E-RAB List Transmission for Energy Saving in LTE
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Solution Overview
Problem
Current wireless communication systems face challenges in energy saving, particularly in non-overlapping scenarios where cell switching off can impact Quality of Service (QoS) for users and lack effective solutions for inter-eNB energy saving, especially in LTE networks.
Innovation Solution
A method for transmitting a list of minimum required or required E-UTRAN radio access bearers (E-RABs) between eNodeBs in a wireless communication system, where an energy saving cell configures and transmits a list of E-RABs to a compensation cell, and the compensation cell checks its ability to support these bearers before the energy saving cell can be turned off, ensuring continuous coverage and QoS.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If an energy saving cell is turned off to reduce energy consumption, then energy efficiency is improved, but Quality of Service (QoS) for users may be degraded
Solution Approach 1:
The patent applies preliminary action by having the energy saving cell transmit a list of required E-RABs to the compensation cell before turning off the energy saving cell. This allows the compensation cell to pre-prepare and verify its ability to support all necessary bearers, ensuring QoS continuity without service interruption when the energy saving cell is deactivated.
2Loss of energy
If cell switching off is implemented in non-overlapping scenarios, then energy saving is achieved, but continuous coverage cannot be guaranteed
Solution Approach 1:
The patent uses the list of required E-RABs as an intermediary mechanism between the energy saving cell and compensation cell. This list serves as a verification tool that enables the compensation cell to confirm it can maintain continuous coverage for all user bearers before the energy saving cell is switched off, thus guaranteeing continuous coverage in non-overlapping scenarios.
3Reliability
If a list of required E-RABs is transmitted and verified before cell shutdown, then QoS continuity is ensured, but signaling overhead and procedure complexity increase
Solution Approach 1:
The patent applies universality by utilizing existing E-RAB configuration and verification mechanisms already present in LTE networks. The list of required E-RABs leverages existing signaling structures and procedures, allowing the system to verify QoS continuity without introducing entirely new complex protocols or procedures.
Data Source
AI summary
A method and apparatus for transmitting a list of bearers in a wireless communication system is provided. A first eNodeB (eNB) of an energy saving cell configures a list of minimum required evolved-UMTS terrestrial radio access network (E-UTRAN) radio access bearers (E-RABs) or required E-RABs, and transmits the configured list of minimum required E-RABs or a required E-RABs to a second eNB of a compensation cell. Upon receiving the configured list of minimum required E-RABs, the second eNB checks whether the compensation cell is able to provide all E-RABs included in the list of minimum required E-RABs or not. Upon receiving the configured list of required E-RABs, the second eNB checks whether the compensation cell is able to provide E-RABs included in the list of required E-RABs or not.