Abstract
The invention relates to a technique for performing a random access procedure over a radio interface, for example between a mobile terminal and a radio base station of a mobile network. A method aspect of the invention comprises the steps of transmitting a synchronization request for synchronization information; receiving synchronization information in response to the synchronization request; and transmitting, based on at least one transmission parameter adjusted in accordance with the synchronization information, a resource request for data transmission resources.
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Claim
1. A method in a mobile terminal, comprising:
transmitting a synchronization request for synchronization information;
receiving synchronization information in response to the synchronization request;
transmitting, by the mobile terminal based on at least one transmission parameter adjusted in accordance with the received synchronization information, a resource request for data transmission resources, the resource request for data transmission resources comprising a request for time or frequency resources for transmitting a data transmission to a network node;
in response to receiving the synchronization information, starting a synchronization timer; and
wherein on or after an expiry of the synchronization timer, the at least one transmission parameter is considered outdated and a further synchronization request is transmitted prior to any data transmission.
2. The method of claim 1, wherein upon the expiry of the synchronization timer the at least one uplink transmission parameter is considered to be outdated.
3. The method of claim 1, wherein the synchronization request is a first synchronization request, and the method further comprises transmitting a second synchronization request either upon the expiry of the synchronization timer or after the expiry of the synchronization timer.
4. The method of claim 1, further comprising:
receiving resource information in response to the resource request; and
transmitting data using one or more resources in accordance with the resource information.
5. The method of claim 4, wherein the resource information comprises at least one scheduled resource, and wherein the data is transmitted using the at least one scheduled resource.
6. The method of claim 1, further comprising transmitting, in case further data is to be transmitted, at least one further resource request.
7. The method of claim 1, wherein the synchronization timer is set according to a predicted validity of the synchronization information.
8. The method of claim 1, wherein the synchronization timer is set according to a measured velocity of the mobile terminal.
9. The method of claim 1, further comprising transmitting at least one ping signal for maintaining synchronization.
10. The method of claim 9, wherein the ping signal comprises signalling data.
11. A method in a radio base station, comprising:
receiving a first synchronization request for synchronization information from a mobile terminal;
transmitting the synchronization information to the mobile terminal in response to the synchronization request;
receiving, at the radio base station, a resource request for data transmission resources, the resource request for data transmission resources based on at least one transmission parameter adjusted according to the synchronization information, the resource request for data transmission resources comprising a request for time or frequency resources for transmitting a data transmission to a network node; and
receiving a second synchronization request for synchronization information from the mobile terminal, wherein the second synchronization request is receivable from the mobile terminal prior to receiving any data from the mobile terminal and on or after an expiry of a synchronization timer in the mobile terminal, wherein the synchronization timer is started in response to reception of the synchronization information and wherein the at least one transmission parameter is considered outdated on or after expiry of the synchronization timer.
12. The method of claim 11, further comprising starting a synchronization timer in the radio base station upon one of receiving a synchronization request, receiving a resource request, and receiving data.
13. The method of claim 11, further comprising:
transmitting resource information in response to the resource request; and
scheduling resources based at least in part on the received resource request.
14. The method of claim 11, wherein upon the expiry of the synchronization timer the at least one uplink transmission parameter is considered to be outdated.
15. The method of claim 11, further comprising receiving at least one further resource request.
16. The method of claim 11, further comprising transmitting, upon the expiry of the synchronization timer, a request for a ping signal.
17. A mobile terminal, comprising:
one or more processors coupled to a memory, the one or more processors configured to:
transmit a synchronization request for synchronization information;
receive synchronization information in response to the synchronization request;
transmit, based on at least one transmission parameter adjusted in accordance with the received synchronization information, a resource request for data transmission resources, the resource request for data transmission resources comprising a request for time or frequency resources for transmitting a data transmission to a network node;
in response to receiving the synchronization information, start a synchronization timer; and
wherein on or after an expiry of the synchronization timer, the at least one transmission parameter is considered outdated and a further synchronization request is transmitted prior to any data transmission.
18. The mobile terminal of claim 17, wherein upon the expiry of the synchronization timer the at least one uplink transmission parameter is considered to be outdated.
19. The mobile terminal of claim 17, wherein the synchronization request is a first synchronization request, and the one or more processors are further configured to transmit a second synchronization request either upon the expiry of the synchronization timer or after the expiry of the synchronization timer.
20. The mobile terminal of claim 17, wherein the one or more processors are further configured to:
receive resource information in response to the resource request; and
transmit data using one or more resources in accordance with the resource information.
21. The mobile terminal of claim 20, wherein the resource information comprises at least one scheduled resource, and wherein the data is transmitted using the at least one scheduled resource.
22. The mobile terminal of claim 17, wherein the one or more processors are further configured to transmit, in case further data is to be transmitted, at least one further resource request.
23. The mobile terminal of claim 17, wherein the synchronization timer is set according to a predicted validity of the synchronization information.
24. The mobile terminal of claim 17, wherein the synchronization timer is set according to a measured velocity of the mobile terminal.
25. The mobile terminal of claim 17, wherein the one or more processors are further configured to transmit at least one ping signal for maintaining synchronization.
26. The mobile terminal of claim 25, wherein the ping signal comprises signalling data.
27. A radio base station, comprising:
one or more processors coupled to a memory, the one or more processors configured to:
receive a first synchronization request for synchronization information from a mobile terminal;
transmit synchronization information to the mobile terminal in response to the synchronization request;
receive a resource request for data transmission resources, the resource request for data transmission resources based on at least one transmission parameter adjusted according to the synchronization information, the resource request for data transmission resources comprising a request for time or frequency resources for transmitting a data transmission to a network node; and
receive a second synchronization request for synchronization information from the mobile terminal, wherein the second synchronization request being receivable on or after an expiry of a synchronization timer in the mobile terminal, wherein the synchronization timer is started in response to reception of the synchronization information and wherein the at least one transmission parameter is considered outdated on or after expiry of the synchronization timer.
28. The radio base station of claim 27, wherein the one or more processors are further configured to start a synchronization timer in the radio base station upon one of receiving the synchronization request, receiving the resource request, and receiving data.
29. The radio base station of claim 28, wherein the one or more processors are further configured to transmit, upon the expiry of the synchronization timer, a request for a ping signal.
30. The radio base station of claim 27, wherein the one or more processors are further configured to:
transmit resource information in response to the resource request; and
schedule resources based at least in part on the received resource request.
31. The radio base station of claim 27, wherein upon the expiry of the synchronization timer the at least one uplink transmission parameter is considered to be outdated.
32. The radio base station of claim 27, wherein the one or more processors are further configured to receive at least one further resource request.
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The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)
The information in grey was provided by the patent holder
The information in purple was extracted from the FrandAvenue
Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
Family member:related patents or applications that share a common priority or original filing.