CN103024915B - A kind of method realizing uplink sounding reference signal periodic time self-adapting - Google Patents
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Abstract
The invention provides the method that one realizes uplink sounding reference signal (SRS) periodic time self-adapting, if comprising the steps: to exist in A community is in the user terminal of lower-speed state, judge that community belongs in following three kinds of situations any: situation 1: current access customer number adds that saltus step hysteresis factors reduces saltus step thresholding lower than the SRS cycle; Situation 2: current access customer number deducts saltus step hysteresis factors and is greater than the SRS cycle and increases saltus step thresholding; Situation 3: other situations; If B belongs to situation 1 reduce SRS configuration cycle; If belong to situation 2, increase SRS configuration cycle; If belong to situation 3, SRS configuration cycle to remain unchanged; If C SRS configuration cycle remains unchanged in stepb, current SRS configuration cycle is adopted to carry out SRS resource distribution to the low speed user terminal accessed in community, if SRS configuration cycle changes in stepb, then according to current SRS configuration cycle, SRS resource reprovision is carried out to the low speed user terminal accessed in community.
Description
Technical field
The present invention relates to mobile communication technology field, particularly relate to a kind of method realizing uplink sounding reference signal periodic time self-adapting.
Background technology
For LTE uplink, base station (eNodeB) receives the interception reference signal of UE transmitting and carries out measuring to channel quality and quantize, quantized result is as the scheduling foundation for system uplink resource, select the physical resource being applicable to current environment to carry out upstream data mandate, improve the availability of frequency spectrum.
Uplink sounding reference signal mechanism realizes principle: in business process of establishing, and the uplink sounding reference signal resource of eNodeB needed for terminal distribution, terminal, according to the Resourse Distribute of eNodeB, specific running time-frequency resource sends uplink sounding reference signal.In LTE system, the Resourse Distribute that eNodeB carries out, comprise the resource such as specific transmission sequence and the time-frequency shared by described transmission sequence, corresponding uplink sounding reference signal Resourse Distribute, for cell-level (Cell-Specific) and user class (Ue-Specific) two class, wherein the resource of cell-level passes through broadcast transmission, the resource of user class carries out Resourse Distribute when wireless heterogeneous networks (RRC) connection establishment and switching user access, if need to redistribute terminal uplink interception reference signal resource, need to carry out newly assigned resource instruction by reprovision flow process of eating dishes without rice or wine.
In resource allocation process, due to uplink sounding reference signal and community sub-frame configuration, ascending-descending subframes configure, special subframe is configured with certain restriction relation, various combination determines the operable time-domain resource subframe of uplink sounding reference signal and can transmit the symbolic number of uplink sounding reference signal.In uplink sounding reference signal resource allocation process, the cycle that Access Network configures according to current operation maintenance system (OM) carries out uplink sounding reference signal Resourse Distribute.The configuration cycle of uplink sounding reference signal determines uplink sounding reference signal and reports density, corresponding length is less than the configuration cycle of 5ms, need can distribute two or four frequency domain position in a radio frames, may cause can not distributing uplink sounding reference signal resource (if uplink-downlink configuration is 1 to UE, sub-frame configuration is that 3 ({ Isosorbide-5-Nitrae }) characteristic time slot configuration form is less than 4).Simultaneously in the network of actual motion, because the uncertainty of online user's quantity and user's mobility randomness (translational speed) have different configuration requirements to uplink sounding reference signal cycle and frequency domain resource, if configuration cycle can not realize self-adaptative adjustment, part UE can be caused can not to carry out uplink sounding reference signal report, or the problem such as channel quality estimation is inaccurate, in prior art, Operation & Maintenance System carries out the method in static configuration cycle and cannot solve the above-mentioned problem.
Summary of the invention
The invention provides a kind of method realizing uplink sounding reference signal periodic time self-adapting, effectively can solve many UE at a slow speed and carry out the problem of uplink sounding reference signal channel estimation resources deficiency simultaneously.
A kind of method realizing uplink SRS periodic time self-adapting that the embodiment of the present invention provides, comprises the steps:
Be in the user terminal of lower-speed state if exist in A community, judge that community belongs in following three kinds of situations any:
Situation 1: current access customer number adds that saltus step hysteresis factors reduces saltus step thresholding lower than the SRS cycle;
Situation 2: current access customer number deducts saltus step hysteresis factors and is greater than the SRS cycle and increases saltus step thresholding;
Situation 3: other situations not belonging to situation 1 or situation 2;
If B belongs to situation 1, reduce SRS configuration cycle; If belong to situation 2, increase SRS configuration cycle; If belong to situation 3, SRS configuration cycle to remain unchanged;
If C SRS configuration cycle remains unchanged in stepb, current SRS configuration cycle is adopted to carry out SRS resource distribution to the low speed user terminal accessed in community, if SRS configuration cycle changes in stepb, then according to current SRS configuration cycle, SRS resource reprovision is carried out to the low speed user terminal accessed in community.
Preferably, in described step B, if belong to situation 1, and current SRS configuration cycle be agreement regulation minimum SRS configuration cycle, then the SRS configuration cycle keeping current is constant.
Preferably, in described step B, if belong to situation 2, and current SRS configuration cycle be agreement regulation maximum SRS configuration cycle, then the SRS configuration cycle keeping current is constant.
Preferably, before described steps A, comprise further:
According to the essential history list of switching and the allocating and measuring time interval and switching times and high low speed thresholding multilevel iudge terminal velocity state, if it is determined that terminal is in middling speed state, carries out the SRS distribution in dedicated bandwidth size and cycle, and go to step C; If it is determined that terminal is in lower-speed state, perform steps A described in step; If it is determined that terminal is in fast state, SRS distribution is not carried out to this user terminal, and exits this flow process.
Preferably, comprise further after step C:
D, Timing Advance TA is utilized to calculate the speed of user terminal;
E, judge whether subscriber teminal speed state changes, if become fast state, discharge the SRS resource of this user terminal; Constant if maintained the original state, this user terminal is not processed; If mutually switch between middling speed/low speed, this user terminal is carried out to the SRS resource reprovision in dedicated bandwidth and cycle.
Preferably, the SRS cycle reduces saltus step thresholding and SRS cycle and increases saltus step thresholding and calculate according to number of users threshold configuration method;
Described number of users thresholding is according to following formulae discovery:
Wherein T
srsthe current collocating uplink interception reference signal cycle, T
srsexcept during=2ms;
for sequence cyclic shift value, C
combfor transmission comb, m
srs, 0bandwidth is intercepted, m for uplink sounding reference signal is maximum
srs, ifor bandwidth is intercepted in current use, i is user class band width configuration, S
ifor special sub-uplink pilot time slot takies symbol numbers, N
hulbe sub-frame of uplink number in half radio frames, f
hbe that half radio frames takies number of sub-frames, P
thrsfor the percentage threshold of uplink sounding reference signal configuration cycle self adaptation conversion.
Preferably, the method comprises further:
To the user terminal of first this community of access, uplink sounding reference signal Resourse Distribute is carried out according to pre-configured SRS configuration cycle, if distribute the failure of uplink sounding reference signal resource, then carry out the increase of uplink sounding reference signal periodic time self-adapting, until uplink sounding reference signal accesses successfully.
As can be seen from the above technical solutions, calculate and switching times by utilizing Timing Advance, it is whether the judgement of high-speed terminal, and carry out uplink sounding reference signal Resourse Distribute according to the translational speed of terminal, utilize the method accurately can carry out terminal channel quality estimation, and configure self-adaptative adjustment performance period according to the user that accesses terminal, effectively can solve many UE at a slow speed and carry out the problem of uplink sounding reference signal channel estimation resources deficiency simultaneously, have to utilize and optimize ascending resource distribution, improve power system capacity.
Accompanying drawing explanation
Fig. 1 is the concrete implementation step schematic diagram of the method realizing uplink sounding reference signal periodic time self-adapting that the embodiment of the present invention proposes.
Embodiment
Basic thought of the present invention is the configuration cycle of carrying out dynamic conditioning uplink sounding reference signal according to the translational speed of the current access customer number of system and UE and uplink sounding reference signal access-in resource thresholding, realizes the self-optimizing of uplink sounding reference signal cycle Resourse Distribute.
Along with the increase of system access customer volume, terminal needs the uplink sounding reference signal total resources distributed to increase thereupon.In this case, according to community access customer number active detecting uplink sounding reference signal resource thresholding, when uplink sounding reference signal Resourse Distribute close to configured threshold or current cannot distribute uplink sounding reference signal resource time, then increase the uplink sounding reference signal cycle and reprovision is carried out to online terminal, to allow more user to access, when user accesses fewer, if lower than current uplink sounding reference signal configured threshold, then reduce uplink sounding reference signal period assignment (the cell configuration cycle can not be less than).
The translational speed of access user is detected simultaneously, judge whether current access terminal speed is high speed UE, if arrive the high speed thresholding of configuration, then the uplink sounding reference signal not carrying out this terminal distributes, if the translational speed accessed terminal current reaches middling speed configured threshold, then according to B
srs=3, the middling speed uplink sounding reference signal cycle carries out Resourse Distribute (this period assignment should belong to smaller period assignment as 5ms), to make the quick reporting uplink interception reference signal of terminal, enters up channel link-quality and accurately estimates.
For making the know-why of technical solution of the present invention, advantage and technique effect clearly, below by way of specific embodiment, the present invention program is elaborated further.
The concrete implementation step of the present invention as shown in Figure 1, if user terminal is from other cell merge to this community, then from step 101.
Step 101: according to switching essential history list and the allocating and measuring time interval, and switching times and high low speed thresholding multilevel iudge terminal velocity state, if it is determined that terminal is in middling speed state, execution step 102; If it is determined that terminal is in lower-speed state, perform step 104; If it is determined that terminal is in fast state, perform step 103.
Below provide an embodiment utilizing switching times to judge UE speed state:
For switching into terminal, judge that terminal present speed principle utilizes the number of times switched, if cell merge number of times reaches n-CellChangeHigh number in normal t-HystNormal, then belong to high-speed terminal, in normal t-HystNormal, switching times reaches n-CellChangeMedium number, then belong to middling speed terminal; Other belong to low speed terminal.Its main thresholding value cell reselection parameters (definition of its threshold value is shown in 36.304); Be briefly described as follows; 1, the additional continuous periods (t-HystNormal) of normal condition, 2, the cell reselection number of times (n-CellChangeMedium) of middling speed mobile status is entered, 3, enter the cell reselection number of times (n-CellChangeHigh) of high-speed moving state.
Step 102: the SRS carrying out dedicated bandwidth size and cycle distributes, and goes to step 108.Particularly, cycle and B is carried out according to middling speed translational speed
srsthe bandwidth of=3 is configured.Fixed cycle and its occurrence of band width configuration is adopted to be configured by Operation and Maintenance model for middling speed user, the general cycle and bandwidth value less of 5ms or 10ms (the cycle span that agreement specifies is 2ms, 5ms, 10ms, 20ms, 40ms, 80ms, 160ms, 320ms), larger for band width configuration (SRS-Bandwidth agreement span is 0 ~ 3) its Configuration Values, actual SRS bandwidth allocation bandwidth is less, when SRS distribution bandwidth is configured to 3, distributing bandwidth is 4 PRB.
Step 103: SRS distribution is not carried out to this user terminal, and exits this flow process.
Step 104 is to 107: be in the user terminal of lower-speed state if exist in community, community according to the OM initial period configure, whether the judgement of current period adaptive threshold, saltus step hysteresis factors carry out periodic time self-adapting conversion, may comprise following three kinds of situations:
(1) current access customer number adds that saltus step hysteresis factors (N) reduces saltus step thresholding lower than the SRS cycle; Wherein, saltus step hysteresis factors (N) obtains from the configuration of Operation and Maintenance model, and the SRS cycle reduces saltus step thresholding and automatically calculates according to number of users threshold configuration method.
In this case, the configuration cycle of uplink sounding reference signal is reduced.But, if current SRS configuration cycle is the minimum SRS configuration cycle of agreement regulation, then remain unchanged.
The mode reduced is according to current configuration cycle, reduces step by step (the configuration cycle span of the uplink sounding reference signal specified in agreement is 2ms, 5ms, 10ms, 20ms, 40ms, 80ms, 160ms, 320ms) according to protocol value.
(2) current access customer number deducts saltus step hysteresis factors (N) and is greater than the SRS cycle and increases saltus step thresholding; The SRS cycle increases saltus step thresholding and automatically calculates according to number of users threshold configuration method, and the maximum cycle of SRS is 320ms according to agreement regulation.
In this case, the configuration cycle of uplink sounding reference signal is increased; But, if the maximum configured cycle that current configuration cycle is agreement to be specified, then remain unchanged.The mode increased is: increase step by step according to protocol value, the configuration cycle span of the uplink sounding reference signal specified in agreement is 2ms, 5ms, 10ms, 20ms, 40ms, 80ms, 160ms, 320ms.
(3) other situation SRS period assignment are constant.
Below provide the specific embodiment of a kind of number of users thresholding configuration.Its number of users thresholding computational methods:
Step 108: for above-mentioned three kinds of situations, adopts corresponding SS configuration cycle to carry out SRS resource distribution respectively, if cyclomorphosis, then carries out SRS resource reprovision to access user.
Step 109: utilize Timing Advance (TA) value to calculate the speed of user terminal.
Below provide one and utilize T
acalculate UE speed embodiment.
According to Timing Advance (T
a) value carries out user terminal rate calculations, computing formula is:
wherein t
amsfor the T calculated
avalue Transforming units is time span after ms, t
ams=16T
s* | T
a-31| (t
ams=16
t s* T
astochastic accessing),
t
aDVfor T
areport cycle, then compare according to the rate value (V) that calculates and configured threshold, if higher than High Speed Threshold, be then fast state, if lower than low velocity threshold, be then lower-speed state, other are middling speed state.
Step 110 is to 113: judge whether terminal velocity state changes, if become fast state, discharges the SRS resource of this user terminal; Constant if maintained the original state, do not process; If mutually switch (middling speed switches to low speed or low speed to switch to middling speed) between middling speed/low speed, carry out the SRS resource reprovision in dedicated bandwidth and cycle, the method for salary distribution, with step 108, then returns step 104.
If user terminal is new access user, then direct from step 104, other are with above-mentioned flow process.
To first access user, configuration cycle according to OM carries out uplink sounding reference signal Resourse Distribute, if distribute the failure of uplink sounding reference signal resource, then carry out the increase of uplink sounding reference signal periodic time self-adapting, until uplink sounding reference signal accesses successfully.
The present invention program realizes simply, complexity is low, take into full account that the speed characteristics of terminal carry out uplink sounding reference signal Resourse Distribute, can accurately utilize uplink sounding reference signal to carry out up channel link-quality to estimate, and according to the customer volume of access user, carry out the self-adaptative adjustment in uplink sounding reference signal cycle, make the more users of access utilize uplink sounding reference signal to carry out up channel link-quality and estimate, optimize ascending resource to distribute, improve power system capacity.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (7)
1. realize a method for uplink sounding reference signal SRS periodic time self-adapting, it is characterized in that, comprise the steps:
Be in the user terminal of lower-speed state if exist in A community, judge that community belongs in following three kinds of situations any:
Situation 1: current access customer number adds that saltus step hysteresis factors reduces saltus step thresholding lower than the SRS cycle;
Situation 2: current access customer number deducts saltus step hysteresis factors and is greater than the SRS cycle and increases saltus step thresholding;
Situation 3: other situations not belonging to situation 1 or situation 2;
If B belongs to situation 1, reduce SRS configuration cycle; If belong to situation 2, increase SRS configuration cycle; If belong to situation 3, SRS configuration cycle to remain unchanged;
If C SRS configuration cycle remains unchanged in stepb, current SRS configuration cycle is adopted to carry out SRS resource distribution to the low speed user terminal accessed in community, if SRS configuration cycle changes in stepb, then according to current SRS configuration cycle, SRS resource reprovision is carried out to the low speed user terminal accessed in community.
2. method according to claim 1, is characterized in that, in described step B, if belong to situation 1, and current SRS configuration cycle be agreement regulation minimum SRS configuration cycle, then the SRS configuration cycle keeping current is constant.
3. method according to claim 1, is characterized in that, in described step B, if belong to situation 2, and current SRS configuration cycle be agreement regulation maximum SRS configuration cycle, then the SRS configuration cycle keeping current is constant.
4. method according to claim 1, is characterized in that, before described steps A, comprises further:
According to the essential history list of switching and the allocating and measuring time interval and switching times and high low speed thresholding multilevel iudge terminal velocity state, if it is determined that terminal is in middling speed state, carries out the SRS distribution in dedicated bandwidth size and cycle, and go to step C; If it is determined that terminal is in lower-speed state, perform steps A described in step; If it is determined that terminal is in fast state, SRS distribution is not carried out to this user terminal, and exits this flow process.
5. the method according to any one of Claims 1-4, is characterized in that, comprises further after step C:
D, Timing Advance TA is utilized to calculate the speed of user terminal;
E, judge whether subscriber teminal speed state changes, if become fast state, discharge the SRS resource of this user terminal; Constant if maintained the original state, this user terminal is not processed; If mutually switch between middling speed/low speed, this user terminal is carried out to the SRS resource reprovision in dedicated bandwidth and cycle.
6. the method according to any one of Claims 1-4, is characterized in that, the SRS cycle reduces saltus step thresholding and SRS cycle and increases saltus step thresholding and calculate according to number of users threshold configuration method;
Described number of users thresholding is according to following formulae discovery:
Wherein T
srsfor the current collocating uplink interception reference signal cycle, T
srsexcept during=2ms;
for sequence cyclic shift value, C
combfor transmission comb, m
srs, 0bandwidth is intercepted, m for uplink sounding reference signal is maximum
srs, ifor bandwidth is intercepted in current use, i is user class band width configuration, S
ifor special sub-uplink pilot time slot takies symbol numbers, N
hulbe sub-frame of uplink number in half radio frames, f
hbe that half radio frames takies number of sub-frames, P
thrsfor the percentage threshold of uplink sounding reference signal configuration cycle self adaptation conversion.
7. the method according to any one of Claims 1-4, is characterized in that, the method comprises further:
To the user terminal of first this community of access, uplink sounding reference signal Resourse Distribute is carried out according to pre-configured SRS configuration cycle, if distribute the failure of uplink sounding reference signal resource, then carry out the increase of uplink sounding reference signal periodic time self-adapting, until uplink sounding reference signal accesses successfully.
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| CN105828438B (en) * | 2015-01-04 | 2019-06-25 | 中国移动通信集团公司 | A kind of configuration method of reference signal, device, base station and user equipment |
| WO2016198095A1 (en) * | 2015-06-09 | 2016-12-15 | Huawei Technologies Co., Ltd. | Methods and nodes in a wireless communication network |
| WO2017193314A1 (en) * | 2016-05-11 | 2017-11-16 | 华为技术有限公司 | Reference signal configuration method, device, and base station in mobile communications |
| CN106211246A (en) * | 2016-06-17 | 2016-12-07 | 深圳市金立通信设备有限公司 | A kind of reduce the method for channel-sounding signal transmission times, base station and terminal |
| CN107566101A (en) * | 2016-06-30 | 2018-01-09 | 中兴通讯股份有限公司 | A kind of collocation method, device and the base station of detection reference signal SRS resource |
| CN109474399B (en) * | 2017-09-08 | 2021-12-31 | 中兴通讯股份有限公司 | Method, device and base station for configuring sounding reference signal resources |
| CN111918400B (en) * | 2019-05-07 | 2023-04-25 | 大唐移动通信设备有限公司 | SRS resource allocation method and device |
| CN110213831B (en) * | 2019-05-29 | 2022-05-24 | 成都中科微信息技术研究院有限公司 | Scheduling method and system combining SRS period |
| CN110225595B (en) * | 2019-05-29 | 2022-05-24 | 成都中科微信息技术研究院有限公司 | Scheduling base station and system combining SRS period |
| US12132557B2 (en) | 2019-07-05 | 2024-10-29 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and network device for signal resource configuration |
| CN114342532A (en) * | 2019-12-31 | 2022-04-12 | 华为技术有限公司 | Method and device for configuring Sounding Reference Signal (SRS) period |
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| WO2008093952A3 (en) * | 2007-02-02 | 2009-11-05 | Lg Electronics Inc. | Antenna switching method and method for transmitting and receiving signals for the same |
| CN101714897A (en) * | 2009-11-12 | 2010-05-26 | 普天信息技术研究院有限公司 | Method for configuring sounding reference signals |
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| WO2008093952A3 (en) * | 2007-02-02 | 2009-11-05 | Lg Electronics Inc. | Antenna switching method and method for transmitting and receiving signals for the same |
| CN101714897A (en) * | 2009-11-12 | 2010-05-26 | 普天信息技术研究院有限公司 | Method for configuring sounding reference signals |
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