44results about How to "Reduce handover failures" patented technology

Method for handover problem identification in a mobile telecommunications system, the system including at least a first radio basestation, a second radio basestation and a mobile terminal able to communicate with said basestations, said mobile terminal is adapted to do a handover from the first basestation to the second basestation, the method including the steps of:

• • take at least one measure of a link quality between the terminal and any of the stations,
  • evaluate any measure of a link quality in regard of handover problem identification,

The invention is distinguished by:

in the step of taking the at least one measure, take said at least one measure of a link quality at an end of a successful handover execution of the mobile terminal from the first basestation to the second basestation. The invention also comprises a mobile terminal, a radio basestation and a management entity.

An operation method of a terminal, for a handover in a mobile communication system, may comprise performing measurement on beams of a target base station, and transmitting a measurement result of at least one beam of the target base station to a source base station; receiving, from the source base station, a handover command message including information on at least one RACH resource for the at least one beam; transmitting a handover indication message including information on at least one random access target beam having an order of channel conditions determined based on a latest measurement to the source base station and to the target base station through the source base station; and determining an optimal beam among the at least one random access target beam, and transmitting a RACH to the target base station through a RACH resource allocated to the optimal beam.

The embodiment of the present invention provides a method, device and system for reporting and configuring adjacent frequency points, and relates to the field of network technique. The method comprising: after receiving base-station-sent measurement request containing measurement frequency points and PCI, obtaining physical frequency by calculating measurement frequency points; obtaining an adjacent region with the physical frequency and PCI around a cell; obtaining CGI information and actual frequency points of the adjacent region; and sending reporting information containing CGI information and the actual frequency points to the base station to match the CGI information with the actual frequency points by the base station. By reporting the actual frequency points to match the CGI information with the actual frequency points by the base station, the method, device and system for reporting and configuring adjacent frequency points resolves the problem of switch failure or call dropping caused by configuration fault when the prior art configures adjacent region information to a service cell. So that adjacent region information configuration may be carried out correctly, and the probable of switch failure or call dropping is reduced.

A handover failure detection device (121) detects at least one of handover failure types regarding outgoing handover from a first cell (131) managed by a first base station (111) by observing: (a) presence/absence of reception by the first base station (111) of a handover completion notification regarding first handover of a mobile terminal (101) from the first cell (131) to a second cell (132) managed by a second base station (112); and (b) presence/absence of a request for connection re-establishment from the mobile terminal (101) to the first cell (131), the request occurring after initiation of the first handover. As a result, it contributes to improvement of handover failure detection or reduction of handover failure in a situation where exchange of information between at least some of base stations has been limited.

The method and the device for supporting group handover are disclosed. The method supporting group handover is provided, which is applied to UE in communication with network via a RN, including: a base station S-DeNB switching RN to a base station T-DeNB; and said S-DeNB switching UE served by said RN to said T-DeNB; wherein the MME serving said RN and the MME serving UE served by said RN are the same. Another embodiment of the present invention further provides a base station supporting group handover, The technical scheme set forth in the present invention can reduce unnecessary signaling procedure, the possibility of network congestion, and can reduce the signaling procedure of handover when group handover occurs, so as to reduce the failure of the handover process and ensure the continuity of service.

The invention provides a method, a device and a system for adjusting the coverage area of a base station. The method for adjusting the coverage area of the base station comprises the following steps of: acquiring a throughput rate of a sector; if the throughput rate of the sector is more than or equal to a heavy load threshold, acquiring a step value for adjusting downtilt or a transmitting power of an antenna of the sector according to signal quality data which is reported to the sector when a terminal switches the base state or according to a pre-stored reference data table; sending a first adjustment command which carries the step value to the base station to which the sector belongs, so that the base station can adjust the downtilt or the transmitting power of the antenna of the sector according to the step value after receiving the first adjustment command, and the coverage area of the base station is adjusted. By the method, the device and the system, the size of a coverage overlapping area of the base station and an adjacent base station is guaranteed, so that terminals which are positioned in the coverage overlapping area can enjoy normal voice service and data service, the phenomenon of unsuccessful switching or ping-pong switching is avoided, and the communication quality of the terminals in the coverage overlapping area is improved.

A handover failure detection device (121) detects at least one of handover failure types regarding outgoing handover from a first cell (131) managed by a first base station (111) by observing: (a) presence/absence of reception by the first base station (111) of an acknowledgment response to a handover command regarding first handover of a mobile terminal (101) from the first cell (131) to a second cell (132) managed by a second base station (112); and (b) presence/absence of a request for connection re-establishment from the mobile terminal (101) to the first cell (131), the request occurring after initiation of the first handover. As a result, it contributes to improvement of handover failure detection or reduction of handover failure in a situation where exchange of information between base stations is restricted.

A wireless terminal includes a data transmitting/receiving function and a handover control section. The handover control section scans channels to detect the existence or non-existence of the handover destination candidate on all available wireless channels. The handover control section acquires the handover destination candidate, by scanning the existence or non-existence of the handover destination in advance before handover execution. The verification scan is carried out to check whether or not the candidate is in a communicable area with the terminal. Then, based on the execution result of the verification scan, it performs a handover.

A method supporting group handover, which is applied to a User Equipment (UE) in communication with a network via a Relay Node (RN), is provided. The method includes a base station (e.g., an S-DeNB) hands over an RN to a base station (e.g., a T-DeNB) and the S-DeNB hands over the UE served by the RN to the T-DeNB, wherein the handovers are performed simultaneously or separately. The various embodiments of the present disclosure provide a base station supporting group handover. The technical scheme set forth in the present disclosure can reduce an unnecessary signaling procedure, the possibility of network congestion, and can reduce the signaling procedure of handover when group handover occurs, so as to reduce the failure of the handover process and enhance the continuity of service.

The invention provides a network switching control method and a base station. The method comprises the steps that the base station controls first terminal equipment to fall back to a 2G or 3G network from an LTE network to carry out first circuit domain CS, the base station determines the fact that the first terminal equipment completes the first CS and then determines whether second CS to be established corresponding to the first terminal equipment exists or not, the base station controls the first terminal equipment to stay in the 2G or 3G network to wait for the second CS if the second CS exists, and the base station controls the first terminal equipment to switch back to the LTE network if the second CS does not exist. The network switching control method and the base station can reduce the number of switching times of the terminal between the 2G/3G network and the LTE network, and thus reduce the burden of the network side.

A memory includes a number of partitions, each assigned to a respective terminal, each including a first number of subpartitions of a first type, each assigned to a respective cell visited by the respective terminal. The memory includes second number of subpartitions of a second type, each assigned to a respective transition of a terminal between respective cells Upon each transition of a respective terminal between respective cells, data is received pertaining to the respective terminal from a network entity(les) representing a respective cell. Responsive thereto, in each subpartition of the first type, statistical information is stored that pertains to the terminal in relation to that cell In each subpartition of the second type, information is stored that pertains to the respective transition of the terminal. It Apparatuses as well as respective related methods, and computer program products are disclosed.

The embodiment of the invention relates to the technical field of wireless communication, in particular to a method and equipment for adjusting the priority of resources, aiming at solving the problems of handover failure and call drop caused by strong same-frequency and same time slot interference possibly in the switching process because strong interference easily exists in uplink resources of a standby target in the scheme of determining resource priority in the prior art. The method in the embodiment of the invention comprises the following steps of: determining a first interference power value of each same-frequency neighbor cell to each time slot of the cell; and adjusting the time slot priority determined by SDCA (Synchronization Data Communication adapter)-based power measurement according to the determined first interference power value. The strong interference is considered in the adjustment of the resource priority, so that the possibility that the strong interference exists in the uplink resources of the standby target is reduced, further the frequencies of handover failure and call drop due to same-frequency and same time slot interference are reduced and the handover performance is improved.