CN103313339A - Signal fast switch method and base station controller - Google Patents
Signal fast switch method and base station controller Download PDFInfo
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- CN103313339A CN103313339A CN2013102176085A CN201310217608A CN103313339A CN 103313339 A CN103313339 A CN 103313339A CN 2013102176085 A CN2013102176085 A CN 2013102176085A CN 201310217608 A CN201310217608 A CN 201310217608A CN 103313339 A CN103313339 A CN 103313339A
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Abstract
The invention discloses a signal fast switch method and a base station controller and relates to the field of GSM (global system for mobile communication). A BSC (base station controller) end is provided with a downstream measurement report receiving timer and a timeout counter; the signal fast switch method comprises the steps that whether the timer is overtime or not is judged in a downstream level window sampling period; if the timer is overtime, the timeout counter is triggered to record one timeout of the timer; whether the count value of the timeout counter in the current downstream level window sampling period reaches the maximum count number of times or not is judged; and if the count value reaches the maximum count number of times, the BSC calculates the signal strength of each adjacent region according to the adjacent region levels in the recently received downstream measurement report and sends a channel activation request to the adjacent region with the strongest signal and carries out emergency switch. The timer is adopted to effectively monitor the timeliness of the downstream measurement report received by the BSC, so that the emergency switch is realized, the accidental time delay of the downstream measurement report can also be reduced through the timeout counter, and the user experience is further improved.
Description
Technical field
The present invention relates to GSM mobile communication technology field, particularly a kind of signal fast switch over method and base station controller.
Background technology
In recent years, along with popularizing of smart mobile phone, the cellphone subscriber has been not content with simple call function demand, requires the GSM mobile communications network can provide better user's communication to experience.
The GSM network is by switching between different districts, make it possible to converse in the stronger residential quarter of signal, experiencing to keep the good conversation of user at present.
Existing GSM handover scheme is roughly as follows:
Existing each BSS(Base Station Subsystem, base station sub-system) manufacturer realizes according to agreement documents such as 3GPP.Traditional handoff algorithms, be based on that the SACCH multi-frame that receives triggers, be that the mobile phone end is with the measurement result of basic data, envelope will become measurement report (being the SACCH multi-frame), every 104 frames (about 480ms, i.e. down-run survey reporting period) periodically measurement report is reported network side, the BTS end also carries out in a similar fashion; BSC(Base Station Controller, base station controller) then carry out processing such as homogenizing, judgement according to the SACCH multi-frame, satisfy handoff parameter when judgement and just can switch.
That is to say to have only the handoff parameter of satisfying just can switch, trigger corresponding handoff algorithms, if when BSC fails in time to receive the SACCH multi-frame, can't trigger traditional handoff algorithms, BSC can not in time switch to the user the better residential quarter of performance.In this process, the BTS of mobile phone side MS and network side, also will do following operation respectively:
1, mobile phone side
The Radio Link overtime timer that MS issues according to BTS (Radio Link Timeout) value, MS detects SACCH multi-frame decoding failure, fails 1 time, and counter subtracts 1; MS detects the SACCH multi-frame and decodes successfully, success 1 time, and counter adds 2.
The span of Radio Link overtime timer (Radio Link Timeout) is that 4～64(unit is the SACCH frame, and step-length is 4), 1 lasting time of SACCH multi-frame is about 480 milliseconds.
For example, generally speaking, Radio Link overtime timer (Radio Link Timeout) value is 32, and namely the user will have at least the state that can't hear the opposite end user voice that was in 16 seconds; In this stage, the non-constant of downlink network quality.
And after Radio Link overtime timer (Radio Link Timeout) is overtime, mobile phone will discharge link (the mobile phone reconstruction that also can make a call, but the call re-establishment success rate is very low), finally cause the interruption of user's communication, cause call drop.
2, network side
The BTS of network side also by Radio Link overtime timer (Radio Link Timeout) value, adopts the algorithm identical with the MS side, overtime after, network will discharge this link.
During untimely the or disappearance of the basic data that receives as BSC, BSC can't trigger traditional handoff algorithms, along with cellphone subscriber's movement, and final call drop.
By a large amount of statistical analyses before adversary's pusher side call drop, find to meet above-mentioned phenomenon:
1. most of call drop is Radio Link overtime timer (Radio Link Timeout) overtime causing;
2. the overtime preceding a very long time of Radio Link overtime timer (Radio Link Timeout), mobile phone can't receive the system message that network issues;
3. the overtime preceding a very long time of Radio Link overtime timer (Radio Link Timeout), mobile phone continues to report down-run survey report (SACCH multi-frame).
Summary of the invention
In view of the above problems, the embodiment of the invention provides a kind of signal fast switch over method and base station controller, be used for proposing a kind of based on judging that BSC receives the urgent handoff solution of down-run survey report promptness, so that when network side begins to occur to receive intermittently the measurement report (SACCH multi-frame) that mobile phone sends out, BSC can in time initiate to switch, further improve the stability of conversation, strengthen the user and experience.
The embodiment of the invention has adopted following technical scheme:
One embodiment of the invention provides a kind of signal fast switch over method, at the base station controller BSC end down-run survey report is set and receives timer, be used for the time interval that monitoring BSC receives the down-run survey report, with, the time-out count device, be used for the expired times that the described down-run survey report of record receives timer, described method comprises:
In a descending level window sample cycle, judge whether described down-run survey report receives timer overtime; The timing value that described down-run survey report receives timer needs at least greater than a down-run survey reporting period and less than a descending level window sample cycle;
When described down-run survey report receives timer expiry, trigger described time-out count device and record described down-run survey report reception timer expiry once; Described time-out count device added up in the current descending level window sample cycle;
Judge whether described time-out count device reaches the maximum count number of times in current descending level window sample cycle inside counting value;
When described time-out count device when current descending level window sample cycle inside counting value reaches described maximum count number of times, BSC carries out homogenizing to the adjacent area level sampling in the whole down-run survey reports that comprise in the current descending level window sample cycle, according to level homogenization result and neighboring cell load information calculations neighboring area signal intensity, and initiate channel to the strongest adjacent area of described signal and activate application, after channel activates successfully, initiate urgent switching command to the mobile phone side, realize promptly switching.
Also be provided with the hang-up timer at the BSC end, be used for the suspension time of control handover operation; When the time-out count device when current descending level window sample cycle inside counting value reaches described maximum count number of times, described method also comprises:
Trigger described hang-up timer;
In described hang-up timer timing course, do not carry out and judge whether described down-run survey report receives timer overtime, described BSC carries out homogenizing to the adjacent area level sampling in the whole down-run survey reports that comprise in the current descending level window sample cycle, according to level homogenization result and neighboring cell load information calculations neighboring area signal intensity, and initiate channel to the strongest adjacent area of described signal and activate application, after channel activates successfully, initiate the step of urgent switching command to the mobile phone side;
If described hang-up timer expiry, then carry out and judge whether described down-run survey report receives timer overtime, described BSC carries out homogenizing to the adjacent area sampled level in the whole down-run survey reports that comprise in the current descending level window sample cycle, according to level homogenization result and neighboring cell load information calculations neighboring area signal intensity, and initiate channel to the strongest adjacent area of described signal and activate application, after channel activates successfully, initiate the step of urgent switching command to the mobile phone side.
Described method also comprises:
After the BSC termination was received the channel handover success, it was timeout mode that described hang-up timer is set.
The described descending level window sample cycle is less than or equal to the set point of Radio Link overtime timer RLT; The maximum count number of times of described time-out count device is less than the value of descending level window.
Described method also comprises:
When receiving down-run survey when report, the BSC described down-run survey report of resetting receives the timing value of timer, and described reception timer restarts regularly;
When the line level window slides instantly, the BSC count value of described overtime timer of resetting, described overtime timer restarts counting.
Described method also comprises:
The BSC end arranges or revises the timing value that described down-run survey report receives timer according to demand;
The BSC end arranges or revises the maximum count number of times of described time-out count device according to demand;
When satisfying first condition, start described down-run survey report and receive timer; With
When satisfying second condition, close described down-run survey report and receive timer;
Described first condition comprises:
The BSC termination is received when first the effective down-run survey after the channel assignment success is reported; Or
The BSC termination is received when first the effective down-run survey behind the channel handover success is reported;
Described second condition comprises:
When the release command of BSC transmitting channel.
Another embodiment of the present invention provides a kind of base station controller BSC, is provided with: the down-run survey report receives timer, and described report receives timer and is used for the time interval that monitoring BSC receives the down-run survey report; With, the time-out count device is used for the expired times that the described down-run survey report of record receives timer;
Described base station controller BSC comprises:
Overtime judge module was used in a descending level window sample cycle, judged whether described down-run survey report receives timer overtime; The timing value that described down-run survey report receives timer needs at least greater than a down-run survey reporting period and less than a descending level window sample cycle;
Counting module is used for when described down-run survey report receives timer expiry, triggers described time-out count device and records described down-run survey report reception timer expiry once; Described time-out count device added up in the current descending level window sample cycle;
The switching judging module is used for judging whether described time-out count device reaches the maximum count number of times in current descending level window sample cycle inside counting value;
Handover module, be used for when described time-out count device when current descending level window sample cycle inside counting value reaches described maximum count number of times, BSC carries out homogenizing to the adjacent area level sampling in the whole down-run survey reports that comprise in the current descending level window sample cycle, according to level homogenization result and neighboring cell load information calculations neighboring area signal intensity, and initiate channel to the strongest adjacent area of described signal and activate application, after channel activates successfully, initiate urgent switching command to the mobile phone side, realize promptly switching.
Described base station controller BSC also is provided with the hang-up timer, is used for the suspension time of control handover operation;
Described BSC also comprises:
Trigger to hang up module, be used for when the time-out count device when current descending level window sample cycle inside counting value reaches described maximum count number of times, trigger described hang-up timer;
Hang up module, be used at described hang-up timer timing course, hang up described overtime judge module; When described hang-up timer expiry, start described overtime judge module.
Described BSC also comprises:
Force to finish module, be used for after the BSC termination is received the channel handover success, it is timeout mode that described hang-up timer is set.
Described BSC also comprises:
The first replacement module is used for when receiving the down-run survey report, and the described down-run survey report of resetting receives the timing value of timer, and described reception timer restarts regularly;
The second replacement module, when being used for that the line level window slides instantly, the BSC count value of described overtime timer of resetting, described overtime timer restarts counting;
First modified module is used for arranging or revising according to demand the timing value that described down-run survey report receives timer;
Second modified module is for the maximum count number of times that arranges or revise described time-out count device according to demand;
Start module, be used for when satisfying first condition, start described report and receive timer;
Closing module is used for when satisfying second condition, closes described report and receives timer;
Described first condition comprises:
The BSC termination is received when first the effective down-run survey after the channel assignment success is reported; Or
The BSC termination is received when first the effective down-run survey behind the channel handover success is reported;
Described second condition comprises:
When the release command of BSC transmitting channel;
The described descending level window sample cycle is less than or equal to the timing value of Radio Link overtime timer RLT; The maximum count number of times of described time-out count device is less than the value of descending level window.
Urgent changing method and base station controller that the embodiment of the invention provides, the BSC end receives timer and time-out count device by increasing the down-run survey report, butt joint is accepted the promptness of capable measurement report (SACCH multi-frame) and is in time analyzed, and adjacent area level sampling in the whole down-run surveys report that comprises in the current descending level window sample cycle carried out homogenizing, calculate the strongest adjacent area according to level homogenization result and neighboring cell load situation, namely receive timer by the down-run survey report and can carry out effective monitoring to measurement report (SACCH multi-frame) promptness that BSC receives, realize urgent the switching, also can reduce the contingency time-delay of down-run survey report by the time-out count device, further promote the user and experience.That is to say, the embodiment of the invention does not need to consider the wireless quality situation of Serving cell, only need the simple wireless quality of considering the adjacent area, just can initiate as early as possible to switch, avoid in the prior art that long-time (for example Radio Link overtime timer (Radio Link Timeout) value is 32, to have 16 seconds) can not hear the state of opposite end user voice, and make a call after the overtime problem of the call drop that reconstruction failure causes of RLT.Can effectively reduce call drop, promote user's perceptibility; And help operator in test, and reduce cutting off rate, avoid occurring continuity phenomenon of poor quality, effectively promoted the downlink network quality.
Further, by at BSC end the hang-up timer being set, that does not stop in the time of can also effectively avoiding the BSC end unstable in network condition a period of time sends the situation of switching command to the mobile phone side, further reduces the ineffective occupation of the network bandwidth.
Description of drawings
A kind of urgent changing method flow chart that Fig. 1 provides for one embodiment of the invention;
Fig. 2 is SACCH multi-frame schematic diagram in the embodiment of the invention;
A kind of urgent changing method flow chart that Fig. 3 provides for another embodiment of the present invention;
Fig. 4 is the work schematic diagram that down-run survey receives timer in the embodiment of the invention;
A kind of urgent switched system structured flowchart that Fig. 5 provides for one embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, embodiment of the present invention is described further in detail below in conjunction with accompanying drawing.
Whether referring to shown in Figure 1, the embodiment of the invention provides a kind of urgent changing method, namely overtime to determine whether to carry out the signal fast switching method based on judging that BSC receives time interval of next down-run survey report.Be provided with the down-run survey report at the base station controller BSC end and receive timer and time-out count device.The down-run survey report receives timer and is used for the time interval that monitoring BSC receives the down-run survey report, and the time-out count device is used for the expired times that the described down-run survey report of record receives timer.
Wherein, the measurement of basic data mainly comprises following 2 kinds:
1.MS(Mobile Station, travelling carriage) the responsible signal strength signal intensity of measuring down-link performance and from peripheral cell, receiving;
2.BTS(Base Transceiver Station, base transceiver station) responsible uplink performance of monitoring each time slot.
Carry the measurement result of above-mentioned basic data in the SACCH multi-frame, particular content sees also shown in Figure 2.
Referring to shown in Figure 1, the urgent changing method that the embodiment of the invention provides specifically comprises the steps:
S101: in a descending level window sample cycle, judge whether the down-run survey report receives timer overtime.
The timing value that this down-run survey report receives timer needs at least greater than a down-run survey reporting period and less than a descending level window sample cycle.
The number of reporting based on down-run survey in the downlink electrical truncation scaling method on all index futures traditional senses of descending level window sample.That is to say, trigger urgent sensitivity of switching in order to improve, stipulate in the embodiment of the invention that each descending level window sample cycle is a processing cycle, be that the BSC end is in a descending level window sample cycle, whole (being predetermined quantity) down-run survey report that comprises is analyzed, and level sampling is carried out in whole adjacent areas, and the level sampling value is carried out homogenizing, according to level homogenization result and the strongest adjacent area of neighboring cell load information calculations, and initiate urgent the switching.Like this, BSC can every a descending level window sample period treatment once further improve and trigger urgent sensitivity of switching.
Concrete, the down-run survey report receives timer, be used for the time interval that monitoring BSC receives the down-run survey report, the timing value that report receives timer needed at least greater than a down-run survey reporting period, when descending measurement report receives timer expiry, illustrate that the base station controller BSC end has at least surpassed 480ms and do not received the down-run survey report, namely current network begins to occur receiving intermittently the measurement report of sending out on the mobile phone (SACCH frame).And, receive the timing value of timer less than a descending level sampling period.
Further, the descending level window sample cycle is less than or equal to the timing value (being set point) of Radio Link overtime timer RLT, like this, can avoid before the overtime reconstruction of RLT, in time switching, be in the state that to hear the opposite end user voice for a long time in order to avoid cause, and since for a long time can't communicate by letter the time since the call drop phenomenon that the call re-establishment failure causes further improve the user and experience.
S102: when descending measurement report receives timer expiry, trigger the time-out count device and record descending measurement report reception timer expiry once; The time-out count device added up in the current descending level window sample cycle.
By the time-out count device, can effectively reduce the contingency time-delay of down-run survey report, avoid unnecessary frequent channel to switch, further promote the user and experience.
S103: judge whether the time-out count device reaches the maximum count number of times in current descending level window sample cycle inside counting value.
Preferably, the maximum count number of times of time-out count device is less than the value (being SACCH frame value) of descending level window.
S104: when the time-out count device when current descending level window sample cycle inside counting value reaches the maximum count number of times, BSC carries out homogenizing to the adjacent area level sampling in the current descending level window sample cycle, according to level homogenization result and the strongest adjacent area of neighboring cell load information calculations, and initiate channel to the strongest adjacent area and activate application, after channel activates successfully, initiate urgent switching command to the mobile phone side, be used for carrying out the quick switching of signal.
Concrete, when the time-out count device when current descending level window sample cycle inside counting value reaches the maximum count number of times, BSC then carries out the level homogenizing to all the adjacent area samplings in the descending level window sample cycle, according to the level after the homogenizing and neighboring cell load situation (during identical BSC), initiate channel to the strongest adjacent area and activate (Channel Activation), channel issues switching to mobile phone after activating successfully (Channel Activation Ack).
That is to say, do not need to consider the wireless quality situation of Serving cell, only need the simple wireless quality of considering the adjacent area, just can initiate as early as possible to switch, avoid in the prior art that long-time (for example Radio Link overtime timer Radio Link Timeout value is 32, to have 16 seconds) can not hear the state of opposite end user voice, and make a call after the overtime problem of the call drop that reconstruction failure causes of RLT.
Concrete changing method is for triggering corresponding handoff algorithms, and main handoff algorithms has following a few class:
1. based on the switching of power budget
2. based on the switching of incoming level (rescue property level switches)
3. based on the switching of the quality of reception (rescue character amount is switched)
4. based on the switching of distance
5. based on the switching of telephone traffic
As seen, the BSC end receives timer and time-out count device by increasing the down-run survey report, butt joint is accepted the promptness of capable measurement report (SACCH multi-frame) and is in time analyzed, and adjacent area level sampling in the whole down-run surveys report that comprises in the current descending level window sample cycle carried out homogenizing, calculate the strongest adjacent area according to level homogenization result and neighboring cell load situation, namely can carry out effective monitoring by down-run survey report (SACCH multi-frame) promptness that BSC is received, realize urgent the switching, also can reduce the contingency time-delay of down-run survey report by the time-out count device, further promote the user and experience.That is to say, the embodiment of the invention does not need to consider the wireless quality situation of Serving cell, only need the simple wireless quality of considering the adjacent area, just can initiate as early as possible to switch, avoid in the prior art that long-time (for example Radio Link overtime timer Radio Link Timeout value is 32, to have 16 seconds) can not hear the state of opposite end user voice, and make a call after the overtime problem of the call drop that reconstruction failure causes of RLT.Can effectively reduce call drop, promote user's perceptibility; And help operator in test, and reduce cutting off rate, avoid occurring continuity phenomenon of poor quality, effectively promoted the downlink network quality.
Illustrate, if the value of RLT is 32 SACCH multi-frames (1 lasting time of SACCH multi-frame is about 480 milliseconds).For existing handoff technique, the user will have at least the state that can't hear the opposite end user voice that was in 16 seconds; In this stage, the non-constant of downlink network quality.
Wherein, SACCH multi-frame (being measurement report): comprise two kinds of out-hole run report and down-run survey reports, the basic data that local terminal is collected sends to a kind of signaling that use the opposite end.
If the value of descending level window is 8 SACCH multi-frames, 4 descending level window sample cycles are namely arranged in a RLT, if it is 2 SACCH multi-frames that report receives the timing value of timer, the maximum count number of times of time-out count device is 2, then, use embodiment of the invention method, if in 1s, do not receive the down-run survey report, the BSC end just can be initiated urgent switching command, carries out channel and switches.As seen, the embodiment of the invention can avoid effectively in the prior art that long-time (for example Radio Link overtime timer Radio Link Timeout value is 32, to have 16 seconds) can not hear the state of opposite end user voice, and make a call after the overtime problem of the call drop that reconstruction failure causes of RLT.
Preferably, the urgent changing method that provides of the embodiment of the invention also comprises:
When receiving the down-run survey report, the report of BSC replacement down-run survey receives the timing value of timer, so that this timer restarts regularly, restarts to monitor the time interval that BSC receives the down-run survey report.
When the line level window slides instantly, the count value of BSC replacement overtime timer, overtime timer restarts counting.
Further, the urgent changing method that provides of the embodiment of the invention also comprises:
The BSC end can also arrange or revise the timing value that the down-run survey report receives timer according to demand.And/or the BSC end arranges or revises the maximum count number of times of described time-out count device according to demand.
The demand is such as being the current network actual conditions, and perhaps practical application scene of user etc. is taken all factors into consideration.Such as, when the user the expressway with in the shopping mall report is received the timing value of timer should be different, the residential quarter switching frequency is than very fast on the expressway, and can be slow at residential quarter, shopping mall switching frequency, therefore, the relative shopping mall of timing value should be set on the expressway want littler, can't hear for a long time with further minimizing and the situation of opposite end sound improve user's experience.
Further, when satisfying first condition, the BSC end can start the down-run survey report and receive timer.And when satisfying second condition, the BSC end is closed the down-run survey report and is received timer.
Above-mentioned first condition comprises:
The BSC termination is received when first the effective down-run survey after the channel assignment success is reported; Or the BSC termination is received when first the effective down-run survey behind the channel handover success is reported.
Above-mentioned second condition comprises:
When the release command of BSC transmitting channel.
Referring to Fig. 3, the embodiment of the invention provides another kind of urgent changing method, be provided with at the base station controller BSC end: the down-run survey report receives timer, be used for the time interval that monitoring BSC receives the down-run survey report, the time-out count device is used for the expired times that the described report of record receives timer, and, hang up timer, be used for the suspension time of the urgent handover operation of control.
Referring to shown in Figure 3, the urgent changing method that the embodiment of the invention provides specifically comprises the steps:
S301: in a descending level window sample cycle, judge whether the down-run survey report receives timer overtime.
Wherein, the timing value of down-run survey report reception timer needs at least greater than a down-run survey reporting period and less than a descending level window sample cycle.
The number of reporting based on down-run survey in the downlink electrical truncation scaling method on all index futures traditional senses of descending level window sample.That is to say, trigger urgent sensitivity of switching in order to improve, stipulate in the embodiment of the invention that each descending level window sample cycle is a processing cycle, be that the BSC end is in a descending level window sample cycle, whole (being predetermined quantity) down-run survey report that comprises is analyzed, and level sampling is carried out in whole adjacent areas, and the level sampling value is carried out homogenizing, according to level homogenization result and the strongest adjacent area of neighboring cell load information calculations, and initiate urgent the switching.Like this, BSC can every a descending level window sample period treatment once further improve and trigger urgent sensitivity of switching.
Concrete, the down-run survey report receives timer, be used for the time interval that monitoring BSC receives the down-run survey report, the timing value that report receives timer needed at least greater than a down-run survey reporting period, when descending measurement report receives timer expiry, illustrate that the base station controller BSC end has at least surpassed 480ms and do not received the down-run survey report, namely current network begins to occur receiving intermittently the measurement report of sending out on the mobile phone (SACCH frame).And, receive the timing value of timer less than a descending level sampling period.
Further, the descending level window sample cycle is less than or equal to the timing value of Radio Link overtime timer RLT, like this, can avoid before the overtime reconstruction of RLT, in time switching, be in the state that to hear the opposite end user voice for a long time in order to avoid cause, and since for a long time can't communicate by letter the time since the call drop phenomenon that the call re-establishment failure causes further improve the user and experience.
S302: when descending measurement report receives timer expiry, trigger time-out count device record report and receive timer expiry once; The time-out count device added up in the current descending level window sample cycle.
By the time-out count device, can effectively reduce the contingency time-delay of down-run survey report, avoid unnecessary frequent channel to switch, further promote the user and experience.
S303: judge whether the time-out count device reaches the maximum count number of times in current descending level window sample cycle inside counting value.
Further, the maximum count number of times of time-out count device is less than the value of descending level window.
S304: when the time-out count device when current descending level window sample cycle inside counting value reaches described maximum count number of times, BSC initiates urgent switching command, and triggers and hang up timer.
BSC initiates urgent switching command and is specially:
BSC carries out homogenizing to the adjacent area level sampling in the current descending level window sample cycle, according to level homogenization result and the strongest adjacent area of neighboring cell load information calculations, and initiate channel to the strongest described adjacent area and activate application, after channel activates successfully, initiate urgent switching command to the mobile phone side, realize promptly switching.
S305: in hanging up the timer timing course, if the down-run survey report receives timer expiry, do not carry out BSC and initiate urgent switching command.When hanging up timer expiry, if the down-run survey report receives timer expiry, carry out BSC and initiate urgent switching command.
BSC initiates urgent switching command and is specially BSC the adjacent area level sampling in the current descending level window sample cycle is carried out homogenizing, according to level homogenization result and the strongest adjacent area of neighboring cell load information calculations, and initiate channel to the strongest described adjacent area and activate application, after channel activates successfully, initiate the step of urgent switching command to the mobile phone side.
Concrete, in hanging up the timer timing course, handoff functionality is hung up, i.e. invalid handoff functionality, at this moment, the down-run survey report receives the timer timing that does as usual, but no longer triggers switching next time, and namely handoff functionality lost efficacy.
S306: after the BSC termination was received the channel handover success, arranging and hanging up timer was timeout mode, continues execution in step S301.
In the practical application; continuous a period of time usually can occur all is in the bad state of network; that is to say; generally; the network phenomenon of normal generation is intermittent; that is to say; if the down-run survey report receives timer expiry; BSC has sent a urgent switching command to the mobile phone side, but owing to the network reason, the mobile phone side is not received probably; such as the application scenarios that advances elevator; at this moment, will cause the BSC end constantly to send the situation of urgent switching command to the mobile phone side, cause the waste of the network bandwidth.Based on this, timer is hung up in embodiment of the invention utilization, when descending measurement report receives timer expiry, BSC sends urgent switching command to the mobile phone side, trigger simultaneously and hang up timer, handoff functionality is hung up a period of time, in order to avoid the BSC end constantly sends urgent switching command to the mobile phone side, reduce taking of the network bandwidth, improve bandwidth availability ratio.
Further, if the mobile phone side receives that BSC is to the urgent switching command of its transmission, successfully carried out the channel switching, then to arrange and hang up timer be timeout mode for BSC end, namely force to hang up timer expiry, to allow initiating urgent switching command to the mobile phone side, simultaneously, when the effective down-run survey of first after BSC receives the channel handover success is reported, restart the down-run survey report and receive timer.At this moment, can continue to restart to carry out from step S301.
Preferably, the embodiment of the invention also comprises:
When receiving the down-run survey report, the report of BSC replacement down-run survey receives the timing value of timer, receives timer and restarts regularly.
When the line level window slides instantly, the count value of BSC replacement overtime timer, overtime timer restarts counting.Descending level window slides, and namely enters next descending level window and adopts the cycle.
As preferably, the embodiment of the invention can also comprise:
The BSC end arranges or revises the timing value that described down-run survey report receives timer according to demand; And/or the BSC end arranges or revises the maximum count number of times of described time-out count device according to demand.
Further, when satisfying first condition, the BSC end can start the down-run survey report and receive timer.And when satisfying second condition, the BSC end is closed the down-run survey report and is received timer.
Above-mentioned first condition comprises:
The BSC termination is received when first the effective down-run survey after the channel assignment success is reported; Or the BSC termination is received when first the effective down-run survey behind the channel handover success is reported.
Above-mentioned second condition comprises:
When the release command of BSC transmitting channel.
As seen, the BSC end receives timer and time-out count device by increasing the down-run survey report, butt joint is accepted the promptness of capable measurement report (SACCH multi-frame) and is in time analyzed, and adjacent area level sampling in the whole down-run surveys report that comprises in the current descending level window sample cycle carried out homogenizing, calculate the strongest adjacent area according to level homogenization result and neighboring cell load situation, namely can carry out effective monitoring by down-run survey report (SACCH multi-frame) promptness that BSC is received, realize urgent the switching, also can reduce the contingency time-delay of down-run survey report by the time-out count device, further promote the user and experience.That is to say, the embodiment of the invention does not need to consider the wireless quality situation of Serving cell, only need the simple wireless quality of considering the adjacent area, just can initiate as early as possible to switch, avoid in the prior art that long-time (for example Radio Link overtime timer (Radio Link Timeout) value is 32, to have 16 seconds) can not hear the state of opposite end user voice, and make a call after the overtime problem of the call drop that reconstruction failure causes of RLT.Can effectively reduce call drop, promote user's perceptibility; And help operator in test, and reduce cutting off rate, avoid occurring continuity phenomenon of poor quality, effectively promoted the downlink network quality.
Further, by at BSC end the hang-up timer being set, that does not stop in the time of can also effectively avoiding the BSC end unstable in network condition a period of time sends the situation of switching command to the mobile phone side, further reduces the ineffective occupation of the network bandwidth.
Referring to Fig. 4, the work that receives timer for down-run survey in the embodiment of the invention illustrates that wherein MR is that down-run survey receives report, and T1 is that down-run survey receives timer.Concrete:
About T1:
● effect: monitoring BSC receives the time interval of adjacent twice down-run survey report (SACCH multi-frame).
● start: when BSC receives first effective down-run survey report (SACCH multi-frame) behind channel assignment success (Assignment Complete) or the handover success (Handover Complete).
● reset: BSC receives second effective down-run survey report (SACCH multi-frame).
● overtime: behind the timer expiry, BSC does not receive down-run survey report (SACCH multi-frame).
● stop: the BSC transmitting channel discharges (RF Channel Release)
(1) value: less than RLT(Radio Link Timeout) value; Less than descending level window value
(2) scope＜4-64SACCH multiframe period, step-length is 4 〉
(3) default value＜8 〉
About time-out count device T1Timeout Counter:
● effect: monitor and occur the overtime number of times of T1 in the descending level window period.
● start: it is overtime T1 to occur, is designated as 1 time, is once adding up in the descending level window sample cycle.
● reset: when descending level window slides, then reset.
(1) value: less than descending level window value
(2) scope＜0-32SACCH multiframe period 〉
(3) default value＜2 〉
About hanging up timer Handover Period T1:
● effect: T1 switches latency period.In this time cycle, the T1 switch sampling carries out as usual, but the T1 that no longer triggers next time switches i.e. T1 switch sampling inefficacy.
● start: after the T1 handover trigger.
● stop:
(1) value: general and descending level window value is identical
(2) scope＜0-63SACCH multiframe period 〉
(3) default value＜6 〉
Need to prove that the meaning of default value is the value of setting of this timer or counter acquiescence, if during the value of unmodified this parameter of user, system gives this parameter with value of default setting, the value of this parameter just is default value at this moment, also can be default value.
Referring to Fig. 5, the embodiment of the invention provides a kind of base station controller BSC 40, namely whether overtime to determine whether to carry out the base station controller that signal switches fast based on judging that BSC receives time interval of next down-run survey report, BSC is provided with: the down-run survey report receives timer, is used for the time interval that monitoring BSC receives the down-run survey report; With, the time-out count device is used for the expired times that the described down-run survey report of record receives timer.
Base station controller BSC 40 comprises:
Overtime judge module 41 was used in a descending level window sample cycle, judged whether the down-run survey report receives timer overtime; The timing value that the down-run survey report receives timer needs at least greater than a down-run survey reporting period and less than a descending level window sample cycle.
Counting module 42 is used for when descending measurement report receives timer expiry, triggers the time-out count device and records descending measurement report reception timer expiry once; The time-out count device added up in the current descending level window sample cycle.
Switching judging module 43 is used for judging whether the time-out count device reaches the maximum count number of times in current descending level window sample cycle inside counting value.
Handover module 44, be used for when the time-out count device when current descending level window sample cycle inside counting value reaches the maximum count number of times, BSC carries out homogenizing to the adjacent area level sampling in the current descending level window sample cycle, according to level homogenization result and the strongest adjacent area of neighboring cell load information calculations, and initiate channel to the strongest described adjacent area and activate application, after channel activates successfully, initiate urgent switching command to the mobile phone side, be used for carrying out the quick switching of signal.
As preferably, the descending level window sample cycle is less than or equal to the timing value of Radio Link overtime timer RLT.The maximum count number of times of time-out count device is less than the value of descending level window.
Preferably, base station controller BSC also is provided with the hang-up timer, is used for the suspension time of the urgent handover operation of control.
Accordingly, BSC also comprises:
Trigger to hang up module 45, be used for when the time-out count device when current descending level window sample cycle inside counting value reaches the maximum count number of times, trigger the hang-up timer.
Hang up module 46, be used for hanging up above-mentioned overtime judge module 41 hanging up the timer timing course; When hanging up timer expiry, start overtime judge module 41.
Preferably, BSC also further comprises:
Force to finish module 47, be used for after the BSC termination is received the channel handover success, arranging and hanging up timer is timeout mode.
Further, BSC can also comprise as lower module:
The first replacement module is used for when receiving the down-run survey report, and the report of resetting receives the timing value of timer, receives timer and restarts regularly.
The second replacement module, when being used for line level window slip instantly, the count value of BSC replacement overtime timer, overtime timer restarts counting.
First modified module is used for arranging according to demand or revising the timing value that report receives timer.
Second modified module is for the maximum count number of times that arranges or revise the time-out count device according to demand.
Start module, be used for when satisfying first condition, start report and receive timer.
With, closing module is used for when satisfying second condition, closes report and receives timer.
Above-mentioned first condition comprises:
The BSC termination is received when first the effective down-run survey after the channel assignment success is reported; Or the BSC termination is received when first the effective down-run survey behind the channel handover success is reported.
Above-mentioned second condition comprises:
When the release command of BSC transmitting channel.
As seen, the BSC end receives timer and time-out count device by increasing the down-run survey report, butt joint is accepted the promptness of capable measurement report (SACCH multi-frame) and is in time analyzed, and adjacent area level sampling in the whole down-run surveys report that comprises in the current descending level window sample cycle carried out homogenizing, calculate the strongest adjacent area according to level homogenization result and neighboring cell load situation, namely can carry out effective monitoring by measurement report (SACCH multi-frame) promptness that BSC is received, realize urgent the switching, also can reduce the contingency time-delay of down-run survey report by the time-out count device, further promote the user and experience.That is to say, the embodiment of the invention does not need to consider the wireless quality situation of Serving cell, only need the simple wireless quality of considering the adjacent area, just can initiate as early as possible to switch, avoid in the prior art that long-time (for example Radio Link overtime timer (Radio Link Timeout) value is 32, to have 16 seconds) can not hear the state of opposite end user voice, and make a call after the overtime problem of the call drop that reconstruction failure causes of RLT.Can effectively reduce call drop, promote user's perceptibility; And help operator in test, and reduce cutting off rate, avoid occurring continuity phenomenon of poor quality, effectively promoted the downlink network quality.
Further, by at BSC end the hang-up timer being set, that does not stop in the time of can also effectively avoiding the BSC end unstable in network condition a period of time sends the situation of switching command to the mobile phone side, further reduces the ineffective occupation of the network bandwidth.
Need to prove that each module in the system embodiment of the present invention or the operation principle of submodule and processing procedure can repeat no more referring to the associated description among above-mentioned Fig. 1 and the method embodiment shown in Figure 3 herein.
For the ease of the clear technical scheme of describing the embodiment of the invention, in inventive embodiment, adopted printed words such as " first ", " second " that function is distinguished with the essentially identical identical entry of effect or similar item, it will be appreciated by those skilled in the art that printed words such as " first ", " second " do not limit quantity and execution order.
One of ordinary skill in the art will appreciate that, realize that all or part of step in above-described embodiment method is to instruct relevant hardware to finish by program, described program can be stored in the computer read/write memory medium, this program is when carrying out, comprise the steps: (step of method), described storage medium, as: ROM/RAM, magnetic disc, CD etc.
The above is preferred embodiment of the present invention only, is not for limiting protection scope of the present invention.All any modifications of doing within the spirit and principles in the present invention, be equal to replacement, improvement etc., all be included in protection scope of the present invention.
Claims (10)
1. signal fast switch over method, it is characterized in that, at the base station controller BSC end down-run survey report is set and receives timer, be used for the time interval that monitoring BSC receives the down-run survey report, with, the time-out count device is used for the expired times that the described down-run survey report of record receives timer, and described method comprises:
In a descending level window sample cycle, judge whether described down-run survey report receives timer overtime; Described down-run survey report receives the timing value of timer greater than a down-run survey reporting period and less than a descending level window sample cycle;
When described down-run survey report receives timer expiry, trigger described time-out count device and record described down-run survey report reception timer expiry once; Described time-out count device added up in the current descending level window sample cycle;
Judge whether described time-out count device reaches the maximum count number of times in current descending level window sample cycle inside counting value;
When described time-out count device when current descending level window sample cycle inside counting value reaches described maximum count number of times, BSC carries out homogenizing to the adjacent area level sampling in the whole down-run survey reports that comprise in the current descending level window sample cycle, according to level homogenization result and neighboring cell load information calculations neighboring area signal intensity, and initiate channel to the strongest adjacent area of described signal and activate application, after channel activates successfully, initiate urgent switching command to the mobile phone side, realize promptly switching.
2. signal fast switch over method according to claim 1 is characterized in that, also is provided with the hang-up timer at the BSC end, is used for the suspension time of control handover operation; When the time-out count device when current descending level window sample cycle inside counting value reaches described maximum count number of times, described method also comprises:
Trigger described hang-up timer;
In described hang-up timer timing course, do not carry out and describedly judge that the report of described down-run survey receives whether overtime step of timer;
If described hang-up timer expiry, then carry out and describedly judge that described down-run survey report receives whether overtime step of timer.
3. signal fast switch over method according to claim 2 is characterized in that, described method also comprises:
After the BSC termination was received the channel handover success, it was timeout mode that described hang-up timer is set.
4. signal fast switch over method according to claim 1 and 2 is characterized in that, the described descending level window sample cycle is less than or equal to the set point of Radio Link overtime timer RLT; The maximum count number of times of described time-out count device is less than the value of descending level window.
5. signal fast switch over method according to claim 1 and 2 is characterized in that, described method also comprises:
When receiving down-run survey when report, the BSC described down-run survey report of resetting receives the timing value of timer, and described reception timer restarts regularly;
When the line level window slides instantly, the BSC count value of described overtime timer of resetting, described overtime timer restarts counting.
6. signal fast switch over method according to claim 1 and 2 is characterized in that, described method also comprises:
The BSC end arranges or revises the timing value that described down-run survey report receives timer according to demand;
The BSC end arranges or revises the maximum count number of times of described time-out count device according to demand;
When satisfying first condition, start described down-run survey report and receive timer; With
When satisfying second condition, close described down-run survey report and receive timer;
Described first condition comprises:
The BSC termination is received when first the effective down-run survey after the channel assignment success is reported; Or
The BSC termination is received when first the effective down-run survey behind the channel handover success is reported;
Described second condition comprises:
When the release command of BSC transmitting channel.
7. a base station controller BSC is characterized in that, is provided with: the down-run survey report receives timer, and described down-run survey report receives timer and is used for the time interval that monitoring BSC receives the down-run survey report; With, the time-out count device is used for the expired times that the described down-run survey report of record receives timer;
Described base station controller BSC comprises:
Overtime judge module was used in a descending level window sample cycle, judged whether described down-run survey report receives timer overtime; The timing value that the report of described down-run survey receives timer needs at least greater than a down-run survey reporting period and less than the value of a descending level window;
Counting module is used for when described down-run survey report receives timer expiry, triggers described time-out count device and records described down-run survey report reception timer expiry once; Described time-out count device added up in the current descending level window sample cycle;
The switching judging module is used for judging whether described time-out count device reaches the maximum count number of times in current descending level window sample cycle inside counting value;
Handover module, be used for when described time-out count device when current descending level window sample cycle inside counting value reaches described maximum count number of times, BSC carries out homogenizing to the adjacent area level sampling in the whole down-run survey reports that comprise in the current descending level window sample cycle, according to level homogenization result and neighboring cell load information calculations neighboring area signal intensity, and initiate channel to the strongest adjacent area of described signal and activate application, after channel activates successfully, initiate urgent switching command to the mobile phone side, realize promptly switching.
8. the quick switched system of signal according to claim 7 is characterized in that, described base station controller BSC also is provided with the hang-up timer, is used for the suspension time of control handover operation;
Described BSC also comprises:
Trigger to hang up module, be used for when the time-out count device when current descending level window sample cycle inside counting value reaches described maximum count number of times, trigger described hang-up timer;
Hang up module, be used at described hang-up timer timing course, hang up described overtime judge module; When described hang-up timer expiry, start described overtime judge module.
9. the quick switched system of signal according to claim 8 is characterized in that, described BSC also comprises:
Force to finish module, be used for after the BSC termination is received the channel handover success, it is timeout mode that described hang-up timer is set.
10. according to the quick switched system of each described signal of claim 7-9, it is characterized in that described BSC also comprises:
The first replacement module is used for when receiving the down-run survey report, and the described down-run survey report of resetting receives the timing value of timer, and described reception timer restarts regularly;
The second replacement module, when being used for that the line level window slides instantly, the BSC count value of described overtime timer of resetting, described overtime timer restarts counting;
First modified module is used for arranging or revising according to demand the timing value that described down-run survey report receives timer;
Second modified module is for the maximum count number of times that arranges or revise described time-out count device according to demand;
Start module, be used for when satisfying first condition, start described report and receive timer;
Closing module is used for when satisfying second condition, closes described report and receives timer;
Described first condition comprises:
The BSC termination is received when first the effective down-run survey after the channel assignment success is reported; Or
The BSC termination is received when first the effective down-run survey behind the channel handover success is reported;
Described second condition comprises:
When the release command of BSC transmitting channel;
The described descending level window sample cycle is less than or equal to the set point of Radio Link overtime timer RLT; The maximum count number of times of described time-out count device is less than the value of descending level window.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108738092A (en) * | 2018-06-07 | 2018-11-02 | Oppo（重庆）智能科技有限公司 | Method for switching network and Related product |
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| US20090190554A1 (en) * | 2008-01-25 | 2009-07-30 | Cho Yoon Jung | Method for performing handover procedure and creating data |
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