Granted Patent B2

US 9,642,106 · App. 13/848,564 · Granted May 2, 2017

Abstract

Claims (40)

1. A method comprising:

instructing user equipment (UE) to conduct radio frequency (RF) measurements of certain radio nodes in a network based on a received primary scrambling code (PSC);

instructing the UE to send the RF measurements to the network only if the RF measurements meet a predetermined condition:

receiving, at the network, a measurement report from the UE including a PCS indicative of a target cell;

creating a radio link between the UE and a radio node on each of a plurality of cells, including the target cell, that are associated with the PSC;

performing a synchronization procedure to add the created radio links to the UE's active set; and

receiving a radio link restore indication for one of the created radio links associated with a radio node on the target cell; and

creating the radio link between the UE and a radio node on each of the plurality of cells with the same orthogonal variable spreading factor (OVSF) code and the same timing offset information.

2. The method of claim 1 further comprising, deleting the remainder of the created radio links.

3. The method of claim 1 , wherein the plurality of cells comprises at least a subset of internal cells.

4. The method of claim 3 further comprising, determining whether a cell belongs in the subset of internal cells by performing at least one of the following:

ignoring a cell if the cell has previously been included in the subset;

selecting the cell if the cell was detected by a serving cell of the UE;

selecting the cell by a second cell within the active set of the UE; and

selecting the cell if the cell is a strongest detected first tier neighbor cell.

5. The method of claim 1 further comprising, repeating the synchronization procedure to add the created radio links for a predetermined number of iterations.

6. The method of claim 5 further comprising, pegging the PSC with the target cell as a neighbor of the active set of the UE, and assigning a resolved status to a combination of the PSC and the active set.

7. The method of claim 6 further comprising, maintaining the combination of the PSC and the active set as an entry in a dynamically populated hash table.

8. The method of claim 5 further comprising, pegging the PSC with the target cell as a neighbor of the active set of the UE, and assigning an unresolved status to a combination of the PSC and the active set if the repeating of the synchronization procedure results in a predetermined number of failures to receive the radio link restore indication.

9. An apparatus comprising: a processor; and

a memory including computer program code, the memory and the computer program code configured to, with the at least one processor, cause the apparatus to perform at least the following:

instructing user equipment (UE) to conduct radio frequency (RF) measurements of certain radio nodes in a network based on a received primary scrambling code (PSC);

instructing the UE to send the RF measurements to the network only if the RF measurements meet a predetermined condition;

receive, at the network, a measurement report the UE including a PSC indicative of a target cell;

create a radio link between the UE and a radio node on each of a plurality of cells, including the target cell, that are associated with the PSC;

perform a synchronization procedure to add the created radio links to the UE's active set; and

receive a radio link restore indication for one of the created radio links associated with a radio node on the target cell; and

create the radio link between the UE and a radio node on each of the plurality of cells with the same orthogonal variable spreading factor (OVSF) code and the same timing offset information.

10. The apparatus of claim 9 , wherein the memory and the computer program code configured to, with the at least one processor, further cause the apparatus to delete the remainder of the created radio links.

11. The apparatus of claim 9 , wherein the plurality of cells comprises at least a subset of internal cells.

12. The apparatus of claim 9 , wherein the memory and the computer program code configured to, with the at least one processor, further cause the apparatus to repeat the synchronization procedure to add the created radio links for a predetermined number of iterations.

13. The apparatus of claim 12 , wherein the memory and the computer program code configured to, with the at least one processor, further cause the apparatus to peg the PSC with the target cell as a neighbor of the active set of the UE, and assign a resolved status to a combination of the PSC and the active set.

14. A computer program product embodied on a computer-readable non-transitory medium comprising:

computer code for instructing user equipment (UE) to conduct radio frequency (RF) measurements of certain radio nodes in a network based on a received primary scrambling code (PSC);

computer code for instructing the UE to send the RF measurements to the network only if the RF measurements meet a predetermined condition:

computer code for receiving a measurement report from the UE including a PSC indicative of a target cell;

computer code for creating a radio link between the UE and a radio node on each of a plurality of cells, including the target cell, that are associated with the PSC;

computer code for performing a synchronization procedure to add the created radio links to the UE's active set; and

computer code for receiving a radio link restore indication for one of the created radio links associated with a radio node on the target cell; and

computer code for creating the radio link between the UE and a radio node on each of the plurality of cells with the same orthogonal variable spreading factor (OVSF) code and the same timing offset information.

Assignments (8)