CN102104891B - Method for realizing uplink transmission time maintenance by mobile terminal in third-generation mobile communication system - Google Patents
Method for realizing uplink transmission time maintenance by mobile terminal in third-generation mobile communication system Download PDFInfo
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Abstract
The invention relates to a method for realizing uplink transmission time maintenance by a mobile terminal in a third-generation mobile communication system, which comprises that: the mobile terminal performs quality assessment processing on a current reference cell in a multi-path searching result updating or active set updating process after the removal of an initial reference cell, keeps unchanged the reference cell and a target transmission/receiving time difference parameter if the current reference cell passes the quality assessment, performs the quality assessment processing on other cells in an active set if the current reference cell does not pass the quality assessment, and selects the cell passing the quality assessment to perform updating processing on the reference cell and the target transmission/receiving time difference parameter. By the method for realizing the uplink transmission time maintenance by the mobile terminal in the third-generation mobile communication system, the link quality and mobile continuity of the mobile terminal are ensured, a connected link is stable, the mobile terminal has higher quality of service, stable and reliable working performance and a wide application range, and a solid foundation is laid for the further development of a third-generation mobile communication technology.
Description
Technical field
The present invention relates to moving communicating field, particularly the 3-G (Generation Three mobile communication system) technical field specifically refers to a kind of 3-G (Generation Three mobile communication system) portable terminal up link transmitting time maintaining method.
Background technology
In the 3-G (Generation Three mobile communication system), particularly the WCDMA mobile communication system is to adopt time scheduling to concern to realize the dedicated channel isochronous schedules.The time relationship here refers to time interval of transmitting between the transmission block, and the minimum interval is a frame.The concept of frame is that duration is 10 milliseconds processing unit in the WCDMA system, and a frame is divided into 15 time slots or 38400 chips again.In portable terminal (UE) side, the transmitting time of all special uplink channels can be by determining with the relative time interval of ULDPCCH (special physical controlling channel of upward).Therefore the transmitting time of having determined special physical controlling channel of upward has also just found the foundation of time for all uplink special physical channels.For the setting of initial time, agreement TS 25.133 chapters and sections 7.1.1 regulation is as follows: the transmitting time of up DPCCH/DPDCH (proprietary physical data channel) frame should be after the descending DPCCH/DPDCH frame of reference cell arrives the multipath of UE the earliest T0 constantly.
And the transmitting time of UL DPCCH is basic as calculating according to DL DPCH (downward special physical channel) time.Being used for the corresponding residential quarter of downlink dedicated channels of reference is called reference cell, and Active Set refers to the set of the Radio Link that exists with UE, so reference cell must be the residential quarter that exists in the Active Set.In radio communication, the communication environment complexity between UE and the NodeB (base station), arriving and receiving signal can not be the signal that a paths comes, and always exists many propagation paths between the UE of NodeB and its service.At UE end, determining and adjusting of UL DPCCH transmitting time is that to detect the DL DPCH path time that arrives UE in the reference cell the earliest with UE be benchmark.
See also illustrated in figures 1 and 2ly, UE side UL DPCCH transmitting time determined and adjust that can be divided into two control procedures: transmitting time determines and maintenance process when initially setting up upstream special link-circuit; Keep determining and maintenance process transmitting time under the connection status.
Initially set up uplink special physical channel constantly at UE, only exist a residential quarter in the Active Set this moment, therefore can only select this residential quarter as the reference residential quarter, select interval T 0 after time started that arrives DL DPCH frame in the UE path the earliest of detected link constantly as the UL DPCCH frame zero-time of up transmission.Agreement TS 25.211 chapters and sections 7.6.3 regulation: T0 is a constant of 1024 chips, at the initialization time phase, the error of the initialization time of UE should that is to say that the time interval of up-downgoing time permission is between T0 ± 1.5 chips within ± 1.5 chips.
Keep connection status to adjust in the maintenance process at UE, when the UE side not in soft changing state following time, generally only have a residential quarter in its Active Set, this is as the unique selection with reference to the residential quarter.In the actual conditions for guarantee mobile in for UE provides continuous, high quality services, UE often gets involved the state of soft handover.The ASSOCIATE STATISTICS data shows that the generation More Soft Handoff that continues of 5%-15% is arranged, and about 20%～40% the generation soft handover that continues.From the UE side, soft handover and More Soft Handoff do not have any difference.The basic principle of soft handover is to keep UE and former NodeB and new NodeB all keeping communication link, have only as network requirement UE and disconnect and the communicating by letter of former NodeB, and after travelling carriage and target NodeB are set up stabilized communication, just can disconnect and the contacting of former NodeB, can effectively improve the reliability of switching like this.In the process of soft handover, UE exists and the contacting of a plurality of residential quarters, and just has a plurality of residential quarters in the corresponding Active Set.Agreement TS 25.133 chapters and sections 7.1.2 are as follows to the processing regulation in the soft handover starting stage: in the soft handover starting stage, though there is new residential quarter to add, but UE does not need to change reference cell as long as original reference cell exists then, and only UE need reselect reference cell when reference cell is released.
No matter have what residential quarters in the Active Set, no matter reference cell has need not be upgraded, and UE will adjust maintenance to up transmitting time in real time.The up transmitting time of UE side is with the down link of reference cell as a reference always.Multiple factors such as the movement of UE, complex environment can cause that all the time that the detected reference cell down link of UE arrives UE changes, and UE should have the ability according to the up transmitting time of this variations adjustment.Under the situation that proprietary link exists, UE needs to monitor and up transmitting time is adjusted maintenance descending always.Adjustment limit for up transmitting time, agreement TS 25.133 chapters and sections 7.1.2 have following regulation: UE should have the ability to adjust along with the change of the descending DPCCH/DPDCH frame time of reception transmitting time of up proprietary frame, in any 800 * d (0≤d≤1/4) millisecond, UE should be in the scope of ± 1/4 chip to the adjustment of up transmitting time.
Two deciding factors that the adjustment of the fine embodiment of existing technical method UE transmitting time is safeguarded: the one, the selection of reference cell, the 2nd, with the time relationship of coherent reference cellular downlink.Existing technical scheme has also provided details such as adjusting range and speed simultaneously.But for after the UE reference cell discharges, how select new reference cell and up-downgoing time to keep what kind of time relationship not have clear and definite regulation as new adjustment transmitting time according to these two key issues in the residue residential quarter.
Summary of the invention
The objective of the invention is to have overcome above-mentioned shortcoming of the prior art, provide a kind of and can carry out effectively that the upstream special link-circuit transmitting time is safeguarded, better kept uplink quality, service quality, stable and reliable working performance, the scope of application with better continuing property and Geng Gao 3-G (Generation Three mobile communication system) portable terminal up link transmitting time maintaining method comparatively widely.
In order to realize above-mentioned purpose, 3-G (Generation Three mobile communication system) portable terminal up link transmitting time maintaining method of the present invention is as follows:
Portable terminal is realized the method that the up link transmitting time is safeguarded in this 3-G (Generation Three mobile communication system), and its main feature is that described method may further comprise the steps:
(1) portable terminal carries out initial wireless link establishment processing;
(2) portable terminal will be set up unique residential quarter that Radio Link connects as the reference residential quarter, and with sending/receiving time difference of systemic presupposition target sending/receiving time difference parameter as this Radio Link;
(3) whether the lasting detection of portable terminal multi-path searching results renewal or activating set updating process take place;
(4) if portable terminal detects and multi-path searching results takes place upgrades, then judge the number of cells in the Active Set of this portable terminal;
(5) if having only a residential quarter in this Active Set, then this residential quarter is reference cell, and keeps this reference cell and target sending/receiving time difference parameter constant, and returns above-mentioned steps (3);
(6) if there are a plurality of residential quarters in this Active Set, then current reference cell carried out quality evaluation and handle;
(7) if current reference cell quality evaluation is passed through, then keep this reference cell and target sending/receiving time difference parameter constant, and return above-mentioned steps (3);
(8) if current reference cell quality evaluation is not passed through, then quality evaluation is carried out in remaining residential quarter in this Active Set and handle;
(9) if the residential quarter that exists quality evaluation to pass through, the residential quarter of then therefrom selecting a quality evaluation to pass through is carried out reference cell and target sending/receiving time difference parameter and is upgraded and handle operation, and returns above-mentioned steps (3);
(10) the if there is no residential quarter passed through of quality evaluation is then kept this reference cell and target sending/receiving time difference parameter constant, and is returned above-mentioned steps (3);
(11) if system detects the activating set updating process taking place, judges then whether current reference cell also is contained in the Active Set of this portable terminal;
(12) if then carry out and keep this reference cell and target sending/receiving time difference parameter constant, and return above-mentioned steps (3);
(13) if not, then judge number of cells in the Active Set of this portable terminal;
(14) if having only a residential quarter in this Active Set, then select this residential quarter to carry out reference cell and target sending/receiving time difference parameter renewal processing operation, and return above-mentioned steps (3);
(15) if there are a plurality of residential quarters in this Active Set, then quality evaluation carried out in the residential quarter in this Active Set and handle;
(16) if the residential quarter that exists quality evaluation to pass through, the residential quarter of then therefrom selecting a quality evaluation to pass through is carried out reference cell and target sending/receiving time difference parameter and is upgraded and handle operation, and returns above-mentioned steps (3);
(17) the if there is no residential quarter passed through of quality evaluation is then selected a residential quarter to carry out reference cell and target sending/receiving time difference parameter arbitrarily and is upgraded and handle operation, and returns above-mentioned steps (3).
Portable terminal is realized current reference cell is carried out quality evaluation handle in the method that the up link transmitting time safeguards in this 3-G (Generation Three mobile communication system), can may further comprise the steps:
(21) if the signal quality of reference cell is good or wherein have the multipath of lock-out state, then return the result that quality evaluation is passed through;
(22) if the poor signal quality of reference cell and wherein do not have the multipath of lock-out state is then returned the result that quality evaluation is not passed through.
Portable terminal is realized current reference cell is carried out quality evaluation handle in the method that the up link transmitting time safeguards in this 3-G (Generation Three mobile communication system), also can may further comprise the steps:
(21 ') are the shortest if the signal of current reference cell arrives the path time of this portable terminal, then return the result that quality evaluation is passed through;
(22 ') then return the result that quality evaluation is not passed through if it is not the shortest that the signal of current reference cell arrives the path time of this portable terminal.
Portable terminal is realized quality evaluation is carried out in remaining residential quarter in the Active Set handle in the method that the up link transmitting time safeguards in this 3-G (Generation Three mobile communication system), can may further comprise the steps:
(31) from this Active Set, take out the residential quarter of non-current reference cell successively;
(32) if the signal quality of this residential quarter is good or wherein have a multipath of lock-out state, then this cell quality assessment by and return above-mentioned steps (31);
(33) if the poor signal quality of this residential quarter and wherein do not have the multipath of lock-out state, then this cell quality assessment is not passed through, and returns above-mentioned steps (31);
(34) if quality evaluation was all carried out in all residential quarters in this Active Set, then return above-mentioned steps (9).
Portable terminal is realized quality evaluation is carried out in remaining residential quarter in the Active Set handle in the method that the up link transmitting time safeguards in this 3-G (Generation Three mobile communication system), also can may further comprise the steps:
(31 ') take out the residential quarter of non-current reference cell successively from this Active Set;
(32 ') are the shortest if the signal of this residential quarter arrives the path time of this portable terminal, and then above-mentioned steps (31 ') is assessed by and returned to this cell quality;
(33 ') if it is not the shortest that the signal of this residential quarter arrives the path time of this portable terminal, then this cell quality assessment is not passed through, and returns above-mentioned steps (31 ');
(34 ') then return above-mentioned steps (9) if quality evaluation was all carried out in all residential quarters in this Active Set.
Selection residential quarter in the method that portable terminal realization up link transmitting time is safeguarded in this 3-G (Generation Three mobile communication system) carries out reference cell and target sending/receiving time difference parameter is upgraded the processing operation, may further comprise the steps:
(41) with selected residential quarter as current reference cell;
(42) arrive the described target sending/receiving time difference parameter of Time Calculation of portable terminal the earliest according to the Radio Link of the current transmitting time position of portable terminal and this reference cell.
Calculating target sending/receiving time difference parameter in the method that portable terminal realization up link transmitting time is safeguarded in this 3-G (Generation Three mobile communication system) is specially:
The current transmitting time position of calculating portable terminal and the interval of the time location of the reference cell Radio Link that arrives this portable terminal the earliest should be at interval as target sending/receiving time difference parameters.
3-G (Generation Three mobile communication system) in the method that portable terminal realization up link transmitting time is safeguarded in this 3-G (Generation Three mobile communication system) is the WCDMA mobile communication system.
Adopted the 3-G (Generation Three mobile communication system) portable terminal up link transmitting time maintaining method of this invention, because portable terminal can be brought in constant renewal in the result of Multipath searching, adjudicate foundation preferably thereby provide, simultaneously because multi-path searching results real-time update always, thereby well guarantee the promptness that reference cell is reselected and corresponding target sending/receiving time difference parameter value obtains, and with this adjustment standard as up transmitting time, thereby guaranteed the continuing property in portable terminal link-quality and the movement better, make that not only the link under the connection status is stable, and make the link reliability in the portable terminal soft switching process be significantly improved, thereby obtained higher service quality, make stable and reliable working performance, the scope of application is comparatively extensive, for further developing of 3G (Third Generation) Moblie technology established solid foundation.
Description of drawings
Fig. 1 is definite method flow diagram of the up DPCCH transmitting time of portable terminal in the prior art.
Fig. 2 is the method for adjustment flow chart of the up DPCCH transmitting time of portable terminal in the prior art.
Fig. 3 is the schematic flow sheet of 3-G (Generation Three mobile communication system) portable terminal up link transmitting time maintaining method of the present invention.
Fig. 4 is many activating set updatings process idle message schematic flow sheet in the embodiment of 3-G (Generation Three mobile communication system) portable terminal up link transmitting time maintaining method of the present invention.
Embodiment
In order more to be expressly understood technology contents of the present invention, describe in detail especially exemplified by following examples.
See also shown in Figure 3, the present invention relates in a kind of WCDMA FDD (Frequency Division Duplexing (FDD)) system mobile terminal side in fact to the maintaining method of up link transmitting time, portable terminal is realized the method that the up link transmitting time is safeguarded in this 3-G (Generation Three mobile communication system), comprising following steps:
(1) portable terminal carries out initial wireless link establishment processing;
(2) portable terminal will be set up unique residential quarter that Radio Link connects as the reference residential quarter, and with sending/receiving time difference of systemic presupposition target sending/receiving time difference parameter as this Radio Link;
(3) whether the lasting detection of portable terminal multi-path searching results renewal or activating set updating process take place;
(4) if portable terminal detects and multi-path searching results takes place upgrades, then judge the number of cells in the Active Set of this portable terminal;
(5) if having only a residential quarter in this Active Set, then this residential quarter is reference cell, and keeps this reference cell and target sending/receiving time difference parameter constant, and returns above-mentioned steps (3);
(6) if there are a plurality of residential quarters in this Active Set, then current reference cell is carried out quality evaluation and handle, can may further comprise the steps:
(a) if the signal quality of reference cell is good or wherein have the multipath of lock-out state, then return the result that quality evaluation is passed through;
(b) if the poor signal quality of reference cell and wherein do not have the multipath of lock-out state is then returned the result that quality evaluation is not passed through;
Also can may further comprise the steps:
(a ') is the shortest if the signal of current reference cell arrives the path time of this portable terminal, then returns the result that quality evaluation is passed through;
(b ') then returns the result that quality evaluation is not passed through if it is not the shortest that the signal of current reference cell arrives the path time of this portable terminal;
(7) if current reference cell quality evaluation is passed through, then keep this reference cell and target sending/receiving time difference parameter constant, and return above-mentioned steps (3);
(8) if current reference cell quality evaluation is not passed through, then quality evaluation is carried out in remaining residential quarter in this Active Set and handles, can may further comprise the steps:
(a) from this Active Set, take out the residential quarter of non-current reference cell successively;
(b) if the signal quality of this residential quarter is good or wherein have a multipath of lock-out state, then this cell quality assessment by and return above-mentioned steps (a);
(c) if the poor signal quality of this residential quarter and wherein do not have the multipath of lock-out state, then this cell quality assessment is not passed through, and returns above-mentioned steps (a);
(d) if quality evaluation was all carried out in all residential quarters in this Active Set, then return above-mentioned steps (9);
Also can may further comprise the steps:
(a ') takes out the residential quarter of non-current reference cell successively from this Active Set;
(b ') is the shortest if the signal of this residential quarter arrives the path time of this portable terminal, and then above-mentioned steps (a ') is assessed by and returned to this cell quality;
(c ') if it is not the shortest that the signal of this residential quarter arrives the path time of this portable terminal, then this cell quality assessment is not passed through, and returns above-mentioned steps (a ');
(d ') then returns above-mentioned steps (9) if quality evaluation was all carried out in all residential quarters in this Active Set;
(9) if the residential quarter that exists quality evaluation to pass through, the residential quarter of then therefrom selecting a quality evaluation to pass through is carried out reference cell and target sending/receiving time difference parameter and is upgraded and handle operation, and returns above-mentioned steps (3); This selection residential quarter carries out reference cell and target sending/receiving time difference parameter is upgraded the processing operation, may further comprise the steps:
(a) with selected residential quarter as current reference cell;
(b) arrive the described target sending/receiving time difference parameter of Time Calculation of portable terminal the earliest according to the Radio Link of the current transmitting time position of portable terminal and this reference cell, be specially:
The current transmitting time position of calculating portable terminal and the interval of the time location of the reference cell Radio Link that arrives this portable terminal the earliest should be at interval as target sending/receiving time difference parameters;
(10) the if there is no residential quarter passed through of quality evaluation is then kept this reference cell and target sending/receiving time difference parameter constant, and is returned above-mentioned steps (3);
(11) if system detects the activating set updating process taking place, judges then whether current reference cell also is contained in the Active Set of this portable terminal;
(12) if then carry out and keep this reference cell and target sending/receiving time difference parameter constant, and return above-mentioned steps (3);
(13) if not, then judge number of cells in the Active Set of this portable terminal;
(14) if having only a residential quarter in this Active Set, then select this residential quarter to carry out reference cell and target sending/receiving time difference parameter renewal processing operation, and return above-mentioned steps (3);
(15) if there are a plurality of residential quarters in this Active Set, then quality evaluation carried out in the residential quarter in this Active Set and handle;
(16) if the residential quarter that exists quality evaluation to pass through, the residential quarter of then therefrom selecting a quality evaluation to pass through is carried out reference cell and target sending/receiving time difference parameter and is upgraded and handle operation, and returns above-mentioned steps (3);
(17) the if there is no residential quarter passed through of quality evaluation is then selected a residential quarter to carry out reference cell and target sending/receiving time difference parameter arbitrarily and is upgraded and handle operation, and returns above-mentioned steps (3).
Simultaneously, described 3-G (Generation Three mobile communication system) is the WCDMA mobile communication system.
In the middle of practical application, for achieving the above object, technical scheme of the present invention may further comprise the steps (seeing also shown in Figure 3):
(1) introduce a new parameter: target sending/receiving time difference parameter (TX_RX_Time_Diff_Target) is as adjusting the foundation that the UE transmitting time is adjusted, just dedicated link exist interval that UE under the situation adjusts above downgoing time in the process of transmitting time with TX_RX_Time_Diff_Target as the adjustment target, the renewal of its value always interrelates with the replacing of reference cell, when each reference cell is changed, UE need recomputate the TX_RX_Time_Diff_Target of new reference cell, its method is the time of advent of multipath the earliest that the current UE transmitting time is deducted current area, but when for the first time setting up proprietary link and connect, the TX_RX_Time_Diff_Target assignment is T0;
(2) initially set up in the process when Radio Link, regulation according to agreement TS 25.211 chapters and sections 8.5.1.2: in the inactive set renewal process, elect residential quarter unique in the Active Set as reference cell, thereby be reference cell with setting up link-attached unique residential quarter this moment, and with the TX_RX_Time_Diff_Target of T0 as current link, step (3) and (9) are as the trigger condition that causes that reference cell is changed and TX_RX_Time_Diff_Target recomputates;
When (3) multi-path searching results upgrades, execution in step (4);
(4) if having only a residential quarter in the Active Set, the value of keeping reference cell and TX_RX_Time_Diff_Target need not to change, if there are a plurality of residential quarters in the Active Set, and execution in step (5);
(5) when having a plurality of residential quarter in the Active Set, will carry out quality evaluation to existing reference cell: if there is the multipath of lock-out state in the reference cell, then need not to change reference cell, execution in step (8), otherwise, execution in step (6);
(6) quality evaluation is carried out in the residue residential quarter in the Active Set, select one of them residential quarter at random, if there is the multipath of lock-out state in this residential quarter, execution in step (7) then, otherwise assess next residential quarter, if there is not the multipath of lock-out state, execution in step (8);
(7) residential quarter of selecting from step 6 is as the reference residential quarter, and arrives the TX_RX_Time_Diff_Target that the Time Calculation of UE makes new advances the earliest according to the Radio Link of current transmitting time position and new reference cell;
(8) keep reference cell and the TX_RX_Time_Diff_Target value is constant;
When (9) the activating set updating process takes place, judge at first whether original reference cell exists, still have then execution in step (8), otherwise execution in step (10);
(10) if had only a residential quarter in the Active Set with this residential quarter as the reference residential quarter, otherwise execution in step (11);
(11) according to proper cell of standard picked at random of step (6) as the reference residential quarter, and arrive the corresponding TX_RX_Time_Diff_Target of Time Calculation of UE the earliest according to the Radio Link of current transmitting time position and new residential quarter, can not find suitable cell and then carry out (12);
(12), all residential quarters choose a residential quarter wantonly if not satisfying appropraite condition as the reference residential quarter.
Above-mentionedly select and the calculation procedure flow process of TX_RX_Time_Diff_Target for reference cell, and the adjustment process of UE transmitting time therewith process be executed in parallel.Compare with the value of TX_RX_Time_Diff_Target in the interval of the propagation path that the transmission control section of UE always constantly arrives according to reference cell the earliest and current transmitting time, thereby judge the direction of adjusting, and be to adjust target with TX_RX_Time_Diff_Target, make corresponding adjustment in the adjustment speed under prior art requires and the scope of adjusting range.
Assessment for cell conditions can be adopted following method, but is not to be confined to following method: can be according to the detection case of the quality of residential quarter and the propagation path criterion as a basis.If the quality of current area is very poor and always detect less than corresponding propagation path, the existing transmission adjusted direction and will be lost the comparison foundation, keeps original reference cell too big value not.
Same said method still can more be improved or revise to adapt to the needs of various situations.When some situations is selected reference cell, can be with the choice criteria of cell signal quality as the reference residential quarter, even can adopt UE to detect the front and back of path time as a kind of standard of selecting.This The Selection of Standard can be determined according to the situation that real system is realized.
UE always brings in constant renewal in the result of Multipath searching, and this provides good judgement foundation to said method.Multi-path searching results is real-time update always, the good like this promptness that guarantees that reference cell is reselected and corresponding TX_RX_Time_Diff_Target value is obtained, and with this adjustment standard as up transmitting time, thereby better guarantee the continuing property in UE link-quality and the movement, make link reliability under the connection status, particularly the link reliability in the UE soft switching process is improved, thereby obtains higher service quality.
In following embodiment of the present invention, the computational process of main description references residential quarter and TX_RX_Time_Diff_Target, consistent with prior art for concrete UE transmitting time method of adjustment, do not specify here.The foundation that the UE time is adjusted changes to some extent, in the example being target to TX_RX_Time_Diff_Target.The selection of main description references residential quarter and the value of TX_RX_Time_Diff_Target in the example.The main process of example can be with reference to the idle message process of figure 4.
Always change the residential quarter in the Active Set in soft switching process, and the process that adopts a plurality of soft handovers is the problem of the change of description references residential quarter and TX_RX_Time_Diff_Target well.Example procedure relates to simultaneously maximum 3 residential quarters and is present in simultaneously in the Active Set and (can has 6 residential quarters simultaneously at most in the regulation Active Set among the agreement TS 25.331, but it is generally acknowledged in the Active Set and can have Pilot Interference above behind 3 residential quarters), be respectively Cell 0, Cell 1 and Cell 2.
In specific implementation process, adopt the signal quality of the detected downstream propagation path of UE as the choice criteria of reference residential quarter, this is the convenience in order to illustrate just, is not to limit the scope of the invention.
The concrete steps process of example is as follows:
(1) UE is initial sets up dedicated link with Cell 0, and residential quarter Cell 0 conduct when select Radio Link just to set up this moment is with reference to the residential quarter, and with T0 as target up-downgoing time difference, TX_RX_Time_Diff_Target=T0.
(2) Active Set adds new residential quarter Cell 1, Cell 2 in the UE moving process, and reference cell Cell 0 does not remove from Active Set.
A, whether Cell 0 is fit to continue to do reference cell assesses, can detect Cell 0 this moment multipath preferably, satisfies as the condition with reference to the residential quarter;
B, maintenance reference cell Cell 0 and constant to the TX_RX_Time_Diff_Target value of correspondence;
C, each multi-path searching results is all carried out above-mentioned process after upgrading in this section process;
(3) new activating set updating process takes place, and network requirement removes reference cell Cell 0 from Active Set, and the necessary gravity treatment of reference cell this moment also exists residential quarter Cell 1 and Cell 2 in the Active Set.
A, Cell 1 is assessed, satisfy the condition of reference cell;
B, selection Cell 1 conduct are with reference to the residential quarter;
C, the time interval of calculating Cell 1 corresponding descending article one dedicated channel in sending the position this moment and storing are as the value of TX_RX_Time_Diff_Target;
(4) in the process that the residential quarter does not change in Active Set, certain has upgraded multi-path searching results constantly.At this moment:
A, to current reference cell Cell 1 assessment, do not satisfy the condition of reference cell;
B, the result that Cell 2 is assessed all do not satisfy as the condition with reference to the residential quarter;
C, the current reference cell Cell 1 of maintenance and TX_RX_Time_Diff_Target value are constant;
(5) in the process that the residential quarter does not change in Active Set, certain carries out the renewal of multi-path searching results constantly.At this moment:
A, to current reference cell Cell 1 assessment, do not satisfied the condition of reference cell;
B, the result that Cell 2 is assessed satisfy as the condition with reference to the residential quarter;
C, reference cell are replaced by Cell 2;
D, calculating send the time interval of position and the detected Cell 2 descending article one dedicated channels of UE this moment, as the value of TX_RX_Time_Diff_Target;
(6) activating set updating removes reference cell Cell 2.
A, this moment have only Cell 1 in Active Set, need not assessment, and selecting Cell 1 is reference cell;
B, calculating UE transmitting time and the time interval that arrives Cell 1 dedicated link of UE the earliest are as new TX_RX_Time_Diff_Target value;
C, in Active Set, have only under the situation of a residential quarter always, do not need to carry out the calculating of new reference cell choice set TX_RX_Time_Diff_Target;
(7) link with Cell 1 discharges, and breaks away from connection state, and UE transmitting time maintenance process finishes; The also corresponding end of renewal computational process of corresponding reference cell selection and TX_RX_Time_Diff_Target.
In the process that Radio Link exists, always constantly repeat above process; It is the execution that the variation of residential quarter in the renewal of periodically multi-path searching results or the Active Set all can cause the reference cell renewal process.
Adopted above-mentioned 3-G (Generation Three mobile communication system) portable terminal up link transmitting time maintaining method, because portable terminal can be brought in constant renewal in the result of Multipath searching, adjudicate foundation preferably thereby provide, simultaneously because multi-path searching results real-time update always, thereby well guarantee the promptness that reference cell is reselected and corresponding target sending/receiving time difference parameter value obtains, and with this adjustment standard as up transmitting time, thereby guaranteed the continuing property in portable terminal link-quality and the movement better, make that not only the link under the connection status is stable, and make the link reliability in the portable terminal soft switching process be significantly improved, thereby obtained higher service quality, make stable and reliable working performance, the scope of application is comparatively extensive, for further developing of 3G (Third Generation) Moblie technology established solid foundation.
In this specification, the present invention is described with reference to its certain embodiments.But, still can make various modifications and conversion obviously and not deviate from the spirit and scope of the present invention.Therefore, specification and accompanying drawing are regarded in an illustrative, rather than a restrictive.
Claims (8)
1. portable terminal is realized the method that the up link transmitting time is safeguarded in the 3-G (Generation Three mobile communication system), it is characterized in that described method may further comprise the steps:
(1) portable terminal carries out initial wireless link establishment processing;
(2) portable terminal will be set up unique residential quarter that Radio Link connects as the reference residential quarter, and with sending/receiving time difference of systemic presupposition target sending/receiving time difference parameter as this Radio Link;
(3) whether the lasting detection of portable terminal multi-path searching results renewal or activating set updating process take place;
(4) if portable terminal detects and multi-path searching results takes place upgrades, then judge the number of cells in the Active Set of this portable terminal;
(5) if having only a residential quarter in this Active Set, then this residential quarter is reference cell, and keeps this reference cell and target sending/receiving time difference parameter constant, and returns above-mentioned steps (3);
(6) if there are a plurality of residential quarters in this Active Set, then current reference cell carried out quality evaluation and handle;
(7) if current reference cell quality evaluation is passed through, then keep this reference cell and target sending/receiving time difference parameter constant, and return above-mentioned steps (3);
(8) if current reference cell quality evaluation is not passed through, then quality evaluation is carried out in remaining residential quarter in this Active Set and handle;
(9) if the residential quarter that exists quality evaluation to pass through, the residential quarter of then therefrom selecting a quality evaluation to pass through is carried out reference cell and target sending/receiving time difference parameter and is upgraded and handle operation, and returns above-mentioned steps (3);
(10) the if there is no residential quarter passed through of quality evaluation is then kept this reference cell and target sending/receiving time difference parameter constant, and is returned above-mentioned steps (3);
(11) if system detects the activating set updating process taking place, judges then whether current reference cell also is contained in the Active Set of this portable terminal;
(12) if then carry out and keep this reference cell and target sending/receiving time difference parameter constant, and return above-mentioned steps (3);
(13) if not, then judge number of cells in the Active Set of this portable terminal;
(14) if having only a residential quarter in this Active Set, then select this residential quarter to carry out reference cell and target sending/receiving time difference parameter renewal processing operation, and return above-mentioned steps (3);
(15) if there are a plurality of residential quarters in this Active Set, then quality evaluation carried out in the residential quarter in this Active Set and handle;
(16) if the residential quarter that exists quality evaluation to pass through, the residential quarter of then therefrom selecting a quality evaluation to pass through is carried out reference cell and target sending/receiving time difference parameter and is upgraded and handle operation, and returns above-mentioned steps (3);
(17) the if there is no residential quarter passed through of quality evaluation is then selected a residential quarter to carry out reference cell and target sending/receiving time difference parameter arbitrarily and is upgraded and handle operation, and returns above-mentioned steps (3).
2. portable terminal is realized the method that the up link transmitting time is safeguarded in the 3-G (Generation Three mobile communication system) according to claim 1, it is characterized in that, describedly current reference cell is carried out quality evaluation handles, and may further comprise the steps:
(21) if the signal quality of reference cell is good or wherein have the multipath of lock-out state, then return the result that quality evaluation is passed through;
(22) if the poor signal quality of reference cell and wherein do not have the multipath of lock-out state is then returned the result that quality evaluation is not passed through.
3. portable terminal is realized the method that the up link transmitting time is safeguarded in the 3-G (Generation Three mobile communication system) according to claim 1, it is characterized in that, describedly current reference cell is carried out quality evaluation handles, and may further comprise the steps:
(21 ') are the shortest if the signal of current reference cell arrives the path time of this portable terminal, then return the result that quality evaluation is passed through;
(22 ') then return the result that quality evaluation is not passed through if it is not the shortest that the signal of current reference cell arrives the path time of this portable terminal.
4. portable terminal is realized the method that the up link transmitting time is safeguarded in the 3-G (Generation Three mobile communication system) according to claim 1, it is characterized in that, describedly quality evaluation is carried out in remaining residential quarter in the Active Set handles, and may further comprise the steps:
(31) from this Active Set, take out the residential quarter of non-current reference cell successively;
(32) if the signal quality of this residential quarter is good or wherein have a multipath of lock-out state, then this cell quality assessment by and return above-mentioned steps (31);
(33) if the poor signal quality of this residential quarter and wherein do not have the multipath of lock-out state, then this cell quality assessment is not passed through, and returns above-mentioned steps (31);
(34) if quality evaluation was all carried out in all residential quarters in this Active Set, then return above-mentioned steps (9).
5. portable terminal is realized the method that the up link transmitting time is safeguarded in the 3-G (Generation Three mobile communication system) according to claim 1, it is characterized in that, describedly quality evaluation is carried out in remaining residential quarter in the Active Set handles, and may further comprise the steps:
(31 ') take out the residential quarter of non-current reference cell successively from this Active Set;
(32 ') are the shortest if the signal of this residential quarter arrives the path time of this portable terminal, and then above-mentioned steps (31 ') is assessed by and returned to this cell quality;
(33 ') if it is not the shortest that the signal of this residential quarter arrives the path time of this portable terminal, then this cell quality assessment is not passed through, and returns above-mentioned steps (31 ');
(34 ') then return above-mentioned steps (9) if quality evaluation was all carried out in all residential quarters in this Active Set.
6. realize the method that the up link transmitting time is safeguarded according to portable terminal in each described 3-G (Generation Three mobile communication system) in the claim 1 to 5, it is characterized in that, described selection residential quarter carries out reference cell and target sending/receiving time difference parameter is upgraded the processing operation, may further comprise the steps:
(41) with selected residential quarter as current reference cell;
(42) arrive the described target sending/receiving time difference parameter of Time Calculation of portable terminal the earliest according to the Radio Link of the current transmitting time position of portable terminal and this reference cell.
7. portable terminal is realized the method that the up link transmitting time is safeguarded in the 3-G (Generation Three mobile communication system) according to claim 6, it is characterized in that described calculating target sending/receiving time difference parameter is specially:
The current transmitting time position of calculating portable terminal and the interval of the time location of the reference cell Radio Link that arrives this portable terminal the earliest should be at interval as target sending/receiving time difference parameters.
8. realize the method that the up link transmitting time is safeguarded according to portable terminal in each described 3-G (Generation Three mobile communication system) in the claim 1 to 5, it is characterized in that described 3-G (Generation Three mobile communication system) is the WCDMA mobile communication system.
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| CN 200910201582 CN102104891B (en) | 2009-12-22 | 2009-12-22 | Method for realizing uplink transmission time maintenance by mobile terminal in third-generation mobile communication system |
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| CN 200910201582 CN102104891B (en) | 2009-12-22 | 2009-12-22 | Method for realizing uplink transmission time maintenance by mobile terminal in third-generation mobile communication system |
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| CN105306164B (en) * | 2014-06-20 | 2019-04-30 | 深圳市中兴微电子技术有限公司 | Up channel sending control method, device and terminal |
| CN107787039B (en) * | 2016-08-29 | 2020-12-15 | 华为技术有限公司 | Uplink transmission method, downlink transmission method, user equipment and base station |
| US10939400B2 (en) * | 2017-12-19 | 2021-03-02 | Qualcomm Incorporated | Time synchronization techniques for wireless communications |
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