Apparatus and method for transceiving information on an uplink timing group in a wireless communication system
View Patent ↗A method for transmitting information on an uplink timing group includes performing RACH procedures with user equipment for a preset period of time to generate an uplink timing group, and transmitting, to the user equipment, a message including information on the configuration of the thus-generated uplink timing group, wherein said uplink timing group is a group of one or more component carriers to which identical uplink timing correction is applied.
1. A method of transmitting information associated with an uplink timing group, the method comprising:
receiving, by an evolved Node-B from a user equipment, a message requesting configuration of an uplink timing group;
performing random access (RACH) with the user equipment during a predetermined period of time, so as to generate an uplink timing group; and
transmitting, to the user equipment, a message including information associated with a configuration associated with the generated uplink timing group,
wherein the uplink timing group corresponds to a set of one or more component carriers to which identical uplink timing advance is applied.
2. The method as claimed in claim 1 , wherein the message requesting configuration of the uplink timing group comprises indication information of 1 bit that indicates whether an initial configuration of the uplink timing group is required or whether updating of uplink timing group information is required.
3. The method as claimed in claim 1 , wherein the message including the information associated with the configuration of the uplink timing group comprises information indicating that the message is an uplink timing group configuration message, group indication information identifying each uplink timing group, and identification information associated with one or more component carriers included in a correspond uplink timing group.
4. The method as claimed in claim 1 , wherein the message including the information associated with the configuration of the uplink timing group comprises indication information determined to be identification information associated with a corresponding uplink timing group from among combinations associated with an uplink timing group determined based on a number of configured uplink component carriers of the user equipment, and identification information associated with one or more component carriers included in each uplink timing group.
5. The method as claimed in claim 1 , wherein the random access performing step starts operation of a timer for configuring an uplink timing group, after receiving the message requesting configuration of the uplink timing group, and performing random access (RACH) with the user equipment during the predetermined period of time.
6. A method of receiving information associated with an uplink timing group, the method comprising:
transmitting, by a user equipment to an evolved Node-B, a message requesting configuration of an uplink timing group;
performing random access (RACH) with the evolved Node-B during a predetermined period of time;
receiving information associated with a configuration of an uplink timing group from the evolved Node-B; and
performing uplink timing advance in accordance with a corresponding uplink timing group based on the received information associated with the configuration of the uplink timing group,
wherein the uplink timing group corresponds to a set of one or more component carriers to which identical uplink timing advance is applied.
7. The method as claimed in claim 6 , wherein the message requesting configuration of the uplink timing group comprises indication information of 1 bit that indicates whether an initial configuration of the uplink timing group is required or updating of uplink timing group information is required.
8. The method as claimed in claim 6 , wherein the message including information associated with the configuration of the uplink timing group comprises information indicating that the message is an uplink timing group configuration message, group indication information identifying each uplink timing group, and identification information associated with one or more component carriers included in a corresponding uplink timing group.
9. The method as claimed in claim 6 , wherein the message including the information associated with the configuration of the uplink timing group comprises indication information determined to be identification information associated with a corresponding uplink timing group from among combinations associated with an uplink timing group determined based on a number of configured uplink component carriers of the user equipment, and identification information associated with one or more component carriers included in each uplink timing group.
10. The method as claimed in claim 6 , wherein performing of random access (RACH) with the evolved Node-B during the predetermined period of time comprises:
randomly performing RACH through a component carrier included in the uplink timing group, or sequentially performing RACH in a predetermined order, or simultaneously performing RACH.
11. The method as claimed in claim 6 , wherein performing of uplink timing advance comprises:
setting a delegate component carrier of the uplink timing group,
wherein one of a component carrier having a lowest center frequency value, a component carrier having a center frequency value closest to a mean value, a component carrier having a highest center frequency value, a component carrier having a broadest frequency band, and a component carrier set for monitoring a downlink quality is selected to be the delegate component carrier from among component carriers included in the uplink timing group.
12. The method as claimed in claim 11 , wherein performing of uplink timing advance comprises:
receiving an uplink timing advance value associated with the uplink timing group through the set delegate component carrier; and
updating the uplink timing group based on the received uplink timing advance value.
13. The method as claimed in claim 6 , wherein transmitting of the message requesting configuration of the uplink timing group to the evolved Node-B comprises:
determining whether the user equipment corresponds to one of a case in which a response to uplink transmission data does not exist through a few uplink component carriers of the uplink timing group, a case in which resetting of a downlink synchronization is requested by the evolved Node-B, a case in which an alignment timer set for each component carrier expires, a case in which an alignment timer set by the user equipment expires, a case in which a downlink/uplink connection setup is changed, and a case in which the user equipment performs a handover.
14. An apparatus for transmitting information associated with an uplink timing group, the apparatus comprising:
a transceiving unit to receive, from a user equipment a message requesting configuration of an uplink timing group;
an uplink timing group configuring unit to generate an uplink timing group by performing random access (RACH) with the user equipment during a predetermined period of time; and
a controller to control the transceiving unit to transmit a message including information associated with a configuration of the generated uplink timing group to the user equipment,
wherein the uplink timing group corresponds to a set of one or more component carriers to which identical uplink timing advance is applied.
15. The apparatus as claimed in claim 14 , wherein the message requesting configuration of the uplink timing group comprises indication information of 1 bit that indicates whether an initial configuration of the uplink timing group is required or whether updating of uplink timing group information is required.
16. The apparatus as claimed in claim 14 , wherein the message including the information associated with the configuration of the uplink timing group comprises information indicating that the message is an uplink timing group configuration message, group indication information identifying each uplink timing group, and identification information associated with one or more component carriers included in a corresponding uplink timing group.
17. The apparatus as claimed in claim 14 , wherein the message including the information associated with the configuration of the uplink timing group comprises indication information determined to be identification information associated with a corresponding uplink timing group from among combinations associated with an uplink timing group determined based on a number of configured uplink component carriers of the user equipment and identification information associated with one or more component carriers included in each uplink timing group.
18. The apparatus as claimed in claim 14 , wherein the apparatus starts operation of a timer for configuring the uplink timing group after receiving the message requesting configuration of the uplink timing group, and performs random access (RACH) with the user equipment during the predetermined period of time.
19. An apparatus for receiving information associated with an uplink timing group, the apparatus comprising:
a transceiving unit to transmit, to an evolved Node-B, a message requesting configuration of an uplink timing group; and
a controller to perform random access (RACH) with the evolved Node-B during a predetermined period of time,
wherein the transceiving unit receives information associated with a configuration of an uplink timing group from the evolved Node-B;
the controller performs uplink timing advance in accordance with a corresponding uplink timing group based on information associated with the received information associated with the configuration of the uplink timing group; and
the uplink timing group corresponds to a set of one or more component carriers to which identical uplink timing advance is applied.
20. The apparatus as claimed in claim 19 , wherein the message requesting configuration of the uplink timing group comprises indication information of 1 bit that indicates whether an initial configuration of the uplink timing group is required or whether updating of uplink timing group information is required.
21. The apparatus as claimed in claim 19 , wherein the message including the information associated with the configuration of the uplink timing group comprises information indicating that the message is an uplink timing group configuration message, group indication information identifying each uplink timing group, and identification information associated with one or more component carriers included in a corresponding uplink timing group.
22. The apparatus as claimed in claim 19 , wherein the message including the information associated with the configuration of the uplink timing group comprises indication information determined to be identification information associated with a corresponding timing group from among combinations associated with an uplink timing group determined based on a number of configured uplink component carriers of the user equipment and identification information associated with one or more component carriers included in each uplink timing group.
23. The apparatus as claimed in claim 19 , wherein, when the controller performs random access (RACH) with the evolved Node-B during the predetermined period of time, the controller randomly performs RACH through a component carrier included in the uplink timing group, or sequentially performs RACH in a predetermined order, or simultaneously performs RACH.
24. The apparatus as claimed in claim 19 , wherein, when the controller performs uplink timing advance, the controller sets a delegate component carrier associated with the uplink timing group, and one of a component carrier having a lowest center frequency value, a component carrier having a center frequency value closest to a mean value, a component carrier having a highest center frequency value, a component carrier having a broadest frequency band, and a component carrier set for monitoring a downlink quality is selected to be the delegate component carrier from among component carriers included in the uplink timing group.
25. The apparatus as claimed in claim 24 , wherein the controller performs:
controlling the transceiving unit to receive an uplink timing advance value associated with the uplink timing group through the set delegate component carrier; and
updating the uplink timing group based on the received uplink timing advance value.
26. The apparatus as claimed in claim 19 , wherein, when the transceiving unit transmits the message requesting configuration of the uplink timing group to the evolved Node-B, the controller determines whether the user equipment corresponds to one of a case in which a response with respect to uplink transmission data does not exist through a few uplink component carriers of the uplink timing group, a case in which resetting of a downlink synchronization is requested by the evolved Node-B, a case in which an alignment timer set for each component carrier expires, a case in which an alignment timer set by the user equipment expires, a case in which a downlink/uplink connection setup is changed, and a case in which the user equipment performs a handover.