the conversion of traditional mode
Although conversion direction is contrary with embodiment two, except individual parameters is arranged, flow process is completely the same.Because conversion direction is transformed into link between BTS and BSC from the link between BTS1 and BTS2, so when sending new link establishment message, the link setup parameter of carrying is IP and Port (port numbers) information of BSC.That is new url is re-established with BSC.During release old link, release be link between BTS1 and BTS2.Now, chain-circuit time delay Δ t1 and Δ t2 does not need to recalculate, and calculates the value of gained when still continuing to use from traditional mode to local exchange patten transformation (namely embodiment two), carries in release old link message.
Figure 3 depicts the application drawing of the Δ t under local exchange.
As we can see from the figure, BTS1 and BTS2 sends the time delay having added Δ t1 and Δ t2 respectively at link after, when two kinds of patten transformation, because voice delay time is consistent, bumpless transfer can be accomplished.
This method is not only applicable to IPAbis link, is equally applicable to the Abis link of other protocol realization.
Present invention also offers the device that a kind of local exchange realizes, comprising: the first delay time being arranged at base station controller (BSC) obtains module, the second delay time obtains module, the acquisition of base station transfer delay time module, message transmission module; Be arranged at the processing module of the first base station and the second base station;
Described first delay time obtains module, for first terminal and the second terminal when setting up call, set up and the first base station, talking link between the second base station, BSC to obtain the first base station, delay time between the second base station and BSC settling time respectively according to talking link;
Described second delay time obtains module, for being transformed into local exchange pattern when call from traditional mode, send to the new link establishment message in the first base station and the second base station, obtain the first base station to link delay time of the second base station and the second base station to the link delay time of the first base station;
The described base station transfer delay time obtains module, for according to the delay time between the first base station and BSC, deducts the link delay time of the first base station to the second base station, obtains for the first base station transfer delay time; According to the delay time between the second base station and BSC, deduct the link delay time of the second base station to the first base station, obtained for the second base station transfer delay time;
Described message transmission module, for issuing the old channel massage of release respectively to the first base station and the second base station, wherein carries the first base station transfer delay time and the second base station transfer delay time value that calculate respectively;
Described processing module, be arranged at the first base station and the second base station, receive the first base station transfer delay time and the second base station transfer delay time respectively, and be arranged in new link parameter, original that set up and between BSC the link of release simultaneously, to ensure that the voice packet of the first base station and the second base station sends after time delay first base station transfer delay time and the second base station transfer delay time respectively in new link.
In a preferred embodiment of the invention, described first delay time obtains module, for recording to the first base station, the second base station transmitting channel activate the transmitting time of message and receive the first base station, the time of reception of Channel Activation acknowledge message that the second base station sends;
According to described to the first base station, the second base station transmitting channel activate the transmitting time of message and receive the first base station, the time of reception of Channel Activation acknowledge message that the second base station sends, obtain the delay time between the first base station and BSC and the delay time between the second base station and BSC.
In a preferred embodiment of the invention, described second delay time obtains module, for completing message to the new link establishment receiving the second base station feedback according to sending to the first base station link to set up message, obtain the link delay time of the first base station to the second base station; Send to the second base station link to set up message according to BSC to complete message to the new link establishment receiving the first base station feedback, obtain the link delay time of the second base station to the first base station.
In a preferred embodiment of the invention,
Described second delay time obtains module, is further used for recording delivery time when BSC sends new link establishment message to during the first base station; And when the first base station receives new link establishment message, start the request for building link message initiating link layer to the second base station, after second base station receives the request for building link message that the first base station sends over, feed back new link establishment when completing message to BSC, record time of reception; BSC is sent new link establishment message to subtract each other to the delivery time of the first base station and the time of reception that the new link establishment receiving the second base station feedback completes message, obtain the link delay time of the first base station to the second base station.
In a preferred embodiment of the invention,
Described second delay time obtains module, is further used for recording delivery time when BSC sends new link establishment message to during the second base station; And when the second base station receives new link establishment message, start the request for building link message initiating link layer to the first base station, after first base station receives the request for building link message that the second base station sends over, feed back new link establishment when completing message to BSC, record time of reception; BSC is sent new link establishment message to subtract each other to the delivery time of the second base station and the time of reception that the new link establishment receiving the first base station feedback completes message, obtain the link delay time of the second base station to the first base station.
In a preferred embodiment of the invention, described second delay time obtains module, is further used for, in the new link establishment message sending to the first base station and the second base station, comprising the parameter that the other side base station is relevant to link establishment, comprising IP and port numbers.
In a preferred embodiment of the invention, described message transmission module, is further used for, in the old channel massage of release issued respectively to the first base station and the second base station, also comprising: the link information between the BSC that discharge and the first base station, the second base station.
Obviously, those skilled in the art can carry out various change and modification to the inventive method and not depart from the spirit and scope of this method.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
The above, be only preferred embodiment of the present invention, is not used for limiting protection scope of the present invention.Those skilled in that art should be able to associate; use other mobile communication system; such as PHS (Personal Handy Phone System; hand-phone system), CDMA (Code Division Multiple Access) or some 3G mobile communication system etc., all should belong within protection scope of the present invention.
Above-mentioned embodiment describes the present invention with preferred embodiment, but the example of this visualization of just lifting for the ease of understanding, should not be considered to be limitation of the scope of the invention.Equally, according to the description of technical scheme of the present invention and preferred embodiment thereof, various possible equivalent change or replacement can be made, and all these change or replace the protection range that all should belong to the claims in the present invention.
Claims (10)
1. a method for local exchange realization, is characterized in that, comprising:
First terminal and the second terminal are when setting up call, base station controller BSC is set up and the first base station, talking link between second base station, BSC record is to the first base station, second base station transmitting channel activates the transmitting time of message and receives the first base station, the time of reception of the Channel Activation acknowledge message that the second base station sends, according to described to the first base station, second base station transmitting channel activates the transmitting time of message and receives the first base station, the time of reception of the Channel Activation acknowledge message that the second base station sends, obtain the delay time between the first base station and BSC and the delay time between the second base station and BSC,
When call is transformed into local exchange pattern from traditional mode, BSC sends new link establishment message to the first base station and the second base station, BSC completes message according to sending to the first base station link to set up message to the new link establishment receiving the second base station feedback, obtain the link delay time of the first base station to the second base station, send to the second base station link to set up message according to BSC to complete message to the new link establishment receiving the first base station feedback, obtain the link delay time of the second base station to the first base station;
BSC, according to the delay time between the first base station and BSC, deducts the link delay time of the first base station to the second base station, obtained for the first base station transfer delay time; According to the delay time between the second base station and BSC, deduct the link delay time of the second base station to the first base station, obtained for the second base station transfer delay time;
BSC issues the old channel massage of release respectively to the first base station and the second base station, wherein carry the first base station transfer delay time value and the second base station transfer delay time value that calculate respectively, and the BSC that will discharge and the first base station, link information between the second base station;
First base station and the second base station receive the first base station transfer delay time and the second base station transfer delay time respectively, and be arranged in new link parameter, original that set up and between BSC the link of release simultaneously, to ensure that the voice packet of the first base station and the second base station sends after time delay first base station transfer delay time and the second base station transfer delay time respectively in new link.
2. the method for claim 1, is characterized in that, described BSC completes message according to sending to the first base station link to set up message to the new link establishment receiving the second base station feedback, obtains the link delay time of the first base station to the second base station, comprising:
BSC sends new link establishment message and records delivery time to during the first base station;
First base station receives new link establishment message, starts the request for building link message initiating link layer to the second base station; After second base station receives the request for building link message that the first base station sends over, feed back new link establishment and complete message and receive rear record time of reception to BSC, BSC;
BSC subtracts each other sending new link establishment message to the delivery time of the first base station and the time of reception that the new link establishment receiving the second base station feedback completes message, obtains the link delay time of the first base station to the second base station.
3. the method for claim 1, is characterized in that, describedly sends to the second base station link to set up message according to BSC to complete message to the new link establishment receiving the first base station feedback, obtain the link delay time of the second base station to the first base station, comprising:
BSC sends new link establishment message and records delivery time to during the second base station;
Second base station receives new link establishment message, starts the request for building link message initiating link layer to the first base station; After first base station receives the request for building link message that the second base station sends over, feed back new link establishment and complete message and receive rear record time of reception to BSC, BSC;
BSC subtracts each other sending new link establishment message to the delivery time of the second base station and the time of reception that the new link establishment receiving the first base station feedback completes message, obtains the link delay time of the second base station to the first base station.
4. the method for claim 1, is characterized in that, described BSC sends in the new link establishment message of the first base station and the second base station, comprises the parameter that the other side base station is relevant to link establishment, comprises IP and port numbers.
5. the method for claim 1, is characterized in that, in the old channel massage of release that described BSC issues respectively to the first base station and the second base station, also comprises: the link information between the BSC that discharge and the first base station, the second base station.
6. a device for local exchange realization, is characterized in that, comprising: the first delay time being arranged at base station controller BSC obtains module, the second delay time obtains module, the acquisition of base station transfer delay time module, message transmission module; Be arranged at the processing module of the first base station and the second base station;
Described first delay time obtains module, for first terminal and the second terminal when setting up call, set up and the first base station, talking link between the second base station, record to the first base station, transmitting time that the second base station transmitting channel activates message and receive the first base station, the time of reception of Channel Activation acknowledge message that the second base station sends; According to described to the first base station, the second base station transmitting channel activate the transmitting time of message and receive the first base station, the time of reception of Channel Activation acknowledge message that the second base station sends, obtain the delay time between the first base station and BSC and the delay time between the second base station and BSC;
Described second delay time obtains module, for being transformed into local exchange pattern when call from traditional mode, send to the new link establishment message in the first base station and the second base station, set up message according to sending to the first base station link and complete message to the new link establishment receiving the second base station feedback, obtain the link delay time of the first base station to the second base station; Send to the second base station link to set up message according to BSC to complete message to the new link establishment receiving the first base station feedback, obtain the link delay time of the second base station to the first base station;
The described base station transfer delay time obtains module, for according to the delay time between the first base station and BSC, deducts the link delay time of the first base station to the second base station, obtains for the first base station transfer delay time; According to the delay time between the second base station and BSC, deduct the link delay time of the second base station to the first base station, obtained for the second base station transfer delay time;
Described message transmission module, for issuing the old channel massage of release respectively to the first base station and the second base station, wherein carry the first base station transfer delay time value and the second base station transfer delay time value that calculate respectively, and the BSC that will discharge and the first base station, link information between the second base station;
Described processing module, be arranged at the first base station and the second base station, receive the first base station transfer delay time and the second base station transfer delay time respectively, and be arranged in new link parameter, original that set up and between BSC the link of release simultaneously, to ensure that the voice packet of the first base station and the second base station sends after time delay first base station transfer delay time and the second base station transfer delay time respectively in new link.
7. device as claimed in claim 6, is characterized in that,
Described second delay time obtains module, is further used for recording delivery time when BSC sends new link establishment message to during the first base station; And when the first base station receives new link establishment message, start the request for building link message initiating link layer to the second base station, after second base station receives the request for building link message that the first base station sends over, feed back new link establishment when completing message to BSC, record time of reception; BSC is sent new link establishment message to subtract each other to the delivery time of the first base station and the time of reception that the new link establishment receiving the second base station feedback completes message, obtain the link delay time of the first base station to the second base station.
8. device as claimed in claim 6, is characterized in that,
Described second delay time obtains module, is further used for recording delivery time when BSC sends new link establishment message to during the second base station; And when the second base station receives new link establishment message, start the request for building link message initiating link layer to the first base station, after first base station receives the request for building link message that the second base station sends over, feed back new link establishment when completing message to BSC, record time of reception; BSC is sent new link establishment message to subtract each other to the delivery time of the second base station and the time of reception that the new link establishment receiving the first base station feedback completes message, obtain the link delay time of the second base station to the first base station.
9. device as claimed in claim 6, is characterized in that,
Described second delay time obtains module, is further used for, in the new link establishment message sending to the first base station and the second base station, comprising the parameter that the other side base station is relevant to link establishment, comprising IP and port numbers.
10. device as claimed in claim 6, is characterized in that,
Described message transmission module, is further used for, in the old channel massage of release issued respectively to the first base station and the second base station, also comprising: the link information between the BSC that discharge and the first base station, the second base station.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910225543.2A CN102083230B (en) | 2009-11-30 | 2009-11-30 | Method and device for realizing local exchange |
| PCT/CN2010/076109 WO2011063663A1 (en) | 2009-11-30 | 2010-08-18 | Method and device for realizing local switch |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910225543.2A CN102083230B (en) | 2009-11-30 | 2009-11-30 | Method and device for realizing local exchange |
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| CN102083230B true CN102083230B (en) | 2015-01-28 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1230311A (en) * | 1996-07-18 | 1999-09-29 | 艾利森公司 | System and method for equalizing delay time for transmission paths in distributed antenna network |
| CN101159905A (en) * | 2007-11-07 | 2008-04-09 | 华为技术有限公司 | Local exchange method, core network equipment and network system of implementing in base station controller |
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| KR20070053654A (en) * | 2004-03-05 | 2007-05-25 | 넥스트넷 와이어리스 인크. | Method and apparatus for isochronous datagram delivery over contention-based data link |
| JP4726060B2 (en) * | 2005-10-20 | 2011-07-20 | 株式会社エヌ・ティ・ティ・ドコモ | Base station apparatus and wireless communication parameter updating method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1230311A (en) * | 1996-07-18 | 1999-09-29 | 艾利森公司 | System and method for equalizing delay time for transmission paths in distributed antenna network |
| CN101159905A (en) * | 2007-11-07 | 2008-04-09 | 华为技术有限公司 | Local exchange method, core network equipment and network system of implementing in base station controller |
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| WO2011063663A1 (en) | 2011-06-03 |
| CN102083230A (en) | 2011-06-01 |
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