US Patent No: 5,226,045

Number of patents in Portfolio can not be more than 2000

Method and apparatus for autonomous selective routing during radio access in TDMA portable radio systems

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Abstract

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In a TDM/TDMA digital radio communications system, each portable unit in accessing the system must select the 'best' port through which to route each call. The so called 'best' port may not, however, have an idle time-slot to accommodate the call. Attempts to route a call through a busy 'best' port, or busy 'second best' port will decrease the throughput of the network and result in increased call setup time. An autonomous selective routing scheme is described which increases system throughput and decreases call setup time. When a user at a portable unit (301) desires to access the network, the portable unit scans (308, 309) the downlink frequencies associated with each of the ports in the system. For each port, the portable measures signal quality (310) and determines from the received bit patterns (313) whether the port has an idle time-slot. The highest signal quality measure for a port having an idle time-slot is determined (315) and the call is routed through that port if that highest signal quality measure exceeds (317) a predetermined quality measure threshold. Otherwise, the call is blocked.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
INTELLECTUAL VENTURES II LLCWILMINGTON, DE, US218

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chuang, Justin C Holmdel, NJ 21 890

Cited Art Landscape

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Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
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