Network node control for facilitating relocation
A method of controlling network nodes of a wireless communications network, a network node and a computer program product are disclosed. The method of controlling networks nodes of a wireless communications network to facilitate relocation of at least a first network node from connection with a second network node to connection with one of a plurality of neighboring network nodes, at least one of said network nodes being operable to switch, in accordance with an associated predetermined switching pattern, between an active mode of connection in which wireless communication is supported and a dormant mode of connection in which wireless communication is not supported, comprises the steps of: determining when said first network node is configured to support wireless communication with said second network node; and providing information to adjust said associated predetermined switching pattern to improve a likelihood of supporting wireless communication between said first network node and said one of a plurality of network nodes to thereby facilitate said relocation. By adjusting the switching patterns, it is more likely that the first network node will be able to detect the presences of one of the plurality of network nodes. Improving the likelihood of detecting the presence of these network nodes may in turn improve the probability of a successful relocation being facilitated.
1. A method of controlling network nodes of a wireless communications network to facilitate relocation of at least a first network node, from connection with a second network node to connection with one of a plurality of neighbouring network nodes, said method comprising:
determining when said first network node is configured to support wireless communication with said second network node; and
wherein at least one of said network nodes is operable to switch, in accordance with an associated predetermined switching pattern, between an active mode of connection in which wireless communication is supported and a dormant mode of connection in which wireless communication is not supported;
providing information to adjust said associated predetermined switching pattern to improve a likelihood of supporting wireless communication between said first network node and said one of a plurality of neighbouring network nodes to thereby facilitate said relocation.
2. The method of claim 1 , wherein providing information causes any switching patterns of at least one of said plurality of neighbouring network nodes to be adjusted to cause those neighbouring network nodes to remain in said active mode.
3. The method of claim 1 , comprising:
establishing, from measurement reports received from said first network node, whether a strength of a wireless signal from said second network node has failed to achieve a predetermined threshold level; and
performing said steps of determining and providing information when said measurement reports indicate that a strength of wireless signals from none of said plurality of neighbouring network nodes exceeds said predetermined threshold level.
4. The method of claim 3 , comprising:
factoring said strength of wireless signals from at least one of said neighbouring plurality of network nodes based on any switching pattern for that network node to determine whether a factored signal strength based on continued transmission in said active mode for that network node would exceed said predetermined threshold level and, if so, said step of providing information comprises providing information to adjust said associated predetermined switching pattern of that neighbouring network node.
5. The method of claim 1 , comprising:
estimating, based on at least one of position information and a strength of wireless signals from said plurality of neighbouring network nodes, a set of said plurality of neighbouring network nodes located nearest to said first network node and said step of providing information comprises providing information to adjust said associated predetermined switching pattern of said set of said plurality of neighbouring network nodes.
6. The method of claim 1 , comprising:
sending information to revert said associated switching pattern to their previous configuration of any of said plurality of neighbouring network nodes which were changed by said step of providing information and to which said first network node failed to relocate.
7. The method of claim 1 , comprising:
transmitting information to cause said first network node and said one of said plurality of neighbouring network nodes to which said first network node relocated to adjust their switching patterns to align with the previous configuration of said associated switching pattern of said one of said plurality of neighbouring network nodes.
8. The method of claim 1 , comprising:
establishing a common pattern of periods when at least one of said plurality of neighbouring network nodes is to be in said active mode and said step of providing information comprises providing information to adjust at least one associated predetermined switching pattern to include said common pattern of periods when said at least one of said plurality of neighbouring network nodes is to be in said active mode.
9. The method of claim 8 , wherein providing information comprises providing information to adjust a switching pattern of said first network node to cause said first network node to be in said active mode during said common pattern of periods.
10. The method of claim 8 , wherein providing information comprises providing information to manipulate an identifier of said first network node to cause Measurement Occasions to occur during said common pattern of periods.
11. The method of claim 8 , comprising:
transmitting, in an Inter-frequency Cell Information List, details of those of said plurality of neighbouring network nodes sharing a frequency band currently being utilised by said first network node for wireless communication with said second network node.
12. The method of claim 1 , comprising:
establishing paging occasions of said first network node and said step of providing information comprises providing information to adjust said associated predetermined switching pattern to include said paging occasions as periods when at least one of said plurality of neighbouring network nodes is to be in said active mode.
13. The method of claim 1 , comprising:
establishing a predetermined switching pattern for at least one of said plurality of neighbouring network nodes and said step of providing information comprises transmitting an indicator indicative of said predetermined switching patterns to said first network node.
14. A non-transitory computer program product operable, when executed on a computer, to perform the method of claim 1 .
15. A network node operable to control network nodes of a wireless communications network to facilitate relocation of at least a first network node from connection with a second network node to connection with one of a plurality of neighbouring network nodes, said network node comprising:
determining logic operable to determine when said first network node is configured to support wireless communication with said second network node, wherein at least one of said network nodes being operable to switch, in accordance with an associated predetermined switching pattern, between an active mode of connection in which wireless communication is supported and a dormant mode of connection in which wireless communication is not supported; and
provision logic operable to provide information to adjust an associated predetermined switching pattern to improve a likelihood of supporting wireless communication between said first network node and said one of a plurality of network nodes to thereby facilitate said relocation.