Wireless Protocol Stack Segmentation for PDCP-Free Low-Power Devices
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Solution Overview
Problem
Devices with relatively weak capabilities face high communication complexity due to the need to perform functions of various protocol layers in a conventional protocol stack, which exceeds their capability to match the complexity, particularly in zero-power and ambient-energy-based devices.
Innovation Solution
The protocol stack of these devices does not include a Packet Data Convergence Protocol (PDCP) layer, reducing complexity by omitting or modifying layers such as MAC or RRC, and instead incorporating a physical layer and other simplified layers for control and user planes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a conventional protocol stack with PDCP layer is used, then communication functionality is complete, but device complexity becomes too high for weak capability devices
Solution Approach 1:
The patent extracts and removes the PDCP layer from the protocol stack of terminal devices with weak capabilities. This extraction simplifies the protocol stack by eliminating the packet data convergence protocol layer, reducing processing complexity while maintaining essential communication functionality through alternative simplified protocols.
Solution Approach 2:
The patent segments the protocol stack into different configurations based on device capability. Terminal devices are divided into those with strong capabilities (full protocol stack including PDCP) and those with weak capabilities (simplified protocol stack without PDCP), allowing each segment to operate with appropriate complexity level.
2Use of energy by moving object
If all protocol layer functions are implemented, then communication reliability is ensured, but energy consumption exceeds capability of zero-power devices
Solution Approach 1:
The patent extracts energy-intensive protocol layer functions (specifically PDCP layer operations) from the communication protocol. By removing this layer from terminal devices with weak or zero power capabilities, the system reduces energy consumption while maintaining communication reliability through alternative mechanisms at lower protocol layers.
Solution Approach 2:
The patent applies partial action by implementing only the essential protocol functions needed for basic communication, omitting optional or excessive functions (such as PDCP layer packet convergence and data compression) that consume additional energy but are not critical for fundamental communication operations.
Data Source
AI summary
Provided are a wireless communication method and a communications apparatus. The method comprises: a first device sends first information to a second device, wherein a protocol stack of the first device does not comprise a packet data convergence protocol (PDCP) layer. In embodiments of the present application, a PDCP layer is no longer configured in the protocol stack of the first device.