Patent application number | Description | Published |
20090088164 | HANDOVER CONTROL METHOD IN A WIRELESS ACCESS SYSTEM, RELAY STATION AND BASE STATION - The present invention provides a handover control method in a wireless access system, a relay station and a base station for performing handover control in a mobile multi-hop relay wireless access system such that the wireless access system is enabled to cover a wider area. To achieve the above object, the present invention provides a handover control method in a wireless access system, wherein the wireless access system comprises a mobile station and a base station, which receive and send message via a wireless channel, and further comprises a relay station for forwarding message from the mobile station and the base station under control of the base station, characterized in that the method comprising a relay station measure and arbitration step in which the relay station measures the message and arbitrates whether to relay the message, and a base station measure and handover step in which the base station measures the message and arbitrates whether to perform handover. | 04-02-2009 |
20090088165 | RELAY STATION, BASE STATION AND METHOD FOR EXTENDING A COVERAGE AREA OF A BASE STATION IN A RADIO NETWORK - A method for extending a coverage of a base station in a wireless communication network is disclosed, characterized in that a relay station transfers control information and communication related information between the base station and the mobile station according to an indication of the base station. | 04-02-2009 |
20090097433 | RELAY METHOD OF WIRELESS ACCESS SYSTEMS AND BASE STATION, RELAY DEVICE AND REPLAY SYSTEM THEREOF - The present invention is directed to provide a relay method in a wireless access system, including comprising the following steps: in downlink direction, receiving downlink data from a base station, wherein the downlink data include control information for relay operation; constructing downlink data to be retransmitted; retransmitting the constructed downlink data to wireless communication terminals according to a profile specified by the control information; and, in uplink direction, receiving uplink data from the wireless communication terminals according to a profile specified by the control information; recovering the uplink data of the wireless communication terminals; and retransmitting the uplink data to the base station according to the profile specified by the control information. The present invention further provides the corresponding base station device, relay device and wireless relay system. Through the present invention, the base station is able to perform centralized control of the entire mobile multi-hop relay system, which effectively reduces the complexity of the relay device and can realize a transparent transportation with respect to wireless communication terminals. | 04-16-2009 |
20090097434 | Frame Constructing and Frame Processing Methods, Device and System In Multi-Hop Access Network - The present invention discloses a frame constructing method for use in a multi-hop wireless access network, the method comprising the steps of: determining Relay Stations (RSs) and Mobile Stations (MSs); setting a DL sub-frame; setting an UL sub-frame; and constructing a completed frame based on the UL sub-frame and the DL sub-frame; wherein the step of setting the DL sub-frame comprises a step of setting a DL relay sub-frame field for DL relay information sent to the RS; and the step of setting the UL sub-frame comprises a step of setting an UL relay sub-frame field for UL relay information sent from the RS. The present invention further discloses a corresponding frame processing method and a device, base station, relay station and system for implementing the method. According to the present invention, the synchronization in the whole network system is ensured, and the handover operation when the MS moves is simplified. Moreover, the situation that the base station and the relay stations use different frequencies can be supported. Additionally, the delay of traffic transmission is decreased. | 04-16-2009 |
20090313518 | METHOD AND APPARATUS FOR HYBRID AUTOMATIC REPEAT REQUEST - The present invention provides two primary Hybrid Automatic Repeat reQuest (HARQ) mechanisms for a multi-hop network, i.e. an active Mobile Multi-hop Relaying (MMR) HARQ and a passive Mobile Multi-hop Relaying (MMR) HARQ. According to the solution of the present invention, there are provided a method and a device for HARQ retransmission in relay stations of a wireless communication network, wherein in HARQ retransmission, the HARQ procedure is implemented based on resource allocated by a base station; and a method and device for HARQ in a base station, characterized in that a HARQ procedure is implemented in-between one or more relay stations and a mobile station. With the methods of the present invention, the HARQ problems existing in a multi-hop network are overcome, the correction rate of data transmission is improved, while time delay for data transmission is reduced. | 12-17-2009 |
20100309792 | METHOD AND DEVICE FOR DATA RELAY TRANSMISSION IN WIRELESS RELAY NETWORK - A method and a device for data relay transmission in a wireless relay communication network are provided, in which, the relay station directly obtains corresponding egress CID related information based on input MAC PDUs, then generates output MAC PDUs including the egress CID related information, and at last, according to the egress CID related information, performs QoS scheduling for the output MAC PDUs, so as to output them in an sequence of QoS. The invention omits the steps of de-cascading, de-segmenting or de-capsulating the MAC PDUs in order to obtain MAC SDUs, and the steps of scheduling by category, cascading, segmenting, and encapsulating the MAC SDUs in order to re-generate the MAC PDUs in the prior art, and the invention simplifies the data processing procedure and achieves the goal of decreasing the relay latency. Preferably, before the relay station generates the output MAC PDUs based on the input MAC PDUs, it can also schedule the input MAC PDUs based on the ingress CID information therein, so as to further improve the QoS service performance. | 12-09-2010 |
20110044295 | METHOD AND APPARATUS FOR TRANSMISSION MODE SELECTION IN COOPERATIVE RELAY - In accordance with an example embodiment of the present invention, an apparatus, comprising at least one processor; and at least one memory including computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus to perform at least the following: select at least two relay stations from a plurality of relay stations; determine a transmission mode for cooperatively forwarding a data packet by the selected relay stations; schedule a resource allocation for the selected relay stations based at least in part on the transmission mode; and notify the selected relay stations of the resource allocation, is disclosed. | 02-24-2011 |
20110069653 | MULTICAST SERVICE - A method including sending a multicast packet to a cluster of recipients; receiving information indicating receiving status relating to the multicast packet from individual members of the cluster of recipients; and initiating intra-cluster retransmission of said multicast packet by sending to the cluster of recipients collective information about the receiving statuses of the members of the cluster of recipients. | 03-24-2011 |
20120184306 | Random Access Process Reusing For D2D Probing in Cellular-Aided D2D Networks - Methods and apparatus, including computer program products, are provided for selecting between a device-to-device link or a 2-hop cellular link In one aspect there is provided a method. The method may include monitoring, at a user equipment, a paging signal, the paging signal including a random access preamble index assigned to another user equipment. The user equipment may be configured to use the random access preamble index assigned to the another user equipment, and receive a signal comprising a random access preamble. The user equipment may measure the received signal to generate an indication representative of a quality of the received signal. Based on the indication rather than a dedicated probe, a determination may be made regarding whether to establish a first connection directly to the another user equipment. Related apparatus, systems, methods, and articles are also described. | 07-19-2012 |
20120254890 | Small Data Transmission For Detached Mobile Devices - A M2M device sends on a random access channel an indication of a small data transmission, and thereafter sends the small data on an initial uplink resource allocated in response to the indication. The network sends a connection rejection message which the M2M device interprets as an acknowledgement of the small data it sent. In one embodiment the indication is explicit and also indicates priority, type and/or size of the small data. In another embodiment the indication is implicit such as a RACH preamble signature sequence reserved for this purpose, where different reserved sequences map to different sizes for the small data. If needed a second indication can be sent with the small data which indicates its type, size and/or priority. The connection rejection message may indicate the acknowledgement via a cause value, and in response the M2M device then automatically enters an idle or a detached mode. | 10-04-2012 |
20120264434 | Method and Corresponding Apparatus for Coordinating Executions of Intra-Radio Handover - The present invention proposes a method and corresponding apparatus for coordinating the executions of intra-radio handover, wherein the method comprising determining an intra-radio handover is to be executed on a communication device; and coordinating the execution of the intra-radio handover to determine whether to postpone the execution of the intra-radio handover, so that there is at least one active radio on the communication device. | 10-18-2012 |
20120289170 | Method and Apparatus for Providing Uplink Control Signalling in a Multi-Radio Access Environment - Various methods for providing control signaling in a multi-radio access environment are provided. One example method includes implementing radio resource management and a general link layer jointly across at least two radio access technology modules, and selecting one of the radio access technology modules to perform control signaling in a multi-radio environment. Similar and related example methods and example apparatuses are also provided. | 11-15-2012 |
20120294223 | Multicast Service - A method including sending a multicast packet to a cluster of recipients; receiving information indicating receiving status relating to the multicast packet from individual members of the cluster of recipients; and initiating intracluster retransmission of said multicast packet by sending to the cluster of recipients collective information about the receiving statuses of the members of the cluster of recipients. | 11-22-2012 |
20130012221 | EVOLVED NODE B CONTROLLED CENTRALIZED RESOURCE REUSE FOR DEVICE-TO-DEVICE AND CELLULAR USERS - Device-to-device (D2D) communication is one alternative to communication between devices through a radio access network. One interesting D2D communication method is reuse-mode D2D, where D2D nodes communicate with each other using the same uplink (UL) radio resource that is being used by some other cellular user equipment(s) (UEs). In other words, the UL cellular resources occupied by cellular UEs are reused by D2D nodes in their short-range communications. Centralized control of D2D communication can be performed by appropriate signaling between a D2D-capable UE and an evolved Node B (eNB). | 01-10-2013 |
20130128858 | RESOLUTION METHOD AND APPARATUS FOR SIMULTANEOUS TRANSMISSION AND RECEIVING CONTENTION IN A DEVICE-TO-DEVICE CELLULAR REUSE SYSTEM - According to one embodiment, a method for transmission/reception contention resolution in D2D communication is provided. The method includes detecting, at a device-to-device (D2D) node, re-usable cellular resources based on the scheduling information. The method also includes receiving related information from another D2D node identifying the re-usable cellular resources for the another D2D node, and identifying common and different re-usable cellular resources between the D2D node and the another D2D node. The method also includes receiving updated scheduling information, and determining, from the detected re-usable cellular resources, whether there is a simultaneous transmission/reception contention. When it is determined that there is a simultaneous transmission/reception contention, the method includes resolving the contention by dynamically selecting a direction of communication based on a preconfigured decision criteria, wherein the direction of communication is one of transmission or reception. | 05-23-2013 |
20140031054 | Methods and Apparatus of Spectrum Sharing for Cellular-Controlled Offloading Using Unlicensed Band - There are provided measures for spectrum sharing for cellular-controlled offloading using an unlicensed band. Such measures exemplarily comprise initiating an offloading of traffic from a cellular link on a cellular band to an unlicensed link on an unlicensed band, wherein the unlicensed link is synchronized with the cellular link, and sensing a channel on the unlicensed band in a symbol-synchronized sensing duration of at least one symbol length at the beginning of a predetermined subframe of the unlicensed band. | 01-30-2014 |
20140308954 | SWITCHING BETWEEN CELLULAR AND LICENSE-EXEMPT (SHARED) BANDS - A method and an apparatus for switching D2D data communications between a licensed and a license-exempt band are disclosed. A D2D device receives from a cellular network a pre-switch notification to prepare for a switch of its D2D communications, and in response adopts a temporary strategy for conducting its D2D transmissions prior to the switch. After the switch the D2D device discontinues the temporary strategy. In one embodiment the temporary strategy and its duration are indicated in the pre-switch notification. Two example temporary strategies are presented: ‘no-new-data’ where new data transmissions are suspended and data re-transmissions are sent with high reliability; and ‘no-feedback’ where new data is sent with high reliability and data re-transmissions are suspended. Different embodiments have the cellular network access node or D2D device contending for the radio resource in the license-exempt frequency band. | 10-16-2014 |
20140323177 | Apparatus and Method of Discontinuous Operation in LTE on Shared Band - An apparatus and a method is proposed, by which transmission operation is performed during a transmission on period and transmission operation is suspended during a transmission off period, wherein counting of at least one transmission related timer is suspended during the transmission off period. | 10-30-2014 |
20150065139 | HANDOVER CONTROL METHOD IN A WIRELESS ACCESS SYSTEM, RELAY STATION AND BASE STATION - The present invention provides a handover control method in a wireless access system, a relay station and a base station for performing handover control in a mobile multi-hop relay wireless access system such that the wireless access system is enabled to cover a wider area. To achieve the above object, the present invention provides a handover control method in a wireless access system, wherein the wireless access system comprises a mobile station and a base station, which receive and send message via a wireless channel, and further comprises a relay station for forwarding message from the mobile station and the base station under control of the base station, characterized in that the method comprising a relay station measure and arbitration step in which the relay station measures the message and arbitrates whether to relay the message, and a base station measure and handover step in which the base station measures the message and arbitrates whether to perform handover. | 03-05-2015 |