Physical layer operation for multi-layer operation in a wireless system

Patent metadata

Field	Value
Publication number	US-9699779-B2
Application number	US-201313974911-A
Country	US
Kind code	B2
Filing date	Aug 23, 2013
Priority date	Aug 23, 2012
Publication date	Jul 4, 2017
Grant date	Jul 4, 2017

Abstract

Methods and systems are disclosed for providing physical layer resources to a plurality of medium access control (MAC) instances that are associated with different serving sites that are independently scheduled. For example, a WTRU may utilize a first physical layer configuration for transmitting to a first serving site associated with a first MAC instance. The WTRU may utilize a second physical layer configuration for transmitting to a second serving site associated with a second MAC instance. The WTRU may prevent conflicts between transmission requests from the first MAC instance and transmission requests from the second MAC instance. For example, preventing the conflicts may include utilizing one or more of time segregation or frequency segregation for transmissions associated with the first MAC instance and transmissions associated with the second MAC instance.

First claim

What is claimed:

1. A method for providing physical layer resources to a plurality of medium access control (MAC) instances, the method comprising:
a wireless transmit receive unit (WTRU) utilizing a first physical layer configuration for sending a first transmission to a first serving site in accordance with a first uplink grant received from the first serving site, a first MAC instance being associated with a first group of one or more cells served by the first serving site;
the WTRU utilizing a second physical layer configuration for sending a second transmission to a second serving site in accordance with a second uplink grant received from the second serving site, a second MAC instance being associated with a second group of one or more cells served by the second serving site; and
the WTRU allocating at least a portion of transmission power between the first transmission associated with the first MAC instance sent to the first serving site and the second transmission associated with the second MAC instance sent to the second serving site based on tiered priority rules, wherein a first tier priority rule comprises prioritizing transmissions that include uplink control information (UCI) over transmissions that do not include UCI, a second tier priority rule comprises prioritizing transmissions including a first type of UCI over transmissions including a second type of UCI, and a third tier priority rule comprises prioritizing transmissions associated with cells corresponding to a primary MAC instance over transmissions associated with cells corresponding to a secondary MAC instance.

2. The method as in claim 1 , wherein the first transmission includes the first type of UCI, the second transmission includes the second type of UCI, and the first transmission is given a higher priority when allocating at least the portion of the transmission power between the first transmission and the second transmission based on the first transmission including the first type of UCI and the second transmission including the second type of UCI.

3. The method as in claim 2 , wherein transmission power to be allocated to the second transmission is scaled based on the first transmission being given higher priority than the second transmission.

4. The method as in claim 1 , wherein the first transmission and the second transmission include a same type of UCI, the first MAC instance corresponds to a primary MAC instance, the second MAC instance corresponds to a secondary MAC instance, and the first transmission is prioritized over the second transmission when allocating at least the portion of transmission power based on the first MAC instance corresponding to the primary MAC instance and the second MAC instance corresponding to the secondary MAC instance.

5. The method as in claim 1 , wherein the first transmission and the second transmission are performed on different frequency bands.

6. The method as in claim 5 , wherein the WTRU is configured with a maximum transmit power for transmissions overlapping at least in part in time that are associated with the first and second MAC instances.

7. The method as in claim 1 , wherein the WTRU is configured with a maximum transmit power for transmitting to one or more of the first group of one or more cells associated with the first MAC instance or the second group of one or more cells associated with the second MAC instance.

8. The method as in claim 7 , further comprising determining that transmitting according to the first uplink grant for the first group of one or more cells associated with the first MAC instance and transmitting according to the second uplink grant for the second group of one or more cells associated with the second MAC instance would result in the WTRU exceeding the maximum transmit power unless at least one of the transmission power to be allocated for the first transmission or the transmission power to be allocated for the second transmission is scaled.

9. The method as in claim 1 , further comprising scaling one or more of power allocated for the first transmission or power allocated for the second transmission based on the tiered priority rules, wherein at least the power allocated to the second transmission is scaled based on the second transmission including UCI that is associated with a lower priority than the UCI included in the first transmission.

10. The method as in claim 9 , wherein scaling the power allocated for the second transmission comprises allocating power first to the first transmission, and allocating remaining power up to the maximum transmit power to the second transmissions.

11. The method as in claim 2 , wherein the first type of UCI corresponds to hybrid automatic repeat request (HARQ) ACK/NACK feedback, the second type of UCI corresponds to channel state information (CSI) feedback, and first transmission including the HARQ ACK/NACK feedback is prioritized over the second transmission including the CSI feedback.

12. The method as in claim 9 , wherein a first group of one or more cells is utilized by the WTRU for performing carrier aggregation transmissions to the first serving site and the second group of one or more cells is utilized by the WTRU for performing carrier aggregation transmissions to the second serving site.

13. A wireless transmit receive unit (WTRU) comprising:
a plurality of medium access control (MAC) instances, wherein the plurality of MAC instances comprise a first MAC instance associated with a first group of one or more cells and a second MAC instance associated with a second group of one or more cells;
a physical layer entity configured to:
operate using a first physical layer configuration for sending a first transmission to a first serving site in accordance with a first uplink grant applicable to the first MAC instance, the first uplink grant being received from the first serving site,
operate using a second physical layer configuration for sending a second transmission to a second serving site in accordance with a second uplink grant applicable to the second MAC instance, the second uplink grant being received from the second serving site, and
allocate at least a portion of transmission power between the first transmission associated with the first MAC instance sent to the first serving site and the second transmission associated with the second MAC instance sent to the second serving site based on tiered priority rules, wherein a first tier priority rule comprises prioritizing transmissions that included uplink control information (UCI) over transmissions that do not include UCI, a second tier priority rule comprises prioritizing transmissions including a first type of UCI over transmissions including a second type of UCI, and a third tier priority rule comprises prioritizing transmissions associated with cells corresponding to a primary MAC instance over transmissions associated with cells corresponding to a secondary MAC instance.

14. The WTRU as in claim 13 , wherein the first MAC instance and the second MAC instance utilize non-synchronous subframe timing such that portions of transmissions to the first group of one or more cells associated with the first MAC instance partially overlap with portions of transmissions to the second group of one or more cells associated with the second MAC instance.

15. The WTRU as in claim 13 , wherein the first transmission includes the first type of UCI, the second transmission includes the second type of UCI, and the physical layer entity is configured to prioritize the first transmission including the first type of UCI over the second transmission that including the second type of UCI when a

Assignees

• Interdigital Patent Holdings Inc

Inventors

• Marinier Paul
• Tooher J Patrick
• Pelletier Ghyslain
• Pani Diana

Classifications

• H04W52/146

  Uplink power control · CPC title

• H04W88/06

  adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals · CPC title

• H04W52/281

  taking into account user or data type priority · CPC title

• H04B7/024

  Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems · CPC title

• H04W72/044 Primary

  based on the type of the allocated resource · CPC title