A method for adjusting user resident subbands in a wireless communication system

Abstract

The invention discloses a method for adjustment of a user residing sub-band in a wireless communication system. When a sub-band switching period comes, the steps are taken which includes a step A of adding first edge users residing in a user disabled sub-band in different cells to a first edge user list, selecting a target switching sub-band, a substitutive user and a target switching sub-band thereof for each user to be switched in the list, and adding each user and target switching sub-band information thereof to a switching sub-band information list; a step B of adding second edge users residing in the user disabled sub-band in different cells to a second edge user list, selecting a target switching sub-band, a substitutive user and a target switching sub-band thereof for each user to be switched in the list, and adding each user and target switching sub-band information thereof to the switching sub-band information list; and a step C of carrying out sub-band switching for all users in the switching sub-band information list sequentially according to the adding sequence of the users into the list. According to the invention, resources available to edge users can be increased, sub-band switching frequency of users is reduced, and performance of interference coordination is further improved.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method for adjusting user resident subbands in a wireless communication system. Background technique [0002] In the current narrowband communication system using OFDM technology, the licensed frequency points are discretely distributed, and the system divides the discrete frequency points into multiple subbands, that is, one frequency band contains multiple subbands. For authorized frequency points in the frequency band, users perform uplink and downlink data transmission on a single subband. In order to ensure the transmission delay of services and signaling, as well as the limitation of uplink scheduling request SR (SchedulingRequest) transmission resources, each subband has a maximum number of resident users. When the number of resident users in a subband reaches the upper limit, the subband is called a non-idle subband, otherwise it is called an idl...

AI Technical Summary

Problems solved by technology

[0014] The existing subband switching process is to adjust the center user first, and then adjust the first type of edge user and the second type of edge user. The adjustment method for the first type of edge user and the second type of edge user is the same, because the second type of edge user Users can be scheduled in the edge frequency band of the cell, and can also be scheduled in the center frequency band of the 1 / 3 frequency band of the cell. Therefore, in step 1, the resident subband of the central user is first adjusted, that is, when the resident user of the edge subband When the number exceeds the pre-saturation threshold, switching the center users residing on the edge sub-band to the center sub-band may cause the center users to preferentially reside on the center sub-band and preempt the available center sub-band of the second type of edge users. The resources of the second type of edge users cannot ensure that the second type of edge users are preferentially adjusted to their available central subbands, so that the available resources of the second type of edge users cannot be increased, resulting in an increase in the number of subband switching times for users

[0015] In addition, in step 2, when adjusting the resident subbands of edge users, the edge subbands are only used as the switching target subbands of the first type of edge users and the second type of edge users, and the center subbands available to the second type of edge users are not used. As the target switching subband of the second type of edge users, it is impossible to make the second type of edge users reside on its available central subband, and it is impossible to increase the available resources of the second type of edge users, resulting in the number of subband switching of users Increase

[0016] Therefore, according to the existing subband switching process, when the user's resident subband is adjusted, the available resources of the second type of edge users cannot be increased, which is not conducive to reducing the number of subband switching times of the user, resulting in switching subbands during user scheduling. The delay and control signaling overhead are too large

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