Blackberry Corporation

Malikie Innovations Limited

Research in Motion Corporation

René Faurie

Takashi Suzuki

Richard Charles Burbidge

David Philip Hole

Werner Karl Kreuzer

Satish Venkob

Steven Michael Hanov

Remo Borsella

Eswar Kalyan Vutukuri

Eniko Sokondar

Parry William Owen Owen

Claude Jean-Frédéric Arzelier

Owen Parry

A device, serving cell and method of switching between modes of operation for the device in a cellular network comprises receiving a service via a connection with the serving cell. A condition indicative of deterioration in network service and an absence of a suitable neighbor cell are detected. In response, discovery of relay nodes is initiated. When a suitable relay node is discovered, a mechanism to switch to receiving the service via the suitable relay node is initiated. The service may be a mission critical push-to-talk over Long Term Evolution service. The relay node may be user equipment acting as a user equipment-to-network relay node. When the device is in an RCC_CONNECTED state, the mechanism to switch includes sending a relay mode preference indication to the serving cell, receiving a connection release message from the serving cell, releasing the serving cell connection, and establishing a sidelink connection with the relay.

Switching between network based and relay based operation for mission critical voice call

Example base stations and methods for receiving transmissions on an enhanced random access channel (RACH) are disclosed herein. An example method for receiving transmissions on an enhanced RACH from a device such that an initial access burst is received in a single time slot from the device involves receiving the initial access burst from the device on the enhanced RACH. The initial access burst is sent by the device using a timing advance determined at the device. The initial access burst includes at least one of an identifier or user data. The enhanced RACH is a contention-based uplink-only channel requiring use of timing advances for transmissions thereon.

Base stations and methods for receiving transmissions on an enhanced random access channel

Example communication stations and methods for transmitting additional information on an enhanced random access channel (RACH) are disclosed herein. An example method performed by a device involves generating an initial access burst for transmission on an enhanced RACH and transmitting the initial access burst using a timing advance. The timing advance is to cause the initial access burst to be received at the network within a single time slot of the enhanced RACH. The initial access burst includes at least one of information about capabilities of the device or information identifying the device. The example method also involves receiving a temporary block flow (TBF) assignment from the network in response to sending the at least one of the information about the capabilities of the device or the information identifying the device.

Communication stations and methods for transmitting additional information on an enhanced random access channel

Methods and apparatus to report link quality measurements for downlink dual carrier operation are disclosed. Example methods and apparatus disclosed herein implement one or more example techniques for reporting link quality measurements involving, for example, modifying measurement reporting messages to increase the number and/or types of link quality measurements that can be reported, permitting mobile stations, when appropriate, to use different reporting messages capable of supporting more link quality measurements, and/or prioritizing certain link quality measurements to be reported when the reporting messages do not contain sufficient space to report all requested and/or specified link quality measurements.

Methods and apparatus to report link quality measurements for downlink dual carrier operation

Example communication stations and methods for transmitting on a random access channel (RACH) in wireless networks are disclosed herein. An example method for transmitting on an enhanced RACH by a device such that an initial access burst is received in a single time slot by a wireless network involves determining a timing advance, the timing advance being associated with a serving cell. The example method also involves transmitting, using the determined timing advance, the initial access burst, on the enhanced RACH, that includes at least one of an identifier or user data.

Communication stations and methods for transmitting on a random access channel

Methods, apparatus and articles of manufacture for single antenna interference cancellation in a mobile communication system are disclosed. An example method disclosed herein for a wireless device comprises determining a number of bursts to be received in a time division multiple access frame comprising a plurality of timeslots, and when the number of bursts exceeds a threshold number of bursts for which single antenna interference cancellation can be performed, performing single antenna interference cancellation for a subset of the bursts received in the time division multiple access frame.

Single antenna interference cancellation in a mobile communication system

Example methods and apparatus to indicate space requirements for communicating capabilities of a device are disclosed. In accordance with a disclosed example method, a request is sent to a network to request a quantity of blocks to be allocated for use by a mobile station. The quantity of blocks is determined based on a data size to identify radio access capabilities of the mobile station. An allocation of the quantity of blocks is received from the network. Radio access capability information of the mobile station is sent via the allocated blocks.

Methods and apparatus to indicate space requirements for communicating capabilities of a device

Example methods and apparatus to implement timing advance enhancements for cellular communications are disclosed. A disclosed example method to communicate over a cellular network by a device involves retrieving a stored timing advance value and determining if the stored timing advance value is valid based at least on whether the device is operating in a stationary mode. When the stored timing advance is valid, a contention-based transmission is transmitted to a network using the stored timing advance value in order to compensate for propagation delay.

Timing advance enhancements for cellular communications

Example methods and apparatus to signal use-specific capabilities of mobile stations to establish data transfer sessions are disclosed. In accordance with a disclosed example method, a message is generated to initiate a data transfer session between a mobile station and a network. The message adaptable to indicate different radio access capabilities information of the mobile station. A subset of the different radio access capabilities information of the mobile station is indicated in the message. The indicated subset pertaining to a specific type of use by the mobile station for the data transfer session. The message is sent from the mobile station to the network.

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Courbevoie, France

René Faurie