Abstract:
At least one retransmission request is received from each of a plurality of wireless devices receiving a multicast broadcast, and a number of retransmission requests received from each of the plurality of wireless devices is determined. A first group of wireless devices is selected from among the plurality of wireless devices, and a delay time is determined for each wireless device in the first group based on the respective number of retransmission requests from each wireless device. When a data packet is not received at the one or more wireless devices of the first group, a timer is started at each of the wireless devices of the first group using the respective delay times. When the shortest delay time expires, another retransmission request is received from the wireless device comprising the shortest delay time of the one or more wireless devices.
Abstract:
In an embodiment, a location, a type of application, and a probability of transition to a no-coverage area are determined for each of a plurality of wireless devices in communication with an access node, and a collaborative group of wireless devices which have requested a data stream are selected. A first portion of the data stream is sent to each wireless device to synchronize the requested data stream, and at least one additional portion of the data stream is sent to each wireless device, where a number of the at least one additional portions sent to each wireless device is based on a modulation and coding scheme assigned to each wireless device. A mapping table is broadcast to the collaborative group, and the wireless devices exchange the additional portions of the data stream according to the mapping table when the collaborative group transitions to the no-coverage area.
Abstract:
Systems, methods, and processing nodes for communicating with a wireless device via at least two access nodes include communicating with a wireless device via at least two access nodes includes receiving, at a relay access node coupled to a donor access node, downlink data intended to be transmitted to an end-user wireless device attached to the relay access node; determining that a signal condition at the relay access node meets a criteria; and in response to determining that the signal condition meets the criteria, forwarding the downlink data to the donor access node. The donor access node transmits the downlink data to the end-user wireless device, and the relay access node maintains a control channel with the end-user wireless device.
Abstract:
Estimating uplink interference includes determining any wireless devices having available uplink resources, and instructing the wireless devices to estimate and report uplink interference. A method for estimating uplink interference in a wireless network includes determining that a wireless device attached to an access node has available resources within an uplink schedule of the wireless device, and instructing the wireless device to enter a listening mode during the available resources of the uplink schedule. In the listening mode, the wireless device determines a measurement of an uplink interference caused at the wireless device. The method further includes receiving the measurement of the uplink interference from the wireless device via an uplink channel.
Abstract:
Transmitting data via frame reconfiguration comprises encoding, at a source node, the data into a plurality of frame configurations, each of the plurality of frame configurations comprising a sequence of uplink and downlink subframes, and communicating, via an antenna of the source node, using the plurality of frame configurations, wherein a target node is configured to identify the plurality of frame configurations and decode the data.
Abstract:
Systems and methods are described for enhanced multi-antenna transmission. At a multi-antenna system of a first access node, implicit transmit symbols are assigned to a plurality of antennas. At least two antennas are selected from the plurality of antennas to simultaneously transmit explicit symbols to a wireless device. The explicit symbols are used at the wireless device to decode the implicit transmit symbols.
Abstract:
A transmit power level of a wireless device is adjusted based on an uplink interference to neighboring sectors caused by the transmit power level. The wireless device can estimate the uplink interference using a reference signal transmitted by each neighboring sector. The uplink interference is based on a loss of signal strength of the reference signal as measured at the wireless device, i.e. a path loss. A determination is made to adjust the transmit power level of the wireless device so as to improve a coverage area of the serving sector, without generating excessive interference in neighboring sectors. Consequently, a transmit power level increase is based on a function of the data demand of the wireless device, the interference caused to neighbors, and the load on neighboring sectors.
Abstract:
Systems and methods are described for allocating resources using enhanced semi-persistent scheduling (SPS) in a wireless network. A plurality of wireless devices may be in wireless communication with an access node. Based on application requirements of the wireless devices, the access node may allocate dedicated resource slots on a persistent schedule for each wireless device requesting SPS services. The wireless devices having the SPS allocations of dedicated resource slots are monitored at intervals for changes in amount of resource usage above or below the size of the dedicated resource slot for each wireless device. If a data transmission for a wireless device exceeds the dedicated resource slot allocated to that wireless device, then the transmission may be truncated, with a first portion being transmitted in the dedicated resource slot and a second portion being transmitted in one or more non-dedicated resource slots.
Abstract:
Systems and methods are described for allocating resources between frequency bands in a wireless network. A wireless device may establish multiple default channels for wireless communication with two or more cells associated with different frequency bands. The default channels on each of the cells may be used to communicate control signals between the two or more cells and the wireless device. Application requirements may be determined and each of the cells may assign a dedicated channel for service, and one of the dedicated channels may be selected to provide service to the wireless device based on the determined application requirements.
Abstract:
A first wireless communication network stores a buffer of data that is concurrently being sent to a wireless device via a first active connection with a second wireless communication network. A first indicator is received by the wireless device. The first indicator is associated with an availability of an access node of the first wireless communication network to serve the wireless device. Based on the first indicator and based on a second indicator of a signal strength associated with the access node, the wireless device ends the first active connection. The first wireless communication network provisions a second active connection to the wireless device. The first wireless communication network provisions the second active connection in response to a request by the wireless device. Data not already received by the wireless device is provided, via the second active connection, to the wireless device.