CN109217997B - Method and device for dynamically adjusting CFI in subframe - Google Patents

Method and device for dynamically adjusting CFI in subframe Download PDF

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CN109217997B
CN109217997B CN201710552659.1A CN201710552659A CN109217997B CN 109217997 B CN109217997 B CN 109217997B CN 201710552659 A CN201710552659 A CN 201710552659A CN 109217997 B CN109217997 B CN 109217997B
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scheduling
cfi
cce
cces
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CN109217997A (en
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张锋
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Potevio Information Technology Co Ltd
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Abstract

The invention provides a method and a device for dynamically adjusting CFI in a subframe, wherein the method comprises the following steps: acquiring the number of CCEs to be used in public message scheduling in a current scheduling subframe, the number of CCEs to be used in uplink authorized scheduling of the current subframe and the number of CCEs to be used in downlink authorized scheduling of the current subframe; and acquiring a CFI (channel quality indicator) adjustment value according to the number of CCEs to be used in public message scheduling, the number of CCEs to be used in uplink authorized scheduling, the number of CCEs to be used in downlink authorized scheduling and a preset CFI adjustment formula, and adjusting the current CFI, so that the corresponding CFI is updated according to the real-time scheduling condition, the influence of public messages on CFI adjustment statistics is avoided, and the problem of low dynamic adjustment range of the CFI with small bandwidth is solved.

Description

Method and device for dynamically adjusting CFI in subframe
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a method and an apparatus for dynamically adjusting CFI in a subframe.
Background
A Physical Downlink Control CHannel (PDCCH) is a set of Physical resource elements, and carries Downlink Control information including scheduling information for Downlink and uplink data transmission, uplink power Control information, and the like. In the time domain, the resource occupied by the PDCCH refers to the number of symbols occupied by PDCCH channel information. In the conventional situation, the LTE downlink subframe control area configuration adopts a static adjustment manner, that is, the first several symbols occupying one downlink subframe are used for bearing downlink control signaling, and the size of the control area resource cannot be flexibly adjusted according to the actual requirement of the control area resource.
In order to solve the problems existing in the traditional configuration mode of the downlink subframe control area in the LTE system, a great number of manufacturers propose a CFI (control format indicator) self-adaptive technical scheme of the downlink subframe, namely, the number of symbols occupied by the downlink subframe control area is dynamically adjusted according to the requirement condition of the downlink subframe control area resources, and the utilization rate of network resources is improved while the transmission of control information is met. In the existing scheme, the value of the CFI is basically determined according to the utilization rate of the CCE resources for a period of time, and since the change of the value of the CFI has a great influence on the utilization rate of the CCE resources, ping-pong adjustment will be caused. Common message scheduling has a severe impact on CCE resource usage statistics in small bandwidth situations, resulting in a low CFI dynamic adjustment range and thus affecting peak rates.
Disclosure of Invention
The invention provides a method and a device for dynamically adjusting CFI (computational fluid dynamics) in a subframe, which are used for solving the problem of low dynamic adjustment range of CFI (computational fluid dynamics) with small bandwidth in the prior art.
In a first aspect, the present invention provides a method for dynamically adjusting a CFI in a subframe, including:
acquiring the number of CCEs to be used in public message scheduling in the current scheduling subframe;
acquiring the number of CCEs to be used in uplink authorization scheduling in a current scheduling subframe;
acquiring the number of CCEs to be used by downlink authorization scheduling in a current scheduling subframe;
and obtaining a CFI (channel quality indicator) adjustment value according to the number of CCEs to be used in the public message scheduling, the number of CCEs to be used in the uplink authorization scheduling, the number of CCEs to be used in the downlink authorization scheduling and a preset CFI adjustment formula, and adjusting the current CFI.
Optionally, the method further comprises:
and obtaining a downlink CCE use proportion value according to the number of CCEs to be used in the public message scheduling, the number of CCEs to be used in the uplink authorization scheduling, the number of CCEs to be used in the downlink authorization scheduling, the CCE total number determined by the CFI adjustment formula and a preset proportion adjustment direction relation.
Optionally, the obtaining of the number of CCEs to be used in uplink grant scheduling in the current scheduling subframe includes:
determining whether the current subframe is an uplink schedulable subframe;
if the current subframe is determined to be an uplink schedulable subframe, acquiring the number of CCEs corresponding to the current subframe in the last scheduling record;
acquiring the number of CCEs corresponding to the last uplink scheduling subframe in the scheduling record;
acquiring the minimum CCE aggregation level permitted to be used by uplink scheduling;
and determining the number of CCEs corresponding to the current subframe in the last scheduling record, the number of CCEs corresponding to the last uplink scheduling subframe and the maximum value in the minimum CCE aggregation level as the number of CCEs to be used in uplink authorization scheduling in the current scheduling subframe.
Optionally, the obtaining the number of CCEs to be used in downlink scheduling in the current scheduling subframe includes:
acquiring the number of CCEs corresponding to the current subframe in the last scheduling record;
acquiring the number of CCEs corresponding to the last downlink scheduling subframe in the scheduling record;
acquiring the minimum CCE aggregation level permitted to be used by downlink scheduling;
and determining the number of CCEs corresponding to the current subframe in the last scheduling record, the number of CCEs corresponding to the last downlink scheduling subframe in the scheduling record and the maximum value in the minimum CCE aggregation level as the number of CCEs to be used in downlink authorization scheduling in the current scheduling subframe.
Optionally, the CFI adjustment formula includes:
Figure BDA0001344875420000031
SCFI＝{cfi|NCCE(cfi)＞＝NCCE_PRE},cfi＝1...CFIMAX
Figure BDA0001344875420000032
NCCE_PRE＝NCCE_COM_PRE+NCCE_UL_PRE+NCCE_DL_PRE
wherein, CFI _ VALUE is the CFI VALUE finally determined and used by the current sub-frame, NCCE(CFI) is the total number of CCEs available for PDCCH in the current subframe when CFI equals CFI, CFIMAXIs the value upper limit of the CFI of the current subframe, SCFIFor the current sub-frame at NCCE(cfi)＞＝NCCE_PRE，cfi＝1...CFIMAXSet of CFIs under conditions, NCCE_PREThe total number of CCEs to be used for the current schedule.
Optionally, the obtaining of the downlink CCE usage ratio value according to the number of CCEs to be used in the common message scheduling, the number of CCEs to be used in the uplink scheduling, the number of CCEs to be used in the downlink scheduling, the total number of CCEs determined by the CFI adjustment formula, and a preset ratio adjustment direction relationship includes:
obtaining the current use information of the uplink CCE and the downlink CCE according to the number of CCEs to be used in the public message scheduling, the number of CCEs to be used in the uplink scheduling and the number of CCEs to be used in the downlink scheduling;
obtaining a direction adjustment strategy according to the current use information and the ratio adjustment direction relationship of the uplink CCE and the downlink CCE;
and obtaining a downlink CCE use proportion value according to the adjustment direction strategy and a preset proportion formula.
In a second aspect, the present invention provides an apparatus for dynamically adjusting CFI in a subframe, comprising:
the first obtaining module is used for obtaining the number of CCEs to be used in public message scheduling in the current scheduling subframe;
the second obtaining module is used for obtaining the number of CCEs to be used in uplink scheduling in the current scheduling subframe;
a third obtaining module, configured to obtain the number of CCEs to be used in downlink scheduling in the current scheduling subframe;
and the adjusting module is used for obtaining a CFI adjusting value according to the number of CCEs to be used in the public message scheduling, the number of CCEs to be used in the uplink scheduling, the number of CCEs to be used in the downlink scheduling and a preset CFI adjusting formula, and adjusting the current CFI.
Optionally, the system further includes a calculating module, configured to obtain a downlink CCE usage ratio value according to the number of CCEs to be used in the common message scheduling, the number of CCEs to be used in the uplink scheduling, the number of CCEs to be used in the downlink scheduling, a CCE total number determined by a CFI adjustment formula, and a preset ratio adjustment direction relationship.
In a third aspect, the present invention provides an apparatus for dynamically adjusting CFI in a subframe, comprising: a processor, a memory, and a bus, wherein,
the processor and the memory are communicated with each other through the bus;
the memory stores program instructions executable by the processor, which when called by the processor are capable of performing the methods described above.
In a fourth aspect, the invention provides a non-transitory computer readable storage medium storing computer instructions which cause the computer to perform the method as described above.
It can be known from the foregoing technical solutions that, in the method and apparatus for dynamically adjusting CFI in a subframe provided in the embodiments of the present invention, by obtaining the number of CCEs to be used for common message scheduling, the number of CCEs to be used for uplink grant scheduling, and the number of CCEs to be used for downlink grant scheduling in a current scheduling subframe, obtaining a CFI adjustment value according to each CCE number and a preset CFI adjustment formula, and automatically adjusting the current CFI, a corresponding CFI is updated according to a real-time scheduling condition, an influence of a common message on CFI adjustment statistics is avoided, and a problem of a low dynamic adjustment range of a small-bandwidth CFI is solved.
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Fig. 1 is a schematic flowchart of a method for dynamically adjusting CFI in a subframe according to embodiment 1 of the present invention;
fig. 2 is a schematic flowchart of a method for dynamically adjusting CFI in a subframe according to embodiment 3 of the present invention;
fig. 3 is a schematic structural diagram of an apparatus for dynamically adjusting CFI in a subframe according to embodiment 4 of the present invention;
fig. 4 is a schematic structural diagram of an apparatus for dynamically adjusting CFI in a subframe according to embodiment 5 of the present invention;
fig. 5 is a schematic structural diagram of an apparatus for dynamically adjusting CFI in a subframe according to embodiment 6 of the present invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Fig. 1 shows a method for dynamically adjusting CFI in a subframe according to embodiment 1 of the present invention, which includes:
s11, obtaining the number of CCEs to be used in the public message scheduling in the current scheduling subframe.
S12, obtaining the number of CCEs to be used by the uplink authorization scheduling in the current scheduling subframe.
S13, obtaining the number of CCEs to be used by the downlink authorization scheduling in the current scheduling subframe.
In the foregoing step, it should be noted that, in the embodiment of the present invention, a Physical Downlink Control Channel (PDCCH) carries a Control Format Indicator (CFI) to identify the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols used for Downlink Control Channel transmission in each subframe. The resource occupied by the PDCCH refers to the number of symbols occupied by PDCCH channel information. PDCCH resource mapping is designed in an LTE system in units of Control Channel Elements (CCEs). Because the number of users in each cell in the system is dynamically changed, correspondingly, the actual demand of each cell for the control area resource CCE is also dynamically changed. Therefore, the CFI needs to be dynamically adjusted according to the number of CCEs.
CCE resources are divided into three categories, namely CCE (CCE _ COM) used in common message scheduling, CCE (CCE _ DL) used in downlink scheduling and CCE (CCE _ UL) used in uplink scheduling.
In an embodiment of the present invention, each scheduling interval is a per transmission interval. And acquiring the number of CCEs to be used in the public message scheduling of the current subframe, the number of CCEs to be used in the uplink authorized scheduling of the current subframe and the number of CCEs to be used in the downlink authorized scheduling of the current subframe in the current scheduled subframe.
S14, obtaining a CFI adjusting value according to the CCE number to be used in the public message scheduling, the CCE number to be used in the uplink authorization scheduling, the CCE number to be used in the downlink authorization scheduling and a preset CFI adjusting formula, and adjusting the current CFI.
In this step, it should be noted that, in the embodiment of the present invention, the CFI adjustment formula includes:
Figure BDA0001344875420000061
SCFI＝{cfi|NCCE(cfi)＞＝NCCE_PRE},cfi＝1...CFIMAX
Figure BDA0001344875420000062
NCCE_PRE＝NCCE_COM_PRE+NCCE_UL_PRE+NCCE_DL_PRE
wherein, CFI _ VALUE is the CFI VALUE finally determined and used by the current sub-frame, NCCE(CFI) is the total number of CCEs available for PDCCH in the current subframe when CFI equals CFI, CFIMAXIs the value upper limit of the CFI of the current subframe, SCFIFor the current sub-frame at NCCE(cfi)＞＝NCCE_PRE，cfi＝1...CFIMAXSet of CFIs under conditions, NCCE_PREThe total number of CCEs to be used for the current schedule.
It should be further noted that, for the above formulas, the TDD subframes 1and 6 are of the subframe types TDD subframe 1and TDD subframe 6. Bandwidth ≠ 1.4M indicates that the bandwidth is not 1.4M.
In this embodiment, the CFI adjustment value can be obtained by combining the obtained number of each CCE with the above formula, and the current CFI is automatically adjusted.
In addition, it should be noted that the scheduling record in the embodiment of the present invention counts the requirement of the CCE after each scheduling subframe is scheduled. In the process of CCE resource allocation, no matter CCE resource allocation fails or succeeds, once a user applies for the CCE resources, the CCE scheduling records are uniformly updated. To determine CFI and pDL_CCEProviding direct input.
The scheduling record is designed to be used in a cyclic manner at a subframe level so as to save overhead, and is defined as follows:
Figure BDA0001344875420000071
if a user applies for CCE resources in uplink scheduling (which may or may not succeed), updating
ulPreCceNum＝ulPreCceNum+Cce_L
If a user applies for CCE resources in downlink scheduling (which may or may not succeed), updating
dlPreCceNum＝dlPreCceNum+Cce_L
Wherein the Cce _ L is a Cce aggregation level recommended by the user for the current scheduling, and the Cce _ L is related to the channel quality of the user, and generally speaking, if the channel quality is good, the aggregation level is small, and otherwise, the aggregation level is large.
In the method for dynamically adjusting CFI in a subframe provided in embodiment 1 of the present invention, by obtaining the number of CCEs to be used for public message scheduling, the number of CCEs to be used for uplink grant scheduling, and the number of CCEs to be used for downlink grant scheduling in a current scheduling subframe, obtaining a CFI adjustment value according to each CCE number and a preset CFI adjustment formula, and automatically adjusting a current CFI, a corresponding CFI is updated according to a real-time scheduling condition, an influence of a public message on CFI adjustment statistics is avoided, and a problem of a low dynamic adjustment range of a low-bandwidth CFI is solved.
The method for dynamically adjusting the CFI in the subframe provided in embodiment 2 of the present invention includes:
s21, obtaining the number of CCEs to be used in the public message scheduling in the current scheduling subframe.
S22, obtaining the number of CCEs to be used by the uplink authorization scheduling in the current scheduling subframe.
S23, obtaining the number of CCEs to be used by the downlink authorization scheduling in the current scheduling subframe.
In the foregoing step, it should be noted that, in the embodiment of the present invention, a Physical Downlink Control Channel (PDCCH) carries a Control Format Indicator (CFI) to identify the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols used for Downlink Control Channel transmission in each subframe. The resource occupied by the PDCCH refers to the number of symbols occupied by PDCCH channel information. PDCCH resource mapping is designed in an LTE system in units of Control Channel Elements (CCEs). Because the number of users in each cell in the system is dynamically changed, correspondingly, the actual demand of each cell for the control area resource CCE is also dynamically changed. Therefore, the CFI needs to be dynamically adjusted according to the number of CCEs.
CCE resources are divided into three categories, namely CCE (CCE _ COM) used in common message scheduling, CCE (CCE _ DL) used in downlink scheduling and CCE (CCE _ UL) used in uplink scheduling.
In an embodiment of the present invention, each scheduling interval is a per transmission interval. And acquiring the number of CCEs to be used in the public message scheduling of the current subframe, the number of CCEs to be used in the uplink authorized scheduling of the current subframe and the number of CCEs to be used in the downlink authorized scheduling of the current subframe in the current scheduled subframe.
The above steps are explained separately, specifically as follows:
with respect to step S21, it should be noted that: let N _ CCE _ COM (N)CCE_COM_PRE) Indicating the number of CCEs to be used (to be) by the current subframe common message. The N _ CCE _ COM is determined by a cell-configured common message CCE aggregation level (CCE _ L _ COM) and the number of common messages. To facilitate the calculation of the number of common messages, a variable comMsgBitmap is introduced, and the meaning of 4 bits in total of comMsgBitMap is as follows:
bit3 — whether there is a random access response in the current subframe: 0-represents absence, 1-represents absence;
bit2 — whether there is a broadcast message in the current subframe: 0-represents absence, 1-represents absence;
bit1 — whether there is a non-trunking paging message in the current subframe: 0-represents absence, 1-represents absence;
bit0 — whether there is a cluster paging message in the current subframe: 0-represents absence, 1-represents absence;
for example, the calculation of N _ CCE _ COM can be determined by the following two tables, and which table is specifically used is determined by CCE _ L _ COM.
Table 1 shows that N _ CCE _ COM vs comMsgBitMap while CCL _ L _ COM is 4
comMsgBitMap N_CCE_COM comMsgBitMap N_CCE_COM
0 0 8 4
1 4 9 8
2 4 10 8
3 8 11 12
4 4 12 8
5 8 13 12
6 8 14 12
7 12 15 16
Table 2 shows that N _ CCE _ COM vs comMsgBitMap while CCL _ L _ COM is 8
comMsgBitMap N_CCE_COM comMsgBitMap N_CCE_COM
0 0 8 8
1 8 9 16
2 8 10 16
3 16 11 16
4 8 12 16
5 16 13 16
6 16 14 16
7 12 15 16
And obtaining the number of CCEs to be used in the current subframe public message scheduling according to preset table data.
With respect to step S22, it should be noted that: set N _ CCE _ UL (N)CCE_UL_PRE) Indicates the number of CCEs to be used (to be used) in the uplink grant scheduling in the current scheduling interval time.
Determining whether the current subframe is an uplink schedulable subframe, if the current subframe is determined not to be the uplink schedulable subframe, NCCE_UL_PRE＝0。
If the current subframe is determined to be an uplink schedulable subframe, acquiring the number of CCEs corresponding to the current subframe in the last scheduling record;
acquiring the number of CCEs corresponding to the last uplink scheduling subframe in the scheduling record;
acquiring the minimum CCE aggregation level permitted to be used by uplink scheduling;
and determining the number of CCEs corresponding to the current subframe in the last scheduling record, the number of CCEs corresponding to the last uplink scheduling subframe and the maximum value in the minimum CCE aggregation level as the number of CCEs to be used in uplink authorization scheduling in the current scheduling subframe.
Namely: n is a radical ofCCE_UL_PRE＝max(ulPreCceNum,ulPreCceNumLast,ulReserveCceNum)
Wherein ulprecpeak indicates the number of CCEs corresponding to the last scheduling record of the current subframe (specifically, see step 8 for scheduling record update). Wherein ulpreccumlast represents the number of CCEs corresponding to the last uplink scheduling subframe in the scheduling record. The purpose of the ul reserveccnum is to ensure that once a user wants to schedule, the user can use resources to reduce the delay.
In step S23, it should be noted that: let N _ CCE _ DL (N)CCE_DL_PRE) And indicating the number of CCEs to be used by the downlink grant scheduling of the current subframe.
Acquiring the number of CCEs corresponding to the current subframe in the last scheduling record;
acquiring the number of CCEs corresponding to the last downlink scheduling subframe in the scheduling record;
acquiring the minimum CCE aggregation level permitted to be used by downlink scheduling;
and determining the number of CCEs corresponding to the current subframe in the last scheduling record, the number of CCEs corresponding to the last downlink scheduling subframe in the scheduling record and the maximum value in the minimum CCE aggregation level as the number of CCEs to be used in downlink authorization scheduling in the current scheduling subframe.
Namely: n is a radical ofCCE_DL_PRE＝max(dlPreCceNum,dlPreCceNumLast,dlReserveCceNum)
Wherein dlpreccap indicates the number of CCEs corresponding to the last scheduling record of the current subframe. dlpreccalaust indicates the number of CCEs corresponding to the previous uplink scheduling subframe in the scheduling record. dlreservecenum represents the minimum CCE aggregation level used by the downlink scheduling grant, and aims to ensure that once a user wants to schedule, the user can use resources to reduce the delay.
S24, obtaining a CFI adjusting value according to the CCE number to be used in the public message scheduling, the CCE number to be used in the uplink authorization scheduling, the CCE number to be used in the downlink authorization scheduling and a preset CFI adjusting formula, and adjusting the current CFI.
This step S24 is the same as step S14 of embodiment 1, and is not repeated here based on the above detailed description.
In the method for dynamically adjusting CFI in a subframe provided in embodiment 2 of the present invention, by obtaining the number of CCEs to be used for public message scheduling, the number of CCEs to be used for uplink grant scheduling, and the number of CCEs to be used for downlink grant scheduling in a current scheduling subframe, obtaining a CFI adjustment value according to each CCE number and a preset CFI adjustment formula, and automatically adjusting the current CFI, a corresponding CFI is updated according to a real-time scheduling condition, an influence of a public message on CFI adjustment statistics is avoided, and a problem of a low dynamic adjustment range of a low-bandwidth CFI is solved.
Fig. 2 shows a method for dynamically adjusting a CFI in a subframe according to embodiment 3 of the present invention, which includes:
s31, obtaining the number of CCEs to be used in the public message scheduling in the current scheduling subframe.
S32, obtaining the number of CCEs to be used by the uplink authorization scheduling in the current scheduling subframe.
S33, obtaining the number of CCEs to be used by the downlink authorization scheduling in the current scheduling subframe.
S34, obtaining a CFI adjusting value according to the CCE number to be used in the public message scheduling, the CCE number to be used in the uplink authorization scheduling, the CCE number to be used in the downlink authorization scheduling and a preset CFI adjusting formula, and adjusting the current CFI.
It should be noted that, in the embodiment of the present invention, the steps S31 to S34 are the same as the steps S21 to S24 of the embodiment 2, and are not repeated herein based on the above detailed description.
S35, obtaining the downlink CCE usage proportion value according to the CCE number to be used in the public message scheduling, the CCE number to be used in the uplink authorization scheduling, the CCE number to be used in the downlink authorization scheduling, the CCE total number determined by the CFI adjustment formula and the preset proportion adjustment direction relation.
In this step, it should be noted that, in the embodiment of the present invention, since some subframes simultaneously have uplink and downlink scheduling, if the upper limit of CCE usage in a certain direction is not defined, it may cause that resources are all occupied by one party, which may cause a decrease in system performance.
Suppose that the downlink CCE usage ratio at the current time is rhoDL_CCEAnd then:
NCCE_UE＝(NCCE-NCCE_COM_PRE)
NCCE_DL＝ρDL_CCE·NCCE_UE
NCCE_UL＝NCCE_UE-NCCE_DL
wherein N isCCERepresenting the total number of CCEs available under the CFI determined by the current subframe; n is a radical ofCCE_UEThe total number of CCEs available after the CCEs occupied by the common message are excluded from the current subframe; n is a radical ofCCE_COM_PREThe number of CCEs occupied by the common message of the current subframe; n is a radical ofCCE_DLThe total number of CCEs available for downlink scheduling is calculated according to the current proportion; n is a radical ofCCE_ULThe total number of CCEs available for uplink scheduling is calculated according to the current proportion.
Provided that if N isCCE_UL_PRE<＝NCCE_ULThe uplink CCE is sufficient, otherwise it is not.
Provided that if N isCCE_DL_PRE<＝NCCE_DLThe downlink CCE is sufficient, otherwise it is not.
The direction of adjustment (direction) of the usage ratio of downlink CCE resources is defined as follows:
TABLE 3 is a table for specifying the direction of the proportional adjustment
Whether uplink resources are sufficient Whether downlink resources are sufficient Adjustment strategy
Yes Yes 0
Yes No +1
No Yes -1
No No sign(0.5-ρDL_CCE)
Note: direction: -1-represents a downward adjustment; 0-means no adjustment; + 1-indicates upward adjustment.
The final downlink CCE usage proportion:
Figure BDA0001344875420000121
where step is a configurable adjustment step size (recommended value 0.05).
In the method for dynamically adjusting CFI in a subframe provided in embodiment 3 of the present invention, the number of CCEs to be used for common message scheduling, the number of CCEs to be used for uplink grant scheduling, and the number of CCEs to be used for downlink grant scheduling in a current scheduling subframe are obtained, a CFI adjustment value is obtained according to each CCE number and a preset CFI adjustment formula, and the current CFI is automatically adjusted, and a downlink CCE usage ratio value is obtained according to each CCE number and a ratio adjustment direction relationship, so that a corresponding CFI is updated according to a real-time scheduling condition and the number of uplink and downlink CCEs is reasonably allocated, an influence of a common message on CFI adjustment statistics is avoided, and a problem of a low dynamic adjustment range of a CFI with a small bandwidth is solved.
Fig. 3 shows an apparatus for dynamically adjusting CFI within a subframe according to embodiment 4 of the present invention, which includes a first obtaining module 41, a second obtaining module 42, a third obtaining module 43, and an adjusting module 44, where:
a first obtaining module 41, configured to obtain the number of CCEs to be used in common message scheduling in the current scheduling subframe;
a second obtaining module 42, configured to obtain the number of CCEs to be used in uplink grant scheduling in the current scheduling subframe;
a third obtaining module 43, configured to obtain the number of CCEs to be used in downlink grant scheduling in the current scheduling subframe;
and an adjusting module 44, configured to obtain a CFI adjustment value according to the number of CCEs to be used in the public message scheduling, the number of CCEs to be used in the uplink grant scheduling, the number of CCEs to be used in the downlink grant scheduling, and a preset CFI adjustment formula, and adjust the current CFI.
In the adjusting process, the first obtaining module 41, the second obtaining module 42, and the third obtaining module 43 respectively obtain the number of CCEs to be used for common message scheduling, the number of CCEs to be used for uplink grant scheduling, and the number of CCEs to be used for downlink grant scheduling in the current scheduling subframe, and send the number of CCEs to the adjusting module. The adjusting module 44 obtains a CFI adjusting value according to the number of CCEs to be used for the common message scheduling, the number of CCEs to be used for the uplink grant scheduling, the number of CCEs to be used for the downlink grant scheduling, and a preset CFI adjusting formula, and adjusts the current CFI.
Since the apparatus of embodiment 4 of the present invention has the same principle as the method of embodiments 1-2, further details will not be repeated herein for further explanation.
It should be noted that, in the embodiment of the present invention, the relevant functional module may be implemented by a hardware processor (hardware processor).
The device for dynamically adjusting CFI in a subframe according to embodiment 4 of the present invention obtains the number of CCEs to be used for public message scheduling, the number of CCEs to be used for uplink grant scheduling, and the number of CCEs to be used for downlink grant scheduling in a current scheduling subframe, obtains a CFI adjustment value according to each CCE number and a preset CFI adjustment formula, and automatically adjusts the current CFI, so as to update a corresponding CFI according to a real-time scheduling condition, avoid an influence of a public message on CFI adjustment statistics, and solve a problem of a low dynamic adjustment range of a low-bandwidth CFI.
Fig. 4 shows an apparatus for dynamically adjusting CFI in a subframe according to embodiment 5 of the present invention, which includes a first obtaining module 51, a second obtaining module 52, a third obtaining module 53, an adjusting module 54, and a calculating module 55, where:
a first obtaining module 51, configured to obtain the number of CCEs to be used in common message scheduling in the current scheduling subframe;
a second obtaining module 52, configured to obtain the number of CCEs to be used in uplink grant scheduling in the current scheduling subframe;
a third obtaining module 53, configured to obtain the number of CCEs to be used in downlink grant scheduling in the current scheduling subframe;
an adjusting module 54, configured to obtain a CFI adjustment value according to the number of CCEs to be used for public message scheduling, the number of CCEs to be used for uplink grant scheduling, the number of CCEs to be used for downlink grant scheduling, and a preset CFI adjustment formula, and adjust a current CFI;
and the calculating module 55 is configured to obtain a downlink CCE usage ratio value according to the number of CCEs to be used in the common message scheduling, the number of CCEs to be used in the uplink scheduling, the number of CCEs to be used in the downlink scheduling, the total number of CCEs determined by the CFI adjustment formula, and a preset ratio adjustment direction relationship.
In the adjusting process, the first obtaining module 51, the second obtaining module 52 and the third obtaining module 53 respectively obtain the number of CCEs to be used in the common message scheduling, the number of CCEs to be used in the uplink grant scheduling and the number of CCEs to be used in the downlink grant scheduling in the current scheduling subframe, and send the number of CCEs to the adjusting module and the adjusting module. The adjusting module 54 obtains a CFI adjusting value according to the number of CCEs to be used for the common message scheduling, the number of CCEs to be used for the uplink grant scheduling, the number of CCEs to be used for the downlink grant scheduling, and a preset CFI adjusting formula, and adjusts the current CFI.
The adjusting module 55 obtains the downlink CCE usage ratio value according to the number of CCEs to be used for the common message scheduling, the number of CCEs to be used for the uplink grant scheduling, the number of CCEs to be used for the downlink grant scheduling, the total number of CCEs determined by the CFI adjusting formula, and the preset ratio adjusting direction relationship.
Since the principle of the apparatus according to embodiment 5 of the present invention is the same as that of the method according to embodiment 3, further details are not repeated herein for further explanation.
It should be noted that, in the embodiment of the present invention, the relevant functional module may be implemented by a hardware processor (hardware processor).
The device for dynamically adjusting CFI in a subframe according to embodiment 5 of the present invention obtains the number of CCEs to be used for common message scheduling, the number of CCEs to be used for uplink grant scheduling, and the number of CCEs to be used for downlink grant scheduling in a current scheduling subframe, obtains a CFI adjustment value according to each CCE number and a preset CFI adjustment formula, automatically adjusts the current CFI, and obtains a downlink CCE usage ratio value according to each CCE number and a ratio adjustment direction relationship, so as to update a corresponding CFI according to a real-time scheduling condition and reasonably allocate the number of uplink and downlink CCEs, avoid an influence of a common message on CFI adjustment statistics, and solve a problem of a low dynamic adjustment range of a CFI with a small bandwidth.
Fig. 5 shows an apparatus for dynamically adjusting CFI in a subframe according to embodiment 6 of the present invention, which includes: a processor 601, a memory 602, and a bus 603, wherein,
the processor and the memory are communicated with each other through the bus;
the memory stores program instructions executable by the processor to perform the methods provided by the method embodiments described above, including, for example: acquiring the number of CCEs to be used in public message scheduling in the current scheduling subframe; acquiring the number of CCEs to be used in uplink authorization scheduling in a current scheduling subframe; acquiring the number of CCEs to be used by downlink authorization scheduling in a current scheduling subframe; and obtaining a CFI (channel quality indicator) adjustment value according to the number of CCEs to be used in the public message scheduling, the number of CCEs to be used in the uplink authorization scheduling, the number of CCEs to be used in the downlink authorization scheduling and a preset CFI adjustment formula, and adjusting the current CFI.
Embodiment 7 of the present invention provides a non-transitory computer-readable storage medium, which stores computer instructions, where the computer instructions cause the computer to execute the methods provided by the above method embodiments, for example, including: acquiring the number of CCEs to be used in public message scheduling in the current scheduling subframe; acquiring the number of CCEs to be used in uplink authorization scheduling in a current scheduling subframe; acquiring the number of CCEs to be used by downlink authorization scheduling in a current scheduling subframe; and obtaining a CFI (channel quality indicator) adjustment value according to the number of CCEs to be used in the public message scheduling, the number of CCEs to be used in the uplink authorization scheduling, the number of CCEs to be used in the downlink authorization scheduling and a preset CFI adjustment formula, and adjusting the current CFI.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
Those of ordinary skill in the art will understand that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions and scope of the present invention as defined in the appended claims.

Claims (9)

1. A method for dynamic adjustment of CFI in a subframe, comprising:
acquiring the number of CCEs to be used in public message scheduling in the current scheduling subframe;
acquiring the number of CCEs to be used in uplink authorization scheduling in a current scheduling subframe;
acquiring the number of CCEs to be used by downlink authorization scheduling in a current scheduling subframe;
acquiring a CFI (channel control information) adjustment value according to the number of CCEs to be used in public message scheduling, the number of CCEs to be used in uplink authorization scheduling, the number of CCEs to be used in downlink authorization scheduling and a preset CFI adjustment formula, and adjusting the current CFI;
the CFI adjustment formula includes:
Figure FDA0002810857790000011
SCFI＝{cfi|NCCE(cfi)＞＝NCCE_PRE},cfi＝1...CFIMAX
Figure FDA0002810857790000012
NCCE_PRE＝NCCE_COM_PRE+NCCE_UL_PRE+NCCE_DL_PRE
wherein, CFI _ VALUE is the CFI VALUE finally determined and used by the current sub-frame, NCCE(CFI) is the total number of CCEs available for PDCCH in the current subframe when CFI equals CFI, CFIMAXIs the value upper limit of the CFI of the current subframe, SCFISatisfies N for the current subframeCCE(cfi)＞＝NCCE_PRE，cfi＝1...CFIMAXSet of CFIs under conditions, NCCE_PREThe total number of CCEs to be used for the current schedule.
2. The method of claim 1, further comprising:
and obtaining a downlink CCE use proportion value according to the number of CCEs to be used in the public message scheduling, the number of CCEs to be used in the uplink authorization scheduling, the number of CCEs to be used in the downlink authorization scheduling, the CCE total number determined by the CFI adjustment formula and a preset proportion adjustment direction relation.
3. The method according to claim 1, wherein the obtaining the number of CCEs to be used by uplink grant scheduling in the current scheduling subframe comprises:
determining whether the current subframe is an uplink grant schedulable subframe;
if the current subframe is determined to be an uplink schedulable subframe, acquiring the number of CCEs corresponding to the current subframe in the last scheduling record;
acquiring the number of CCEs corresponding to the last uplink scheduling subframe in the scheduling record;
acquiring the minimum CCE aggregation level permitted to be used by uplink scheduling;
and determining the number of CCEs corresponding to the current subframe in the last scheduling record, the number of CCEs corresponding to the last uplink scheduling subframe and the maximum value in the minimum CCE aggregation level used by the uplink scheduling permission as the number of CCEs to be used in uplink authorization scheduling in the current scheduling subframe.
4. The method according to claim 3, wherein the obtaining the number of CCEs to be used in downlink grant scheduling in the current scheduling subframe comprises:
acquiring the number of CCEs corresponding to the current subframe in the last scheduling record;
acquiring the number of CCEs corresponding to the last downlink scheduling subframe in the scheduling record;
acquiring the minimum CCE aggregation level permitted to be used by downlink scheduling;
and determining the number of CCEs corresponding to the current subframe in the last scheduling record, the number of CCEs corresponding to the last downlink scheduling subframe in the scheduling record and the maximum value in the minimum CCE aggregation level used by the downlink scheduling permission as the number of CCEs to be used in the downlink authorization scheduling in the current scheduling subframe.
5. The method of claim 2, wherein obtaining the downlink CCE usage ratio value according to the CCE number to be used for the common message scheduling, the CCE number to be used for the uplink grant scheduling, and the CCE number to be used for the downlink grant scheduling, the CCE total number determined by the CFI adjusting formula, and a preset ratio adjusting direction relationship comprises:
obtaining the current use information of the uplink CCE and the downlink CCE according to the CCE number to be used in the public message scheduling, the CCE number to be used in the uplink authorization scheduling and the CCE number to be used in the downlink authorization scheduling and the CCE total number determined by the CFI adjusting formula;
obtaining a direction adjustment strategy according to the current use information and the ratio adjustment direction relationship of the uplink CCE and the downlink CCE;
and obtaining a downlink CCE use proportion value according to the adjustment direction strategy and a preset proportion formula.
6. An apparatus for dynamically adjusting CFI in a subframe, comprising:
the first obtaining module is used for obtaining the number of CCEs to be used in public message scheduling in the current scheduling subframe;
the second obtaining module is used for obtaining the number of CCEs to be used in uplink authorization scheduling in the current scheduling subframe;
a third obtaining module, configured to obtain the number of CCEs to be used in downlink grant scheduling in the current scheduling subframe;
the adjusting module is used for obtaining a CFI adjusting value according to the number of CCEs to be used in public message scheduling, the number of CCEs to be used in uplink authorization scheduling, the number of CCEs to be used in downlink authorization scheduling and a preset CFI adjusting formula, and adjusting the current CFI;
the CFI adjustment formula includes:
Figure FDA0002810857790000031
SCFI＝{cfi|NCCE(cfi)＞＝NCCE_PRE},cfi＝1...CFIMAX
Figure FDA0002810857790000032
NCCE_PRE＝NCCE_COM_PRE+NCCE_UL_PRE+NCCE_DL_PRE
wherein, CFI _ VALUE is the CFI VALUE finally determined and used by the current sub-frame, NCCE(CFI) is the total number of CCEs available for PDCCH in the current subframe when CFI equals CFI, CFIMAXIs the value upper limit of the CFI of the current subframe, SCFISatisfies N for the current subframeCCE(cfi)＞＝NCCE_PRE，cfi＝1...CFIMAXSet of CFIs under conditions, NCCE_PREThe total number of CCEs to be used for the current schedule.
7. The apparatus of claim 6, further comprising a calculating module, configured to obtain a downlink CCE usage ratio value according to the number of CCEs to be used for the common message scheduling, the number of CCEs to be used for the uplink grant scheduling, the number of CCEs to be used for the downlink grant scheduling, the total number of CCEs determined by the CFI adjustment formula, and a preset ratio adjustment direction relationship.
8. An apparatus for dynamically adjusting CFI in a subframe, comprising: a processor, a memory, and a bus, wherein,
the processor and the memory are communicated with each other through the bus;
the memory stores program instructions executable by the processor, the processor invoking the program instructions to perform the method of any of claims 1 to 5.
9. A non-transitory computer-readable storage medium storing computer instructions that cause a computer to perform the method of any one of claims 1 to 5.
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