IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0325825
(2002-12-23)
|
등록번호 |
US-7346351
(2008-03-18)
|
우선권정보 |
KR-2001-82709(2001-12-21) |
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
2 |
초록
▼
A mobile communication system and a method of processing a handoff for the same is disclosed. A gateway control station performs matching of two system regions for a handoff process between the two system regions, and matches gateway base stations. The gateway base station uses respective primary fr
A mobile communication system and a method of processing a handoff for the same is disclosed. A gateway control station performs matching of two system regions for a handoff process between the two system regions, and matches gateway base stations. The gateway base station uses respective primary frequencies among frequencies used in terminal base stations of the two systems which are located in a boundary region between the two system regions as common used frequencies, and controls a handoff cell which is defined as at least a portion of two cell sectors that belong to the two base stations and which uses the two common frequencies.
대표청구항
▼
What is claimed is: 1. A mobile communication system comprising: a first communication system configured with a first mobile switching center and a second communication system configured with a second mobile switching center that each use different frequency groups, respectively; a gateway control
What is claimed is: 1. A mobile communication system comprising: a first communication system configured with a first mobile switching center and a second communication system configured with a second mobile switching center that each use different frequency groups, respectively; a gateway control station for performing matching of the first and second communication systems for a handoff process between the two systems, wherein the gateway control station is connected to base station controllers respectively connected to the first and second mobile switching centers; and a gateway base station connected to the gateway control station for using respective primary frequency groups of first and second terminal base stations of the first and second communication systems, respectively, and controlling a handoff cell defined as at least a portion of two sectors that respectively belong to the two base stations of the two systems, wherein the handoff between the first communication system and the second communication system is a multiple stage process. 2. The system of claim 1, wherein one portion of the handoff cell includes a portion of the cell that belongs to the first system, and another portion of the handoff cell includes a portion of the cell that belongs to the second system. 3. The system of claim 2, wherein the two portions of the handoff cell are overlapped with a same signal strength from antennas. 4. The system of claim 3 wherein the antennas are omnidirectional antennas. 5. The system of claim 3, wherein the two portions are substantially overlapped and have substantially a same radii. 6. The system of claim 1, wherein the handoff between the two systems includes the multiple stage processes of intra-cell hard handoff to a primary frequency of the first base station, a first soft handoff at least one of an inter-frequency hard handoff and an inter-sector hard handoff, and a second soft handoff to a primary frequency of the second base station. 7. A method of processing a handoff in a mobile communication system, comprising: arranging a gateway control station that accommodates all standards of a network provider region A using frequency groups Fa and a network provider region B using frequency groups Fb and a gateway base station that matches the communication channels of the gateway control station in a boundary area of the provider regions A and B, wherein the frequency groups Fa and Fb do not overlap; defining a handoff cell belonging to the gateway station by overlapping sectors belonging to respective base stations of the provider region A and the provider region B, wherein the sectors are overlapped with a same signal strength using an omni directional antenna; selecting a primary frequency group Fa-1 of the frequency groups Fa and a primary frequency group Fb-1 of the frequency groups Fb as frequency groups commonly used by the gateway base station; and processing a handoff in multiple stages that includes a soft handoff and a hard handoff when a mobile station moves from a sector of one of the regions A and B to a sector of the other of the regions passing through the handoff cell. 8. The method of claim 7, wherein the gateway base station includes a handoff function between the sectors and a handoff function between the frequency groups during a handoff control operation. 9. The method of claim 8, wherein the multistage handoff procedure includes sequential processes of intra-cell hard handoff to the primary frequency group Fa-1, a first soft handoff, at least one of an inter-frequency hard handoff and an inter-sector hard handoff, and a second soft handoff to the primary frequency group Fb-1. 10. The method of claim 7, further comprising: if a number of calls using the primary frequency Fb-1 in the provider region B is greater than that of other calls using frequency groups, performing an intra-cell hard handoff of the calls from the primary frequency Fb-1 to one of the other frequency groups used in the provider region B. 11. The method of claim 7, wherein the first and second network provider regions A and B are respectively controlled by different mobile switching centers. 12. A method of processing a handoff in a mobile communication system, comprising: performing an intra-cell handoff of a call in a first communication system using first frequency groups when a first sector of a first terminal base station of the first system is included in an active set; performing a first soft handoff of the call from the first sector to one portion of a handoff cell that is defined as at least a portion of two sectors that respectively belong to a first base station of the first system and a second base station of a second communication system using second frequency groups different from the first frequency groups when the one portion of the handoff cell is added in the active set; performing at least one of an inter-frequency handoff and inter-sector handoff of the call from the one portion to an other portion of the handoff cell, when the first sector is dropped in the active set; and performing a second soft handoff of the call from the other portion of the handoff cell to a second sector of a second terminal base station of the second system, when the second base station is added in the active set to complete a transfer from the first to the second system. 13. The method of claim 12, further comprising: if a number of calls using a predetermined frequency group of the second system is greater than that of other calls using frequency groups, performing an intra-cell handoff of the call from the predetermined frequency group to one of the other frequency groups used in the second system. 14. The method of claim 12, wherein the first and second communication systems use different mobile switching centers. 15. A mobile communication system comprising: a controller for matching communication channels of at least two communication system regions respectively controlled by first and second different mobile switching centers and enabling handoff between the regions; a base station coupled in a boundary area of the at least two communication regions wherein said base station manages at least one sector of the boundary area and communicates with at least one base station located in one communication region and communicates with another base station located in another communication region; and the base station coupled in the boundary area communicates with the other base stations at a common frequency or frequencies and controls handoff between the other base stations in a handoff cell which is defined as at least a portion of two cell sectors that belong to the at least two base stations and uses the common frequency or frequencies. 16. The system of claim 15, wherein the base station coupled in the boundary area is a gateway base station. 17. A method of processing a handoff in a mobile communication system comprising: arranging a gateway control station that supports communication between network provider region A and a network provider region B and a gateway base station that matches the gateway control station in a boundary area of the provider regions A and B; defining a handoff cell assigned to the gateway control station by overlapping sectors that are serviced by base stations in provider regions A and B, wherein the sectors that are overlapped are provided with a same signal strength; selecting at least two primary frequency groups supported by the gateway base station; and processing a handoff in multiple stages that includes at least one soft handoff and at least one hard handoff when a mobile station moves from a sector of one of the regions A and B to a sector of the other of the regions passing through the handoff cell, and wherein first and second network provider regions A and B are respectively controlled by different mobile switching centers. 18. The method of claim 17, wherein the handoff between the two systems includes sequential processes of intra-cell hard handoff to a primary frequency of the first base station, a first soft handoff at least one of an inter-frequency hard handoff and an inter-sector hard handoff, and a second soft handoff to a primary frequency of the second base station. 19. The method of claim 17, wherein the network provider region A uses frequency groups Fa that do not overlap frequency groups Fb used by the network provider region B.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.