Texas Instruments Corporation

Sandeep Bhadra

Ramanuja Vedantham

Shantanu Kangude

Eko Nugroho Onggosanusi

Xiaolin Lu

Pierre Bertrand

Tarik Muharemovic

Zukang Shen

Anthony Edet Ekpenyong

Soon-Hyeok Choi

Seung Baek

Patrick W Bosshart

Arvind Kandhalu Raghu

Minghua Fu

Hun-Seok Kim

Shu Du

Aman A Kokrady

Sejoong Lee

Xiaolion Lu

This invention employs an inherent tradeoff in a radio bearer dependent data handling method for intra-E-UTRA handoffs. For user equipment using real time data, the source node forwards to the target node not yet acknowledged real time service data units and disconnects. This makes the handoff latency short at the expense of data traffic between nodes. For user equipment not needing real time data, the source node continues to receive user equipment acknowledgements during a time out period and only forwards service data units acknowledged during the time out period. This reduces X2 interface traffic between the source and target nodes but extends the handoff latency.

Radio bearer dependent forwarding for handover

The duration of receiver on-times may be minimized by sensing and reacting to communication channel power levels at intervals. When no energy is detected on the communication channel, then the receiver may be turned off for a channel sampling interval. If energy is detected on the channel, then the receiver may remain on to determine if a received message is associated with the device. Receiver on-time may also be minimized by adjusting the timing of messages used for broadcast messages sent by routing or other protocols. Broadcast messages, such as network routing topology messages, may be controlled in two phases. In a first phase, the broadcast messages are sent with at a high rate to allow nodes to join the network rapidly. In a second phase, the broadcast messages are sent with at a lower rate to minimize interference with data and other messages in the network.

T/R first and second intervals for strobes and data packets

A method for performing packet lookups is provided. Packets (which each have a body and a header) are received and parsed to parsing headers. A hash function is applied to each header, and each hashed header is compared with a plurality of binary rules stored within a primary table, where each binary rule is a binary version of at least one ternary rule from a first set of ternary rules. For each match failure with the plurality of rules, a secondary table is searched using the header associated with each match failure, where the secondary table includes a second set of ternary rules.

Method and apparatus for packet switching

Systems and Methods for task allocation in a multiprocessor environment employing power management techniques are described wherein tasks are allocated relative to the density given by the ratio of worst-case-execution time and deadline of a task and also the harmonicity of a task's period with respect to a task-set. Tasks are allocated to a given processor based on either minimum density or maximum harmonicity depending on which allocation results in a lower clock frequency. Assigning a task to the processor with lowest density results in balancing the density across processors while assigning task to the processor with maximum harmonicity attempts to maximize the utilization of the processor.

System and method of task allocation in multiprocessing environment based on minimum density or maximum harmonicity that results in lower clock frequency

A system and method for coordinating interference in cellular systems are disclosed herein. In one embodiment, a cellular base station interference coordinator includes an interference estimator. The interference estimator estimates a level of interference caused by transmissions controlled by a host base station for each of a plurality of radio resources, and provides interference estimates corresponding to the radio resources to a target base station. Each interference estimate is based on transmit power and channel strength to the target base station for each transmission controlled by the host base station for a radio resource.

Inter-cell interference coordination

A method for interference management in a self optimizing network includes determining quality of service constraints for a call; mapping the quality of service constraints for the call to a target signal-to-interference noise ratio; and transmitting power control signals for the call based on the target signal-to-interference noise ratio. The utility function can be optimized for each class of calls over the network so as to maximize the total number of calls that can be handled.

System and method for interference reduction in self-optimizing networks

This invention is a method for extending the coverage and/or improving the capacity of wireless communication networks comprising inserting a Relay Node (RN) in the Radio Access Network (RAN). The relay node relays the signal between the Base Station node (eNB) and the User Equipment (UE). The relay node is wirelessly connected to the base station. The base station uses the same radio access technology (RAT) for the base station to user equipment link and the base station to relay node link. The relay node uses the same radio access technology for the base station to relay node link and the relay node to user equipment link. The relay node is non-transparent and seen as base station by the user equipment.

Protocol stack and scheduler for L3 relay

A wireless transmit/receive unit (WTRU) () in a wireless communications system includes a transceiver () for transmitting and receiving data from a plurality of base stations () and a controller () communicatively coupled to the transceiver () and configured to adjust an operation mode of the transceiver (). In the WTRU (), adjusting comprises configuring the transceiver () to begin a radio link handover procedure responsive to receiving a handover (HO) command from a first of the plurality of base stations () over a first communications link, specifying a first time, and reconfiguring the transceiver () to begin a radio link interruption procedure responsive to an expiry of the first time prior to completion of the radio link handover procedure. In the WTRU (), the radio link interruption procedure first attempts to re-establish the first communications link.

System and method for managing radio link failures

This invention extends the coverage and improves the capacity of wireless communication networks using relay nodes. The relay nodes are wirelessly connected to the base station. The base station uses the same radio access technology for a link between the base station and user equipment and between the base station and the relay node. The relay node uses the same radio access technology for a link between the base station and the relay node and between the relay node and the user equipment. The relay node supports at least a Physical Layer (PHY), a Medium Access Control (MAC) sub-layer and a Radio Link Control (RLC) sub-layer protocol.

In-band backhaul for wireless relays in wireless networks

Embodiments of the invention provide a method to efficiently enable Network MIMO for use in the downlink direction. An association is established between a primary NodeB in a first cell and a secondary NodeB in an adjacent second cell. A set of downlink transmission resources is reserved for use by both the primary NodeB and the secondary NodeB. A transport block is transmitted from the secondary NodeB simultaneously with the primary NodeB to a user equipment (UE) near the edge of the first cell in response to a schedule provided by the primary NodeB. A time instance of the reserved transmission resources is released by the secondary NodeB when no simultaneous transmission of a transport block is scheduled within a minimum time.

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Dallas, TX, United States of America

Sandeep Bhadra