CN107547115A - The method and device that a kind of narrow beam takes over seamlessly - Google Patents
The method and device that a kind of narrow beam takes over seamlessly Download PDFInfo
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- CN107547115A CN107547115A CN201610493498.9A CN201610493498A CN107547115A CN 107547115 A CN107547115 A CN 107547115A CN 201610493498 A CN201610493498 A CN 201610493498A CN 107547115 A CN107547115 A CN 107547115A
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Abstract
The invention discloses the method and device that a kind of narrow beam takes over seamlessly, it is related to mobile communication technology field, its method includes：Base station side obtains the wave beam index of each wave beam by being detected to each wave beam；Wave beam index highest wave beam in all wave beams is elected to be optimal beam by base station side；The current downlink wave beam deterioration degree for current uplink beam deterioration degree or the user side detection that base station side detects according to base station, judge whether to need to trigger beam switchover；When base station side judges to need to trigger beam switchover, by current uplink beam or current downlink beam switchover to the optimal beam.The present invention considers the performance asymmetry judgement switching of up-downgoing according to the wave beam evaluation index selection optimal beam with predictability, can both avoid " ping-pong " occurred in beam switchover, reduce system burden, again the antijamming capability of increase system.
Description
Technical field
The invention belongs to mobile communication technology field, method and device that more particularly to a kind of narrow beam takes over seamlessly.
Background technology
Pilot signal strength or signal to noise ratio in existing each wave beam of method Main Basiss, by itself and beam switchover Parameters threshold
Value is compared to the wave beam that selection meets condition, as optimal beam and suboptimum wave beam；Then switch to optimal beam or most
Excellent wave beam is multiplexed with suboptimum wave beam.It is as follows using the prior art of the above method:
1、《The fast beam switching method of multiple antennas is utilized under high-speed mobile environment》Application publication number CN 103607231
A；
2、《Method for switvhing wave packet of intelligent antenna》Authorization Notice No. CN1520220A；
3、《Beam selection method and base station》Application publication number CN104955061A；
Optimal beam, the condition of suboptimum wave beam institute foundation selected in the prior art is relatively simple, should in high frequency narrow beam
With in scene, when optimal beam, suboptimum wave beam are spatially in same direction, when the wave beam of the direction is moved because of user equipment
Or other reasonses, when causing beam blockage, optimal beam, suboptimum wave beam can fail simultaneously.
The content of the invention
The technical problem that the scheme provided according to embodiments of the present invention solves is merely dependent on instantaneous signal strength, letter
Make an uproar and be used for the selection gist of wave beam, easily cause handoff failure or ping-pong.
The method that a kind of narrow beam provided according to embodiments of the present invention takes over seamlessly, including：
Base station side obtains the wave beam index of each wave beam by being detected to each wave beam；
Wave beam index highest wave beam in all wave beams is elected to be optimal beam by base station side；
The current downlink wave beam for current uplink beam deterioration degree or the user side detection that base station side detects according to base station is disliked
Change degree, judge whether to need to trigger beam switchover；
When base station side judges to need to trigger beam switchover, by current uplink beam or current downlink beam switchover described in
Optimal beam.
Preferably, by being detected to each wave beam, obtain the wave beam index of each wave beam includes the base station side：
Base station side obtains the instantaneous value of each wave beam signal to noise ratio, is averaged by being detected to the signal to noise ratio of each wave beam
Value and variation tendency；
According to instantaneous value, average value and the variation tendency of each wave beam signal to noise ratio, the wave beam index of each wave beam is obtained.
Preferably, the current uplink beam deterioration degree that the base station side detects according to base station, judges whether to need to trigger
Beam switchover includes：
By the deterioration degree of the current uplink beam signal to noise ratio of base station detection and preset uplink beam signal-to-noise ratio degradation door
Limit is compared；
If the deterioration degree of the current uplink beam signal to noise ratio of base station detection exceedes preset uplink beam signal-to-noise ratio degradation
Thresholding, then judge to need to trigger beam switchover；
If the deterioration degree of the current uplink beam signal to noise ratio of base station detection is less than preset uplink beam signal-to-noise ratio degradation
Thresholding, then judge that beam switchover need not be triggered.
Preferably, the current downlink wave beam deterioration degree that the base station side detects according to user side, judge whether to need to touch
Hair beam switchover includes：
By the deterioration degree of the current downlink wave beam signal to noise ratio of user side detection and preset downlink wave beam signal-to-noise ratio degradation
Thresholding is compared；
Disliked if the deterioration degree of the current downlink wave beam signal to noise ratio of user side detection exceedes preset downlink wave beam signal to noise ratio
Change thresholding, then report the handover request for needing triggering beam switchover to base station side, so that base station side judges to need to trigger ripple
Beam switches；
If the deterioration degree of the current downlink wave beam signal to noise ratio of user side detection is disliked less than preset downlink wave beam signal to noise ratio
Change thresholding, then judge that beam switchover need not be triggered.
Preferably, the user side by carry switch mark handover request report base station side, so as to base station side according to
Switching is identified to judge to need to trigger beam switchover.
Preferably, it is described when base station side judges to need to trigger beam switchover, by current uplink beam or current downlink ripple
Beam, which is switched to the optimal beam, to be included：
When base station side judges to need to trigger beam switchover, determine whether optimal beam be present；
When base station side determines to there is currently optimal beam, by current uplink beam or current downlink beam switchover described in
Optimal beam；
When base station side determines to there is currently no optimal beam, then without handover operation.
The device that a kind of narrow beam provided according to embodiments of the present invention takes over seamlessly, including：
Detection module, for base station side by being detected to each wave beam, obtain the wave beam index of each wave beam；
Selecting module, wave beam index highest wave beam in all wave beams is elected to be optimal beam for base station side；
Judge module, the current uplink beam deterioration degree detected for base station side according to base station or user side detection are worked as
Preceding downlink wave beam deterioration degree, judge whether to need to trigger beam switchover；
Handover module, for when base station side judge need trigger beam switchover when, by current uplink beam or current downlink
Beam switchover is to the optimal beam.
Preferably, the detection module includes：
Detection unit, for base station side by being detected to the signal to noise ratio of each wave beam, obtain each wave beam signal to noise ratio
Instantaneous value, average value and variation tendency, and according to instantaneous value, average value and the variation tendency of each wave beam signal to noise ratio,
Obtain the wave beam index of each wave beam.
Preferably, the judge module includes：
First comparing unit, for the deterioration degree of current uplink beam signal to noise ratio that detects base station with it is preset up
Wave beam signal-to-noise ratio degradation thresholding is compared；
First judging unit, the deterioration degree of current uplink beam signal to noise ratio for being detected when base station exceed preset
Traveling wave beam signal-to-noise ratio degradation thresholding, then judge to need to trigger beam switchover, and the current uplink beam noise when base station detection
The deterioration degree of ratio is less than preset uplink beam signal-to-noise ratio degradation thresholding, then judges that beam switchover need not be triggered.
Preferably, the judge module includes：
Second comparing unit, for the deterioration degree of current downlink wave beam signal to noise ratio that detects user side with it is preset under
Traveling wave beam signal-to-noise ratio degradation thresholding is compared；
Second judging unit, the deterioration degree of current downlink wave beam signal to noise ratio for being detected when user side exceed preset
Downlink wave beam signal-to-noise ratio degradation thresholding, then the handover request for needing triggering beam switchover is reported to base station side, so as to base station
Side judges to need to trigger beam switchover, and when user side detection current downlink wave beam signal to noise ratio deterioration degree less than preset
Downlink wave beam signal-to-noise ratio degradation thresholding, then judge need not trigger beam switchover.
The scheme provided according to embodiments of the present invention, optimal ripple is have selected according to predictive comprehensive evaluation index
Beam, while consider the asymmetry of up-downgoing performance, improve the success rate and validity of switching.
Brief description of the drawings
Fig. 1 is the method flow diagram that a kind of narrow beam provided in an embodiment of the present invention takes over seamlessly；
Fig. 2 is the schematic device that a kind of narrow beam provided in an embodiment of the present invention takes over seamlessly；
Fig. 3 is the flow chart of user side triggering switching provided in an embodiment of the present invention；
Fig. 4 is the flow chart of base station side triggering switching provided in an embodiment of the present invention；
Fig. 5 is the flow chart of base station side beam switchover provided in an embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing to a preferred embodiment of the present invention will be described in detail, it will be appreciated that described below is excellent
Select embodiment to be merely to illustrate and explain the present invention, be not intended to limit the present invention.
Fig. 1 is the method flow diagram that a kind of narrow beam provided in an embodiment of the present invention takes over seamlessly, as shown in figure 1, including：
Step S101：Base station side obtains the wave beam index of each wave beam by being detected to each wave beam；
Step S102：Wave beam index highest wave beam in all wave beams is elected to be optimal beam by base station side；
Step S103：Working as current uplink beam deterioration degree or the user side detection that base station side detects according to base station is front lower
Traveling wave beam deterioration degree, judge whether to need to trigger beam switchover；
Step S104：When base station side judges to need to trigger beam switchover, by current uplink beam or current downlink wave beam
It is switched to the optimal beam.
Wherein, by being detected to each wave beam, obtain the wave beam index of each wave beam includes the base station side：Base station
By being detected to the signal to noise ratio of each wave beam, the instantaneous value, average value and change for obtaining each wave beam signal to noise ratio become for side
Gesture；According to instantaneous value, average value and the variation tendency of each wave beam signal to noise ratio, the wave beam index of each wave beam is obtained.
Wherein, the current uplink beam deterioration degree that the base station side detects according to base station, judge whether to need to trigger ripple
Beam switching includes：By the deterioration degree of the current uplink beam signal to noise ratio of base station detection and preset uplink beam signal-to-noise ratio degradation
Thresholding is compared；If the deterioration degree of the current uplink beam signal to noise ratio of base station detection exceedes preset uplink beam signal to noise ratio
Deteriorate thresholding, then judge to need to trigger beam switchover；If the deterioration degree of the current uplink beam signal to noise ratio of base station detection is less than
Preset uplink beam signal-to-noise ratio degradation thresholding, then judge that beam switchover need not be triggered.The base station side is examined according to user side
The current downlink wave beam deterioration degree of survey, judge whether to need triggering beam switchover to include：The current downlink that user side is detected
The deterioration degree of wave beam signal to noise ratio is compared with preset downlink wave beam signal-to-noise ratio degradation thresholding；If user side detection is current
The deterioration degree of downlink wave beam signal to noise ratio exceedes preset downlink wave beam signal-to-noise ratio degradation thresholding, then is reported to base station side for needing
The handover request of beam switchover is triggered, so that base station side judges to need to trigger beam switchover；If working as user side detection is front lower
The deterioration degree of traveling wave beam signal to noise ratio is less than preset downlink wave beam signal-to-noise ratio degradation thresholding, then judges that need not trigger wave beam cuts
Change.Specifically, the handover request for carrying switching mark is reported base station side by the user side, so that base station side is according to switching
Identify to judge to need to trigger beam switchover.
Wherein, it is described when base station side judges to need to trigger beam switchover, by current uplink beam or current downlink wave beam
Being switched to the optimal beam includes：When base station side judges to need to trigger beam switchover, determine whether optimal ripple be present
Beam；When base station side determines to there is currently optimal beam, by current uplink beam or current downlink beam switchover to described optimal
Wave beam；When base station side determines to there is currently no optimal beam, then without handover operation.
Fig. 2 is the schematic device that a kind of narrow beam provided in an embodiment of the present invention takes over seamlessly, as shown in Fig. 2 including：
Detection module 201, for base station side by being detected to each wave beam, obtain the wave beam index of each wave beam；Selecting module
202, wave beam index highest wave beam in all wave beams is elected to be optimal beam for base station side；Judge module 203, for base station
The current downlink wave beam deterioration degree for current uplink beam deterioration degree or the user side detection that lateral root detects according to base station, judgement are
It is no to need to trigger beam switchover；Handover module 204, for when base station side judges to need to trigger beam switchover, inciting somebody to action current up
Wave beam or current downlink beam switchover are to the optimal beam.
Wherein, the detection module 201 includes：Detection unit, for base station side by entering to the signal to noise ratio of each wave beam
Row detection, obtains instantaneous value, average value and the variation tendency of each wave beam signal to noise ratio, and according to the wink of each wave beam signal to noise ratio
Duration, average value and variation tendency, obtain the wave beam index of each wave beam.The judge module 203 includes：First is relatively more single
Member, for the deterioration degree of current uplink beam signal to noise ratio and the preset uplink beam signal-to-noise ratio degradation thresholding for detecting base station
It is compared；First judging unit, the deterioration degree of current uplink beam signal to noise ratio for being detected when base station exceed preset
Uplink beam signal-to-noise ratio degradation thresholding, then judge to need to trigger beam switchover, and the current uplink beam letter when base station detection
Make an uproar than deterioration degree be less than preset uplink beam signal-to-noise ratio degradation thresholding, then judge need not trigger beam switchover；Second
Comparing unit, for the deterioration degree of current downlink wave beam signal to noise ratio and the preset downlink wave beam signal to noise ratio for detecting user side
Deteriorate thresholding to be compared；Second judging unit, for the deterioration degree of the current downlink wave beam signal to noise ratio detected when user side
More than preset downlink wave beam signal-to-noise ratio degradation thresholding, then report to base station side and disappear for the switching for needing to trigger beam switchover
Breath, so that base station side judges to need to trigger beam switchover, and the deterioration of the current downlink wave beam signal to noise ratio when user side detection
Degree is less than preset downlink wave beam signal-to-noise ratio degradation thresholding, then judges that beam switchover need not be triggered.
The content of the embodiment of the present invention is described in detail with reference to Fig. 3 to Fig. 5：
Beam switchover of the embodiment of the present invention comprises the following steps:
Step 1：Constantly measure the SNR (Signal Noise Ratio, signal to noise ratio) of each wave beam；
Base station side constantly measures the SNR of each uplink beam and user side constantly measures the SNR of each downlink wave beam.Wherein, ripple
Beam noise can also be level value, performance number or combination.
Step 2：Base station side evaluates wave beam by SNR, selects optimal beam, i.e. wave beam evaluation index highest wave beam is
Optimal beam.
The selection evaluation index of optimal beam described in this step is described as follows：
Set an overall target L(i, j)Carry out systematic evaluation wave beam：
Wherein,WithThe SNR instantaneous values of wave beam (i, j), average value and change are represented respectively
Change trend, α, β, γ are wave beam evaluation criteria parameter, are adjustable parameter, are respectively 0.1,0.9,0.5 with reference to value.
For the average of nearly N_eval SNR value, formula is：
The slope calculated for N_eval SNR by least square method, the formula of least square method are：
Wherein,It is that wave beam (i, j) in l (l=1 ... N) secondary SNR detected, N_eval is average value and change
The evaluation window size of change trend.N=N_eval.
Step 3：When meeting handover triggering condition, start switching flow, be switched to optimal beam.
Wherein, beam switchover trigger condition is following thrin：
Trigger condition 1：Base station side detects that current beam performance is bad, as shown in Figure 4；
Thresholding：Th1_BS=max ((L_max-delta_L), L_worstcase)
Wherein, L_worstcase is the minimum threshold of evaluation criteria.
Decision logic：
There is N1_err SNR to be less than Th1_BS in the base station detection nearly N1 subframes of current beam；
Detect nearly N1_dec subframes SNR and be below Th1_BS, and monotone decreasing in base station.
Switch target：Optimal beam.
Trigger condition 2：Base station side receives the bad instruction of user's lateral beam performance, as shown in Figure 3；
User side judges the bad condition of wave beam performance, thresholding Th1_UE=L_worstcase, and decision logic is same as above, if with
Family side judges that performance is bad, then switching mark position Flag_beamTransfer is set into 1.
Decision logic：
Base station side detects sends switching mark position Flag_beamTransfer=1 from UE sides, and verifies the upper of wave beam
Descending geometrical symmetry.(geometrical symmetry decision condition：Base station side N1 subframes SNR average value is less than L_worstcase+
delta_L)。
Switch target：Optimal beam.
Trigger condition 3 (abnormality processing)：Base station side/user side detects current beam extreme.
Thresholding：Th2_BS=Th2_UE=L_Transfailed (CQIChannel Quality Indicator, channel
Quality instruction lowest demodulation thresholding).
Decision logic：
Base station side detects continuous N2 frames SNR and is below Th2_BS, then base station side switches；
User side detects continuous N2 frames SNR and is below Th2_UE, then user side switches；
Switch target：Again beam selection.
Beam switchover described in this step is described as follows：
1st, current beam SNR is less than certain thresholding, and when optimal beam be present, is switched to optimal beam；
If the 2, optimal beam is still abnormal, the flow for reselecting wave beam is switched to again；
If the 3, optimal beam is not present, enter the flow for reselecting wave beam；
If the 4, base station side or the continuous N frames of UE sides SNR are less than thresholding, assert that link can not communicate, then return to and select again
Select the flow of wave beam.
As shown in figure 5, beam switchover old process is as follows：
Before handover trigger：Flag bit Flag_beamTransfer=0.
Handover trigger：Handover trigger is unified in base station side and obtained, and base station passes through UCI (Uplink Control after triggering
Information, ascending control information) carry optimal beam number；Flag bit Flag_beamTransfer=1 in UCI is represented
In switching flow.Since base station side come into force beam switchover sending optimal beam number in N_act subframes, and in N_act subframes
After start business.To UCI signalings, come into force UE side joints beam switchover in N_act subframes, and starts business after N_act subframes.
Finishing switching：DMRS (Data Management and Retrieval System, the number within N_ck subframe
According to management and searching system) measurement SNR value is normal, then flag bit Flag_beamTransfer=0.
DMRS detections are abnormal：Correlation, peaking and threshold value ratio are done to DMRS, then judges that DMRS is different if less than threshold value
Often.Threshold value changes (SNR-5dB) of wave beam according to SRS (Sounding Reference Signal, detection reference signal) detections
To define.
As shown in figure 5, beam switchover abnormality processing is as follows：
The state coverage of switching SRS：Normal access SRS, carries out SRS beam scannings；
It is switched to optimal beam failure：BS and UE is switched to the optimal beam moment (T+N_act), and DMRS detections are abnormal afterwards, then
Again beam selection, and by flag bit Flag_beamTransfer=0.
The scheme provided according to embodiments of the present invention, optimal beam is selected according to having predictive wave beam evaluation index.
The performance asymmetry judgement switching of up-downgoing is considered simultaneously.It so can both avoid " the table tennis effect occurred in beam switchover
Should ", system burden is reduced, increases the antijamming capability of system again, ensure that beam switchover is smooth, effective.
Although the present invention is described in detail above, the invention is not restricted to this, those skilled in the art of the present technique
Various modifications can be carried out according to the principle of the present invention.Therefore, all modifications made according to the principle of the invention, all should be understood to
Fall into protection scope of the present invention.
Claims (10)
1. a kind of method that narrow beam takes over seamlessly, including：
Base station side obtains the wave beam index of each wave beam by being detected to each wave beam；
Wave beam index highest wave beam in all wave beams is elected to be optimal beam by base station side；
The current downlink wave beam for current uplink beam deterioration degree or the user side detection that base station side detects according to base station deteriorates journey
Degree, judge whether to need to trigger beam switchover；
When base station side judges to need to trigger beam switchover, by current uplink beam or current downlink beam switchover to described optimal
Wave beam.
2. according to the method for claim 1, the base station side obtains each wave beam by being detected to each wave beam
Wave beam index includes：
Base station side by being detected to the signal to noise ratio of each wave beam, obtain instantaneous value, the average value of each wave beam signal to noise ratio with
And variation tendency；
According to instantaneous value, average value and the variation tendency of each wave beam signal to noise ratio, the wave beam index of each wave beam is obtained.
3. according to the method for claim 1, the current uplink beam deterioration degree that the base station side detects according to base station, sentence
It is disconnected whether to need triggering beam switchover to include：
The deterioration degree of the current uplink beam signal to noise ratio of base station detection is entered with preset uplink beam signal-to-noise ratio degradation thresholding
Row compares；
If the deterioration degree of the current uplink beam signal to noise ratio of base station detection exceedes preset uplink beam signal-to-noise ratio degradation thresholding,
Then judge to need to trigger beam switchover；
If the deterioration degree of the current uplink beam signal to noise ratio of base station detection is less than preset uplink beam signal-to-noise ratio degradation thresholding,
Then judge that beam switchover need not be triggered.
4. according to the method for claim 1, the current downlink wave beam deterioration degree that the base station side detects according to user side,
Judge whether to need triggering beam switchover to include：
By the deterioration degree of the current downlink wave beam signal to noise ratio of user side detection and preset downlink wave beam signal-to-noise ratio degradation thresholding
It is compared；
If the deterioration degree of the current downlink wave beam signal to noise ratio of user side detection exceedes preset downlink wave beam signal-to-noise ratio degradation door
Limit, then the handover request for needing triggering beam switchover is reported to base station side, so that base station side judges to need triggering wave beam to cut
Change；
If the deterioration degree of the current downlink wave beam signal to noise ratio of user side detection is less than preset downlink wave beam signal-to-noise ratio degradation door
Limit, then judge that beam switchover need not be triggered.
5. according to the method for claim 4, the handover request for carrying switching mark is reported base station side by the user side,
So that base station side judges to need to trigger beam switchover according to switching mark.
6. it is described when base station side judges to need to trigger beam switchover according to any described methods of claim 1-5, will be current
Uplink beam or current downlink beam switchover include to the optimal beam：
When base station side judges to need to trigger beam switchover, determine whether optimal beam be present；
When base station side determines to there is currently optimal beam, by current uplink beam or current downlink beam switchover to described optimal
Wave beam；
When base station side determines to there is currently no optimal beam, then without handover operation.
7. the device that a kind of narrow beam takes over seamlessly, including：
Detection module, for base station side by being detected to each wave beam, obtain the wave beam index of each wave beam；
Selecting module, wave beam index highest wave beam in all wave beams is elected to be optimal beam for base station side；
Working as judge module, the current uplink beam deterioration degree detected for base station side according to base station or user side detection is front lower
Traveling wave beam deterioration degree, judge whether to need to trigger beam switchover；
Handover module, for when base station side judge need trigger beam switchover when, by current uplink beam or current downlink wave beam
It is switched to the optimal beam.
8. device according to claim 7, the detection module includes：
Detection unit, for base station side by being detected to the signal to noise ratio of each wave beam, obtain the wink of each wave beam signal to noise ratio
Duration, average value and variation tendency, and according to instantaneous value, average value and the variation tendency of each wave beam signal to noise ratio, obtain
The wave beam index of each wave beam.
9. device according to claim 7, the judge module includes：
First comparing unit, for the deterioration degree of current uplink beam signal to noise ratio and the preset uplink beam for detecting base station
Signal-to-noise ratio degradation thresholding is compared；
First judging unit, the deterioration degree of the current uplink beam signal to noise ratio for being detected when base station exceed preset upgoing wave
Beam signal-to-noise ratio degradation thresholding, then judge to need to trigger beam switchover, and the current uplink beam signal to noise ratio when base station detection
Deterioration degree is less than preset uplink beam signal-to-noise ratio degradation thresholding, then judges that beam switchover need not be triggered.
10. device according to claim 7, the judge module includes：
Second comparing unit, for the deterioration degree of current downlink wave beam signal to noise ratio and the preset down going wave for detecting user side
Beam signal-to-noise ratio degradation thresholding is compared；
Second judging unit, the deterioration degree of current downlink wave beam signal to noise ratio for being detected when user side exceed preset descending
Wave beam signal-to-noise ratio degradation thresholding, then the handover request for needing triggering beam switchover is reported to base station side, so that base station side is sentenced
It is disconnected to need to trigger beam switchover, and when user side detection current downlink wave beam signal to noise ratio deterioration degree less than under preset
Traveling wave beam signal-to-noise ratio degradation thresholding, then judge that beam switchover need not be triggered.
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| WO2019218936A1 (en) * | 2018-05-17 | 2019-11-21 | 索尼公司 | Electronic device and method for wireless communication, and computer readable storage medium |
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| WO2021027739A1 (en) * | 2019-08-09 | 2021-02-18 | 华为技术有限公司 | Beam failure recovery method and device |
| WO2021248444A1 (en) * | 2020-06-12 | 2021-12-16 | Qualcomm Incorporated | Receive beam control |
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