Patent application number | Description | Published |
20120063425 | Method and Apparatus for Uplink Synchronization Control - The present invention discloses a method for uplink synchronization control, wherein network side and a user equipment (UE) maintain a timing alignment timer (TAT) for the UE, and maintain an uplink transmission timing adjustment amount for uplink component carriers, and the method includes following steps: the network side measuring uplink component carriers of the UE, and obtaining an uplink transmission TA amount of the uplink component carriers; and before the TAT expires, the network side transmitting to the UE an adjustment command comprising information of the uplink transmission TA amount for at least one of the uplink component carriers of the UE. Also disclosed in the embodiments of the present invention are a method for uplink synchronization control at the UE side, and a base station and a UE for implementing the above methods. The solution of the present invention enables accurate adjustment of the uplink synchronization for each component carrier in a carrier aggregation mechanism. | 03-15-2012 |
20120142361 | Method, Device and System for Reconfiguring Aggregation Cell - The present invention provides a method for reconfiguring an aggregated cell, which includes that: a network side device judges whether the aggregated cell of a user equipment (UE) needs to be changed in the cell set in which the carriers can be aggregated; when the judgment result is that the change is needed, the network side device transmits a radio resource control (RRC) connection reconfiguration message to the UE, and the RRC connection reconfiguration message carries the change information of the aggregated cell of the UE; the UE receives the RRC connection reconfiguration message, and reconfigures the aggregated cell according to the RRC connection reconfiguration message. In the present invention, for the LTE-A system, when the aggregated cell of UE which supports the carrier aggregation changes within the same cell set in which the carriers can be aggregated, the aggregated cell of the UE can be reconfigured; and the same access stratum (AS) key is used to perform the security processing procedure for the data, which enables the uninterrupted transmission for the data. | 06-07-2012 |
20120147755 | METHOD AND DEVICE FOR JUDGING RADIO LINK FAILURE IN CARRIER AGGREGATION TECHNOLOGY - The present invention discloses a method and device for judging Radio Link Failure (RLF) in Carrier Aggregation (CA) technology, which are used to effectively judge whether a radio link is failed or not in CA technology. Said method comprises: on an evaluation point, comparing the determined radio link quality parameter of each carrier participating in the RLF judgement with the corresponding radio link quality parameter threshold, determining whether to trigger an in-sync indication or out-of-sync indication on the evaluation point, and judging whether the radio link of the User Equipment (UE) is failed according to the number of the continuously received in-sync indications or out-of-sync indications. The embodiment of the present invention determines whether to trigger an in-sync indication or out-of-sync indication by comparing the radio link quality parameters of the carriers participating in the RLF judgement with the corresponding radio link quality parameter thresholds, and thereby judges that whether the radio link is failed or not in CA technology. | 06-14-2012 |
20120218988 | METHOD, APPARATUS AND SYSTEM FOR UPLINK SYNCHRONIZATION - A method, an apparatus and a system for uplink synchronization are disclosed by the embodiment of the invention. The method includes the following steps: a network equipment configures multi-carrier operation mode for a user equipment and obtains the timing advance TA group message corresponding to each of component carrier CC of the user equipment; the network equipment maintains the TA timer of each TA group according to the TA group information to be uplink synchronized with the user equipment. The embodiment of the invention provides the establishment and maintenance mechanism for uplink synchronization in the case that the timing advance of each component carrier CC is different in the multi-carrier system. | 08-30-2012 |
20130176923 | Methods for Requesting and Responding to Multimedia Broadcast Multicast Service (MBMS) Counting - Disclosed is a method for requesting and feeding back a multimedia broadcast multicast service (MBMS) state, the method being used for allowing a network side to inform a related user equipment (UE) to feed back MBMS state information and allowing the informed UE to feed back the MBMS state information. The request method comprises: when necessary to acquire the receiving state of an MBMS, a base station transmits, through a physical downlink control channel (PDCCH) scrambled by a radio network temporary identifier (RNTI) belonging specially to an MBMS service, or through a system message, a multicast control channel (MCCH) change notification to the UE; and the base station transmits an MBMS state report request to the UE through the changed MCCH. The present invention also discloses a device for implementing the method. | 07-11-2013 |
20130182640 | FEEDBACK METHOD AND DEVICE FOR HEADER COMPRESSION FEEDBACK INFORMATION - The present invention discloses a feedback method and device for header compression feedback information: After RN is introduced in LTE-A system, user data transmitted at Un interface possesses a complex header structure with nesting double-IP containing GTP. Through application of the technical solution put forward by the embodiments of the present invention, different types of header compression feedback information carried in control PDU can be analyzed and processed with corresponding strategies according to the information in control PDU, thus effectively realizing separate compression and feedback for double headers and improving data transmission efficiency at Un interface. | 07-18-2013 |
20140044074 | RANDOM ACCESS METHOD AND APPARATUS BASED ON MULTIPLE UPLINK TIMING ADVANCES - Disclosed are a random access method and apparatus based on multiple uplink timing advances. The method includes: when acquiring that a user equipment has multiple uplink timing advances, initiating, by a network side, for the user equipment a random access on a designated carrier of a secondary cell. According to the examples, random access in the SCell can be realized in scenarios that multi-TA is maintained. | 02-13-2014 |
20140050138 | METHOD AND APPARATUS FOR HANDING OVER DEVICE - Disclosed in the present invention are a method and apparatus for handing over device, and belongs to the field of mobile communication. The method comprises: obtaining the Multimedia Broadcast Multicast Service (MBMS) service reception information of the device; according to the MBMS service reception information, selecting a target cell supporting the MBMS service for the device; handing over the device to the target cell. The apparatus comprises: an acquiring module, for obtaining the MBMS service reception information of the device; a selection module, for selecting a target cell supporting the MBMS service for the device according to the MBMS service reception information; a handing over module, for handing over the device to the target cell. By the implementation of the technical solution that selecting a target cell supporting the MBMS service for the device according to the MBMS service reception information, and switching the device to the target cell, the present invention guarantees the continuity of the MBMS service during the handover process of the device. | 02-20-2014 |
20140233535 | UPLINK TRANSMISSION METHOD AND APPARATUS IN CARRIER AGGREGATION SYSTEM - The invention discloses an uplink transmission method and apparatus in a carrier aggregation system and relates to the field of radio communications so as to address the issue of how to perform uplink transmission in a secondary cell when a base station configures a user equipment additionally with the secondary cell. In the invention, a user equipment selects, under a preset reference carrier selection rule, one of downlink carriers corresponding to cells having already eatablished downlink synchronization with a base station as a timing reference downlink carrier used by a secondary cell after the base station configures the user equipment additionally with the secondary cell; and the user equipment performs uplink transmission in the secondary cell according to downlink timing of the timing reference downlink carrier. With the invention, a timing reference downlink carrier used by an additionally configured secondary cell in uplink transmission can be determined and uplink transmission can be further preformed over the timing reference downlink carrier. | 08-21-2014 |
20150023243 | MBMS SERVICE RECEPTION AND ABILITY TRANSMISSION METHOD AND DEVICE - The present disclosure discloses an MBMS service reception and capability transmission method and device. In this method, the terminal device may send the information of the MBMS service of interest of the terminal device or the information of the MBMS service, which is being received, to the network device and the MBMS service reception capability information of the terminal device via a message. If an MBMS frequency point corresponding to the MBMS service of interest of the terminal device or the MBMS frequency point corresponding to the MBMS service, which is being received, is within a reception capability scope of the terminal device in a current configuration, the message reported by the terminal device to the network device includes: the MBMS frequency point. | 01-22-2015 |
20150055488 | METHOD AND DEVICE FOR JUDGING RADIO LINK FAILURE IN CARRIER AGGREGATION TECHNOLOGY - The present invention discloses a method and device for judging Radio Link Failure (RLF) in Carrier Aggregation (CA) technology, which are used to effectively judge whether a radio link is failed or not in CA technology. Said method comprises: on an evaluation point, comparing the determined radio link quality parameter of each carrier participating in the RLF judgement with the corresponding radio link quality parameter threshold, determining whether to trigger an in-sync indication or out-of-sync indication on the evaluation point, and judging whether the radio link of the User Equipment (UE) is failed according to the number of the continuously received in-sync indications or out-of-sync indications. The embodiment of the present invention determines whether to trigger an in-sync indication or out-of-sync indication by comparing the radio link quality parameters of the carriers participating in the RLF judgement with the corresponding radio link quality parameter thresholds, and thereby judges that whether the radio link is failed or not in CA technology. | 02-26-2015 |