Dynamic Time Resource Allocation for eMTC Wireless Systems
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Solution Overview
Problem
There is a need for a method to efficiently allocate resources for both broadband LTE and narrow band eMTC communication in a 5G wireless communication system, particularly to support low-cost, low-complexity eMTC UEs with limited bandwidth, which face challenges in coverage enhancement and data transmission due to their narrower frequency band compared to conventional LTE UEs.
Innovation Solution
A dynamic resource allocation method where a base station schedules time resources for downlink and uplink physical control channels, allowing the end time point of the downlink data transmission to be adjusted based on data amount, and divides physical channel resources into downlink-exclusive and uplink-exclusive areas to ensure efficient use of resources, enabling cooperative scheduling between DL and UL schedulers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If eMTC UEs use narrow band communication with limited bandwidth, then device cost and complexity are reduced, but coverage and data transmission capability deteriorate
Solution Approach 1:
The patent implements dynamic resource allocation where the base station adjusts time resource allocation for downlink and uplink based on traffic conditions. The DL/UL scheduler dynamically determines the end time point of downlink data transmission and allocates uplink resources accordingly, allowing the system to adapt to varying data amounts and improve coverage for narrowband eMTC UEs without increasing device complexity
Solution Approach 2:
The patent changes the parameter of time resource allocation by adjusting the end time point of downlink physical data channel based on the amount of downlink data. This dynamic parameter adjustment optimizes resource utilization and improves coverage for eMTC UEs with limited bandwidth, resolving the contradiction between device simplicity and communication reliability
2Ease of operation
If fixed time resource allocation is used for downlink and uplink, then scheduling simplicity is improved, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent transitions from fixed to dynamic time resource allocation. The base station's DL/UL scheduler dynamically adjusts the end time point of downlink data transmission based on the actual amount of downlink data, and accordingly allocates uplink time resources. This dynamic approach maintains scheduling simplicity while significantly improving resource utilization efficiency by preventing both resource wastage and transmission delays
Solution Approach 2:
The patent implements a feedback mechanism where the base station monitors the amount of downlink data and uses this information to adjust the end time point of downlink physical data channel and subsequent uplink resource allocation. This feedback-based dynamic adjustment resolves the contradiction between scheduling simplicity and resource utilization efficiency
3Quantity of substance
If downlink data transmission time is extended to accommodate large data amounts, then data transmission completeness is improved, but uplink transmission timing is delayed
Solution Approach 1:
The patent implements dynamic time resource allocation where the end time point of downlink data transmission is adjusted based on the actual amount of downlink data. The DL/UL scheduler dynamically determines when downlink transmission ends and immediately allocates subsequent time resources for uplink transmission, ensuring that uplink timing is optimized based on actual downlink data requirements rather than using fixed allocation
Solution Approach 2:
The patent applies preliminary action by having the base station pre-allocate uplink time resources based on the expected downlink data amount. The DL/UL scheduler determines the end time point of downlink physical data channel in advance and pre-configures the corresponding uplink resource allocation, allowing uplink transmission to occur at the optimal time without delay
Data Source
AI summary
Disclosed is a method of allocating time resources of a downlink (DL) physical control channel, including scheduling transmission of DL data in a first time resource, and scheduling transmission of uplink (UL) data in a second time resource starting after the first time resource ends, wherein an end time point of the first time resource is changed based on an amount of the DL data and is less than or equal to a first maximum value.