Method of broadcasting and receiving neighboring base station advertisement message in broadband wireless access system, and handover method using the same
First Claim
1. A method of broadcasting in a serving base station of a wideband wireless access system, the method comprising:
- exchanging information with neighboring base stations to confirm whether frequency overlay is supported in each of the neighboring base stations;
generating a neighboring base station advertisement message that includes indicators identifying whether frequency overlay is supported in the neighboring base stations, the indicators comprised in a type length value (TLV) parameter of the neighboring base station advertisement message; and
broadcasting the generated neighboring base station advertisement message to terminals that belong to a coverage area of the serving base stations;
wherein each indicator in the neighboring base station advertisement message has a first value for the neighboring base stations that support frequency overlay and a second value for the neighboring base stations that do not support frequency overlay.
2 Assignments
0 Petitions
Accused Products
Abstract
The present invention relates to a method of broadcasting and receiving a neighboring base station advertisement message in a wideband wireless access system and a handover method using the same. In the present invention, a base station broadcasts a neighboring base station advertisement message including information that indicates that frequency overlay is supported in neighboring base stations to terminals. The terminal confirms whether frequency overlay is supported in the neighboring base stations included in the neighboring base station advertisement message, and can perform handover to a frequency overlay supporting base station as a destination base station. According to the present invention, when a non-frequency overlay communication system and a frequency overlay communication system are mixed with each other, it is possible to ensure that a frequency overlay supporting terminal performs handover from a base station of a frequency overlay communication system to a base station of another frequency overlay communication system.
14 Citations
20 Claims
-
1. A method of broadcasting in a serving base station of a wideband wireless access system, the method comprising:
-
exchanging information with neighboring base stations to confirm whether frequency overlay is supported in each of the neighboring base stations; generating a neighboring base station advertisement message that includes indicators identifying whether frequency overlay is supported in the neighboring base stations, the indicators comprised in a type length value (TLV) parameter of the neighboring base station advertisement message; and broadcasting the generated neighboring base station advertisement message to terminals that belong to a coverage area of the serving base stations; wherein each indicator in the neighboring base station advertisement message has a first value for the neighboring base stations that support frequency overlay and a second value for the neighboring base stations that do not support frequency overlay. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A method of receiving in a terminal of a wideband wireless access system, the method comprising:
-
receiving a neighboring base station advertisement message broadcast from a serving base station, the neighboring base station advertisement message including indicators identifying whether frequency overlay is supported in neighboring base stations, the indicators comprised in a type length value (TLV) parameter of the neighboring base station advertisement message; confirming whether frequency overlay is supported for each of the neighboring base stations identified in the neighboring base station advertisement message; and storing information that indicates whether frequency overlay is supported in each of the neighboring base stations; wherein each indicator in the neighboring base station advertisement message has a first value for the neighboring base stations that support frequency overlay and a second value for the neighboring base stations that do not support frequency overlay. - View Dependent Claims (7, 8)
-
-
9. A handover method in which a serving base station of a wideband wireless access system performs handover, the handover method comprising:
-
broadcasting a neighboring base station advertisement message including indicators identifying whether frequency overlay is supported in neighboring base stations, the indicators comprised in a type length value (TLV) parameter of the neighboring base station advertisement message; receiving a list of candidate base stations where handover is possible from a terminal, the candidate base stations being selected based on the indicators included in the broadcast neighboring base station advertisement message and network information of neighboring base station by measuring quality of downlink signals received from the neighboring base stations; transmitting handover information of the terminal to the candidate base stations, wherein the handover information includes information indicating whether the terminal can use non-adjacent frequency bands; selecting a recommended base station from among the candidate base stations and transmitting information of the recommended base station to the terminal; and receiving a handover instruction from the terminal; wherein each indicator in the neighboring base station advertisement message has a first value for the neighboring base stations that support frequency overlay and a second value for the neighboring base stations that do not support frequency overlay. - View Dependent Claims (10, 11)
-
-
12. A handover method in which a terminal of a wideband wireless access system performs handover, the method comprising:
-
receiving a neighboring base station advertisement message that is broadcast from a serving base station, the neighboring base station advertisement message including a list of neighboring base stations and indicators identifying whether frequency overlay is supported in the neighboring base stations, the indicators comprised in a type length value (TLV) parameter of the neighboring base station advertisement message; measuring quality of downlink signals received from the neighboring base stations and acquiring network information of neighboring base stations; selecting candidate base stations for the handover from among the neighboring base stations based on the indicators and the network information of neighboring base stations; transmitting a list of the selected candidate base stations to the serving base station; selecting one destination base station from among a list of recommended base stations received from the serving base station and instructing the serving base station to perform handover; and performing handover to the destination base station that previously knew whether the terminal can use non-adjacent frequency bands based on handover information transmitted from the serving base station before performing the handover; wherein each indicator in the neighboring base station advertisement message has a first value for the neighboring base stations that support frequency overlay and a second value for the neighboring base stations that do not support frequency overlay. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
-
Specification