EGPRS Packet Channel Request One-Phase Access
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, particularly in EGPRS, it is challenging to indicate support for EGPRS2 and latency reduction features (LATRED) during one-phase access, which forces two-phase access, preventing the use of these features in the uplink and limiting the ability to convey mobile station multi-slot class information efficiently.
Innovation Solution
Modifying the EGPRS Packet Channel Request message to include cause values and training sequences that allow indication of EGPRS2 and LATRED capabilities, enabling one-phase access by using unused bits and introducing a multi-slot hyper class field to signal transmit capabilities, while ensuring compatibility with existing standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If one-phase access is used in EGPRS, then access speed and efficiency are improved, but the ability to indicate EGPRS2 and LATRED capabilities is lost
Solution Approach 1:
The patent combines multiple functions into the Packet Channel Request message: it simultaneously indicates access type (one-phase or two-phase), EGPRS2 capability, LATRED capability, and multi-slot class information, all in a single message transmission, eliminating the need for separate capability indication messages
Solution Approach 2:
The patent performs capability indication in advance during the initial Packet Channel Request message, so that the network can allocate appropriate resources and apply correct processing before actual data transmission begins, avoiding later re-negotiation
2Loss of information
If two-phase access is used to indicate EGPRS2 and LATRED support, then capability indication is achieved, but access latency increases
Solution Approach 1:
The patent merges capability indication with the access request itself by embedding EGPRS2 and LATRED capability bits directly in the Packet Channel Request message, allowing the network to recognize and handle these capabilities in the first phase without requiring a second phase for capability exchange
3Adaptability or versatility
If existing EGPRS Packet Channel Request message format is used, then compatibility is maintained, but new capabilities (EGPRS2, LATRED) cannot be indicated
Solution Approach 1:
The patent changes the parameters of the existing message format by reusing available bit fields (cause values and training sequence indicators) to encode new capability information, rather than adding new message types or significantly expanding the message structure
Solution Approach 2:
The patent makes the Packet Channel Request message universal by enabling it to serve multiple functions: indicating access type, EGPRS capability, EGPRS2 capability, LATRED capability, and multi-slot class, all through a single message format that works across different capability scenarios
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
An apparatus in accordance with a system and method for one -phase access in a communication system. In one embodiment, the apparatus includes a processor 310 configured to create a packet channel request message enabling one -phase access including an indication of a latency reduction capability thereof. The apparatus also includes a transceiver 330 configured to transmit the packet channel request message.