Method for concurrently accessing plurality of cells and user equipment

• US 9,986,590 B2
• Filed: 08/11/2014
• Issued: 05/29/2018
• Est. Priority Date: 09/17/2013
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Hwang, Daesung, Yi, Yunjung, Ahn, Joonkui, Seo, Dongyoun
• Primary Examiner(s): Smarth, Gerald
• Application Number:
  US14/914,534
• Publication Number:
  US 20160212786A1
• Time in Patent Office: 1,387 Days
• CPC Class Codes: H04B 7/2656 for structure of frame, burst
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0092 Indication of how the channel is divided
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04W 36/0069 in case of dual connectivity, e.g. decoupled uplink/downlink
• CPC Class Codes: H04W 48/20 Selecting an access point
• CPC Class Codes: H04W 52/281 taking into account user or data type priority
• CPC Class Codes: H04W 52/34 TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
• CPC Class Codes: H04W 52/346 distributing total power among users or channels
• CPC Class Codes: H04W 52/367 Power values between minimum and maximum limits, e.g. dynamic range
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 74/00 Wireless channel access
• CPC Class Codes: H04W 76/15 Setup of multiple wireless link connections
• CPC Class Codes: H04W 76/16 Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer
• CPC Class Codes: H04W 84/045 using private Base Stations, e.g. femto Base Stations, home Node B

Abstract

A method and user equipment (UE) are provided for concurrently accessing a plurality of cells. The UE sets a connection with any one cell corresponding to a primary cell among frequency division duplex (FDD)-based cells and time division duplex (TDD)-based cells, and receives, from the any one cell, first cell indexes for the FDD-based cells and second cell indexes for the TDD-based cells. The UE further sets a connection with a secondary cell indicated by any one index among the first cell indexes and the second cell indexes. At least one value among the first cell indexes overlaps with at least one of the second cell indexes.

Claims

1. A method for concurrently accessing a plurality of cells, the method performed by a user equipment (UE) and comprising:

setting a connection with any one cell corresponding to a primary cell among frequency division duplex (FDD)-based cells and time division duplex (TDD)-based cells;

receiving, from the any one cell, first cell indexes for the FDD-based cells and second cell indexes for the TDD-based cells; and

setting a connection with a secondary cell indicated by any one index among the first cell indexes and the second cell indexes,

wherein at least one value among the first cell indexes overlaps with at least one value of the second cell indexes.

2. The method of claim 1, wherein a value of a cell index for the primary cell is zero (0), which does not overlap with the first cell indexes and the second cell indexes.

3. The method of claim 1, further comprising:

when simultaneous transmission of a physical uplink control channel (PUCCH) and a physical uplink shared channel (PUSCH) is configured, determining whether there are one or more connected FDD-based cells; and

when there are one or more connected FDD-based cells, performing transmission by including the entirety or part of uplink control information (UCI) on a PUSCH of an FDD-based cell having a lowest cell index among the first cell indexes.

4. The method of claim 1, further comprising:

when a sounding reference signal (SRS) is transmitted to the FDD-based cells and the TDD-based cells, distributing determined maximum transmission power to the FDD-based cells and the TDD-based cells;

scaling transmission power distributed for the FDD-based cells; and

scaling transmission power distributed for the TDD-based cells.

5. The method of claim 1, further comprising:

when a sounding reference signal (SRS) is transmitted to the FDD-based cells and the TDD-based cells, allocating determined maximum transmission power to the TDD-based cells; and

allocating remaining transmission power to the FDD-based cells after a previous allocation.

6. The method of claim 1, further comprising:

when a channel state information (CSI) report to be transmitted to the FDD-based cells and a CSI report to be transmitted to the TDD-based cells collide on one subframe, dropping the CSI report to be transmitted to the TDD-based cells, and transmitting the CSI report to the FDD-based cells.

7. A user equipment (UE) capable of concurrently accessing a plurality of cells, the UE comprising:

a wireless transceiver; and

a processor configured to;

control the wireless transceiver to set a connection with any one cell corresponding to a primary cell among frequency division duplex (FDD)-based cells and time division duplex (TDD)-based cells,

control the wireless transceiver to receive, from the any one cell, first cell indexes for the FDD-based cells and second cell indexes for the TDD-based cells, and

control the wireless transceiver to configure a connection with a secondary cell indicated by any one index among the first cell indexes and the second cell indexes,

wherein at least one value among the first cell indexes overlaps with at least one value of the second cell indexes.

8. The UE of claim 7, wherein a value of a cell index for the primary cell is zero (0), which does not overlap with the first cell indexes and the second cell indexes.

9. The UE of claim 7, wherein the processor is further configured to:

determine whether there are one or more connected FDD-based cells, when simultaneous transmission of a physical uplink control channel (PUCCH) and a physical uplink shared channel (PUSCH) is configured; and

perform transmission by including the entirety or part of uplink control information (UCI) on a PUSCH of an FDD-based cell having a lowest cell index among the first cell indexes, when there are one or more connected FDD-based cells.

10. The UE of claim 7, wherein the processor is further configured to:

when a sounding reference signal (SRS) is transmitted to the FDD-based cells and the TDD-based cells, distribute determined maximum transmission power to the FDD-based cells and the TDD-based cells,

scale transmission power distributed for the FDD-based cells, and

scale transmission power distributed for the TDD-based cells.

11. The UE of claim 7, wherein the processor is further configured to:

when a sounding reference signal (SRS) is transmitted to the FDD-based cells and the TDD-based cells, allocate determined maximum transmission power to the TDD-based cells, and

allocate remaining transmission power to the FDD-based cells after a previous allocation.

12. The UE of claim 7, wherein the processor is further configured to:

when a channel state information (CSI) report to be transmitted to the FDD-based cells and a CSI report to be transmitted to the TDD-based cells collide on one subframe, drop the CSI report to be transmitted to the TDD-based cells, and transmit the CSI report to the FDD-based cells.