CN1941668A - Method for updating radio link parameter based on system performance and channel quality evaluation - Google Patents
Method for updating radio link parameter based on system performance and channel quality evaluation Download PDFInfo
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Abstract
The invention is concerned with a renewed method of wireless link parameter based system capability and channel quality evaluation. A step is carrying initialization dispose to select corresponding threshold value, parameter combination and register to initialize each module according to adjustment arithmetic. B step is evaluating system capability and channel quality of user in periodicity by evaluating device. C step starts clock arbitration device to decide the renewed standard of parameter. When the standard is same as the system capability, it jumps to D step, when it is channel quality, jumps to f step. D step judges whether the system capability exceeds the threshold by evaluating device, when it is over the threshold, the counter starts the renew order. E step counts the renew parameter value according to the system capability and jumps to H step. F step sends parameter renewing order to the counter, when the channel quality is over the threshold. G step counts renewing parameter value according to channel quality. H step sends parameter renewing information of wireless link to parameter renewing module.
Description
Technical field
The present invention relates to a kind of method that is used for mobile communication system based on the radio link parameter update of systematic function and channel quality assessment, particularly be the method for the radio link parameter update of uplink high-speed special physical control channel (HS-DPCCH) in the high speed descending grouping access system (HSDPA).
Background technology
HSDPA comes to provide data service at a high speed for the user by newly-increased down high speed shared data channel (HS-DSCH), down high speed control channel (HS-SCCH) and uplink high-speed special physical control channel (HS-DPCCH).Descending HS-DSCH data channel is used for transmitting all customer data in the sub-district; Descending HS-SCCH control channel is used for transmitting the physical layer signaling that is used to receive data; Up HS-DPCCH control channel is used for transmitting the affirmation information (ACK/NACK) of channel quality feedback information (CQI) and HARQ.
The key technology of using in 3GPP R5 HSDPA standard comprises: adaptive coded modulation (AMC), mix the fast dispatch (Fast Scheduling) of automatic request retransmission (HARQ), base stations control.
1, AMC: this technology allows base station (NodeB) to adjust Modulation and Coding Scheme according to the down channel quality that user (UE) reports, and spreading factor remains unchanged, but channel coding rate can change between 1/4 and 3/4 by punching and the mode that repeats.This technology can guarantee that the user who is near the good user of the channel quality in base station and is in the bad channel quality of cell boarder obtains the speed of maximum possible.
2, HARQ: because the existence of disturbing, link goes wrong unavoidably, in order to retransmit fast, has adopted the mode of physical layer retransmission among the HSDPA, thereby reduces retransmission delay time.Also used the method for incremental redundancy further to improve efficiency of retransmission simultaneously.
3, the packet scheduler of Fast Scheduling:WCDMA is in RNC, and HSDPA packet scheduling device is at NodeB, and maximum benefit is a propagation delay time of having avoided Iub interface, and the short frame of 2ms also makes scheduling more flexible simultaneously.Scheduler will be considered user's channel quality, ability, service quality (QoS) grade and the power/code channel resource of terminal when scheduling.
In the HSDPA system, the radio link parameter of up HS-DPCCH channel mainly contains following several:
CQI circulation report cycle, CQI repetition factor, CQI power excursion, ACK/NACK repetition factor, ACK power excursion and NACK power excursion.Be respectively described below:
1.CQI report cycle
Span: 0,2,4,8,10,20,40,80,160 ... unit: millisecond, it is the integral multiple of a Transmission Time Interval (TTI) 2ms.K gets different values and directly affects the precision that CQI reports, and should be that the down channel quality variation is fast more in principle, and the k value just should be more little, can adjust according to the speed to channel variation.Here CQI is not transmitted in 0 representative.
2.CQI repetition factor
Span: natural number (1,2,3,4 ...), no unit, the CQI repetition factor influences the reliability that CQI reports, and unnecessary repeating too much can increase uplink transmission power, thereby increases uplink interference.
Corresponding relation below CQI report cycle and CQI repetition factor exist:
The corresponding relation of table 1:CQI report cycle and CQI repetition factor
| CQI report cycle (ms) | 2 | 4 | 8 | 10 |
| CQI repetition factor maximum | 1 | 2 | 3 | 5 |
3.CQI power excursion
In R5, power excursion span: 5/15 (9.5db), 6/15 (8db), 8/15 (5.5db), 9/15 (4.5db), 12/15 (2db), 15/15 (0db), 19/15 (2db), 24/15 (4db), 30/15 (6db).Power offset values also influences the reliability that CQI reports, and unnecessary too many power excursion can increase uplink transmission power, thereby increases uplink interference.
4.ACK/NACK repetition factor
Span: natural number (1,2,3,4 ...), no unit, the ACK/NACK repetition factor can influence the reliability of ACK/NACK feedback.Unnecessary too many feedback can increase uplink transmission power, disturbs thereby increase.When increasing repetition factor simultaneously, the user can not receive data ACK/NACK being repeated to transmit pairing HS-PDSCH the time of reception, this user of scheduling that just NODEB can not be continuous, the chance that can cause the user to be scheduled reduces at double like this, causes the user to lose certain flow.
The flow loss situation depends on that minimum TTI is at interval (such as some low end subscribers, minimum TTI is spaced apart 2, the ACK/NACK repetition factor also is 2, so can not influence user's flow), factors such as active user's quantity (the many more influences of number of users are more little), subscriber channel condition in the sub-district.
5.ACK power excursion
Span: with the CQI power excursion.ACK power excursion PO can influence the reliability of ACK transmission.
6.NACK power excursion
Span: with the CQI power excursion.The NACK power excursion can influence the reliability of NACK transmission, can be different from the power excursion of ACK.
Have following several situation need upgrade radio link parameter:
(1) user is in switching state
When HSDPA user is in cell boarder and switches, the control that user UL-DPCCH power is not necessarily served the HSDPA base station, because the power of HS-DPCCH is to do skew on the power basis of UL-DPCCH, so HS-DPCCH also may not served the control of HSDPA base station.So the very poor situation of the channel of HS-DPCCH may occur, need carry out radio link parameter update.
(2) user's movement velocity
User movement speed is fast more, the amplitude of signal fluctuation is big more, thereby need bigger power excursion, and it is too big to work as amplitude fluctuation, the power excursion of maximum 6db (with respect to UL-DPCCH) can not meet the demands, and increases the detection performance that repetition factor is further improved CQI, ACK/NACK so possibly.
(3) decline of channel
Radio communication has individual outstanding feature, and promptly channel impulse response has temporal correlation, and speed is more little, and Doppler frequency shift is more little, and temporal correlation is big more.The decline of the degree of depth can appear in low speed user (second level) in some long periods.
(4) external circule power control
The external circule power control purpose is to make the Block Error Rate of DPDCH as much as possible near the target Block Error Rate, and in order to reach this target, external circule power control is constantly adjusted the target signal interference ratio (Target SIR) of inner-loop power control, so can cause the variation of HS-DPCCH.If it is very big that Target SIR adjusts, the situation that needs are adjusted radio link parameter can appear.
The Radio Link update algorithm is mainly divided two classes at present: the one, and radio network controller (RNC) is by means of signaling notice NodeB user's switching state, and NodeB judges whether to initiate the Radio Link renewal according to user's switching state then.The 2nd, NodeB detects the HS-DPCCH channel quality, judges whether to initiate Radio Link according to channel quality then and upgrades.
First method can only be tackled first kind of situation that needs parameter update, underaction.The second method channel quality refers to target setting HS-DPCCH SIR, then HS-DPCCH SIR and the target HS-DPCCH SIR that measures made comparisons as the foundation of parameter update, the weak point of this method is the user who is not suitable for high-speed motion, and can not well reflect user's systematic function.
To sum up, existing method for updating radio link parameter can not well be supported the HSDPA service-user.Therefore the necessity that this problem is continued research arranged.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of method of the radio link parameter update based on systematic function and channel quality assessment, can be good at overcoming owing to the uplink quality HSDPA service feature that causes that descends descends.
To achieve these goals, the invention provides a kind of method of the radio link parameter update based on systematic function and channel quality assessment, be used for the renewal of the radio link parameter of high speed descending grouping access system uplink high-speed special physical control channel, its characteristics are that it may further comprise the steps:
Step a carries out initialization process, and corresponding threshold value, parameter combinations are selected in indication according to dispatching algorithm, and the register of each module of initialization;
Step b, evaluator periodic evaluation user's systematic function and channel quality;
Step c initiates the opportunity moderator and decides standard to this user's parameter update according to the scheduling times situation of this user in assessment cycle, if scheduling times surpasses the scheduling times threshold value, standard is a systematic function, then execution in step d; Otherwise standard is a channel quality, then jumps to step f;
Steps d is initiated moderator judgement on opportunity custom system performance and whether is surpassed initiation systematic function on opportunity threshold value, if then initiate the parameter update order to the radio link parameter calculator; Otherwise, turn back to step b.
Step e, the radio link parameter calculator is searched pre-set parameter update combined value according to this systematic function value, jumps to step h then;
Step f initiates moderator judgement on opportunity user channel quality and whether surpasses initiation channel quality thresholds on opportunity value, if then initiate the parameter update order to the radio link parameter calculator, and enter step g; Otherwise, jump back to step b;
Step g, radio link parameter calculator adopt the method for emulation or on-the-spot test to obtain the undated parameter value according to the channel quality that monitors;
Step h, the parameter update module is initiated radio link parameter update message to RNC, finishes.
The method of above-mentioned radio link parameter update based on systematic function and channel quality assessment, its characteristics are that the system performance index that this method is used is number of retransmissions/scheduling times, the cqi of use is average signal interference ratio and Doppler frequency shift.
The method of above-mentioned radio link parameter update based on systematic function and channel quality assessment, its characteristics are that in step a, definite method of this initiation systematic function on opportunity threshold value is:
Determine under the control of a dispatching algorithm, under the situation that uplink high-speed special physical control channel is free from mistakes, the maximum of user's number of retransmissions/scheduling times, this value is as systematic function threshold value on the opportunity of initiation.
The method of above-mentioned radio link parameter update based on systematic function and channel quality assessment, its characteristics are, in step e, described parameter update combination is under the control of dispatching algorithm that system uses and power distribution strategies, obtain by emulation or on-the-spot test, and generate the mapping table of number of retransmissions/scheduling times and parameter combinations.
The method of above-mentioned radio link parameter update based on systematic function and channel quality assessment, its characteristics are that this parameter update step comprises:
Step 11, parameter initialization are handled, and the threshold value and the corresponding parameters combination of number of retransmissions/scheduling times threshold value, channel quality sent to initiation moderator on opportunity and undated parameter calculator, and the register of each module of initialization;
Step 12, each user's of Performance Evaluation device periodic evaluation number of retransmissions/scheduling times and channel quality;
Step 13 is initiated the opportunity moderator and is decided the standard of parameter update according to the scheduling times situation of this user in this cycle, if scheduling times surpasses the scheduling times threshold value, standard is a systematic function, and then execution in step 14; Otherwise standard is a channel quality, then jumps to step 16;
Step 14 is initiated moderator judgement on opportunity number of retransmissions/scheduling times and whether is surpassed initiation number of retransmissions on opportunity/scheduling times threshold value, if then initiate the parameter update order to the radio link parameter calculator; Otherwise, turn back to step 12;
Step 15, initiate the Radio Link updating message if desired, check number of retransmissions/scheduling times belongs to which interval in the mapping table of this number of retransmissions/scheduling times and parameter combinations, and the parameter combinations that obtains according to tabling look-up is carried out parameter update, and jumps to step 18;
Step 16 if channel quality surpasses initiation channel quality thresholds on opportunity value, is then initiated the parameter update order to the radio link parameter calculator; Otherwise, jump to step 12;
Step 17 according to the channel quality that monitors, comprises average signal interference ratio and maximum doppler frequency, adopts the method for emulation or on-the-spot test to obtain the undated parameter value;
Step 18, the parameter update module is initiated radio link parameter update message to RNC, finishes.
The method of above-mentioned radio link parameter update based on systematic function and channel quality assessment, its characteristics are that the system performance index that this method is used is throughput, the cqi of use is average signal interference ratio and Doppler frequency shift.
The method of above-mentioned radio link parameter update based on systematic function and channel quality assessment, its characteristics are that in step a, definite method of this initiation systematic function on opportunity threshold value is:
Determine under the control of certain dispatching algorithm, under the situation that the HS-DPCCH channel is free from mistakes, the maximum that user throughput descends, this value is as systematic function threshold value on the opportunity of initiation.
The method of above-mentioned radio link parameter update based on systematic function and channel quality assessment, its characteristics are, in step e, described parameter update combination is under the control of dispatching algorithm that system uses and power distribution strategies, obtain by emulation or on-the-spot test, and generate the mapping table of throughput decline ratio and parameter combinations.
The method of above-mentioned radio link parameter update based on systematic function and channel quality assessment, its characteristics are that this parameter update step comprises:
Step 21, parameter initialization are handled, and the descend threshold value and the corresponding parameters combination of thresholding, channel quality of throughput sent to initiation moderator on opportunity and undated parameter calculator, and the register of each module of initialization;
Step 22, evaluator periodic evaluation each user throughput decline situation and channel quality;
Step 23 is initiated the opportunity moderator and is decided the standard of parameter update according to the scheduling times situation of this user in this cycle, if scheduling times surpasses the scheduling times threshold value, standard is a systematic function, then execution in step step 24; Otherwise standard is a channel quality, then jumps to step f.
Step 24 is initiated moderator judgement on opportunity throughput decline ratio and whether is surpassed initiation throughput threshold on opportunity value, if then initiate the parameter update order to the radio link parameter calculator; Otherwise, turn back to step 22;
Step 25, initiate the Radio Link updating message if desired, check throughput decline ratio belongs to which interval in the mapping table of this throughput decline ratio and parameter combinations, and the parameter combinations that obtains according to tabling look-up is carried out parameter update, jumps to step 28 then.
Step 26 if channel quality surpasses initiation channel quality thresholds on opportunity value, is then initiated the parameter update order to the radio link parameter calculator; Otherwise, jump to step 22;
Step 27 according to the channel quality that monitors, comprises average signal interference ratio and maximum doppler frequency, adopts the method for emulation or on-the-spot test to obtain the undated parameter value;
Step 28 is initiated the Radio Link updating message, finishes.
The present invention carries out radio link parameter update by the method for using system performance and channel quality combination, and user's systematic function is well guaranteed, has avoided because the consequence that the too poor communication quality that causes of up HS-DPCCH channel quality descends.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Description of drawings
Fig. 1 is a radio link parameter update flow chart of the present invention.
Embodiment
As shown in Figure 1, the method for a kind of radio link parameter update based on systematic function and channel quality assessment of the present invention, it may further comprise the steps:
Step a carries out initialization process, selects corresponding threshold value, parameter combinations according to the dispatching algorithm of using, and the register of each module of initialization; Wherein, the threshold value of described correspondence includes the scheduling times threshold value of described initiation systematic function on opportunity threshold value, initiation channel quality thresholds value on opportunity and described decision parameter update standard.
Step b, evaluator periodic evaluation user's systematic function and channel quality;
Step c, initiation moderator on opportunity decides standard to this user's parameter update according to the scheduling times situation of this user in assessment cycle, if scheduling times surpasses scheduling times threshold value (this value can according to the size of assessment cycle and how much setting of number of users), standard is a systematic function, then execution in step d; Otherwise standard is a channel quality, then jumps to step f;
Steps d is initiated moderator judgement on opportunity custom system performance and whether is surpassed initiation systematic function on opportunity threshold value, if then initiate the parameter update order to the radio link parameter calculator, and enter step e; Otherwise, turn back to step b.
Step e, the radio link parameter calculator is searched pre-set parameter update combined value according to this systematic function value, these parameter update combinations are under the control of dispatching algorithm that system uses and power distribution strategies, obtain by emulation or on-the-spot test.Jump to step h then;
Step f if channel quality surpasses initiation channel quality thresholds on opportunity value, then initiates the parameter update order to the radio link parameter calculator; Otherwise, jump to step h.
Step g according to the channel quality that monitors (comprising average signal interference ratio and maximum doppler frequency), adopts the method for emulation or on-the-spot test to obtain the undated parameter value.
Step h, the parameter update module is initiated radio link parameter update message to RNC, finishes.
To be described in further detail each preferred embodiment of technical scheme of the present invention below.
Embodiment one:
The system performance index that present embodiment uses is number of retransmissions/scheduling times.These performance index not only can reflect the throughput situation but also can reflect the time delay situation.The cqi that uses is average signal interference ratio and Doppler frequency shift.
This initiation systematic function on opportunity threshold value is determined method: determines under the control of certain dispatching algorithm, and under the situation that the HS-DPCCH channel is free from mistakes, the maximum of user's number of retransmissions/scheduling times, this value is as systematic function threshold value on the opportunity of initiation.
Wherein, the parameter update step comprises:
A): parameter initialization is handled, and the threshold value and the corresponding parameters combination of number of retransmissions/scheduling times threshold value, channel quality sent to initiation moderator on opportunity and undated parameter calculator, and the register of each module of initialization.
B): each user's of Performance Evaluation device periodic evaluation number of retransmissions/scheduling times and channel quality.
C): initiate the opportunity moderator and decide the standard of parameter update according to the scheduling times situation of this user in this cycle, if scheduling times surpasses a certain threshold value, standard is a systematic function, then execution in step d; Otherwise standard is a channel quality, then jumps to step f.
D): initiate moderator judgement on opportunity number of retransmissions/scheduling times and whether surpass initiation number of retransmissions on opportunity/scheduling times threshold value, if then initiate the parameter update order to the radio link parameter calculator; Otherwise, turn back to step b.
E): initiate the Radio Link updating message if desired, check number of retransmissions/scheduling times belongs to which interval in the table 2, and the parameter combinations that obtains according to tabling look-up is carried out parameter update, jumps to h).
The corresponding relation of table 2 number of retransmissions/scheduling times and parameter combinations is given an example:
| Number of retransmissions/scheduling times P | a1＜P ＜＝a2 | a2＜P ＜＝a3 | a3＜P ＜＝a4 | a4＜P ＜＝a5 | a5＜P ＜＝a6 | a6＜P |
| Parameter combinations | 1 | 2 | 3 | 4 | 5 | 6 |
| CQI circulation report cycle | X11 | X12 | X13 | X14 | X15 | X16 |
| The CQI repetition factor | X21 | X22 | X23 | X24 | X25 | X26 |
| The CQI power excursion | X31 | X32 | X33 | X34 | X35 | X36 |
| The ACK/NACK repetition factor | X41 | X42 | X43 | X44 | X45 | X46 |
| The ACK power excursion | X51 | X52 | X53 | X54 | X55 | X56 |
| The NACK power excursion | X61 | X62 | X63 | X64 | X65 | X66 |
Table 2 is under the control of dispatching algorithm that system uses and power distribution strategies, obtains by emulation or on-the-spot test.
F):, then initiate the parameter update order to the radio link parameter calculator if channel quality surpasses initiation channel quality thresholds on opportunity value; Otherwise, jump to h).
G):, adopt the method for emulation or on-the-spot test to obtain the undated parameter value according to the channel quality that monitors (comprising average signal interference ratio and maximum doppler frequency).
H): the parameter update module is initiated radio link parameter update message to RNC, finishes.
Embodiment two:
The system performance index that this example uses is throughput.The cqi that uses is average signal interference ratio and Doppler frequency shift.
Definite method of initiation systematic function on opportunity threshold value: determine under the control of certain dispatching algorithm, under the situation that the HS-DPCCH channel is free from mistakes, the maximum that user throughput descends, this value is as systematic function threshold value on the opportunity of initiation.
The parameter update step:
A): parameter initialization is handled, and the descend threshold value and the corresponding parameters combination of thresholding, channel quality of throughput sent to initiation moderator on opportunity and undated parameter calculator, and the register of each module of initialization.
B): evaluator periodic evaluation each user throughput decline situation and channel quality.
C): initiate the opportunity moderator and decide the standard of parameter update according to the scheduling times situation of this user in this cycle, if scheduling times surpasses a certain threshold value, standard is a systematic function, then execution in step d; Otherwise standard is a channel quality, then jumps to step f.
D): initiate moderator judgement on opportunity throughput decline ratio and whether surpass initiation throughput threshold on opportunity value.If then initiate the parameter update order to the radio link parameter calculator; Otherwise, turn back to step b.
E): initiate the Radio Link updating message if desired, check the throughput drop-out value belongs to which interval in the table 3, and the parameter combinations that obtains according to tabling look-up is carried out parameter update, jumps to h then).
The corresponding relation of table 3 throughput decline ratio and parameter combinations is given an example:
| Throughput drop-out value ratio T | a1＜T ＜＝a2 | a2＜T ＜＝a3 | a3＜T ＜＝a4 | a4＜T ＜＝a5 | a5＜T ＜＝a6 | a6＜T |
| Parameter combinations | 1 | 2 | 3 | 4 | 5 | 6 |
| CQI circulation report cycle | X11 | X12 | X13 | X14 | X15 | X16 |
| The CQI repetition factor | X21 | X22 | X23 | X24 | X25 | X26 |
| The CQI power excursion | X31 | X32 | X33 | X34 | X35 | X36 |
| The ACK/NACK repetition factor | X41 | X42 | X43 | X44 | X45 | X46 |
| The ACK power excursion | X51 | X52 | X53 | X54 | X55 | X56 |
| The NACK power excursion | X61 | X62 | X63 | X64 | X65 | X66 |
Table 3 is under the control of dispatching algorithm that system uses and power distribution strategies, obtains by emulation or on-the-spot test.
F):, then initiate the parameter update order to the radio link parameter calculator if channel quality surpasses initiation channel quality thresholds on opportunity value; Otherwise, be transferred to h).
G):, adopt the method for emulation or on-the-spot test to obtain the undated parameter value according to the channel quality that monitors (comprising average signal interference ratio and maximum doppler frequency).
H): initiate the Radio Link updating message, finish.
By top two embodiment as can be seen, method for updating radio link parameter of the present invention has bigger application flexibility, method for updating radio link parameter based on systematic function and channel quality can be provided, and well assurance can not cause the customer service performance significantly to descend because of the reason of up based on feedback link.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (9)
1, a kind of method of the radio link parameter update based on systematic function and channel quality assessment is used for the renewal of the radio link parameter of high speed descending grouping access system uplink high-speed special physical control channel, it is characterized in that it may further comprise the steps:
Step a carries out initialization process, and corresponding threshold value, parameter combinations are selected in indication according to dispatching algorithm, and the register of each module of initialization;
Step b, evaluator periodic evaluation user's systematic function and channel quality;
Step c initiates the opportunity moderator and decides standard to this user's parameter update according to the scheduling times situation of this user in assessment cycle, if scheduling times surpasses the scheduling times threshold value, standard is a systematic function, then execution in step d; Otherwise standard is a channel quality, then jumps to step f;
Steps d is initiated moderator judgement on opportunity custom system performance and whether is surpassed initiation systematic function on opportunity threshold value, if then initiate the parameter update order to the radio link parameter calculator; Otherwise, turn back to step b.
Step e, the radio link parameter calculator is searched pre-set parameter update combined value according to this systematic function value, jumps to step h then;
Step f initiates moderator judgement on opportunity user channel quality and whether surpasses initiation channel quality thresholds on opportunity value, if then initiate the parameter update order to the radio link parameter calculator, and enter step g; Otherwise, jump back to step b;
Step g, radio link parameter calculator adopt the method for emulation or on-the-spot test to obtain the undated parameter value according to the channel quality that monitors;
Step h, the parameter update module is initiated radio link parameter update message to RNC, finishes.
2, the method for the radio link parameter update based on systematic function and channel quality assessment according to claim 1, it is characterized in that, the system performance index that this method is used is number of retransmissions/scheduling times, and the cqi of use is average signal interference ratio and Doppler frequency shift.
3, the method for the radio link parameter update based on systematic function and channel quality assessment according to claim 2 is characterized in that in step a, definite method of this initiation systematic function on opportunity threshold value is:
Determine under the control of a dispatching algorithm, under the situation that uplink high-speed special physical control channel is free from mistakes, the maximum of user's number of retransmissions/scheduling times, this value is as systematic function threshold value on the opportunity of initiation.
4, the method for the radio link parameter update based on systematic function and channel quality assessment according to claim 3, it is characterized in that, in step e, described parameter update combination is under the control of dispatching algorithm that system uses and power distribution strategies, obtain by emulation or on-the-spot test, and generate the mapping table of number of retransmissions/scheduling times and parameter combinations.
5, the method for the radio link parameter update based on systematic function and channel quality assessment according to claim 4 is characterized in that this parameter update step comprises:
Step 11, parameter initialization are handled, and the threshold value and the corresponding parameters combination of number of retransmissions/scheduling times threshold value, channel quality sent to initiation moderator on opportunity and undated parameter calculator, and the register of each module of initialization;
Step 12, each user's of Performance Evaluation device periodic evaluation number of retransmissions/scheduling times and channel quality;
Step 13 is initiated the opportunity moderator and is decided the standard of parameter update according to the scheduling times situation of this user in this cycle, if scheduling times surpasses the scheduling times threshold value, standard is a systematic function, and then execution in step 14; Otherwise standard is a channel quality, then jumps to step 16;
Step 14 is initiated moderator judgement on opportunity number of retransmissions/scheduling times and whether is surpassed initiation number of retransmissions on opportunity/scheduling times threshold value, if then initiate the parameter update order to the radio link parameter calculator; Otherwise, turn back to step 12;
Step 15, initiate the Radio Link updating message if desired, check number of retransmissions/scheduling times belongs to which interval in the mapping table of this number of retransmissions/scheduling times and parameter combinations, and the parameter combinations that obtains according to tabling look-up is carried out parameter update, and jumps to step 18;
Step 16 if channel quality surpasses initiation channel quality thresholds on opportunity value, is then initiated the parameter update order to the radio link parameter calculator; Otherwise, jump to step 12;
Step 17 according to the channel quality that monitors, comprises average signal interference ratio and maximum doppler frequency, adopts the method for emulation or on-the-spot test to obtain the undated parameter value;
Step 18, the parameter update module is initiated radio link parameter update message to RNC, finishes.
6, the method for the radio link parameter update based on systematic function and channel quality assessment according to claim 1, it is characterized in that, the system performance index that this method is used is throughput, and the cqi of use is average signal interference ratio and Doppler frequency shift.
7, the method for the radio link parameter update based on systematic function and channel quality assessment according to claim 6 is characterized in that in step a, definite method of this initiation systematic function on opportunity threshold value is:
Determine under the control of certain dispatching algorithm, under the situation that the HS-DPCCH channel is free from mistakes, the maximum that user throughput descends, this value is as systematic function threshold value on the opportunity of initiation.
8, the method for the radio link parameter update based on systematic function and channel quality assessment according to claim 7, it is characterized in that, in step e, described parameter update combination is under the control of dispatching algorithm that system uses and power distribution strategies, obtain by emulation or on-the-spot test, and generate the mapping table of throughput decline ratio and parameter combinations.
9, the method for the radio link parameter update based on systematic function and channel quality assessment according to claim 8 is characterized in that this parameter update step comprises:
Step 21, parameter initialization are handled, and the descend threshold value and the corresponding parameters combination of thresholding, channel quality of throughput sent to initiation moderator on opportunity and undated parameter calculator, and the register of each module of initialization;
Step 22, evaluator periodic evaluation each user throughput decline situation and channel quality;
Step 23 is initiated the opportunity moderator and is decided the standard of parameter update according to the scheduling times situation of this user in this cycle, if scheduling times surpasses the scheduling times threshold value, standard is a systematic function, then execution in step step 24; Otherwise standard is a channel quality, then jumps to step f.
Step 24 is initiated moderator judgement on opportunity throughput decline ratio and whether is surpassed initiation throughput threshold on opportunity value, if then initiate the parameter update order to the radio link parameter calculator; Otherwise, turn back to step 22;
Step 25, initiate the Radio Link updating message if desired, check throughput decline ratio belongs to which interval in the mapping table of this throughput decline ratio and parameter combinations, and the parameter combinations that obtains according to tabling look-up is carried out parameter update, jumps to step 28 then.
Step 26 if channel quality surpasses initiation channel quality thresholds on opportunity value, is then initiated the parameter update order to the radio link parameter calculator; Otherwise, jump to step 22;
Step 27 according to the channel quality that monitors, comprises average signal interference ratio and maximum doppler frequency, adopts the method for emulation or on-the-spot test to obtain the undated parameter value;
Step 28 is initiated the Radio Link updating message, finishes.
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| CNB2005100947322A CN100536368C (en) | 2005-09-28 | 2005-09-28 | Method for updating radio link parameter based on system performance and channel quality evaluation |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101404806B (en) * | 2008-11-24 | 2010-04-21 | 北京天碁科技有限公司 | Method and system for testing HSDPA demodulation and decoding performance of wireless terminal equipment |
| CN101686485B (en) * | 2008-09-22 | 2012-04-25 | 中国移动通信集团设计院有限公司 | Method for fetching high speed downlink packet access transmission throughput and system thereof |
| CN101227690B (en) * | 2008-02-04 | 2013-01-16 | 中兴通讯股份有限公司 | System and method for testing GSM system accepting/receiving module uplink and downlink channel quality |
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| CN107071742A (en) * | 2016-01-19 | 2017-08-18 | 联发科技股份有限公司 | The method of the communicator performance of communicator and enhancing with Doppler effect |
| WO2019084711A1 (en) * | 2017-10-30 | 2019-05-09 | Nokia Shanghai Bell Co., Ltd. | Methods and apparatuses for repetition transmission |
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| US10085213B1 (en) * | 2017-05-15 | 2018-09-25 | Apple Inc. | Device, system, and method for a high power mode for a cellular connection |
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| US8488567B2 (en) | 2007-10-02 | 2013-07-16 | Samsung Electronics Co., Ltd | Repeating transmissions of signals in communication systems |
| CN104796230A (en) * | 2007-10-02 | 2015-07-22 | 三星电子株式会社 | Repeating transmissions of signals in communication systems |
| US9749997B2 (en) | 2007-10-02 | 2017-08-29 | Samsung Electronics Co., Ltd | Repeating transmissions of signals in communication systems |
| US11234221B2 (en) | 2007-10-02 | 2022-01-25 | Samsung Electronics Co., Ltd | Repeating transmissions of signals in communication systems |
| CN101227690B (en) * | 2008-02-04 | 2013-01-16 | 中兴通讯股份有限公司 | System and method for testing GSM system accepting/receiving module uplink and downlink channel quality |
| CN101686485B (en) * | 2008-09-22 | 2012-04-25 | 中国移动通信集团设计院有限公司 | Method for fetching high speed downlink packet access transmission throughput and system thereof |
| CN101404806B (en) * | 2008-11-24 | 2010-04-21 | 北京天碁科技有限公司 | Method and system for testing HSDPA demodulation and decoding performance of wireless terminal equipment |
| CN107071742A (en) * | 2016-01-19 | 2017-08-18 | 联发科技股份有限公司 | The method of the communicator performance of communicator and enhancing with Doppler effect |
| WO2019084711A1 (en) * | 2017-10-30 | 2019-05-09 | Nokia Shanghai Bell Co., Ltd. | Methods and apparatuses for repetition transmission |
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