CN108574553B - Method and device for controlling channel self-adaption - Google Patents

Method and device for controlling channel self-adaption Download PDF

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CN108574553B
CN108574553B CN201710139994.9A CN201710139994A CN108574553B CN 108574553 B CN108574553 B CN 108574553B CN 201710139994 A CN201710139994 A CN 201710139994A CN 108574553 B CN108574553 B CN 108574553B
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cce
bler
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polymerization
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CN108574553A (en
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姚春峰
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • H04L1/001—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding applied to control information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/006—Quality of the received signal, e.g. BER, SNR, water filling

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Abstract

The invention discloses a method and a device for controlling channel self-adaptation, belonging to the technical field of communication. The method comprises the following steps: selecting two different initial CCEs for controlling the polymerization degree grade of the channel unit according to the channel quality information fed back by the User Equipment (UE)1And CCE2(ii) a The CCE is paired according to a preset scheduling pattern1And CCE2Scheduling is carried out; respectively calculating the CCE after scheduling1And CCE2Generated block error rate BLER1、BLER2(ii) a According to the BLER1And the BLER2Adjusting the CCE by the difference value of1And CCE2Degree of polymerization of (c). By adopting the invention, the control channel is adjusted through the error rate difference generated by scheduling with different polymerization degrees, so that the self-adaptive result is more accurate, and the system throughput is effectively improved while the control channel performance is ensured.

Description

Method and device for controlling channel self-adaption
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for controlling channel adaptation.
Background
In a frame structure of a Long Term Evolution (LTE) downlink system, a first number of symbols are used to transmit a control channel, and the remaining symbols are used to transmit a traffic channel. The occupation of the control channel directly affects the performance of the service channel, i.e. the fewer the symbols occupied by the control channel, the better the performance of the service channel; on the other hand, different User Equipments (UEs) have different Channel qualities, and the LTE protocol specifies a plurality of Control Channel Element (CCE) aggregation levels to ensure the Control Channel performance. For the UE with better channel quality, the performance of the control channel can be ensured by using a lower CCE aggregation level, and for the UE with poorer channel quality, the performance of the control channel can be ensured by using a higher CCE aggregation level. Therefore, the CCE polymerization degree is reasonably selected according to the channel quality of the UE, the number of symbols occupied by the control channel can be reduced as much as possible on the premise of ensuring the performance of the control channel, and the performance of the service channel is improved.
In the prior art, a Block Error Rate (BLER) mode of a control channel is adopted for self-adaptation, that is, when the BLER of the control channel is greater than a threshold, the CCE polymerization degree is increased; and when the BLER of the control channel is smaller than the threshold, reducing the CCE polymerization degree, wherein the BLER is obtained according to the feedback of the UE. However, in the LTE system, especially in the LTE Time Division Duplex (TDD) system, there is a lot of feedback ambiguity, i.e. from the feedback information of the UE, the base station cannot distinguish whether the error code is generated by the control channel or the traffic channel, which results in the performance degradation of the adaptive algorithm.
Therefore, it is necessary to provide a method and an apparatus for controlling channel adaptation to solve the problem of inaccurate result of the control channel adaptation algorithm in the prior art.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a method and an apparatus for controlling channel adaptation, which aim to solve the problem of inaccurate result of the control channel adaptation algorithm in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows:
according to a first aspect of the present invention, there is provided a control channel adaptation method, the method comprising the steps of:
selecting two different initial CCEs for controlling the polymerization degree grade of the channel unit according to the channel quality information fed back by the User Equipment (UE)1And CCE2；
The CCE is paired according to a preset scheduling pattern1And CCE2Scheduling is carried out;
respectively calculating the CCE after scheduling1And CCE2Generated block error rate BLER1、BLER2；
According to the BLER1And said BLER2Adjusting the CCE by the difference value of1And CCE2Degree of polymerization of (c).
Optionally, the separately calculating the scheduled CCE1And CCE2Generated block error rate BLER1、BLER2The method comprises the following steps:
respectively counting the CCE of the UE after scheduling1And CCE2The feedback result of (1);
judging the CCE1And CCE2Whether the statistics of the feedback result of (1) are all larger than a preset threshold value or not;
if the CCE is larger than the preset threshold, calculating and respectively calculating the CCE after scheduling according to the statistical feedback result1And CCE2Generated block error rate BLER1、BLER2。
Optionally, the CCE2Is superior to the CCE1The performance of (c).
Optionally, the block error rate (BLER) is determined according to the block error rate (BLER)1And the BLER2Adjusting the CCE by the difference value of1And CCE2A degree of polymerization grade of (a), comprising:
if the difference value is larger than a preset threshold value, adjusting the CCE1And CCE2The polymerization degree grade of (2) is increased by one step;
if the difference value is smaller than a preset threshold value, adjusting the CCE1And CCE2The degree of polymerization of (a) is decreased by one step.
Optionally, the preset scheduling pattern includes:
CCE1 CCE2，CCE1 CCE2…, respectively; or
CCE1…CCE1 CCE2…CCE2，CCE1…CCE1 CCE2…CCE2…, respectively; or
CCE1 CCE2，CCE2 CCE1，CCE1 CCE2，CCE2 CCE1…。
According to a second aspect of the present invention, there is provided an apparatus for controlling channel adaptation, the apparatus comprising:
a selection module for selecting two different initial CCE values for controlling the aggregation level of the channel module according to the channel quality information fed back by the user equipment UE1And CCE2；
A scheduling module for scheduling the CCE according to a preset scheduling pattern1And CCE2Scheduling is carried out;
a calculation module for calculating the scheduled CCEs respectively1And CCE2Generated block error rate BLER1、BLER2；
An adjustment module for adjusting the BLER according to the BLER1And the BLER2Adjusting the CCE by the difference value of1And CCE2Degree of polymerization of (c).
Optionally, the calculation module includes:
a statistic submodule for respectively counting the CCE of the UE after scheduling1And CCE2The feedback result of (1);
a judging submodule for judging the CCE1And CCE2Whether the statistics of the feedback result of (1) are all larger than a preset threshold value or not;
a computation submodule for computing at the CCE1And CCE2When the statistics of the feedback results are all larger than the preset threshold value, the CCE after scheduling is calculated and respectively calculated according to the feedback results of statistics1And CCE2Generated block error rate BLER1、BLER2。
Optionally, the CCE1Is superior to the CCE2。
Optionally, the adjusting module is further configured to adjust the CCE when the difference is greater than a preset threshold1And CCE2The degree of polymerization of (c) is increased by one step, or is further used for adjusting the CCE when the difference is smaller than a preset threshold value1And CCE2The degree of polymerization of (a) is decreased by one step.
Optionally, the preset scheduling pattern includes:
CCE1 CCE2，CCE1 CCE2…, respectively; or
CCE1…CCE1 CCE2…CCE2，CCE1…CCE1 CCE2…CCE2…, respectively; or
CCE1 CCE2，CCE2 CCE1，CCE1 CCE2，CCE2 CCE1…。
The control channel self-adaption method and the control channel self-adaption device of the embodiment of the invention adjust the control channel through the error rate difference generated by scheduling with different polymerization degrees, so that the self-adaption result is more accurate, and the system throughput is effectively improved while the performance of the control channel is ensured.
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Fig. 1 is a flowchart of a method for controlling channel adaptation according to an embodiment of the present invention;
fig. 2 is a flowchart of another method for controlling channel adaptation according to a second embodiment of the present invention;
fig. 3 is a schematic block diagram of a device for controlling channel adaptation according to a third embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
A mobile terminal implementing various embodiments of the present invention will now be described with reference to the accompanying drawings. In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in themselves. Thus, "module" and "component" may be used in a mixture.
Referring to fig. 1, a method for controlling channel adaptation according to an embodiment of the present invention includes:
s101, selecting two different initial CCEs (control channel elements) for controlling the polymerization degree grade of the channel unit according to channel quality information fed back by User Equipment (UE)1And CCE2；
S102, carrying out control over the CCE according to a preset scheduling pattern1And CCE2Scheduling is carried out;
s103, respectively calculating the CCE after scheduling1And CCE2Generated block error rate BLER1、BLER2；
S104, according to the BLER1And the BLER2Adjusting the CCE by the difference1And CCE2Degree of polymerization of (c).
In practical applications, the preset scheduling pattern may have various options, such as:
1)CCE1 CCE2，CCE1 CCE2…；
2)CCE1…CCE1 CCE2…CCE2，CCE1…CCE1 CCE2…CCE2…；
3)CCE1 CCE2，CCE2 CCE1，CCE1 CCE2，CCE2 CCE1…
in an optional scheme, step S103, separately calculating the scheduled CCEs1And CCE2Generated block error rate BLER1、BLER2The method comprises the following steps:
respectively counting the CCE of the UE after scheduling1And the CCE2The feedback result of (1);
judging the CCE1And the CCE2Whether the statistics of the feedback result of (1) are all larger than a preset threshold value or not;
if the CCE is larger than the preset threshold, the CCE after scheduling is calculated and respectively calculated according to the feedback result of statistics1And CCE2Generated block error rate BLER1、BLER2。
In an alternative scheme, when the initial value of the aggregation level of the channel elements is controlled, the CCE may be used2Has better performance than the CCE1。
In this case, step S104 is to determine the BLER based on the BLER1And the BLER2Adjusting the CCE by the difference1And CCE2A degree of polymerization grade of (a), comprising:
if the difference is larger than the preset threshold value, the CCE is adjusted1And CCE2The polymerization degree grade of (2) is increased by one step;
if the difference is smaller than a preset threshold value, the CCE is adjusted1And CCE2The degree of polymerization of (a) is decreased by one step.
In an optional aspect, the method further comprises:
presetting a preset threshold value of the statistic as 100, wherein the BLER1And the BLER2The preset threshold for the difference value of (a) is 2%.
In practical application, due to the existence of feedback ambiguity, the base station cannot distinguish error codes generated by a control channel and a service channel, and due to CCE2Has higher polymerization degree grade and better control channel performance, so the BLER2BLER or less1. Therefore, BLER1-BLER2The difference value of (c) is the CCE1And CCE2And generating a difference value of the error codes, wherein if the difference value is large, the error code generated by the control channel is large, the CCE grade needs to be increased, and if the difference value is small, the error code generated by the control channel is small, and the CCE grade can be reduced.
The control channel self-adaption method of the embodiment adjusts the control channel through the error rate difference generated by scheduling of different polymerization degrees, so that the self-adaption result is more accurate, and the system throughput is effectively improved while the control channel performance is ensured.
On the basis of the above embodiments, the second embodiment of the present invention provides another control channel adaptation method. In this embodiment, the preset threshold of the statistic is set to 100 in advance, and the BLER1And BLER2With reference to fig. 2, the preset threshold of the difference value is 2%, and the method flow includes:
s201, selecting CCE according to channel quality information fed back by UE1Degree of polymerization ofLevel 2CCE, CCE is selected2With a degree of aggregation of 4 CCEs.
And S202, scheduling according to a preset scheduling pattern.
S203, counting the used CCE1And CCE2And (5) feeding back a scheduling result.
S204, determining CCE1And CCE2And (4) whether the statistics of the feedback result of the scheduling reach 100 times, if so, executing step S205, otherwise, executing step S203.
S205, determining CCE according to statistical feedback result1And CCE2The generated error code is calculated, and BLER is calculated respectively1And BLER2。
S206, calculating BLER1-BLER2The difference of (a).
S207, judging BLER1-BLER2If the difference is greater than 2%, step S208 is executed, otherwise step S209 is executed.
S208, CCE1And CCE2The degree of polymerization of (a) is increased by one step.
S209, CCE1And CCE2The degree of polymerization of (a) is decreased by one step.
For example, in one possible scenario, the following scheduling pattern may be selected for scheduling: CCE1…CCE1CCE2…CCE2，CCE1…CCE1 CCE2…CCE2…, statistical use of CCE1And CCE2The feedback results of the scheduling are respectively 100 times, if the error code is respectively 10 times and 10 times, the BLER is respectively obtained by calculation110% BLER2The content was 10%. At this time, BLER1-BLER2＝10％-10％＝0％<2% so CCE1And CCE2One step down in the aggregation level of (C), i.e. CCE1Adjusted to 1CCE2Adjusted to 2 CCE.
In another possible solution, the following scheduling pattern may be selected for scheduling: CCE1 CCE2，CCE1CCE2…, statistical use of CCE1And CCE2The feedback results of the scheduling are respectively 100 times, if the error code is respectively 10 times and 0 time, the BLER is respectively obtained by calculation110% BLER2Is 0%, in this case, BLER1-BLER2＝10％-0％＝10％>2% so CCE1And CCE2The degree of aggregation of (c) is raised by one step, i.e. CCE1Adjusted to 4CCE2Adjusted to 8 CCEs.
The control channel self-adaption method of the embodiment adjusts the control channel through the error rate difference generated by scheduling of different polymerization degrees, so that the self-adaption result is more accurate, and the system throughput is effectively improved while the control channel performance is ensured.
On the basis of the foregoing embodiments, a third embodiment of the present invention provides an apparatus for controlling channel adaptation, referring to fig. 3, the apparatus including:
a selecting module 301, configured to select two different initial values CCE for controlling the aggregation level of the channel modules according to channel quality information fed back by the UE1And CCE2；
A scheduling module 302 for scheduling the CCE according to a predetermined scheduling pattern1And CCE2Scheduling is carried out;
a calculating module 303, configured to calculate the scheduled CCEs respectively1And CCE2Generated block error rate BLER1、BLER2；
An adjusting module 304 for adjusting the BLER according to1And the BLER2Adjusting the CCE by the difference1And CCE2Degree of polymerization of (c).
In practical applications, the preset scheduling pattern may have various options, such as:
1)CCE1 CCE2，CCE1 CCE2…；
2)CCE1…CCE1 CCE2…CCE2，CCE1…CCE1 CCE2…CCE2…；
3)CCE1 CCE2，CCE2 CCE1，CCE1 CCE2，CCE2 CCE1…
in one possible implementation, the calculating module 303 includes:
a statistic submodule for respectively counting the CCE of the scheduled UE1And the CCE2The feedback result of (1);
a judging submodule for judging the CCE1And the CCE2Whether the statistics of the feedback result of (1) are all larger than a preset threshold value or not;
a calculation submodule for calculating the CCE1And the CCE2When the statistics of the feedback results are all larger than the preset threshold value, the CCE after scheduling is calculated and respectively calculated according to the feedback results of statistics1And CCE2Generated block error rate BLER1、BLER2。
In one possible approach, the CCE1Has better performance than the CCE2The performance of (c).
In a possible implementation, the adjusting module 304 is further configured to adjust the CCE when the difference is greater than a predetermined threshold1And CCE2The aggregation level of (c) is increased by one step, or is further used for adjusting the CCE when the difference is smaller than a preset threshold value1And CCE2The degree of polymerization of (a) is decreased by one step.
In one possible implementation, the apparatus further includes:
a setting module for presetting the preset threshold of the statistic as 100, the BLER1And the BLER2The preset threshold for the difference value of (a) is 2%.
The device for controlling channel self-adaptation of the embodiment adjusts the control channel according to the error rate difference generated by scheduling with different polymerization degrees, so that the self-adaptation result is more accurate, and the system throughput is effectively improved while the performance of the control channel is ensured.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, and are not to be construed as limiting the scope of the invention. Any modifications, equivalents and improvements which may occur to those skilled in the art without departing from the scope and spirit of the present invention are intended to be within the scope of the claims.

Claims (8)

1. A method for controlling channel adaptation, the method comprising the steps of:
selecting two different initial CCEs for controlling the polymerization degree grade of the channel unit according to the channel quality information fed back by the User Equipment (UE)1And CCE2；
The CCE is paired according to a preset scheduling pattern1And CCE2Scheduling is carried out;
respectively calculating the CCE after scheduling1And CCE2Generated block error rate BLER1、BLER2；
According to the BLER1And the BLER2Adjusting the CCE by the difference value of1And CCE2The polymerization degree grades specifically include:
if the difference value is larger than a preset threshold value, adjusting the CCE1And CCE2The polymerization degree grade of (2) is increased by one step;
if the difference value is smaller than a preset threshold value, adjusting the CCE1And CCE2The degree of polymerization of (a) is decreased by one step.
2. The method of claim 1, wherein the separately calculating the scheduled CCEs is performed1And CCE2Generated block error rate BLER1、BLER2The method comprises the following steps:
respectively counting the CCE of the UE after scheduling1And CCE2The feedback result of (1);
judging the CCE1And CCE2Whether the statistics of the feedback result of (1) are all larger than a preset threshold value or not;
if the CCE is larger than the preset threshold, calculating and respectively calculating the CCE after scheduling according to the statistical feedback result1And CCE2Generated block error rate BLER1、BLER2。
3. The method of claim 1 or 2, wherein the CCEs2Is superior to the CCE1The performance of (c).
4. The method of claim 1, wherein the preset scheduling pattern comprises:
CCE1CCE2，CCE1CCE2…, respectively; or
CCE1…CCE1CCE2…CCE2，CCE1…CCE1CCE2…CCE2…, respectively; or
CCE1CCE2，CCE2CCE1，CCE1CCE2，CCE2CCE1…。
5. An apparatus for controlling channel adaptation, the apparatus comprising:
a selection module for selecting two different initial CCE values for controlling the aggregation level of the channel module according to the channel quality information fed back by the user equipment UE1And CCE2；
A scheduling module for scheduling the CCE according to a preset scheduling pattern1And CCE2Scheduling is carried out;
a calculation module for calculating the scheduled CCEs respectively1And CCE2Generated block error rate BLER1、BLER2；
An adjustment module for adjusting the BLER according to the BLER1And the BLER2Adjusting the CCE by the difference value of1And CCE2The polymerization degree grade of (a) is specifically: when the difference value is larger than a preset threshold value, adjusting the CCE1And CCE2The degree of polymerization of (c) is increased by one step, or is further used for adjusting the CCE when the difference is smaller than a preset threshold value1And CCE2The degree of polymerization of (a) is decreased by one step.
6. The apparatus of claim 5, wherein the computing module comprises:
a statistic submodule for respectively counting the CCE of the UE after scheduling1And CCE2The feedback result of (1);
a judging submodule for judging the CCE1And CCE2Whether the statistics of the feedback result of (1) are all larger than a preset threshold value or not;
a computation submodule for computing at the CCE1And CCE2When the statistics of the feedback results are all larger than the preset threshold value, the CCE after scheduling is calculated and respectively calculated according to the feedback results of statistics1And CCE2Generated block error rate BLER1、BLER2。
7. The apparatus of claim 5 or 6, wherein the CCE is configured as1Is superior to the CCE2。
8. The apparatus of claim 5, wherein the preset scheduling pattern comprises:
CCE1CCE2，CCE1CCE2…, respectively; or
CCE1…CCE1CCE2…CCE2，CCE1…CCE1CCE2…CCE2…, respectively; or
CCE1CCE2，CCE2CCE1，CCE1CCE2，CCE2CCE1…。
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