CN111628852B - Resource allocation method and device - Google Patents

Resource allocation method and device Download PDF

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CN111628852B
CN111628852B CN201910147292.4A CN201910147292A CN111628852B CN 111628852 B CN111628852 B CN 111628852B CN 201910147292 A CN201910147292 A CN 201910147292A CN 111628852 B CN111628852 B CN 111628852B
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cfi
current frame
cfi value
pdcch resource
value
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CN111628852A (en
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乔瞳
常璐
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Datang Mobile Communications Equipment Co Ltd
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Datang Mobile Communications Equipment Co Ltd
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    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management

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  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the invention provides a method and a device for resource allocation, wherein the method comprises the following steps: judging whether the control format indicates that the CFI adaptive function is started or not, if so, acquiring the system and bandwidth of the current cell; setting the value range of the CFI value according to the standard and the bandwidth of the current cell; the system comprises a frequency division duplex FDD system or a time division duplex TDD system; and self-adaptive adjustment is carried out on the CFI value of the current frame type according to the CCE occupancy rate of the control channel unit of the current frame, the PDCCH resource limitation judgment down-regulation threshold and the PDCCH resource limitation judgment up-regulation threshold, wherein the adjusted CFI value does not exceed the CFI value range. The embodiment of the invention can dynamically adjust the CFI value according to the cell system so as to improve the resource utilization rate.

Description

Resource allocation method and device
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for resource allocation.
Background
When an LTE (Long Term Evolution ) system schedules transmission, it needs to indicate related resource allocation, modulation and coding scheme, etc. through a PDCCH (Physical Downlink Control CHannel).
In an LTE system, a method for an eNodeB (Evolved Node B) to adaptively allocate resources according to a CFI (Control format indicator) includes: the eNodeB calculates a CFI value when performing subframe initialization for each scheduling, with 1ms as a scheduling unit, determines CCE (Control Channel Element) resources allocated to a Control Channel in the current system bandwidth according to the CFI value, and allocates CCE resources to uplink and downlink Control channels according to a preset uplink and downlink CCE ratio.
However, for FDD (Frequency Division Duplex) system, cell configuration with various bandwidths of 5M, 10M, 15M, and 20M may occur, and when the CFI value is 1, a random access failure in the 5M cell may occur, which may cause that a physical downlink control channel in the FDD system cannot adaptively allocate resources according to the CFI, thereby causing a low resource utilization rate.
Disclosure of Invention
The embodiment of the invention provides a method and a device for resource allocation, which can dynamically adjust a CFI value according to a cell type so as to improve the resource utilization rate.
The embodiment of the invention provides a resource allocation method, which comprises the following steps:
judging whether the control format indicates that the CFI adaptive function is started or not, if so, acquiring the system and bandwidth of the current cell;
setting the value range of the CFI value according to the standard and the bandwidth of the current cell; the system comprises a frequency division duplex FDD system or a time division duplex TDD system;
and self-adaptive adjustment is carried out on the CFI value of the current frame type according to the CCE occupancy rate of the control channel unit of the current frame, the PDCCH resource limitation judgment down-regulation threshold and the PDCCH resource limitation judgment up-regulation threshold, wherein the adjusted CFI value does not exceed the CFI value range.
The embodiment of the invention provides a device for allocating resources, which comprises:
the mode judging module is used for judging whether the control format indicates that the CFI self-adaptive function is started or not, and if so, acquiring the system and the bandwidth of the current cell;
the range setting module is used for setting the value range of the CFI value according to the system and the bandwidth of the current cell; the system comprises a frequency division duplex FDD system or a time division duplex TDD system;
and the dynamic adjusting module is used for adaptively adjusting the CFI value of the current frame type according to the CCE occupancy rate of the control channel unit of the current frame, the PDCCH resource limitation judgment down-regulation threshold and the PDCCH resource limitation judgment up-regulation threshold, wherein the adjusted CFI value does not exceed the CFI value range.
The embodiment of the invention has the following advantages:
in the embodiment of the invention, under the condition that the control format indicates that the CFI adaptive function is started, the value range of the CFI value can be set according to the system and the bandwidth of the current cell, and the CFI value of the current frame type is adaptively adjusted according to the CCE occupancy rate of the control channel unit of the current frame, the PDCCH resource limitation judgment down-regulation threshold of the physical downlink control channel and the PDCCH resource limitation judgment up-regulation threshold of the current frame, wherein the system can comprise a frequency division duplex FDD system or a time division duplex TDD system, and the adjusted CFI value does not exceed the value range of the CFI. Therefore, the embodiment of the invention can set different CFI value ranges according to cells of different systems and carry out dynamic self-adaptive adjustment on the CFI value, so that the physical downlink control channel in an FDD system or a TDD system can self-adaptively allocate resources according to the CFI, and the resource utilization rate is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a flow chart of a first embodiment of a method for resource allocation according to the present invention;
FIG. 2 is a flow chart of a second embodiment of a method for resource allocation according to the present invention;
FIG. 3 is a flow chart of a third embodiment of a method for resource allocation according to the present invention;
fig. 4 shows a block diagram of an embodiment of the resource allocation apparatus of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Method embodiment one
Referring to fig. 1, a flowchart of a first embodiment of a method for resource allocation according to the present invention is shown, where the method specifically includes:
step 101, judging whether a control format indicates that a CFI adaptive function is started, if so, acquiring the system and bandwidth of the current cell;
102, setting a value range of a CFI (computational fluid interface) value according to the system and the bandwidth of the current cell; the system comprises a frequency division duplex FDD system or a time division duplex TDD system;
step 103, performing adaptive adjustment on the CFI value of the current frame type according to the CCE occupancy rate of the control channel unit of the current frame, the PDCCH resource limitation judgment down-regulation threshold and the PDCCH resource limitation judgment up-regulation threshold, wherein the adjusted CFI value does not exceed the CFI value range.
The embodiment of the present invention may be applied to a base station device in a mobile communication network, where the mobile communication network may specifically include a 3G (3rd-Generation, third Generation mobile communication technology) network, a 4G (the 4th Generation mobile communication technology, third Generation mobile communication technology) network, a 5G (5th Generation, fifth Generation mobile communication technology) network, and the like.
In the embodiment of the present invention, it may be first determined whether the control format indicates that the CFI adaptive function is activated, if so, the control format and the bandwidth of the current cell may be obtained to perform adaptive control on the CFI value according to the control format and the bandwidth of the current cell, and if the CFI adaptive function is not activated, the current CFI configuration of the base station may be adopted, and the CFI adaptive control procedure may be exited.
In an optional embodiment of the present invention, the setting of the value range of the CFI value according to the standard and the bandwidth of the current cell specifically may include:
if the mode of the current cell is a Frequency Division Duplex (FDD) mode and the bandwidth of the current cell is a first bandwidth, setting the value range of the CFI value as a first value range; or
If the mode of the current cell is a Frequency Division Duplex (FDD) mode and the bandwidth of the current cell is a second bandwidth, setting the value range of the CFI value as a second value range; or
And if the mode of the current cell is a Time Division Duplex (TDD) mode, setting the value range of the CFI value as a third value range.
In a specific application, the FDD scheme is different from the TDD (Time Division Duplex) scheme, and has cell configurations with various conventional bandwidths of 5M, 10M, 15M and 20M. When the CCE aggregation level of the 5M cell is 4 or 8, if the CFI value is 1, a situation that random access in the 5M cell fails may occur, and if the CFI value of the 5M cell is fixedly set to 3, success of random access may be guaranteed, but if the CFI value is fixed, a physical downlink control channel in an FDD system cannot adaptively allocate resources according to the CFI, which may cause a waste of bandwidth resources and a maximization of resource utilization.
In order to solve the above problem, the embodiment of the present invention may first determine the system of the current cell, and if the system of the current cell is FDD, further determine the bandwidth of the cell, and set different CFI value ranges according to the bandwidth.
In an optional embodiment of the present invention, the first bandwidth is 5M, and the first value range is: a CFI value greater than or equal to 2 and less than or equal to 3; the second bandwidth comprises any one of: 10M, 15M, 20M, the second value range is: the CFI value is greater than or equal to 1 and less than or equal to 3.
Specifically, if the system of the current cell is FDD and the bandwidth is the first bandwidth, the value range of the CFI value may be set to be the first value range. For example, if the first bandwidth may be 5M, the first value range may be [2, Max ], where Max may be 3.
If the standard of the current cell is FDD and the bandwidth is the second bandwidth, the value range of the CFI value can be set as the second value range. For example, the second bandwidth may include: and if the bandwidths of 10M, 15M, 20M, and the like are greater than 5M, the second value range may be [1, Max ].
And if the standard of the current cell is TDD, setting the value range of the CFI value as a third value range. In a specific application, since the TDD scheme does not have a cell configuration with a 5M bandwidth, the third value range may be [1, Max ].
It can be understood that the above-mentioned manner of setting the value range of the CFI is only an application example of the present invention, and in practical applications, a person skilled in the art can flexibly set the value range of the CFI according to practical situations.
Then, the CFI value of the current frame type may be adaptively adjusted according to the CCE occupancy rate of the current frame, the PDCCH resource restriction determination down-regulation threshold of the physical downlink control channel, and the PDCCH resource restriction determination up-regulation threshold, and the adjusted CFI value does not exceed the CFI value range.
The CCE occupancy rate refers to determining the available total number CCEnum and the occupied number CCEsum of the CCEs in the current subframe according to the CFI value acquired in real time, and further calculating the ratio of the CCEsum to the CCEnum to obtain the CCE occupancy rate.
The PDCCH (Physical Downlink Control Channel) resource limitation judgment down-regulation threshold refers to a maximum CCE occupancy rate that allows a CFI value to be adjusted, and allows CFI to be adjusted if the CCE occupancy rate is smaller than the maximum CCE occupancy rate, and does not allow the CFI value to be adjusted if the CCE occupancy rate is larger than the maximum CCE occupancy rate. This value may be configured at the base station and may be set to 0, indicating that the adjustment of the CFI value is not limited.
The PDCCH resource limitation judgment down-regulation threshold may be cceusiage th _ low [ max (CFI-2,0) ]. In a particular application, meaningful values of CFI may include: 1. 2 and 3. Thus, meaningful values that CFI can be down-regulated are 2 and 3. Through the formula, when the CFI value is 2, the PDCCH resource limitation judgment down-regulation threshold is 0, when the CFI value is 3, the PDCCH resource limitation judgment down-regulation threshold is 1, and when the CFI value is 1, the down-regulation is not performed, so that the CFI value can be prevented from being negative.
The PDCCH resource limitation judgment up-regulation threshold is used for judging whether the current CCE occupancy rate reaches the upper limit, if the current CCE occupancy rate is greater than the value, the current CCE occupancy rate is indicated to reach the upper limit, and if CCE occupancy rate is increased, the CCE occupancy rate can not be transmitted, and under the condition, the CFI value needs to be increased so that the CCE has resources to be transmitted.
The PDCCH resource limitation determination upper-adjustment threshold may be cceusiage th _ high [ min (CFI-1,1) ]. In a specific application, the meaningful values of the CFI that can be adjusted up are 1 and 2, and by the above formula, when the CFI value is 1, the PDCCH resource restriction judgment up-regulation threshold is 0, when the CFI value is 2, the PDCCH resource restriction judgment up-regulation threshold is 1, and when the CFI value is 3, the PDCCH resource restriction judgment up-regulation threshold is also 1, so that the CFI value can be prevented from being greater than 3.
In the embodiment of the invention, the setting of the PDCCH resource limitation judgment down-regulation threshold cceUsagTH _ low needs to meet the following conditions: CCE total number CCEnum x cceUsagTH _ high after CFI down-regulation > CCEnum x cceUsagTH _ low corresponds to the current CFI. Wherein cceusiage th _ high is a PDCCH resource limitation judgment up-regulation threshold, and cceusiage th _ low is a PDCCH resource limitation judgment down-regulation threshold.
The embodiment of the invention can determine the CCE occupancy rate of the current frame according to the CFI value acquired in real time, and dynamically and adaptively adjust the CFI value of the current frame type according to the CCE occupancy rate of the current frame, the PDCCH resource limitation judgment down-regulation threshold and the PDCCH resource limitation judgment up-regulation threshold.
In an optional embodiment of the present invention, the adaptively adjusting, according to the occupancy rate of the control channel element CCE of the current frame, the physical downlink control channel PDCCH resource limitation judgment down-regulation threshold, and the PDCCH resource limitation judgment up-regulation threshold, the CFI value of the current frame type may specifically include:
step S11, judging whether the CCE occupancy rate of the current frame exceeds the PDCCH resource limitation judgment down-regulation threshold;
step S12, if the CCE occupancy rate of the current frame does not exceed the PDCCH resource limitation judgment down-regulation threshold, judging whether the CCE occupancy rate of the current frame exceeds the PDCCH resource limitation judgment up-regulation threshold;
step S13, if the CCE occupancy rate of the current frame exceeds the PDCCH resource limitation judgment up-regulation threshold, restarting the CFI adaptive tuning timer of the current frame type, and up-regulating the CFI value of the current frame type, wherein the up-regulated CFI value does not exceed the CFI value range.
Specifically, first, the available total number CCEnum and the occupied number CCEsum of the CCEs in the current subframe may be determined according to the CFI value obtained in real time, and the CCE occupancy rate cfiocure _ CCH of the current frame is calculated as CCEsum/CCEnum.
Then, judging whether the CCE occupancy rate cfiOCURATE _ CCH of the current frame exceeds the PDCCH resource limitation judgment down-regulation threshold; the PDCCH resource limitation judgment down-regulation threshold may be cceusiage th _ low [ max (CFI-2,0) ].
If the CCE occupancy rate cfiOCURATE _ CCH of the current frame does not exceed the PDCCH resource limitation judgment down-regulation threshold, which indicates that the CFI value is allowed to be adjusted, whether the CCE occupancy rate of the current frame exceeds the PDCCH resource limitation judgment up-regulation threshold or not can be further judged, if the CCE occupancy rate of the current frame exceeds the PDCCH resource limitation judgment up-regulation threshold, which indicates that the CFI value needs to be increased at the moment, the CFI adaptive tuning timer of the current frame type is restarted, and the CFI value of the current frame type is up-regulated (added by 1).
Wherein, the CFI adaptive tuning timer cfiModTimer refers to a time of an adjustment window. And restarting the timer, namely counting the occupation condition of the new CCE resources in a new adjusting window again.
In an optional embodiment of the present invention, after the determining whether the CCE occupancy of the current frame exceeds the PDCCH resource restriction determination upturn threshold, the method may further include:
if the CCE occupancy rate of the current frame does not exceed the PDCCH resource limitation judgment up-regulation threshold, judging whether the CFI adaptive setting timer of the current frame type is overtime, if so, restarting the CFI adaptive setting timer of the current frame type, judging whether the PDCCH resource limitation times of the current frame type does not exceed the control channel limitation judgment threshold, if so, down-regulating the CFI value of the current frame type, and enabling the down-regulated CFI value not to exceed the CFI value range.
Specifically, if the CCE occupancy cfiocure _ CCH of the current frame does not exceed the PDCCH resource limitation judgment down-regulation threshold and does not exceed the PDCCH resource limitation judgment up-regulation threshold, it may be further determined whether the CFI adaptive tuning timer of the current frame type is overtime (greater than or equal to the CFI adaptive tuning period cfiModT), if so, the CFI adaptive tuning timer of the current frame type is restarted, and it is determined whether the PDCCH resource limitation number of the current frame type does not exceed the control channel limitation judgment threshold, if so, it is determined that the CFI value needs to be down-regulated at this time, that is, the CFI value of the current frame type may be reduced by 1.
In the embodiment of the invention, the CFI can be counted by adopting a fixed window statistical method according to the limited times cfiN _ CCH and subframe numbers NUM _ SUBSNF of the PDCCH resource of each subframe in the self-adaptive adjustment period cfiModT. The fixed window refers to a fixed time period, and may be set at the base station, for example, 40ms, that is, the cfiN _ CCH of each subframe is counted according to the subframe within 40 ms. The subframe number NUM _ SUBSNF refers to subframe numbers 0-9 of the FDD format.
If the PDCCH resource limited number of times cfiN _ CCH does not exceed the control channel limited decision threshold, that is, if cfiN _ CCH < ═ cfiTH1_ CCH × NUM _ SUBSNF, it is determined that the CFI value needs to be adjusted downward at this time, that is, the CFI value of the current frame type can be decreased by 1, where cfiTH1_ CCH × NUM _ SUBSNF is the control channel limited decision threshold, and cfiTH1_ CCH is the CFI downward adjustment proportion threshold. Generally, the CFI down-regulation ratio threshold may be set to 0%, that is, the PDCCH resources are not limited in the CFI adaptive adjustment period.
In an optional embodiment of the present invention, after the determining whether the CCE occupancy of the current frame exceeds the PDCCH resource restriction determination down-regulation threshold, the method may further include:
and if the CCE occupancy rate of the current frame exceeds the PDCCH resource limitation judgment down-regulation threshold, refusing to adjust the CFI value of the current frame type.
Specifically, if the CCE occupancy rate cfiocure _ CCH of the current frame exceeds the PDCCH resource limitation judgment down-regulation threshold, it indicates that the CCE occupancy rate cfiocure _ CCH of the current frame exceeds the maximum CCE occupancy rate that allows adjustment of the CFI value, and therefore, the resource of the current frame is limited, and adjustment of the CFI value of the current frame type is rejected.
In an optional embodiment of the present invention, if the standard of the current cell is an FDD standard, the current frame may specifically include: scheduling the conventional subframes by uplink and downlink simultaneously; if the format of the current cell is a TDD format, the current frame may specifically include: and scheduling the conventional subframe, scheduling the special subframe, scheduling the conventional subframe only in the downlink and scheduling the special subframe only in the downlink simultaneously.
The resource allocation method of the embodiment of the invention can be applied to an FDD system or a TDD system, wherein the uplink and downlink bandwidths of the FDD system are separated, PDCCH is a subframe which is simultaneously scheduled by uplink and downlink, and no special subframe exists.
Therefore, for the FDD system, if it is determined that the CFI value of the current frame type needs to be adjusted up according to the CCE occupancy of the current frame, the PDCCH resource restriction determination down-regulation threshold, and the PDCCH resource restriction determination up-regulation threshold, the CFI value of the subsequent "uplink and downlink simultaneous scheduling conventional subframe" may be updated to be +1 of the CFI value of the current subframe.
For the FDD system, if it is determined that the CFI value of the current frame type needs to be adjusted downward according to the CCE occupancy of the current frame, the PDCCH resource restriction determination downward adjustment threshold, and the PDCCH resource restriction determination upward adjustment threshold, the CFI value of the subsequent "uplink and downlink simultaneous scheduling conventional subframe" may be updated to max (CFI value-1, 1 of the current subframe), where max (CFI value-1, 1 of the current subframe) may be used to ensure that the updated CFI value is not less than the minimum value 1.
For the FDD scheme, the final updated CFI value is:
and currently, uplink and downlink simultaneous scheduling subframes comprise conventional subframes, and the updated CFI value is min (the current CFI value, the maximum symbol number of a control region when the PDCCH is sent to the uplink and the downlink).
For a TDD system, if the CFI value of the current frame type needs to be adjusted upwards according to the CCE occupancy rate of the current frame, the PDCCH resource limitation judgment down-regulation threshold and the PDCCH resource limitation judgment up-regulation threshold, judging the current frame type, and if the current frame is a special subframe, updating the CFI value of a subsequent special subframe to be min (the CFI value of the current subframe is +1, 2); if the current frame is the uplink and downlink simultaneous scheduling conventional subframe, updating the CFI value of the subsequent uplink and downlink simultaneous scheduling conventional subframe to be the CFI value +1 of the current subframe; and if the current frame is the downlink-only scheduling conventional subframe, updating the CFI value of the subsequent downlink-only scheduling conventional subframe to be +1 of the CFI value of the current subframe.
For a TDD system, if the CFI value of the current frame type needs to be adjusted downwards according to the CCE occupancy rate of the current frame, the PDCCH resource limitation judgment down-regulation threshold and the PDCCH resource limitation judgment up-regulation threshold, the current frame type is judged, and if the current frame is a special subframe, the CFI value of a subsequent special subframe is updated to be max (the CFI value of the current subframe is-1, 1); if the current frame is the uplink and downlink simultaneous scheduling conventional subframe, updating the CFI value of the subsequent uplink and downlink simultaneous scheduling conventional subframe to be max (the CFI value of the current subframe is-1, 1); and if the current frame is the downlink-only scheduling conventional subframe, updating the CFI value of the subsequent downlink-only scheduling conventional subframe to be max (the CFI value of the current subframe is-1, 1).
For TDD format, the final updated CFI value is:
(1) if the current is the uplink and downlink simultaneous scheduling subframe, the uplink and downlink simultaneous scheduling subframe comprises a conventional subframe and a special subframe, and the updated CFI value is min (the current CFI value, the maximum symbol number of a control region when the uplink and downlink send PDCCH);
(2) if the current subframe is a downlink-only scheduling subframe, the downlink-only scheduling subframe comprises a conventional subframe and a special subframe, and the updated CFI value is min (the current CFI value, the maximum symbol number of a control region when the PDCCH is transmitted downlink).
To sum up, in the embodiment of the present invention, under the condition that the control format indicates that the CFI adaptive function is turned on, a value range of a CFI value may be set according to a system and a bandwidth of the current cell, and the CFI value of the current frame type may be adaptively adjusted according to a CCE occupancy of the current frame, a PDCCH resource restriction determination down-regulation threshold of a physical downlink control channel, and a PDCCH resource restriction determination up-regulation threshold of the current frame, where the system may include a frequency division duplex FDD system or a time division duplex TDD system, and the adjusted CFI value does not exceed the value range of the CFI. Therefore, the embodiment of the invention can set different CFI value ranges according to cells of different systems and carry out dynamic self-adaptive adjustment on the CFI value, so that the physical downlink control channel in an FDD system or a TDD system can self-adaptively allocate resources according to the CFI, and the resource utilization rate is improved.
It should be noted that, for simplicity of description, the method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the illustrated order of acts, as some steps may occur in other orders or concurrently in accordance with the embodiments of the present invention. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred and that no particular act is required to implement the invention.
Method embodiment two
Referring to fig. 2, a flowchart of a second embodiment of the method for resource allocation according to the present invention is shown, and is applied to a cell base station of FDD system, where the method specifically includes:
step 201, judging whether a CFI self-adaptive function is started or not; if yes, go to step 202, otherwise go to step 215;
specifically, whether a CFI adaptive function is started or not is judged; if the base station is started, the subsequent process is executed, and if the base station is not started, the current configuration of the base station is adopted, and the process is exited.
Step 202, judging whether the FDD cell is a 5M cell; if yes, go to step 203, otherwise go to step 204;
considering that the CFI of a 5M cell user initially accesses in FDD mode may not be 1, otherwise, if the access fails, the CFI value of the 5M cell may not be 1. Therefore, whether the current accessed cell is a 5M cell is judged, and if yes, the minimum CFI value is set to be 2.
Step 203, setting the minimum value of CFI as 2; step 204 is executed;
step 204, calculating the CCE occupancy rate of the current frame;
specifically, the CCE occupancy rate cfiOCURATE _ CCH of the current frame is calculated, where cfiOCURATE _ CCH is CCEsum/CCEnum, where CCEnum is the total number of CCEs of the current CFI of the frame, and CCEsum is the number of occupied CCEs.
Step 205, judging whether the CCE occupancy rate of the current frame is higher than a PDCCH resource limitation judgment down-regulation threshold; if yes, go to step 214, otherwise go to step 206;
specifically, whether the current frame CCE occupancy rate cfiocure _ CCH is higher than the PDCCH resource limitation determination down-regulation threshold cceudragth _ low [ max (CFI-2,0) ], if so, the subframe PDCCH resource is considered to be limited, and the CFI value is still the CFI value of the frame, which is not allowed to be adjusted.
Step 206, counting the limited times of the PDCCH resources in the adjusting window according to the subframe number;
specifically, a fixed window statistical method may be adopted to count the number of times cfiN _ CCH and subframe number NUM _ SUBSNF that PDCCH resources are limited in the CFI adaptive adjustment period cfiModT.
Step 207, judging whether the occupancy rate of the CCE of the current frame is higher than a PDCCH resource limitation judgment up-regulation threshold; if yes, go to step 208, otherwise go to step 209;
specifically, whether the CCE occupancy rate cfiOCURATE _ CCH of the current frame exceeds the PDCCH resource limitation judgment upper adjustment threshold cceUsagTH _ high [ min (CFI-1,1) ], if yes, the CFI adaptive setting timer cfiModtimer of the current frame type is restarted, and meanwhile, the CFI needs to be increased.
Step 208, adjusting CFI, and restarting the adjustment timer;
and if the current subframe is the uplink and downlink simultaneous scheduling conventional subframe, the updated CFI (the uplink and downlink simultaneous scheduling conventional subframe) is the current subframe CFI + 1.
Step 209, judging whether the adjusting timer is overtime; if yes, go to step 210, otherwise go to step 213;
if the CFI adaptive tuning timer of the current frame type is overtime (is greater than or equal to the CFI adaptive tuning period cfiModT), the cfiModTimer of the current frame type is restarted, meanwhile, whether the number of times that the PDCCH resource of the current frame type is limited does not exceed the control channel limitation decision threshold is judged, if cfiN _ CCH < (cfiTH 1_ CCH × NUM _ SUBSNF, it is judged that the CFI needs to be reduced, wherein cfiTH1_ CCH is a CFI down-regulation proportional threshold. Generally, the CFI down-regulation ratio threshold may be set to 0%, that is, the PDCCH resources in the CFI adaptive adjustment period are not limited, and then the CFI is reduced.
Step 210, restarting the adjustment timer;
step 211, judging whether the PDCCH resource limited times do not exceed a control channel limited judgment threshold; if yes, go to step 212, otherwise go to step 213;
step 212, adjusting the CFI downwards;
if the current uplink and downlink simultaneous scheduling conventional subframe is adopted, the updated 'uplink and downlink simultaneous scheduling conventional subframe' CFI is max (the current subframe CFI-1, 1).
Step 213, controlling the maximum symbol protection of the area;
the final updated CFI is: if the current is the uplink and downlink simultaneous scheduling subframe, the uplink and downlink simultaneous scheduling subframe comprises the conventional subframe, and the updated CFI is min (the maximum symbol number of a control region when the current CFI and the uplink and downlink transmit PDCCH). Here, a protection can be performed to ensure that the value of the CFI is not greater than 3, and 3 is the maximum number of symbols in the control region when the PDCCH is transmitted in both uplink and downlink, and is set in the base station.
Step 214, the subframe resource is limited, and the CFI is the CFI of the frame;
and step 215, ending.
Method embodiment three
Referring to fig. 3, a flowchart of a third embodiment of the resource allocation method of the present invention is shown, and is applied to a TDD-standard cell base station, where the method specifically includes:
step 301, judging whether a CFI adaptive function is started or not; if yes, go to step 302, if no, go to step 312;
specifically, whether a CFI adaptive function is started or not is judged; if the base station is started, the subsequent process is executed, and if the base station is not started, the current configuration of the base station is adopted, and the process is exited.
Step 302, calculating the CCE occupancy rate of the current frame;
specifically, the CCE occupancy rate cfiOCURATE _ CCH of the current frame is calculated, where cfiOCURATE _ CCH is CCEsum/CCEnum, where CCEnum is the total number of CCEs of the current CFI of the frame, and CCEsum is the number of occupied CCEs.
Step 303, judging whether the occupancy rate of the CCE of the current frame is higher than a PDCCH resource limitation judgment down-regulation threshold; if yes, go to step 314, otherwise go to step 304;
specifically, whether the current frame CCE occupancy rate cfiocure _ CCH is higher than the PDCCH resource limitation determination down-regulation threshold cceudragth _ low [ max (CFI-2,0) ], if so, the subframe PDCCH resource is considered to be limited, and the CFI value is still the CFI value of the frame, which is not allowed to be adjusted.
Step 304, counting the limited times of the PDCCH resources in the adjusting window according to the frame type;
specifically, a fixed window statistical method may be adopted to count the PDCCH resource limited times cfiN _ CCHi and subframe number NUM _ SUBSNFi in each "CFI adaptive adjustment period cfiModT" according to the frame type (special subframe/uplink and downlink simultaneous scheduling regular subframe/downlink only scheduling regular subframe), where i is 0 (special subframe)/1 (uplink and downlink simultaneous scheduling regular subframe)/2 (downlink only scheduling regular subframe).
305, judging whether the CCE occupancy rate of the current frame is higher than a PDCCH resource limitation judgment up-regulation threshold; if yes, go to step 306, otherwise go to step 308;
and judging whether the CCE occupancy rate cfiOCURATE _ CCH of the current frame exceeds the PDCCH resource limitation judgment upper adjustment threshold cceUsageTH _ high [ min (CFI-1,1) ], if so, restarting a CFI adaptive tuning timer cfiModTimeri of the current frame type, wherein i is the current frame type, and meanwhile, judging that the CFI value needs to be increased at the moment.
Step 306, adjusting CFI;
specifically, if the current frame is a special subframe, the CFI of the subsequent "special subframe" is updated to min (CFI +1, 2 of the current subframe); if the current frame is an uplink and downlink simultaneous scheduling conventional subframe, updating the CFI of the subsequent uplink and downlink simultaneous scheduling conventional subframe to be the CFI +1 of the current subframe; and if the current frame is the downlink-only scheduling conventional subframe, updating the CFI of the subsequent downlink-only scheduling conventional subframe to be the CFI +1 of the current subframe.
Step 307, restarting the adjusting timer;
step 308, judging whether the adjusting timer is overtime; if yes, go to step 309, otherwise go to step 312;
if the CFI adaptive tuning timer cfiModTimeri of the current frame type is overtime (greater than or equal to the CFI adaptive tuning period cfiModT), the cfiModTimeri of the current frame type is restarted, wherein i is the current frame type.
Step 309, restarting the adjustment timer;
step 310, judging whether the PDCCH resource limited times do not exceed a control channel limited judgment threshold; if yes, go to step 311, otherwise go to step 312;
meanwhile, whether the PDCCH resource limitation times of the current frame type do not exceed a control channel limitation judgment threshold is judged, if cfiN _ CCHi < (cfiTH 1_ CCH × NUM _ SUBSNFi), the CFI is judged to be reduced, wherein cfiTH1_ CCH is a CFI down-regulation proportional threshold. Generally, the CFI down-regulation ratio threshold is set to 0%, that is, the PDCCH resources in the CFI adaptive adjustment period are not limited.
Step 311, down-regulating the CFI;
specifically, if the current frame is a special subframe, the CFI of the subsequent "special subframe" is updated to max (CFI-1,1 of the current subframe); if the current frame is the uplink and downlink simultaneous scheduling conventional subframe, updating the CFI of the subsequent uplink and downlink simultaneous scheduling conventional subframe to be max (CFI-1,1 of the current subframe); and if the current frame is the downlink-only scheduling conventional subframe, updating the CFI of the subsequent downlink-only scheduling conventional subframe to be max (CFI-1,1 of the current subframe).
The setting of the PDCCH resource limitation judgment down-regulation threshold cceUsagTH _ low [ i ] needs to meet the following conditions: CCE total number CCEnum multiplied by cceUsagTH _ high [ i ] after CFI down-regulation is larger than CCE total number CCEnum multiplied by cceUsagTH _ low [ i ] corresponding to the current CFI.
Step 312, controlling the maximum symbol protection of the area;
the final updated CFI is:
(1) if the current is the uplink and downlink simultaneous scheduling subframe, the uplink and downlink simultaneous scheduling subframe comprises a conventional subframe and a special subframe, and the updated CFI is min (the maximum symbol number of a control region when the PDCCH is sent to the current CFI and the uplink and downlink);
(2) and if the current CFI is the downlink-only scheduling subframe, the downlink-only scheduling subframe comprises a conventional subframe and a special subframe, and the updated CFI is min (the current CFI, the maximum symbol number of a control region when the PDCCH is transmitted in a downlink).
Step 313, the subframe resource is limited, and the CFI is the CFI of the frame;
and step 314, ending.
Device embodiment
Referring to fig. 4, a block diagram of a resource allocation apparatus according to an embodiment of the present invention is shown, where the apparatus may specifically include:
a mode determining module 401, configured to determine whether the control format indicates that the CFI adaptive function is turned on, and if so, obtain a system and a bandwidth of the current cell;
a range setting module 402, configured to set a value range of the CFI value according to the system and the bandwidth of the current cell; the system comprises a frequency division duplex FDD system or a time division duplex TDD system;
and a dynamic adjustment module 403, configured to perform adaptive adjustment on the CFI value of the current frame type according to the occupancy rate of the control channel element CCE of the current frame, the PDCCH resource restriction determination down-regulation threshold of the physical downlink control channel, and the PDCCH resource restriction determination up-regulation threshold, where the adjusted CFI value does not exceed the CFI value range.
Optionally, the range setting module 402 may specifically include:
a first setting submodule, configured to set a value range of the CFI value as a first value range if the format of the current cell is a frequency division duplex FDD format and the bandwidth of the current cell is a first bandwidth; or
A second setting submodule, configured to set a value range of the CFI value as a second value range if the format of the current cell is a frequency division duplex FDD format and the bandwidth of the current cell is a second bandwidth; or
And a third setting submodule, configured to set a value range of the CFI value to a third value range if the format of the current cell is a time division duplex TDD format.
Optionally, the first bandwidth is 5M, and the first value range is: a CFI value greater than or equal to 2 and less than or equal to 3; the second bandwidth comprises any one of: 10M, 15M, 20M, the second value range is: the CFI value is greater than or equal to 1 and less than or equal to 3.
Optionally, the dynamic adjustment module 403 may specifically include:
the first threshold judgment submodule is used for judging whether the CCE occupancy rate of the current frame exceeds the PDCCH resource limitation judgment down-regulation threshold;
the second threshold judgment submodule is used for judging whether the CCE occupancy rate of the current frame exceeds the PDCCH resource limitation judgment down-regulation threshold or not if the CCE occupancy rate of the current frame does not exceed the PDCCH resource limitation judgment up-regulation threshold;
and the up-regulation sub-module is used for restarting the CFI adaptive setting timer of the current frame type and up-regulating the CFI value of the current frame type if the CCE occupancy rate of the current frame exceeds the PDCCH resource limitation judgment up-regulation threshold, wherein the up-regulated CFI value does not exceed the CFI value range.
Optionally, the apparatus may further include:
and the limiting module is used for refusing to adjust the CFI value of the current frame type if the CCE occupancy rate of the current frame exceeds the PDCCH resource limitation judgment down-regulation threshold.
Optionally, the apparatus may further include:
and the down-regulation module is used for judging whether the CFI adaptive setting timer of the current frame type is overtime or not if the CCE occupancy rate of the current frame does not exceed the PDCCH resource limitation judgment up-regulation threshold, restarting the CFI adaptive setting timer of the current frame type if the CCE occupancy rate of the current frame type does not exceed the CFI adaptive setting timer of the current frame type, judging whether the PDCCH resource limitation times of the current frame type does not exceed the control channel limitation judgment threshold or not, and if the CCE occupancy rate of the current frame type does not exceed the control channel limitation judgment threshold, down-regulating the CFI value of the current frame type, and enabling the down-regulated CFI value not to exceed the CFI value range.
Optionally, if the standard of the current cell is an FDD standard, the current frame includes: scheduling the conventional subframes by uplink and downlink simultaneously; if the standard of the current cell is a TDD standard, the current frame comprises: and scheduling the conventional subframe, scheduling the special subframe, scheduling the conventional subframe only in the downlink and scheduling the special subframe only in the downlink simultaneously.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The method for allocating resources and the device for allocating resources provided by the present invention are described in detail above, and the principle and the implementation of the present invention are explained in this document by applying specific examples, and the description of the above examples is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (12)

1. A method of resource allocation, the method comprising:
judging whether the control format indicates that the CFI adaptive function is started or not, if so, acquiring the system and bandwidth of the current cell;
setting the value range of the CFI value according to the standard and the bandwidth of the current cell; the system comprises a frequency division duplex FDD system or a time division duplex TDD system;
according to the CCE occupancy rate of a control channel unit of the current frame, a PDCCH resource limitation judgment down-regulation threshold and a PDCCH resource limitation judgment up-regulation threshold, the CFI value of the current frame type is adaptively adjusted, wherein the adjusted CFI value does not exceed the CFI value range;
wherein, the setting of the value range of the CFI value according to the standard and the bandwidth of the current cell includes:
if the mode of the current cell is a Frequency Division Duplex (FDD) mode and the bandwidth of the current cell is a first bandwidth, setting the value range of the CFI value as a first value range; or
If the mode of the current cell is a Frequency Division Duplex (FDD) mode and the bandwidth of the current cell is a second bandwidth, setting the value range of the CFI value as a second value range; or
And if the mode of the current cell is a Time Division Duplex (TDD) mode, setting the value range of the CFI value as a third value range.
2. The method of claim 1, wherein the first bandwidth is 5M, and the first range of values is: a CFI value greater than or equal to 2 and less than or equal to 3; the second bandwidth comprises any one of: 10M, 15M, 20M, the second value range is: the CFI value is greater than or equal to 1 and less than or equal to 3.
3. The method of claim 1, wherein the adaptively adjusting the CFI value of the current frame type according to the CCE occupancy of the current frame, the PDCCH resource restriction determination down-regulation threshold of the physical downlink control channel, and the PDCCH resource restriction determination up-regulation threshold comprises:
judging whether the CCE occupancy rate of the current frame exceeds a PDCCH resource limitation judgment down-regulation threshold;
if the CCE occupancy rate of the current frame does not exceed the PDCCH resource limitation judgment down-regulation threshold, judging whether the CCE occupancy rate of the current frame exceeds the PDCCH resource limitation judgment up-regulation threshold;
and if the CCE occupancy rate of the current frame exceeds the PDCCH resource limitation judgment up-regulation threshold, restarting the CFI adaptive tuning timer of the current frame type, and up-regulating the CFI value of the current frame type, wherein the up-regulated CFI value does not exceed the CFI value range.
4. The method of claim 3, wherein after the determining whether the CCE occupancy of the current frame exceeds the PDCCH resource restriction determination turn-down threshold, the method further comprises:
and if the CCE occupancy rate of the current frame exceeds the PDCCH resource limitation judgment down-regulation threshold, refusing to adjust the CFI value of the current frame type.
5. The method of claim 3, wherein after the determining whether the CCE occupancy of the current frame exceeds the PDCCH resource restriction determination upturn threshold, the method further comprises:
if the CCE occupancy rate of the current frame does not exceed the PDCCH resource limitation judgment up-regulation threshold, judging whether the CFI adaptive setting timer of the current frame type is overtime, if so, restarting the CFI adaptive setting timer of the current frame type, judging whether the PDCCH resource limitation times of the current frame type does not exceed the control channel limitation judgment threshold, if so, down-regulating the CFI value of the current frame type, and enabling the down-regulated CFI value not to exceed the CFI value range.
6. The method according to any of claims 1 to 5, wherein if the format of the current cell is FDD format, the current frame comprises: scheduling the conventional subframes by uplink and downlink simultaneously; if the standard of the current cell is a TDD standard, the current frame comprises: and scheduling the conventional subframe, scheduling the special subframe, scheduling the conventional subframe only in the downlink and scheduling the special subframe only in the downlink simultaneously.
7. An apparatus for resource allocation, the apparatus comprising:
the mode judging module is used for judging whether the control format indicates that the CFI self-adaptive function is started or not, and if so, acquiring the system and the bandwidth of the current cell;
the range setting module is used for setting the value range of the CFI value according to the system and the bandwidth of the current cell; the system comprises a frequency division duplex FDD system or a time division duplex TDD system;
the dynamic adjustment module is used for adaptively adjusting the CFI value of the current frame type according to the CCE occupancy rate of the control channel unit of the current frame, the PDCCH resource limitation judgment down-regulation threshold and the PDCCH resource limitation judgment up-regulation threshold, wherein the adjusted CFI value does not exceed the CFI value range;
wherein the range setting module includes:
a first setting submodule, configured to set a value range of the CFI value as a first value range if the format of the current cell is a frequency division duplex FDD format and the bandwidth of the current cell is a first bandwidth; or
A second setting submodule, configured to set a value range of the CFI value as a second value range if the format of the current cell is a frequency division duplex FDD format and the bandwidth of the current cell is a second bandwidth; or
And a third setting submodule, configured to set a value range of the CFI value to a third value range if the format of the current cell is a time division duplex TDD format.
8. The apparatus of claim 7, wherein the first bandwidth is 5M, and wherein the first range of values is: a CFI value greater than or equal to 2 and less than or equal to 3; the second bandwidth comprises any one of: 10M, 15M, 20M, the second value range is: the CFI value is greater than or equal to 1 and less than or equal to 3.
9. The apparatus of claim 7, wherein the dynamic adjustment module comprises:
the first threshold judgment submodule is used for judging whether the CCE occupancy rate of the current frame exceeds the PDCCH resource limitation judgment down-regulation threshold;
the second threshold judgment submodule is used for judging whether the CCE occupancy rate of the current frame exceeds the PDCCH resource limitation judgment down-regulation threshold or not if the CCE occupancy rate of the current frame does not exceed the PDCCH resource limitation judgment up-regulation threshold;
and the up-regulation sub-module is used for restarting the CFI adaptive setting timer of the current frame type and up-regulating the CFI value of the current frame type if the CCE occupancy rate of the current frame exceeds the PDCCH resource limitation judgment up-regulation threshold, wherein the up-regulated CFI value does not exceed the CFI value range.
10. The apparatus of claim 9, further comprising:
and the limiting module is used for refusing to adjust the CFI value of the current frame type if the CCE occupancy rate of the current frame exceeds the PDCCH resource limitation judgment down-regulation threshold.
11. The apparatus of claim 9, further comprising:
and the down-regulation module is used for judging whether the CFI adaptive setting timer of the current frame type is overtime or not if the CCE occupancy rate of the current frame does not exceed the PDCCH resource limitation judgment up-regulation threshold, restarting the CFI adaptive setting timer of the current frame type if the CCE occupancy rate of the current frame type does not exceed the CFI adaptive setting timer of the current frame type, judging whether the PDCCH resource limitation times of the current frame type does not exceed the control channel limitation judgment threshold or not, and if the CCE occupancy rate of the current frame type does not exceed the control channel limitation judgment threshold, down-regulating the CFI value of the current frame type, and enabling the down-regulated CFI value not to exceed the CFI value range.
12. The apparatus according to any of claims 7 to 11, wherein if the format of the current cell is FDD format, the current frame comprises: scheduling the conventional subframes by uplink and downlink simultaneously; if the standard of the current cell is a TDD standard, the current frame comprises: and scheduling the conventional subframe, scheduling the special subframe, scheduling the conventional subframe only in the downlink and scheduling the special subframe only in the downlink simultaneously.
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