Control node handover in radio access network
First Claim
1. A telecommunications system having a radio access network comprising:
- plural control nodes;
inter-control node links for connecting the plural control nodes;
a handover selection unit which makes a selection regarding which of plural connections handled by the radio access network should have control thereof moved from a first control node to another of the plural control nodes to alleviate congestion on an overloaded one of the inter-control node links, the selection including a determination of a cost for each of the connections carried by the overloaded link;
wherein the cost for each of the connections carried by the overloaded link depends on (1) a number of inter-control links involved in the connection, and (2) an inter-control link bandwidth required by the connection.
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Accused Products
Abstract
A telecommunications system (10) has a radio access network comprising plural control nodes (26) and inter-control node links (Iur) for connecting the plural control nodes. A handover selection function (200) makes a selection regarding which of plural connections handled by the radio access network should have control thereof moved from a first control node (e.g., current SRNC) to another of the plural control nodes (e.g., target SRNC) to alleviate congestion on an overloaded one of the inter-control node links. The selection includes a determination of a cost for each of the connections carried by the overloaded link. The cost of each of the connections carried by the overloaded link is a product of a number of inter-control links involved in the connection and an inter-control link bandwidth required by the connection. The handover selection function particularly determines a most costly one of the connections carried by the overloaded link, and further determines a target one of the plural control nodes to which the control of the most costly connection can be handed over. In accordance with one aspect of the invention, the target control node is a control node involved in the candidate connection which is farthest from the first control node (e.g., current SRNC node).
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Citations
19 Claims
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1. A telecommunications system having a radio access network comprising:
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plural control nodes;
inter-control node links for connecting the plural control nodes;
a handover selection unit which makes a selection regarding which of plural connections handled by the radio access network should have control thereof moved from a first control node to another of the plural control nodes to alleviate congestion on an overloaded one of the inter-control node links, the selection including a determination of a cost for each of the connections carried by the overloaded link;
wherein the cost for each of the connections carried by the overloaded link depends on (1) a number of inter-control links involved in the connection, and (2) an inter-control link bandwidth required by the connection. - View Dependent Claims (2, 3, 4, 5)
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6. A telecommunications system having a radio access network comprising:
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plural control nodes;
inter-control node links for connecting the plural control nodes;
a handover selection unit which makes a selection regarding which of plural connections handled by the radio access network should have control thereof moved from a first control node to another of the plural control nodes to alleviate congestion on an overloaded one the inter-control node links, the selection including a determination of a cost for each of the connections carried by the overloaded link;
wherein the selection includes a determination of a most costly one of the connections carried by the overloaded link, and wherein the most costly one of the connections carried by the overloaded link becomes a candidate connection for handover. - View Dependent Claims (7)
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8. A method of operating telecommunications system having a radio access network, the radio access network having plural control nodes and inter-control node links for connecting the plural control nodes, wherein the method comprises:
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selecting which of plural connections handled by the radio access network should have control thereof moved from a first control node to another of the plural control nodes to alleviate congestion on an overloaded one of the inter-control node links, the selecting including a determining a cost for each of the connections carried by the overloaded link;
determining the cost for each of the connections carried by the overloaded link as a function of (1) a number of inter-control links involved in the connection, and (2) an inter-control link bandwidth required by the connection. - View Dependent Claims (9, 10)
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11. A method of operating telecommunications system having a radio access network, the radio access network having plural control nodes and inter-control node links for connecting the plural control nodes, wherein the method comprises:
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selecting which of plural connections handled by the radio access network should have control thereof moved from a first control node to another of the plural control nodes to alleviate congestion on an overloaded one of the inter-control node links, the selecting including a determining a cost for each of the connections carried by the overloaded link;
wherein the selecting includes determining a most costly one of the connections carried by the overloaded link, and wherein the most costly one of the connections carried by the overloaded link becomes a candidate connection for handover. - View Dependent Claims (12)
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13. A handover selection function which makes a selection regarding which of plural connections handled by the radio access network should have control thereof moved from a first control node to another of plural control nodes of a radio access network to alleviate congestion on an overloaded one of inter-control node links connecting the plural control nodes, the selection including making a determination of a cost for each of the connections carried by the overloaded link;
- wherein the cost for each of the connections carried by the overloaded link depends on (1) a number of inter-control links involved in the connection, and (2) an inter-control link bandwidth required by the connection.
- View Dependent Claims (14, 15, 16, 17)
- 18. A handover selection function which makes a selection regarding which of plural connections handled by the radio access network should have control thereof moved from a first control node to another of plural control nodes of a radio access network to alleviate congestion on an overloaded one of inter-control node links connecting the plural control nodes, the selection including making a determination of a cost for each of the connections carried by the overloaded link, wherein the selection includes a determination of a most costly one of the connections carried by the overloaded link, and wherein the most costly one of the connections carried by the overloaded link becomes a candidate connection for handover.
Specification