CN105846974B

CN105846974B - Method and equipment for configuring control channel resources

Info

Publication number: CN105846974B
Application number: CN201510014412.5A
Authority: CN
Inventors: 顾蔚
Original assignee: China Mobile Group Shanghai Co Ltd
Current assignee: China Mobile Group Shanghai Co Ltd
Priority date: 2015-01-12
Filing date: 2015-01-12
Publication date: 2020-02-18
Anticipated expiration: 2035-01-12
Also published as: CN105846974A

Abstract

The invention discloses a method and equipment for configuring control channel resources, which are used for solving the problems that a base station determines the CCE polymerization degree of each DCI according to a broadband CQI reported by a terminal and the determined CCE polymerization degree is inaccurate in the prior art. The method of the invention comprises the following steps: determining a CCE polymerization degree corresponding to a terminal according to DCI of the terminal aiming at a terminal needing to be scheduled in the current TTI; determining the coding rate corresponding to the CQI of a specific sub-band of the terminal according to the preset corresponding relation between the CQI and the coding rate; adjusting the CCE polymerization degree corresponding to the terminal according to the determined coding rate of the terminal; after the CCE polymerization degree corresponding to each terminal needing to be scheduled in the current TTI is adjusted, control channel resources are configured for each terminal according to the adjusted CCE polymerization degree corresponding to each terminal. The method of the invention can make the polymerization degree of the CCE more accurate after adjustment.

Description

Method and equipment for configuring control channel resources

Technical Field

The present invention relates to the field of wireless communications technologies, and in particular, to a method and a device for configuring control channel resources.

Background

At present, the configuration of PDCCH (Physical Downlink Control Channel) symbol number of a base station is configured globally according to a uniform template when the base station is started, the configuration of all base stations is consistent, or the base stations are simply distinguished according to urban areas and suburban areas, and different PDCCH symbol numbers are configured for the distinguished base stations.

When a terminal under a base station needs to be scheduled, the base station determines a CCE (Control Channel Element) aggregation level of each piece of DCI (Downlink Control information) according to a wideband CQI (Channel Quality Indicator) reported by the terminal that needs to be scheduled, where the CCE aggregation level includes: 1. 2, 4 and 8, the base station configures control channel resources for the terminal needing to be scheduled according to the determined CCE polymerization degree, and the terminal performs scheduling according to the control channel resources configured by the base station.

In the prior art, when a terminal reports a channel quality indication to a base station, only one CQI value is used to represent the channel quality indications of all sub-bands in the entire bandwidth, and no matter whether the terminal reports the maximum wideband CQI or the minimum wideband CQI, the bandwidth CQI finally obtained by the base station cannot truly reflect the relationship between the terminal and the channel quality indication of each sub-band between the base station, so that the base station determines the CCE aggregation level of each piece of DCI according to the wideband CQI reported by the terminal, and the determined CCE aggregation level is inaccurate.

In summary, the current base station determines the CCE aggregation level of each piece of DCI according to the wideband CQI reported by the terminal, and the determined CCE aggregation level is not accurate.

Disclosure of Invention

The invention provides a method and equipment for configuring control channel resources, which are used for solving the problems that in the prior art, a base station determines the CCE polymerization degree of each DCI according to a wideband CQI reported by a terminal, and the determined CCE polymerization degree is inaccurate.

The embodiment of the invention provides a method for configuring control channel resources, which comprises the following steps:

aiming at a terminal which needs to be scheduled in a current transmission time interval TTI, determining a Control Channel Element (CCE) polymerization degree corresponding to the terminal according to Downlink Control Information (DCI) of the terminal;

determining a coding rate corresponding to a CQI of a specific sub-band of the terminal according to a preset corresponding relation between a CQI and the coding rate, wherein the specific sub-band is a sub-band selected from all sub-bands corresponding to all sub-band CQIs reported by the terminal;

adjusting the CCE polymerization degree corresponding to the terminal according to the determined coding rate of the terminal;

after adjusting the CCE polymerization degree corresponding to each terminal needing to be scheduled in the current TTI, configuring control channel resources for each terminal according to the adjusted CCE polymerization degree corresponding to each terminal.

According to the embodiment of the invention, after the CCE polymerization degree corresponding to the terminal is determined according to the DCI of the terminal, the coding rate corresponding to the terminal is determined according to the CQI of the specific sub-band reported by the terminal, and the CCE polymerization degree is adjusted according to the determined coding rate, wherein the CQI of the specific sub-band really reflects the relation between the base station and the channel quality indication of each sub-band, so that the adjusted CCE polymerization degree is more accurate.

Preferably, the specific sub-band of the terminal is determined according to the following manner:

according to the measured physical resource block PRB granularity receiving interference power, correcting the CQI of each sub-band reported by the terminal;

and according to the corrected CQI and the determined specific sub-band of the other terminal, one sub-band selected from all sub-bands corresponding to all sub-band CQIs reported by the terminal is used as the specific sub-band of the terminal.

According to the embodiment of the invention, the CQI of each sub-band reported by the terminal is corrected according to the measured PRB granularity received interference power, so that the corrected CQI of the sub-band can reflect the relation of the channel quality indication of the base station and each sub-band more truly, and one of all sub-bands of the terminal is selected as a specific sub-band according to the determined specific sub-bands of other terminals, so that the selected specific sub-band is a better sub-band.

Preferably, adjusting the CCE aggregation level corresponding to the terminal according to the determined coding rate of the terminal includes:

determining a Modulation and Coding Scheme (MCS) according to the determined coding rate of the terminal, and determining a modulation mode according to the determined MCS;

and adjusting the CCE polymerization degree corresponding to the terminal according to the determined modulation mode.

The embodiment of the invention determines the MCS according to the coding rate of the terminal, and then determines the modulation mode according to the determined MCS, so that the adjustment of the CCE polymerization degree is carried out according to the modulation mode.

Preferably, configuring a control channel resource for each terminal according to the adjusted CCE aggregation level corresponding to each terminal, includes:

if the CCE polymerization degree is the uplink CCE polymerization degree, configuring uplink control channel resources for each terminal after determining that the uplink CCE number is fully allocated according to the adjusted uplink CCE polymerization degree and the adjusted uplink CCE total number corresponding to each terminal; or

And if the CCE polymerization degree is the downlink CCE polymerization degree, configuring downlink control channel resources for each terminal after determining that the downlink CCE number is fully configured according to the adjusted downlink CCE polymerization degree and the adjusted downlink CCE total number corresponding to each terminal.

Preferably, after adjusting the CCE aggregation level corresponding to each terminal that needs to be scheduled in the current TTI, before configuring a control channel resource for each terminal according to the adjusted CCE aggregation level corresponding to each terminal, the method further includes:

if the CCE polymerization degrees are uplink CCE polymerization degrees, after the uplink CCE polymerization degrees corresponding to each terminal which needs to be scheduled in the current TTI are adjusted, if the number of the uplink CCE is not fully matched, adjusting the uplink CCE polymerization degrees corresponding to part or all of the terminals until the uplink CCE polymerization degrees are fully matched;

if the CCE polymerization degrees are downlink CCE polymerization degrees, after the downlink CCE polymerization degree corresponding to each terminal which needs to be scheduled in the current TTI is adjusted, if the number of the downlink CCE is not fully matched, the downlink CCE polymerization degrees corresponding to part or all of the terminals are adjusted until the downlink CCE polymerization degree is fully matched.

According to the embodiment of the invention, after the adjusted CCE polymerization degree is obtained, when the number of the uplink CCE or the number of the downlink CCE is not full, part or all of the adjusted CCE polymerization degree is adjusted again, so that the purpose of improving the CCE polymerization degree grade is achieved, and the CCE can be effectively utilized.

Preferably, the total number of uplink CCEs and the total number of downlink CCEs are determined according to the following manner:

determining a first PDCCH symbol quantity corresponding to a CCE quantity range to which the initial CCE total number belongs according to the corresponding relation between the CCE quantity range and the PDCCH symbol quantity of the physical downlink control channel;

determining the number of second PDCCH symbols according to the number of currently activated terminals, the number of specifically activated terminals and the determined number of first PDCCH symbols, wherein the number of specifically activated terminals is determined according to the activation ratio of the number of busy hour access users in a service model and the number of currently accessed terminals;

determining the number of CCEs corresponding to the second PDCCH symbol number according to the corresponding relation between the CCE number range and the PDCCH symbol number and the resource unit RE occupied by other control planes;

and determining the total number of the uplink CCE and the total number of the downlink CCE according to the determined number of the CCEs and the CCE usage ratio of the busy-time uplink PDCCH and the busy-time downlink PDCCH in the service model.

Preferably, the initial CCE total is determined in the following manner:

determining the number of the specifically activated terminals according to the number activation ratio of busy hour access users and the number of the currently accessed terminals in the service model;

determining the number of activated terminals under different CCE polymerization degrees according to the user number ratio under different CCE polymerization degrees and the number of the specifically activated terminals;

and determining the total number of the initial CCE according to the number of the activated terminals under different CCE polymerization degrees.

Preferably, determining the second PDCCH symbol number according to the currently activated number of terminals, the specifically activated number of terminals, and the determined first PDCCH symbol number includes:

judging whether the determined number of the first PDCCH symbols needs to be adjusted or not according to the number of the currently activated terminals and the number of the specifically activated terminals;

if so, taking the adjusted first PDCCH symbol number as a second PDCCH symbol number;

otherwise, the determined first PDCCH symbol number is used as a second PDCCH symbol number.

Preferably, the determining whether the determined number of the first PDCCH symbols needs to be adjusted according to the number of currently activated terminals and the number of specifically activated terminals includes:

if the number of the currently activated terminals is larger than the number of the specifically activated terminals and the number of the first PDCCH symbols is within a set symbol number range, determining that the number of the determined first PDCCH symbols needs to be adjusted; or

And if the number of the currently activated terminals is not more than the number of the specifically activated terminals, the throughput rate of the user in the previous TTI is not more than the throughput rate of the user activated in busy hour in the service model, and the first PDCCH symbol number is in a set symbol number range, determining that the determined PDCCH symbol number needs to be adjusted.

The embodiment of the invention can adjust the number of the first PDCCH symbols, so that the control resources provided by the adjusted number of the PDCCH symbols can better meet the current requirement.

Preferably, the adjusting the determined first PDCCH symbol number includes:

if the number of the currently activated terminals is larger than the number of the specifically activated terminals and the number of the first PDCCH symbols is within a set symbol number range, adjusting a step value according to the number of the symbols, and increasing the number of the first PDCCH symbols; or

And if the number of the currently activated terminals is not more than the number of the specifically activated terminals, the throughput rate of the user in the previous TTI is not more than the throughput rate of the user activated in busy hour in the service model, and the number of the first PDCCH symbols is within a set symbol number range, adjusting the step value according to the number of the symbols, and reducing the number of the first PDCCH symbols.

According to the embodiment of the invention, when the control resources provided by the first PDCCH symbol number can not meet the current requirement, the first PDCCH symbol number is increased, so that the provided control resources can meet the current requirement after the PDCCH symbol number is increased; when the control resources provided by the first PDCCH symbol number can meet the current requirements but cannot be fully utilized, the first PDCCH symbol number is reduced, and the traffic channel resources are increased by releasing part of the control channel resources, thereby increasing the traffic rate.

Preferably, before configuring the control channel resource for each terminal according to the adjusted CCE aggregation level corresponding to each terminal, the method further includes:

aiming at a terminal needing to be scheduled in the current TTI, determining the allocation starting position of the terminal in a specific sub-band according to the specific sub-band of the terminal, the adjusted CCE polymerization degree and the CCE polymerization degrees of other terminals which are the same as the specific sub-band of the terminal;

configuring a control channel resource for each terminal according to the adjusted CCE polymerization degree corresponding to each terminal, including:

and configuring control channel resources for each terminal according to the adjusted CCE polymerization degree corresponding to each terminal and the determined distribution starting position of each terminal in a specific sub-band.

Preferably, the busy hour uplink and downlink PDCCH CCE usage ratio is determined according to the following modes:

and determining the usage proportion of the busy hour uplink and downlink PDCCH CCEs according to the usage proportion of the busy hour downlink PDCCH CCEs and the usage proportion of the busy hour uplink PDCCH CCEs in the service model.

The embodiment of the invention provides equipment for configuring control channel resources, which comprises:

a first determining module, configured to determine, for a terminal that needs to be scheduled in a current transmission time interval TTI, a control channel element CCE aggregation level corresponding to the terminal according to downlink control information DCI of the terminal;

a second determining module, configured to determine, according to a preset correspondence between a Channel Quality Indicator (CQI) and a coding rate, a coding rate corresponding to the CQI of a specific sub-band of the terminal, where the specific sub-band is a sub-band selected from all sub-bands corresponding to all sub-band CQIs reported by the terminal;

the adjusting module is used for adjusting the CCE polymerization degree corresponding to the terminal according to the determined coding rate of the terminal;

and the configuration module is used for configuring control channel resources for each terminal according to the adjusted CCE polymerization degree corresponding to each terminal after the CCE polymerization degree corresponding to each terminal which needs to be scheduled in the current TTI is adjusted.

Preferably, the second determining module is further configured to:

Preferably, the adjusting module is specifically configured to:

Preferably, the configuration module is specifically configured to:

Preferably, the configuration module is further configured to:

Preferably, the configuration module is specifically configured to:

Preferably, the configuration module is further configured to:

the configuration module is specifically configured to:

Preferably, the configuration module is further configured to:

Drawings

Fig. 1 is a flowchart illustrating a method for allocating control channel resources according to an embodiment of the present invention;

fig. 2 is a diagram of specific sub-bands of a second terminal 1, a second terminal 2, and a second terminal 3 according to an embodiment of the present invention;

fig. 3 is a diagram of specific sub-bands of a terminal 1, a terminal 2, and a terminal 3 according to an embodiment of the present invention;

fig. 4 is a schematic diagram of four CCE quantity allocation according to an embodiment of the present invention;

fig. 5 is a schematic diagram of five CCE quantity allocation according to an embodiment of the present invention;

fig. 6 is a schematic diagram illustrating a sixth embodiment of the present invention for determining an allocation start position of the terminal 3 in a specific sub-band;

fig. 7 is a flowchart illustrating a method for allocating control channel resources according to a seventh embodiment of the present invention;

fig. 8 is a schematic structural diagram of an apparatus for eight-configuration of control channel resources according to an embodiment of the present invention.

Detailed Description

The embodiment of the invention aims at a terminal needing to be scheduled in the current TTI (Transmission Time Interval), and determines the CCE polymerization degree corresponding to the terminal according to DCI of the terminal; determining a coding rate corresponding to the CQI of a specific sub-band of the terminal according to a preset corresponding relation between the CQI and the coding rate, wherein the specific sub-band is a sub-band selected from all sub-bands corresponding to all sub-band CQIs reported by the terminal; adjusting the CCE polymerization degree corresponding to the terminal according to the determined coding rate of the terminal; after adjusting the CCE polymerization degree corresponding to each terminal needing to be scheduled in the current TTI, configuring control channel resources for each terminal according to the adjusted CCE polymerization degree corresponding to each terminal. According to the embodiment of the invention, after the CCE polymerization degree corresponding to the terminal is determined according to the DCI of the terminal, the coding rate corresponding to the terminal is determined according to the CQI of the specific sub-band reported by the terminal, and the CCE polymerization degree is adjusted according to the determined coding rate, wherein the CQI of the specific sub-band really reflects the relation between the base station and the channel quality indication of each sub-band, so that the adjusted CCE polymerization degree is more accurate.

The embodiments of the present invention will be described in further detail with reference to the drawings attached hereto.

As shown in fig. 1, a method for configuring control channel resources according to an embodiment of the present invention includes:

step 100, aiming at a terminal needing to be scheduled in the current TTI, determining a CCE polymerization degree corresponding to the terminal according to DCI of the terminal;

step 101, determining a coding rate corresponding to a CQI of a specific sub-band of the terminal according to a preset correspondence between the CQI and the coding rate, wherein the specific sub-band is a sub-band selected from all sub-bands corresponding to all sub-band CQIs reported by the terminal;

step 102, adjusting the CCE polymerization degree corresponding to the terminal according to the determined coding rate of the terminal;

step 103, after adjusting the CCE aggregation level corresponding to each terminal that needs to be scheduled in the current TTI, configuring a control channel resource for each terminal according to the adjusted CCE aggregation level corresponding to each terminal.

The TTI can be obtained according to simulation or set according to experience in the embodiment of the invention.

In the embodiment of the invention, when a plurality of terminals need to be scheduled in the current TTI, the priorities can be set for the plurality of terminals according to the following modes so as to allocate control channel resources to each terminal in sequence according to the priority sequence of the terminal:

the first method is as follows: setting a priority for each terminal according to the sequence of the request for acquiring the control channel resources initiated by the terminal, and then allocating the control channel resources for the terminal with the high priority.

For example: the sequence of the requests for acquiring the control channel resources initiated by the terminal 1, the terminal 2, the terminal 3, the terminal 4 and the terminal 5 is the terminal 4, the terminal 2, the terminal 3, the terminal 5 and the terminal 1, the control channel resources are firstly allocated to the terminal 4, and the control channel resources are sequentially allocated to the terminal 2, the terminal 3, the terminal 5 and the terminal 1.

The second method comprises the following steps: setting a priority for each terminal according to the sequence of requests for acquiring control channel resources initiated by the terminal and the QCI (Quality of Service) level Identifier of the terminal request Service, and then allocating control channel resources to the terminal with the high priority.

For example: the sequence of the request for acquiring the control channel resource initiated by the terminal 1, the terminal 2, the terminal 3, the terminal 4 and the terminal 5 is as follows: terminal 4, terminal 2, terminal 3, terminal 5 and terminal 1, and the sequence of QCI levels of the terminal request service is: the QCIs for requesting the services of the terminal 3, the terminal 2, the terminal 1, the terminal 4 and the terminal 5 are determined according to the sequence for initiating the requests for obtaining the control channel resources and the QCI grade of the requested services, the control channel resources are firstly distributed for the terminal 3, and the control channel resources are sequentially distributed for the terminal 2, the terminal 4, the terminal 1 and the terminal 5.

After receiving all sub-band CQIs reported by the terminal, the embodiment of the present invention selects one sub-band from the sub-bands as a specific sub-band of the terminal, and the specific sub-band determining manner of the terminal is as follows:

receiving interference power according to the measured granularity of a Physical Resource Block (PRB), and correcting the CQI of each sub-band reported by the terminal;

For example: in a 20M bandwidth system, each of the 4 subbands reported by terminal 1 includes 8 consecutive PRBs. Acquiring an arithmetic average value 1 of 8 PRB granularity received interference powers measured corresponding to 8 continuous PRBs in a subband 1, taking the arithmetic average value as the received interference power 1 of the subband 1, and performing weighting correction on the CQI of the subband 1 according to the received interference power 1; acquiring an arithmetic average value 2 of 8 PRB granularity received interference powers measured corresponding to 8 continuous PRBs in a subband 2, taking the arithmetic average value as the received interference power 2 of the subband 2, and performing weighting correction on the CQI of the subband 2 according to the received interference power 2; acquiring an arithmetic average value 3 of 8 PRB granularity received interference powers measured corresponding to 8 continuous PRBs in a subband 3, taking the arithmetic average value as the received interference power 3 of the subband 3, and performing weighting correction on a CQI of the subband 3 according to the received interference power 3; and acquiring an arithmetic average 4 of the measured 8 PRB granularity received interference powers corresponding to 8 continuous PRBs in the subband 4, taking the arithmetic average 4 as the received interference power 4 of the subband 4, and performing weighting correction on the CQI of the subband 4 according to the received interference power 4. The subband 3 is selected as the specific subband of terminal 1 from the modified

subbands

1, 2, 3, 4 and the determined specific subbands of other terminals.

According to the sub-band after the CQI is corrected and the determined specific sub-bands of other terminals, the terminal selects one sub-band from all sub-bands corresponding to all sub-band CQI reported by the terminal as the specific sub-band of the terminal, and the selected specific sub-band can be the optimal sub-band or the suboptimal sub-band.

The embodiment of the invention can adopt the following modes to judge whether the suboptimal sub-band is selected as the specific sub-band for the terminal:

the first method is as follows:

setting a first terminal number of a specific sub-band which can take the sub-band as a terminal for each sub-band, and when the specific sub-band is selected for a terminal, if the optimal sub-band of the terminal is already taken as the specific sub-band by other terminals and the terminal number taking the sub-band as the specific sub-band reaches the first terminal number set by the sub-band, selecting a second optimal sub-band as the specific sub-band for the terminal.

As shown in fig. 2, which is a schematic diagram of specific subbands of a terminal 1, a terminal 2, and a terminal 3 according to an embodiment of the present invention, it can be seen from fig. 2 that the subbands reported by the terminal 1 are subband 1, subband 2, and subband 3, the subbands reported by the terminal 2 are subband 2, subband 3, and subband 4, and the subbands reported by the terminal 3 are subband 3, subband 4, and subband 5. Sequencing 3 sub-bands reported by the terminal 1 according to the numerical value of the CQI in a descending order, wherein the sequence of the sequenced sub-bands CQI is as follows: subband 3, subband 1, and subband 2; sequencing 3 sub-bands reported by the terminal 2 according to the numerical value of the CQI in a descending order, wherein the sequence of the sequenced sub-bands CQI is as follows: subband 3, subband 2, and subband 4; sequencing 3 sub-bands reported by the terminal 3 according to the numerical value of the CQI in a descending order, wherein the sequence of the sequenced sub-band CQI is as follows: subband 3, subband 4, and subband 5. It can be known that the optimal subbands of the three terminals are all subband 3, but subband 3 has been allocated to terminal 1 and terminal 2 as a specific subband, and the first terminal number of subband 3 at this time is 2, so terminal 3 has sub-optimal subband 4 as a specific subband, where subband 4 is not allocated to any terminal.

The second method comprises the following steps:

setting a first PRB number value for each subband, and when a specific subband is selected for a terminal, if the remaining PRB number of the optimal subband of the terminal is less than the first PRB number value, selecting a second optimal subband as the specific subband for the terminal.

As shown in fig. 3, which is a schematic diagram of specific subbands of a terminal 1, a terminal 2, and a terminal 3 according to the third embodiment of the present invention, it can be seen from fig. 3 that the subbands reported by the terminal 1 are subband 1, subband 2, and subband 3, the subbands reported by the terminal 2 are subband 2, subband 3, and subband 4, and the subbands reported by the terminal 3 are subband 3, subband 4, and subband 5. Sequencing 3 sub-bands reported by the terminal 1 according to the numerical value of the CQI in a descending order, wherein the sequence of the sequenced sub-bands CQI is as follows: subband 3, subband 1, and subband 2; sequencing 3 sub-bands reported by the terminal 2 according to the numerical value of the CQI in a descending order, wherein the sequence of the sequenced sub-bands CQI is as follows: subband 3, subband 2, and subband 4; sequencing 3 sub-bands reported by the terminal 3 according to the numerical value of the CQI in a descending order, wherein the sequence of the sequenced sub-band CQI is as follows: subband 3, subband 4, and subband 5. It can be known that the optimal subbands of the three terminals are all subband 3, the first PRB number value of subband 3 is 2, at this time, subband 3 has been allocated to terminal 1 and terminal 2 as a specific subband, and the remaining PRB number of subband 3 is 1, which is smaller than the first PRB number value, therefore, terminal 3 takes sub-optimal subband 4 as a specific subband, where the remaining PRB number of subband 4 is 4, which is greater than the first PRB number value 2 of subband 4.

The specific method for adjusting the CCE polymerization degree corresponding to the terminal according to the determined coding rate of the terminal comprises the following steps:

In the embodiment of the present invention, when a terminal initiates a request for acquiring uplink control channel resources, a CCE aggregation level corresponding to the terminal is an uplink CCE aggregation level, and when the terminal initiates a request for acquiring downlink control channel resources, a CCE aggregation level corresponding to the terminal is a downlink CCE aggregation level, and specifically, according to differences in CCE aggregation levels, implementation manners for configuring control channel resources for the terminal are also different:

the first method is as follows: when a terminal initiates a request for acquiring uplink control channel resources, the CCE polymerization degree corresponding to the terminal is the uplink CCE polymerization degree;

if the CCE polymerization degree is the uplink CCE polymerization degree, configuring uplink control channel resources for each terminal after determining that the uplink CCE number is fully allocated according to the adjusted uplink CCE polymerization degree and the adjusted uplink CCE total number corresponding to each terminal;

the full allocation of the number of the uplink CCEs in the embodiment of the invention refers to that: the uplink CCE quantities are allocated to the terminal entirely or the uplink CCE quantities are allocated to the terminal partially, and the unallocated uplink CCE quantities cannot be continuously allocated to the terminal.

After the CCE aggregation degrees corresponding to each terminal that needs to be scheduled in the current TTI are adjusted, when the CCE number is not full, the embodiment of the present invention may adjust uplink CCE aggregation degrees corresponding to some or all terminals until the CCE aggregation degrees are full, and the specific implementation manner is:

the second method comprises the following steps: when a terminal initiates a request for acquiring downlink control channel resources, the CCE polymerization degree corresponding to the terminal is the downlink CCE polymerization degree;

The full allocation of the downlink CCE quantity in the embodiment of the invention refers to that: the downlink CCE number is allocated to the terminal in its entirety, or the downlink CCE number is partially allocated to the terminal, and an unallocated downlink CCE number cannot be continuously allocated to the terminal.

After the CCE aggregation level corresponding to each terminal that needs to be scheduled in the current TTI is adjusted, when the CCE number is not full, the embodiment of the present invention may adjust downlink CCE aggregation levels corresponding to some or all terminals until the CCE aggregation levels are full, and the specific implementation manner is:

When the number of the uplink CCEs or the number of the downlink CCEs is not full, the uplink CCE polymerization degrees or the downlink CCE polymerization degrees corresponding to part or all of the terminals are adjusted, if the CCE polymerization degrees are not graded, the uplink CCE polymerization degrees or the downlink CCE polymerization degrees can be adjusted according to the uplink adjustment step value or the downlink adjustment step value until the CCE polymerization degrees are full, wherein the uplink adjustment step value or the downlink adjustment step value can be obtained according to simulation, and can also be set according to experience; if the CCE aggregation level is a CCE aggregation level in the prior art, the CCE aggregation levels are ranked, and the CCE aggregation levels are 1, 2, 4, and 8, where a CCE aggregation level of 1 indicates that the number of CCEs is 1, a CCE aggregation level of 2 indicates that the number of CCEs is 2, a CCE aggregation level of 4 indicates that the number of CCEs is 4, and a CCE aggregation level of 8 indicates that the number of CCEs is 8, and when adjusting the uplink CCE aggregation level or the downlink CCE aggregation level, only one-level up adjustment is required until full allocation.

As shown in fig. 4, a diagram of four CCE quantity allocation according to an embodiment of the present invention is shown, and as can be seen from fig. 4, terminal 1 is allocated with CCEs No. 1 to 4, terminal 2 is allocated with CCEs No. 5 to 6, terminal 3 is allocated with CCEs No. 7, the CCE quantities are all allocated to the terminals, and the CCE quantities are fully allocated.

As shown in fig. 5, a schematic diagram of allocating the number of five CCEs according to the embodiment of the present invention, as can be seen from fig. 5, terminal 1 is allocated with CCEs No. 1 to 4, and terminal 2 is allocated with CCEs No. 5 to 6, but CCE No. 7 is not allocated.

For example: in fig. 5, if the CCE aggregation level is not graded, CCE No. 7 may be allocated to terminal 2, and after allocation, the CCE number is fully allocated.

Another example is: in fig. 5, if the CCE aggregation levels are ranked, the CCE aggregation level of terminal 2 is 2, and the next rank of the CCE aggregation level of terminal 2 is 4, so that CCE No. 7 cannot be allocated to terminal 2, and the CCE number is fully allocated.

The method for determining the total number of the uplink CCEs and the total number of the downlink CCEs comprises the following steps:

determining a first PDCCH symbol quantity corresponding to the CCE quantity range to which the initial CCE total number belongs according to the corresponding relation between the CCE quantity range and the PDCCH symbol quantity;

The method for determining the initial CCE total number comprises the following steps:

For example: the number of the currently accessed terminals is 60, and the number activation ratio of the busy access users is 1: 3, the number of terminals specifically activated is 20. In this case, the ratio of the number of users at different CCE aggregation levels is 10%: 35%: 45%: 10%, the number of specifically activated terminals with a CCE aggregation level of 1 is 2, the number of specifically activated terminals with a CCE aggregation level of 2 is 7, the number of specifically activated terminals with a CCE aggregation level of 4 is 9, and the number of specifically activated terminals with a CCE aggregation level of 8 is 2. The number of CCEs required for a specific active terminal with a CCE aggregation level of 1 is 2, the number of CCEs required for a specific active terminal with a CCE aggregation level of 2 is 14, the number of CCEs required for a specific active terminal with a CCE aggregation level of 4 is 36, and the number of CCEs required for a specific active terminal with a CCE aggregation level of 8 is 16, and then the initial CCE total number is 2+14+36+16 — 68.

The implementation manner of determining the number of the second PDCCH symbols according to the number of currently activated terminals, the number of specifically activated terminals, and the determined number of the first PDCCH symbols in the embodiment of the present invention is as follows:

For example: and if the number of the currently activated terminals is larger than the number of the specifically activated terminals, adjusting the number of the first PDCCH symbols, and taking the adjusted number of the first PDCCH symbols as the number of the second PDCCH symbols.

Another example is: and if the number of the currently activated terminals is not more than the number of the specifically activated terminals, not adjusting the number of the first PDCCH symbols, and taking the number of the first PDCCH symbols as the number of the second PDCCH symbols.

The specific judgment method for judging whether the determined first PDCCH symbol number needs to be adjusted according to the number of currently activated terminals and the number of specifically activated terminals in the embodiment of the present invention is as follows:

the first method is as follows:

For example: the number of the currently activated terminals is 50, the number of the specifically activated terminals is 40, the number of the currently activated terminals is greater than the number of the specifically activated terminals, at the moment, the number of the first PDCCH symbols is 3, the range of the number of the set symbols is 1-4, and the number of the first PDCCH symbols is between the range of the number of the set symbols, so that the determined number of the first PDCCH symbols is determined to be required to be adjusted.

Another example is: the number of currently activated terminals is 50, the number of specifically activated terminals is 40, the number of currently activated terminals is greater than the number of specifically activated terminals, at the moment, the number of first PDCCH symbols is 4, the range of the number of set symbols is 1-4, and the number of first PDCCH symbols is not in the range of the number of set symbols, so that it is determined that the number of determined first PDCCH symbols does not need to be adjusted.

The specific implementation manner of adjusting the number of the first PDCCH symbols in the embodiment of the present invention is as follows:

For example: the number of currently activated terminals is 50, the number of specifically activated terminals is 40, the number of currently activated terminals is greater than the number of specifically activated terminals, and at this time, the number of first PDCCH symbols is 3, the range of the set number of symbols is 1-4, the number of first PDCCH symbols is between the range of the set number of symbols, and then the step value (1) is adjusted according to the number of symbols, and the number of first PDCCH symbols is adjusted to 4.

The second method comprises the following steps:

For example: the number of currently activated terminals is 30, the number of specifically activated terminals is 40, the number of currently activated terminals is not greater than the number of specifically activated terminals, and at this time, the number of first PDCCH symbols is 3, the range of the number of set symbols is 1-4, and the number of first PDCCH symbols is in the range of the number of set symbols, it is determined that the number of determined first PDCCH symbols needs to be adjusted.

Another example is: the number of currently activated terminals is 30, the number of specifically activated terminals is 40, the number of currently activated terminals is not greater than the number of specifically activated terminals, at this time, the number of first PDCCH symbols is 1, the range of the number of set symbols is 1-4, and the number of first PDCCH symbols is not in the range of the number of set symbols, so that it is determined that the number of determined first PDCCH symbols does not need to be adjusted.

For example: the number of currently activated terminals is 30, the number of specifically activated terminals is 40, the number of currently activated terminals is not greater than the number of specifically activated terminals, and at this time, the number of first PDCCH symbols is 3, the range of the set number of symbols is 1-4, the number of first PDCCH symbols is between the range of the set number of symbols, and then the step value (1) is adjusted according to the number of symbols, and the number of first PDCCH symbols is adjusted to 2.

In the embodiment of the present invention, after the CCE aggregation level corresponding to the terminal is adjusted, the adjusted CCE aggregation level is obtained, and an allocation starting position of the terminal in a specific subband needs to be determined according to the adjusted CCE aggregation level, which is specifically implemented in the following manner:

as shown in fig. 6, a schematic diagram of sixth embodiment of the present invention is to determine an allocation starting position of a terminal 3 in a specific subband, and as can be seen from fig. 6, the specific subband of the terminal 3 is subband 1, an adjusted CCE aggregation level of the terminal 3 is 4, and after a position 1 and a position 2 of the subband 1 have been allocated to the terminal 1, the position 3 of the subband 1 is taken as the allocation starting position of the terminal 3 in the subband 1.

The specific method for determining the CCE usage proportion of the uplink PDCCH and the downlink PDCCH in busy hour of the embodiment of the invention comprises the following steps:

As shown in fig. 7, a method for configuring control channel resources according to the seventh embodiment of the present invention includes:

step 700, the base station determines the number of the specific activated terminals according to the activation ratio of the number of the busy hour access users and the number of the currently accessed terminals in the service model.

Step 701, the base station determines the number of terminals activated under different CCE aggregation levels according to the user number proportion and the number of terminals specifically activated under different CCE aggregation levels, and determines the total number of initial CCEs according to the number of terminals activated under different CCE aggregation levels.

Step 702, the base station determines the first PDCCH symbol number corresponding to the CCE number range to which the initial CCE total number belongs according to the corresponding relation between the CCE number range and the PDCCH symbol number.

Step 703, the base station judges whether the number of the currently activated terminals is greater than the number of the specifically activated terminals per TTI, if yes, step 707 is executed; if not, go to step 704.

Step 704, the base station judges whether the user throughput rate of the previous TTI is greater than the throughput rate of each activated user in busy hour in the service model, if yes, step 709 is executed; if not, go to step 705.

705, the base station judges whether the first PDCCH symbol number is in the set symbol number range, if yes, the step 706 is executed; if not, go to step 709.

Step 706, the base station adjusts the step value according to the number of symbols, reduces the number of first PDCCH symbols, uses the adjusted number of first PDCCH symbols as the number of second PDCCH symbols, and executes step 710.

Step 707, the base station determines whether the first PDCCH symbol number is within the set symbol number range, if yes, step 708 is executed; if not, go to step 709.

Step 708, the base station adjusts the step value according to the number of symbols, increases the number of first PDCCH symbols, uses the adjusted number of first PDCCH symbols as the number of second PDCCH symbols, and executes step 710.

In step 709, the base station performs step 710 by using the first PDCCH symbol number as the second PDCCH symbol number.

Step 710, the base station determines the CCE number corresponding to the second PDCCH symbol number according to the correspondence between the CCE number range and the PDCCH symbol number and the resource element RE occupied by other control planes.

And 711, determining the total number of the uplink CCE and the total number of the downlink CCE by the base station according to the determined number of the CCEs and the usage ratio of the uplink and downlink CCEs in busy hours in the service model.

In step 711, the busy hour uplink and downlink PDCCH CCE usage ratio may be determined according to the busy hour downlink PDCCH CCE usage ratio and the busy hour uplink PDCCH CCE usage ratio in the service model.

And 712, determining a CCE polymerization degree corresponding to the terminal according to DCI of the terminal for a terminal that needs to be scheduled in the current TTI.

Step 713, determining the coding rate corresponding to the CQI of the specific sub-band of the terminal according to the preset correspondence between the CQI and the coding rate.

And 714, adjusting the CCE polymerization degree corresponding to the terminal according to the determined coding rate of the terminal.

And 715, determining the allocation starting position of the terminal in the specific subband according to the specific subband of the terminal, the adjusted CCE aggregation levels and CCE aggregation levels of other terminals which are the same as the specific subband of the terminal.

Step 716, configuring control channel resources for each terminal according to the adjusted CCE aggregation level corresponding to each terminal and the determined allocation starting position of each terminal in the specific subband.

Based on the same inventive concept, an apparatus for configuring control channel resources is further provided in the embodiments of the present invention, and since the method corresponding to the apparatus for configuring control channel resources in fig. 8 is the method for configuring control channel resources in the embodiments of the present invention, the implementation of the apparatus in the embodiments of the present invention may refer to the implementation of the system, and repeated details are not described again.

As shown in fig. 8, an apparatus for configuring control channel resources according to an eighth embodiment of the present invention includes:

a first determining module 800, configured to determine, for a terminal that needs to be scheduled in a current transmission time interval TTI, a control channel element CCE aggregation level corresponding to the terminal according to downlink control information DCI of the terminal;

a second determining module 801, configured to determine, according to a preset correspondence between a channel quality indicator CQI and a coding rate, a coding rate corresponding to a CQI of a specific sub-band of the terminal, where the specific sub-band is a sub-band selected from all sub-bands corresponding to all sub-band CQIs reported by the terminal;

an adjusting module 802, configured to adjust a CCE aggregation level corresponding to the terminal according to the determined coding rate of the terminal;

a configuring module 803, configured to, after adjusting the CCE aggregation level corresponding to each terminal that needs to be scheduled in the current TTI, configure a control channel resource for each terminal according to the adjusted CCE aggregation level corresponding to each terminal.

Preferably, the second determining module 801 is further configured to:

Preferably, the adjusting module 802 is specifically configured to:

Preferably, the configuration module 803 is specifically configured to:

Preferably, the configuration module 803 is further configured to:

Preferably, the configuration module 803 is specifically configured to:

Preferably, the configuration module 803 is further configured to:

the configuration module is specifically configured to:

Preferably, the configuration module 803 is further configured to:

In summary, in the embodiment of the present invention, after determining the CCE aggregation level corresponding to the terminal according to the DCI of the terminal, the coding rate corresponding to the terminal is determined according to the CQI of the specific subband reported by the terminal, and the CCE aggregation level is adjusted according to the determined coding rate, where the CQI of the specific subband really reflects a relationship between the base station and the channel quality indication of each subband, so that the adjusted CCE aggregation level is more accurate.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, 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, 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.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (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 apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, 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 apparatus 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 apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus 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 in those 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 invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A method for configuring control channel resources, the method comprising:

after adjusting the CCE polymerization degree corresponding to each terminal needing to be scheduled in the current TTI, configuring control channel resources for each terminal according to the adjusted CCE polymerization degree corresponding to each terminal;

the method for determining the specific sub-band of the terminal comprises the following steps:

2. The method of claim 1, wherein adjusting the CCE aggregation level corresponding to the terminal according to the determined coding rate of the terminal comprises:

3. The method of claim 1, wherein configuring a control channel resource for each terminal according to the adjusted CCE aggregation level corresponding to each terminal comprises:

4. The method of claim 3, wherein after adjusting the CCE aggregation level corresponding to each terminal that needs to be scheduled in the current TTI, and before configuring the control channel resource for each terminal according to the adjusted CCE aggregation level corresponding to each terminal, the method further comprises:

5. The method of claim 3, wherein the uplink CCE total number and the downlink CCE total number are determined according to:

6. The method of claim 5, wherein the initial CCE total is determined according to:

7. The method of claim 5, wherein determining the second number of PDCCH symbols according to the number of currently activated terminals, the number of specifically activated terminals, and the determined first number of PDCCH symbols comprises:

8. The method of claim 7, wherein determining whether the determined first PDCCH symbol number needs to be adjusted according to the number of currently activated terminals and the number of specifically activated terminals comprises:

9. The method of claim 8, wherein adjusting the determined first PDCCH symbol number comprises:

10. The method according to any one of claims 1 to 9, wherein before configuring the control channel resource for each terminal according to the adjusted CCE aggregation level corresponding to each terminal, the method further includes:

11. The method according to any of claims 5 to 9, wherein the busy hour uplink and downlink PDCCH CCE usage ratio is determined according to the following manner:

12. An apparatus for configuring control channel resources, the apparatus comprising:

the configuration module is used for configuring control channel resources for each terminal according to the adjusted CCE polymerization degree corresponding to each terminal after the CCE polymerization degree corresponding to each terminal which needs to be scheduled in the current TTI is adjusted;

wherein the second determining module is further configured to:

13. The device of claim 12, wherein the adjustment module is specifically configured to:

14. The device of claim 12, wherein the configuration module is specifically configured to:

15. The device of claim 14, wherein the configuration module is further to:

16. The device of claim 14, wherein the configuration module is further to:

determining a first PDCCH symbol quantity corresponding to a CCE quantity range to which the initial CCE total number belongs according to the corresponding relation between the CCE quantity range and the PDCCH symbol quantity of the physical downlink control channel; determining the number of second PDCCH symbols according to the number of currently activated terminals, the number of specifically activated terminals and the determined number of first PDCCH symbols, wherein the number of specifically activated terminals is determined according to the activation ratio of the number of busy hour access users in a service model and the number of currently accessed terminals; determining the number of CCEs corresponding to the second PDCCH symbol number according to the corresponding relation between the CCE number range and the PDCCH symbol number and the resource unit RE occupied by other control planes; and determining the total number of the uplink CCEs and the total number of the downlink CCEs according to the determined number of the CCEs and the usage ratio of the uplink PDCCHCCEs and the downlink PDCCHCCEs in the business model during busy time.

17. The device of claim 16, wherein the configuration module is further to:

determining the number of the specifically activated terminals according to the number activation ratio of busy hour access users and the number of the currently accessed terminals in the service model; determining the number of activated terminals under different CCE polymerization degrees according to the user number ratio under different CCE polymerization degrees and the number of the specifically activated terminals; and determining the total number of the initial CCE according to the number of the activated terminals under different CCE polymerization degrees.

18. The device of claim 16, wherein the configuration module is specifically configured to:

19. The device of claim 18, wherein the configuration module is specifically configured to:

20. The device of claim 19, wherein the configuration module is specifically configured to:

21. The apparatus of any of claims 12 to 20, wherein the configuration module is further configured to:

the configuration module is specifically configured to:

22. The apparatus of any of claims 16 to 20, wherein the configuration module is further configured to: