Method and apparatus for generating coverage in a cellular network

• US 8,385,926 B2
• Filed: 12/11/2006
• Issued: 02/26/2013
• Est. Priority Date: 12/11/2006
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Johansson, Martin, Andersson, Mats H, Karlsson, Ingemar Folke
• Primary Examiner(s): MITCHELL, NATHAN A
• Application Number:
  US12/517,323
• Publication Number:
  US 20100075683A1
• Time in Patent Office: 2,269 Days
• Field of Search: 455/446, 370/315
• US Class Current: 455/446
• CPC Class Codes: H04B 7/15507 Relay station based processing for cell extension or control of coverage area, network planning with network coordinated processing with regard to cell extension H04W16/26; network topologies using dedicated repeater stations H04W84/047; terminal devices adapted for relaying to or from an other terminal H04W88/04
• CPC Class Codes: H04B 7/2606 Arrangements for base station coverage control, e.g. by using relays in tunnels
• CPC Class Codes: H04W 16/26 Cell enhancers or enhancement, e.g. for tunnels, building shadow
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition

Abstract

A sub-node, such as a repeater station or relay station, equipped with a multi-beam sub-node link antenna. The beams of the sub-node link antenna allow communication between the sub-node and at least two nodes (access points/base stations) 11_A-B; 11_A-E. The sub-node is further provided with at least one transmitting and receiving coverage antenna to generate coverage in at least one geographical secondary coverage area a; a-c, and a control mechanism that selects one of the nodes to extend the geographical primary coverage area A-B; A-E of the node 11_A-B; 11_A-E to include the geographical secondary coverage area a; a-c of the sub-node. The invention is also related to a cellular communication network, and a method for generating coverage in a cellular communication network.

Claims

1. A sub-node configured to be used in a cellular communication network, said sub-node comprising:

at least one transmitting and receiving coverage antenna to generate coverage in at least one geographical secondary coverage area, said sub-node configured to be in communication with a node, generating coverage in a geographical primary coverage area, to extend the coverage of said node to include said at least one geographical secondary coverage area;

at least one link antenna configured to provide communication with a plurality of nodes;

means to divide the at least one geographical secondary coverage area of said at least one sub-node into at least two parts dependent on measured parameters, wherein said parameters include at least the traffic load in the cellular communication network; and

,

a control mechanism, responsive to said measured parameters, configured to select a first node and a second node from said plurality of nodes to extend coverage of each of said selected first node and second node to include at least one part of said divided geographical secondary coverage area.

2. The sub-node according to claim 1, wherein said means to divide the at least one geographical secondary coverage area comprises means to shape the beams generating the divided secondary coverage areas.

3. The sub-node according to claim 1, wherein said sub-node is a relay station or repeater station.

4. The sub-node according to claim 1, wherein said control mechanism is manually controlled by an operator managing the cellular communication network.

5. A cellular communication network comprising a plurality of nodes each having transmitting and receiving antennas to generate coverage in a geographical primary coverage area, said network comprising:

at least one sub-node having transmitting and receiving coverage antennas to generate coverage in at least one geographical secondary coverage area, said sub-node in communication with a node to extend the coverage of said node to include said at least one geographical secondary coverage area; and

,

at least one link antenna providing communication with a plurality of nodes;

wherein said at least one sub-node further comprises;

means to divide the at least one geographical secondary coverage area of said at least one sub-node into at least two parts dependent on measured parameters, wherein said parameters include at least the traffic load in the cellular communication network; and

,

a control mechanism, responsive to said measured parameters, configured to select a first node and a second node from said plurality of nodes to extend each coverage of said selected first node and second node to include at least one part of said divided geographical secondary coverage area.

6. The cellular communication network according to claim 5, wherein said means to divide the at least one geographical secondary coverage area comprises means to shape the beams generating the divided secondary coverage areas.

7. The cellular communication network according to claim 5, wherein at least one of said at least one sub-node is a relay station or a repeater station.

8. The cellular communication network according to claim 5, wherein said control mechanism is manually controlled by an operator managing the cellular communication network.

9. The cellular communication network according to claim 5, wherein said node is a base station.

10. A method for generating coverage in a cellular communication network comprising a plurality of nodes each having transmitting and receiving antennas to generate coverage in a geographical primary coverage area, said method comprising the steps of:

providing at least one sub-node having transmitting and receiving coverage antennas generating coverage in at least one geographical secondary coverage area, said sub-node communicating with a node to extend the coverage of said node to include said at least one geographical secondary coverage area;

providing communication between said at least one sub-node and a plurality of nodes;

dividing the at least one geographical secondary coverage area of said at least one sub-node into at least two parts dependent on measured parameters, wherein said parameters include at least the traffic load in the cellular communication network; and

,

configuring a control mechanism, responsive to said measured parameters, to select a first node and a second node from said plurality of nodes to extend each coverage of said selected first node and a second node to include at least one part of said divided geographical secondary coverage area.

11. The method according to claim 10, further comprising the step of dividing said at least one geographical secondary coverage area by shaping the beams generating the divided secondary coverage area.

12. The method according to claim 10, further comprising the step of selecting at least one of said at least one sub-node to be a relay or repeater station.

13. The method according to claim 10, wherein said control mechanism is manually controlled by an operator managing the cellular communication network.

14. The method according to claim 10, wherein said node is a base station.