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Selecting a modulation and coding scheme and a transmit block size in long term evolution

A technology of modulation and coding scheme and block size, which is applied in the direction of adjusting channel coding, adjusting transmission rate, transmission system, etc., and can solve problems such as inefficiency, inefficient link adaptation, and inefficient resource usage

Pending Publication Date: 2020-11-24
COMMSCOPE TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This can lead to inefficient link adaptation, e.g. choosing an MCS and / or TBS that do not match well the conditions of the wireless channel
Inefficient link adaptation results in poor throughput and inefficient resource usage

Method used

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  • Selecting a modulation and coding scheme and a transmit block size in long term evolution
  • Selecting a modulation and coding scheme and a transmit block size in long term evolution
  • Selecting a modulation and coding scheme and a transmit block size in long term evolution

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0128] Example 1 includes a base station for selecting a modulation coding scheme (MCS) and a total block size (TBS) for a user equipment (UE), comprising: a processor; a memory in electronic communication with the processor; and stored in the memory instructions executable to: map a nominal modulation coding scheme (MCS) to a total block size (TBS) index; determine a nominal TBS value for each resource block based on the TBS index; The target TBS is determined by the nominal TBS value of resource blocks and the number of resource blocks allocated to the UE; the custom TBS closest to the target TBS is determined from a plurality of predefined TBS; the custom TBS is mapped to the custom TBS MCS; and transmitting to the UE during a downlink transmission time interval (TTI) using the customized TBS and the customized MCS.

[0129] Example 2 includes the base station of Example 1, wherein the instructions executable to determine the target TBS include instructions executable to: m...

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PUM

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Abstract

A base station for selecting a modulation and coding scheme (MCS) and a total block size (TBS) for a UE is provided. The base station includes a processor and memory storing instructions. The instructions are executable to map a nominal MCS to a TBS index and determine a nominal TBS per resource block value based on the TBS index. The instructions are also executable to determine a target TBS based on the nominal TBS per resource block value and a number of resource blocks allocated to the UE. The instructions are also executable to determine a customized TBS, from a plurality of predefined TBSs, that is closest to the target TBS. The instructions are also executable to map the customized TBS to a customized MCS. The instructions are also executable to use the customized TBS and the customized MCS to transmit to the UE during a downlink transmission time interval.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to the following patent application, which is hereby incorporated by reference: U.S. Provisional Patent, entitled "Selection of Modulation Coding Scheme and Transport Block Size in Long Term Evolution," filed April 18, 2018 Application Serial No. 62 / 659,634. Background technique [0003] Due to the explosive growth of mobile broadband services and the consequent shortage of limited spectrum resources, the Federal Communications Commission has adopted the 3550-3700MHz (3.5GHz) frequency band (for licensed and unlicensed use of the 3.5GHz frequency band) The rules governing the shared use of 150MHz of spectrum in commercial use for a variety of services. [0004] Citizens Broadband Radio Service (CBRS) is a 3.5GHz commercial radio service in the United States. The CBRS system may be used for Long Term Evolution (LTE) services. In the United States, a CBRS system may use Time Division Dup...

Claims

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Application Information

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IPC IPC(8): H04L1/00H04L5/00H04L5/14H04W72/04
CPCH04L1/1893H04L5/0053H04L5/0044H04L5/0078H04L1/0003H04L1/0016H04L1/0009H04L5/14H04W72/0446
Inventor S·D·桑德伯格
Owner COMMSCOPE TECH LLC