Showing papers by "Rapeepat Ratasuk published in 2014"
Patent•
17 Jun 2014
TL;DR: In this article, an uplink subframe can contain an acknowledgment/non-acknowledgment (ACK/NACK) corresponding to at least one of the plurality of downlink subframes.
Abstract: A method for uplink ACK/NACK for LTE TDD. The method includes receiving a frame having multiple subframes wherein a plurality of subframes being downlink subframes and at least one subframe being an uplink subframe. One uplink subframe can contain an acknowledgment/non-acknowledgment (ACK/NACK) corresponding to at least one of the plurality of downlink subframes. To transmit ACK/NACKs, one uplink subframe for ACK/NACK is used in response to one of the plurality of downlink subframes. In addition, ACK/NACK responses can be bundled into one uplink subframe for at least two of the plurality of downlink subframes. In an embodiment, multiple ACK/NACK responses can be used in one uplink subframe that corresponds to at least two of the plurality of downlink subframes in a multiple feedback configuration. One uplink subframe for ACK/NACK responses and bundling multiple ACK/NACK responses is for a bundled feedback configuration.
32 citations
Patent•
10 Feb 2014
TL;DR: In this article, a tri-timer design is proposed for uniform user equipment initialization for both in-coverage and out-ofcoverage device-to-device communications, incorporating an initial timer, a search timer, and an active timer.
Abstract: Methods, apparatuses, and computer program products for providing uniform user equipment initialization procedure for both in-coverage and out-of-coverage device-to device communications are disclosed herein, incorporating a novel tri-timer design: an initial timer, a search timer, and an active timer. In a method a determination is made regarding a user equipment as being a clusterhead candidate which can act as a clusterhead of a cluster. The user equipment searches for a suitable cell or cluster to join. If a suitable cell or a cluster is not found, the user equipment is selected to be a clusterhead which will act as the clusterhead of its own cluster. After selecting the user equipment to be a clusterhead and establishing its cluster, the user equipment transmits a discovery signal which alerting other user equipment to the clusterhead, to which the other user equipment can join. The user equipment as clusterhead then maintains the cluster.
14 citations
Patent•
10 Jun 2014
TL;DR: In this paper, the location of the assigned frequency resources is configurable within the bandwidth of the second communication system and determined according to at least one parameter, where the information for use in determining reference signal locations is communicated to a device belonging to the first communication system.
Abstract: Resources of a first communication system are multiplexed within resources of a second communication system, resources in the first communication system being provided on a narrower bandwidth than the bandwidth of the second communication system. Frequency resources from the second communication system are assigned for the first communication system according to the bandwidth of the first communication system. The location of the assigned frequency resources is configurable within the bandwidth of the second communication system and determined according to at least one parameter. Information for use in determining reference signal locations is communicated to at least one device belonging to the first communication system. When accessing the resources of the first communication system, synchronisation signals in the frequency resources are detected and a broadcast channel of the first communication system is detected using the information derived from the synchronisation signals. At least one reference signal location in a reference signal available for use by the first communication system is then deter mined based on the Information for use in determining reference signal locations.
11 citations
Patent•
27 Oct 2014
TL;DR: In this paper, a method, an apparatus, and a computer program for band and channel selection in a radio system is described, which includes generating, by a network entity, at least one performance map showing performance for different portions of spectrum in a wideband radio system.
Abstract: A method, an apparatus, and a computer program for band and channel selection in a radio system are provided. The method includes generating, by a network entity, at least one performance map showing performance for different portions of spectrum in a wideband radio system. The method may further include combining the at least one performance map with dynamic information, and selecting at least one portion of the spectrum to use for access based on the combined at least one performance map and dynamic information.
5 citations
Patent•
24 Jul 2014
TL;DR: In this paper, the authors propose a method for long-term evolution unlicensed communication systems to benefit from dynamic trigger-based synchronization, which can include receiving, at a device, a cell search and/or synchronization command from the network on the primary cell.
Abstract: Synchronization may be valuable in many communication systems. For example, long term evolution unlicensed may benefit from dynamic trigger-based synchronization. A method can include receiving, at a device, a cell search and/or synchronization command from the network on the primary cell. The method can also include performing, by the device, cell search and/or synchronizing on a secondary cell based on the cell search and/or synchronization command.