CN113037442B

CN113037442B - Method and device for adjusting CCE aggregation level of control channel unit

Info

Publication number: CN113037442B
Application number: CN201911351529.7A
Authority: CN
Inventors: 陈增辉
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2019-12-24
Filing date: 2019-12-24
Publication date: 2022-04-05
Anticipated expiration: 2039-12-24
Also published as: CN113037442A

Abstract

The embodiment of the invention provides a method and a device for adjusting CCE aggregation level of a control channel unit. The method is applied to network side equipment, and comprises the following steps: determining Downlink Control Information (DCI) sent to a terminal, receiving a Channel Quality Indicator (CQI) reported by the terminal, determining a first signal to interference plus noise ratio (SINR) corresponding to the CQI, and determining a second SINR corresponding to the DCI; obtaining a target SINR according to the first SINR and the second SINR; determining a target first corresponding relation according to the DCI bit number of the DCI, and determining a target CCE aggregation level corresponding to the target SINR; wherein, the first corresponding relation is the corresponding relation between the SINR and the CCE aggregation level; and adjusting the CCE aggregation level of the physical downlink control channel PDCCH of the terminal to be a target CCE aggregation level. The embodiment of the invention solves the problem that the utilization of PDCCH resources is influenced by adjusting the CCE aggregation level through the MCS level in the prior art.

Description

Method and device for adjusting CCE aggregation level of control channel unit

Technical Field

The invention relates to the technical field of mobile communication, in particular to a method and a device for adjusting CCE aggregation level of a control channel element.

Background

In a wireless communication system, a Physical Downlink Control Channel (PDCCH) carries functions such as scheduling and resource allocation information of a User Equipment (UE). In a 5G New Radio (NR) protocol, one PDCCH may be transmitted on n consecutive Control Channel Elements (CCEs), and each CCE consists of 12 Resource Element Groups (REGs).

The aggregation level indicates the number of CCEs occupied by one PDCCH, that is, the PDCCH can use the CCE aggregation level to indicate the occupied control resources. In general, the higher the CCE aggregation level of one PDCCH is, the better the demodulation performance is, but the more control resources are occupied; in multi-user test, PDCCH resource limitation is easily caused. Therefore, in the prior art, there is a scheme for adjusting CCE aggregation level, and the CCE aggregation level is mainly adjusted by a Channel Quality Indicator (CQI). Specifically, the spectral efficiency corresponding to the current CQI is compared with the spectral efficiency corresponding to the CCE aggregation level, and an aggregation level is selected so that the spectral efficiency corresponding to the selected aggregation level is higher than the spectral efficiency corresponding to the current CQI.

However, adjusting the CCE aggregation level only by the MCS level affects the utilization of PDCCH resources.

On the one hand, the correspondence between the CCE aggregation level and the spectral efficiency is controlled according to a Modulation and Coding Scheme (MCS) level preset in the base station, and the CCE aggregation level and the spectral efficiency have different correspondence under different MCSs. However, the preset MCS cannot accurately reflect the channel quality (corresponding threshold), which may cause the CCE aggregation level selection to be inconsistent with the actual channel environment, and affect the utilization of the PDCCH resource.

On the other hand, in the conventional adjustment scheme, when the channel quality variation range is large, the Medium Access Control (MAC) layer may correct the CQI, which may easily cause that the CCE aggregation level may change violently, so that the aggregation level is adjusted frequently, which may bring a huge overhead to terminal demodulation, and may not fully utilize the PDCCH resource.

Disclosure of Invention

The embodiment of the invention provides a method and a device for adjusting CCE aggregation level of a control channel unit, which aim to solve the problem that the utilization of PDCCH resources is influenced by adjusting the CCE aggregation level through MCS level in the prior art.

In one aspect, an embodiment of the present invention provides a method for adjusting CCE aggregation levels, where the method is applied to a network device, and the method includes:

determining Downlink Control Information (DCI) sent to a terminal, receiving a Channel Quality Indicator (CQI) reported by the terminal, determining a first signal to interference plus noise ratio (SINR) corresponding to the CQI, and determining a second SINR corresponding to the DCI;

obtaining a target SINR according to the first SINR and the second SINR;

determining a target first corresponding relation according to the DCI bit number of the DCI, and determining a target CCE aggregation level corresponding to the target SINR; wherein, the first corresponding relation is the corresponding relation between the SINR and the CCE aggregation level;

and adjusting the CCE aggregation level of the physical downlink control channel PDCCH of the terminal to be a target CCE aggregation level.

On the other hand, an embodiment of the present invention further provides a device for adjusting CCE aggregation levels, where the device is applied to a network device, and the device includes:

an SINR determining module, configured to determine downlink control information DCI sent to a terminal, receive a channel quality indicator CQI reported by the terminal, determine a first signal to interference plus noise ratio SINR corresponding to the CQI, and determine a second SINR corresponding to the DCI;

the SINR processing module is used for obtaining a target SINR according to the first SINR and the second SINR;

a grade determining module, configured to determine a target first corresponding relationship according to the DCI bit number of the DCI, and determine a target CCE aggregation level corresponding to the target SINR; wherein, the first corresponding relation is the corresponding relation between the SINR and the CCE aggregation level;

and the grade adjusting module is used for adjusting the CCE aggregation grade of the PDCCH of the terminal to a target CCE aggregation grade.

In yet another aspect, an embodiment of the present invention further provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor, when executing the computer program, implements the steps in the method for adjusting the CCE aggregation level as described above.

In still another aspect, an embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored, and when executed by a processor, the computer program implements the steps in the method for adjusting the CCE aggregation level as described above.

In the embodiment of the invention, a first SINR corresponding to a CQI and a second SINR corresponding to the DCI are determined by determining the DCI sent to a terminal and receiving the CQI reported by the terminal; obtaining a target SINR according to the first SINR and the second SINR; determining a target first corresponding relation according to the DCI bit number of the DCI, and determining a target CCE aggregation level corresponding to the target SINR; finally, adjusting the CCE aggregation level of the physical downlink control channel PDCCH of the terminal to be a target CCE aggregation level; the target SINR is determined through the DCI and the CQI, the channel quality is accurately reflected, and the phenomenon that when the channel quality changes, the SINR changes obviously and the CCE aggregation level is adjusted frequently is avoided. Meanwhile, the first corresponding relation between the SINR and the CCE aggregation level is determined based on the DCI bit number, so that the CCE aggregation level is adaptive to the DCI bit number, PDCCH resources are reasonably utilized, and the condition that the CCE aggregation level is selected and does not accord with the actual channel environment is avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a flowchart illustrating steps of a method for adjusting CCE aggregation levels according to an embodiment of the present invention;

FIG. 2 is a flowchart of the steps of a second example of an embodiment of the present invention;

fig. 3 is a block diagram of a structure of a device for adjusting CCE aggregation levels according to an embodiment of the present invention;

fig. 4 is a block diagram of an electronic device according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

Referring to fig. 1, an embodiment of the present invention provides a method for adjusting CCE aggregation levels, where the method is applied to a network side device, where the network side device may be a Base Station (BS), and the Base Station is a device deployed in an access network and configured to provide a wireless communication function for a terminal. The base stations may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. In systems using different radio access technologies, the names of devices that function as base stations may differ, for example, in a 5G NR system, a base station is called a nodeb or a gNB. The name "base station" may change as communication technology evolves. Further, the terminal can include various handheld devices having wireless communication capabilities, vehicle mounted devices, wearable devices, computing devices, or other processing devices connected to wireless modems, as well as various forms of mobile stations, user equipment, and the like.

The method comprises the following steps:

step 101, determining downlink control information DCI sent to a terminal, receiving a channel quality indicator CQI reported by the terminal, determining a first signal to interference plus noise ratio SINR corresponding to the CQI, and determining a second SINR corresponding to the DCI.

In this step, the network side device determines Downlink Control Information (DCI) that is sent to the terminal, where the DCI is carried by the PDCCH and includes Information such as uplink and Downlink resource allocation, HARQ Information, and power Control. Different DCI information, whose roles are different; for example, DCI allocated to a downlink Resource Block (RB), DCI allocated to an uplink RB, DCI adjusted for uplink power control, DCI for downlink dual-stream space division multiplexing, and the like. The protocols classify these DCIs and distinguish them with different DCI formats. For example, in the protocol of version R9 in Long Term Evolution (LTE) system, the following DCI are defined: DCI0, DCI1, DCI1A, DCI1B, DCI1C, DCI1D, DCI2, DCI2A, DCI2B, DCI3, DCI 3A; the DCI0, the DCI3, and the DCI3A are DCI types related to an uplink PUSCH or PUCCH, and are referred to as uplink DCI in the embodiment of the present invention; the DCI1, the DCI1A, the DCI1B, the DCI1C, the DCI1D, the DCI2, the DCI2A, and the DCI2B are DCI types for the downlink PDSCH, and are referred to as downlink DCI in the embodiment of the present invention.

As another example, in the protocol of version R15 in the 5G NR system, the following DCI formats are defined: DCI00, DCI01, DCI10, DCI11, DCI21, DCI22, and DCI 23; the DCI00 and the DCI01 are DCI types related to an uplink PUSCH or PUCCH, and are referred to as uplink DCI in the embodiment of the present invention; the DCI10 and the DCI11 are DCI types for the downlink PDSCH, and are referred to as downlink DCI in the embodiment of the present invention.

CQI is a measurement standard of communication quality of a wireless channel; in general, a higher value of CQI represents a higher communication quality of its channel. The terminal sends CQI to a network side device (e.g., a base station) on a Physical Uplink Control Channel (PUCCH) and a Physical Downlink Shared Channel (PUSCH). The network side equipment obtains the CQI value, evaluates the Channel quality according to the CQI value and schedules a Physical Downlink Shared Channel (PDSCH).

The network side equipment receives CQI reported by a terminal and determines a first SINR corresponding to the CQI; and determining a second SINR corresponding to the DCI according to the DCI issued to the terminal. Specifically, the Signal to Interference plus Noise Ratio (SINR) refers to the Ratio of the strength of the received useful Signal to the strength of the received Interference Signal (Noise and Interference); optionally, in the process of determining the SINR, the base station places the uplink SRS of each UE in the last block of one subframe. The frequency domain spacing of the SRS is two equivalent subcarriers, so the SRS of one UE interferes only with the SRS of other UEs.

Therefore, SINR is SRS received power/(interference power + noise power);

the SRS received power is SRS transmit power and link loss, and the interference power is the sum of SRS received powers of all UEs in the neighboring cell.

And 102, obtaining a target SINR according to the first SINR and the second SINR.

In the step, a target SINR is obtained according to SINRs corresponding to the DCI and the CQI respectively, and the target SINR is used as a reference of channel quality; the target SINR determined by the DCI and the CQI can reflect the channel quality more accurately relative to the MCS, and the SINR is determined by two parameters, so that the phenomenon that the SINR changes obviously and the CCE aggregation level is adjusted frequently when the channel quality changes is avoided.

103, determining a target first corresponding relation according to the DCI bit number of the DCI, and determining a target CCE aggregation level corresponding to the target SINR; wherein, the first corresponding relation is the corresponding relation between the SINR and the CCE aggregation level.

Specifically, different first corresponding relationships correspond to different DCI bit numbers, and the first corresponding relationship is a corresponding relationship between SINR and CCE aggregation level; that is to say, under the condition of different DCI bit numbers, different first corresponding relationships exist between SINR and CCE aggregation levels, so that CCE aggregation levels are adapted to the DCI bit numbers, thereby avoiding that the CCE aggregation levels are too large, and PDCCH resources are wasted, and meanwhile, avoiding that the CCE aggregation levels are too small, and DCI or other signaling information cannot be carried.

The network side equipment determines the DCI bit number according to the DCI issued to the terminal, and then determines a target first corresponding relation corresponding to the DCI bit number; and finally, searching a target CCE aggregation level corresponding to the target SINR in the target first corresponding relation.

And 104, adjusting the CCE aggregation level of the physical downlink control channel PDCCH of the terminal to a target CCE aggregation level.

In this step, the network side device configures the CCE aggregation level of the PDCCH of the terminal as a target CCE aggregation level.

In the embodiment of the invention, a first SINR corresponding to a CQI and a second SINR corresponding to the DCI are determined by determining the DCI sent to a terminal and receiving the CQI reported by the terminal; obtaining a target SINR according to the first SINR and the second SINR; determining a target first corresponding relation according to the DCI bit number of the DCI, and determining a target CCE aggregation level corresponding to the target SINR; finally, adjusting the CCE aggregation level of the physical downlink control channel PDCCH of the terminal to be a target CCE aggregation level; the target SINR is determined through the DCI and the CQI, the channel quality is accurately reflected, and the phenomenon that when the channel quality changes, the SINR changes obviously and the CCE aggregation level is adjusted frequently is avoided. Meanwhile, the first corresponding relation between the SINR and the CCE aggregation level is determined based on the DCI bit number, so that the CCE aggregation level is adaptive to the DCI bit number, PDCCH resources are reasonably utilized, and the condition that the CCE aggregation level is selected and does not accord with the actual channel environment is avoided. The embodiment of the invention solves the problem that the utilization of PDCCH resources is influenced by adjusting the CCE aggregation level through the MCS level in the prior art.

Optionally, in this embodiment of the present invention, the step of determining the SINR of the first signal to interference plus noise ratio corresponding to the CQI includes:

correcting the CQI to obtain a corrected target CQI;

determining a first signal to interference plus noise ratio (SINR) corresponding to the target CQI according to a preset second corresponding relation; the second correspondence is a correspondence between CQI and SINR.

The basic principle of the method is that according to Acknowledgement (ACK)/non-Acknowledgement (NACK) feedback information of data Block transmission, adaptive correction and adjustment are performed on CQI measurement quantity provided by a physical layer reporting or CQI reconstruction module, so that a target Block Error Rate (BLER) is adjusted to a range required by a system, and system performance is improved; wherein, BLER is carried by the terminal in CQI and reported to the network side equipment. For example, an optional correction method is that the network side device determines a step size of CQI correction and a step size adjustment multiple according to an initial BLER; when receiving the NACK message, the network side device adjusts the Size (Transport Block Set Size, RTBS) of the Transport Block Set in the CQI fed back by the terminal downward, where the adjustment Size is the product of the step Size and the adjustment multiple; and when the network side equipment receives the ACK message, the RTBS in the CQI fed back by the terminal is adjusted upwards, and the size is adjusted to be the step length. Thus, by adjusting the RTBS in the CQI, the corrected target CQI is obtained.

After the target CQI is obtained, determining a first SINR corresponding to the target CQI according to a preset second corresponding relation; the second corresponding relation is the corresponding relation between CQI and SINR; as a first example, see table 1 below, where table 1 shows a second correspondence:

table 1:

optionally, in this embodiment of the present invention, the step of determining the second SINR corresponding to the DCI includes:

the first step is to determine the service type indicated by the DCI and the initial SINR of the terminal in the current period of the CQI.

The service type comprises the uplink service and/or the downlink service, or both the uplink service and the downlink service; the initial SINR is the current actual SINR of the terminal; the network side device determines the current actual SINR of the terminal according to a Sounding Reference Signal (SRS) reported by the terminal.

As one implementation manner, the process of determining the terminal SINR by the network side device is as follows:

since SINR is SRS received power/(interference power + noise power), where SRS received power is SRS transmit power plus link loss, and interference power is the sum of SRS received power of all terminals in neighboring cells. Network side equipment receives the SRS reported by the terminal and all the adjacent cell terminals, wherein the SRS reported by the terminal comprises SRS transmitting power and link loss, and then the SRS receiving power of the terminal is determined; the SRS reported by the adjacent cell terminal comprises the SRS receiving power of all the adjacent cell terminals; and the auxiliary base station also receives the noise power of the terminal, and then obtains the current actual SINR of the terminal according to the SRS receiving power, the interference power and the noise power of the terminal.

And secondly, adjusting the initial SINR according to the service type to obtain an intermediate SINR.

The SINR requirements corresponding to different types of services are different, and in general, the SINR required for uplink service traffic is lower than the SINR required for downlink service traffic, so that an intermediate SINR is obtained after the initial SINR is adjusted according to a specific service type.

Thirdly, determining a second SINR of the current period of the CQI according to the following formula:

SINRdci(k)＝α*SINRdci(k-1)+SINRdci

wherein alpha is a preset coefficient value, namely a forgetting factor, and the value range is [0, 1 ]; k is used to indicate the current period k of the CQI, SINRdci (k) is the second SINR, SINRdci (k-1) is the second SINR of the previous period of the current period of the CQI, SINRdci is the intermediate SINR. A second SINR for the kth period (i.e., the current period) of the CQI, which is equal to the sum of the product of the second SINR of the last period and alpha and the intermediate SINR; and the second SINR in the current period is influenced by the second SINR in the previous period, so that when the channel environment changes suddenly and well, the network side equipment cannot immediately reduce the CCE aggregation level when the PDCCH resources are allocated, a buffer amount is kept, and the CCE aggregation level is prevented from changing too severely.

Optionally, in an embodiment of the present invention, the second step includes three cases, a case one, a case two, or a case three, specifically:

the first condition is as follows: if the service type comprises an uplink service and does not comprise a downlink service, performing activation detection on an uplink shared channel (PUSCH) corresponding to uplink DCI of the terminal; if the detection result is that the initial SINR is increased by a first preset adjustment value, an intermediate SINR is obtained; and if the detection result is that the signal is not passed, reducing the initial SINR by a second preset adjustment value to obtain an intermediate SINR.

If the service type includes an uplink service and does not include a downlink service, for example, the DCI of the terminal only includes an uplink DCI, the activation detection is performed on the PUSCH. The activation detection is energy activation detection, for example, a physical layer of a network side device performs signal-to-noise ratio detection on data reported by a terminal at a resource location scheduled by a Media Access Control (MAC) layer, and determines whether a detected signal-to-noise ratio is greater than a preset signal-to-noise ratio threshold, if so, the activation detection result is considered to be passed, otherwise, the activation detection result is considered to be not passed.

If the detection result passes, increasing the initial SINR by a first preset adjustment value lambda 1; if not, the initial SINR is reduced by a second preset adjusting value lambda 2 so as to correct the initial SINR.

When there is DCI scheduled in the up run, if the PUSCH activation detection succeeds, the terminal is considered to have received the PDCCH sent by the network side equipment, and then a Step length is adjusted upwards (Step); if the activation detection fails, the terminal is considered not to detect the PDCCH, and a Step is adjusted downwards.

Case two: if the service type comprises a downlink service and an uplink service, performing activation detection on a PUSCH corresponding to uplink DCI of the terminal; the detection result is that the initial SINR is increased by the first preset adjustment value to obtain an intermediate SINR; and if the detection result is not passed, performing energy activation detection on the N downlink feedbacks of the terminal, and adjusting the initial SINR according to the detection result to obtain an intermediate SINR.

If the service type includes an uplink service and a downlink service, for example, the DCI of the terminal includes both uplink DCI and downlink DCI, the activation detection is performed on the PUSCH. If the detection result passes, increasing the initial SINR by a first preset adjustment value lambda 1; if not, performing energy activation detection on the N downlink feedback information of the terminal, and adjusting the initial SINR according to a detection result to obtain an intermediate SINR; n is a preset value.

Case three: and if the service type comprises the downlink service and does not comprise the uplink service, performing energy activation detection on the N downlink feedback information of the terminal, and adjusting the initial SINR according to a detection result to obtain an intermediate SINR.

If the service type only includes downlink service, performing energy activation detection on the N downlink feedback information of the terminal, judging whether the terminal has received a PDCCH sent by network side equipment, and adjusting the initial SINR according to a detection result to obtain an intermediate SINR; n is a preset value.

Further, in the second and third cases, in the embodiment of the present invention, the step of performing energy activation detection on the N downlink feedback information of the terminal, and adjusting the initial SINR according to a detection result to obtain an intermediate SINR includes:

the detection result is that the initial SINR is increased by N third preset adjustment values to obtain an intermediate SINR;

and if the detection result is that the signal is not passed, reducing the initial SINR by N fourth preset adjustment values to obtain an intermediate SINR.

The downlink feedback information is used for indicating the success or failure condition of the uplink transmission of the terminal. The success or failure condition of uplink transmission refers to whether the network side device successfully receives uplink data sent by the terminal. In general, a network side device sends downlink feedback information in a group common search space corresponding to a terminal. And performing energy activation detection on the N downlink feedback information of the terminal, wherein the detection result is that the initial SINR is increased by N third preset adjustment values lambda 3 when the N downlink feedback information of the terminal passes, and the detection result is that the initial SINR does not pass, and the initial SINR is reduced by N fourth preset adjustment values lambda 4 to correct the initial SINR to obtain an intermediate SINR.

It can be understood that, in the embodiment of the present invention, the first preset adjustment value λ 1, the second preset adjustment value λ 2, the N third preset adjustment values λ 3, and the N fourth preset adjustment values λ 4 are all preset adjustment threshold values, and the four values may be the same, for example, all are 0.2 (dB); or may be different.

As a second example, referring to fig. 2, fig. 2 shows a process of determining a second SINR corresponding to the DCI, including the following steps:

step 201, allocating the CCE resources of the current CQI in the kth period to obtain the current actual initial SINR, wherein the initial SINR is SINRdci 0;

step 201, judging whether the terminal has downlink service: if yes, go to step 207; if not, go to step 203;

step 203, judging whether the terminal has an uplink service: if yes, go to step 204; if not, go to step 212, SINRdci (k) ═ α + SINRdci (k-1) + SINRdci;

SINRdci0 is now SINRdci.

For the case of only uplink traffic, step 204 and step 206 are performed:

step 204, determining whether activation detection of the PUSCH corresponding to the uplink DCI is successful: if yes, go to step 206; if not, go to step 205.

Step 205, the initial SINR is adjusted up by one Step level λ 2,

SINRdci — SINRdci0+ λ 2, and step 212 is performed.

Step 206, the initial SINR is down-regulated by a Step level λ 1,

SINRdci0- λ 1, and step 212 is performed.

For the case of downlink traffic:

step 207, determining whether there is an uplink service: if yes, go to step 208; if not, go to step 209.

Step 208, determining whether activation detection of the PUSCH corresponding to the uplink DCI is successful: if yes, go to step 206; if not, go to step 209.

Step 209, determining whether the N downlink feedbacks pass the activation detection: if yes, go to step 210; if not, go to step 211.

Step 210, the initial SINR is adjusted up by one Step level 3,

SINRdci — SINRdci0+ λ 3, and step 212 is performed.

Step 211, the initial SINR is down-regulated by a Step level λ 4,

SINRdci0- λ 4, and step 212 is performed.

Step 212, SINRdci (k) ═ SINRdci (k-1) + SINRdci;

wherein alpha is a preset coefficient value, namely a forgetting factor, and the value range is [0, 1 ]; k is used to indicate that it is currently in the k-th period of the CQI, sinrdci (k) is the second SINR,

SINRdci (k-1) is the second SINR of the previous period of the current period of the CQI, and SINRdci is the intermediate SINR.

Optionally, in this embodiment of the present invention, the obtaining a target SINR according to the first SINR and the second SINR includes:

summing the first SINR and the second SINR to obtain a target SINR, and taking the target SINR as a reference of channel quality; the target SINR determined by the DCI and the CQI can reflect the channel quality more accurately relative to the MCS, and the SINR is determined by two parameters, so that the phenomenon that the SINR changes obviously and the CCE aggregation level is adjusted frequently when the channel quality changes is avoided.

Optionally, in this embodiment of the present invention, the step of determining a target first corresponding relationship according to the DCI bit number of the DCI, and determining a target CCE aggregation level corresponding to the target SINR includes:

determining a target DCI of the terminal, wherein the target DCI is a DCI with a large bit value in uplink DCI and downlink DCI;

determining a preset first corresponding relation of the target DCI;

and determining a target CCE aggregation level corresponding to the target SINR according to the first corresponding relation.

Firstly, determining target DCI with a larger bit number value in terminal DCI; then, determining a first corresponding relation according to the target DCI, wherein the first corresponding relation is the corresponding relation between the SINR and the CCE aggregation level; and finally, searching a target CCE aggregation level corresponding to the target SINR in the target first corresponding relation.

As a third example, see table 2 and table 3 below, which show examples of the first corresponding relationship, where table 2 is the first corresponding relationship when the uplink DCI is 47 bits, and table 3 is the first corresponding relationship when the downlink DCI is 47 bits:

table 2:

SINR(dB)	CCE aggregation levels
		4.21	1
0.85	2
		-2.05	4
-4.08	8
		-7.45	16

Table 3:

SINR(dB)	CCE aggregation levels
		5.54	1
1.37	2
		-2.02	4
-4.06	8
		-6.03	16

The method for adjusting the CCE aggregation level of a control channel element according to the embodiment of the present invention is described above, and the apparatus for adjusting the CCE aggregation level of a control channel element according to the embodiment of the present invention is described below with reference to the accompanying drawings.

Referring to fig. 3, an embodiment of the present invention further provides a device for adjusting CCE aggregation levels, which is applied to a network side device, where the network side device may be a base station BS, and the base station is a device deployed in an access network and configured to provide a wireless communication function for a terminal. The base stations may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. In systems using different radio access technologies, the names of devices that function as base stations may differ, for example, in a 5G NR system, a base station is called a nodeb or a gNB. The name "base station" may change as communication technology evolves. Further, the terminal can include various handheld devices having wireless communication capabilities, vehicle mounted devices, wearable devices, computing devices, or other processing devices connected to wireless modems, as well as various forms of mobile stations, user equipment, and the like.

The device comprises:

an SINR determining module 301, configured to determine downlink control information DCI sent to a terminal, receive a channel quality indicator CQI reported by the terminal, determine a first signal to interference plus noise ratio SINR corresponding to the CQI, and determine a second SINR corresponding to the DCI.

The network side equipment determines DCI which is issued to the terminal, and the DCI is carried by the PDCCH and comprises information such as uplink and downlink resource allocation, HARQ information, power control and the like. Different DCI information, whose roles are different; for example, DCI allocated to downlink RBs, DCI allocated to uplink RBs, DCI adjusted for uplink power control, DCI for downlink dual-stream space division multiplexing, and the like. The protocols classify these DCIs and distinguish them with different DCI formats. For example, in the protocol version R9, the following DCI are defined: DCI0, DCI1, DCI1A, DCI1B, DCI1C, DCI1D, DCI2, DCI2A, DCI2B, DCI3, DCI 3A; the DCI0, the DCI3, and the DCI3A are DCI types related to an uplink PUSCH or PUCCH, and are referred to as uplink DCI in the embodiment of the present invention; the DCI1, the DCI1A, the DCI1B, the DCI1C, the DCI1D, the DCI2, the DCI2A, and the DCI2B are DCI types for the downlink PDSCH, and are referred to as downlink DCI in the embodiment of the present invention.

CQI is a measurement standard of communication quality of a wireless channel; in general, a higher value of CQI represents a higher communication quality of its channel. The terminal sends the CQI to a network side device (such as a base station) on the PUCCH and the PUSCH. And the network side equipment obtains the CQI value, evaluates the channel quality according to the CQI value and schedules the PDSCH.

The network side equipment receives CQI reported by a terminal and determines a first SINR corresponding to the CQI; and determining a second SINR corresponding to the DCI according to the DCI issued to the terminal. Specifically, SINR refers to the ratio of the strength of a received useful signal to the strength of a received interfering signal (noise and interference); optionally, in the process of determining the SINR, the base station places the uplink SRS of each UE in the last block of one subframe. The frequency domain spacing of the SRS is two equivalent subcarriers, so the SRS of one UE interferes only with the SRS of other UEs.

Therefore, SINR is SRS received power/(interference power + noise power);

The SINR processing module 302 is configured to obtain a target SINR according to the first SINR and the second SINR.

Obtaining a target SINR according to SINRs corresponding to the DCI and the CQI respectively, and taking the target SINR as a reference of channel quality; the target SINR determined by the DCI and the CQI can reflect the channel quality more accurately relative to the MCS, and the SINR is determined by two parameters, so that the phenomenon that the SINR changes obviously and the CCE aggregation level is adjusted frequently when the channel quality changes is avoided.

A rank determining module 303, configured to determine a target first corresponding relationship according to the DCI bit number of the DCI, and determine a target CCE aggregation level corresponding to the target SINR; wherein, the first corresponding relation is the corresponding relation between the SINR and the CCE aggregation level.

A level adjustment module 304, configured to adjust a CCE aggregation level of a physical downlink control channel PDCCH of the terminal to a target CCE aggregation level.

The rank adjustment module 304 configures a CCE aggregation level of a PDCCH of the terminal as a target CCE aggregation level.

Optionally, in this embodiment of the present invention, the SINR determining module 301 includes:

the correcting submodule is used for correcting the CQI to obtain a corrected target CQI;

a first determining submodule, configured to determine, according to a preset second correspondence, a first signal to interference plus noise ratio SINR corresponding to the target CQI; the second correspondence is a correspondence between CQI and SINR.

a second determining submodule, configured to determine a service type indicated by the DCI and an initial SINR of the terminal in a current CQI period;

the adjusting submodule is used for adjusting the initial SINR according to the service type to obtain an intermediate SINR;

a third determining submodule, configured to determine a second SINR of the CQI in the current period according to the following formula:

SINRdci(k)＝α*SINRdci(k-1)+SINRdci

wherein α is a preset coefficient value, SINRdci (k) is the second SINR, SINRdci (k-1) is the second SINR of the previous period of the current period of the CQI; SINRdci is the intermediate SINR.

Optionally, in an embodiment of the present invention, the adjusting sub-module includes:

a first adjusting unit, configured to perform activation detection on an uplink shared channel PUSCH corresponding to uplink DCI of the terminal if the service type includes an uplink service and does not include a downlink service; if the detection result is that the initial SINR is increased by a first preset adjustment value, an intermediate SINR is obtained; if the detection result is that the signal is not passed, reducing the initial SINR by a second preset adjustment value to obtain an intermediate SINR;

a second adjusting unit, configured to perform activation detection on a PUSCH corresponding to an uplink DCI of the terminal if the service type includes a downlink service and an uplink service; the detection result is that the initial SINR is increased by the first preset adjustment value to obtain an intermediate SINR; if the detection result is not passed, performing energy activation detection on the N downlink feedback information of the terminal, and adjusting the initial SINR according to the detection result to obtain an intermediate SINR;

and a third adjusting unit, configured to perform energy activation detection on the N downlink feedback information of the terminal if the service type includes a downlink service and does not include an uplink service, and adjust the initial SINR according to a detection result to obtain an intermediate SINR.

Optionally, in this embodiment of the present invention, the second adjusting unit and/or the third adjusting unit are further configured to:

and summing the first SINR and the second SINR to obtain a target SINR.

Optionally, in this embodiment of the present invention, the level determining module 303 includes:

a fourth determining submodule, configured to determine a target DCI of the terminal, where the target DCI is a DCI with a large bit value in an uplink DCI and a downlink DCI;

determining a preset first corresponding relation of the target DCI;

The control channel element CCE aggregation level adjustment apparatus provided in the embodiment of the present invention may implement each process implemented by the base station side in the method embodiments of fig. 1 to fig. 2, and is not described here again to avoid repetition.

In the embodiment of the present invention, the SINR determining module 301 determines DCI sent to a terminal, receives a CQI reported by the terminal, determines a first SINR corresponding to the CQI, and determines a second SINR corresponding to the DCI; the SINR processing module 302 obtains a target SINR according to the first SINR and the second SINR; the level determining module 303 determines a target first corresponding relationship according to the DCI bit number of the DCI, and determines a target CCE aggregation level corresponding to the target SINR; the level adjustment module 304 adjusts the CCE aggregation level of the PDCCH of the terminal to a target CCE aggregation level; the target SINR is determined through the DCI and the CQI, the channel quality is accurately reflected, and the phenomenon that when the channel quality changes, the SINR changes obviously and the CCE aggregation level is adjusted frequently is avoided. Meanwhile, the first corresponding relation between the SINR and the CCE aggregation level is determined based on the DCI bit number, so that the CCE aggregation level is adaptive to the DCI bit number, PDCCH resources are reasonably utilized, and the condition that the CCE aggregation level is selected and does not accord with the actual channel environment is avoided.

On the other hand, the embodiment of the present invention further provides an electronic device, which includes a memory, a processor, a bus, and a computer program stored on the memory and executable on the processor, where the processor implements the steps in the above method for adjusting the CCE aggregation level when executing the program.

For example, fig. 4 shows a schematic physical structure diagram of an electronic device.

As shown in fig. 4, the electronic device may include: a processor (processor)410, a communication Interface 420, a memory (memory)430 and a communication bus 440, wherein the processor 410, the communication Interface 420 and the memory 430 are communicated with each other via the communication bus 440. The processor 410 may call logic instructions in the memory 430 to perform the following method:

obtaining a target SINR according to the first SINR and the second SINR;

In addition, the logic instructions in the memory 430 may be implemented in the form of software functional units and stored in a computer readable storage medium when the software functional units are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

In still another aspect, an embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program is implemented to, when executed by a processor, perform the method for adjusting a CCE aggregation level provided in the foregoing embodiments, for example, the method includes:

obtaining a target SINR according to the first SINR and the second SINR;

The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A method for adjusting CCE aggregation level is applied to network side equipment, and is characterized in that the method comprises the following steps:

determining Downlink Control Information (DCI) sent to a terminal, receiving a Channel Quality Indication (CQI) reported by the terminal, determining a first SINR corresponding to the CQI, and determining a second SINR corresponding to the DCI, wherein a service type indicated by the DCI and an initial SINR of the current period of the CQI of the terminal are determined, the service type includes uplink service and/or downlink service, or neither of the uplink service and the downlink service, the initial SINR is adjusted according to the service type to obtain an intermediate SINR, the second SINR of the current period of the CQI is determined according to the following formula, SINRdci (k) ═ SINRdci (k-1) + SINRdci, wherein α is a preset coefficient value, SINRdci (k) is the second SINR, and SINRdci (k-1) is the second SINR of the previous period of the current period of the CQI; SINRdci is the intermediate SINR;

obtaining a target SINR according to the first SINR and the second SINR;

2. The method of claim 1, wherein the determining the first SINR for the CQI comprises:

correcting the CQI to obtain a corrected target CQI;

determining a first SINR corresponding to the target CQI according to a preset second corresponding relation; the second correspondence is a correspondence between CQI and SINR.

3. The method for adjusting the CCE aggregation level according to claim 1, wherein the step of adjusting the initial SINR according to the service type to obtain an intermediate SINR includes:

if the service type comprises an uplink service and does not comprise a downlink service, performing activation detection on an uplink shared channel (PUSCH) corresponding to uplink DCI of the terminal; if the detection result is that the initial SINR is increased by a first preset adjustment value, an intermediate SINR is obtained; if the detection result is that the signal is not passed, reducing the initial SINR by a second preset adjustment value to obtain an intermediate SINR;

if the service type comprises a downlink service and an uplink service, performing activation detection on a PUSCH corresponding to uplink DCI of the terminal; the detection result is that the initial SINR is increased by the first preset adjustment value to obtain an intermediate SINR; if the detection result is not passed, performing energy activation detection on the N downlink feedback information of the terminal, and adjusting the initial SINR according to the detection result to obtain an intermediate SINR;

and if the service type comprises the downlink service and does not comprise the uplink service, performing energy activation detection on the N downlink feedback information of the terminal, and adjusting the initial SINR according to a detection result to obtain an intermediate SINR.

4. The method for adjusting CCE aggregation levels according to claim 3, wherein the step of performing energy activation detection on the N downlink feedback information of the terminal and adjusting the initial SINR according to the detection result to obtain an intermediate SINR includes:

5. The method for adjusting CCE aggregation levels according to claim 1, wherein the step of obtaining a target SINR based on the first SINR and the second SINR comprises:

and summing the first SINR and the second SINR to obtain a target SINR.

6. The method according to claim 1, wherein the step of determining a target first mapping relationship and determining a target CCE aggregation level corresponding to the target SINR according to the DCI bit number of the DCI comprises:

determining a preset first corresponding relation of the target DCI;

7. A Control Channel Element (CCE) aggregation level adjustment device is applied to network side equipment, and is characterized in that the device comprises:

an SINR determining module, configured to determine downlink control information DCI sent to a terminal, receive a channel quality indicator CQI reported by the terminal, determine a first SINR corresponding to the CQI, and determine a second SINR corresponding to the DCI, where a service type indicated by the DCI and an initial SINR of a current period of the CQI of the terminal are determined, the service type includes uplink service and/or downlink service, or neither of them includes uplink service and/or downlink service, the initial SINR is adjusted according to the service type to obtain an intermediate SINR, and the second SINR of the current period of the CQI is determined according to the following formula, where α is a preset coefficient value, SINRdci (k) is the second SINR, and SINRdci (k-1) is a second SINR of a previous period of the current period of the CQI; SINRdci is the intermediate SINR;

8. The Control Channel Element (CCE) aggregation level adjustment apparatus of claim 7, wherein the SINR determination module comprises:

the first determining submodule is used for determining a first SINR corresponding to the target CQI according to a preset second corresponding relation; the second correspondence is a correspondence between CQI and SINR.

9. The apparatus of claim 8, wherein the adjusting submodule comprises:

10. The Control Channel Element (CCE) aggregation level adjustment apparatus according to claim 9, wherein the second and/or third adjustment unit is further configured to:

11. The apparatus for adjusting CCE aggregation levels according to claim 7, wherein the step of obtaining a target SINR from the first SINR and the second SINR comprises:

and summing the first SINR and the second SINR to obtain a target SINR.

12. The Control Channel Element (CCE) aggregation level adjustment apparatus of claim 7, wherein the level determination module comprises:

determining a preset first corresponding relation of the target DCI;

13. An electronic device comprising a processor, a memory and a computer program stored on the memory and executable on the processor, characterized in that the computer program, when executed by the processor, implements the steps of the control channel element, CCE, aggregation level adjustment method according to any one of the claims 1 to 6.

14. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the control channel element, CCE, aggregation level adjustment method according to any one of the claims 1 to 6.