CN101583166B - Air interface converting method, data transmitting method, communication system and relevant equipment - Google Patents
Air interface converting method, data transmitting method, communication system and relevant equipment Download PDFInfo
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- CN101583166B CN101583166B CN2008100375736A CN200810037573A CN101583166B CN 101583166 B CN101583166 B CN 101583166B CN 2008100375736 A CN2008100375736 A CN 2008100375736A CN 200810037573 A CN200810037573 A CN 200810037573A CN 101583166 B CN101583166 B CN 101583166B
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Abstract
The embodiment of the invention discloses an air interface converting method, a data transmitting method, a communication system and relevant equipment, which are used for improving user experience. The air interface converting method comprises the following steps: receiving conversion preparation indication sent by a source base station by a user device; searching a target base station according to a gap of the conversion preparation indication for transmitting and receiving user data at an air interface, and synchronizing with the searched target base station; and entering the conversion interruption interval to executing the air interface conversion when meeting the preset condition. The embodiment of the invention also provides a data transmitting method, a communication system and relevant equipment.
Description
Technical field
The present invention relates to communication field, relate in particular to a kind of air interface converting method and data transmission method and communication system and relevant device.
Background technology
The handover scheme of the Long Term Evolution of prior art (LTE, Long Term Evolution) comprises switching and prepares, switches and carry out and three steps of source resource release.In order to realize that data are not lost in the handoff procedure, need set up the forward direction conversion link.
The forward direction conversion link is meant in the handoff procedure of LTE, and source base station (NB, NodeB) after sending Handover Command order, source base station may still be cached with the data that need send to subscriber equipment (UE, User Equipment); In order to realize that data are not lost in the handoff procedure, need between source base station and target BS, set up bearing link, so that the source base station data in buffer can be transmitted to target BS.
Air interface converting method of the prior art is:
(1) switches preparation;
In switching the process of preparing, need between source base station and target BS, carry out communication, and set up the forward direction conversion link.
(2) source base station sends Handover Command to UE and is used for indication and begins to eat dishes without rice or wine to switch;
(3) UE collects the target BS relevant information, and carries out synchronously with target BS;
(4) finish synchronously after, UE sends Handover Confirm to target BS and eats dishes without rice or wine to switch with notice and finish.
The inventor finds in realizing process of the present invention, in the above-mentioned flow process, from step (2), finish to step (4), interior UE of this section period need collect the relevant information of target BS and carry out synchronously with target BS, the interior UE of section can not receive and dispatch user data at this moment, is looked at as HO-break duration during this period of time.
Because UE can not receive and dispatch user data in the HO-break duration, so can influence user's impression, therefore need shorten HO-break duration as much as possible, and UE collects the relevant information of target BS and carries out synchronous process with target BS and can need to consume a large amount of time from above-mentioned prior art, therefore causes HO-break duration long and influence user experience;
Secondly, need set up forward direction conversion link between source base station and the target BS in handoff preparation phase in the above-mentioned prior art, therefore can take system bearing, thereby increase implementation complexity and wasted system resource.
Summary of the invention
The embodiment of the invention provides a kind of air interface converting method and data transmission method and communication system and relevant device, can improve user experience.
The air interface converting method that the embodiment of the invention provides comprises: indication is prepared in the switching that subscriber equipment reception sources base station sends; Prepare indication in the ferret out base station, space of eating dishes without rice or wine to receive and dispatch user data according to described switching, and carry out synchronously with the target BS that searches; When satisfying prerequisite, enter HO-break duration and carry out the switching of eating dishes without rice or wine.
The data transmission method that the embodiment of the invention provides comprises: source base station sends handoff request message to target BS; The switching request acknowledgement message of receiving target base station feedback; Send downlink bearing link switchover message to mobile management entity, described downlink bearing link switchover message is used for by described mobile management entity indicating service gateway downlink data being sent to target BS.
The communication system that the embodiment of the invention provides comprises: source base station is used to send downlink bearing link switchover message; Mobile management entity is used to receive the downlink bearing link switchover message that described source base station sends, and sends user's face update inquiry information, and described user's face update inquiry information is used for indication downlink path is switched to target BS; Gateway is used to receive user's face update inquiry information that described mobile management entity sends, and sends downlink data according to described user's face update inquiry information to target BS; Target BS is used to receive the downlink data that gateway sends.
The subscriber equipment that the embodiment of the invention provides comprises: the indication receiving element is used for the switching preparation indication that the reception sources base station sends; The search lock unit is used for preparing indication in the ferret out base station, space of eating dishes without rice or wine to receive and dispatch user data according to described switching, and carries out synchronously with the target BS that searches; The switch unit of eating dishes without rice or wine is used for when satisfying prerequisite, enters HO-break duration and carries out and eat dishes without rice or wine to switch.
As can be seen from the above technical solutions, the embodiment of the invention has the following advantages:
In the present embodiment, the switching that subscriber equipment reception sources base station sends prepares to prepare indication in the ferret out base station, space of eating dishes without rice or wine to receive and dispatch user data according to described switching after the indication, and carries out synchronously with the target BS that searches; And when satisfying prerequisite, just carry out and eat dishes without rice or wine to switch to switch to described target BS.Promptly when needs switch, subscriber equipment utilized the ferret out base station, space of eating dishes without rice or wine to receive and dispatch user data earlier before formal execution is switched, and carry out synchronously with target BS, and when formally switching, promptly enter after the HO-break duration, because subscriber equipment has been fulfiled some associative operations ahead of schedule, thus the speed that may accelerate to switch, thus reduce HO-break duration.
Description of drawings
Fig. 1 is the overall embodiment schematic diagram of air interface converting method in the embodiment of the invention;
Fig. 2 is the air interface converting method first embodiment schematic diagram in the embodiment of the invention;
Fig. 3 is the air interface converting method second embodiment schematic diagram in the embodiment of the invention;
Fig. 4 is air interface converting method the 3rd an embodiment schematic diagram in the embodiment of the invention;
Fig. 5 is air interface converting method the 4th an embodiment schematic diagram in the embodiment of the invention;
Fig. 6 is the data transmission method first embodiment schematic diagram in the embodiment of the invention;
Fig. 7 is a communication system embodiment schematic diagram in the embodiment of the invention;
Fig. 8 is a subscriber equipment embodiment schematic diagram in the embodiment of the invention.
Embodiment
The embodiment of the invention provides a kind of air interface converting method and data transmission method and communication system and relevant device, improves user experience thereby be used to reduce HO-break duration.
See also Fig. 1, the overall embodiment of air interface converting method comprises in the embodiment of the invention:
101, indication is prepared in the switching of subscriber equipment reception sources base station transmission;
In the present embodiment, hold consultation back decision subscriber equipment need eat dishes without rice or wine to switch the time when source base station and target BS, source base station sends to switch to subscriber equipment prepares indication, carries the carrier frequency information and the frequency point information of target BS during this preparations is indicated.
Indication is prepared in this switching can specifically be divided into three kinds of situations, specifically will be elaborated in follow-up embodiment.
102, subscriber equipment is prepared indication in the ferret out base station, space of eating dishes without rice or wine to receive and dispatch user data according to described switching;
Subscriber equipment receives the switching of source base station transmission and prepares after the indication, still utilize and eat dishes without rice or wine to receive and dispatch user data, but in general subscriber equipment has a planning to the use of the channel of eating dishes without rice or wine, can know subscriber equipment need which the time use the channel transceiver user data of eating dishes without rice or wine, then can utilize the ferret out base station, space of eating dishes without rice or wine, specifically can inquire about the target BS that satisfies this carrier frequency information and frequency point information by the search machine according to switching carrier frequency information and the frequency point information prepared in the indication, the concrete process of the ferret out base station, space of eating dishes without rice or wine of utilizing of subscriber equipment is prior art, does not limit herein.
103, subscriber equipment and the target BS that searches carry out synchronously;
User equipment searches is carried out time synchronized by common signal channel and the target BS that presets after target BS.
104, when satisfying prerequisite, enter HO-break duration and carry out the switching of eating dishes without rice or wine.
After having satisfied the condition that presets, subscriber equipment formally eats dishes without rice or wine to switch, and promptly enters HO-break duration, and switch to target BS in this HO-break duration.
Concrete prerequisite prepares to indicate three kinds of situations of being divided relevant with aforementioned switching, will be described in detail in follow-up embodiment.
In the present embodiment, the switching that subscriber equipment reception sources base station sends prepares to prepare indication in the ferret out base station, space of eating dishes without rice or wine to receive and dispatch user data according to described switching after the indication, and carries out synchronously with the target BS that searches; And when satisfying prerequisite, just carry out and eat dishes without rice or wine to switch to switch to described target BS.Promptly when needs switch, subscriber equipment utilized the ferret out base station, space of eating dishes without rice or wine to receive and dispatch user data earlier before formal execution is switched, and carry out synchronously with target BS, and when formally switching, promptly enter after the HO-break duration, because subscriber equipment has been fulfiled some associative operations ahead of schedule, thus the speed that may accelerate to switch, thus reduce HO-break duration.
Respectively three kinds of situations of handover preparation information are described below:
One, adopt the synchronization message Handover Sync mode of switching:
In the manner, after definite switching of will eating dishes without rice or wine, source base station sends to subscriber equipment and switches synchronization message so that subscriber equipment can carry out the target BS search in advance, after user equipment searches is finished, switch confirmation of synchronization message Handover Sync Ack to the source base station feedback, source base station sends to switch to subscriber equipment again and carries out message Handover Command afterwards, then subscriber equipment formally begins to eat dishes without rice or wine to switch, specifically see also Fig. 2, air interface converting method first embodiment comprises in the embodiment of the invention:
201, handover preparation stage flow process;
This flow process is to measure negotiation between source base station and the subscriber equipment to determine whether the switching of eating dishes without rice or wine, after determining to eat dishes without rice or wine to switch, source base station eats dishes without rice or wine to switch to target base station requests again, and carries out the down link location, concrete reciprocal process is prior art, repeats no more herein.
202, source base station sends to subscriber equipment and switches synchronization message;
After the handover preparation stage finished, source base station sent to subscriber equipment and switches synchronization message, is used to indicate subscriber equipment to switch preparation, carries the carrier frequency information and the frequency point information of target BS in this switching synchronization message.
203, subscriber equipment is eating dishes without rice or wine to receive and dispatch ferret out base station, space;
Subscriber equipment receives after the switching synchronization message of source base station transmission, still utilize and eat dishes without rice or wine to receive and dispatch user data, but in general subscriber equipment has a planning to the use of the channel of eating dishes without rice or wine, can know subscriber equipment need which the time use the channel transceiver user data of eating dishes without rice or wine, then can utilize the ferret out base station, space of eating dishes without rice or wine, specifically can inquire about the target BS that satisfies this carrier frequency information and frequency point information by the search machine according to switching carrier frequency information and the frequency point information prepared in the indication, the concrete process of the ferret out base station, space of eating dishes without rice or wine of utilizing of subscriber equipment is prior art, does not limit herein.
204, carry out synchronizing process between subscriber equipment and the target BS;
After subscriber equipment had been determined target BS, by carrying out time synchronized between the common signal channel that presets and the target BS, concrete synchronizing process did not limit.
205, carry out the up link location between subscriber equipment and the target BS;
206, subscriber equipment sends to source base station and switches confirmation of synchronization message;
When user equipment searches has arrived target BS, and finished time synchronized with target BS, and carried out the up link location with target BS, then subscriber equipment switches confirmation of synchronization to the source base station feedback, prepares to have finished to eat dishes without rice or wine to switch to source base station indication subscriber equipment.
207, source base station sends to switch to subscriber equipment and carries out message;
After source base station acquires the switching confirmation of synchronization message that subscriber equipment sends, know that subscriber equipment has been finished to eat dishes without rice or wine to switch to prepare, then send to switch and carry out message to subscriber equipment, eat dishes without rice or wine to switch with formal execution of indication subscriber equipment.
208, subscriber equipment is carried out the switching flow of eating dishes without rice or wine;
Subscriber equipment receives the switching of source base station transmission and carries out after the message, and the promptly formal switching flow of eating dishes without rice or wine of carrying out promptly enters HO-break duration, and in the period, subscriber equipment need break away from from source base station at this section, and is attached to target BS to finish the switching flow of eating dishes without rice or wine.
209, subscriber equipment sends switch acknowledgment message to target BS.
After subscriber equipment is finished the switching flow of eating dishes without rice or wine, send switch acknowledgment message to target BS, then HO-break duration finishes, and subscriber equipment can utilize again and eat dishes without rice or wine to receive and dispatch user data.
In the present embodiment, when subscriber equipment after source base station send to switch confirmation of synchronization message, source base station can switch to the subscriber equipment feedback carries out message, then subscriber equipment can judge whether to receive to switch and carry out message, if receive to switch and carry out message, then determine to satisfy the condition that presets, then can begin to control switching flow.
Two, adopt preset timer to send and switch the mode of carrying out message:
In the manner, after definite switching of will eating dishes without rice or wine, source base station sends to subscriber equipment and switches synchronization message so that subscriber equipment can carry out the target BS search in advance, source base station starts timer simultaneously, after timer reaches the time of presetting, send switching to subscriber equipment and carry out message HandoverCommand, then subscriber equipment formally begins to eat dishes without rice or wine to switch, specifically see also Fig. 3, air interface converting method second embodiment comprises in the embodiment of the invention:
301, handover preparation stage flow process;
This flow process is to measure negotiation between source base station and the subscriber equipment to determine whether the switching of eating dishes without rice or wine, after determining to eat dishes without rice or wine to switch, source base station eats dishes without rice or wine to switch to target base station requests again, and carries out the down link location, concrete reciprocal process is prior art, repeats no more herein.
302, source base station sends to subscriber equipment and switches synchronization message;
After the handover preparation stage finished, source base station sent to subscriber equipment and switches synchronization message, is used to indicate subscriber equipment to switch preparation, carries the carrier frequency information and the frequency point information of target BS in this switching synchronization message.
303, source base station starts timer;
In the present embodiment, when source base station promptly starts timer when subscriber equipment sends the switching synchronization message.
304, subscriber equipment is eating dishes without rice or wine to receive and dispatch ferret out base station, space;
Subscriber equipment receives after the switching synchronization message of source base station transmission, still utilize and eat dishes without rice or wine to receive and dispatch user data, but in general subscriber equipment has a planning to the use of the channel of eating dishes without rice or wine, can know subscriber equipment need which the time use the channel transceiver user data of eating dishes without rice or wine, then can utilize the ferret out base station, space of eating dishes without rice or wine, specifically can inquire about the target BS that satisfies this carrier frequency information and frequency point information by the search machine according to switching carrier frequency information and the frequency point information prepared in the indication, the concrete process of the ferret out base station, space of eating dishes without rice or wine of utilizing of subscriber equipment is prior art, does not limit herein.
305, carry out synchronizing process between subscriber equipment and the target BS;
After subscriber equipment had been determined target BS, by carrying out time synchronized between the common signal channel that presets and the target BS, concrete synchronizing process did not limit.
306, carry out the up link location between subscriber equipment and the target BS;
307, judge that timer overflows, promptly timer reaches the time of presetting;
Need to prove that the concrete numerical value of this timer can determine according to actual conditions, in general, smaller for what can be provided with switching frequently, and for striding frequently, it is bigger that cross-domain (for example from the LTE network to legacy network) then can be provided with, and concrete numerical value does not limit.
308, source base station sends to switch to subscriber equipment and carries out message;
After source base station judges that timer reaches the numerical value that presets, then send to switch and carry out message to subscriber equipment, eat dishes without rice or wine to switch with formal execution of indication subscriber equipment.
309, subscriber equipment is carried out the switching flow of eating dishes without rice or wine;
Subscriber equipment receives the switching of source base station transmission and carries out after the message, and the promptly formal switching flow of eating dishes without rice or wine of carrying out promptly enters HO-break duration, and in the period, subscriber equipment need break away from from source base station at this section, and is attached to target BS to finish the switching flow of eating dishes without rice or wine.
310, subscriber equipment sends switch acknowledgment message to target BS.
After subscriber equipment is finished the switching flow of eating dishes without rice or wine, send switch acknowledgment message to target BS, then HO-break duration finishes, and subscriber equipment can utilize again and eat dishes without rice or wine to receive and dispatch user data.
In the present embodiment, after source base station knows that timer reaches the numerical value that presets, can switch to the subscriber equipment feedback and carry out message, then subscriber equipment can judge whether to receive to switch and carry out message, if receive to switch and carry out message, then determine to satisfy the condition that presets, then can begin to control switching flow.
Need to prove, because the concrete numerical value of timer can be determined according to actual conditions, when so the possibility timer reaches default value in actual applications, subscriber equipment is not finished the ferret out base station fully, carry out synchronously and the up link location process with target BS, be in the foregoing description, when step 307 is triggered, possible step 304,305 and 306 do not finish fully, if do not finish fully, then after receiving switching execution message, enter HO-break duration, and continue uncompleted operation.
Two, adopt the mode of switching of carrying out constantly that presets:
In the manner, after definite switching of will eating dishes without rice or wine, source base station sends to switch to subscriber equipment carries out message, in this message, carry one and carry out time information, be used to indicate subscriber equipment at which switching flow of constantly eating dishes without rice or wine automatically, subscriber equipment this switching of judgement after receiving this switching execution message is carried out in message and is carried the execution time information, then carry out switching preparation process, reach this execution time information moment corresponding until the system clock current time, then formally begin to eat dishes without rice or wine to switch, specifically see also Fig. 4, air interface converting method the 3rd embodiment comprises in the embodiment of the invention:
401, handover preparation stage flow process;
This flow process is to measure negotiation between source base station and the subscriber equipment to determine whether the switching of eating dishes without rice or wine, after determining to eat dishes without rice or wine to switch, source base station eats dishes without rice or wine to switch to target base station requests again, and carries out the down link location, concrete reciprocal process is prior art, repeats no more herein.
402, source base station sends to switch to subscriber equipment and carries out message;
After the handover preparation stage finishes, source base station sends to switch to subscriber equipment carries out message, this switching is carried out to carry in the message needs to carry out the execution time information of eating dishes without rice or wine to switch, be used to indicate subscriber equipment formally to eat dishes without rice or wine to switch, carry out carrier frequency information and the frequency point information that carries target BS in the message in this switching in this moment.
403, subscriber equipment is eating dishes without rice or wine to receive and dispatch ferret out base station, space;
Subscriber equipment receives the switching of source base station transmission and carries out after the message, judge in this switching execution message and carry the execution time information, then know and to switch preparation, then still utilize and eat dishes without rice or wine to receive and dispatch user data, but in general subscriber equipment has a planning to the use of the channel of eating dishes without rice or wine, can know subscriber equipment need which the time use the channel transceiver user data of eating dishes without rice or wine, then can utilize the ferret out base station, space of eating dishes without rice or wine, specifically can inquire about the target BS that satisfies this carrier frequency information and frequency point information by the search machine according to switching carrier frequency information and the frequency point information prepared in the indication, the concrete process of the ferret out base station, space of eating dishes without rice or wine of utilizing of subscriber equipment is prior art, does not limit herein.
404, carry out synchronizing process between subscriber equipment and the target BS;
After subscriber equipment had been determined target BS, by carrying out time synchronized between the common signal channel that presets and the target BS, concrete synchronizing process did not limit.
405, carry out the up link location between subscriber equipment and the target BS;
406, judge that the system clock current time reaches execution time information moment corresponding;
Need to prove that this execution can determine that concrete numerical value does not limit constantly according to actual conditions.
407, subscriber equipment is carried out the switching flow of eating dishes without rice or wine;
Subscriber equipment judges that the system clock current time reaches after the execution time information moment corresponding, the promptly formal switching flow of eating dishes without rice or wine of carrying out promptly enters HO-break duration, at this section in the period, subscriber equipment need break away from from source base station, and is attached to target BS to finish the switching flow of eating dishes without rice or wine.
408, subscriber equipment sends switch acknowledgment message to target BS.
After subscriber equipment is finished the switching flow of eating dishes without rice or wine, send switch acknowledgment message to target BS, then HO-break duration finishes, and subscriber equipment can utilize again and eat dishes without rice or wine to receive and dispatch user data.
In the present embodiment, when subscriber equipment is determined can formally eat dishes without rice or wine to switch after the system clock current time reaches execution time information moment corresponding, then subscriber equipment can judge whether the system clock current time reaches execution time information moment corresponding, if reach, then determine to satisfy the condition that presets, then can begin to control switching flow.
Need to prove, because concrete execution time information can be determined according to actual conditions, so in the time of may reaching this moment in actual applications, subscriber equipment is not finished the ferret out base station fully, carry out synchronously and the up link location process with target BS, be in the foregoing description, when step 406 is triggered, possible step 403,404 and 405 do not finish fully, if do not finish fully, then after receiving switching execution message, enter HO-break duration, and continue uncompleted operation.
Above-mentioned three embodiment only are specific implementation, also have other situation in actual applications, do not do herein and give unnecessary details.
By above-mentioned three embodiment as can be seen, can before formally eating dishes without rice or wine to switch, carry out the switching beamhouse operation of part or all by subscriber equipment in the embodiment of the invention, thus HO-break duration can be shortened, thus improve user experience.
In the foregoing description, whether need set up forward direction conversion link, but in order to reduce resource waste, simplify switching flow if not limiting, can not set up the forward direction conversion link equally, concrete, be that example describes below with Fig. 5, do not set up the forward direction conversion link in the following examples, and combine explanation with above-mentioned first embodiment, being understandable that, can be other embodiment equally, does not limit herein:
See also Fig. 5, air interface converting method the 4th embodiment comprises in the embodiment of the invention:
501, the handover decisions stage;
In the present embodiment, this flow process is to measure negotiation between source base station and the subscriber equipment to determine whether the switching of eating dishes without rice or wine.
502, source base station sends handoff request message to target BS;
After switching when determining to eat dishes without rice or wine, source base station eats dishes without rice or wine to switch to target base station requests again, promptly sends handoff request message.
503, target BS feeds back switching request acknowledgement message to source base station;
Target BS receives after the handoff request message of source base station transmission, and this message is carried out control of authority, and after verification was passed through, then to source base station feedback switching request acknowledgement message, indication can be switched.
In the present embodiment, this step is not set up the forward direction conversion link.
504, source base station and subscriber equipment carry out the down link location;
505, source base station sends to subscriber equipment and switches synchronization message;
After the handover preparation stage finished, source base station sent to subscriber equipment and switches synchronization message, is used to indicate subscriber equipment to switch preparation, carries the carrier frequency information and the frequency point information of target BS in this switching synchronization message.
506, source base station sends downlink bearing link switchover message to mobile management entity (MME, Mobility Management Entity), and promptly user's face upgrades and switches downlink path (User Plane updateSwitch DL path);
Need to prove, source base station is when sending the switching synchronization message to subscriber equipment, also send downlink bearing link switchover message, be used to indicate network side that downlink data is sent to target BS, can carry the relevant information of target BS in this message to MME.
507, MME sends user's face update inquiry information to gateway;
MME sends user's face update inquiry information to gateway, is used for indicating service gateway the path of down link is switched to target BS, can carry the relevant information of target BS in this message equally.
508, gateway switches downlink path;
Gateway switches to target BS according to the relevant information of the target BS in user's face update inquiry information with down link.
509, gateway sends downlink data to target BS;
The downlink data that target BS receives the gateway transmission carries out buffer memory to downlink data afterwards.
510, gateway sends user's face renewal response to MME;
Gateway sends user's face renewal response to MME and is used to indicate downlink path to switch to target BS.
511, subscriber equipment is eating dishes without rice or wine to receive and dispatch ferret out base station, space;
Subscriber equipment receives after the switching synchronization message of source base station transmission, still utilize and eat dishes without rice or wine to receive and dispatch user data, but in general subscriber equipment has a planning to the use of the channel of eating dishes without rice or wine, can know subscriber equipment need which the time use the channel transceiver user data of eating dishes without rice or wine, then can utilize the ferret out base station, space of eating dishes without rice or wine, specifically can inquire about the target BS that satisfies this carrier frequency information and frequency point information by the search machine according to switching carrier frequency information and the frequency point information prepared in the indication, the concrete process of the ferret out base station, space of eating dishes without rice or wine of utilizing of subscriber equipment is prior art, does not limit herein.
512, source base station remaining downlink data in subscriber equipment transmission self buffer memory;
Need to prove, in the present embodiment, when also preserving remaining downlink data in the source base station, then send remaining downlink data in self buffer memory,, then do not need to carry out this step 512 if when not had remaining downlink data in the source base station to subscriber equipment.
513, carry out synchronizing process between subscriber equipment and the target BS;
Subscriber equipment is by carrying out time synchronized between the common signal channel that presets and the target BS, and concrete synchronizing process does not limit.
514, carry out the up link location between subscriber equipment and the target BS;
515, subscriber equipment sends to source base station and switches confirmation of synchronization message;
When user equipment searches has arrived target BS, and finished time synchronized with target BS, and carried out the up link location with target BS, then subscriber equipment switches confirmation of synchronization to the source base station feedback, prepares to have finished to eat dishes without rice or wine to switch to source base station indication subscriber equipment.
516, judge whether remaining downlink data sends in self buffer memory of source base station and finish,, if not, then continue to send, finish until transmission if then execution in step 517;
Need to prove that above-mentioned steps 506 to step 510 and step 511 do not have execution sequence between 516, promptly step 506 to step 510 can be carried out to 516 simultaneously with step 511.
517, source base station sends to switch to subscriber equipment and carries out message;
After source base station acquires the switching confirmation of synchronization message that subscriber equipment sends, know that subscriber equipment has been finished to eat dishes without rice or wine to switch to prepare, then send to switch and carry out message to subscriber equipment, eat dishes without rice or wine to switch with formal execution of indication subscriber equipment.
518, subscriber equipment is carried out the switching flow of eating dishes without rice or wine;
Subscriber equipment receives the switching of source base station transmission and carries out after the message, and the promptly formal switching flow of eating dishes without rice or wine of carrying out promptly enters HO-break duration, and in the period, subscriber equipment need break away from from source base station at this section, and is attached to target BS to finish the switching flow of eating dishes without rice or wine.
519, subscriber equipment sends switch acknowledgment message to target BS.
After subscriber equipment is finished the switching flow of eating dishes without rice or wine, send switch acknowledgment message to target BS, then HO-break duration finishes, and subscriber equipment can utilize again and eat dishes without rice or wine to receive and dispatch user data.
In the present embodiment, when subscriber equipment after source base station send to switch confirmation of synchronization message, source base station can switch to the subscriber equipment feedback carries out message, then subscriber equipment can judge whether to receive to switch and carry out message, if receive to switch and carry out message, then determine to satisfy the condition that presets, then can begin to control switching flow.
Do not need to set up the forward direction conversion link in the foregoing description, and make gateway directly downlink data is sent to target BS, if also preserve downlink data in the source base station, then, source base station just indicate subscriber equipment formally to eat dishes without rice or wine to switch after finishing when all sending remaining downlink data in self buffer memory, therefore loss of data can not take place in handoff procedure, so reduced the flow process complexity, and do not needed to take bearing resource, reduced to resource waste.
Need to prove, do not need to set up the forward direction conversion link in the above-mentioned data transmission method, and this data transmission method is not limited to adopt the switching mode described in the previous embodiment, promptly this data transmission method can adopt switching mode traditional in the prior art equally, below separately the data transmission method embodiment in the embodiment of the invention is described in detail, see also Fig. 6, the data transmission method embodiment in the embodiment of the invention comprises:
601, the handover decisions stage;
In the present embodiment, this flow process is to measure negotiation between source base station and the subscriber equipment to determine whether the switching of eating dishes without rice or wine.
602, source base station sends handoff request message to target BS;
After switching when determining to eat dishes without rice or wine, source base station eats dishes without rice or wine to switch to target base station requests again, promptly sends handoff request message.
603, target BS feeds back switching request acknowledgement message to source base station;
Target BS receives after the handoff request message of source base station transmission, and this message is carried out control of authority, and after verification was passed through, then to source base station feedback switching request acknowledgement message, indication can be switched.
In the present embodiment, this step is not set up the forward direction conversion link.
604, source base station and subscriber equipment carry out the down link location;
605, source base station sends downlink bearing link switchover message to MME, and promptly user's face upgrades and switches downlink path (User Plane update Switch DL path);
Source base station sends downlink bearing link switchover message to MME, is used to indicate network side that downlink data is sent to target BS, can carry the relevant information of target BS in this message.
606, MME sends user's face update inquiry information to gateway;
MME sends user's face update inquiry information to gateway, is used for indicating service gateway the path of down link is switched to target BS, can carry the relevant information of target BS in this message equally.
607, gateway switches downlink path;
Gateway switches to target BS according to the relevant information of the target BS in user's face update inquiry information with down link.
608, gateway sends downlink data to target BS;
The downlink data that target BS receives the gateway transmission carries out buffer memory to downlink data afterwards.
609, gateway sends user's face renewal response to MME;
Gateway sends user's face renewal response to MME and is used to indicate downlink path to switch to target BS.
Need to prove that after the step 609, subscriber equipment also needs to eat dishes without rice or wine to switch according to the indication of source base station, concrete switching mode does not limit, and can be switching mode of the prior art, can be three kinds of switching modes describing in the previous embodiment yet.
Below the communication system embodiment in the embodiment of the invention is described, see also Fig. 7, the communication system embodiment in the embodiment of the invention comprises:
Subscriber equipment 701 is used for eating dishes without rice or wine to switch according to the indication of source base station;
Source base station 702 is used for sending downlink bearing link switchover message to mobile management entity 703;
Mobile management entity 703, be used to receive the downlink bearing link switchover message that described source base station 702 sends, send user's face update inquiry information to gateway 704, described user's face update inquiry information is used for indication downlink path is switched to target BS 705;
Gateway 704 is used to receive user's face update inquiry information that described mobile management entity 703 sends, and sends downlink data according to described user's face update inquiry information to target BS 705;
Target BS 705 is used to receive the downlink data that gateway 704 sends;
Described source base station 702 also is used for sending the remaining downlink data of self buffer memory to subscriber equipment 701.
Below the subscriber equipment embodiment in the embodiment of the invention is described, sees also Fig. 8, the subscriber equipment embodiment in the embodiment of the invention comprises:
Indication receiving element 801 is used for the switching preparation indication that the reception sources base station sends;
Search lock unit 802 is used for preparing indication in the ferret out base station, space of eating dishes without rice or wine to receive and dispatch user data according to the switching that indication receiving element 801 receives, and carries out synchronously with the target BS that searches;
The switch unit 803 of eating dishes without rice or wine is used for when satisfying prerequisite, enters HO-break duration and carries out and eat dishes without rice or wine to switch.
Subscriber equipment in the present embodiment can also comprise:
Handover trigger unit 804 is used to judge whether to satisfy prerequisite, if satisfy, then triggers the described switch unit 803 of eating dishes without rice or wine and carries out the switching of eating dishes without rice or wine.
Handover trigger unit 804 in the present embodiment comprises with in the lower unit at least one:
First trigger element 8041 is used to judge whether to receive the switching execution message that source base station sends, if receive, then determines to satisfy prerequisite;
Second trigger element 8042 is used for judging whether the system clock current time reaches described switching and prepare the capable time information moment corresponding that indication comprises, if reach, then determines to satisfy prerequisite.
In the present embodiment, the switching that subscriber equipment reception sources base station sends prepares to prepare indication in the ferret out base station, space of eating dishes without rice or wine to receive and dispatch user data according to described switching after the indication, and carries out synchronously with the target BS that searches; And when satisfying prerequisite, just carry out and eat dishes without rice or wine to switch to switch to described target BS.Promptly when needs switch, subscriber equipment utilized the ferret out base station, space of eating dishes without rice or wine to receive and dispatch user data earlier before formal execution is switched, and carry out synchronously with target BS, and when formally switching, promptly enter after the HO-break duration, because subscriber equipment has been fulfiled some associative operations ahead of schedule, thus the speed that may accelerate to switch, thus reduce HO-break duration.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to finish by program, described program can be stored in a kind of computer-readable recording medium, this program comprises the steps: when carrying out
Indication is prepared in the switching that subscriber equipment reception sources base station sends;
Prepare indication in the ferret out base station, space of eating dishes without rice or wine to receive and dispatch user data according to described switching, and carry out synchronously with the target BS that searches;
When satisfying prerequisite, enter HO-break duration and carry out the switching of eating dishes without rice or wine.
The above-mentioned storage medium of mentioning can be a read-only memory, disk or CD etc.
More than a kind of air interface converting method provided by the present invention and data transmission method and communication system and relevant device are described in detail, for one of ordinary skill in the art, thought according to the embodiment of the invention, part in specific embodiments and applications all can change, in sum, this description should not be construed as limitation of the present invention.
Claims (14)
1. an air interface converting method is characterized in that, comprising:
Indication is prepared in the switching that subscriber equipment reception sources base station sends;
Prepare indication in the ferret out base station, space of eating dishes without rice or wine to receive and dispatch user data according to described switching, and carry out synchronously with the target BS that searches;
When satisfying prerequisite, enter HO-break duration and carry out the switching of eating dishes without rice or wine.
2. method according to claim 1 is characterized in that, the step that indication is prepared in the switching that described subscriber equipment reception sources base station sends comprises:
When needs eated dishes without rice or wine to switch, source base station sent to subscriber equipment and switches synchronization message, comprises the carrier frequency information and the frequency point information of target BS in the described switching synchronization message.
3. method according to claim 2 is characterized in that, described and target BS that search carries out comprising after the synchronous step:
Subscriber equipment sends to source base station and switches confirmation of synchronization message.
4. method according to claim 3 is characterized in that, judges whether that the step that satisfies described prerequisite comprises:
Subscriber equipment judges whether to receive the switching execution message that source base station sends, if receive, then determines to satisfy described prerequisite, and it is to send to subscriber equipment after source base station receives switching confirmation of synchronization message that message is carried out in described switching.
5. method according to claim 1 is characterized in that, the step that indication is prepared in the switching that described subscriber equipment reception sources base station sends comprises:
When needs eated dishes without rice or wine to switch, source base station sent to switch synchronization message and start timer to subscriber equipment and picks up counting, and comprises the carrier frequency information and the frequency point information of target BS in the described switching synchronization message.
6. method according to claim 5 is characterized in that, described source base station comprises after subscriber equipment sends the step of switching synchronization message:
Source base station judges whether described timer reaches default value, if reach, then sends to switch to subscriber equipment and carries out message.
7. method according to claim 6 is characterized in that, judges whether that the step that satisfies described prerequisite comprises:
Subscriber equipment judges whether to receive the switching execution message that source base station sends, if receive, then determines to satisfy described prerequisite.
8. method according to claim 1 is characterized in that, the step that indication is prepared in the switching that described subscriber equipment reception sources base station sends comprises:
When needs eated dishes without rice or wine to switch, source base station sends to switch to subscriber equipment carried out message, and described switching is carried out in the message and comprised the execution time information, carrier frequency information and frequency point information.
9. method according to claim 8 is characterized in that, judges whether that the step that satisfies described prerequisite comprises:
Subscriber equipment judges whether the system clock current time reaches described execution time information moment corresponding, if reach, then determines to satisfy described prerequisite.
10. according to the described method of claim 2,5 or 8, it is characterized in that, describedly prepare indication in the ferret out base station, space of eating dishes without rice or wine to receive and dispatch user data, and carry out synchronous step with the target BS that searches and comprise according to described switching:
Carrier frequency information that the subscriber equipment basis receives and frequency point information are at the corresponding target BS of space search of eating dishes without rice or wine to receive and dispatch user data;
Undertaken synchronously by common signal channel and the described target BS that searches that presets.
11. method according to claim 10 is characterized in that, the step that indication is prepared in the switching that described subscriber equipment reception sources base station sends comprises before:
Source base station sends handoff request message to target BS;
The switching request acknowledgement message of source base station receiving target base station feedback;
Source base station sends downlink bearing link switchover message to mobile management entity, and described downlink bearing link switchover message is used for by described mobile management entity indicating service gateway downlink data being sent to target BS;
Source base station is remaining downlink data in subscriber equipment transmission self buffer memory.
12. a subscriber equipment is characterized in that, comprising:
The indication receiving element is used for the switching preparation indication that the reception sources base station sends;
The search lock unit is used for preparing indication in the ferret out base station, space of eating dishes without rice or wine to receive and dispatch user data according to described switching, and carries out synchronously with the target BS that searches;
The switch unit of eating dishes without rice or wine is used for when satisfying prerequisite, enters HO-break duration and carries out and eat dishes without rice or wine to switch.
13. subscriber equipment according to claim 12 is characterized in that, described subscriber equipment also comprises:
The handover trigger unit is used to judge whether to satisfy prerequisite, if satisfy, then triggers the described switch unit of eating dishes without rice or wine and carries out the switching of eating dishes without rice or wine.
14. subscriber equipment according to claim 13 is characterized in that, described handover trigger unit comprises at least one in the following unit:
First trigger element is used to judge whether to receive the switching execution message that source base station sends, if receive, then determines to satisfy prerequisite;
Second trigger element is used for judging whether the system clock current time reaches described switching and prepare the execution time information moment corresponding that indication comprises, if reach, then determines to satisfy prerequisite.
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| CN104170461B (en) * | 2014-04-02 | 2018-10-19 | 华为技术有限公司 | Data transmission method and base station |
| CN105677254B (en) * | 2016-01-06 | 2019-10-25 | 深圳市紫光同创电子有限公司 | A kind of data processing method and device |
| EP3496458A4 (en) * | 2016-08-12 | 2019-07-03 | Huawei Technologies Co., Ltd. | Data processing method and relevant device |
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