CN116546631A

CN116546631A - Control channel time-frequency resource allocation method, equipment and storage medium

Info

Publication number: CN116546631A
Application number: CN202310822740.2A
Authority: CN
Inventors: 吴泽楠; 李晓亮; 郝鹏; 刘大可
Original assignee: Polar Core Communication Technology Xi'an Co ltd; Jixin Communication Technology Nanjing Co ltd
Current assignee: Polar Core Communication Technology Xi'an Co ltd; Jixin Communication Technology Nanjing Co ltd
Priority date: 2023-07-06
Filing date: 2023-07-06
Publication date: 2023-08-04
Anticipated expiration: 2043-07-06
Also published as: CN116546631B

Abstract

The application provides a control channel time-frequency resource allocation method, equipment and a storage medium, and relates to the technical field of communication, wherein the method is applied to network equipment and comprises the following steps: acquiring the number of control channel units allocated by the network equipment, the number of control channel units failed to be allocated and the number of terminals in an activated state in a multi-time new transmission scheduling process; determining the probability of failure of the allocation of the control channel units according to the number of the allocated control channel units and the number of the control channel units failed in the allocation; and determining time-frequency resources for transmitting the control channel and time-frequency resources for transmitting the data channel from the time-frequency resources of the control channel according to the probability and the number of the terminals in the active state. According to the scheme, the time-frequency resource for transmitting the data channel is increased, so that the transmission rate of transmitting downlink data through the data channel can be improved.

Description

Control channel time-frequency resource allocation method, equipment and storage medium

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a storage medium for allocating control channel time-frequency resources.

Background

In a fifth generation mobile communication technology (5th Generation Mobile Communication Technology,5G) wireless communication system, a network device and a terminal can perform downlink data transmission. In the downlink data transmission process, the transmission rate of the system can be adjusted and optimized by measuring the communication channel of the system.

The transmission rate of the system is related to time-frequency resources, modulation and coding strategies (Modulation and Coding Scheme, MCS), rank Indicator (RI), and other factors. Wherein, the selection of MCS and RI depends on the current channel quality, and the network equipment side can flexibly decide according to the current channel quality. In terms of time-frequency resources, for a data channel, the data channel occupies the entire frequency-domain resource in the frequency domain, and in the time domain, the network device defaults to reserve the resources of two orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) symbols for the control channel for access and resource allocation of the terminal.

When the number of terminals scheduled by the network equipment is small, the time-frequency resource allocation mode has larger redundancy, and the downlink data transmission rate is limited. Accordingly, there is a need to provide a method for improving the downlink data transmission rate with a small number of terminals scheduled by a network device.

Disclosure of Invention

The application provides a control channel time-frequency resource allocation method, equipment and a storage medium, which are used for improving the downlink data transmission rate under the condition that the number of terminals scheduled by network equipment is small.

In a first aspect, the present application provides a method for allocating control channel time-frequency resources, applied to a network device, where the method includes:

acquiring the number of control channel units allocated by the network equipment, the number of control channel units failed to be allocated and the number of terminals in an activated state in a multi-time new transmission scheduling process;

determining the probability of failure of the allocation of the control channel units according to the number of the allocated control channel units and the number of the control channel units failed in the allocation;

and determining time-frequency resources for transmitting the control channel and time-frequency resources for transmitting the data channel from the time-frequency resources of the control channel according to the probability and the number of the terminals in the active state.

In a possible implementation manner, the determining, according to the probability and the number of the active terminals, time-frequency resources for transmitting a control channel and time-frequency resources for transmitting a data channel from control channel time-frequency resources includes:

According to the probability and the number of the terminals in the active state, carrying out rate matching on the control channel time-frequency resources to obtain a rate matching mode of the control channel time-frequency resources, wherein the rate matching mode is used for indicating that the control channel time-frequency resources are configured to be in static rate matching and/or dynamic rate matching;

and determining time-frequency resources used for transmitting the control channel and time-frequency resources used for transmitting the data channel from the time-frequency resources of the control channel according to the rate matching mode.

In a possible implementation manner, the performing rate matching on the control channel time-frequency resource according to the probability and the number of the terminals in the active state to obtain a rate matching mode of the control channel time-frequency resource includes:

determining that the rate matching mode is a first mode when the probability is smaller than or equal to a first probability threshold value and the number of the terminals in an activated state is smaller than or equal to a first number threshold value;

determining that the rate matching mode is a second mode when the probability is smaller than or equal to the first probability threshold value and the number of the terminals in an activated state is larger than the first number threshold value and smaller than or equal to a second number threshold value, wherein the second number threshold value is larger than the first number threshold value;

Determining that the rate matching mode is the second mode when the probability is greater than the first probability threshold and less than or equal to a second probability threshold and the number of the terminals in an activated state is less than or equal to the second number threshold, wherein the second probability threshold is greater than the first probability threshold;

the control channel time-frequency resources comprise first time-frequency resources of a first proprietary control resource set, second time-frequency resources of a second proprietary control resource set and third time-frequency resources of a public control resource set;

the first mode is that the third time-frequency resource is configured to be the dynamic rate matching, and the first time-frequency resource is configured to be the static rate matching;

the second mode is that the first time-frequency resource, the second time-frequency resource and the third time-frequency resource are all configured to be the static rate matching.

In one possible implementation, the rate matching mode is the first mode; the determining, according to the rate matching mode, time-frequency resources for transmitting the control channel and time-frequency resources for transmitting the data channel from the control channel time-frequency resources includes:

Determining the first time-frequency resource as a time-frequency resource for transmitting the control channel, determining the second time-frequency resource as a time-frequency resource for transmitting the data channel, and determining the third time-frequency resource as a time-frequency resource for transmitting the control channel or a time-frequency resource for transmitting the data channel according to a downlink control information indication under the condition that the terminal in an activated state supports the static rate matching and the dynamic rate matching;

and under the condition that the terminal in the activated state supports static rate matching and does not support dynamic rate matching, determining time-frequency resources for transmitting the control channel and time-frequency resources for transmitting the data channel according to whether the common control resource set comprises control channel scheduling.

In a possible implementation manner, the determining, according to whether the common control resource set includes control channel scheduling, time-frequency resources for transmitting the control channel and time-frequency resources for transmitting the data channel includes:

in the case that the common control resource set does not include control channel scheduling, determining the first time-frequency resource as a time-frequency resource for transmitting the control channel, and determining the second time-frequency resource and the third time-frequency resource as time-frequency resources for transmitting the data channel; or alternatively, the process may be performed,

And in the case that the common control resource set includes control channel scheduling, determining the first time-frequency resource, the second time-frequency resource and the third time-frequency resource as time-frequency resources for transmitting the control channel.

In a possible implementation manner, the rate matching mode is the second mode, and the control channel time-frequency resource further includes a fourth time-frequency resource; the determining, according to the rate matching mode, time-frequency resources for transmitting the control channel and time-frequency resources for transmitting the data channel from the control channel time-frequency resources includes:

under the condition that the terminal in an activated state supports the static rate matching, determining a first sub-frequency resource, a second sub-frequency resource and a third sub-frequency resource for transmitting the control channel in the first time-frequency resource, the second time-frequency resource and the third time-frequency resource respectively; the first time-frequency resource and the first time-frequency resource have the same frequency domain scope, and the time domain scope of the first time-frequency resource is smaller than or equal to the time domain scope of the first time-frequency resource; the frequency domain range of the second time-frequency resource is the same as that of the second time-frequency resource, and the time domain range of the second time-frequency resource is smaller than or equal to that of the second time-frequency resource; the frequency domain range of the third time-frequency resource is the same as that of the third time-frequency resource, and the time domain range of the third time-frequency resource is smaller than or equal to that of the third time-frequency resource;

Determining the first sub-frequency resource, the second sub-frequency resource and the third sub-frequency resource as time-frequency resources for transmitting the control channel;

and determining the time-frequency resources except the first time-frequency resources, the time-frequency resources except the second time-frequency resources, the time-frequency resources except the third time-frequency resources, and the fourth time-frequency resources in the first time-frequency resources, the time-frequency resources except the third time-frequency resources in the second time-frequency resources, as the time-frequency resources used for transmitting the data channel.

In one possible embodiment, the method further comprises:

sending a capability reporting instruction to the terminal in an activated state;

and receiving capability information reported by the terminal in the activated state, wherein the capability information is used for indicating whether the terminal in the activated state supports the static rate matching and the dynamic rate matching.

In one possible implementation manner, the determining the probability of failure of allocation of control channel units according to the number of allocated control channel units and the number of control channel units failed in allocation includes:

determining a product of a number of time slots of a scheduling control channel and a number of said allocated control channel elements;

And determining the ratio of the number of the control channel units which fail to be allocated to the product as the probability of the control channel unit which fails to be allocated to the product.

In a second aspect, the present application provides a control channel time-frequency resource allocation apparatus, applied to a network device, where the apparatus includes:

the acquisition module is used for acquiring the number of the control channel units allocated by the network equipment, the number of the control channel units failed to be allocated and the number of the terminals in an activated state in the process of scheduling multiple new transmissions;

a first processing module, configured to determine a probability of failure in allocation of control channel units according to the number of allocated control channel units and the number of control channel units failed in allocation;

and the second processing module is used for determining time-frequency resources used for sending the control channel and time-frequency resources used for sending the data channel from the time-frequency resources of the control channel according to the probability and the number of the terminals in the activated state.

In a possible implementation manner, the second processing module is specifically configured to:

In one possible implementation, the rate matching mode is the first mode; the second processing module is specifically configured to:

In a possible implementation manner, the rate matching mode is the second mode, and the control channel time-frequency resource further includes a fourth time-frequency resource; the second processing module is specifically configured to:

In a possible embodiment, the second processing module is further configured to:

In one possible implementation manner, the first processing module is specifically configured to:

In a third aspect, the present application provides an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the control channel time-frequency resource allocation method according to any one of the first aspects when executing the program.

In a fourth aspect, the present application provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the control channel time-frequency resource allocation method according to any of the first aspects.

In a fifth aspect, the present application provides a computer program product comprising a computer program which, when executed by a processor, implements the control channel time-frequency resource allocation method according to any of the first aspects.

The method, the device and the storage medium for distributing the time-frequency resources of the control channel comprise the steps of firstly obtaining the number of distributed control channel units, the number of control channel units which are distributed by the network device and the number of terminals which are in an activated state in the process of scheduling for multiple new transmissions, then determining the probability of the distribution failure of the control channel units according to the number of the distributed control channel units and the number of the control channel units which are distributed failure, and determining the time-frequency resources used for transmitting the control channel and the time-frequency resources used for transmitting the data channel from the time-frequency resources of the control channel according to the probability of the distribution failure of the control channel units and the number of the terminals which are in the activated state. According to the scheme, aiming at the control channel time-frequency resource, when the time-frequency resource required by the control channel is smaller, one part of the control channel time-frequency resource is allocated to transmit the control channel, and the other part of the control channel time-frequency resource is used for transmitting the data channel, so that the time-frequency resource used for transmitting the data channel comprises the time-frequency resource originally allocated to the data channel and the time-frequency resource used for transmitting the data channel and determined from the control channel time-frequency resource, the time-frequency resource used for transmitting the data channel is increased, and the transmission rate of downlink data transmitted through the data channel can be further improved.

Drawings

For a clearer description of the present application or of the prior art, the drawings that are used in the description of the embodiments or of the prior art will be briefly described, it being apparent that the drawings in the description below are some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of time-frequency resource allocation of a data channel and a control channel;

fig. 2 is a flow chart of a control channel time-frequency resource allocation method provided in an embodiment of the present application;

fig. 3 is a schematic flow chart of determining time-frequency resources of a control channel and time-frequency resources of a data channel according to an embodiment of the present application;

fig. 4 is a schematic diagram of an adaptive judgment flow provided in an embodiment of the present application;

fig. 5 is a schematic diagram of control channel time-frequency resource allocation provided in an embodiment of the present application;

fig. 6 is a schematic structural diagram of a control channel time-frequency resource allocation device according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the present application more apparent, the technical solutions in the present application will be clearly and completely described below with reference to the drawings in the present application, and it is apparent that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

In embodiments of the present application, "at least one" means one or more, and "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: there are three cases, a alone, a and B together, and B alone, wherein a, B may be singular or plural. In the text description of the present application, the character "/" generally indicates that the front-rear association object is an or relationship.

The technical scheme provided by the application can be applied to a 5G wireless communication system, and is particularly suitable for a scene of improving the data transmission rate of a downlink peak value. In a 5G wireless communication system, network devices and terminals may perform downlink data transmission. In the downlink data transmission process, the transmission rate of the system can be adjusted and optimized by measuring the communication channel of the system.

The transmission rate of the system is related to time-frequency resources, MCS, RI, etc. Wherein, the selection of MCS and RI depends on the current channel quality, and the network equipment side can flexibly decide according to the current channel quality. In terms of time-frequency resources, a total of 14 OFDM symbols are comprised of time-domain resources and frequency-domain resources of a plurality of Resource Blocks (RBs), the number of which is configured according to a system. The RB is the smallest physical resource unit that can be scheduled by the data channel on the radio side, and is also the smallest scheduling unit of the radio communication system, and both uplink and downlink traffic channels are scheduled by taking the RB as the unit.

For the time domain resources of 14 OFDM symbols, the time domain resources of 12 OFDM symbols are allocated to the data channel, the time domain resources of 2 OFDM symbols are allocated to the control channel, and the data channel and the control channel occupy the whole frequency domain resources in the frequency domain. This process can be understood, for example, in connection with fig. 1.

Fig. 1 is a schematic diagram of time-frequency resource allocation of a data channel and a control channel, and as shown in fig. 1, description is given by taking the data channel as a physical downlink shared channel (Physical Downlink Shared Channel, PDSCH) and the control channel as a physical downlink control channel (Physical Downlink Control Channel, PDCCH).

In fig. 1, the abscissa represents time domain resources including 0-13 total 14 OFDM symbols, and the ordinate represents frequency domain resources including 106 RBs (only a part of RBs is illustrated in fig. 1). The distribution of PDCCH, PDSCH and demodulation reference signals (Demodulation Reference Signal, DMRS) in the time and frequency domains is illustrated in fig. 1.

For the PDCCH, the time-frequency resource allocated to the PDCCH is a resource of 0-1 of 2 OFDM symbols on the time domain and 106 RBs on the frequency domain; for PDSCH, the time-frequency resources allocated to PDSCH are resources of 12 OFDM symbols, 2 to 13 in the time domain, and 106 RBs in the frequency domain.

For the time-frequency resources allocated to the PDCCH, it may be referred to as control channel time-frequency resources, which in fig. 1 include a first time-frequency resource, a second time-frequency resource, a third time-frequency resource, and a fourth time-frequency resource. The third time-frequency resource is a time-frequency resource of a public control resource set, and the first time-frequency resource, the second time-frequency resource and the fourth time-frequency resource are all time-frequency resources of a special control resource set. Wherein the first time-frequency resource, the second time-frequency resource, the third time-frequency resource and the fourth time-frequency resource occupy two OFDM symbols of 0-1 in the time domain, and the RBs occupied in the frequency domain can be schematically shown in FIG. 1.

When the number of terminals scheduled by the network equipment is small, the time-frequency resource allocation mode has larger redundancy, and the downlink data transmission rate is limited. Specifically, for PDCCH, PDCCH includes a plurality of control channel elements (Control Channel Element, CCEs), and for each terminal in active state, one CCE is allocated, and 1 CCE occupies 6 RBs. In case that the number of terminals in an active state in a cell is small, the time-frequency resources allocated to the PDCCH are redundant. Taking the number of terminals in an active state in a cell as 2 as an example, 2 terminals are allocated 2 CCEs, i.e. 12 RBs, plus 8 CCEs of a common control resource, i.e. 48 RBs, the number of RBs used by these 2 terminals and the common control resource in the cell is 60. In fig. 1, the PDCCH occupies time-frequency resources on the entire frequency domain under 2 OFDM symbols, and includes 106×2=212 RBs in total, which is far greater than 60 RBs already used, resulting in waste.

Based on the above technical problems, the embodiments of the present application provide a control channel time-frequency resource allocation method, which reduces the waste of time-frequency resources and improves the downlink data transmission rate by giving appropriate time-frequency resources to PDSCH for data transmission in the case that there is redundancy in the time-frequency resources of PDCCH. The following describes embodiments of the present application with reference to the drawings.

Fig. 2 is a flow chart of a control channel time-frequency resource allocation method provided in an embodiment of the present application, as shown in fig. 2, where the method includes:

s21, the number of CCEs allocated by the network equipment in the process of multi-time new transmission scheduling, the number of CCEs which are failed to be allocated and the number of terminals in an activated state are obtained.

The scheduling process refers to a process that the network device selects a process to run from the ready queue according to a scheduling policy. The transmission control protocol (Transmission Control Protocol, TCP) specifies that after the retransmitted "time slice" has arrived, if the Acknowledgement (ACK) of the other party has not been received, the packet is retransmitted to avoid being involved in endless waiting in order to ensure reliable data transmission. The new transmission is referred to as a new transmission when data interaction with the terminal occurs, as opposed to a retransmission. In a communication system, an underlying order is transmitted mainly through a control channel, and CCE is a basic constituent unit of PDCCH.

In one possible implementation, the number of CCEs allocated, the number of CCEs failing to allocate, and the number of terminals in an active state may be recorded by a counter. Specifically, the number of CCEs allocated, the number of CCEs failed to allocate, and the number of terminals in an active state are acquired by maintaining three counters, wherein the first counter is used for recording the number of CCEs allocated, the second counter is used for recording the number of CCEs failed to allocate, and the third counter is used for recording the number of terminals in an active state. The three counters are initially set to 0.

In the process of scheduling a plurality of new transmissions, the network equipment adds 1 to the number of the first counters and adds 1 to the second counter when one CCE with failure allocation occurs, adds 1 to the third counter when one terminal in an active state is added, and subtracts 1 from the third counter when one terminal in an active state is subtracted. The number of CCEs allocated, the number of CCEs failed to allocate, and the number of terminals in an active state are counted by the above method. The number of times of the new transmission scheduling is greater than or equal to N, wherein N is a preset value, and N is a positive integer.

S22, determining the probability of failure of CCE allocation according to the number of the allocated CCEs and the number of the CCEs with failure allocation.

After the number of allocated CCEs and the number of CCEs failing to allocate are obtained, the probability of CCE allocation failure, that is, the ratio of the number of CCEs failing to allocate to the number of allocated CCEs, may be obtained based on the number of allocated CCEs and the number of CCEs failing to allocate.

Specifically, the product of the number of slots of the scheduling control channel and the number of allocated CCEs is first determined. If the number of slots of the scheduling control channel is a and the number of allocated CCEs is determined to be B by the first counter, the product of the number of slots of the scheduling control channel and the number of allocated CCEs is a×b.

Then, the ratio of the number of CCEs failing to allocate to the product is determined as the probability of CCE allocation failure. Let the number of CCEs for which allocation fails be determined by the second counter be C, and D be defined as the probability of CCE allocation failure, there are:

（1）

for example, when the number of slots of the scheduling control channel is determined to be 500 times, the number of CCEs allocated per slot is 16, the number of CCEs failed to allocate is 720, a=500, b=16, c=720, and the probability of CCE allocation failure is determined 。

S23, determining time-frequency resources for transmitting the control channel and time-frequency resources for transmitting the data channel from the time-frequency resources of the control channel according to the probability of failure of CCE allocation and the number of terminals in an activated state.

In the embodiment of the present application, the control channel time-frequency resource is a time-frequency resource that occupies 2 OFDM symbols in the time domain and occupies the entire frequency domain resource in the frequency domain, and in the control channel time-frequency resource, a part of the time-frequency resource is determined to be used for transmitting the control channel, and another part of the time-frequency resource is used for transmitting the data channel, that is, a part of the time-frequency resource originally allocated to the control channel is reserved for the data channel.

This process is described below in connection with fig. 3.

Fig. 3 is a schematic flow chart of determining time-frequency resources of a control channel and time-frequency resources of a data channel according to an embodiment of the present application, where, as shown in fig. 3, the method includes:

s31, according to the probability of CCE allocation failure and the number of terminals in an activated state, performing rate matching on the control channel time-frequency resources to obtain a rate matching mode of the control channel time-frequency resources, wherein the rate matching mode is used for indicating that the control channel time-frequency resources are configured to be in static rate matching and/or dynamic rate matching.

In this embodiment of the present application, static rate matching refers to fixedly reserving corresponding time-frequency resources for a control channel to be used for transmitting the control channel, and dynamic rate matching refers to selectively reserving corresponding time-frequency resources for a control channel or a data channel to be used for transmitting the control channel or the data channel according to requirements.

The control channel time-frequency resources include a first time-frequency resource of a first set of exclusive control resources, a second time-frequency resource of a second set of exclusive control resources, and a third time-frequency resource of a common set of control resources. According to the probability of failure of CCE allocation and the number of terminals in an active state, the rate matching mode of the control channel time-frequency resource can be determined to be a first mode or a second mode. The first mode is that the third time-frequency resource is configured to be dynamic rate matching, and the first time-frequency resource is configured to be static rate matching; the second mode is that the first time-frequency resource, the second time-frequency resource and the third time-frequency resource are all configured to be static rate matching. This process is described below in connection with fig. 4.

Fig. 4 is a schematic diagram of an adaptive judgment flow provided in an embodiment of the present application, as shown in fig. 4, including:

s41, judging whether the terminal supports static rate matching, if so, executing S42, and if not, ending the flow.

In the terminal access stage, the network equipment sends a capability reporting instruction to the terminal in an activated state. And after receiving the capability reporting instruction sent by the network equipment, the terminal in the activated state sends capability information to the network equipment. The network equipment receives the capability information reported by the terminal in the active state, wherein the capability information is used for indicating whether the terminal in the active state supports static rate matching and dynamic rate matching. Based on the capability information, the network device determines whether the terminal supports static rate matching and dynamic rate matching. If the terminal does not support static rate matching, the flow is ended, and if the terminal supports static rate matching, S42 is executed.

S42, determining a first probability threshold value, a second probability threshold value, a first quantity threshold value and a second quantity threshold value.

The first probability threshold value and the second probability threshold value are two threshold values corresponding to the probability of failure of CCE allocation, and the first probability threshold value is smaller than the second probability threshold value; the first quantity threshold value and the second quantity threshold value are two threshold values corresponding to the quantity of the terminals in the activated state, and the first quantity threshold value is smaller than the second quantity threshold value.

S43, judging whether the probability of CCE allocation failure is smaller than or equal to a first probability threshold value, if so, executing S44, and if not, executing S47.

S44, judging whether the number of the terminals in the activated state is smaller than or equal to a first number threshold value, if yes, executing S45, and if not, executing S46.

S45, determining the rate matching mode as a first mode.

And determining the rate matching mode as a first mode under the condition that the probability of CCE allocation failure is smaller than or equal to a first probability threshold value and the number of terminals in an activated state is smaller than or equal to a first number threshold value. The first mode is that the third time-frequency resource is configured for dynamic rate matching, and the first time-frequency resource is configured for static rate matching.

S46, judging whether the number of the terminals in the activated state is larger than a first number threshold value and smaller than or equal to a second number threshold value, if so, executing S49, and if not, ending the flow.

And determining that the rate matching mode is a second mode under the condition that the probability of CCE allocation failure is smaller than or equal to a first probability threshold value and the number of terminals in an activated state is larger than the first number threshold value and smaller than or equal to a second number threshold value, wherein the second number threshold value is larger than the first number threshold value.

S47, judging whether the probability of CCE allocation failure is larger than a first probability threshold value and smaller than or equal to a second probability threshold value, if so, executing S48, and if not, ending the flow.

S48, judging whether the number of the terminals in the activated state is smaller than or equal to a second number threshold value, if yes, executing S49, and if not, ending the flow.

And determining that the rate matching mode is a second mode under the condition that the probability of CCE allocation failure is larger than a first probability threshold value and smaller than or equal to a second probability threshold value and the number of terminals in an activated state is smaller than or equal to a second number threshold value, wherein the second probability threshold value is larger than the first probability threshold value.

S49, determining the rate matching mode as a second mode.

The second mode is that the first time-frequency resource, the second time-frequency resource and the third time-frequency resource are all configured to be static rate matching.

The above described adaptation procedure is described below in a few specific examples.

The rate matching scheme of the first mode and the rate matching scheme of the second mode are first configured. Then, rate matching supported by the terminal is judged.

The first counter, the second counter and the third counter are maintained and are used for counting the number of the allocated CCEs, the number of the CCEs which are failed to be allocated and the number of the terminals which are in an activated state respectively, and calculating the probability of failure of the CCE allocation.

For example, when the system bandwidth is 20MHz and 106RB, the first probability threshold is 10%, the second probability threshold is 20%, the first number threshold is 2, and the second number threshold is 6. The PDCCH available time-frequency resource includes 2 OFDM symbols in the time domain, for a total of 212 RBs, when the frequency domain resource of the second time-frequency resource is configured as 8 CCEs (48 RBs).

When the number of slots of the scheduled control channel is 500 times, the number of control channel units allocated per slot is 8, and the number of control channel units failed to be allocated is 320, a=500, b=16, c=720, and the probability d=8% of control channel unit allocation failure is determined. The probability of failure of allocation of the control channel element is less than the first probability threshold.

When the number of the terminals currently in the active state is determined to be 4, the number of the terminals currently in the active state is greater than the first number threshold value and less than the second number threshold value. And through self-adaptive judgment, the rate matching mode of the system in the embodiment is a second mode.

For example, when the system bandwidth is 20MHz and 106RB, the first probability threshold is 10%, the second probability threshold is 20%, the first number threshold is 2, and the second number threshold is 6. The PDCCH available time-frequency resource includes 2 OFDM symbols for 212RB in total, and the frequency domain resource of the second time-frequency resource is configured as 8CCE (48 RB).

When the number of slots of the scheduled control channel is determined to be 500 times, the number of control channel units allocated per slot is 2, the number of control channel units failed to be allocated is 10, a=500, b=2, c=1, and the probability d=1% of control channel unit allocation failure. The probability of failure of allocation of the control channel element is less than the first probability threshold.

When the number of the terminals currently in the activated state is determined to be 1, the number of the terminals currently in the activated state is smaller than a first number threshold value. And through self-adaptive judgment, the rate matching mode of the system in the embodiment is a first mode.

S32, according to the rate matching mode, determining time-frequency resources used for transmitting the control channel and time-frequency resources used for transmitting the data channel from the time-frequency resources of the control channel.

In the above embodiment, an implementation of determining a rate matching mode is described in connection with fig. 4. After determining that the rate matching mode is the first mode or the second mode, time-frequency resources for transmitting the control channel and time-frequency resources for transmitting the data channel may be determined according to the rate matching mode.

First, an implementation when the rate matching mode is the first mode will be described.

Although the first mode is that the third time-frequency resource is configured to be dynamic rate matching, and the first time-frequency resource is configured to be static rate matching, the terminal in an active state may support both static rate matching and dynamic rate matching, and may only support static rate matching, so that the mode of actually distributing the time-frequency resource is different for different capabilities of the terminal.

The first case is that in the case that the terminal in the active state supports both static rate matching and dynamic rate matching, the first time-frequency resource is determined as a time-frequency resource for transmitting a control channel, the second time-frequency resource is determined as a time-frequency resource for transmitting a data channel, and the third time-frequency resource is determined as a time-frequency resource for transmitting a control channel or a time-frequency resource for transmitting a data channel according to an indication of downlink control information (Downlink Control Information, DCI).

That is, the second time-frequency resource is transmitted to the downlink shared channel PDSCH, and the initial symbol of the PDSCH starts from the symbol where the terminal-specific search space (UE-specific Search Space, USS) is located.

Fig. 5 is a schematic diagram of time-frequency resource allocation of a control channel according to an embodiment of the present application, and as shown in fig. 5, description is given by taking a data channel as PDSCH and a control channel as PDCCH as an example.

In fig. 1, the abscissa represents time domain resources including 0-13 total 14 OFDM symbols, and the ordinate represents frequency domain resources including 106 RBs (only a part of RBs is illustrated in fig. 5).

For the PDCCH, the time-frequency resource of the control channel allocated to the PDCCH is a resource of 0-1 of 2 OFDM symbols in the time domain and 106 RBs in the frequency domain; for PDSCH, the data channel time-frequency resources allocated to PDSCH are resources of 12 OFDM symbols, 2 to 13 in the time domain, and 106 RBs in the frequency domain.

In fig. 5, the control channel time-frequency resources include a first time-frequency resource of a first exclusive control resource set, a second time-frequency resource of a second exclusive control resource set, and a third time-frequency resource of a common control resource set, and may further include a fourth time-frequency resource. Wherein the first time-frequency resource, the second time-frequency resource, the third time-frequency resource and the fourth time-frequency resource occupy two OFDM symbols of 0-1 in the time domain, and the RBs occupied in the frequency domain can be illustrated in fig. 5.

In one implementation, the first time-frequency resource is determined as a time-frequency resource for transmitting the PDCCH, the second time-frequency resource is determined as a time-frequency resource for transmitting the PDSCH, and the third time-frequency resource is determined as a time-frequency resource for transmitting the PDCCH or a time-frequency resource for transmitting the PDSCH according to an indication of the DCI. It can be seen that after the scheme of the embodiment of the application is used, part of the time-frequency resources originally allocated to the PDCCH is given out to the PDSCH, so that the time-frequency resources of the PDSCH can be widened, and the data transmission rate is improved.

In the second case, in the case where the terminal in the active state supports static rate matching and does not support dynamic rate matching, it is first determined whether control channel scheduling, such as PDCCH scheduling, is included in the common control resource set. And determining time-frequency resources for transmitting the control channel and time-frequency resources for transmitting the data channel according to whether the common control resource set comprises control channel scheduling or not.

When there is no control channel scheduling in the common control resource set, in one possible implementation, the first time-frequency resource may be determined as a time-frequency resource for transmitting a control channel, and the second time-frequency resource and the third time-frequency resource may be determined as time-frequency resources for transmitting a data channel. The time domain resource at the beginning of the symbol of the special search space associated with the first time-frequency resource is determined as the time domain resource initial symbol used for transmitting the data channel, and the frequency domain resource except the first time-frequency resource used for transmitting the control channel is determined as the frequency domain resource used for transmitting the data channel. In the implementation manner, the second time-frequency resource and the third time-frequency resource are given out to the data channel as the time-frequency resource for transmitting the data channel in the control channel time-frequency resource originally used for transmitting the control channel, and the first time-frequency resource is still used for transmitting the control channel, so that the time-frequency resource of the PDSCH can be widened, and the data transmission rate can be improved.

When the common set of control resources includes control channel scheduling, in one possible implementation, the first time-frequency resource, the second time-frequency resource, and the third time-frequency resource may be determined as time-frequency resources for transmitting the control channel.

When the common control resource sets control channel scheduling, the control channel time-frequency resources are all used for transmitting the control channel, the time-frequency resources are not reserved for the data channel, and the rate matching mode does not adopt the first mode.

An implementation when the rate matching mode is the second mode is described below.

When the rate matching mode is a second mode, under the condition that the terminal in an activated state supports static rate matching, determining a first sub-frequency resource, a second sub-frequency resource and a third sub-frequency resource for transmitting a control channel in the first time-frequency resource, the second time-frequency resource and the third time-frequency resource respectively; the first time-frequency resource and the first time-frequency resource have the same frequency domain scope, and the time domain scope of the first time-frequency resource is smaller than or equal to the time domain scope of the first time-frequency resource; the frequency domain scope of the second time-frequency resource is the same as that of the second time-frequency resource, and the time domain scope of the second time-frequency resource is smaller than or equal to that of the second time-frequency resource; the frequency domain range of the third time-frequency resource is the same as that of the third time-frequency resource, and the time domain range of the third time-frequency resource is smaller than or equal to that of the third time-frequency resource; then, the first sub-frequency resource, the second sub-frequency resource, and the third sub-frequency resource are determined as time-frequency resources for transmitting the control channel, and the time-frequency resources other than the first sub-frequency resource, the time-frequency resources other than the second sub-frequency resource, the time-frequency resources other than the third sub-frequency resource, and the fourth time-frequency resource are determined as time-frequency resources for transmitting the data channel. Determining a time domain resource at the beginning of a symbol of a special search space associated with the time domain resource of the control channel as a starting symbol of the time domain resource for transmitting the data channel; frequency domain resources other than the frequency domain resources used for transmitting the control channel among the frequency domain resources of the control channel are determined as frequency domain resources used for transmitting the data channel.

As shown in fig. 5, the frequency domain range occupied by the first time-frequency resource in the frequency domain may be indicated by an arrow corresponding to the first time-frequency resource in fig. 5, and the time domain range occupied by the first time-frequency resource in the time domain is 0-1, which is 2 OFDM symbols. The first sub-frequency resource and the first time-frequency resource are identical in frequency domain, but the time domain range of the first sub-frequency resource is less than or equal to the time domain range of the first time-frequency resource. For example, the first time-frequency resource occupies two OFDM symbols of 0-1 in the time domain, and the first time-frequency resource occupies only one OFDM symbol of symbol 1 in the time domain, or the first time-frequency resource occupies two OFDM symbols of 0-1 in the time domain.

The frequency domain range occupied by the second time-frequency resource in the frequency domain can be shown by an arrow corresponding to the second time-frequency resource in fig. 5, and the time domain range occupied by the second time-frequency resource in the time domain is 0-1 of 2 OFDM symbols. The second sub-frequency resource and the second time-frequency resource are identical in frequency domain, but the time domain range of the second sub-frequency resource is less than or equal to the time domain range of the second time-frequency resource. For example, the second time-frequency resource occupies two OFDM symbols of 0-1 in the time domain, while the second time-frequency resource occupies only one OFDM symbol of symbol 1 in the time domain, or the second time-frequency resource occupies two OFDM symbols of 0-1 in the time domain.

The frequency domain range occupied by the third time-frequency resource in the frequency domain can be shown by an arrow corresponding to the third time-frequency resource in fig. 5, and the time domain range occupied by the third time-frequency resource in the time domain is 0-1 of 2 OFDM symbols. The third sub-frequency resource and the third time-frequency resource are identical in frequency domain, but the time domain range of the third sub-frequency resource is less than or equal to the time domain range of the third time-frequency resource. For example, the third time-frequency resource occupies two OFDM symbols of 0-1 in the time domain, while the third time-frequency resource occupies only one OFDM symbol of symbol 1 in the time domain, or the third time-frequency resource occupies two OFDM symbols of 0-1 in the time domain.

In the case that the terminal in the active state does not support static rate matching, the rate matching mode does not adopt the first mode and the second mode.

In summary, in the control channel time-frequency resource allocation method provided in the embodiment of the present application, the number of control channel units allocated by the network device, the number of control channel units failing to allocate, and the number of terminals in an active state in the multiple new transmission scheduling process are first obtained, then the probability of failure in allocation of the control channel units is determined according to the number of allocated control channel units and the number of control channel units failing to allocate, and the time-frequency resource for transmitting the control channel and the time-frequency resource for transmitting the data channel are determined from the control channel time-frequency resource according to the probability of failure in allocation of the control channel units and the number of terminals in an active state. According to the scheme, aiming at the control channel time-frequency resource, when the time-frequency resource required by the control channel is smaller, one part of the control channel time-frequency resource is allocated to transmit the control channel, and the other part of the control channel time-frequency resource is used for transmitting the data channel, so that the time-frequency resource used for transmitting the data channel comprises the time-frequency resource originally allocated to the data channel and the time-frequency resource used for transmitting the data channel and determined from the control channel time-frequency resource, the time-frequency resource used for transmitting the data channel is increased, and the transmission rate of downlink data transmitted through the data channel can be further improved.

The control channel time-frequency resource allocation device provided by the application is described below, and the control channel time-frequency resource allocation device described below and the control channel time-frequency resource allocation method described above can be referred to correspondingly.

Fig. 6 is a schematic structural diagram of a control channel time-frequency resource allocation device according to an embodiment of the present application, as shown in fig. 6, where the device includes:

an obtaining module 61, configured to obtain the number of control channel units allocated to the network device, the number of control channel units failed to be allocated, and the number of terminals in an active state in a multiple new transmission scheduling process;

a first processing module 62, configured to determine a probability of failure in allocation of control channel units according to the number of allocated control channel units and the number of control channel units failed in allocation;

a second processing module 63, configured to determine, according to the probability and the number of active terminals, a time-frequency resource for transmitting a control channel and a time-frequency resource for transmitting a data channel from control channel time-frequency resources.

In one possible implementation, the second processing module 63 is specifically configured to:

In one possible implementation, the rate matching mode is the first mode; the second processing module 63 is specifically configured to:

In a possible implementation manner, the rate matching mode is the second mode, and the control channel time-frequency resource further includes a fourth time-frequency resource; the second processing module 63 is specifically configured to:

In a possible implementation manner, the second processing module 63 is further configured to:

In one possible implementation, the first processing module 62 is specifically configured to:

The control channel time-frequency resource allocation device provided in the embodiment of the present application is configured to execute the above method embodiment, and its implementation principle and technical effects are similar, and this embodiment is not repeated here.

Fig. 7 illustrates a physical schematic diagram of an electronic device, as shown in fig. 7, which may include: processor 710, communication interface (Communications Interface) 720, memory 730, and communication bus 740, wherein processor 710, communication interface 720, memory 730 communicate with each other via communication bus 740. Processor 710 may invoke logic instructions in memory 730 to perform a control channel time-frequency resource allocation method comprising: acquiring the number of control channel units allocated by the network equipment, the number of control channel units failed to be allocated and the number of terminals in an activated state in a multi-time new transmission scheduling process; determining the probability of failure of the allocation of the control channel units according to the number of the allocated control channel units and the number of the control channel units failed in the allocation; and determining time-frequency resources for transmitting the control channel and time-frequency resources for transmitting the data channel from the time-frequency resources of the control channel according to the probability and the number of the terminals in the active state.

Further, the logic instructions in the memory 730 described above may be implemented in the form of software functional units and may be stored in a computer readable storage medium when sold or used as a stand alone product. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

In another aspect, the present application further provides a computer program product, where the computer program product includes a computer program, where the computer program can be stored on a non-transitory computer readable storage medium, where the computer program when executed by a processor can perform the control channel time-frequency resource allocation method provided by the foregoing embodiments, and the method includes: acquiring the number of control channel units allocated by the network equipment, the number of control channel units failed to be allocated and the number of terminals in an activated state in a multi-time new transmission scheduling process; determining the probability of failure of the allocation of the control channel units according to the number of the allocated control channel units and the number of the control channel units failed in the allocation; and determining time-frequency resources for transmitting the control channel and time-frequency resources for transmitting the data channel from the time-frequency resources of the control channel according to the probability and the number of the terminals in the active state.

In yet another aspect, the present application further provides a non-transitory computer readable storage medium having stored thereon a computer program, which when executed by a processor, is implemented to perform the control channel time-frequency resource allocation method provided in the above embodiments, the method including: acquiring the number of control channel units allocated by the network equipment, the number of control channel units failed to be allocated and the number of terminals in an activated state in a multi-time new transmission scheduling process; determining the probability of failure of the allocation of the control channel units according to the number of the allocated control channel units and the number of the control channel units failed in the allocation; and determining time-frequency resources for transmitting the control channel and time-frequency resources for transmitting the data channel from the time-frequency resources of the control channel according to the probability and the number of the terminals in the active state.

The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.

From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims

1. A method for allocating control channel time-frequency resources, which is applied to a network device, the method comprising:

2. The method of claim 1, wherein the determining time-frequency resources for transmitting a control channel and time-frequency resources for transmitting a data channel from among control channel time-frequency resources according to the probability and the number of terminals in an active state comprises:

3. The method according to claim 2, wherein the performing rate matching on the control channel time-frequency resource according to the probability and the number of the active terminals to obtain a rate matching mode of the control channel time-frequency resource includes:

4. A method according to claim 3, wherein the rate matching mode is the first mode; the determining, according to the rate matching mode, time-frequency resources for transmitting the control channel and time-frequency resources for transmitting the data channel from the control channel time-frequency resources includes:

5. The method of claim 4, wherein determining time-frequency resources for transmitting the control channel and time-frequency resources for transmitting the data channel based on whether the common set of control resources includes control channel scheduling comprises:

6. The method of claim 3, wherein the rate matching mode is the second mode, and wherein the control channel time-frequency resources further comprise fourth time-frequency resources; the determining, according to the rate matching mode, time-frequency resources for transmitting the control channel and time-frequency resources for transmitting the data channel from the control channel time-frequency resources includes:

7. The method according to any one of claims 3-6, further comprising:

8. The method according to any of claims 1-6, wherein said determining a probability of a control channel element allocation failure based on the number of allocated control channel elements and the number of control channel elements that failed the allocation comprises:

9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the control channel time-frequency resource allocation method of any one of claims 1 to 8 when the program is executed by the processor.

10. A computer readable storage medium having stored thereon a computer program, which when executed by a processor implements the control channel time-frequency resource allocation method according to any of claims 1 to 8.