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US 6,714,785 B1Granted
Handoff device and method for mobile communication system
AssigneeSamsung Electronics Co., Ltd.
InventorChung-Seok Han
Life of this patent
Estimating the term…
Abstract
A device for performing a handoff in a mobile communication system. A mobile station transmits a handoff request message including a measured signal power value and information about a traveling direction thereof, when signal power from an adjacent base station is higher than a threshold. A base station performs a handoff depending on the signal power and the traveling direction, upon receipt of the handoff request message.
Claims22
A device for performing a handoff in a mobile communication system, including a mobile station, a service base station and a plurality of adjacent base stations, the device comprising:
- a searcher for measuring power of received signals from the plurality of adjacent base stations, the received signals corresponding to respective PN phases within a range of a given search window;
- a maximum energy detector for detecting out of the measured received signals those signals having a higher power than a threshold level, and determining a search window index corresponding to a first received signal out of the detected received signals;
- and
- a controller for generating location information and direction information of a mobile station according to the determined search window index, and making a handoff request message including the generated location information and direction information;
- wherein the location information is generated according to a location of the determined search window index relative to a center index corresponding to a center of the search window.
2 more elements
A device for performing a handoff in a mobile communication system, comprising:
- a mobile station for determining a search window index corresponding to a first received signal out of a plurality of signals received from an adjacent base station, the received signals being searched within a range of a given search window and having a higher power than a predetermined level, and generating location information and direction information of the mobile station according to the determined search window index to make a handoff request message;
- and
- a base station for receiving the handoff request message to analyze the location information and direction information, and performing a handoff according to the analyzed location information and direction information;
- wherein the base station determines a location and a traveling direction of the mobile station according to the analyzed location information, and assigns a priority according to the location and the traveling direction of the mobile station.
1 more element
A method for performing a handoff in a mobile communication system, comprising the steps of:
- determining a search window index corresponding to a first received signal out of a plurality of signals received from an adjacent base station, the received signals being measured within a range of a given search window and having a higher power than a predetermined level;
- generating location information of the mobile station according to the determined search window index;
- generating direction information of the mobile station according to the determined search window index and a previously determined search window index;
- and
- making a handoff request message including the generated location information and direction information, and providing the handoff request message to a base station;
- wherein the location information is generated according to a location of the determined search window index relative to a center index corresponding to a center of the search window.
3 more elements
A method for performing a handoff in a mobile communication system, comprising the steps of:
- receiving a handoff request message from a mobile station and determining whether an adjacent base station has sufficient spare channels;
- analyzing, when the adjacent base station has insufficient spare channels, location information and direction information included in the handoff request message and performing a handoff according to the analyzed location information and direction information;
- determining a location of the mobile station based on the analyzed location information;
- determining a traveling direction of the mobile station based on the analyzed direction information;
- and
- assigning a priority according to the determined location and traveling direction of the mobile station and performing a handoff according to the priority.
3 more elements
A method for performing a handoff in a mobile communication system, comprising the steps of:
- determining a search window index corresponding to a first received signal out of a plurality of signals received from an adjacent base station, the received signals being searched within a range of a given search window and having a higher power than a predetermined level, and generating location information and direction information of the mobile station according to the determined search window index to make a handoff request message;
- and
- receiving the handoff request message to analyze location information and direction information, and performing a handoff according to the analyzed location information and direction information;
- wherein the location information is generated according to a location of the determined search window index relative to a center index corresponding to a center of the search window.
1 more element
Dependencies are inferred from the claim text.