Base Station Wait-for-Page Access Channel Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, base stations often become overloaded, leading to repeated unsuccessful attempts by wireless communication devices (WCDs) to establish connections, which increases traffic on the access channel and exacerbates interference between transmissions.
Innovation Solution
A base station sends a 'wait-for-page' message to WCDs when overloaded, causing them to idle and wait for a page message before retrying connection requests, allowing the base station to save service requests and allocate resources only when sufficient capacity is available, thereby reducing unnecessary access channel communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station rejects service requests when overloaded, then network resource capacity is preserved, but connection establishment time increases and access channel traffic increases
Solution Approach 1:
The base station performs preliminary evaluation of network resource capacity before accepting service requests. When overload is detected, the base station proactively sends a wait-for-page message to prevent unnecessary access channel transmissions, thereby preserving network resources while reducing repeated failed connection attempts.
Solution Approach 2:
The base station implements a feedback mechanism by sending wait-for-page messages to WCDs when overloaded. This feedback informs WCDs to delay their service requests, creating a control loop that regulates access channel traffic and prevents network overload without requiring repeated connection attempts.
2Reliability
If WCDs repeatedly attempt connection when rejected, then connection success probability increases, but access channel interference increases
Solution Approach 1:
The wait-for-page message acts as an intermediary control mechanism between the base station and WCDs. Instead of direct repeated access attempts causing interference, the intermediary message coordinates timing, allowing WCDs to delay transmissions until network conditions are favorable, thereby reducing access channel interference while maintaining connection success probability.
Solution Approach 2:
The invention transforms continuous repeated access attempts into periodic action by implementing exponential backoff timing. WCDs wait for specified intervals (e.g., 2 seconds, then 4 seconds, then 8 seconds) before retrying, converting harmful continuous interference into controlled periodic transmissions that reduce overall channel congestion.
3Speed
If the base station allocates resources immediately upon receiving service requests, then connection establishment speed increases, but network overload occurs during high traffic periods
Solution Approach 1:
The base station performs preliminary evaluation of network resource capacity before allocating resources. By assessing available capacity in advance and sending wait-for-page messages when overloaded, the system prevents resource allocation that would cause network instability, while still enabling rapid connection establishment when resources are available.
Solution Approach 2:
The resource allocation system becomes dynamic by adjusting its behavior based on real-time network conditions. When network capacity is sufficient, the base station immediately allocates resources for fast connection establishment. When overload is detected, it dynamically switches to sending wait-for-page messages, creating a flexible system that adapts to varying traffic conditions to maintain network stability.
Data Source
AI summary
A method for managing access channel traffic during congested network conditions is disclosed. A wireless connection device (WCD) sends a service request to a particular base station for a particular quantity of network resources. Upon the particular base station determining that it is too loaded with network traffic to accommodate the service request, the base station saves an indication of the WCD's connection request, and responds with a communication to instruct the WCD to idle and wait for a page from the base station. The WCD, upon receiving the communication, does not send a service request for a greater quantity of network resources than the particular quantity until the WCD receives a page. Once the base station determines it has sufficient network resources to allocate to the WCD, the base station sends a page to the WCD, which causes the WCD to send another service request.