Motorola Corporation

Other

Mark G Demange

Frederick W Vook

William K Doss

Hungkun J Chang

Richard E White

A packet delivery method for assuring the delivery of packets in an wireless local area network (LAN) having a service access point (AP) and a plurality mobile user devices, said user devices in communication with each other and with the access point. The access point determines when a destination device is in the sleep mode of operation and stores data packets intended for that device in memory. Thereafter the access point determines when the destination device enters the active mode of operation, delivers the data packets to the destination device and informs the source device of delivery of the data packets to the destination device.

Packet delivery method for use in a wireless local area network (LAN)

A power management technique for use in an wireless communication system having a service access point and a plurality mobile battery powered user devices, user devices in communication with each other and with the access point, power management technique for determining when a user device may transition from an active mode of operation to a sleep mode of operation and further for determining when a user device in the sleep mode of operation should transition to the active mode of operation.

Power management technique for determining a device mode of operation

A method used in a communication system (10) having central controllers (14) in communication with a plurality of user devices (12) where synchronizing data (34) and user data (35) are transmitted for a predetermined period of time defining a dwell (30). The method for delivering data to more than one user device (12) simultaneously includes the steps of providing an indicator (34) associated with at least a portion of a dwell indicating that the transmission of user data (35) is directed towards more than one user device (12), and informing the user devices of the repetition rate at which the indicator is transmitted. The user device schedules periods of time during which it is enabled and disabled respectively, based upon the repetition rate of the indicator received such that the user device is enabled and receives the data directed towards more than one user device.

Method for delivering broadcast packets in a frequency hopping local

A power management and packet delivery method for use in a wireless local area network (LAN) having a plurality of mobile battery powered user devices, the user devices in communication with each other, the power management and packet delivery technique for determining when a user device may transition from an active mode of operation to a sleep mode of operation and further for determining when a user device in the sleep mode of operation should transition to the active mode of operation. The method further operative to inform an intended destination device that data is forthcoming, thereby prohibiting that device from entering the sleep mode until after the data has been delivered.

Power management and packet delivery method for use in a wireless local

A method for prioritizing data transmissions in a frequency hopping communication system (10) includes defining a predetermined number of time slots at the beginning of a dwell or end of a transmission, each time slot having a duration and a data type, the communication device attempting to transmit data if the data type of the data corresponds to the data type of the slot, the attempt being based on at least one of the first and second assigned probability of transmission values, assigning the second probability of transmission value to the communication device if the attempt succeeds, reassigning the first probability of transmission value to the communication device if the transmission of data is complete.

Method for controlling channel access priorities in a frequency hopping

User device (12) classes are established in a communications network (100). An access point (10) utilizes a first password to create an encryption key, then generates a plurality of secondary passwords for use by devices (12). User device (12) classes are established by assigning a secondary password to a respective class of users, determining the network access permitted the class, determining the network services provided to the class and finally assigning the secondary password to a device (12') seeking to communicate within the network (100).

Method for establishing classes within a communication network

Within a radio frequency (RF) communications system (200) having a plurality of transceivers (10) operating at various frequencies (F1-FN) within a predetermined range, a method (700-722) and apparatus (600) for selecting an operating frequency from within said range for use by communications equipment (10) commencing operation within said system (200). Said method and apparatus comprising apparatus and method steps whereby the communications equipment (10) scans (at 706), from its intended location of operation, a set of frequencies (F1-FN) within said range, stores (at 708-714) a table of information (800) corresponding to signals (300) sensed during said scanning, evaluates (at 716) the stored information to determine (at 718) a number of interference sources associated with each scanned frequency, and selects (at 722) that frequency from within the range having the least number of associated interference sources.

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Schaumburg, IL, United States of America

Mark G Demange