IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0739204
(2000-12-19)
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우선권정보 |
JP-0113757 (1999-12-28) |
발명자
/ 주소 |
- Shinozaki, Takuya
- Umeda, Narumi
- Yamao, Yasushi
|
출원인 / 주소 |
|
대리인 / 주소 |
Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
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인용정보 |
피인용 횟수 :
9 인용 특허 :
5 |
초록
▼
A location managing method for managing a location of a mobile station in a mobile wireless packet communication system in which each of communication nodes down to a base station have a hierarchical structure, wherein a route from a communication node positioned at a highest layer of the hierarchic
A location managing method for managing a location of a mobile station in a mobile wireless packet communication system in which each of communication nodes down to a base station have a hierarchical structure, wherein a route from a communication node positioned at a highest layer of the hierarchical structure to a base station of a cell in which a mobile station is located, is managed as location information of the mobile station, by being distributed to the communication node located at the highest layer of the hierarchical structure and to each of communication nodes in the route to the base station.
대표청구항
▼
1. A method for managing a location of a mobile station in a mobile wireless packet communication system in which a plurality of communication nodes form a hierarchical structure, comprising:distributedly managing a first route from a communication node positioned at a highest layer of the hierarchi
1. A method for managing a location of a mobile station in a mobile wireless packet communication system in which a plurality of communication nodes form a hierarchical structure, comprising:distributedly managing a first route from a communication node positioned at a highest layer of the hierarchical structure to a first base station of a cell in which a mobile station is located, said distributedly managing performed by each communication node in the first route in accordance with mobile station location information; andwhen said mobile station communicating moves to a cell of a second base station, returning a packet addressed to said mobile station from each communication node positioned in the first route to a communication node which is positioned in both the first route and in a second route, said second route from the communication node positioned at the highest layer of the hierarchical structure to the second base station, said communication nodes returning the packet positioned lower in the first route than the communication node in the first and second routes,wherein said cell of said second base station is different from said cell of said first base station. 2. A mobile wireless packet communication system comprising:a plurality of communication nodes formed in a hierarchical structure; anda first route from a communication node positioned at a highest layer of the hierarchical structure to a first base station of a first cell in which a mobile station is located, said first route distributedly managed in accordance with mobile station location information by each communication node in the first route, whereina packet addressed to said mobile station is successively transferred from the communication node positioned at the highest layer of the hierarchical structure to the first base station,each of the communication nodes in the first route includes a routing table configured to manage a portion of the first route,when said mobile station moves to a second cell of a second base station, a communication node which is positioned at a layer higher than the second base station receives a location registration updated request signal from the mobile station via the second base station and updates a local routing table, andsaid second base station is different from said first base station, and said second cell is different from said first cell,each communication node in a route from a communication node which is common to the first route an the second route deletes from a routing table thereof management information corresponding to the first route,each communication node positioned in layers lower than the common communication node and in the first route returns the packet addressed to the mobile station to the common communication node. 3. The mobile wireless packet communication system of claim 2, wherein:each communication node returning the packet is configured to receive a packet transfer request signal from the common communication node. 4. A mobile wireless packet communication system, comprising:a plurality of communication nodes and base stations in communicable relation according to a hierarchical structure; anda route from a communication node positioned at a highest layer of the hierarchical structure to a base station of a cell in which a mobile station is located, said route managed in accordance with mobile station location information by each communication node in the route;means for paging the mobile station from a plurality of base stations under control of a predetermined communication node;means for receiving a location registration update request signal from the mobile station;means for determining when the mobile terminal moves from a base station in a first cell to an other base station, said other base station located in a second cell; andmeans for updating one or more routing tables of communication nodes in a second route from the communication node positioned at the highest layer of the hie rarchical structure to the other base station and which are not part of the first route, when(i) the mobile station moves from the base station to the other base station; and(ii) the means for receiving receives the location registration update request signal,such that when the mobile station moves to the second cell in a reception waiting state and does not transmit the location registration update request signal, the updating means is not activated, whereina packet addressed to the mobile station is successively transferred from the communication node in the highest layer to one of the base station and the other base station along the respective first and second routes, andeach communication node comprises a routing table configured to manage a portion of an assigned route from the communication node positioned at the highest layer of the hierarchical structure to a current base station of a current cell in which the mobile station is located. 5. The mobile wireless packet communication system of claim 4, further comprising:means for determining whether or not to transmit a location registration update request signal from the mobile station in accordance with a paging area in which the mobile station is located. 6. The mobile wireless packet communication system of claim 5, further comprising:means for setting the paging area from the mobile station in accordance with a node number. 7. The mobile wireless packet communication system of claim 6, further comprising:means for deleting management information of a portion of the first route from a routing table of a communication node located below a communication node located in both the first and second routes when the mobile station assumes a communication state with the other base station. 8. The mobile wireless packet communication system of claim 7, further comprising:means for transmitting a packet transfer request signal to the base station of the first route before the mobile station moves from the first route to the second route. 9. The mobile wireless packet communication system of claim 8, further comprising:means for returning a packet to one of the communication nodes in the first route, said means for returning a packet responsive to the packet transfer request signal. 10. The mobile wireless packet communication system of claim 8, further comprising:means for returning the packet addressed to the mobile station to the common communication node from each communication node in the first route in a layer lower than the common communication node. 11. A communication node for a mobile wireless packet communication system including a plurality of communication nodes and base stations in communicable relation according to a hierarchical structure, wherein a route from a communication node positioned at a highest layer of the hierarchical structure to a base station of a cell in which a mobile station is located is managed in accordance with mobile station location information distributed to each communication node in the route, and a packet addressed to the mobile station is successively transferred from the communication node in the highest layer to the base station in accordance with the route which is distributedly managed so as to transfer the packet from the base station to the mobile station by a wireless communication, each communication node comprising:a routing table configured to manage a portion of the route, whereinsaid mobile wireless packet communication system includesmeans for paging the mobile station from a plurality of base stations under control of a predetermined communication node,means for receiving a location registration update request signal from the mobile station,means for determining when the mobile terminal moves from a base station in a first cell to an other base station in a second cell, andmeans for updating one or more routing tables of communication nodes in a route to the other base station in the second cell and which did not manage a portion of the route to the base station of the first cell, when:(i) the mobile station moves from the base station of the first cell to the base station of the second cell, and(ii) the means for receiving receives the location registration update request signal,such that when the mobile station moves to the second cell in a reception waiting state and does not transmit the location registration update request signal, the updating means is not activated.
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