CN101702817B - Switching method and device in local voice exchange - Google Patents
Switching method and device in local voice exchange Download PDFInfo
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- CN101702817B CN101702817B CN200910109843A CN200910109843A CN101702817B CN 101702817 B CN101702817 B CN 101702817B CN 200910109843 A CN200910109843 A CN 200910109843A CN 200910109843 A CN200910109843 A CN 200910109843A CN 101702817 B CN101702817 B CN 101702817B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
- H04W36/305—Handover due to radio link failure
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Abstract
The invention relates to a switching method in local voice exchange, in particular to the process for switching a mobile phone from a first BTS (base transceiver station) to a third BTS for communication with a mobile phone under a second BTS. The process comprises the following steps: linking the third BTS and the second BTS through a BSC (base station controller) on the basis of the switching decision made by the BSC according to the information of measurement reports; transmitting a switching command to the mobile phone under the first BTS by the BSC, so that the mobile phone can be switched from the first BTS to the third BTS; and releasing the link between the second BTS and the first BTS. The invention further relates to a switching device in local voice exchange. Each BSC comprises a switching decision-making unit, a base station linking unit, a switching controlling unit and a releasing controlling unit. The voice data can be directly transmitted between two BTSs by achieving the direct connection of the switching transmission between two BTSs. Therefore, the invention saves the bandwidth of the links between the BSC and the BTS and between the BSC and the MSC (mobile switching center), reduces the voice coding frequency and the voice data delay, eliminates the influence of the time delay and jitter of the voice network on voice and improves the voice quality.
Description
Technical field
The present invention relates to moving communicating field, specifically, relate to GSM (Global System forMobile Communications, global system for mobile communications).
Background technology
In GSM, the exchange of speech in the communication process is carried out at MSC (Mobile Switching Center, mobile switching centre) or BSC (Base Station Controller, base station controller).At BTS (Base Transceiver Station; The base station) and the IP (InternetProtocol that uses between the BSC; Procotol) and satellite environment as transmission link, more and more assorted, this has brought a lot of bigger influences for transmission of speech data; Like time delay, shake, packet loss etc., even possibly cause problems such as single-pass, call drop.
Usually, the local exchange of voice is meant, when the calling and called both sides that call out all at same BTS or (as shown in Figure 1) calling and called during at the different B TS that IP network connects; Set up local user's face data and between two BTS, carry out the service channel of voice transfer; Also be the passage of exchange of speech, after passage is set up, do not have user face data up-downgoing transmission between BTS and the BSC; The speech data of up-downgoing transmits between two BTS, and is transparent fully to the GSM core net.
If two mobile phones are in local exchange process; Because switching has taken place; Possibly relate to the situation that local switch mode changes has: one is that mobile phone and the mobile phone under the 2nd BTS under the BTS conversed under local switch mode; Owing to switch, need the mobile phone under the BTS be switched under the 3rd BTS, transfer this locality exchange of the 2nd BTS and the 3rd BTS to; The local switch mode of two right and wrong transfers local switch mode to; The 3rd, local switch mode transfers non-local switch mode to.
For example the changing method in the local exchange of present voice is done an explanation below.For example; The one BTS, the 2nd BTS and the 3rd BTS are by same BSC control and management; Two mobile phones are in communication process; The mobile phone that was in before this under the BTS is conversed with the mobile phone that is in the 2nd BTS under, then, be in mobile phone under the BTS switch to the 3rd BTS time with the 2nd BTS under mobile phone converse.As shown in Figure 2, this handoff procedure comprises:
The flow process of chain of command 100:
S1:BSC makes handover decisions and issues the channel activation command for the 3rd BTS according to handover decisions according to measurement report, and the distribution service dedicated channel;
S2: the 3rd BTS activates channel and replys activation confirmation to BSC, and expression is ready to a wireless channel;
S3: the mobile phone that was in a BTS originally is linked into the service-specific channel that BSC distributes, and is cut under the 3rd BTS;
S4:BSC discharges the channel between the 2nd BTS and the BTS, and the Control work before the voice call is ready to complete;
Based on the flow process of above-mentioned chain of command 100, the flow process of speech business face 200 is following:
Be in mobile phone and the voice flow between the mobile phone under the 2nd BTS under the BTS before the switching and switch after the mobile phone and the voice flow between the mobile phone under the 3rd BTS that are under the 2nd BTS identical.Describe with the 2nd BTS after switching and the local switch mode of the 3rd BTS at present.
The uplink process comprises:
S10: voice data transmission to the three BTS of the mobile phone under the 3rd BTS;
S11: the 3rd BTS arrives BSC with voice data transmission,
S12:BSC arrives MSC with voice data transmission again;
Downlink transmission process comprises:
S13:MSC sends to BSC with this speech data after receiving the speech data that BSC transmits,
S14:BSC sends to the 2nd BTS with speech data,
S15: the 2nd BTS sends to the mobile phone that is under it with speech data again.
In this process, no matter before and after switching, speech data sends out from mobile phone; To BTS, BTS is being transferred to BSC through IP network through transmission of radio links, and BSC is transferred to MSC through E1 or IP network; Carry out a reverse process afterwards, arrive another mobile phone.The link that twice has been passed through between BSC and BTS, BSC and the MSC during this, therefore, speech data will be handled through encoding and decoding repeatedly, and the delay variation of the IP link of IPAbis mouth, Ater mouth influences voice quality in the switching.
Summary of the invention
Technical problem to be solved by this invention provides a kind of changing method and device of saving in the local exchange of the good voice of bandwidth and voice quality.
The technical scheme that the present invention is adopted for its technical problem of solution is: the changing method in the local exchange of a kind of voice; At a BTS, the 2nd BTS and the 3rd BTS by same BSC control and management; And be under the situation that mobile phone and the mobile phone under the 2nd BTS under the BTS converse, be in mobile phone under the BTS switch to the 3rd BTS down with the 2nd BTS under the process conversed of mobile phone comprise:
Based on the handover decisions that BSC is made according to the measurement report content, the 3rd BTS and the 2nd BTS are through the BSC link setup;
Behind the 3rd BTS and the 2nd BTS link setup, BSC issues switching command for the mobile phone that is under the BTS, and the mobile phone under the BTS is switched under the 3rd BTS;
Discharge the link between the 2nd BTS and the BTS.
Switching device shifter in the local exchange of a kind of voice is characterized in that: comprise BSC, a BTS, the 2nd BTS and the 3rd BTS; A said BTS, the 2nd BTS and the 3rd BTS are by same said BSC control and management; Said BSC comprises handover decisions unit, link setup unit, base station, switch control unit and release control unit; Under the situation that the mobile phone and the mobile phone under said the 2nd BTS that are under the said BTS are conversed, be in mobile phone under the said BTS to switch to said the 3rd BTS down with said the 2nd BTS under mobile phone when conversing,
Said handover decisions unit is used for making handover decisions according to measurement report;
Link setup unit, said base station is used for according to handover decisions said the 3rd BTS and said the 2nd BTS link setup;
Said switch control unit is used for issuing switching command to the mobile phone that is under the said BTS, and the mobile phone under the said BTS is switched under said the 3rd BTS;
Said release control unit is used to issue release command, so that the link between the 2nd BTS and the BTS discharges.
The invention has the beneficial effects as follows: compare with the switching mode in the local exchange of traditional voice, the present invention directly sets up the voice data transmission link through BSC earlier between two BTS, switch again; Make the speech data of local exchange no longer pass through BSC and MSC; But directly between two BTS, transmit, save BSC and BTS like this, the bandwidth of link between BSC and the MSC; Simultaneously; Reduced the time-delay of speech coding number of times and speech data, eliminated speech network time delay and the influence of shake, improved voice quality voice.Particularly, under the situation of using IP network or satellite environment to transmit between BTS and the BSC, more obvious to the improvement of voice quality.After the 3rd BTS and the success of the 2nd BTS link setup, the 2nd BTS can make voice smoothly from switching on the link after preceding link carries out the transition to switching through having realized the two functions of sending out of two receipts on two links.
Description of drawings
Fig. 1 is the voice flow sketch map in the local exchange of prior art voice;
Fig. 2 is the switching flow figure in the local exchange of prior art voice;
Fig. 3 is the switching voice flow sketch map in the local exchange of one embodiment of the present invention voice;
Fig. 4 is the switching basic flow sheet in the local exchange of one embodiment of the present invention voice;
Fig. 5 is the switching detail flowchart in the local exchange of one embodiment of the present invention voice;
Fig. 6 is the switching device shifter structural representation in the local exchange of one embodiment of the present invention voice.
Embodiment
Fig. 3 is the switching voice flow sketch map in the local exchange of this execution mode voice.The one BTS, the 2nd BTS and the 3rd BTS be by same BSC control and management, is in mobile phone and the mobile phone under the 2nd BTS under the BTS in communication process, be in mobile phone under the BTS switch to the 3rd BTS down with the 2nd BTS under mobile phone converse.As shown in Figure 4, be in mobile phone under the BTS switch to the 3rd BTS down with the 2nd BTS under the process conversed of mobile phone comprise following basic step:
S41: the 3rd BTS and the 2nd BTS link setup.Based on the handover decisions that BSC is made according to the measurement report content, the 3rd BTS and the 2nd BTS are through the BSC link setup.
S43: switch.Behind the 3rd BTS and the 2nd BTS link setup, BSC issues switching command for the mobile phone that is under the BTS, and the mobile phone under the BTS is switched under the 3rd BTS.
S44: discharge former link.Discharge the link between the 2nd BTS and the BTS.
As shown in Figure 5, be in mobile phone under the BTS switch to the 3rd BTS down with the 2nd BTS under the detailed process conversed of mobile phone comprise:
From chain of command 500, as follows:
S51:BSC receives the measurement report of a BTS, makes handover decisions according to this measurement report.
S52:BSC sends activation command based on handover decisions to the 3rd BTS, and this activation command comprises the 3rd local link setup RTP message and channel activates message, and wherein, the said the 3rd local link setup RTP message comprises IP and the port numbers that the local exchange of the 2nd BTS is used; Simultaneously, BSC sends the second local link setup RTP message to the 2nd BTS, and this second local link setup RTP message comprises the IP and the port numbers of this locality exchange of the 3rd BTS use.
S53: after the 3rd BTS receives activation command; The 3rd local link setup RTP message is sent to the 2nd BTS, and the 3rd BTS activates according to channel behind the channel of message activation self to BSC and reports the IP that comprises this locality exchange that the 3rd BTS uses and the activation confirmation message of port numbers.After the 2nd BTS receives the second local link setup RTP message, the second local link setup RTP message is sent to the 3rd BTS.Afterwards, the 3rd BTS and the 2nd BTS wait for replying of the other side respectively, to confirm that the RTP link successfully connects between the 3rd BTS and the 2nd BTS.
S54: behind the 3rd BTS and the 2nd BTS success link setup, the 3rd BTS and the 2nd BTS report link setup to accomplish message to BSC.Afterwards, the 2nd BTS waits for the release message that is used to discharge RTP link between the 2nd BTS and the BTS that BSC issues.At this moment; RTP link between RTP link between the 2nd BTS and the 3rd BTS and the 2nd BTS and the BTS receives the speech data of uplink and downlink simultaneously; While is release data up; But only on the RTP link between the 2nd BTS and the BTS, send in the downlink voice data, promptly realize two functions of sending out both hands.The 3rd BTS then receives from the descending language data of the 2nd BTS and to the 2nd BTS and sends upstream voice data.
S55:BSC issues switching command for the mobile phone that is under the BTS after receiving the RTP link setup completion message from the 3rd BTS and the 2nd BTS, and the mobile phone that will be under the BTS switches under the BTS3.
S56:BSC sends the release message that is used to discharge the RTP link between the 2nd BTS and the BTS to the 2nd BTS, and this release message comprises IP address and the port numbers of a BTS.
S57: the 2nd BTS discharges the RTP link between the 2nd BTS and the BTS according to release message; And report the release acknowledge message to give BSC.
S58: mobile phone successfully is linked into the 3rd BTS, in this locality is connected, sets up conversation with the 2nd BTS2.
Based on the switching of above-mentioned chain of command 500, speech data is only transmitting between the 3rd BTS and the 2nd BTS on the speech business face 600, and is specific as follows:
The mobile phone that is under the 3rd BTS comprises for the transmission course that is in the mobile phone transmitting audio data under the 2nd BTS:
S61: voice data transmission to the three BTS of the mobile phone under the 3rd BTS.
S62: the 3rd BTS is with voice data transmission to the two BTS.
S63: the 2nd BTS sends to the mobile phone that is under it with speech data again.
The mobile phone that is under the 2nd BTS comprises for the transmission course that is in the mobile phone transmitting audio data under the 3rd BTS:
S64: voice data transmission to the two BTS of the mobile phone under the 2nd BTS.
S65: the 2nd BTS is with voice data transmission to the three BTS.
S66: the 3rd BTS sends to the mobile phone that is under it with speech data again.
As shown in Figure 6, the switching device shifter in the local exchange of a kind of voice comprises BSC, a BTS, the 2nd BTS and the 3rd BTS.The one BTS, the 2nd BTS and the 3rd BTS are by same BSC control and management.BSC comprises handover decisions unit 1, link setup unit, base station 2, switch control unit 3 and discharges control unit 4; Under the situation that the mobile phone and the mobile phone under the 2nd BTS that are under the BTS are conversed; Be in mobile phone under the BTS to switch to the 3rd BTS down with the 2nd BTS under mobile phone when conversing, handover decisions unit 1 is used for making handover decisions according to the measurement report that a BTS sends over; Link setup unit, base station 2 is used for according to handover decisions the 3rd BTS and the 2nd BTS link setup; Specifically; Link setup unit, base station 2 is used for sending the activation command that comprises the 3rd local link setup RTP information and channel activation message to the 3rd BTS, and wherein the 3rd local link setup RTP message comprises IP and the port numbers that the local exchange of the 2nd BTS is used; Link setup unit, base station 2 also is used for comprising the IP of the local exchange use of the 3rd BTS and the second local link setup RTP message of port numbers to the 2nd BTS transmission; The 3rd BTS is used for the 3rd local link setup message is sent to the 2nd BTS, and activates the channel of message activation self according to channel; The 2nd BTS is used for the second local link setup message is sent to the 3rd BTS.Behind the 3rd BTS and the 2nd BTS affirmation and the other side's success link setup, send the link setup success message to BSC respectively; Switch control unit 3 is used for issuing switching command to the mobile phone that is under the BTS, and the mobile phone under the BTS is switched under the 3rd BTS; Discharge control unit 4 and be used to issue release command, so that the link between the 2nd BTS and the BTS discharges.
Compare with the switching mode in the local exchange of traditional voice, this execution mode has realized that directly between two BTS, switching transmission connects, and the speech data of local exchange no longer passes through BSC and MSC; But directly between two BTS, transmit, save BSC and BTS like this, the bandwidth of link between BSC and the MSC; Simultaneously; Reduced the time-delay of speech coding number of times and speech data, eliminated speech network time delay and the influence of shake, improved voice quality voice.Particularly, under the situation of using IP network or satellite environment to transmit between BTS and the BSC, more obvious to the improvement of voice quality.In the handoff procedure, the two pair function of receiving of use can make voice smoothly from switching on the RTP link after preceding RTP link carries out the transition to switching.
Specify that the present invention is not limited only to the transfer of data of RTP type, suitable equally to the data transfer mode of other type.
Above content is to combine concrete execution mode to the further explain that the present invention did, and can not assert that practical implementation of the present invention is confined to these explanations.For the those of ordinary skill of technical field under the present invention, under the prerequisite that does not break away from the present invention's design, can also make some simple deduction or replace, all should be regarded as belonging to protection scope of the present invention.
Claims (8)
1. the changing method during voice this locality exchanges; It is characterized in that: at a BTS, the 2nd BTS and the 3rd BTS by same BSC control and management; And be under the situation that mobile phone and the mobile phone under the 2nd BTS under the BTS converse, be in mobile phone under the BTS switch to the 3rd BTS down with the 2nd BTS under the process conversed of mobile phone comprise:
The handover decisions of being made according to the measurement report content based on BSC; The 3rd BTS and the 2nd BTS comprise through the BSC link setup: BSC sends activation command to the 3rd BTS, sends the second local link setup message to the 2nd BTS simultaneously; So that the 3rd BTS and the 2nd BTS link setup; Wherein, said activation command comprises the 3rd local link setup message and channel activates message, and the said the 3rd local link setup message comprises the IP and the port numbers of the local exchange of the 2nd BTS; The said second local link setup message comprises the IP and the port numbers of the local exchange of the 3rd BTS; The 3rd BTS sends to the 2nd BTS with the 3rd local link setup message, and the 2nd BTS sends to the 3rd BTS with the second local link setup message;
Behind the 3rd BTS and the 2nd BTS link setup, BSC issues switching command for the mobile phone that is under the BTS, and the mobile phone under the BTS is switched under the 3rd BTS;
Discharge the link between the 2nd BTS and the BTS.
2. the changing method in the local exchange of voice according to claim 1; It is characterized in that: when the 3rd BTS sends to the 2nd BTS with the 3rd local link setup message; Report activation confirmation message to BSC behind the channel of the 3rd BTS according to said channel activation message activation self, said activation confirmation message comprises the IP and the port numbers of this locality exchange of the 3rd BTS use.
3. the changing method in the local exchange of voice according to claim 1; It is characterized in that: after the 3rd BTS received that the second local link setup message and the 2nd BTS receive the 3rd local link setup message success link setup, the 3rd BTS and the 2nd BTS reported link setup to accomplish message to BSC.
4. the changing method in the local exchange of voice according to claim 2 is characterized in that: it is after BSC receives the link setup completion message from the 3rd BTS and the 2nd BTS, to carry out that said BSC issues switching command for the mobile phone that is under the BTS.
5. according to the changing method in the local exchange of each described voice in the claim 2 to 4; It is characterized in that: the link between said release the 2nd BTS and the BTS comprises: BSC sends the release message that is used to discharge the link between the 2nd BTS and the BTS to the 2nd BTS, and the 2nd BTS discharges the link between the 2nd BTS and the BTS according to release message.
6. the changing method in the local exchange of voice according to claim 5, it is characterized in that: said release message comprises IP address and the port numbers of a BTS.
7. according to the changing method in the local exchange of each described voice in the claim 1 to 4; It is characterized in that: after the 2nd BTS discharged the link between itself and the BTS, the mobile phone and the speech data of the mobile phone under the 2nd BTS that are under the 3rd BTS transmitted between the 3rd BTS and the 2nd BTS.
8. the switching device shifter during voice this locality exchanges is characterized in that: comprise BSC, a BTS, the 2nd BTS and the 3rd BTS; A said BTS, the 2nd BTS and the 3rd BTS are by same said BSC control and management; Said BSC comprises handover decisions unit, link setup unit, base station, switch control unit and release control unit; Under the situation that the mobile phone and the mobile phone under said the 2nd BTS that are under the said BTS are conversed, be in mobile phone under the said BTS to switch to said the 3rd BTS down with said the 2nd BTS under mobile phone when conversing,
Said handover decisions unit is used for making handover decisions according to measurement report;
Link setup unit, said base station is used for according to handover decisions said the 3rd BTS and said the 2nd BTS link setup; Comprise that link setup unit, base station sends activation command to said the 3rd BTS; Send the second local link setup message to said the 2nd BTS simultaneously, so that said the 3rd BTS and said the 2nd BTS link setup; Said activation command comprises the 3rd local link setup message and channel activates message, and wherein, the said the 3rd local link setup message comprises the IP and the port numbers of the local exchange of the 2nd BTS; The said second local link setup message comprises the IP and the port numbers of the local exchange of the 3rd BTS;
The 3rd BTS is used for the 3rd local link setup message is sent to the 2nd BTS, and activates the channel of message activation self according to channel; The 2nd BTS is used for the second local link setup message is sent to the 3rd BTS;
Said switch control unit is used for issuing switching command to the mobile phone that is under the said BTS, and the mobile phone under the said BTS is switched under said the 3rd BTS;
Said release control unit is used to issue release command, so that the link between the 2nd BTS and the BTS discharges.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910109843A CN101702817B (en) | 2009-11-24 | 2009-11-24 | Switching method and device in local voice exchange |
| PCT/CN2010/072745 WO2010148810A1 (en) | 2009-11-24 | 2010-05-13 | Method and system for handover in voice local switching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910109843A CN101702817B (en) | 2009-11-24 | 2009-11-24 | Switching method and device in local voice exchange |
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| Publication Number | Publication Date |
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| CN101702817A CN101702817A (en) | 2010-05-05 |
| CN101702817B true CN101702817B (en) | 2012-09-05 |
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| CN200910109843A Expired - Fee Related CN101702817B (en) | 2009-11-24 | 2009-11-24 | Switching method and device in local voice exchange |
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| Country | Link |
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| CN (1) | CN101702817B (en) |
| WO (1) | WO2010148810A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102045871B (en) * | 2009-10-23 | 2015-08-12 | 中兴通讯股份有限公司 | Local switching communication method and system |
| CN101702817B (en) * | 2009-11-24 | 2012-09-05 | 中兴通讯股份有限公司 | Switching method and device in local voice exchange |
| CN102281187A (en) * | 2010-06-11 | 2011-12-14 | 中兴通讯股份有限公司 | System and method for realizing local exchange transmission and base station |
| CN102571697B (en) * | 2010-12-17 | 2015-05-13 | 中兴通讯股份有限公司 | Method and device for transmitting real time protocol message |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1388712A (en) * | 2001-05-30 | 2003-01-01 | 华为技术有限公司 | Phonetic channel exchange method for calling adaptation in mobile communication system |
| CN1678115A (en) * | 2004-04-01 | 2005-10-05 | 大唐移动通信设备有限公司 | Relay switch-over method in TD-SCDMA mobile communication system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI20065663A0 (en) * | 2006-10-17 | 2006-10-17 | Nokia Corp | Network elements and method for making a switchover |
| CN101702817B (en) * | 2009-11-24 | 2012-09-05 | 中兴通讯股份有限公司 | Switching method and device in local voice exchange |
-
2009
- 2009-11-24 CN CN200910109843A patent/CN101702817B/en not_active Expired - Fee Related
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- 2010-05-13 WO PCT/CN2010/072745 patent/WO2010148810A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1388712A (en) * | 2001-05-30 | 2003-01-01 | 华为技术有限公司 | Phonetic channel exchange method for calling adaptation in mobile communication system |
| CN1678115A (en) * | 2004-04-01 | 2005-10-05 | 大唐移动通信设备有限公司 | Relay switch-over method in TD-SCDMA mobile communication system |
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| CN101702817A (en) | 2010-05-05 |
| WO2010148810A1 (en) | 2010-12-29 |
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