Abstract
Disclosed is a method for enabling a mobile station existing in a serving cell area to perform a handover procedure in a broadband mobile communication system including the mobile station a serving base station providing a service to the mobile station and one or more target base stations containing at least one target cell area overlapping with the serving cell area occupied by the serving base station. The method includes transmitting a handover request message from the mobile station to the serving base station when it is detected that a performance of a handover is necessary; and transmitting a handover indication message containing handover cancel information to the serving base station when the mobile station determines a cancel of the handover while the mobile station is being handed over to one or more target base stations by the serving base station.
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Specification Information
Specification Information
Technologies
Family Information
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| Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
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| Declaration Date | Declaration Reference | Declaring Company | Specification Information | |||||||||
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Technologies
Resource configuration Mobility and handover
Product
User Equipment (UE/Terminal)Base Station (eNB/gNB)
Use Cases
Wireless communication
Services
Mobility Management
Claim
1. A method for performing a handover by a mobile station in a communication system, the method comprising:
transmitting a handover request message to a serving base station when it is detected that a handover is necessary;
receiving a first handover response message, from the serving base station, including a list of at least one neighbor base station capable of providing a service to the mobile station in response to the handover request message;
transmitting a handover indication message including handover rejection information to the serving base station when the mobile station determines to reject the handover after receiving the first handover response message; and
receiving a second handover response message, from the serving base station, including a new list of at least one neighbor base station capable of providing the service to the mobile station after transmitting the handover indication message,
wherein the handover rejection information indicates the mobile station intends to reject performing the handover with any neighbor base station in the list in the first handover response message, and to receive the new list that is different from the list in the first handover response message;
wherein a predetermined handover indicator type field in the handover indication message includes the handover rejection information represented by two bits, which is chosen from among at least three values for the handover indicator type field, each of the three values indicating either a connection release with the serving base station, a handover cancel or the handover rejection information; and
wherein the value representing the connection release with the serving base station indicates that the mobile station intends to release a link currently setup with the serving base station, and the value representing the handover cancel indicates that the mobile station intends to cancel the handover and resume communication with the serving base station.', 'transmitting a handover request message to a serving base station when it is detected that a handover is necessary;', 'receiving a first handover response message, from the serving base station, including a list of at least one neighbor base station capable of providing a service to the mobile station in response to the handover request message;', 'transmitting a handover indication message including handover rejection information to the serving base station when the mobile station determines to reject the handover after receiving the first handover response message; and', 'receiving a second handover response message, from the serving base station, including a new list of at least one neighbor base station capable of providing the service to the mobile station after transmitting the handover indication message,', 'wherein the handover rejection information indicates the mobile station intends to reject performing the handover with any neighbor base station in the list in the first handover response message, and to receive the new list that is different from the list in the first handover response message;', 'wherein a predetermined handover indicator type field in the handover indication message includes the handover rejection information represented by two bits, which is chosen from among at least three values for the handover indicator type field, each of the three values indicating either a connection release with the serving base station, a handover cancel or the handover rejection information; and', 'wherein the value representing the connection release with the serving base station indicates that the mobile station intends to release a link currently setup with the serving base station, and the value representing the handover cancel indicates that the mobile station intends to cancel the handover and resume communication with the serving base station.
2. The method as claimed in claim 1, further comprising:
receiving a scanning permission message for scanning a carrier to interference and noise ratio (CINR) of the neighbor base stations from the serving base station; and
scanning the CINR of the neighbor base stations in response to the scanning permission message, and storing information on the CINR of the neighbor base stations according to a result of the scanning.', 'receiving a scanning permission message for scanning a carrier to interference and noise ratio (CINR) of the neighbor base stations from the serving base station; and', 'scanning the CINR of the neighbor base stations in response to the scanning permission message, and storing information on the CINR of the neighbor base stations according to a result of the scanning.
3. The method as claimed in claim 1, wherein it is detected that the handover is necessary when a carrier to interference and noise ratio (CINR) of the serving base station is less than a first threshold value.
4. The method as claimed in claim 1, wherein it is detected that the handover is necessary when a carrier to interference and noise ratio (CINR) of the serving base station is less than a CINR of a selected one of the neighbor base stations.
5. The method as claimed in claim 1, further comprising:
retransmitting the handover request message after transmitting the handover indication message.', 'retransmitting the handover request message after transmitting the handover indication message.
6. A method for performing a handover by a serving base station in a communication system, the method comprising:
receiving, from a mobile station, a handover request message;
transmitting, to the mobile station, a first handover response message including a list of at least one neighbor base station capable of providing a service to the mobile station in response to the handover request message;
receiving, from the mobile station, a handover indication message including handover rejection information; and
transmitting, to the mobile station, a second handover response message including a new list of at least one neighbor base station capable of providing the service to the mobile station after receiving the handover indication message;
wherein the handover rejection information indicates the mobile station intends to reject performing the handover with any neighbor base station in the list in the first handover response message, and to receive the new list that is different from the list in the first handover response message;
wherein a predetermined handover indicator type field in the handover indication message includes the handover rejection information represented by two bits, which is chosen from among at least three values for the handover indicator type field, each of the three values indicating either a connection release with the serving base station, a handover cancel or the handover rejection information; and
wherein the value representing the connection release with the serving base station indicates that the mobile station intends to release a link currently setup with the serving base station, and the value representing the handover cancel indicates that the mobile station intends to cancel the handover and resume communication with the serving base station.', 'receiving, from a mobile station, a handover request message;', 'transmitting, to the mobile station, a first handover response message including a list of at least one neighbor base station capable of providing a service to the mobile station in response to the handover request message;', 'receiving, from the mobile station, a handover indication message including handover rejection information; and', 'transmitting, to the mobile station, a second handover response message including a new list of at least one neighbor base station capable of providing the service to the mobile station after receiving the handover indication message;', 'wherein the handover rejection information indicates the mobile station intends to reject performing the handover with any neighbor base station in the list in the first handover response message, and to receive the new list that is different from the list in the first handover response message;', 'wherein a predetermined handover indicator type field in the handover indication message includes the handover rejection information represented by two bits, which is chosen from among at least three values for the handover indicator type field, each of the three values indicating either a connection release with the serving base station, a handover cancel or the handover rejection information; and', 'wherein the value representing the connection release with the serving base station indicates that the mobile station intends to release a link currently setup with the serving base station, and the value representing the handover cancel indicates that the mobile station intends to cancel the handover and resume communication with the serving base station.', '7. The method as claimed in claim 6, further comprising:
receiving the handover request message from the mobile station, after receiving the handover indication message.', 'receiving the handover request message from the mobile station, after receiving the handover indication message.', '8. The method as claimed in claim 6, further comprising transmitting, to the mobile station, a scanning permission message for scanning a carrier to interference and noise ratio (CINR) of the neighbor base stations.', '9. A system for performing a handover in a communication system, comprising: a mobile station for transmitting a handover request message to a serving base station when it is detected that a handover is necessary, receiving a first handover response message, from the serving base station, including a list of at least one neighbor base station capable of providing a service to the mobile station in response to the handover request message, transmitting a handover indication message including handover rejection information to the serving base station when the mobile station determines to reject the handover after receiving the first handover response message, and receiving a second handover response message, from the serving base station, including a new list of at least one neighbor base station capable of providing the service to the mobile station after transmitting the handover indication message, wherein the handover rejection information indicates the mobile station intends to reject performing the handover with any neighbor base station in the list in the first handover response message, and to receive the new list that is different from the list in the first handover response message; wherein a predetermined handover indicator type field in the handover indication message includes the handover rejection information represented by two bits, which is chosen from among at least three values for the handover indicator type field, each of the three values indicating, either a connection release with the serving base station, a handover cancel or the handover rejection information; and wherein the value representing the connection release with the serving base station indicates that the mobile station intends to release a link currently setup with the serving base station, and the value representing the handover cancel indicates that the mobile station intends to cancel the handover and resume communication with the serving base station.', '10. The system as claimed in claim 9, wherein the mobile station receives a scanning permission message for scanning a carrier to interference and noise ratio (CINR) of neighbor base stations from the serving base station, and scans the CINR of the neighbor base stations in response to the scanning permission message, and storing information on the CINR of the neighbor base stations according to a result of the scanning.', '11. The system as claimed in claim 9, wherein it is detected that the handover is necessary when a carrier to interference and noise ratio (CINR) of the serving base station is less than a first threshold value.', '12. The system as claimed in claim 9, wherein it is detected that the handover is necessary when a carrier to interference and noise ratio (CINR) of the serving base station is less than a CINR of a selected one of the neighbor base stations.', '13. The system as claimed in claim 9, wherein the mobile station retransmits the handover request message after transmitting the handover indication message.', '14. A system for performing a handover in a communication system, comprising: a serving base station for receiving, from a mobile station, a handover request message, transmitting, to the mobile station, a first handover response message including a list of at least one neighbor base station capable of providing a service to the mobile station in response to the handover request message, receiving, from the mobile station, a handover indication message including handover rejection information, and transmitting, to the mobile station, a second handover response message including a new list of at least one neighbor base station capable of providing the service to the mobile station after receiving the handover indication message, wherein the handover rejection information indicates the mobile station intends to reject performing the handover with any neighbor base station in the list in the first handover response message, and to receive the new list that is different from the list in the first handover response message; wherein a predetermined handover indicator type field in the handover indication message includes the handover rejection information represented by two bits, which is chosen from among, at least three values for the handover indicator type field, each of the three values indicating either a connection release with the serving base station, a handover cancel or the handover rejection information; and wherein the value representing; the connection release with the serving base station indicates that the mobile station intends to release a link currently setup with the serving base station, and the value representing the handover cancel indicates that the mobile station intends to cancel the handover and resume communication with the serving base station.', '15. The system as claimed in claim 14, wherein the serving base station transmits, to the mobile station, a scanning permission message for scanning a carrier to interference and noise ratio (CINR) of neighbor base stations.', '16. The system as claimed in claim 14, wherein the serving base station receives the handover request message from the mobile station, after receiving the handover indication message.']
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SUMMARY
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The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)
The information in grey was provided by the patent holder
The information in purple was extracted from the FrandAvenue
Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
Family member:related patents or applications that share a common priority or original filing.