PoC Client Invitation Reservation for Seamless Group Entry
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Solution Overview
Problem
In Push-to-talk over Cellular (PoC) systems, clients face difficulties participating in chat PoC groups due to exceeded number limits or non-initiated sessions, leading to deteriorated Quality of Experience (QoE) as they must repeatedly attempt session participation.
Innovation Solution
A method and system where a PoC client performs invitation reservation by transmitting a session participation message to a reception-side PoC server through a transmission-side PoC server, continuously determining participation feasibility and notifying the client when participation is possible, utilizing SIP and XCAP protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a client repeatedly transmits session participation requests when unable to join a chat PoC group, then the client may eventually participate in the session, but the Quality of Experience (QoE) significantly deteriorates due to repeated failed attempts
Solution Approach 1:
The patent applies preliminary action by having the client transmit an invitation reservation request in advance when unable to participate in the chat PoC group. The server stores this reservation information, and when the client later transmits a session participation request, the server checks the reservation and automatically allows participation without requiring repeated attempts. This resolves the contradiction by performing the participation authorization action in advance through reservation, eliminating the need for repeated requests and reducing time loss while maintaining reliable session participation.
2Reliability
If the number limit of a chat PoC group is exceeded, then the group policy is enforced, but the client cannot participate in the session and must repeatedly request participation
Solution Approach 1:
The patent applies preliminary action by allowing the client to reserve an invitation in advance when the group number limit is exceeded. The server stores the reservation information and automatically processes the participation request when the client later attempts to join, eliminating the need for repeated manual requests. This maintains reliable group policy enforcement while significantly improving the ease of operation for clients.
Solution Approach 2:
The patent applies self-service by enabling the server to automatically check reservation information and authorize session participation without requiring repeated client requests or manual intervention. The system serves itself by automatically matching participation requests with stored reservations, reducing operational complexity for clients while maintaining policy enforcement.
3Reliability
If a chat PoC group ID exists but the session has not been initiated, then the group is available, but the client cannot participate and must repeatedly attempt session participation
Solution Approach 1:
The patent applies preliminary action by having the client reserve an invitation in advance when the session has not yet been initiated. The server stores this reservation information, and when the session is later initiated and the client transmits a participation request, the server automatically authorizes entry based on the pre-stored reservation. This eliminates the need for repeated participation attempts and reduces time loss while maintaining reliable group availability.
Data Source
AI summary
Disclosed are a method and a system in which a client intending to participate in a chat Push-to-talk over Cellular (PoC) group, presents a session participation-invitation reservation to a server when the number limit has been exceeded pursuant to the policy of the chat PoC group, or when a chat PoC group ID exists but a corresponding session has not been initiated. Herein, when a client intending to participate in a chat PoC group receives a response indicating participation is not possible because the number limit of the chat PoC group has been exceeded, the client performs invitation reservation until participation is possible.