CN1708974A - Method and apparatus for detecting a cell reselection - Google Patents
Method and apparatus for detecting a cell reselection Download PDFInfo
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- CN1708974A CN1708974A CN 03801250 CN03801250A CN1708974A CN 1708974 A CN1708974 A CN 1708974A CN 03801250 CN03801250 CN 03801250 CN 03801250 A CN03801250 A CN 03801250A CN 1708974 A CN1708974 A CN 1708974A
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Abstract
A wireless infrastructure (260) includes a source base transceiver station (BTS) (214) that provides communication services to a mobile station (MS) (202), a target BTS (216), a packet control unit (PCU) (230) in communication with the target BTS, and a Serving GPRS Support Node (SGSN) (250) in communication with the PCU. The PCU detects a cell reselection by the MS and initiates a cell reselection procedure in the infrastructure without first receiving a FLUSH LL message from the SGSN based on messages received by the PCU from the MS via the target BTS and a record of the MS maintained by, or in association with, the PCU.
Description
Technical field
The present invention relates generally to cellular communication system, more specifically relate to the sub-district gravity treatment in cellular communication system.
Background technology
GPRS (GPRS) standard provides a compatibility standard for cellular mobile telecommunication system.When the GPRS standard was guaranteed in operating in according to the system of standard manufacture, the mobile radio station (MS) that is operated in gprs system can obtain communication service.For guaranteeing compatibility, standard code radio system parameters and call handling process, comprise the call treatment step that the base station sub-system of MS and service MS is carried out for providing or carry out the sub-district gravity treatment.
Fig. 1 is the block diagram of the exemplary GPRS communication system 100 of prior art.Communication system 100 comprises a plurality of base transceiver station (BTS) 108,110, and each all is connected to a base station controller (BSC) 112, and BSC further is connected to packet control unit (PCU) 114.Gb Interface 114 and the signaling interface of PCU114 through comprising the load path between PCU112 and the GPRS Support Node (SGSN) 116 is connected to Serving GPRS Support Node (SGSN) 116.BTS108 and 110, BSC112, PCU114, and SGSN116 is called the foundation structure of communication system 100 jointly.Communication system 100 further comprises the MS102 that resides in first sub-district and communication service is provided by the BTS108 of this sub-district of service.Usually, between MS102 and service or source BTS108, transmit data on the interface 104 aloft according to Radio Link control (RLC).Air interface 104 comprises at least one Traffic Channel and at least one signaling channel.
When MS102 participates in and during the communication session of external network 118, data are through SGSN116, PCU114, and BSC112 and BTS108 send MS102 to.Data are usually included in the packet according to Internet protocol (IP) standard format.When PCU114 receives the predetermined data that are sent to MS102, the data that the PCU storage receives or abandon data in the PCU in the buffer relevant with MS102 and BTS108.PCU114 transmits packet to MS by the data packets data of retrieve stored from buffer and through BSC112 and source BTS108 then, thereby data are sent to MS102, or request SGSN retransmits the grouping that PCU abandons.
Because MS102 is operated in the communication system 100, MS may experience relevant radio frequency (RF) signal conditioning or the congestion condition deterioration of communication service that offers MS with BTS108.As a result, MS102 may determine to carry out the sub-district gravity treatment.In cell reselection process, the cell-of-origin is abandoned in MS decision, i.e. the sub-district of BTS108 service, and move to adjacent or Target cell, for example sub-district of BTS110 service.In the current realization of gprs system of for example system 100, when MS102 carried out cell reselection process, MS set up and serves the wireless communication link 106 of the BTS110 of Target cell.In case set up communication link 106, MS102 transmits cell update message through target BTS 110 and gives SGSN116.Based on cell update message, SGSN116 detects MS102 and begins the sub-district gravity treatment, and transmits FLUSH_LL message and give PCU114.
Receive FLUSH_LL message, the gravity treatment of PCU114 detected cells begins, and refreshes the PCU buffer relevant with MS102 and BTS108.In addition, response receives FLUSH_LL message, and PCU114 notice BTS108 stops to transmit data and gives MS102, and stops the allocate communications resource to MS102 at BTS.PCU114 also determines to receive FLUSH_LL message by transmitting FLUSH_LL_ACK message to SGSN116.One receives FLUSH_LL_ACK message, SGSN116 just retransmit by SGSN send PCU114 to but not by MS102 receive (that is, being stored in the PCU buffer relevant) with MS102 and BTS108 and according to the deletion of FLUSH_LL message or by PCU114 send MS102 to but any packet of not received by MS to PCU114.SGSN116 is based on the packet that can be determined from the logic link control (LLC) of MS reception by SGSN to retransfer.PCU114 is stored in the packet that retransfers in the buffer relevant with MS102 and BTS110 then, in order to arrive the subsequent transmission of MS102 through BTS110.
In the cell reselection process of being carried out by system 100, after MS102 and target BTS 110 are set up communication link 106, SGSN116 detects MS102 and pass by a period of time before carrying out the sub-district gravity treatment and notifying PCU114, normally 60 milliseconds (ms) is long.Simultaneously, SGSN116 continues the predetermined packet of being sent to MS102 of transmission to PCU114, and the packet that PCU114 continues to receive is stored in the buffer relevant with MS102 and BTS108, and transmits the packet of storing through BTS108 and give MS102.Yet in case set up communication link 106 with BTS110, MS102 stops to monitor the Traffic Channel relevant with BTS108.As a result, after MS had set up communication link 106 with BTS110, MS102 did not receive that PCU114 gives the packet of MS102 through BTS108.These packets must be retransferred to PCU114 by SGSN116, and are stored in the buffer relevant with MS102 and BTS110 by PCU, are retransferred to MS102 through BTS110 by PCU114 then.
The gravity treatment of PCU sub-district detects the result who postpones and has wasted power system capacity and resource.Owing to postpone, SGSN116 must retransfer be sent to PCU114 by SGSN at timing period packet to PCU114, be sent to MS102 through BTS108 then.In addition, at timing period, PCU114 continues to distribute air interface resource to give MS102 at source BTS108, and can not continue to transmit packet through source BTS again after source BTS receives data at MS and give MS102.
Therefore, need a kind of infrastructure device that reduces communication system 100 to detect the method and apparatus of the delay of MS102 sub-district gravity treatment, thereby reduce the number of data packets that need be retransmitted to PCU, and allow after source BTS receives data, can redistribute air interface resource quickly again at source BTS at MS by SGSN.
Description of drawings
Fig. 1 is the block diagram of prior art wireless communication system.
Fig. 2 is the block diagram of wireless communication system according to an embodiment of the invention.
Fig. 3 is according to one embodiment of the invention, the flow chart of the Data transmission of being carried out during the gravity treatment of sub-district by the communication system of Fig. 2 and the step of allocate communications resource.
Fig. 4 is according to a further embodiment of the invention, the flow chart of the Data transmission of being carried out during the gravity treatment of sub-district by the communication system of Fig. 2 and the step of allocate communications resource.
Embodiment
For solving for reducing the demand of wireless infrastructure detection by the method and apparatus of the delay of the sub-district gravity treatment of the mobile radio station (MS) of this foundation structure service, thereby reduce the number of data packets that need be retransmitted to packet control unit (PCU) by Serving GPRS Support Node (SGSN), and allow no longer can be from redistributing the air interface resource of source base transceiver station (BTS) after this BTS receives data sooner at MS, the invention provides a wireless infrastructure, comprise the source BTS of communication service to mobile radio station MS is provided, target BTS, the PCU that communicates by letter with target BTS, and the SGSN that communicates by letter with PCU.PCU detects the sub-district gravity treatment of MS, and the message that receives through target BTS from MS based on PCU and PCU safeguard or the MS relevant with PCU write down cell reselection process the initialization foundation structure, and need not be at first from SGSN reception FLUSH_LL message.
Usually, the embodiment of the invention comprises a kind of method, be used for the detected cells gravity treatment and need not the intervention of the Serving GPRS Support Node (GPRS) of packet data communication system, wherein said packet data communication system comprises source base station subsystem (BSS), target BS S and by the mobile radio station of source BSS service.The method comprising the steps of: the record of safeguarding at least one movable mobile radio station, be received in the request message of target BS S allocation of communication channels from the mobile radio station of at least one movable mobile radio station, and the reception of responding communication channel assignment request is given mobile radio station in target BS S allocation of communication channels.This method further comprises step: the communication channel that the notice mobile radio station distributes, receive the uplink data that comprises the moving station mark symbol relevant from mobile radio station by target BS S with mobile radio station, and, determine that mobile radio station begins the sub-district gravity treatment based on uplink data and with reference to record.
An alternative embodiment of the invention comprises a kind of method, is used for the detected cells gravity treatment and need not the intervention of SGSN in the packet data communication system, and described packet data communication system comprises source BSS, target BS S and by the mobile radio station of source BSS service.The method comprising the steps of: the record of safeguarding at least one movable mobile radio station, be received in the request message of target BS S allocation of communication channels from the mobile radio station of at least one movable mobile radio station, and the reception of responding communication channel assignment request is given mobile radio station in target BS S allocation of communication channels.This method further comprises step: the communication channel that the notice mobile radio station distributes, the countdown of beginning predetermined period of time, and after countdown begins, predetermined period of time then before when source BSS does not receive uplink data, determine that mobile radio station carried out the sub-district gravity treatment.
Another embodiment of the present invention comprises a kind of packet control unit (PCU), and this packet control unit comprises the storage device of safeguarding at least one movable mobile radio station record.This PCU further comprises the processor that can be operationally connected to storage device, be received in the request message of target BS S allocation of communication channels from the mobile radio station of at least one movable mobile radio station, give mobile radio station in target BS S allocation of communication channels, the communication channel that the notice mobile radio station distributes, through target BS S receiving uplink data, and determine that based on uplink data and reference record mobile radio station has begun the sub-district gravity treatment from mobile radio station.
Another embodiment of the present invention comprises a kind of PCU, and this PCU comprises the storage device of safeguarding at least one movable mobile radio station record, a timer, and the processor that can be operationally connected in storage device and the timer each.This processor is received in the request message of target BS S allocation of communication channels from the mobile radio station of at least one movable mobile radio station, give mobile radio station in target BS S allocation of communication channels, beginning is about the countdown of the predetermined period of time of timer, and after countdown begins, predetermined period of time then before packet control unit when source base station subsystem fails to receive uplink data, determine that mobile radio station carried out the sub-district gravity treatment.
To prove absolutely the present invention with reference to figure 2-4.Fig. 2 is the block diagram according to the wireless communication system 200 of the embodiment of the invention.Communication system 200 comprises a plurality of base station sub-systems (BSS) 210,212 (showing two).Each BSS210,212 comprise the BTS214 that can be operationally connected to base station controller (BSC) 220 separately, 216, BSC can be operationally connected to packet control unit (PCU) 230 again.Yet, in another embodiment of the present invention, each BTS214,216 may be connected to PCU230 by separated BSC.Communication system 200 further comprises at least one is provided communication service by source BSS (promptly serving the BSS210 of the resident cell-of-origin of MS) mobile radio station (MS) 202.MS202 and BSS210, particularly BTS214 communicate by letter through the air interface 204 that comprises many communication channels (comprising at least one Traffic Channel and at least one signaling channel).
Each BSC220, PCU230 and SGSN250 comprise processor 222,232,252 separately, can be operationally connected to separately storage device 224,234,254 or and storage device 224,234 separately, 254 are associated.Each processor 222,232,252 comprises one or more microprocessors, microcontroller, digital signal processor (DSP), their combination or similar other devices known to a person of ordinary skill in the art.Each storage device 224,234,254 comprise one or more such as random-access memory (ram), dynamic RAM (DRAM), and/or the storage device of read-only memory (ROM) or their equivalent, be used to store the program that data and respective processor will be carried out.
PCU230 is maintained in the communication system 200 movable in storage device 234 and by the record of each MS of PCU230 service.Preferably, PCU230 is by the record of the independent relevant MS identifier maintenance activity MS of storage and each movable MS.PCU230 further safeguards position record relevant with each store M S identifier, corresponding each movable MS, the position record of preferably serving the BSS of MS in storage device 234.PCU230 further comprises a plurality of PCU data buffers 236,238, corresponding buffer (per_MS buffer) of each MS preferably, and each buffer all is included in the storage device 234, or is connected with processor 232.Each buffer 236,238 with by the single MS (for example MS202) of PCU service and to serve the BSS (being BSS210) of this MS relevant, and storage PCU230 is that receive from SGSN250, the predetermined packet of being sent to the MS that is correlated with through relevant BSS.
SGSN250 further comprises at least one SGSN data buffer 256.SGSN data buffer 256 can reside in the SGSN storage device 254 or be positioned at other places of SGSN250, and communicates by letter with processor 252.SGSN data buffer 256 is the per_MS buffer of corresponding each MS preferably, with relevant by the single MS (for example MS202) of SGSN service, and the storing predetermined packet of being sent to relevant MS.Packet can be from external network 270 to SGSN250, or has not homology, for example operates in the application program in the processor 252 of SGSN250.The source that is stored in the packet in the buffer 256 is not crucial for the present invention.
When MS begins grouping data conversation, MS transfer channel request for allocation, preferably channel request message is given the BSS of this MS of service, i.e. source BSS210.BSS210, particularly BTS214 receive channel request for allocation, and be forwarded to PCU230.Response receives this request, PCU230 distributes BTS214 air interface 204 interior one or more communication channels to give MS, comprise a Traffic Channel, and send up link of BTS214 to and distribute (ULIA) message immediately, notify the communication channel of one or more distribution.BTS214 transmits ULIA message then and gives MS202.Channel request message and ULIA message are being known in the art, and are not described in detail at this.In case receive ULIA message from BSS210, MS202 transmit comprise uplink data (UL data) and the MS identifier (for example TLLI symbol (TLLI)) relevant separately with this MS message to BSS210, this message is transmitted to PCU230 by BSS.
When SGSN250 receives predeterminedly when being sent to the packet of MS202, SGSN is stored in each packet in the formation of the per_MS buffer relevant with MS202, and promptly buffer 256.The data packet transmission that SGSN250 will be stored in the buffer 256 is then given source BSS210, especially is transferred to PCU230.When PCU230 received packet from the predetermined MS202 of being sent to of SGSN250, PCU230 was stored in packet in the formation of the per_MS buffer 236 relevant with MS202 and BSS210.The packets that PCU230 will be stored in the buffer 236 then send MS202 to through BTS214, and interface 204 distribution service channels aloft.
When MS202 carried out the sub-district gravity treatment, MS set up and provides the communication link of the target BS S (being BSS212) of communication service and the communication link of termination and source BSS210 for Target cell.In the prior art, provide service to continue to transmit packet to MS, till switch SGSN notice PCU sub-district through source BSS to the PCU of MS.In addition, source BSS continuation allocate communications resource gives MS till SGSN notifies its sub-district gravity treatment.Simultaneously, the MS that carries out the sub-district gravity treatment may stop to monitor the communication link with source BSS, the result cause being transmitted to source BSS, and the packet that is never received by MS must retransfer to target BS S, wasted the communication resource at source BSS.
The intervention of SGSN250 is provided by providing the gravity treatment of MS202 sub-district to detect for foundation structure, particularly PCU230 communication system 200, thereby minimizes the waste of the communication resource and power system capacity.Fig. 3 is according to one embodiment of the invention, the logical flow chart 300 of the step that communication system 200 is carried out in carrying out the sub-district gravity treatment.At this embodiment, among " FLUSH_LL " embodiment, communication system 200 can be supported in the FLUSH_LL between PCU230 and the SGSN250 and the exchange of FLUSH_LL_ACK message.Yet FLUSH_LL embodiment has stipulated the deletion or the transmission of packet of buffer 236 stored of PCU230, and terminates in source BTS214 allocate communications resource and give MS202, need not PCU and receives FLUSH_LL message.
As target BS S, just BSS212, especially BTS216 receive (304) message from MS202, are preferably channel request message, when request is given MS in target BS S allocation of communication channels, and logical flow chart 300 beginnings (302).Target BS S212 sends (306) to PCU230 with message.One receives channel assignment request, and PCU230 especially transmits (308) channel assignment message through BTS216 and gives MS202 through target BS S212.Channel assignment message is preferably up link and distributes (ULIA) message immediately, comprises about at target BS S212 and BTS216, promptly aloft in the interface 206, distributes to the information of the communication channel that comprises a Traffic Channel of MS202.Preferably, unless in this detailed description, the institute of describing with reference to logical flow chart 300 and 400 that is carried out by SGSN250 is all carried out by the processor 252 of SGSN in steps, with reference to logical flow chart 300 and 400 describe by PCU230 carry out in steps all by processor 232 execution of PCU.
One receives channel assignment message from target BS S212, MS202 sends one or more first packets to target BS S212 through air interface 206, target BS S212 receives and sends (310) to PCU230, these packets comprise uplink data (UL data), uplink data (UL data) comprises unique relevant MS identifier with MS, is preferably TLLI symbol (TLLI).Based on being included in the MS identifier in one or more first packets and the transmission of message, and further reference storage device 234, PCU230 determines that (312) MS202 is served by BSS210, and has begun the sub-district gravity treatment.PCU230 deletion (314) is stored in the data in the buffer relevant with MS202 and source BSS210 236, and order BSS210, particularly order BTS214, stop the distribution of one or more communication channels in the air interface 204, promptly terminate in of the distribution of BTS214 place the communication channel of MS202.Preferably, PCU230 is by deletes data packet from buffer, and deletion is in the data of buffer 236 stored.
In addition, response receives the message that comprises uplink data and the MS identifier separately relevant with MS202, and PCU230 transmits (318) through target BS S212 and confirms to MS.Preferably, this is confirmed to be and confirms to receive the packet uplink acknowledgement (PUAK) that is included in from uplink data in the message of MS and MS identifier.In case receive the confirmation from PCU230, MS202 sends target BS S212 to, and target BS S212 receives that (320) are one or more to be comprised uplink data but do not comprise second packet of MS identifier (promptly being included in the TLLI of first packet).Second packet that target BS S212 will receive is transmitted to PCU230, and PCU230 transmits (322) packet and gives SGSN250.Based on second packet that receives from PCU230, SGSN250 determines that (324) MS202 has begun the sub-district gravity treatment, and logic flow finishes (326).
Be stored in packet in the buffer relevant 236 by deletion with MS202 and source BSS210, and the order BTS214 relevant with source BTS210 terminates in BTS214 allocate communications resource to MS202, PCU230 detects the sub-district gravity treatment, and the cell reselection process of beginning in foundation structure 260, and need not at first to receive FLUSH_LL message from SGSN250.Just begin said process by need not at first to receive FLUSH_LL message, PCU230 more early transmits grouped data to target BTS 216 with respect to prior art during the gravity treatment of sub-district, reduced time and the MS202 that MS202 stops to monitor source BTS214 and begun from the delay length between the time of target BTS 216 reception packets.In addition, carry out this process, can need not at first to receive FLUSH_LL message and discharge by PCU230, thereby more early discharge these resources and strengthened the performance of system 200 in the air interface resource of source BTS214 by need not at first to receive FLUSH_LL message.
In another embodiment of the present invention, among " non-FLUSH_LL " embodiment, communication system 200 is not supported FLUSH_LL and FLUSH_LL_ACK message.In non-FLUSH_LL embodiment, PCU230 further comprises timer 240, can be operationally connected to processor 232.Timer 240 then by PCU230 be used to determine whether through target BS S212 will be before the source BSS210 data that send MS to send MS202 to.
Fig. 4 is according to non-FLUSH_LL embodiment of the present invention, at the logical flow chart 400 of the step of being carried out by communication system 200 in Data transmission and allocate communications resource process during the gravity treatment of sub-district.As target BS S, promptly BSS212 receives (404) message from MS202, is preferably channel request message, when the communication channel that request is distributed in target BTS is given MS, and logical flow chart 400 beginnings (402).Target BS S212 sends (406) this message to PCU230.One receives the channel assignment request from MS202, and PCU230 transmits (408) channel assignment message through target BS S212 and gives MS202, is distributed in target BS S, especially gives MS202 in the Traffic Channel of BTS216.PCU230 also starts timer 240, the countdown of beginning (410) predetermined period of time.Channel assignment message is preferably up link and distributes (ULIA) message immediately, comprises about at BTS216, and promptly aloft interface 206 is distributed to the information of the communication channel of MS202, and this communication channel comprises a Traffic Channel.
One receives the channel allocation information from target BS S212, MS202 transmits one or more first packets that comprise uplink data (UL data) through air interface 206 and gives target BS S212, BSS212 receives and sends (412) to PCU230, above-mentioned uplink data packet is drawn together unique relevant MS identifier with MS, is preferably TLLI symbol (TLLI).One receives first packet, and PCU230 transmits (414) through target BS S212 and confirms to give MS202.Preferably, this is confirmed to be final packet uplink acknowledgement (FPUAK), confirms to receive to be included in from uplink data in the message of MS and MS identifier.One receives the affirmation from PCU230, and MS202 transmits one or more second packets that comprise uplink data but do not comprise the MS identifier to target BS S212 through air interface 206, and target BS S212 receives (416) second packets.Second packet that target BS S212 will receive then sends to PCU230, and PCU transmits (418) packet to SGSN250.
In addition, based on the MS identifier of PCU230 through target BS S212 reception, and reference storage device 234, PCU230 determines that (420) MS202 is that this MS is just carrying out the sub-district gravity treatment by the movable MS of source BSS212 service.PCU230 is (422) predetermined period of times of reference timer 240 countdowns then, preferably 5 seconds.Yet those of ordinary skills recognize that the time span that is used for predetermined period of time depends on the designer of system 200, can with cycle At All Other Times as predetermined period of time, and do not deviate from the spirit and scope of the present invention.After timer 240 starts, predetermined period of time then before, PCU230 from MS202 when air interface 204 and source BSS210 receive data, PCU determines (424) MS202 still by source BSS210 service, and continues to transmit (426) packet through source BSS210 and give MS202.
After timer 240 starts, predetermined period of time then before, PCU230 not from MS202 when air interface 204 and source BSS210 receive data, PCU230 determines that (428) MS202 has begun the sub-district gravity treatment.PCU230 deletion (430) is stored in the data in the buffer relevant with MS202 and BSS210 236, and stop (432) in BSS210 and BTS214 allocate communications resource, be that allocation of communication channels is given MS202, that is to say, terminate in air interface 204 allocation of communication channels and give MS.Logic flow 400 finishes (434).Preferably, PCU230 is by deletes data packet from buffer, and deletion is stored in the data in the buffer 236.
In a word, PCU230 need not at first to receive FLUSH_LL message from SGSN250 and just can detect MS202 and begin the sub-district gravity treatment.In one embodiment of the invention, PCU230 is based on coming the detected cells gravity treatment from MS202 by the message of target BS S212 reception and the record of PCU movable MS that safeguard or relevant with PCU.In another embodiment of the present invention, PCU230 based on PCU not from the time cycle of MS during source BSS210 receives further message then, come the detected cells gravity treatment.Begin the sub-district gravity treatment by detecting MS202, and need not at first to receive FLUSH_LL message and begin cell reselection process in foundation structure 260, PCU230 can delete the packet that is stored in the buffer relevant with MS202 and source BSS210 236, the source BTS214 of being released in distributes to the communication resource of MS202, and during the gravity treatment of sub-district, more early will be scheduled to be sent to the data packet transmission of MS202 to target BTS 216 with respect to prior art.
Though the present invention shows in detail and explanation that with reference to specific embodiment those skilled in the art should understand, differently change and replace its assembly and do not deviate from the scope of the present invention that in claims, proposes with equivalent can make.Correspondingly, specification and accompanying drawing should be considered to illustrate character for example, but not limited significance, expect all these variations and replace all to comprise within the scope of the present invention.
The above solution of having described benefit, other advantages and problem with reference to specific embodiment.Yet, benefit, advantage, issue-resolution and can cause any benefit, advantage or solution take place or make it key that more significant any assembly should not be interpreted as all authority requirement, must or necessary feature or assembly.As used herein, term " comprises ", " comprising " (comprises, comprising) or its any variation intention contain comprising of nonexclusion, therefore, the program, method, article or the equipment that comprise a series of assemblies not only comprise those listed assemblies, also comprise the assembly that other are not clearly listed or these programs, method, article or equipment are inherent intrinsic.
Claims (13)
1. one kind is used for comprising source base station subsystem (BSS), target BS S and by the packet data communication system of the mobile radio station of source BSS service, need not that Serving GPRS Support Node (SGSN) is intervened and the method for detected cells gravity treatment comprises step:
Safeguard the record of at least one movable mobile radio station;
Receive the message of request from the mobile radio station of described at least one movable mobile radio station in target BS S allocation of communication channels;
In response to receiving the traffic channel assignment request, give mobile radio station in target BS S allocation of communication channels;
The communication channel of distributing is notified to mobile radio station;
Target BS S receives the uplink data that comprises the moving station mark symbol relevant with mobile radio station from mobile radio station; With
Based on uplink data and reference record, determine that mobile radio station begins the sub-district gravity treatment.
2. the method for claim 1 further comprises step: in case determine that mobile radio station begins the sub-district gravity treatment, just delete the data that are stored in the buffer relevant with mobile radio station and source base station subsystem.
3. the method for claim 1, wherein described uplink data packet is drawn together first uplink data, and described method further comprises step:
Receive second uplink data from mobile radio station, wherein, described second uplink data does not comprise the moving station mark symbol that comprises in first uplink data; With
Second uplink data is sent to Serving GPRS Support Node.
4. method as claimed in claim 3 further comprises step: based on second uplink data, determine that by Serving GPRS Support Node mobile radio station begins the sub-district gravity treatment.
5. one kind is used for comprising source base station subsystem (BSS), in target BS S and the packet data communication system by the mobile radio station of source BSS service, need not that Serving GPRS Support Node (SGSN) is intervened and the method for detected cells gravity treatment comprises step:
Safeguard the record of at least one movable mobile radio station;
Receive the message of request from the mobile radio station of described at least one movable mobile radio station in target BS S allocation of communication channels;
In response to receiving the traffic channel assignment request, give mobile radio station in target BS S allocation of communication channels;
The communication channel of distributing is notified to mobile radio station;
The countdown of beginning predetermined period of time; With
When after countdown begins, predetermined period of time then before, when source BSS does not receive uplink data, determine that then mobile radio station carries out the sub-district gravity treatment.
6. method as claimed in claim 5 further comprises step: when after countdown begins, predetermined period of time then before, when source base station subsystem receives uplink data, determine that then mobile radio station is still by the source base station subsystem service.
7. method as claimed in claim 5 further comprises step: when after countdown begins, predetermined period of time then before, when source BSS does not receive uplink data, deleted data from the buffer relevant then with mobile radio station and source BSS.
8. packet control unit comprises:
Storage device is safeguarded the record of at least one movable mobile radio station; With
Processor, can be operationally connected to storage device, receive the message of request from the mobile radio station of at least one movable mobile radio station in subsystem of objective base station (BSS) allocation of communication channels, give mobile radio station in target BS S allocation of communication channels, the communication channel of distributing is notified to mobile radio station, through target BS S receiving uplink data, determine that based on uplink data and reference record mobile radio station begins the sub-district gravity treatment from mobile radio station.
9. packet control unit as claimed in claim 8, further comprise the buffer that can be operationally connected to processor, wherein, described buffer is relevant with mobile radio station and source base station subsystem, and in case determine that mobile radio station begins the sub-district gravity treatment, processor just deletion is stored in the interior data of described buffer.
10. packet control unit as claimed in claim 9, wherein, the described buffer relevant with mobile radio station and source base station subsystem comprises first buffer, wherein, described processor is by coming deleted data in the described buffer with described transfer of data to second buffer relevant with mobile radio station and subsystem of objective base station.
11. a packet control unit comprises:
Storage device is in order to safeguard the record of at least one movable mobile radio station;
Timer; With
Can be operationally connected in described storage device and the described timer processor of each, receive the message of request in order to mobile radio station in subsystem of objective base station (BSS) allocation of communication channels from least one movable mobile radio station, give mobile radio station in target BS S allocation of communication channels, reference timer begins the countdown of predetermined period of time, after countdown begins, predetermined period of time then before packet control unit when source base station subsystem does not receive uplink data, determine that then mobile radio station carries out the sub-district gravity treatment.
12. packet control unit as claimed in claim 11, wherein, after countdown begins, predetermined period of time then before when source base station subsystem receives uplink data, processor determines that further mobile radio station is still by the source base station subsystem service.
13. packet control unit as claimed in claim 11, wherein, after countdown begins, predetermined period of time then before when source base station subsystem does not receive uplink data, the further deleted data from the buffer relevant of processor then with mobile radio station and source base station subsystem.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US40229902P | 2002-08-09 | 2002-08-09 | |
| US60/402,299 | 2002-08-09 | ||
| US10/626,232 | 2003-07-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1708974A true CN1708974A (en) | 2005-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03801250 Pending CN1708974A (en) | 2002-08-09 | 2003-07-29 | Method and apparatus for detecting a cell reselection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1708974A (en) |
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2003
- 2003-07-29 CN CN 03801250 patent/CN1708974A/en active Pending
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Open date: 20051214 |