Mitigation of performance degradation
US-2024389043-A1 · Nov 21, 2024 · US
Maintaining time alignment with multiple uplink carriers
US8934459B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8934459-B2 |
| Application number | US-98654911-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 7, 2011 |
| Priority date | Jan 8, 2010 |
| Publication date | Jan 13, 2015 |
| Grant date | Jan 13, 2015 |
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Abstract
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Maintaining time alignment with multiple carriers is contemplated. A group of uplink carriers (UL CC sets) that operate with a single Timing Advance (TA) may be determined, and a TA value may be applied to a specific UL CC set. A wireless transmit/receive unit's (WTRU) capability of using multiple TAs may define a group index of a few bits for each UL CC set. A TA Command received in a Random Access Response message may be used to apply the TA value to each UL carrier of the UL CC set. The WTRU may determine which UL CC set the TA value applies to based on which DL carrier the command was transmitted from. The WTRU may determine which UL CC set the TA value applies to based on the Group Index being explicitly provided in the command. The WTRU may release multi-CC configurations upon Time Alignment Timer (TAT) expiry.
First claim
Opening claim text (preview).
What is claimed is: 1. A wireless transmit/receive unit (WTRU), comprising: a processor, the processor configured, at least in part to: identify one or more uplink carriers with which the WTRU is operating; determine one or more sets of serving cells with at least two configured uplink component carrier sets (UL CC sets), each of the at least two UL CC sets comprising one or more of the uplink carriers, each of the one or more uplink carriers that comprise a respective UL CC se…
Assignees
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Classifications
- H04L5/001Primary
Electricity · mapped topic
Electricity · mapped topic
- H04L27/2646Primary
Electricity · mapped topic
- H04W56/0005Primary
Electricity · mapped topic
Electricity · mapped topic
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- What does patent US8934459B2 cover?
- Maintaining time alignment with multiple carriers is contemplated. A group of uplink carriers (UL CC sets) that operate with a single Timing Advance (TA) may be determined, and a TA value may be applied to a specific UL CC set. A wireless transmit/receive unit's (WTRU) capability of using multiple TAs may define a group index of a few bits for each UL CC set. A TA Command received in a Random A…
- Who is the assignee on this patent?
- Marinier Paul, Anepu Bhaskar M, Pelletier Ghyslain, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification H04L5/001. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jan 13 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).