Abstract:
A base station includes a radio communication unit that establishes communication with a mobile communication terminal using a plurality of component carriers. The base station further includes a determination unit that determines a handover factor. The base station also includes a control unit allocates to the mobile communication terminal a measurement time interval for at least one component carrier from the plurality of component carriers according to the handover factor. A channel quality of the at least one component carrier of another base station is measured during the measurement time interval.
Abstract:
A method operating a telecommunications system including a base station and plural terminal devices arranged to communicate over a radio interface supporting a downlink shared channel conveying user-plane data from the base station to the terminal devices and a downlink control channel conveying control-plane data from the base station to the terminal devices. The control-plane data conveys information on physical resource allocations for the downlink shared channel for respective of the terminal devices. The radio interface is based on a radio frame structure including plural subframes each including a control region supporting the downlink control channel and a user-plane region supporting the downlink shared channel. The method uses the control region of a first radio subframe to convey an indication of a physical resource allocation for a first terminal device on the shared downlink channel in the user-plane region of a second radio subframe subsequent to the first radio subframe.
Abstract:
A method operating a telecommunications system including a base station and plural terminal devices arranged to communicate over a radio interface supporting a downlink shared channel conveying user-plane data from the base station to the terminal devices and a downlink control channel conveying control-plane data from the base station to the terminal devices. The control-plane data can convey information on physical resource allocations for the downlink shared channel for respective of the terminal devices. The radio interface uses a radio frame structure including plural subframes. Each subframe includes a control region supporting the downlink control channel and a user-plane region supporting the downlink shared channel. The method uses the control region of a first radio subframe to convey an indication of a physical resource allocation for a first terminal device on the shared downlink channel in the user-plane region of a second radio subframe subsequent to the first radio subframe.
Abstract:
A first communications device is operable to transmit device-to-device communications to a second communications device using a wireless access interface of a wireless telecommunications system, access to the wireless access interface being coordinated by a coordinating entity. The first communications device comprises a controller and a transceiver, the controller being configured in combination with the transceiver to receive from the coordinating entity an indication of an identifier associated with a device-to-device communications link between the first and second communications devices, to transmit to the coordinating entity a message requesting resources of the wireless access interface for transmitting data across the device-to-device communications link, to receive from the coordinating entity an indication of a resource allocation of the wireless access interface associated with the identifier, and to transmit the data to the second communications device using the allocated resources.
Abstract:
Schemes for supporting device-to-device, D2D, communications between terminal devices in a wireless telecommunication system. A network entity, e.g. a base station, establishes a set pool of radio resources to be reserved for use for D2D communications and communicates an indication of these resources to terminal devices. On an ongoing basis the network entity monitors the extent to which the set of radio resources reserved for D2D communications is being used, for example based on feedback received from terminal devices or its own measurements. If it is determined the set of radio resources reserved for D2D communications is being under-utilized or over-utilized, the network entity may establish an updated set of radio resources to be used for D2D communications, and communicate this to the terminal devices. Thus a mechanism is provided for dynamically adjusting the size of a set of resources available for D2D communications in response to changing resource utilization.
Abstract:
A method receiving data at a communications terminal from an OFDM wireless communications network including a wireless access interface communicating the data using plural OFDM sub-carriers includes: receiving from a first control channel having a bandwidth corresponding to a first frequency band providing first plural OFDM sub-carriers a resource allocation message allocating communications resources of a second group of OFDM sub-carriers; and receiving from a second control channel within the second frequency band within the second group of OFDM sub-carriers control information specific to the communications terminal operating to receive the data via the second group of OFDM sub-carriers. The communications terminal receives resource allocation messages from the first control channel to allocate resources within the second frequency band forming a virtual carrier and to receive control information specific to the communications terminal, which receives data from the second frequency band of the virtual carrier via a second control channel.
Abstract:
A method of communicating data to mobile terminals from an OFDM wireless communications network including a wireless access interface for communicating the data using a plurality of OFDM sub-carriers includes providing a first control channel having a bandwidth corresponding to a first frequency band at a first temporal position within a sub-frame, and transmitting resource allocation messages in the first control channel allocating communications resources of a first group of OFDM sub-carriers to communications terminals of a first type and allocating communications resources of a second group of OFDM sub-carriers to communications terminals of a second type. The method provides a second control channel within the second frequency band within the second group of OFDM sub-carriers in a second temporal position within a sub-frame, and transmits control information which is specific to the terminals of the second type operating to receive the data via the second group of OFDM sub-carriers.
Abstract:
A mobile station in a wireless communication network. The mobile station includes a radio communication that transmits an access request message to a base station via a first communication resource, and receives a timing adjustment in response to the access request message from the base station. The mobile station also includes an adjustment value storage unit that stores the timing adjustment, and a control unit that adjusts access timing corresponding to a second communication resource based on the timing adjustment value stored in the adjustment value storage unit. The radio communication unit then communicates with the base station via the first communication resource and the second communication resource.
Abstract:
A communications device is configured to transmit and receive data via a wireless access interface provided by a mobile communications network. The wireless access interface provides a plurality of communications resource elements across a host frequency range of a host carrier, and providing a first section of the communications resources within a first frequency range for preferable allocation to reduced capability devices forming a first virtual carrier and, the first frequency range being within the host frequency range, and the wireless access interface includes a plurality of time divided sub-frames, and at least one of the sub-frames includes a control channel in a part of the sub-frame for communicating signaling messages to the communications devices and the reduced capability devices. The mobile communications network transmits first resource allocation messages to the communications devices to allocate one or more of the plurality of communications resource elements of the host frequency range of the host carrier and transmits second resource allocation messages to the reduced capability devices to allocate one or more of the first section of the communications resources within the first frequency range for preferable allocation to the reduced capability devices of the first virtual carrier, the first resource allocation messages identifying one or more of the communications resource of the host carrier allocated to the communications devices with reference to a first reference frequency of the host frequency band and the second resource allocation messages identifying the one or more communications resources of the first virtual carrier allocated to the reduced capability devices with reference to a second reference frequency within the first virtual carrier. As a result the amount of signalling information in the second resource allocation messages which is transmitted to the reduced capability devices to allocate resource in the virtual carrier can be reduced.
Abstract:
An apparatus and method providing feedback on channel conditions in a wireless telecommunications system including a base station to communicate with plural terminals device using frequencies spanning a system frequency bandwidth. At least one terminal device is a reduced capability terminal device including a tuneable transceiver configured to receive downlink transmissions from the base station using only a restricted frequency bandwidth smaller than and within the system frequency bandwidth. The reduced capability terminal device is configured to communicate information derived from measurements of channel conditions to the base station. The information may include an indication of measured channel conditions for different frequency locations, or an indication of one or more frequency locations for which corresponding measurement of channel conditions meet a pre-defined selection criterion. The base station subsequently schedules downlink transmissions for the terminal device in a manner that takes account of the information received from the terminal device.