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 comprising the following steps in a mobile terminal:
transmitting, to a radio base station, a synchronization request for synchronization information;
receiving, from the radio base station, the synchronization information in response to the synchronization request;
transmitting, based on at least one uplink transmission parameter adjusted in accordance with the synchronization information, a resource request for data transmission resources for uplink communications between the mobile terminal and the radio base station; and
using a timer mechanism providing an indication related to a validity of the at least one uplink transmission parameter used by the mobile terminal to keep the mobile terminal in synchronization with the radio base station.
2. The method according to claim 1, comprising the further steps of
receiving, from the radio bae station, resource information in response to the resource request; and
transmitting, to the radio base station, data using resources in accordance with the resource information.
3. The method according to claim 2, comprising the step of transmitting, in case further data is to be transmitted, at least one further resource request to the radio base station.
4. The method according to claim 1, wherein using the timer mechanism comprises starting a synchronization timer in response to at least one of the reception of the synchronization information and a transmission of data to the radio base station based on the at least one uplink transmission parameter.
5. The method according to claim 4, wherein the synchronization timer is set according to a measured velocity of the mobile terminal.
6. The method according to claim 4, wherein a further synchronization request is transmitted on expiry of the synchronization timer.
7. The method according to claim 1, comprising the further step of transmitting at least one ping signal for maintaining synchronization.
8. The method according to claim 7, wherein the ping signal comprises signaling data.
9. The method according to claim 7, wherein the ping signal is transmitted on expiry of a synchronization timer.
10. The method according to claim 7, wherein the ping signal is transmitted in response to a polling request received over the radio interface.
11. A method of performing a random access procedure over a radio interface, the method comprising the following steps in a radio base station:
receiving, from a mobile terminal, a synchronization request for synchronization information;
transmitting, based on the synchronization request, the synchronization information to the mobile terminal; and
receiving, based on at least one uplink transmission parameter adjusted according to the synchronization information, a resource request for data transmission resources for uplink communication between the mobile terminal and the radio base station; and
using a timer mechanism providing an indication related to a validity of the at least one uplink transmission parameter used by the mobile terminal to keep the mobile terminal in synchronization with the radio base station.
12. The method according to claim 11, comprising the further steps of
transmitting, to the mobile terminal, resource information in response to the resource request; and
scheduling resources according to the resource information.
13. The method according to claim 11, comprising the step of receiving at least one further resource request from the mobile terminal.
14. The method according to claim 11, wherein using the timer mechanism comprises starting a synchronization timer in response to at least one of receiving the synchronization request, receiving the resource request, and receiving data from the mobile terminal based on the at least one uplink transmission parameter.
15. The method according to claim 14, comprising the step of transmitting, on expiry of the synchronization timer, a request for a ping signal.
16. A non-transitory computer readable recording medium storing a computer program product comprising program code portions that is executed on one or more computing devices to cause the one or more computing devices to:
transmit, to a radio base station, a synchronization request for synchronization information;
receive, from the radio base station, the synchronization information in response to the synchronization request;
transmit, based on at least one uplink transmission parameter adjusted in accordance with the synchronization information, a resource request for data transmission resources for uplink communications between a mobile terminal and the radio base station; and
using a timer mechanism providing an indication related to a validity of the at least one uplink transmission parameter used by the mobile terminal to keep the mobile terminal in synchronization with the radio base station.
17. A mobile terminal for performing a random access procedure over a radio interface, the mobile terminal comprising:
one or more processors coupled to a memory, the one or more processors configured to:
transmit, to a radio base station, a synchronization request for synchronization information;
receive, from the radio base station, the synchronization information in response to the synchronization request;
transmit, based on at least one uplink transmission parameter adjusted according to the synchronization information, a resource request for data transmission resources for uplink communications between the mobile terminal and the radio base station; and
use a timer mechanism providing an indication related to a validity of the at least one transmission parameter used by the mobile terminal to keep the mobile terminal in synchronization with the radio base station.
18. A radio base station for performing a random access procedure over a radio interface, the base station comprising:
one or more processors coupled to a memory, the one or more processors configured to:
receive, from a mobile terminal, a synchronization request for synchronization information;
transmit, based on the synchronization request, the synchronization information to the mobile terminal; and
receive, based on at least one transmission parameter adjusted according to the synchronization information, a resource request for data transmission resources for uplink communication between the mobile terminal and the radio base station; and
use a timer mechanism providing an indication related to a validity of the at least one uplink transmission parameter used by the mobile terminal to keep the mobile terminal in synchronization with the radio base station.
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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.