CN101588607B - Data retransmission method, wireless entity and base station in switching process - Google Patents
Data retransmission method, wireless entity and base station in switching process Download PDFInfo
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Abstract
Embodiment of the invention discloses a data retransmission method, s wireless entity and a base station in switching process, wherein the method includes: a second wireless entity receives a request of data transmission from a first wireless entity, or the second wireless entity receives a notice of data transmission from data buffer control unit, the second wireless entity reads data from a common transmission data buffer pool of the first wireless entity and the second wireless entity, and the obtained data is transmitted to service base station of the second wireless entity. A back-up wireless entity can replace wireless entity to receive data when the wireless entity switches by application of the invention disclosed method, wireless entity and base station, which can reduce data lossin swithcing process, and reduce time delay of receiving or sending data in wireless entity switching process, and reduce affects to business performance brought by the switching process.
Description
Technical field
The invention belongs to communication technical field, relate in particular to method, wireless entity and the base station of transmitting data in a kind of handoff procedure.
Background technology
In GSM, the terminal of high-speed motion need frequently be switched between different base stations.For TDD (Time Division Duplex; Time division duplex) communication system and OFDM (orthogonalfrequency division multiple access; OFDM) communication system; Usually all be the mode of taking direct-cut operation in the prior art, for example, diminish direct-cut operation or harmless direct-cut operation.Diminish direct-cut operation and be meant and lose the data of originally not having sent in the handoff procedure, begin to transmit new data after switching to target BS, the terminal is professional in diminishing direct-cut operation understands interruption a period of time, and can cause a large number of services loss of data.Harmless direct-cut operation then is to diminish a kind of switching mode of more optimizing on the basis of direct-cut operation; Harmless direct-cut operation is meant in the process that switch at the terminal; Pass to new serving BS being trapped in the data that belong to this terminal in the former serving BS earlier; After terminal and new serving BS connect, send this part data to terminal through new serving BS again.Though mode through harmless direct-cut operation has solved the terminal causes a large number of services loss of data in handoff procedure problem to a great extent, this mode still can cause bigger time delay.
Summary of the invention
The embodiment of the invention provides in a kind of handoff procedure the scheme of transmitting data, can prevent losing of data in the handoff procedure through this scheme, and the time delay that can reduce to receive data in the wireless entity handoff procedure or send data.
The embodiment of the invention provides the method for transmitting data in a kind of handoff procedure, and this method may further comprise the steps:
Second wireless entity receive from after the data forwarding request of first wireless entity or second wireless entity receive from after the data forwarding of the data buffering control unit notice; Said second wireless entity is reading of data from the common transmission data buffering pond of first wireless entity and second wireless entity in order, and the said data that read are sent to the serving BS of said second wireless entity.
Embodiments of the invention also provide the method for transmitting data in the another kind of handoff procedure, and this method may further comprise the steps:
After the handoff request message from first wireless entity is received in first base station, obtain the backup wireless entity relevant information of said first wireless entity;
If the backup wireless entity of said first wireless entity is second wireless entity; And the serving BS of second wireless entity is first base station; Then first base station sends to second wireless entity with the downlink data that belongs to said first wireless entity in the buffering area, stores said downlink data into said first wireless entity and the common reception data buffering pond of second wireless entity by said second wireless entity;
If the backup wireless entity of said first wireless entity is second wireless entity; And the serving BS of second wireless entity is second base station; Then first base station is transmitted to said second base station with the downlink data that belongs to said first wireless entity in the buffering area; The downlink data that will belong to said first wireless entity through said second base station sends to second wireless entity, stores said downlink data into said first wireless entity and the common reception data buffering pond of second wireless entity by said second wireless entity.
In addition, embodiments of the invention also provide a kind of wireless entity, and this wireless entity comprises:
Receiving element, be used for another wireless entity break off with being connected of its serving BS after, receive from the data forwarding request of said another wireless entity or receive and notify from the data forwarding of data buffering control unit;
Transmitting element; After being used for said receiving element and receiving data forwarding request or data forwarding notice; Reading of data in order from the common transmission data buffering pond of said another wireless entity and said wireless entity, and the said data that read are sent to the serving BS of said wireless entity.
The embodiment of the invention also provides other a kind of wireless entity, and this wireless entity comprises:
Receiving element, be used for another wireless entity break off with being connected of its serving BS after, receive the downlink data that belongs to said another wireless entity that the serving BS of said wireless entity issues;
Memory cell is used for the downlink data that belongs to another wireless entity that receiving element is received is stored into and said another wireless entity and the common reception data buffering pond of said wireless entity.
The embodiment of the invention also provides a kind of base station, and this base station comprises:
Receiving element is used to receive the handoff request message from first wireless entity;
Information acquisition unit after being used for receiving element and receiving the handoff request message from first wireless entity, is obtained the backup wireless entity relevant information of said first wireless entity;
Transmitting element; The backup wireless entity that is used for when said first wireless entity is second wireless entity; And when the serving BS of the serving BS of second wireless entity and first wireless entity is identical; The downlink data that belongs to said first wireless entity in the buffering area is sent to second wireless entity, store said downlink data into said first wireless entity and the common reception data buffering pond of second wireless entity by said second wireless entity;
Said transmitting element also is used for; When the backup wireless entity of said first wireless entity is second wireless entity; And the serving BS of the serving BS of second wireless entity and second wireless entity is not simultaneously; The downlink data that belongs to said first wireless entity in the buffering area is transmitted to the serving BS of said second wireless entity; The downlink data that serving BS through said second wireless entity will belong to said first wireless entity sends to second wireless entity, stores said downlink data into said first wireless entity and the common reception data buffering pond of second wireless entity by said second wireless entity.
Transmit the scheme of data in the handoff procedure that provides through the invention described above embodiment; Can realize when first wireless entity switches; By its backup wireless entity is that second wireless entity replaces the first wireless entity transceive data; Reduced losing of data in the handoff procedure thus, and reduced first wireless entity receives data or sends data in handoff procedure time delay, reduced and switched the influence that service feature is brought.
Description of drawings
Fig. 1 is the schematic flow sheet of the inventive method embodiment one forwarding uplink data;
Fig. 2 is the schematic flow sheet of the inventive method embodiment two converting downlink data;
Fig. 3 is the structural representation at embodiment of the invention terminal;
Fig. 4 is the schematic flow sheet of the inventive method embodiment three forwarding uplink datas and downlink data;
Fig. 5 is the schematic flow sheet of the inventive method embodiment four forwarding uplink datas and downlink data;
Fig. 6 is the structural representation of a kind of wireless entity of the embodiment of the invention;
Fig. 7 is the structural representation of the another kind of wireless entity of the embodiment of the invention;
Fig. 8 is the structural representation of a kind of base station of the embodiment of the invention.
Embodiment
The embodiment of the invention provides the scheme of transmitting data in a kind of handoff procedure; Be wireless entity the backup wireless entity is set; When wireless entity switches, to take over it and carry out work by the backup wireless entity, this scheme can prevent losing of data in the handoff procedure; And can reduce wireless entity receives data or sends data in handoff procedure time delay, reduce and switched the influence that service feature is brought.
The backup wireless entity of wireless entity 1 can be one; Also can be for a plurality of, because a plurality of situation all be the basis with one, so reader understanding for ease; In an embodiment of the present invention, all be to have only one to be that example describes with the backup wireless entity of wireless entity 1.
Referring to shown in Figure 1, in embodiments of the invention one, the backup wireless entity of assumed wireless entity 1 is a wireless entity 2, and the serving BS of wireless entity 1 is BS1, and the serving BS of wireless entity 2 can be BS1, also can be for other base stations, like BS2.Before the method for embodiment of the present invention embodiment one, need common reception data buffering pond to be set and to send the data buffering pond for wireless entity 1 and wireless entity 2 in advance.The embodiment of the invention one wireless entity 1 comprises through the method for wireless entity 2 forwarding uplink datas in handoff procedure:
Step 101: wireless entity 2 receives the data forwarding request of wireless entity 1 transmission or the data forwarding notification message of data buffering control unit.
In step 101,, tell data buffering control unit wireless entity 1 switching if the data forwarding notification message that the data buffering control unit sends then before this, when wireless entity 1 switches, needs to send a notification message.
Step 102: wireless entity 2 is reading of data from the common transmission data buffering pond of wireless entity 1 and wireless entity 2 in order, and the said data that read are sent to the serving BS of said wireless entity 2.
Wireless entity 2 is behind the data forwarding notification message of data forwarding request of receiving wireless entity 1 transmission or data buffering control unit in step 102; Can adjust the speed of wireless entity 2 reading of data from the common transmission data buffering pond of wireless entity 1 and wireless entity 2, the speed after putting in order is more than or equal to the speed of original wireless entity 2 reading of data from said transmission data buffering pond.
The data of storing in the above-mentioned transmission data buffering pond are the data from the upper-layer protocol entity; Because before wireless entity 1 switches; Wireless entity 1 is worked with wireless entity 2 simultaneously, and wireless entity 1 and wireless entity 2 can alternately be fetched data from send the data buffering pond and sent to network side and handle.And in wireless entity 2 switches process, have only wireless entity 2 to work, wireless entity 2 needs from send the data buffering pond, fetch data in order to send to the serving BS of wireless entity 2 at this moment.
Above-mentioned before wireless entity 1 is switched, the mode of wireless entity 1 and wireless entity 2 alternations can be provided with according to actual conditions flexibly.For example; Can set a timer, wireless entity 1 or wireless entity 2 were whenever got a secondary data at a distance from 5 seconds from send the data buffering pond, fetched data from send the data buffering pond by wireless entity 1 second at 1-5; 6-10 is fetched data from send the data buffering pond by wireless entity 2 second; 11-15 is fetched data from send the data buffering pond by wireless entity 1 again second ..., the rest may be inferred in the back.Certainly; If it is different that the Radio Resource of distributing to wireless entity 1 when distributing to the Radio Resource of wireless entity 2, can be provided with the duration that two wireless entity fetch data, for example; 1-6 is fetched data from send the data buffering pond by wireless entity 1 second; 7-10 is fetched data from send the data buffering pond by wireless entity 2 second, and 11-16 is fetched data from send the data buffering pond by wireless entity 1 second, and 17-20 is fetched data from send the data buffering pond by wireless entity 2 again second; ..., the rest may be inferred in the back.Above-mentioned situation just illustrates, and when actual the setting, the technical staff can apply in a flexible way in view of the above, is not limited thereto.
The method of the embodiment of the invention one may further include: after wireless entity 1 was switched completion, wireless entity 1 or base station can be sent message and given wireless entity 2, recovered the mode of alternation.
Wireless entity 1 method through wireless entity 2 forwarding uplink datas in handoff procedure has been introduced in above-mentioned enforcement one, will introduce the method for converting downlink data through other embodiment below.
Referring to shown in Figure 2, be the embodiment of the invention two wireless entity 1 method through wireless entity 2 converting downlink data in handoff procedure, this method comprises:
Step 201: the serving BS BS1 of wireless entity 1 is after receiving the handoff request message of wireless entity 1; Obtain the backup wireless entity relevant information of said wireless entity; If the backup wireless entity of wireless entity 1 is a wireless entity 2; And the serving BS of wireless entity 2 is BS1, and then execution in step 202; If the backup wireless entity of wireless entity 1 is a wireless entity 2, and the serving BS of wireless entity 2 is BS2, and then execution in step 203.
In the above-mentioned steps 201, the backup wireless entity information of wireless entity 1 can be stored among the BS1, also can be stored in other entities.Receive the handoff request message of wireless entity 1 as BS1 after; Can carry out alternately according to the information of BS1 storage inside or through entity, obtain the backup wireless entity relevant information of said wireless entity 1 with the backup wireless entity relevant information that stores wireless entity 1.Backup wireless entity relevant information comprises the serving BS information of backup wireless entity information and this backup wireless entity at least.
The backup wireless entity of above-mentioned wireless entity 1 can be for one or more; Preserve wireless entity 1 and backup wireless entity mapping table in the serving BS of wireless entity 1; When wireless entity 1 switched, the serving BS of wireless entity 1 can be that wireless entity 1 is selected a backup wireless entity according to above-mentioned mapping table and preset priority.
Step 202:BS1 sends to wireless entity 2 with the downlink data that belongs to wireless entity 1 in the buffering area;
Step 203:BS1 is transmitted to BS2 with the downlink data that belongs to wireless entity 1 in the buffering area, and the downlink data that will be belonged to wireless entity 1 by BS2 sends to wireless entity 2;
Step 204: wireless entity 2 stores the above-mentioned downlink data of receiving that belongs to wireless entity 1 in the common reception data buffering pond of wireless entity 1 and wireless entity 2.
Alternatively, embodiments of the invention two may further include:
Step 205: the upper-layer protocol entity is from the common reception data buffering pond reading of data of wireless entity 1 and wireless entity 2.
Above-mentioned upper-layer protocol entity need not be concerned about which entity is the data in the common reception data buffering pond come from; As long as the common data of storing in the data buffering pond that receive have sequence number, then the upper-layer protocol entity calls over these data after can arranging again said sequence number.For example; BS1 is with SDU (Service Data Unit; Service Data Unit) being least unit sends data to wireless entity 1 or wireless entity 2, and wireless entity 1 or wireless entity 2 store in their the common reception data buffering pond after receiving data, and the upper-layer protocol entity is from common reception data buffering pond during reading of data; Still be that least unit sorts to these data again, then can correctly read these data with SDU.
Above-mentioned upper-layer protocol can be TCP (Transfer Control Protocol), UDP (UserDatagram Protocol) etc.
The method that provides through the invention described above embodiment; Wireless entity 1 can back up wireless entity through it in handoff procedure be that wireless entity 2 replaces this wireless entity 1 to receive or send data; Prevent losing of data in the handoff procedure thus, and can reduce wireless entity 1 receives data or sends data in handoff procedure time delay.
For making scheme of the present invention clearer, will detail method of the present invention through more concrete embodiment below.
Above-mentioned wireless entity and backup wireless entity thereof can be integrated in the terminal, for example, referring to shown in Figure 3, are the integrated situation of N wireless entity in the terminal, and wherein, N is greater than 1.Can be used for communicating for this N wireless entity disposes wireless far-pulling module respectively with the base station.
Describing for ease, is that example describes with the situation that comprises two wireless entity in the terminal only in the embodiments of the invention.For example comprise wireless entity 1 and wireless entity 2 in the terminal; Wireless entity 1 all was operated under the base station 1 (BS1) before switching with wireless entity 2, and wireless entity 1 and wireless entity 2 are in moving process, and wireless entity 1 switches earlier; Then referring to shown in Figure 4, the method for the embodiment of the invention three is following:
Step 401: wireless entity 1 is sent handoff request message to BS1;
After step 402:BS1 receives the handoff request message from wireless entity 1, confirm that wireless entity 1 need switch to target BS BS2, and the backup wireless entity that finds wireless entity 1 is wireless entity 2, wireless entity 2 works at present are base station BS 1 time.
After above-mentioned BS1 receives the handoff request message from wireless entity 1, confirm that through carrying out information interaction wireless entity 1 need switch to target BS BS2 with wireless entity 1; BS1 carries out alternately according to the backup wireless entity relevant information of the wireless entity 1 of its inside preservation or through the entity with the backup wireless entity relevant information that stores wireless entity 1; The backup wireless entity that finds wireless entity 1 is a wireless entity 2, and knows that wireless entity 2 works at present are base station BS 1 time.
Step 403:BS1 sends handoff request message to BS2, and switching has taken place the above-mentioned wireless entity 1 of notice BS2.
Step 404:BS2 returns switching response message to BS1.
Step 405:BS1 sends switching response message to wireless entity 1, and indication wireless entity 1 can switch to BS2 in this switching response message; And BS1 notice GW (GateWay, gateway) stops to issue to BS1 the data of wireless entity 1, and follow-up downlink data with wireless entity 1 sends to BS2.
Step 406: wireless entity 1 is sent handoff notification message to BS1, and this handoff notification message is used to notify BS1, and wireless entity 1 disconnection soon is connected with BS1's, switches to BS2.
Above-mentioned is that wireless entity 1 is initiated the flow process switched, when wireless entity 1 is broken off with after the connection of BS1, realizes through following flow process for the forwarding of upstream data or downlink data.
(1) processing for upstream data comprises the steps:
Step 407-A: wireless entity 2 is with more than or equal to original speed reading of data from the common transmission data buffering pond of wireless entity 1 and wireless entity 2 in order;
Before step 407-A, can send data after wireless entity 1 switches and transmit notification message to wireless entity 2 or data buffering control unit.If wireless entity 1 sends to wireless entity 2 with the data forwarding notification message, then receive after this message can be with greater than original speed reading of data from send the data buffering pond in order for wireless entity 2; If wireless entity 1 sends to the data buffering control unit with the data forwarding notification message, then the data buffering control unit needs the further speed and the time interval of notice wireless entity 2 adjustment reading of data from common transmission data buffering pond.
Certainly, above-mentioned wireless entity 2 still can be fetched data from send Buffer Pool with original speed and sent to BS 1, but because the data volume that wireless entity 2 is sent at this moment is bigger than original, possibly cause time delay to a certain degree.Therefore, in order to reduce the time delay that data are sent, can suitably increase the speed of wireless entity 2 reading of data from common transmission data buffering pond.Accordingly, BS1 can be that wireless entity 2 is distributed more ascending resource according to the data volume that current wireless entity 2 is transmitted.
Step 408-A: the data that wireless entity 2 will read from common transmission data buffering pond send to the serving BS BS1 of wireless entity 2.
(2) processing for downlink data comprises the steps:
Step 407-B:BS1 sends to wireless entity 2 with the data that belong to wireless entity 1 in the buffering area;
Because after wireless entity 1 is switched; Wireless entity 2 both need receive the data that belong to wireless entity 2 from eating dishes without rice or wine; Also need receive the data of data wireless entity 1; Therefore in above-mentioned steps 407-B, BS1 can distribute more downlink space interface resource for wireless entity 2 according to the data volume that current needs send to wireless entity 2 before the data that transmission belongs to wireless entity 1 are given wireless entity 2.
Step 408-B: wireless entity 2 is with the common reception data buffering pond of the above-mentioned storage of receiving that belongs to wireless entity 1 to wireless entity 1 and wireless entity 2.
Alternatively, said method further comprises:
Step 409-B: the upper-layer protocol entity is reading of data from the common reception data buffering pond of said wireless entity 1 and wireless entity 2.
When if above-mentioned BS1 sends to wireless entity 2 with the data that belong to wireless entity 1 in the buffering area; Downlink space interface resource to wireless entity 2 is adjusted; Then after wireless entity 1 is accomplished switching; Said method may further include: BS1 reduces to distribute to the downlink space interface resource of wireless entity 2 according to the current data volume that sends to wireless entity 2, the value of distributing before the downlink space interface resource that perhaps directly will distribute to wireless entity 2 is adjusted into.
Need to prove that above-mentioned process that downlink data is handled and process that downlink data is handled also can be carried out in no particular order simultaneously.
After switch accomplishing, wireless entity 1 is through the BS2 transceive data, and continuation alternately fetches data from send the data buffering pond with wireless entity 2 and send to serving BS separately, can be not described in detail in this referring to the description of embodiment two about the mode of alternately transmission.
The foregoing description one has been introduced wireless entity 1 and has been worked in the situation same base station under with wireless entity 2, works in the situation of different base station for wireless entity 1 and wireless entity 2, will describe through specific embodiment below.
Be example still to comprise two wireless entity in the terminal; Supposed that before wireless entity 1 switches wireless entity 2 has switched to earlier under the BS2, i.e. wireless entity 1 work at present is under BS1; And wireless entity 2 is operated under the BS2; When then wireless entity 1 switched, referring to shown in Figure 5, the flow process of the embodiment of the invention four was following:
Step 501: wireless entity 1 is sent handoff request message to BS1.
Step 502:BS1 receives the handoff request message from wireless entity 1, confirms that wireless entity 1 need switch to target BS BS2, and the backup wireless entity that finds wireless entity 1 is wireless entity 2, and wireless entity 2 works at present are under BS2.
After above-mentioned BS1 receives the handoff request message from wireless entity 1, confirm that through carrying out information interaction wireless entity 1 need switch to target BS BS2 with wireless entity 1; BS1 carries out alternately according to the backup wireless entity relevant information of the wireless entity 1 of its inside preservation or through the entity with the backup wireless entity relevant information that stores wireless entity 1; The backup wireless entity that finds wireless entity 1 is a wireless entity 2, and knows that wireless entity 2 works at present are under BS2.
Step 503:BS1 sends handoff request message to BS2, and switching has taken place the above-mentioned wireless entity 1 of notice BS2.
Step 504:BS2 returns switching response message to BS1.
Step 505:BS1 sends switching response message to wireless entity 1, and indication wireless entity 1 can switch to BS2 in this switching response message; And BS1 notice GW (GateWay, gateway) stops to issue to BS1 the data of wireless entity 1, and follow-up downlink data with wireless entity 1 sends to BS2.
Step 506: wireless entity 1 is sent handoff notification message to BS1, and this handoff notification message is used to notify BS1, and wireless entity 1 disconnection soon is connected with BS1's, switches to BS2.
Above-mentioned is that wireless entity 1 is initiated the flow process switched, and its step 401～step 406 with embodiment three is similar, when wireless entity 1 break off follow the connection of BS1 after, realize through following flow process for the forwarding of upstream data or downlink data.
(1) processing for upstream data comprises the steps:
Step 507-A: wireless entity 2 is with more than or equal to original speed reading of data from the common transmission data buffering pond of wireless entity 1 and wireless entity 2 in order;
Before step 507-A, can send data after wireless entity 1 switches and transmit notification message to wireless entity 2 or data buffering control unit.If wireless entity 1 sends to wireless entity 2 with the data forwarding notification message, then receive after this message can be with more than or equal to original speed reading of data from send the data buffering pond in order for wireless entity 2; If wireless entity 1 sends to the data buffering control unit with the data forwarding notification message, then the data buffering control unit needs the further speed and the time interval of notice wireless entity 2 adjustment reading of data from common transmission data buffering pond.
Certainly, above-mentioned wireless entity 2 still can be fetched data from send Buffer Pool with original speed and sent to BS 1, but because the data volume that wireless entity 2 is sent at this moment is bigger than original, so possibly cause time delay to a certain degree.Therefore, in order to reduce the time delay that data are sent, can suitably increase the speed of wireless entity 2 reading of data from common transmission data buffering pond.Accordingly, BS1 can distribute more ascending resource for wireless entity 2.
Step 508-A: the data that wireless entity 2 will read from common transmission data buffering pond send to the serving BS BS2 of wireless entity 2.
(2) processing for downlink data comprises the steps:
Step 507-B:BS1 sends to BS2 with the downlink data that belongs to wireless entity 1 that is detained in the BS1 buffering area;
The downlink data that belongs to wireless entity 1 that step 508-B:BS2 will receive sends to wireless entity 2;
Alternatively, above-mentioned BS2 can distribute more downlink space interface resource for wireless entity 2 according to the data volume that current needs send to wireless entity 2 before the data that transmission belongs to wireless entity 1 are given wireless entity 2.
Step 509-B: wireless entity 2 is with the common reception data buffering pond of the above-mentioned storage of receiving that belongs to wireless entity 1 to wireless entity 1 and wireless entity 2.
Said method further comprises:
Step 510-A: the upper-layer protocol entity is reading of data from the common reception data buffering pond of said wireless entity 1 and wireless entity 2.
When if above-mentioned BS2 sends to wireless entity 2 with the data that belong to wireless entity 1 in the buffering area; Downlink space interface resource to wireless entity 2 is adjusted; Then after wireless entity 1 is accomplished switching; Said method may further include: BS2 reduces to distribute to the downlink space interface resource of wireless entity 2 according to the current data volume that sends to wireless entity 2, the value of distributing before the downlink space interface resource that perhaps directly will distribute to wireless entity 2 is adjusted into.
Need to prove that above-mentioned process that downlink data is handled and process that downlink data is handled also can be carried out in no particular order simultaneously.
After switch accomplishing, wireless entity 1 is through the BS2 transceive data, and continuation alternately fetches data from send the data buffering pond with wireless entity 2 and send to serving BS separately, can be not described in detail in this referring to the description of embodiment two about the mode of alternately transmission.
The method that the foregoing description is described can be used for the scene of high-speed mobile such as train, aircraft, rocket or artificial spacecraft; For example; Two wireless entity are installed aboard; Can the data in real time of train be transferred to ground through these two wireless entity and monitor,, then can replace its transceive data by the another one wireless entity if a wireless entity switches in the train moving process; Reduce the time delay that receives data in the wireless entity handoff procedure or send data thus, satisfied the demand of train running data in real time monitoring.
Successively switch for two wireless entity are divided, different switching conditions is set for two wireless entity.This switching condition can be geographical location information; For example; A built-in GPS (Global Positioning System, global positioning system) module respectively in two wireless entity, when the GPS of wireless entity 1 module detect wireless entity 1 in-position 1 (as; City 1 or city 1) time, trigger wireless entity 1 and switch; When the GPS of wireless entity 2 module detect wireless entity 2 in-positions 2 (as, city 2 or city 2) time, trigger wireless entity 2 and switch.Above-mentioned switching condition also can be other wireless parameters, as long as wireless entity 1 and wireless entity were successively switched in 2 minutes.
The method that provides through the invention described above embodiment; Wireless entity can replace this wireless entity to receive or the transmission data through its backup wireless entity in handoff procedure; Reduced losing of data in the handoff procedure thus, and the time delay that can reduce to receive data in the wireless entity handoff procedure or send data.
Except the method that the foregoing description is described, the embodiment of the invention also provides a kind of wireless entity, and referring to shown in Figure 6, this wireless entity comprises:
Receiving element 611 is used to receive the data forwarding notification message that wireless entity 1 or data buffering control unit send;
Transmitting element 612 is used in order from from the common transmission data buffering pond reading of data of wireless entity 1 and said wireless entity 2, and the said data that read are sent to the serving BS of said wireless entity 2;
Said wireless entity can further include:
Adjustment unit 613: be used for adjusting the speed of transmitting element 612 from the common transmission data buffering pond reading of data of wireless entity 1 and wireless entity 2, said adjusted speed can be more than or equal to the said wireless entity speed of reading of data from said transmission data buffering pond originally.
The wireless entity that the invention described above embodiment describes can be the mobile wireless entity.
The embodiment of the invention also provides other a kind of wireless entity, and referring to shown in Figure 7, this wireless entity comprises:
Receiving element 711 is used to receive the downlink data that belongs to wireless entity 1 that serving BS issues;
Transmitting element 712 is used for the downlink data that belongs to wireless entity 1 that receiving element 711 is received is stored into the common reception data buffering pond of wireless entity 1 and wireless entity 2.
Except the wireless entity that the invention described above embodiment provides, the embodiment of the invention also provides a kind of base station, and this base station comprises:
Receiving element 811 is used to receive the handoff request message from wireless entity 1;
Transmitting element 813; The backup wireless entity that is used for when said wireless entity 1 is a wireless entity 2; And when the serving BS of the serving BS of wireless entity 2 and wireless entity 1 is identical; The downlink data that belongs to said wireless entity 1 in the buffering area is sent to wireless entity 2, by said wireless entity 2 with the said storage that belongs to wireless entity 1 to the common reception data buffering pond of wireless entity 1 with wireless entity 2;
Said transmitting element 813 also is used for; When the backup wireless entity of said wireless entity 1 is a wireless entity 2; And the serving BS of the serving BS of wireless entity 2 and wireless entity 2 is not simultaneously; The downlink data that belongs to said wireless entity 1 in the buffering area is transmitted to the serving BS of said wireless entity 2; The downlink data that serving BS through said wireless entity 2 will belong to said wireless entity 1 sends to wireless entity 2, by said wireless entity 2 with the said storage that belongs to wireless entity 1 to the common reception data buffering pond of wireless entity 1 with wireless entity 2.
Through wireless entity or the base station that the invention described above embodiment provides, can reduce losing of data in the handoff procedure, and reduce wireless entity 1 receives data or sends data in handoff procedure time delay, reduced and switched the influence that service feature is brought.
The all or part of step that one of ordinary skill in the art will appreciate that realization said method embodiment, wireless entity or base station execution can instruct relevant hardware to accomplish through program.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. transmit the method for data in the handoff procedure, it is characterized in that said method comprises:
Second wireless entity receive from after the data forwarding request of first wireless entity or second wireless entity receive from after the data forwarding of the data buffering control unit notice; Said second wireless entity is reading of data from the common transmission data buffering pond of first wireless entity and second wireless entity in order, and the said data that read are sent to the serving BS of said second wireless entity;
Wherein, said second wireless entity in order from the common transmission data buffering pond of first wireless entity and second wireless entity reading of data be:
Said second wireless entity is with adjusted speed reading of data from the common transmission data buffering pond of first wireless entity and second wireless entity in order, and said adjusted speed is more than or equal to the speed of original second wireless entity reading of data from said transmission data buffering pond.
2. method according to claim 1 is characterized in that, said method further comprises:
For said first wireless entity and said second wireless entity are provided with a common transmission data buffering pond, be used to store data from the upper-layer protocol entity.
3. transmit the method for data in the handoff procedure, it is characterized in that said method comprises:
After the handoff request message from first wireless entity is received in first base station, obtain the backup wireless entity relevant information of said first wireless entity;
If the backup wireless entity of said first wireless entity is second wireless entity; And the serving BS of second wireless entity is first base station; Then first base station sends to second wireless entity with the downlink data that belongs to said first wireless entity in the buffering area, stores said downlink data into said first wireless entity and the common reception data buffering pond of second wireless entity by said second wireless entity;
If the backup wireless entity of said first wireless entity is second wireless entity; And the serving BS of second wireless entity is second base station; Then first base station is transmitted to said second base station with the downlink data that belongs to said first wireless entity in the buffering area; The downlink data that will belong to said first wireless entity through said second base station sends to second wireless entity, stores said downlink data into said first wireless entity and the common reception data buffering pond of second wireless entity by said second wireless entity.
4. method according to claim 3 is characterized in that, said method further comprises: the upper-layer protocol entity is reading of data from said reception data buffering pond.
5. method according to claim 3; It is characterized in that; Said method further comprises: for said first wireless entity and said second wireless entity are provided with a common reception data buffering pond, be used to store the data that said first wireless entity or said second wireless entity receive from separately serving BS.
6. a wireless entity is characterized in that, said wireless entity comprises:
Receiving element, be used for another wireless entity break off with being connected of its serving BS after, receive from the data forwarding request of said another wireless entity or receive and notify from the data forwarding of data buffering control unit;
Transmitting element; After being used for said receiving element and receiving data forwarding request or data forwarding notice; Reading of data in order from the common transmission data buffering pond of said another wireless entity and said wireless entity, and the said data that read are sent to the serving BS of said wireless entity;
Wherein, said wireless entity further comprises:
Adjustment unit; Be used for adjusting the speed of said transmitting element from the common transmission data buffering pond reading of data of said another wireless entity and said wireless entity, said adjusted speed more than or equal to original from said transmission data buffering pond the speed of reading of data.
7. a base station is characterized in that, said base station comprises:
Receiving element is used to receive the handoff request message from first wireless entity;
Information acquisition unit after being used for receiving element and receiving the handoff request message from first wireless entity, is obtained the backup wireless entity relevant information of said first wireless entity;
Transmitting element; The backup wireless entity that is used for when said first wireless entity is second wireless entity; And when the serving BS of the serving BS of second wireless entity and first wireless entity is identical; The downlink data that belongs to said first wireless entity in the buffering area is sent to second wireless entity, store said downlink data into said first wireless entity and the common reception data buffering pond of second wireless entity by said second wireless entity;
Said transmitting element also is used for; When the backup wireless entity of said first wireless entity is second wireless entity; And the serving BS of the serving BS of second wireless entity and second wireless entity is not simultaneously; The downlink data that belongs to said first wireless entity in the buffering area is transmitted to the serving BS of said second wireless entity; The downlink data that serving BS through said second wireless entity will belong to said first wireless entity sends to second wireless entity, stores said downlink data into said first wireless entity and the common reception data buffering pond of second wireless entity by said second wireless entity.
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| CN2009101078816A CN101588607B (en) | 2009-06-17 | 2009-06-17 | Data retransmission method, wireless entity and base station in switching process |
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| CN2009101078816A CN101588607B (en) | 2009-06-17 | 2009-06-17 | Data retransmission method, wireless entity and base station in switching process |
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| CN101588607B true CN101588607B (en) | 2012-06-27 |
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| CN103118403B (en) * | 2013-01-25 | 2015-07-08 | 北京久华信信息技术有限公司 | Inter-base station seamless handover method for terminal equipment in wireless communication system |
| CN112882651A (en) * | 2021-01-07 | 2021-06-01 | 浙江大华技术股份有限公司 | Data processing method and device and computer readable storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1433606A (en) * | 2000-12-04 | 2003-07-30 | 三菱电机株式会社 | Communication controller and control method thereof |
| EP1826949A1 (en) * | 2006-02-28 | 2007-08-29 | Thomson Licensing | Seamless handover method and system |
| CN101366302A (en) * | 2006-03-28 | 2009-02-11 | 三洋电机株式会社 | Terminal exchanging method and terminal exchanging apparatus using the method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1433606A (en) * | 2000-12-04 | 2003-07-30 | 三菱电机株式会社 | Communication controller and control method thereof |
| EP1826949A1 (en) * | 2006-02-28 | 2007-08-29 | Thomson Licensing | Seamless handover method and system |
| CN101366302A (en) * | 2006-03-28 | 2009-02-11 | 三洋电机株式会社 | Terminal exchanging method and terminal exchanging apparatus using the method |
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