Motorola Mobility LLC

Google Inc.

Motorola Solutions, Inc.

Roberta Fracchia

Vincent Merat

Chidambar Zinnoury

David Grandblaise

Remy Pintenet

Sophie Gault

A communication network comprising a Network Address Translator (NAT) arranged to translate between a public NAT address and a plurality of private NAT addresses. A network element has a plurality of network interfaces each of which corresponds to a private NAT address. A connection processor sets up a connection for data communication which is capable of supporting a plurality of network interfaces of the network element. An identifier processor initializes a network interface identifier for identifying individual network interfaces for the connection. The network interface identifier is distributed to the NAT and the network elements of the connection. Incoming data packets for the network elements are then adapted to include the network interface identifier and the NAT uses this to address the data packets in response to the first network interface identifier.

Communication network and method of operation therefor

A wireless communication unit () for a radio communication system comprises a device token controller () which receives at least a first geographical radio resource token allocated to the wireless communication unit () by a radio resource token controller () of a network of the radio communication system. The first geographical radio resource token provides a first radio resource right allocation to the wireless communication unit () for a first geographical area. A radio resource manager () then determines a radio resource usage parameter in response to the first radio resource right allocation. Specifically, the radio resource manager () may only determine the radio resource usage parameter in response to the first radio resource right allocation if the location estimate is within the first geographical area. The radio communication system may be a heterogeneous communication system. The invention may allow effective overall centralized radio resource management while allowing distributed radio resource management procedures and techniques to be used.

Radio resource management

A wireless local area network comprising an access point and a plurality of remote stations arranged to communicate using Orthogonal Frequency Division Multiplex (OFDM). The system can operate in a first access mode wherein access to the access point is in accordance with a Carrier Sense Multiple Access (CSMA) scheme and in a temporary second access mode wherein access to the access point is in accordance with a Time Division Multiple Access (TDMA) scheme. A resource allocation of resource blocks when in the TDMA mode is furthermore such that resource blocks may be allocated to a plurality of remote stations which have overlapping time intervals and disjoint sets of OFDM subcarriers thereby allowing simultaneous communication for the plurality of remote stations within the overlapping time interval. The access operation is controlled by a single message transmitted from the access point. The invention may in particular be suitable for IEEE 802.11 systems.

Wireless local area network

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Paris, France

Roberta Fracchia