User equipment energy-saving control method based on dynamic configuration information and new radio NR system

Abstract

The invention provides a user equipment energy-saving control method based on dynamic configuration information and a new radio NR system, and the method comprises the steps: 1, redesigning downlink control information, and adding a flag bit used for representing an authorization interval; step 2, the base station calculates an authorization interval of the user equipment in a process of scheduling uplink and downlink data of the user equipment; step 3, setting a corresponding flag bit in downlink control information according to the authorization interval; 4, the user equipment monitors a physical downlink control channel, if missing detection does not occur, downlink control information is obtained, the added flag bit is analyzed, the authorization interval is obtained, the step 5 is executed, and otherwise, the step 4 is repeatedly executed; step 5, the user equipment stops monitoring the physical downlink control channel according to the authorization interval; the system adopts the method to perform energy-saving control. According to the invention, the power consumption of the UE in the NR system is effectively reduced, and invalid PDCCH blind detection is significantly reduced.

Description

Technical Field

[0001] The present invention relates to a method for controlling energy saving of a user equipment and a New Radio (NR) system, and particularly to a method for controlling energy saving of a user equipment and a New Radio (NR) system based on dynamically configured information. Background Art

[0002] The information provided in this section is only background information related to the present disclosure, and it does not necessarily represent the prior art.

[0003] In a New Radio (NR) system, power consumption is a very critical performance indicator of a User Equipment (UE). Especially in the NR system, a larger bandwidth and higher rate may bring greater power consumption to the UE, reducing the battery life of the terminal. Therefore, in the application of 5G systems, reducing the power consumption of the terminal is a great challenge. Currently, there are already some mechanisms to reduce the power consumption of the UE, such as Discontinuous Reception (DRX) and Bandwidth Adaptation (BA).

[0004] As a key technology for UE energy saving, DRX has been widely applied. After starting DRX, the UE can periodically enter the sleep state, that is, it does not need to monitor the Physical Downlink Control Channel (PDCCH), thereby improving the battery usage efficiency. At the same time, 5G base stations provide flexible C-DRX parameters, such as short DRX cycles, long DRX cycles, onDuring Timer, etc. Ideally, the base station can select the best DRX parameters according to the service mode to provide the best energy saving gain and performance guarantee for each UE. However, in an actual system, the parameters are usually static and not often modified. Especially during the service process, the rapid changes in traffic load and traffic pattern are not easy to dynamically change the parameters. In addition, in a multi-user real network, the scheduling interval (grant interval) of the base station for the UE is determined by many factors, such as user application interaction, the number of UEs in the system, traffic type, scheduling strategy, etc. Therefore, the statistical characteristics of the dynamically changing grant interval cannot be described by a single number. So, in the Radio Resource Control (RRC) connected mode, it is necessary to study energy saving solutions with dynamic adaptability and considering different service characteristics.

[0005] It should be noted that the information disclosed in the above background art section is only used to strengthen the understanding of the background of the present disclosure, and thus may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0006] Objective of the Invention: The technical problem to be solved by the present invention is to provide a user equipment energy-saving control method and a new radio (NR) system based on dynamic configuration information in view of the deficiencies of the prior art.

[0007] To solve the above technical problem, the present invention discloses a user equipment energy-saving control method and a new radio (NR) system based on dynamic configuration information, wherein the method comprises the following steps:

[0008] Step 1: Redesign the downlink control information and add a flag bit for indicating the authorization interval.

[0009] Step 2: During the process of the base station scheduling the uplink and downlink data of the user equipment, calculate the authorization interval of the user equipment.

[0010] Step 3: Set the corresponding flag bit in the downlink control information according to the authorization interval.

[0011] Step 4: The user equipment monitors the physical downlink control channel. If no missed detection occurs, obtain the downlink control information, parse the flag bit added in Step 1 to obtain the authorization interval, and execute Step 5; otherwise, repeat Step 4.

[0012] Step 5: The user equipment suspends monitoring the physical downlink control channel according to the authorization interval obtained in Step 4 to achieve energy saving of the equipment.

[0013] Further, the redesign of the downlink control information in Step 1 includes:

[0014] In the downlink control information defined by the original protocol, add flag bits for indicating the authorization interval, namely the uplink authorization interval field and the downlink authorization interval field, for transmitting the authorization interval.

[0015] Further, the uplink authorization interval field in Step 1, that is, add an uplink authorization interval indication value in the DCI0_0 information and DCI0_1 information of 3GPP protocol 38.212.

[0016] Further, the uplink authorization interval indication value is defined as follows:

[0017] 00 indicates that the authorization interval is 0, that is, continuous monitoring without interruption;

[0018] 01 indicates that the authorization interval is 2, that is, continuous monitoring after interruption for 2 unit times;

[0019] 10 indicates that the authorization interval is 5, that is, continuous monitoring after interruption for 5 unit times;

[0020] 11 indicates that the authorization interval is 10, that is, continuous monitoring after interruption for 10 unit times.

[0021] Further, for the downlink grant interval field described in step 1, that is, a downlink grant interval indication value is added to the DCI1_0 information and DCI1_1 information in 3GPP protocol 38.212.

[0022] Further, the downlink grant interval indication value is defined as follows:

[0023] 00 indicates that the grant interval is 0, that is, continuous monitoring without interruption;

[0024] 01 indicates that the grant interval is 2, that is, continuous monitoring after interrupting for 2 unit times;

[0025] 10 indicates that the grant interval is 5, that is, continuous monitoring after interrupting for 5 unit times;

[0026] 11 indicates that the grant interval is 10, that is, continuous monitoring after interrupting for 10 unit times.

[0027] Further, calculating the grant interval of the user equipment described in step 2 includes:

[0028] During the process of the base station scheduling the uplink and downlink data of the user equipment, according to the application program interaction on the user equipment, the number of user equipment, the service traffic type, the scheduling strategy, and the QoS performance, the uplink grant interval or the downlink grant interval of a single user equipment is calculated in real time.

[0029] Further, the real-time calculation of the grant interval of a single user equipment described in step 2 specifically includes:

[0030] For downlink data, the base station calculates the downlink grant interval according to the size of the downlink data traffic, the traffic type, and the bearer type;

[0031] For uplink data, the base station calculates the uplink grant interval according to the size of the buffer status report value reported by the user equipment and the type of the logical channel group.

[0032] Further, pausing to listen to the physical downlink control channel described in step 5 includes:

[0033] If the uplink grant interval is parsed from the DCI0_0 information or DCI0_1 information, during this grant interval, the user equipment no longer listens to the uplink DCI information in the physical downlink control channel;

[0034] If the downlink grant interval is parsed from the DCI1_0 information or DCI1_1 information, during this grant interval, the user equipment no longer listens to the downlink DCI information in the PDCCH channel.

[0035] The present invention also proposes a new radio NR system that performs energy-saving control by using the foregoing method.

[0036] Beneficial effects:

[0037] 1. The method proposed by the present invention dynamically indicates the scheduling authorization interval of the UE in the uplink and downlink DCI authorization. During the authorization interval, the UE does not need to monitor the corresponding PDCCH, thereby reducing the number of ineffective blind detections of the PDCCH and entering the low-power state.

[0038] 2. The present invention can be used as a complement to the DRX function. In the active state outside the DRX sleep cycle, that is, during the drx-InactivityTimer, the UE can reduce the ineffective blind detection of the PDCCH by parsing the scheduling authorization interval in the DCI, thereby facilitating the energy saving of the UE. Description of the drawings

[0039] The following further specifically describes the present invention in conjunction with the drawings and specific embodiments, and the above and / or other advantages of the present invention will become clearer.

[0040] Figure 1 It is a schematic diagram of the processing flow of the authorization interval proposed by the present invention. Specific embodiments

[0041] The general idea of the present invention is as follows: The base station side knows the arrival situation of data packets, buffer status, the number of scheduled UEs, etc. When the base station sends authorization to the UE, it can estimate the duration between the next authorization sent to this UE, that is, the authorization interval. Therefore, the base station side can estimate the authorization interval. During each authorization scheduling, control information is carried in the DCI (Downlink Control Information) to inform the UE of the next scheduling authorization interval. During this interval, the UE does not need to monitor the PDCCH, enabling the UE to enter the low-power state. This optimization is mainly aimed at reducing the number of ineffective blind detections of the PDCCH in the active state outside the DRX, thereby achieving the purpose of saving the power of the terminal.

[0042] The technical solution proposed by the present invention is as follows: A method for dynamically indicating the scheduling authorization interval of the UE in the uplink and downlink DCI authorization. During the authorization interval, the UE does not need to monitor the corresponding PDCCH and enters the low-power state, thereby achieving the purpose of reducing the power consumption of the terminal.

[0043] The uplink and downlink data interactions between the base station and the terminal are both indicated by the DCI information carried on the PDCCH channel. According to the 3GPP protocol, DCI0_0 information and DCI0_1 information are used for the transmission indication of the uplink PUSCH (Physical Uplink Shared Channel) channel data. After the UE blindly detects DCI0_0 or DCI0_1, it can know at which time-frequency resource positions and with what modulation and coding methods, etc., to send the uplink PUSCH data; DCI1_0 information and DCI1_1 information are used for the transmission indication of the downlink PDSCH (Physical Downlink Shared Channel) channel data. After the UE blindly detects DCI0_0 or DCI0_1, it can know the time-frequency resource positions, modulation and coding methods, etc., mapped by the downlink PDSCH, and then parse the downlink data. Therefore, the DCI control information carried on the PDCCH channel plays a very crucial role in the transmission and reception of uplink and downlink data. However, the blind detection of the PDCCH channel on the UE side consumes a large amount of power. In particular, during the actual service process, due to various reasons such as the number of UEs in the system, service traffic types, and scheduling strategies, the authorized scheduling for a certain UE is very likely to be discontinuous. However, the UE side is not aware of the scheduling situation on the base station side and can only continuously monitor the PDCCH according to the current state to obtain the expected data scheduling indication information, which may lead to a large number of invalid blind detections of the PDCCH and increase the UE power consumption.

[0044] Although there is currently a DRX function to solve the problem of continuous detection of the PDCCH, within the DRX cycle, the UE enters the sleep state and does not detect the PDCCH. However, the UE will still be periodically awakened to receive possible downlink data and enter the Onduration state. If the UE does not receive the PDCCH scheduling information during this period, the UE will continue to enter the sleep state; if the UE detects the PDCCH scheduling information sent by the base station to itself, the UE needs to start the drx-InactivityTimer timer to maintain an awake state for a period of time to receive the downlink data. The UE will start or restart the drx-InactivityTimer timer every time it receives the PDCCH until the drx-InactivityTimer timer times out, and then the UE continues to enter the sleep state. During the timing of the drx-InactivityTimer, the UE also needs to continuously monitor the PDCCH to obtain possible data scheduling indication information, which may also lead to a large number of invalid blind detections of the PDCCH and increase the UE power consumption.

[0045] Therefore, in scenarios with or without DRX functionality, since the UE side is unaware of the specific scheduling situation on the base station side, a large number of blind detections of invalid PDCCHs occur, thereby increasing the power consumption and processing delay of the UE. The present invention proposes a method for dynamically indicating the scheduling authorization interval of the UE in uplink and downlink DCI authorizations. During the authorization interval, the UE can refrain from listening to the corresponding PDCCH and enter a low-power state, thereby achieving the purpose of saving the power consumption of the terminal. A 2-bit control information is used to indicate the authorization interval.

[0046] For the uplink authorization interval in DCI0_0, a new field "UL grant intermission" is added to the DCI0_0 section (7.3.1.1.1) of Protocol 38.212. The uplink authorization interval indication values and the corresponding uplink authorization intervals are shown in Table 1, which is the 4th table in Section 7.3.1.1.1.

[0047] Table 1 Uplink authorization interval table in DCI0_0 of 7.3.1.1.1-4

[0048] Uplink grant interval indication value Adopted uplink grant interval 00 0 01 2 10 5 11 10

[0049] For the uplink authorization interval in DCI0_1, a new field "UL grant intermission" is added to the DCI0_1 section (7.3.1.1.2) of Protocol 38.212. The uplink authorization interval indication values and the corresponding uplink authorization intervals are shown in Table 2, which is the 33rd table in Section 7.3.1.1.2.

[0050] Table 2 Uplink authorization interval table in DCI0_1 of 7.3.1.1.2-33

[0051] Uplink grant interval indication value Adopted uplink grant interval 00 0 01 2 10 5 11 10

[0052] For the downlink authorization interval in DCI1_0, a new field "DL grant intermission" is added to the DCI1_0 section (7.3.1.2.1) of Protocol 38.212. The downlink authorization interval indication values and the corresponding downlink authorization intervals are shown in Table 3, which is the 3rd table in Section 7.3.1.2.1.

[0053] Table 3 Downlink authorization interval table in DCI1_0 of 7.3.1.2.1-3

[0054] Downlink grant interval indication value Adopted downlink grant interval 00 0 01 2 10 5 11 10

[0055] For the downlink grant intermission in DCI1_1, a new field "DL grant intermission" is added to the section (7.3.1.2.2) of DCI1_1 in Protocol 38.212. The downlink grant intermission indication values and the corresponding downlink grant intermissions are shown in Table 4, that is, the 6th table in Section 7.3.1.2.2.

[0056] Table 4 Downlink Grant Intermission Table in 7.3.1.2.2-6 DCI1_1

[0057] Downlink grant interval indication value Adopted downlink grant interval 00 0 01 2 10 5 11 10

[0058] For Tables 1, 2, 3, and 4, 2-bit information is used to indicate the grant intermission. Among them, the 00 bit indicates that the grant intermission is 0, there is continuous scheduling, and the UE can continuously detect the PDCCH; the 01 bit indicates that after receiving this DCI, the UE continues to detect after an interval of 2 slots; the 10 bit indicates that after receiving this DCI, the UE continues to detect after an interval of 5 slots; the 11 bit indicates that after receiving this DCI, the UE continues to detect after an interval of 10 slots. In addition, there is a certain probability of missed detection for the PDCCH channel. After missed detection, the UE does not know the grant intermission and will continuously detect.

[0059] Example:

[0060] Based on the above method, a specific example is proposed to illustrate the method in detail, as Figure 1 shown below:

[0061] gNB (5G base station, generation node B) side:

[0062] Step 1) MAC (Medium Access Control) scheduling; during the process of the 5G base station scheduling the uplink and downlink data of the UE, the scheduling frequency of a single UE will change dynamically according to the application program interaction of the scheduled user, the number of UEs in the system, the service traffic type, the scheduling strategy, the QoS (Quality of Service) performance, etc. At the same time, for the downlink, the base station side can clearly know the size of the data traffic, the traffic type, the bearer type, etc. sent by the core network; for the uplink, the base station side knows the size of the BSR (Buffer Status Report) value reported by the UE, the type of the LCG (Logical Channel Group), etc. Therefore, according to the scheduling strategy, while taking into account the QoS performance of each UE, the base station side can estimate the scheduling interval slot for a certain UE.

[0063] Step 2) DCI (Downlink Control Information) filling: After MAC scheduling is completed, DCI is filled next. After uplink scheduling is completed, uplink-related DCI (such as DCI0_0 or DCI0_1) will be filled, which includes filling the newly added uplink DCI field UL grant intermission (uplink grant interval). After downlink scheduling is completed, downlink-related DCI (such as DC1_0 or DCI1_1) will be filled, which includes filling the newly added downlink DCI field DL grant intermission (downlink grant interval). After filling is completed, it is sent to the physical layer.

[0064] Step 3) PDCCH (Physical Downlink Control Channel) processing: After the physical layer receives the DCI information, it performs channel processing at the bit level and symbol level on the DCI information. After processing is completed, it is finally mapped to the PDCCH channel and sent to the UE.

[0065] UE (User Equipment) side:

[0066] Step 4) PDCCH blind detection: Since the UE does not know the aggregation level and candidate set location used by the base station to send the PDCCH, the UE performs blind detection on the PDCCH.

[0067] Step 5) Parse DCI fields: After the UE performs blind detection on the PDCCH, it can parse the DCI bit stream and the information bits of each field.

[0068] Step 6) Obtain the scheduling grant interval: After the DCI fields are parsed, the UE can obtain the grant interval. For example, after parsing the uplink grant interval from DCI0_0 or DCI0_1, referring to Table 7.3.1.1.1-4 of Protocol 38.212 or Table 7.3.1.1.2-33 of Protocol 38.212, the uplink grant interval can be obtained. During this period, the UE will no longer listen to the uplink DCI in the PDCCH channel. Similarly, after parsing the downlink grant interval from DCI1_0 or DCI1_1, referring to Table 7.3.1.2.1-3 of Protocol 38.212 or Table 7.3.1.2.2-6 of Protocol 38.212, the downlink grant interval can be obtained. During this period, the UE will no longer listen to the downlink DCI in the PDCCH channel.

[0069] Generally, there is a certain probability of missed detection in the blind detection of the PDCCH channel by the UE. When the PDCCH is missed, the UE will not know the authorization interval and will continuously detect the PDCCH channel. Although this will lead to some ineffective blind detections at this time, the probability of missed detection of the PDCCH channel is usually low, so the resulting UE power overhead is small.

[0070] In a specific implementation, the present application provides a computer storage medium and a corresponding data processing unit. Among them, the computer storage medium can store a computer program, and when the computer program is executed by the data processing unit, it can run some or all of the steps in the summary of the invention and various embodiments of a user equipment energy-saving control method and a new radio (NR) system provided by the present invention. The storage medium can be a magnetic disk, an optical disc, a read-only memory (ROM), a random access memory (RAM), or the like.

[0071] Those skilled in the art can clearly understand that the technical solutions in the embodiments of the present invention can be implemented by means of a computer program and its corresponding general hardware platform. Based on such an understanding, the essence of the technical solutions in the embodiments of the present invention, or the part that contributes to the prior art, can be embodied in the form of a computer program, that is, a software product. The computer program software product can be stored in the storage medium and includes several instructions for causing a device including a data processing unit (which can be a personal computer, a server, a single-chip microcomputer, an MCU, or a network device, etc.) to execute the methods described in various embodiments or some parts of the embodiments of the present invention.

[0072] The present invention provides an idea and method for a user equipment energy-saving control method and a new radio (NR) system based on dynamic configuration information. There are many methods and ways to specifically implement this technical solution. The above is only the preferred implementation manner of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention. Each component not clearly defined in this embodiment can be implemented by the prior art.

Claims

1. A user equipment energy-saving control method based on dynamic configuration information, characterized in that The method includes the following steps: Step 1, redesign the downlink control information and add a flag bit for indicating the authorization interval; Step 2, during the process of the base station scheduling the uplink and downlink data of the user equipment, calculate the authorization interval of the user equipment; Step 3, set the corresponding flag bit in the downlink control information according to the authorization interval; Step 4, the user equipment monitors the physical downlink control channel. If no missed detection occurs, obtain the downlink control information, parse the added flag bit in Step 1 to obtain the authorization interval, and execute Step 5. Otherwise, repeat Step 4; Step 5, the user equipment suspends monitoring the physical downlink control channel according to the authorization interval obtained in Step 4 to achieve device energy saving.

2. The user equipment energy-saving control method based on dynamic configuration information according to claim 1, wherein The redesign of the downlink control information described in Step 1 includes: In the downlink control information defined in the original protocol, add flag bits for indicating the authorization interval, namely the uplink authorization interval field and the downlink authorization interval field, for transmitting the authorization interval.

3. The user equipment energy-saving control method based on dynamic configuration information according to claim 2, characterized in that, The uplink authorization interval field described in Step 1, that is, add an uplink authorization interval indication value in the DCI0_0 information and DCI0_1 information of 3GPP protocol 38.

212.

4. The user equipment energy-saving control method based on dynamic configuration information according to claim 3, characterized in that, The uplink authorization interval indication value is defined as follows: 00 indicates that the authorization interval is 0, that is, continuous monitoring without interruption; 01 indicates that the authorization interval is 2, that is, continuous monitoring after interrupting for 2 unit times; 10 indicates that the authorization interval is 5, that is, continuous monitoring after interrupting for 5 unit times; 11 indicates that the authorization interval is 10, that is, continuous monitoring after interrupting for 10 unit times.

5. The user equipment energy-saving control method based on dynamic configuration information according to claim 2, wherein, The downlink authorization interval field described in Step 1, that is, add a downlink authorization interval indication value in the DCI1_0 information and DCI1_1 information of 3GPP protocol 38.

212.

6. The user equipment energy-saving control method based on dynamic configuration information according to claim 5, characterized in that The downlink authorization interval indication value is defined as follows: 00 indicates that the authorization interval is 0, that is, continuous monitoring without interruption; 01 indicates that the authorization interval is 2, that is, continuous monitoring after interrupting for 2 unit times; 10 indicates that the authorization interval is 5, that is, continuous monitoring after interrupting for 5 unit times; 11 indicates that the authorization interval is 10, that is, continuous monitoring after interrupting for 10 unit times.

7. A user equipment energy-saving control method based on dynamic configuration information according to claim 2, characterized in that The calculation of the authorization interval of the user equipment described in Step 2 includes: During the process of the base station scheduling the uplink and downlink data of the user equipment, perform real-time calculation on the uplink authorization interval or downlink authorization interval of a single user equipment according to the application program interaction on the user equipment, the number of user equipments, the service traffic type, the scheduling strategy, and the QoS performance.

8. A user equipment energy-saving control method based on dynamic configuration information according to claim 7, characterized in that, The real-time calculation of the authorization interval of a single user equipment described in Step 2 specifically includes: For downlink data, the base station calculates the downlink authorization interval according to the size of the downlink data traffic, the traffic type, and the bearer type; For uplink data, the base station calculates the uplink authorization interval according to the size of the cache status report value reported by the user equipment and the type of the logical channel group.

9. A user equipment energy-saving control method based on dynamic configuration information according to claim 1, characterized in that The suspension of monitoring the physical downlink control channel described in Step 5 includes: If the uplink authorization interval is parsed from the DCI0_0 information or DCI0_1 information, during this authorization interval, the user equipment no longer monitors the uplink DCI information in the physical downlink control channel; After the downlink grant interval is parsed from the DCI1_0 information or the DCI1_1 information, during the grant interval, the user equipment no longer monitors the downlink DCI information in the PDCCH channel.

10. A new wireless NR system, characterized in that, The system adopts the method as described in any one of claims 1-9 for energy-saving control.

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