Quick Page Message Partial Identifier Bit Allocation
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Solution Overview
Problem
Current quick paging schemes in radio communication systems, such as CDMA2000 EV-DO, face challenges in minimizing false wakeups of access terminals, leading to excessive battery depletion, especially when the number of pages increases, as they do not effectively utilize all available bits in the quick page message, resulting in reduced battery longevity.
Innovation Solution
The proposed solution involves forming a quick page message with partial identities of varying bit lengths to create redundant values, which are then removed, allowing the freed bits to increase the lengths of other partial identities, thereby reducing the likelihood of false wakeups. This is achieved through a determiner that determines page values, a comparator that identifies redundancies, and a rearranger that reallocates bit lengths within the quick page message.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of pages in the quick page message increases, then the paging capacity is improved, but the probability of false wakeup increases leading to excessive battery depletion
Solution Approach 1:
The access terminal identifier is segmented into multiple partial identifiers of different bit lengths. By dividing the identifier into segments (e.g., first partial identifier with 5 bits, second partial identifier with 3 bits), the system can pack more identifiers into the limited quick page message while maintaining unique identification. This segmentation allows the quick page message to accommodate more pages without increasing false wakeup probability, as each segment contributes to the overall unique identification when combined.
Solution Approach 2:
Different partial identifiers are assigned different bit lengths based on their specific needs. Some partial identifiers use more bits for unique identification, while others use fewer bits. This local quality variation optimizes the use of available message bits, allowing the system to include more total pages in the quick page message while maintaining low false wakeup probability through the combined uniqueness of all partial identifiers.
2Device complexity
If fixed bit lengths are used for all partial identities, then the message structure is simplified, but the available bits are not optimally utilized
Solution Approach 1:
The quick page message structure uses asymmetric bit length allocation for different partial identifiers rather than uniform bit lengths. For example, the first partial identifier may use 5 bits while the second uses 3 bits. This asymmetric structure optimizes bit utilization by allocating more bits to identifiers that need greater discrimination and fewer bits to those that don't, thereby increasing the total number of unique identifiers that can be packed into the message without significantly complicating the overall structure.
3Measurement precision
If all available bits are allocated to partial identities, then the identification precision is improved, but no bits remain for error correction or additional information
Solution Approach 1:
Instead of allocating all available bits to partial identifiers for maximum identification precision, the system uses only the necessary number of bits to achieve sufficient discrimination. For example, if a 32-bit identifier is divided into partial identifiers totaling 20 bits, the remaining 12 bits can be allocated to error correction codes or additional paging information. This partial action approach ensures that identification precision is adequate while preserving bits for reliability and additional functionality.
Data Source
AI summary
Apparatus, and an associated method for facilitating paging of an access terminal operable in a radio communication system. The access terminal is identified by part of a pseudorandom, or random, number, such as a session seed. The part of the number is included in the page message when the access terminal is to be paged. When included in the message, the access terminal detects the page and the part of the number contained therein that identifies the access terminal.