US 12,238,048 B2
Radio frame configuration for dynamic coordinated TDD
Ali Esswie, Aalborg (DK); and Klaus Ingemann Pedersen, Aalborg (DK)
Assigned to Nokia Technologies Oy, Espoo (FI)
Appl. No. 17/250,798
Filed by NOKIA TECHNOLOGIES OY, Espoo (FI)
PCT Filed Oct. 11, 2018, PCT No. PCT/EP2018/077697
§ 371(c)(1), (2) Date Mar. 4, 2021,
PCT Pub. No. WO2020/074079, PCT Pub. Date Apr. 16, 2020.
Prior Publication US 2021/0351904 A1, Nov. 11, 2021
Int. Cl. H04L 5/22 (2006.01); H04W 24/02 (2009.01); H04W 72/0446 (2023.01); H04W 72/27 (2023.01)
CPC H04L 5/22 (2013.01) [H04W 24/02 (2013.01); H04W 72/0446 (2013.01); H04W 72/27 (2023.01)] 10 Claims
OG exemplary drawing
 
1. A master base station of a mobile communication system, the master base station comprising at least one processor and at least one memory including computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the master base station at least to:
receive, from each slave base station of a plurality of slave base stations of the mobile communication system, which belong to a cluster of the master base station, a request to use a radio frame configuration determined by the slave base stations for communicating with user equipments,
wherein the determined radio frame configuration is indicated in the request and is one of Q unique radio frame configurations included in a predefined sliding codebook, where Q has a value greater than 1,
wherein each of the Q unique radio frame configurations comprises subframes for downlink communication with the user equipments and subframes for uplink communication with the user equipments, and
wherein the predefined sliding codebook comprises sub-codebooks each grouping together radio frame configurations of the Q unique radio frame configurations, that share the same downlink-to-uplink subframe ratio but with a phase offset of the radio frame configurations;
identify a common sub-codebook out of the sub-codebooks, that comprises most of the determined radio frame configurations indicated in the requests received from the plurality of slave base stations; and
for each of the determined radio frame configurations indicated in the requests received from the plurality of slave base stations,
select, as a response to the request from each slave base station of the plurality of slave base stations, a radio frame configuration out of the Q unique radio frame configurations, that corresponds to a sub-codebook of the determined radio frame configuration and minimizes an average misalignment with a radio frame configuration of the common sub-codebook.