Device and method for transmitting control channel with pre-allocated resources

• US 8,200,252 B2
• Filed: 02/12/2008
• Issued: 06/12/2012
• Est. Priority Date: 02/16/2007
• Status: Active Grant

• Current Assignee: Beijing Samsung Telecom R&D Center (Samsung Electronics Co. Ltd.), Samsung Electronics Co. Ltd.
• Original Assignee: Beijing Samsung Telecom R&D Center (Samsung Electronics Co. Ltd.), Samsung Electronics Co. Ltd.
• Inventors: Lee, Ju-Ho, Li, Xiaogiang, Li, Yingyang, Zhang, Yujian
• Primary Examiner(s): SHEDRICK, CHARLES TERRELL
• Application Number:
  US12/029,681
• Publication Number:
  US 20080212506A1
• Time in Patent Office: 1,582 Days
• Field of Search: 455/458, 455/452.2, 455/453, 370/329, 370/310, 370/312
• US Class Current: 455/458
• CPC Class Codes: H04W 68/00 User notification, e.g. alerting and paging, for incoming communication, change of service or the like
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/0866 using a dedicated channel for access
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

The method for an eNodeB transmitting control channels with pre-allocated resources comprising steps of the eNodeB determining whether to transmit the control channels according to its needs; the eNodeB transmitting the control channels with pre-allocated resources according to properties of the signaling to be transmitted. With the method proposed in present invention, operations in a receiving end are simplified so that the time spent in receiving signaling is shortened and power consumption is well reduced.

Claims

1. A method for an eNodeB transmitting paging control channels with pre-allocated resources comprising steps of:

a) the eNodeB determining whether to transmit a paging control signaling according to its needs, and

b) the eNodeB transmitting the paging control signaling with pre-allocated resources, by specifying median positions of all downlink L1/L2 control channels as the position to transmit paging control channels, and performing, if the median is not an integer, a rounding process to obtain an integer as the position for the transmission of paging control channel, the rounding process being prescribed and only one process being chosen in a subsequent process.

2. The method according to claim 1, wherein step b) further comprising steps of specifying locations of Xp=Nt*Nd/(Nd+Nu) in all downlink L1/L2 control channels as positions for the transmission of paging control channels, where Nt:

the total number of downlink L1/L2 control channels,

Nd;

the number of downlink scheduling control channels in the downlink L1/L2 control channels,

Nu;

the number of uplink scheduling control channels in the downlink L1/L2 control channels,

and Nt, Nu and Nd are configured dynamically, statically or semi-statically;

if Xp is not an integer, a rounding process is performed to obtain an integer as the position for the transmission of paging control channel, and the rounding process is prescribed and only one process should be chosen in subsequent process.

3. A method for an eNodeB transmitting a message 3 ACK/NACK signaling with pre-allocated resources comprising steps of:

a) the eNodeB determining whether to transmit a uplink access message 3 ACK/NACK signaling according to its needs, and

b) the eNodeB transmitting the uplink access message 3 ACK/NACK signaling with the pre-allocated resources,

wherein the eNodeB explicitly allocates different physical resources for message 3 ACK/NACK channels of each UE.

4. The method according to claim 3, wherein if a logic number of common data ACK/NACK channels starts from a beginning to an end, the eNodeB selects logic numbers for message 3 ACK/NACK channels according to a logic number of control channels from an end to a beginning, and transmits RACH message 3 ACK/NACK information via corresponding physical resource locations.

5. The method according to claim 3, wherein if a logic number of common data ACK/NACK channels starts from a beginning to an end, the eNodeB selects logic numbers for message 3 ACK/NACK channels according to a logic number of control channels from the next one to the ACK/NACK channel that a last common data occupies, and transmits RACH message 3 ACK/NACK information via corresponding physical resource locations.

6. A method for an eNodeB transmitting downlink scheduling channels with pre-allocated resources comprising steps of:

a) the eNodeB determining whether to transmitting a downlink scheduling signaling according to its needs, and

b) the eNodeB transmitting the downlink scheduling signaling with the pre-allocated resources

wherein for a UE referred to as an A-type UE that simultaneously needs an uplink scheduling channel and the downlink scheduling channel, a mapping relationship is specified between locations of the downlink scheduling channel and the uplink scheduling channel.

7. A method for an eNodeB transmitting a uplink scheduling signaling with pre-allocated resources comprising steps of:

a) the eNodeB determining whether to transmit the uplink scheduling signaling according to its needs, and

b) the eNodeB transmitting the uplink scheduling signaling with the pre-allocated resources,

wherein for a UE referred as A-type UE that simultaneously needs the uplink scheduling channel and downlink scheduling channel, a mapping relationship is specified between locations of the downlink scheduling channel and the uplink scheduling channel when the uplink and downlink scheduling channels bear several levels of a Modulation and Coding Scheme (MCS).

8. The method according to claim 7, wherein an order of transmission locations is specified on scheduling a channel for the A-type UE that simultaneously needs the uplink scheduling channel and downlink scheduling channel, for a B-type UE that needs only the downlink scheduling channel and for a C-type UE that needs only the uplink scheduling channel.

9. A device for an eNodeB transmitting control signaling with pre-allocated resources comprising a transmitting/receiving means and further comprising:

a) a control signaling generator, for the eNodeB determining whether to transmit the control signaling;

b) a physical channel multiplexer, for multiplexing the control signaling together with downlink user data to form a physical channel;

c) a control signaling transmission module, for the eNodeB transmitting the control signaling with pre-allocated resources according to properties of the control signaling that needs to be transmitted; and

d) a physical channel de-multiplexer for de-multiplexing uplink user data and uplink control channels,

wherein for a UE referred to as an A-type UE that simultaneously needs the uplink scheduling channel and the downlink scheduling channel, a mapping relationship is specified between locations of the downlink scheduling channel and the uplink scheduling channel.

10. A device for a UE receiving a control signaling transmitted from an eNodeB via pre-allocated resources comprising a transmitting/receiving means and further comprising:

a) a control signaling receiving module, for the UE receiving the control signaling at a prescribed resource location;

b) a physical channel de-multiplexer, for de-multiplexing downlink user data and downlink control channel;

c) a control signaling interpreter, for determining whether the eNodeB transmits control signaling to the UE or not and then processes the control signaling; and

d) a physical channel multiplexer, for multiplexing uplink user data together with a uplink control signaling to form a physical channel,

wherein for a UE referred to as an A-type UE that simultaneously needs the uplink scheduling channel and the downlink scheduling channel, a mapping relationship is specified between locations of the downlink scheduling channel and the uplink scheduling channel.

11. A method for indicating an ACK/NACK channel for a random access message 3 comprising steps of:

a) a UE transmitting a random access preamble;

b) an eNodeB transmitting a random access message 2, to indicate a fundamental ACK/NACK channel transmitted over a downlink, by means of the fundamental ACK/NACK channel, obtaining message 3 ACK/NACK channels corresponding to the preambles implicitly according to orders that responding messages responded by the eNodeB is in the message 2;

c) the UE transmitting the random access message 3 according to a mechanism of HARQ, and the eNodeB transmitting ACK or NACK information over the ACK/NACK channel indicated by the message 2;

and

d) eNodeB transmitting a random access message 4,

wherein the eNodeB explicitly allocates different physical resources for message 3 ACK/NACK channels of each UE.

12. The method according to claim 11, wherein step b) further comprising step of explicitly indicating a fundamental ACK/NACK channel, and this indication information is transmitted through either a PDCCH allocated for message 2 or PDSCH allocated for message 2.

13. The method according to claim 11, wherein step b) further comprising step of implicitly obtaining an index of a fundamental ACK/NACK channel transmitted in the downlink according to an index of a CCE occupied by a downlink PDCCH allocated for message 2.

14. The method according to claim 11, wherein step b) further comprising step of allocating ACK/NACK channels in an ascend order or a descend order starting from a fundamental ACK/NACK channel according to an order of respective response messages of the preambles arranged in message 2.