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CN-122028186-A - Multi-user resource scheduling method based on degradation mechanism

CN122028186ACN 122028186 ACN122028186 ACN 122028186ACN-122028186-A

Abstract

The invention discloses a multi-user resource scheduling method based on a degradation mechanism, which comprises a UE grouping method, a transmission sequence table generating method, a degradation control flow and the like, provides rich configuration options and can be flexibly selected. By adjusting parameters of the triggering condition and the degradation condition, the method can adapt to different network requirements and UE characteristics, allows the network to flexibly allocate resources according to the actual requirements and conditions of the UE, and realizes optimization of overall performance. According to the scheme, by maintaining and managing the time slot transmission direction sequence table of the degraded UE, part of the UE is degraded to a half-duplex resource allocation mode under specific conditions, and resources are allocated according to the unified time slot transmission direction, so that CLI interference between the half-duplex UE is effectively reduced, flexible utilization of network resources is ensured through a reasonable degradation mechanism, and a method for balancing signaling overhead, computing power overhead, resource allocation optimization and interference suppression is provided for a full-duplex system.

Inventors

  • XU JIN
  • WANG TAO
  • LIU JUNLONG
  • TAO XIAOFENG

Assignees

  • 北京邮电大学

Dates

Publication Date
20260512
Application Date
20260116

Claims (10)

  1. 1. The multi-user resource scheduling method based on the degradation mechanism is characterized by comprising the following steps: s1, a base station acquires UE CLI interference information, UE speed information and UE position information; S2, the base station executes a classification algorithm for each UE according to the information acquired in the step S1 by combining a preset CLI classification threshold, a preset speed classification threshold and a preset distance classification threshold; S3, the base station counts the number of occupied resources and the number of idle resources in a period of time, calculates the resource utilization rate RU, and calculates the actual packet number K by combining the preset maximum packet number M and minimum packet number M in a calculation mode of , Representing a downward rounding; s4, the base station executes a grouping algorithm on the UE in the degradation candidate UE set according to the grouping number K acquired in the step S3 by combining a preset CLI grouping threshold value and a preset distance grouping threshold value; S5, aiming at K groups obtained in the step S4, the base station respectively counts the uplink and downlink flow proportion and speed distribution of all UE in each group in a period of time, and generates a transmission direction sequence table for each group, wherein the total number of the K groups is K; S6, the base station respectively sends corresponding degradation control configuration to each UE in the degradation candidate UE set, each UE determines whether to execute the degradation control flow according to the received degradation control configuration, if so, the corresponding degradation reference mark is reported, and if not, the degradation control flow is exited; And S7, the base station identifies whether the UE is in a degradation state or not according to degradation control identifications reported by all the UEs in the received degradation candidate UE set, and executes different resource scheduling strategies for the UEs in the degradation state and the non-degradation state respectively.
  2. 2. The method for scheduling multi-user resources based on degradation mechanism as claimed in claim 1, wherein in step S1, the manner in which the base station obtains the CLI interference information of the UE includes: The measurement feedback mode 1 specifically comprises the steps that (1) a base station sends CLI-RSSI measurement configuration to a target UE, (2) the target UE measures total received power on a specified frequency band resource and feeds back a measurement result CLI-RSSI to the base station, (3) the base station takes the CLI-RSSI reported by the target UE as the total interference power of the specific UE by surrounding UE; The measurement feedback mode 2 specifically comprises the steps of (1) respectively issuing SRS-RSRP measurement configuration to target UE and SRS signal transmission configuration to interference source UE by a base station, (2) sending SRS signals by the interference source UE according to the configuration, synchronously measuring the RSRP value of the signals by the target UE and reporting the RSRP value to the base station by the target UE, (3) calculating interference power between the two base stations according to the reporting result by the base station, and (4) repeatedly measuring a plurality of interference source UE and accumulating to obtain the total interference power received by the target UE.
  3. 3. The method for scheduling multi-user resources based on a degradation mechanism according to claim 1, wherein in step S1, the base station obtains the UE speed information by estimating the user movement speed according to the doppler shift characteristic of the signal, or estimating the movement direction and speed according to the position change of the UE, or indicating the UE to report the GPS data, and calculating the movement speed of the UE through the position information change of the GPS data in a specific time period.
  4. 4. The method of scheduling multi-user resources based on a degradation mechanism according to claim 1, wherein in step S2, the base station obtains the UE location information by measuring the signal propagation delay sent by the UE, and determining the UE location by the base station, or estimating the distance and the azimuth of the UE relative to the base station by the base station according to the signal arrival angle sent by the UE, or indicating the UE to report the GPS location information by the base station.
  5. 5. The method for scheduling multi-user resources based on degradation mechanism according to claim 1, wherein in step S2, the base station performs the following procedure of the classification algorithm: (1) Comparing the CLI interference intensity of the UE with a CLI classification threshold, if the CLI interference intensity of the UE is larger than the CLI classification threshold, classifying the UE into a degradation candidate UE set, otherwise, performing the next step; (2) Comparing the UE speed with a speed classification threshold, if the UE speed is greater than the speed classification threshold, classifying the UE into a degradation candidate UE set, otherwise, performing the next step; (3) And comparing the minimum distance between the UE and other UEs with a distance classification threshold, if the minimum distance between the UE and other UEs is smaller than the distance classification threshold, classifying the UE into a degradation candidate UE set, otherwise classifying the UE into a non-degradation candidate UE set.
  6. 6. The method for scheduling multi-user resources based on degradation mechanism according to claim 1, wherein in step S4, the flow of the base station executing the grouping algorithm is as follows: (1) Initializing groups, namely creating K empty groups, and marking the K empty groups as groups 1 to K; (2) Traversing each UE in the set of degenerate candidate UEs: (i) Checking the existing non-empty groups in sequence for the current UE, and if at least one UE in the groups meets the conditions that the CLI of the current UE is larger than a CLI grouping threshold and the distance between the current UE and the current UE is smaller than a distance grouping threshold, adding the current UE into the groups and entering the next UE processing; (ii) If all the existing non-empty groups do not meet the conditions, further checking the following conditions that (a) if the unused empty groups still exist, the current number of the non-empty groups is less than K, the current UE is added into one empty group; (3) After all UE traverses are completed, K groups are obtained.
  7. 7. The method for multiuser resource scheduling based on the degradation mechanism according to claim 1, wherein in step S5, the rule for generating the transmission direction sequence table is as follows: (1) Determining the corresponding time length of the sequence table according to the preset statistical time length, and marking the time length as T subframes/time slots; (2) Preliminarily determining the uplink-downlink proportion of the sequence table, wherein the uplink time length Upstream traffic/downstream traffic , Represents an upward rounding, the downward time length td=t-Tu; (3) Generating initial uplink and downlink transmission arrangement according to Tu and Td, wherein the first Tu time slots are uplink and the last Td time slots are downlink; (4) Comparing the speed of each UE in the group with a preset high-speed judging threshold value, if the UE with the speed larger than the high-speed judging threshold value exists in the group, dividing the initial uplink and downlink transmission arrangement into N continuous subsections according to a preset sequence table separation number N, wherein the length of each subsection is T/N, the front Tu/N time slots in each subsection are set to be uplink, and the rear Td/N time slots are set to be downlink, so that an even staggered uplink and downlink transmission structure is formed.
  8. 8. The method of claim 1, wherein in step S6, the degradation control identifier is represented by 1bit information, "1" indicates that the UE enters the degradation control flow and needs to include the subsequent degradation control parameter, "0" indicates that the UE exits the degradation control flow and does not need to include the subsequent degradation control parameter; Degradation control parameters represented by 4bit information, including (i) degradation conditions including one or more of "CQI is smaller than CQI degradation threshold" and "CLI-RSSI is larger than CLI-RSSI degradation threshold", each degradation condition being indicated by 1bit information whether to enable or not, "1" represents to enable and "0" represents to not enable, (ii) degradation reference identification reporting period being represented by 2bit information, "00", "01", "10", "11" respectively corresponding to reporting periods of 20ms, 80ms, 160ms and 320 ms; When the degradation control parameter includes a degradation condition that the CLI-RSSI is greater than the CLI-RSSI degradation threshold, the base station additionally transmits parameter configuration required for performing the CLI-RSSI measurement in step 1 to the UE, including measurement resources and measurement modes.
  9. 9. The method for scheduling multi-user resources based on degradation mechanism according to claim 1, wherein in step S6, the UE performs a degradation control procedure according to the received degradation control configuration as follows: (1) When the degradation condition comprises that the CLI-RSSI is greater than the CLI-RSSI degradation threshold value, the UE performs CLI-RSSI measurement according to the CLI-RSSI measurement configuration and compares the CLI-RSSI degradation threshold value with the preset CLI-RSSI degradation threshold value to judge whether the degradation condition is met; (2) When the UE judges that the degradation condition is met, periodically reporting a degradation reference mark '1' to the base station according to a degradation reference mark reporting period in the degradation control parameter; and when the degradation condition is not met, periodically reporting a degradation reference mark '0' to the base station.
  10. 10. The method for scheduling multi-user resources based on degradation mechanism as claimed in claim 1, wherein in step S7, the base station identifies whether the UE is in a degraded state and the corresponding resource scheduling procedure is as follows: (1) When the UE initiates an uplink/downlink transmission request, the base station waits for the next available uplink/downlink time slot in a transmission direction sequence table corresponding to the packet where the UE is positioned, and allocates uplink/downlink transmission resources for the next available uplink/downlink time slot; (2) For the UE with the degradation reference mark of 0 and the UE in the non-degradation candidate UE set, the base station recognizes that the UE is in a non-degradation state, normally responds to the uplink/downlink transmission request of the UE, and when the UE initiates the uplink/downlink transmission request, the UE immediately allocates transmission resources in the earliest available uplink/downlink time slot according to a conventional scheduling strategy.

Description

Multi-user resource scheduling method based on degradation mechanism Technical Field The invention relates to the technical field of wireless communication, in particular to a multi-user resource scheduling method based on a degradation mechanism. Background The continued development of wireless communication networks places higher demands on spectral efficiency. Meanwhile, the Co-time Co-frequency Full Duplex (CCFD) technology is used as an innovative technology breaking through the use limit of the traditional frequency spectrum, and allows a base station to simultaneously transmit uplink data and downlink data on the same time-frequency resource, so that the frequency spectrum efficiency is remarkably improved. The interference problem faced by simultaneous co-frequency full duplex systems is more severe than with sub-band full duplex (Subband Full Duplex, SBFD), where Cross-link interference (Cross-LINK INTERFERENCE, CLI) of users can significantly affect the communication quality of the users. In order to suppress inter-user CLI, the existing scheme mostly reduces inter-user interference through accurate CLI measurement reporting and time-frequency resource optimized scheduling of a base station. However, this approach presents challenges to the base station's ability to handle a large number of interfering links simultaneously and to coordinate scheduling. Specifically, as the number of users in the network increases and the system load increases, the number of interfering links that the base station needs to process increases exponentially, which complicates and takes time accurate CLI measurements, and the amount of data reported increases rapidly, possibly resulting in signaling congestion. Meanwhile, when the base station performs time-frequency resource optimization scheduling, resources are required to be accurately allocated to each user, and the resources are dynamically adjusted to avoid interference, so that the calculation complexity of the base station is greatly increased. When the number of User Equipment (UE) is large, the system load is high, and the interference is complex and changeable, the challenge to the processing capability and the scheduling accuracy of the base station is that the effect of the interference suppression strategy which simply depends on the multi-User resource scheduling is rapidly reduced. At this time, the system performance may be drastically deteriorated, and even in an extreme case, since interference cannot be effectively controlled, the actual capacity provided by the full duplex system may be lower than that of the conventional half duplex system, which is contrary to the original purpose of introducing the full duplex technology to improve the spectrum efficiency, and severely restricts the actual deployment of the full duplex technology and the exertion of the performance advantages. Disclosure of Invention Aiming at the defects existing in the prior art, the invention provides a multi-user resource scheduling method based on a degradation mechanism. The method allows the base station to decide whether to start a degradation mechanism based on UE decision according to the network state, thereby realizing a differential resource allocation strategy. When the network condition is better, the system adopts a full duplex resource allocation mode to all users to improve the spectrum efficiency, and when the network condition is worsened or the system load is too high, the system degenerates partial users into a half duplex resource allocation mode, so that the cross link interference among the users is reduced, and the system capacity is kept. The scheme reduces the measurement overhead and the scheduling complexity under the conditions of multiple users, high load and complex interference while ensuring the communication stability and the reliability, can better exert the full duplex technical advantage, and is suitable for a multi-base station multi-user networking scene. In order to achieve the above object, the present invention provides the following technical solutions: A multi-user resource scheduling method based on a degradation mechanism comprises the following steps: s1, a base station acquires UE CLI interference information, UE speed information and UE position information; S2, the base station executes a classification algorithm for each UE according to the information acquired in the step S1 by combining a preset CLI classification threshold, a preset speed classification threshold and a preset distance classification threshold; S3, the base station counts the number of occupied resources and the number of idle resources in a period of time, calculates the resource utilization rate RU, and calculates the actual packet number K by combining the preset maximum packet number M and minimum packet number M in a calculation mode of ,Representing a downward rounding; s4, the base station executes a grouping algorithm on the UE in the degradation ca