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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Technologies
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Use Cases
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Claim
1. A method of performing a random access procedure over a radio interface, the method in a mobile terminal comprising:
transmitting, by the mobile terminal, a synchronization request for synchronization information;
receiving, at the mobile terminal, 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 synchronization information, a resource request for data transmission resources; and
using a timer mechanism providing an indication related to the validity of the at least one transmission parameter utilized by the mobile terminal to keep the mobile terminal in synchronization.
2. The method according to claim 1,
further comprising:
receiving resource information in response to the resource request; and
transmitting data using resources in accordance with the resource information.
3. The method according to claim 2,
further comprising transmitting, in case further data is to be transmitted, at least the further resource request.
4. The method according to claim 1,
further comprising starting a synchronization timer in response to at least one of the reception of synchronization information and the transmission of data.
5. The method according to claim 4,
wherein the synchronization timer is set according to a predicted validity of the synchronization information.
6. The method according to claim 4,
wherein the synchronization timer is set according to a measured velocity of the mobile terminal.
7. The method according to claim 4,
wherein a further synchronization request is transmitted on expiry of the synchronization timer.
8. The method according to claim 1,
further comprising transmitting at least one ping signal for maintaining synchronization.
9. The method according to claim 8,
wherein the ping signal comprises signalling data.
10. The method according to claim 8,
wherein the ping signal is transmitted on expiry of the synchronization timer.
11. The method according to claim 8,
wherein the ping signal is transmitted in response to a polling request received over the radio interface.
12. A method of performing a random access procedure over a radio interface, the method in a radio base station comprising:
receiving, at the radio base station, a synchronization request for synchronization information;
transmitting, by the radio base station based on the synchronization request, the synchronization information;
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; and
using a timer mechanism providing an indication related to the validity of the at least one transmission parameter utilized by a mobile terminal to keep the mobile terminal in synchronization.
13. The method according to claim 12,
further comprising:
transmitting resource information in response to the resource request; and
scheduling resources according to the resource information.
14. The method according to claim 12,
further comprising receiving at least one further resource request.
15. The method according to claim 12,
further comprising starting a synchronization timer in response to at least one of the reception of the synchronization request, the reception of the resource request and the reception of data.
16. The method according to claim 15,
further comprising transmitting, on expiry of the synchronization timer, a request for a ping signal.
17. A computer program product comprising program code portions for performing the method according to claim 1 when the computer program product is executed on one or more computing devices.
18. The computer program product of claim 17, stored on a computer readable recording medium.
19. A mobile terminal adapted for performing a random access procedure over a radio interface, the mobile terminal comprising one or more processors, the one or more processors configured to:
transmit, from the mobile terminal, a synchronization request for synchronization information;
receive, at the mobile terminal, synchronization information in response to the synchronization request;
transmit, from the mobile terminal based on at least one transmission parameter adjusted according to the synchronization information, a resource request for data transmission resources; and
provide an indication related to the validity of the at least one transmission parameter used by the mobile terminal to keep the mobile terminal in synchronization.
20. A radio base station adapted for performing a random access procedure over a radio interface, the radio base station comprising one or more processors, the one or more processors configured to:
receive, at the radio base station, a synchronization request for synchronization information;
transmit, from the radio base station based on the synchronization request, the synchronization information;
receive, 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; and
provide an indication related to the validity of the at least one transmission parameter used by the mobile terminal to keep the mobile terminal in synchronization.
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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.