LTE Resource Block Allocation for Mixed Transmission Modes

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Solution Overview

Problem

In LTE systems, mixing Localized transmission and Distributed transmission in the same sub-frame leads to complexity in the receiving process, increased circuit size, and process delays, as well as a lack of flexibility in resource allocation, especially when Sub-sampling transmission is involved.

Innovation Solution

A communication method that selects transmission types based on terminal traveling speed, determines the number of aggregation, generates individual bit maps for Localized transmission, and allocates resource blocks dynamically to simplify the receiving process and enhance resource allocation flexibility by defining resource block numbers for Distributed transmission as fixed values and using a resource-number mapping rule.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If Localized transmission and Distributed transmission are mixed in the same sub-frame, then resource allocation flexibility is improved, but receiving process complexity increases

Engineering Contradiction:

Improveresource allocation flexibilityVSAvoidreceiving process complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent segments the system frequency band into multiple resource block groups, where each group can be independently allocated to different terminals using different transmission types (Localized or Distributed). This segmentation allows the receiver to process each group separately according to its transmission type, reducing overall receiving complexity while maintaining allocation flexibility.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies different transmission qualities to different parts of the frequency band by allowing Localized transmission for some resource block groups and Distributed transmission for others within the same sub-frame. Each terminal receives allocation information specific to its assigned groups, enabling localized optimization without requiring the receiver to handle all possible transmission types simultaneously across the entire band.

Inventive Principle:

Principle #3Local quality

2Adaptability or versatility

If Localized transmission and Distributed transmission are mixed in the same sub-frame, then resource allocation flexibility is improved, but circuit size increases

Engineering Contradiction:

Improveresource allocation flexibilityVSAvoidcircuit size

Core Design Contradiction:

Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

By segmenting resource blocks into distinct groups and assigning specific transmission types to each group, the patent reduces the circuit size required at the receiver. The receiver only needs to implement processing for the transmission types applicable to its allocated groups, rather than maintaining full capability for all transmission types across the entire frequency band.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements partial action by allowing terminals to receive only the subset of transmission types relevant to their allocated resource block groups. This partial implementation reduces hardware requirements while maintaining the flexibility benefits of mixed transmission modes in the overall system.

Inventive Principle:

Principle #16Partial or excessive action

3Adaptability or versatility

If Localized transmission and Distributed transmission are mixed in the same sub-frame, then resource allocation flexibility is improved, but process delay increases

Engineering Contradiction:

Improveresource allocation flexibilityVSAvoidprocess delay

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The patent applies preliminary action by pre-defining resource block groups and their associated transmission types before actual data transmission. Allocation information including transmission type indicators is prepared in advance and transmitted to terminals before data transmission begins, allowing terminals to pre-configure their receiving processes and reduce processing delays during actual data reception.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

By segmenting the frequency band into resource block groups with predetermined transmission types, the patent enables terminals to quickly identify and process only the relevant segments without analyzing the entire frequency band. This segmentation reduces the time required for channel quality measurement, report generation, and resource allocation decision-making.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentEP3125451B1Wireless communication transmitter and receiver

Publication Date: 2017.08.16 MITSUBISHI ELECTRIC CORP

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AI summary

In a wireless communication system where data transmission is performed between a base station and terminals, the base station individually generates, for each terminal, a bit map indicative of scheduling resource numbers to be allocated to terminals to which Localized transmission is applied, based on a resource-number mapping rule defined by providing individual resource block numbers to all resource blocks, taking resource block numbers of resource blocks for Distributed transmission as fixed values, and providing individual scheduling resource numbers to remaining resource blocks for Localized transmission except the resource blocks for Distributed transmission for each of scheduling resources corresponding to the number of aggregation.