CN102316519B - Method and device for regulating value of physical control format indicator channel - Google Patents
Method and device for regulating value of physical control format indicator channel Download PDFInfo
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Abstract
The invention provides a method for regulating a value of a physical control format indicator channel. The method comprises the following steps of: acquiring statistical information, wherein the statistical information comprises one or more kinds of control channel resource information, service resource information and service channel quality of service information; and regulating the value of the physical control format indicator channel according to the statistical information. The invention also provides a device for regulating the value of the physical control format indicator channel. By the method, the phenomenon of utilization unbalance between control channel resources and service channel resources can be better avoided, and the phenomenon of high system message frequency caused by frequent conversion can be prevented.
Description
Technical field
The present invention relates to mobile communication system, relate in particular to a kind of method and apparatus of the value of adjusting Physical Control Format Indicator Channel.
Background technology
Long Term Evolution (Long Term Evolution, the information of the OFDM symbol numbers (1,2 or 3 even 4) of LTE) transmitting for Physical Downlink Control Channel (Physical downlink control channel, PDCCH) in a subframe of down link Physical Control Format Indicator Channel carrying.In agreement, being defined in can be as shown in table 1 for the OFDM assemble of symbol of transmission PDCCH in a subframe.
Table 1
In agreement, provide the span of the Physical Control Format Indicator Channel (Physical controlformat indicator channel, CFI) in every kind of situation, but be not given in this how to confirm of CFI value in which kind of situation.Because CFI information will issue in each Transmission Time Interval (TTI), therefore more conventional method has two kinds at present: first method is that each TTI dynamically adjusts its value as required; Second method is to be directly fixed as certain value.The defect that these two kinds of methods exist is: first method can cause frequently issuing of system message; Second method may cause the waste of control channel resource or the situation of control channel inadequate resource, the method also can affect the reasonable utilization of service resources, resource-constrained such as controlling, when service resources is more sufficient, now may occur controlling that resource has not remained but service resources also has remaining situation, will affect the quality assurance of resource utilization and business if now do not adjust the value of CFI.
Summary of the invention
The technical problem to be solved in the present invention is the method and apparatus that proposes a kind of CFI of adjustment value, to reach the reasonable utilization to control channel resource, thereby further reach service resources and control the balance between the utilization of resources, thereby effectively promoting ensuring the quality of products of business.
In order to address the above problem, the invention provides a kind of method of adjusting Physical Control Format Indicator Channel value, comprising:
Obtain statistical information, described statistical information comprise following one or more: control channel resource information, service resources information and Traffic Channel quality of service information;
Adjust the value of Physical Control Format Indicator Channel according to described statistical information.
Further, said method also can have following characteristics, described in periodically carrying out, obtains statistical information, adjusts the step of the value of Physical Control Format Indicator Channel according to statistical information.
Further, said method also can have following characteristics, described control channel resource information comprises the level and smooth information of residue control channel number of unit, described service resources information comprises: the level and smooth information of surplus lines number of resources, described Traffic Channel quality of service information comprises: up guarantee bit rate meets the level and smooth information of rate and/or descending guarantee bit rate meets the level and smooth information of rate.
Further, said method also can have following characteristics, and the described step according to the value of statistical information adjustment Physical Control Format Indicator Channel comprises:
When residue control channel number of unit be 0 and uplink and downlink ensure that bit rate meets rate all lower than speed thresholding, and surplus lines resource exceedes surplus lines resource thresholding, the value of Physical Control Format Indicator Channel increases a designated value, and the value of Physical Control Format Indicator Channel after increasing is no more than the maximum of Physical Control Format Indicator Channel;
When residue control channel number of unit exceedes residue control channel cell gate in limited time, the value of Physical Control Format Indicator Channel is reduced to adjustment number of symbols corresponding to this residue control channel unit thresholding.
Further, said method also can have following characteristics, and the step of the value of described adjustment Physical Control Format Indicator Channel comprises:
When residue control channel number of unit is 0, and up guarantee bit rate meets rate lower than speed thresholding, and when descending guarantee bit rate meets rate and is not less than speed thresholding, keep the value of Physical Control Format Indicator Channel constant, promote the reserved ratio in ascending control channel unit;
Or, when residue control channel number of unit is 0, and descending guarantee bit rate is lower than speed thresholding, and up guarantee bit rate is while being not less than speed thresholding, keep the value of Physical Control Format Indicator Channel constant, promote the reserved ratio in down control channel unit.
The present invention also provides a kind of device of adjusting Physical Control Format Indicator Channel value, and described device comprises information acquisition unit and adjustment unit, wherein:
Described information acquisition unit is used for: obtain statistical information, described statistical information comprise following one or more: control channel resource information, service resources information and Traffic Channel quality of service information;
Described adjustment unit is used for: the value of adjusting Physical Control Format Indicator Channel according to described statistical information.
Further, said apparatus also can have following characteristics, and described information acquisition unit is that described adjustment unit is the value for periodically adjusting described Physical Control Format Indicator Channel for periodically obtaining statistical information.
Further, said apparatus also can have following characteristics, described control channel resource information comprises the level and smooth information of residue control channel number of unit, described service resources information comprises: the level and smooth information of surplus lines number of resources, described Traffic Channel quality of service information comprises: up guarantee bit rate meets the level and smooth information of rate and/or descending guarantee bit rate meets the level and smooth information of rate.
Further, said apparatus also can have following characteristics, described adjustment unit be for:
When residue control channel number of unit be 0 and uplink and downlink ensure that bit rate meets rate all lower than speed thresholding, and surplus lines resource exceedes surplus lines resource thresholding, the value of Physical Control Format Indicator Channel increases a designated value, and the value of Physical Control Format Indicator Channel after increasing is no more than the maximum of Physical Control Format Indicator Channel;
When residue control channel number of unit exceedes residue control channel cell gate in limited time, the value of Physical Control Format Indicator Channel is reduced to adjustment number of symbols corresponding to this residue control channel unit thresholding.
Further, said apparatus also can have following characteristics, described adjustment unit be for:
When residue control channel number of unit is 0, and up guarantee bit rate meets rate lower than speed thresholding, and when descending guarantee bit rate meets rate and is not less than speed thresholding, keep the value of Physical Control Format Indicator Channel constant, promote the reserved ratio in ascending control channel unit;
Or, when residue control channel number of unit is 0, and descending guarantee bit rate is lower than speed thresholding, and up guarantee bit rate is while being not less than speed thresholding, keep the value of Physical Control Format Indicator Channel constant, promote the reserved ratio in down control channel unit.
The method of the invention can avoid utilizing between control channel resource and traffic channel resource unbalanced phenomenon preferably, and prevents that frequent changes from causing system message phenomenon frequently.Meanwhile, to the reasonable control of CFI value, better saving resource is to Traffic Channel, thereby is conducive to the lifting of average spectral efficiency (ase).
Brief description of the drawings
Fig. 1 is the method flow that the present invention adjusts CFI value.
Embodiment
Core concept of the present invention is: propose a kind of taking control channel resource and the mutual balance of traffic channel resource utilance and ensure the semi-static adjustment CFI obtaining value method of QoS as benchmark, obtain statistical information, comprise QoS (Quality of Service, service quality) the guarantee situation of use statistics and the Traffic Channel of control channel resource; Adjudicate CFI value according to the result of statistical information.
The invention provides a kind of method of adjusting Physical Control Format Indicator Channel value, comprising:
Obtain statistical information, described statistical information comprise following one or more: control channel resource information, service resources information and Traffic Channel quality of service information;
Adjust the value of Physical Control Format Indicator Channel according to described statistical information.
Wherein, described in periodically carrying out, obtain statistical information, adjust the step of the value of Physical Control Format Indicator Channel according to statistical information.
Wherein, described control channel resource information comprises the level and smooth information of residue control channel number of unit, described service resources information comprises: the level and smooth information of surplus lines number of resources, described Traffic Channel quality of service information comprises: up guarantee bit rate meets the level and smooth information of rate and/or descending guarantee bit rate meets the level and smooth information of rate.
Wherein, the described step according to the value of statistical information adjustment Physical Control Format Indicator Channel comprises:
When residue control channel number of unit be 0 and uplink and downlink ensure that bit rate meets rate all lower than speed thresholding, and surplus lines resource exceedes surplus lines resource thresholding, the value of Physical Control Format Indicator Channel increases a designated value, and the value of Physical Control Format Indicator Channel after increasing is no more than the maximum of Physical Control Format Indicator Channel;
When residue control channel number of unit exceedes residue control channel cell gate in limited time, the value of Physical Control Format Indicator Channel is reduced to adjustment number of symbols corresponding to this residue control channel unit thresholding;
When residue control channel number of unit is 0, and up guarantee bit rate meets rate lower than speed thresholding, and when descending guarantee bit rate meets rate and is not less than speed thresholding, keep the value of Physical Control Format Indicator Channel constant, promote the reserved ratio in ascending control channel unit;
Or, when residue control channel number of unit is 0, and descending guarantee bit rate is lower than speed thresholding, and up guarantee bit rate is while being not less than speed thresholding, keep the value of Physical Control Format Indicator Channel constant, promote the reserved ratio in down control channel unit.
The method that the invention provides adjustment CFI value comprises:
Step S1, default CFI value judgement cycle T, in cycle T, in each downlink transfer subframe, following information being done to statistics upgrades: one or more in control channel resource information, service resources information and Traffic Channel quality of service information, if reach the integral multiple of cycle T, enter step S2;
A kind of statistical method is: obtain residue control channel resource information, up-downgoing GBR (Guarantee Bit Rate ensures bit rate) separately and meet one or more in rate information, service resources information; Above-mentioned each information can be carried out smoothly.
Wherein, the span of T can be 50-500ms, also can be decided to be as required other values, and the present invention is not construed as limiting this;
Step S2, in the moment of arrival cycle T, does to judge as follows:
Condition one, whether CCE (Control Channel Element, control channel unit) surplus resources exceedes CCE residue threshold value NUM_CCE
i, j, wherein i is historical CFI number of symbols, j span is 1 to (current maximum CFI value-1), NUM_CCE
i, jrepresent the respectively difference of corresponding historical CFI value and other selected CFI value corresponding CCE number under current system bandwidth;
Condition two: judge that descending GBR meets ratio and whether meets ratio thresholding Thr_GBR lower than speed;
Condition three: judge that up GBR meets ratio and whether meets ratio thresholding Thr_GBR lower than speed;
Condition four: judge whether surplus lines number of resources exceedes surplus lines resource thresholding Thr_RB;
While judgement, can all adjudicate condition one, two, three, four, also can only adjudicate wherein one or more conditions.
Step S3, adjudicates PDCCH (Physical downlinkcontrol channel, physical layer descending control channel) number of symbols adjusted value according to the information adjustment having obtained, and obtains CFI adjusted value, thereby obtains new CFI value.
The basic thought of judgement is:
If CCE resource has residue, and exceed CCE residue threshold value, reduce CFI value;
If CCE resource is without residue, and the GBR of up-downgoing meets rate all lower than given thresholding, and surplus lines resource exceedes surplus lines resource thresholding Thr_RB, and considering increases CFI value, thereby increases the dispatcher meeting of each UE;
If CCE resource is without residue, up GBR meets rate higher than given thresholding, descending GBR meets rate lower than given thresholding, or, CCE is without residue, descending GBR meets rate higher than given thresholding, and up GBR meets rate lower than given thresholding, increases GBR and meets the CCE reserved ratio of rate lower than a side of given thresholding.
Semi-static definite CFI value provided by the invention determines that method step is as follows, referring to Fig. 1, comprising:
Step 110, does statistics to following information in each downlink transfer subframe in cycle T and upgrades: the level and smooth information of residue control channel number of resources; Up-downgoing GBR separately meets the level and smooth information of rate; The level and smooth information of surplus lines number of resources; If reach the integral multiple of cycle T, enter step 120; T is the CFI value judgement cycle;
Step 120, the moment of arrival cycle T, according to the information of statistics, CFI value is adjusted, comprising:
(a) if residue CCE number be 0 and up-downgoing GBR meet rate all lower than speed thresholding Thr_GBR, and surplus lines resource exceedes surplus lines resource thresholding Thr_RB, CFI value increases designated value, this designated value can be an OFDM symbol, note adjustment amount is Δ, and CFI value after adjusting can not exceed the maximum of CFI;
(b) if residue CCE number be 0 and up GBR meet rate and be not less than thresholding Thr_GBR, and descending GBR meets rate lower than thresholding Thr_GBR, keep CFI value constant, can consider to change the reserved ratio of up-downgoing CCE, in this situation, promote the reserved ratio of descending CCE; If residue CCE number be 0 and up GBR meet rate lower than thresholding Thr_GBR, and descending GBR meets rate and is not less than thresholding Thr_GBR, keeps CFI value constant, promotes the reserved ratio of up CCE;
Wherein, the step-length of adjusting the reserved ratio of up-downgoing CCE is Step_CCE, and span is 0.1-0.5;
(c) if residue CCE outnumbers Thr_CCE
i, needing to carry out CFI value decreased number, minimizing value is CCE residue thresholding Thr_CCE
icorresponding adjustment number of symbols Δ;
Step 130, output CFI value is CFI
current=Δ+CFI
his.
Concrete, step 110) in information smoothing can adopt but be not limited to (1-α) T
his+ α T
current, wherein α is smoothing factor, T
hisfor the historical information after level and smooth, T
currentcurrent acquisition up-to-date information.
Be described further below by concrete application example.
Embodiment 1
Suppose 10MHz system bandwidth, conventional subframe, two antenna ports, conventional CP, CCE number corresponding to different CFI values is respectively: 9,26,42, current sign if 3, the threshold value of lowering an OFDM symbol and two OFDM symbols is respectively 16 and 33.If thresholding Thr_GBR value is 0.95.Wherein the reserved CCE ratio of up-downgoing is 1: 2, i.e. up 14 CCE, descending 28 CCE.
Carry out Information Statistics, Information Statistics result is: CCE residue number is 0, and it is 100% that up GBR meets rate, and it is 80% that descending GBR meets rate.
Judge according to statistical information, CCE residue number is 0, and up GBR meets rate 100% and is greater than Thr_GBR, descending GBR meets rate 80% and is less than Thr_GBR, meets situation in step 120 (b), promotes descending CCE resource reservation ratio, its Step_CCE value is 0.1, so
individual CE need to distribute to descending; Now up CCE number is 9, and descending CCE number is 33; Now do not change CFI value.
Embodiment 2
Suppose 10MHz system bandwidth, conventional subframe, two antenna ports, conventional CP, CCE number corresponding to different CFI values is respectively: 9,26,42, current sign if 3, the threshold value of lowering an OFDM symbol and two OFDM symbols is respectively 16 and 33.If thresholding Thr_GBR value is 0.95.Wherein the reserved CCE ratio of up-downgoing is 1: 2, i.e. up 14 CCE, descending 28 CCE.
Carry out Information Statistics, Information Statistics result is: CCE residue number is 0, and it is 85% that up GBR meets rate, and it is 80% that descending GBR meets rate.
Judge according to statistical information, because CCE residue number is 0, up-downgoing GBR meets rate all lower than thresholding Thr_GBR, meets situation in step 120 (a), and CFI value increases by 1.Because the maximum number of symbols of current configuration CFI value is 3, and CFI value after adjusting can not exceed the maximum of CFI, and the result of therefore judging is that CFI value is constant.
The present invention also provides a kind of device of adjusting Physical Control Format Indicator Channel value, and described device comprises information acquisition unit and adjustment unit, wherein:
Described information acquisition unit is used for: obtain statistical information, described statistical information comprise following one or more: control channel resource information, service resources information and Traffic Channel quality of service information;
Described adjustment unit is used for: the value of adjusting Physical Control Format Indicator Channel according to described statistical information.
Wherein, described information acquisition unit is that described adjustment unit is the value for periodically adjusting described Physical Control Format Indicator Channel for periodically obtaining statistical information.
Wherein, described control channel resource information comprises the level and smooth information of residue control channel number of unit, described service resources information comprises: the level and smooth information of surplus lines number of resources, described Traffic Channel quality of service information comprises: up guarantee bit rate meets the level and smooth information of rate and/or descending guarantee bit rate meets the level and smooth information of rate.
Wherein, described adjustment unit be for:
When residue control channel number of unit be 0 and uplink and downlink ensure that bit rate meets rate all lower than speed thresholding, and surplus lines resource exceedes surplus lines resource thresholding, the value of Physical Control Format Indicator Channel increases a designated value, and the value of Physical Control Format Indicator Channel after increasing is no more than the maximum of Physical Control Format Indicator Channel;
When residue control channel number of unit exceedes residue control channel cell gate in limited time, the value of Physical Control Format Indicator Channel is reduced to adjustment number of symbols corresponding to this residue control channel unit thresholding;
When residue control channel number of unit is 0, and up guarantee bit rate meets rate lower than speed thresholding, and when descending guarantee bit rate meets rate and is not less than speed thresholding, keep the value of Physical Control Format Indicator Channel constant, promote the reserved ratio in ascending control channel unit;
Or, when residue control channel number of unit is 0, and descending guarantee bit rate is lower than speed thresholding, and up guarantee bit rate is while being not less than speed thresholding, keep the value of Physical Control Format Indicator Channel constant, promote the reserved ratio in down control channel unit.
Above embodiment is just in order to help to illustrate using method of the present invention, and it does not limit the scope of application of the present invention; In practical application, in concrete detailed rules for the implementation and the scope of application, may change to some extent.The definite method of semi-static CFI value that the present invention provides taking the balance between control channel resource and traffic channel resource as target all should be considered as protection scope of the present invention.
Claims (8)
1. a method of adjusting Physical Control Format Indicator Channel value, is characterized in that, comprising:
Obtain statistical information, described statistical information comprise following one or more: control channel resource information, service resources information and Traffic Channel quality of service information;
Adjust the value of Physical Control Format Indicator Channel according to described statistical information; The wherein said step according to the value of statistical information adjustment Physical Control Format Indicator Channel comprises:
When residue control channel number of unit be 0 and uplink and downlink ensure that bit rate meets rate and all meets ratio thresholding lower than speed, and surplus lines resource exceedes surplus lines resource thresholding, the value of Physical Control Format Indicator Channel increases a designated value, and the value of Physical Control Format Indicator Channel after increasing is no more than the maximum of Physical Control Format Indicator Channel;
When residue control channel number of unit exceedes residue control channel cell gate in limited time, the value of Physical Control Format Indicator Channel is reduced to adjustment number of symbols corresponding to this residue control channel unit thresholding.
2. the method for claim 1, is characterized in that, described in periodically carrying out, obtains statistical information, adjusts the step of the value of Physical Control Format Indicator Channel according to statistical information.
3. the method for claim 1, it is characterized in that, described control channel resource information comprises the level and smooth information of residue control channel number of unit, described service resources information comprises: the level and smooth information of surplus lines number of resources, described Traffic Channel quality of service information comprises: up guarantee bit rate meets the level and smooth information of rate and/or descending guarantee bit rate meets the level and smooth information of rate.
4. the method as described in as arbitrary in claims 1 to 3, is characterized in that, the step of the value of described adjustment Physical Control Format Indicator Channel comprises:
When residue control channel number of unit is 0, and up guarantee bit rate meets rate and meets ratio thresholding lower than speed, and when descending guarantee bit rate meets rate and is not less than speed and meets ratio thresholding, keep the value of Physical Control Format Indicator Channel constant, promote the reserved ratio in ascending control channel unit;
Or, when residue control channel number of unit is 0, and descending guarantee bit rate meets rate and meets ratio thresholding lower than speed, and when up guarantee bit rate meets rate and is not less than speed and meets ratio thresholding, keep the value of Physical Control Format Indicator Channel constant, promote the reserved ratio in down control channel unit.
5. a device of adjusting Physical Control Format Indicator Channel value, is characterized in that, described device comprises information acquisition unit and adjustment unit, wherein:
Described information acquisition unit is used for: obtain statistical information, described statistical information comprise following one or more: control channel resource information, service resources information and Traffic Channel quality of service information;
Described adjustment unit is used for: the value of adjusting Physical Control Format Indicator Channel according to described statistical information; When residue control channel number of unit be 0 and uplink and downlink ensure that bit rate meets rate and all meets ratio thresholding lower than speed, and surplus lines resource exceedes surplus lines resource thresholding, the value of Physical Control Format Indicator Channel increases a designated value, and the value of Physical Control Format Indicator Channel after increasing is no more than the maximum of Physical Control Format Indicator Channel; When residue control channel number of unit exceedes residue control channel cell gate in limited time, the value of Physical Control Format Indicator Channel is reduced to adjustment number of symbols corresponding to this residue control channel unit thresholding.
6. device as claimed in claim 5, is characterized in that, described information acquisition unit is that described adjustment unit is the value for periodically adjusting described Physical Control Format Indicator Channel for periodically obtaining statistical information.
7. device as claimed in claim 5, it is characterized in that, described control channel resource information comprises the level and smooth information of residue control channel number of unit, described service resources information comprises: the level and smooth information of surplus lines number of resources, described Traffic Channel quality of service information comprises: up guarantee bit rate meets the level and smooth information of rate and/or descending guarantee bit rate meets the level and smooth information of rate.
8. the device as described in as arbitrary in claim 5 to 7, is characterized in that, described adjustment unit be for:
When residue control channel number of unit is 0, and up guarantee bit rate meets rate and meets ratio thresholding lower than speed, and when descending guarantee bit rate meets rate and is not less than speed and meets ratio thresholding, keep the value of Physical Control Format Indicator Channel constant, promote the reserved ratio in ascending control channel unit;
Or, when residue control channel number of unit is 0, and descending guarantee bit rate meets rate and meets ratio thresholding lower than speed, and when up guarantee bit rate meets rate and is not less than speed and meets ratio thresholding, keep the value of Physical Control Format Indicator Channel constant, promote the reserved ratio in down control channel unit.
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| CN102448179B (en) * | 2012-01-18 | 2014-06-11 | 中兴通讯股份有限公司 | Resource distribution method and eNodeB (evolved Node B) |
| CN102905375A (en) * | 2012-10-23 | 2013-01-30 | 张家港市鸿嘉数字科技有限公司 | Resource allocation device |
| CN108337731B (en) * | 2017-01-19 | 2020-06-16 | 大唐移动通信设备有限公司 | Method and device for controlling format indication adjustment |
| CN107124772B (en) * | 2017-04-11 | 2020-02-18 | 京信通信***（中国）有限公司 | Resource scheduling method and device |
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| CN101237311A (en) * | 2008-02-29 | 2008-08-06 | 中兴通讯股份有限公司 | Transmission method and device for uplink and downlink proportional information in time division duplex system |
| CN101309523A (en) * | 2008-06-23 | 2008-11-19 | 中兴通讯股份有限公司 | Method for transmitting physical downlink channel control signal |
| CN101754288A (en) * | 2008-12-16 | 2010-06-23 | 中兴通讯股份有限公司 | Method for dynamically allocating downlink resources of an orthogonal frequency division multiplexing system |
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| WO2009078628A1 (en) * | 2007-12-14 | 2009-06-25 | Lg Electronics Inc. | Method for mapping control channels |
| KR101227740B1 (en) * | 2008-10-01 | 2013-01-29 | 엘지전자 주식회사 | Method and device for wireless subframe resource allocation |
| KR101319626B1 (en) * | 2008-12-23 | 2013-10-29 | 에릭슨 엘지 주식회사 | Mobile telecommunication system and method for transmitting forward link control information |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101237311A (en) * | 2008-02-29 | 2008-08-06 | 中兴通讯股份有限公司 | Transmission method and device for uplink and downlink proportional information in time division duplex system |
| CN101309523A (en) * | 2008-06-23 | 2008-11-19 | 中兴通讯股份有限公司 | Method for transmitting physical downlink channel control signal |
| CN101754288A (en) * | 2008-12-16 | 2010-06-23 | 中兴通讯股份有限公司 | Method for dynamically allocating downlink resources of an orthogonal frequency division multiplexing system |
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