Relay Node Startup Phase Indicator for Gateway Selection
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Solution Overview
Problem
The existing methods for selecting Serving Gateway (SGW) and Packet Data Gateway (PGW) for a Relay Node (RN) in the startup procedure are inefficient, leading to increased startup time and potential errors when the MME selects legacy SGW/PGW, causing the RN to repeat phases and fail to enter normal operation.
Innovation Solution
The RN transmits a startup phase indicator to the eNB or MME, allowing the MME to determine the current startup phase and select appropriate gateway nodes accordingly, either legacy SGW/PGW for Phase I or Donor eNB as SGW/PGW for Phase II, ensuring proper gateway node selection based on the phase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the MME selects gateway nodes using existing methods without phase information, then the selection process is simple, but the RN startup time increases and phase repetition errors occur
Solution Approach 1:
The RN determines and transmits the startup phase indicator before the MME performs gateway node selection. This preliminary action provides the MME with necessary phase information in advance, enabling correct gateway node selection (legacy SGW/PGW for Phase I, DeNB for Phase II) and preventing phase repetition errors, thus reducing RN startup time
Solution Approach 2:
The startup phase indicator acts as an intermediary information element that bridges the RN and MME. It carries critical phase information from the RN to the MME, enabling the MME to make informed gateway node selection decisions without complex internal analysis, thereby streamlining the selection process while reducing startup time
2Productivity
If the MME selects appropriate gateway nodes based on phase information, then the RN startup efficiency improves, but the signaling overhead increases
Solution Approach 1:
Instead of transmitting complete phase description information, the RN transmits only a compact startup phase indicator (partial information) that is sufficient for the MME to make correct gateway node selection decisions. This reduces signaling overhead while maintaining RN startup efficiency
Solution Approach 2:
The patent transforms complex phase information into a simplified parameter (startup phase indicator) that can be efficiently transmitted. By changing the information representation from detailed phase descriptions to a compact indicator, the signaling overhead is reduced while preserving the essential information needed for efficient gateway node selection
Data Source
AI summary
Disclosed are a method, a system, and a device for transmitting a startup phase indicator and gateway node selection, relating to the technical field of wireless communications, for use in solving the problem in the prior art of the manner of selecting gateway nodes for a relay node (RN) by a mobility management entity (MME). In the present invention, during an attach process between the RN and the MME, the MME confirming whether or not a piece of information indicating the startup phase which the RN is currently performing is received, if yes, then on the basis of the information, confirming the startup phase which the RN is currently performing, if not, on the basis of a preconfigured rule of judging the startup phase of the RN, confirming the startup phase which the RN is currently performing; selecting the gateway nodes for the RN on the basis of the startup phase which the RN is currently performing. Employment of the present invention allows the MME to select the appropriate gateway node for the RN on the basis of the startup phase which the RN is currently performing.