Traitement en cours

Veuillez attendre...

Paramétrages

Paramétrages

Aller à Demande

1. WO2019058092 - PROCÉDÉ DE RÉCEPTION DE COMMUNICATIONS

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

CLAIMS

1. A method in a terminal configured to receive transmissions from a telecommunications network, the method comprising:

receiving a transmission on an anchor carrier, the transmission including control information;

receiving, on the anchor carrier, an allocation of a non-anchor carrier for receiving data, wherein the non-anchor carrier has a frequency; and

performing a cell search operation, comprising:

scanning a plurality of frequencies for a cell of the telecommunications network; and

inhibiting the frequency of the non-anchor carrier in the scanning.

2. A method according to claim 1, wherein:

the method comprises adding the frequency of the non-anchor carrier to a non-anchor carrier set; and

frequencies of the non-anchor carrier set are inhibited in the scanning.

3. A method according to claim 2, comprising dynamically altering the non-anchor carrier set, wherein the dynamic altering comprises:

determining that a removal condition has been met; and

responsive to determining that the removal condition has been met, removing the frequency of the non-anchor carrier from the non-anchor carrier set.

4. A method according to claim 3, wherein the removal condition is that a time elapsed since adding the frequency of the non-anchor carrier to the non-anchor carrier set exceeds a threshold.

5. A method according to claim 3, wherein the removal condition is that a distance travelled by the terminal since adding the frequency of the non-anchor carrier to the non-anchor carrier set exceeds a threshold.

6. A method according to any of claims 2 to 5, comprising:

receiving an indication of a frequency of a further non-anchor carrier; and adding the frequency of the further non-anchor carrier to the non-anchor carrier set.

7. A method according to any preceding claim, wherein the plurality of frequencies comprises the frequency of the non-anchor carrier and wherein inhibiting the frequency of the non-anchor carrier comprises:

assigning a first priority to the frequency of the non-anchor carrier;

assigning at least one second priority to at least one respective frequency of the plurality of frequencies, other than the frequency of the non-anchor carrier, wherein the at least one second priority is higher than the first priority; and

scanning the plurality of frequencies in an order based on the assigned first and second priorities.

8. A method according to any of claims 1 to 6, wherein inhibiting the frequency of the non-anchor carrier comprises excluding the non-anchor carrier from the scanning.

9. A method according to any preceding claim, wherein performing the cell search operation comprises:

determining, for at least one frequency of the plurality of frequencies, whether a transmission has been received on an anchor carrier with that frequency within a time window prior to the performing the cell search;

assigning a priority to the at least one frequency of the plurality based on said determining; and

scanning the plurality of frequencies in an order based on the assigned priorities of the plurality of frequencies.

10. A method according to any preceding claim, comprising:

determining at least one transmission frequency associated with a non-preferred public land mobile network; wherein

the cell search operation comprises inhibiting the at least one transmission frequency associated with the non-preferred public land mobile network in the scanning.

11. A method according to any preceding claim comprising, responsive to a failure of the cell search operation to establish communication with a cell of the telecommunications network, performing a further cell search operation, wherein: the further cell search operation comprises scanning the frequency of the non-anchor carrier for a cell of the telecommunications network.

A terminal for use in a telecommunications system, the terminal comprising: a receiver configured to:

receive a transmission on an anchor carrier, the transmission including control information;

receive, on the anchor carrier, an allocation of a non-anchor carrier for receiving data, wherein the non-anchor carrier has a frequency;

a memory configured to store the frequency of the non-anchor carrier; and a cell search module configured to perform a cell search comprising:

scanning a plurality of frequencies for a cell of the telecommunications network; and

inhibiting the frequency of the non-anchor carrier in the scanning.

13. A terminal according to claim 12, wherein the memory is a non- volatile memory.

14. A terminal according to claim 12 or claim 13, wherein the terminal is a Narrowband Internet of Things terminal.

15. A non-transitory computer-readable storage medium comprising a set of computer-readable instructions stored thereon which, when executed by at least one processor of a terminal of a telecommunications network, cause the at least one processor to:

receive a transmission on an anchor carrier, the transmission including control information;

receive, on the anchor carrier, an allocation of a non-anchor carrier for receiving data, wherein the non-anchor carrier has a frequency; and

perform a cell search operation, comprising:

scanning a plurality of frequencies for a cell of the telecommunications network; and

inhibiting the frequency of the non-anchor carrier in the scanning.