# US 10,374,783 B2 · Scheduling timing design for a TDD system

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- Number: US 10,374,783 B2
- Document ID: US10374783B2
- Status: Granted
- Kind: B2
- Application number: 15/594,267
- Filed: 2017-05-12
- Published: 2017-08-31
- Granted: 2019-08-06
- Earliest claimed: 2012-03-16
- Assignees: Intel Corporation
- Applicants: Intel Corporation
- Inventors: Hong He; Jong-Kae Fwu; Rui Huang
- Web page: https://patentgrep.com/patent/US10374783B2

## CPC

- H04L 1/0077: {Cooperative coding}
- H04L 1/0033: {arrangements specific to the transmitter}
- H04L 1/08: by repeating transmission, e.g. Verdan system {(H04L1/1858 and H04L1/189 take precedence)}
- H04L 1/1607: Details of the supervisory signal
- H04L 1/1635: {Cumulative acknowledgement, i.e. the acknowledgement message applying to all previous messages}
- H04L 1/1812: Hybrid protocols; Hybrid automatic repeat request [HARQ]
- H04L 1/1825: Adaptation of specific ARQ protocol parameters according to transmission conditions
- H04L 1/1854: {Scheduling and prioritising arrangements}
- H04L 1/1861: {Physical mapping arrangements (for ACK signaling see also H04L5/0053)}
- H04L 1/1864: {ARQ related signaling (H04L1/1607 takes precedence)}
- H04L 1/1877: {for semi-reliable protocols, e.g. for less sensitive applications like streaming video (buffer level management for video bitstream control arrangements H04N21/44004)}
- H04L 1/1887: {Scheduling and prioritising arrangements}
- H04L 1/189: {Transmission or retransmission of more than one copy of a message}
- H04L 1/1896: {ARQ related signaling}
- H04L 5/001: {the frequencies being arranged in component carriers}
- H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals}
- H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)}
- H04L 5/0073: {Allocation arrangements that take into account other cell interferences}
- H04L 5/14: Two-way operation using the same type of signal, i.e. duplex
- H04L 5/1438: {Negotiation of transmission parameters prior to communication (modified according to link quality H04L1/0001)}
- H04L 5/1446: {of transmission speed}
- H04L 5/1469: {using time-sharing}
- H04L 12/189: {in combination with wireless systems (selective distribution or broadcast in wireless communication networks H04W4/06)}
- H04L 12/2854: {Wide area networks, e.g. public data networks}
- H04L 47/283: in response to processing delays, e.g. caused by jitter or round trip time [RTT]
- H04L 47/6275: based on priority
- H04L 65/752: adapting media to network capabilities
- H04L 65/756: adapting media to device capabilities
- H04L 67/02: based on web technology, e.g. hypertext transfer protocol [HTTP]
- H04L 67/568: Storing data temporarily at an intermediate stage, e.g. caching
- H04N 21/25841: {involving the geographical location of the client (retrieval from the Internet by querying based on geographical locations G06F16/9537; arrangements for identifying locations of receiving stations in broadcast systems H04H60/51; location of the user terminal in data switching networks H04L67/52; services making use of the location of users or terminals in wireless networks H04W4/02; locating users or terminals in wireless networks H04W64/00)}
- H04N 21/41407: {embedded in a portable device, e.g. video client on a mobile phone, PDA, laptop (constructional details of equipment or arrangements specially adapted for portable computer application G06F1/1626; arrangements specially adapted for mobile receivers in broadcast systems H04H20/57)}
- H04N 21/6405: Multicasting {(data broadcast and multicast in packet switching networks H04L12/18)}
- H04N 21/6408: Unicasting
- H04W 4/06: Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
- H04W 16/04: Traffic adaptive resource partitioning
- H04W 24/00: Supervisory, monitoring or testing arrangements
- H04W 24/02: Arrangements for optimising operational condition
- H04W 28/0236: {radio quality, e.g. interference, losses or delay}
- H04W 28/0268: {using specific QoS parameters for wireless networks, e.g. QoS class identifier [QCI] or guaranteed bit rate [GBR] (negotiating SLA or negotiating QoS H04W28/24)}
- H04W 28/0278: {using buffer status reports (dynamic wireless traffic scheduling definition H04W72/12)}
- H04W 52/02: Power saving arrangements
- H04W 52/0206: {in access points, e.g. base stations}
- H04W 52/0209: {in terminal devices}
- H04W 52/0235: {where the received signal is a power saving command}
- H04W 52/243: {taking into account interferences}
- H04W 72/04: Wireless resource allocation
- H04W 72/12: Wireless traffic scheduling
- H04W 72/1273: of downlink data flows
- H04W 72/20: Control channels or signalling for resource management
- H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network
- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- H04W 72/27: between access points
- H04W 72/51: based on terminal or device properties
- H04W 72/541: using the level of interference
- H04W 72/569: {of the traffic information}
- H04W 74/085: {collision avoidance}
- H04W 76/27: Transitions between radio resource control [RRC] states
- H04W 76/28: Discontinuous transmission [DTX]; Discontinuous reception [DRX]
- H04J 11/0073: {Acquisition of primary synchronisation channel, e.g. detection of cell-ID within cell-ID group}
- H04L 1/1819: {with retransmission of additional or different redundancy}
- H04W 52/0229: {where the received signal is a wanted signal}
- H04W 52/143: {Downlink power control}
- H04W 72/0446: Resources in time domain, e.g. slots or frames
- H04W 72/1268: of uplink data flows
- Y02D 30/70: in wireless communication networks
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S)
- Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE

## Abstract

Disclosed is a method of transmitting, from an enhanced Node B (eNB), an indication of an uplink/downlink (UL-DL) subframe configuration of a scheduling cell and a scheduled cell in a wireless time-division duplex (TDD) system. Embodiments include identifying the type of the UL-DL subframe configuration of the scheduling cell and determining a UL-DL subframe configuration to use for UL resource allocation of the scheduled cell. Other embodiments include identifying a reference UL-DL subframe configuration to use for UL resource allocation of the scheduled cell.

## Claims

### Claim 1

A system comprising:
a receiver to receive, at a user equipment (UE), an indication of an uplink/downlink (UL-DL) subframe configuration of a scheduling cell in a wireless time-division duplex (TDD) system that utilizes cross-carrier scheduling;
the receiver further to receive an indication of a UL-DL subframe configuration of a scheduled cell in the wireless TDD system, the UL-DL subframe configuration of the scheduled cell being different from the UL-DL subframe configuration of the scheduling cell; and
a processor to identify a reference UL-DL subframe configuration based at least in part on the UL-DL subframe configurations of the scheduling cell and scheduled cell;
wherein the receiver is further to receive, from the scheduling cell of an enhanced NodeB (eNB), a hybrid automatic repeat request (HARD) signal of the scheduled cell according to a subframe timing of the reference UL-DL subframe configuration; and
wherein:
the reference UL-DL subframe configuration is equal to 6 if the UL-DL subframe configuration of the scheduling cell is equal to 1, 2, 3, or 4, and the UL-DL subframe configuration of the scheduled cell is equal to 6;
the reference UL-DL subframe configuration is equal to 0 if the UL-DL subframe configuration of the scheduling cell is equal to 3 or 4, and the UL-DL subframe configuration of the scheduled cell is equal to 0; and
the reference UL-DL subframe configuration is equal to 1 if the UL-DL subframe configuration of the scheduling cell is equal to 4 and the UL-DL subframe configuration of the scheduled cell is equal to 1.

### Claim 2 (depends on 1)

The system of claim 1, wherein:
the reference UL-DL subframe configuration is equal to 1 if the UL-DL subframe configuration of the scheduling cell is equal to 1 and the UL-DL subframe configuration of the scheduled cell is equal to 2, 4, or 5;
the reference UL-DL subframe configuration is equal to 2 if the UL-DL subframe configuration of the scheduling cell is equal to 2 and the UL-DL subframe configuration of the scheduled cell is equal to 5;
the reference UL-DL subframe configuration is equal to 3 if the UL-DL subframe configuration of the scheduling cell is equal to 3 and the UL-DL subframe configuration of the scheduled cell is equal to 4 or 5; and
the reference UL-DL subframe configuration is equal to 4 if the UL-DL subframe configuration of the scheduling cell is equal to 4 and the UL-DL subframe configuration of the scheduled cell is equal to 5.

### Claim 3 (depends on 1)

The system of claim 1, wherein:
the reference UL-DL subframe configuration is equal to 3 if the UL-DL subframe configuration of the scheduling cell is equal to 2 and the UL-DL subframe configuration of the scheduled cell is equal to 3; and
the reference UL-DL subframe configuration is equal to 4 if the UL-DL subframe configuration of the scheduling cell is equal to 2 and the UL-DL subframe configuration of the scheduled cell is equal to 4.

### Claim 4 (depends on 1)

The system of claim 1, wherein:
the reference UL-DL subframe configuration is equal to 0 if the UL-DL subframe configuration of the scheduling cell is equal to 6 and the UL-DL subframe configuration of the scheduled cell is equal to 0;
the reference UL-DL subframe configuration is equal to 1 if the UL-DL subframe configuration of the scheduling cell is equal to 0 or 6, and the UL-DL subframe configuration of the scheduled cell is equal to 1, 2, or 5;
the reference UL-DL subframe configuration is equal to 3 if the UL-DL subframe configuration of the scheduling cell is equal to 0 or 6, and the UL-DL subframe configuration of the scheduled cell is equal to 3;
the reference UL-DL subframe configuration is equal to 6 if the UL-DL subframe configuration of the scheduling cell is equal to 0 and the UL-DL subframe configuration of the scheduled cell is equal to 6; and
the reference UL-DL subframe configuration is equal to 4 if the UL-DL subframe configuration of the scheduling cell is equal to 6 and the UL-DL subframe configuration of the scheduled cell is equal to 4.

### Claim 5 (depends on 1)

The system of claim 1, wherein the scheduled cell is a secondary serving cell, and wherein the scheduling cell is a primary service cell or another secondary serving cell.

### Claim 6 (depends on 1)

The system of claim 1, wherein the receiver is further to receive an identification of the reference UL-DL subframe configuration via one or more radio resource control (RRC) signals.

### Claim 7 (depends on 1)

The system of claim 1, wherein the processor is further to identify the reference UL-DL subframe configuration via a table stored in a memory of the UE.

### Claim 8 (depends on 1)

The system of claim 1, wherein at least one of the UL-DL subframe configuration of the scheduled cell, the UL-DL subframe configuration of the scheduling cell, and the reference UL-DL subframe configuration correspond to one of TDD UL-DL configurations 0-6 associated with 3rd Generation Partnership Project's (3GPP's) long-term evolution (LTE) advanced wireless communication standard; and
wherein the system is a mobile phone, a netbook, a laptop, an electronic tablet, or a data system of a vehicle.

### Claim 9 (depends on 1)

The system of claim 1, wherein the receiver is further to receive the HARQ signal of the scheduled cell in a downlink subframe of the scheduling cell; and
wherein the HARQ signal comprises a positive or negative acknowledgement signal.

### Claim 10 (depends on 1)

The system of claim 1, wherein the indication of the UL-DL subframe configuration of the scheduling cell is received in a system information block of a signal of the scheduling cell.

### Claim 11

An enhanced NodeB (eNB) comprising:
a processor to:
determine respective uplink/downlink (UL-DL) subframe configurations of a scheduling cell and a scheduled cell in a wireless time-division duplex (TDD) system that utilizes cross-carrier scheduling, the UL-DL subframe configuration of the scheduled cell being different from the UL-DL subframe configuration of the scheduling cell; and
determine a reference UL-DL subframe configuration based at least in part on the UL-DL subframe configurations of the scheduling cell and the scheduled cell; and
a transmitter to transmit to a user equipment (UE):
an indication of the UL-DL subframe configuration of the scheduling cell;
an indication of the UL-DL subframe configuration of the scheduled cell; and
an indication of the reference UL-DL subframe configuration;
wherein the transmitter is further to transmit a hybrid automatic repeat request (HARQ) signal comprising a positive or negative acknowledgement signal of the scheduled cell in a downlink subframe of the scheduling cell; and
wherein:
the reference UL-DL subframe configuration is equal to 1 if the UL-DL subframe configuration of the scheduling cell is equal to 1 and the UL-DL subframe configuration of the scheduled cell is equal to 2, 4, or 5;
the reference UL-DL subframe configuration is equal to 2 if the UL-DL subframe configuration of the scheduling cell is equal to 2 and the UL-DL subframe configuration of the scheduled cell is equal to 5;
the reference UL-DL subframe configuration is equal to 3 if the UL-DL subframe configuration of the scheduling cell is equal to 3 and the UL-DL subframe configuration of the scheduled cell is equal to 4 or 5;
the reference UL-DL subframe configuration is equal to 4 if the UL-DL subframe configuration of the scheduling cell is equal to 4 and the UL-DL subframe configuration of the scheduled cell is equal to 5;
the reference UL-DL subframe configuration is equal to 6 if the UL-DL subframe configuration of the scheduling cell is equal to 1, 2, 3, or 4, and the UL-DL subframe configuration of the scheduled cell is equal to 6.

### Claim 12 (depends on 11)

The eNB of claim 11, wherein the indication of the reference UL-DL subframe configuration is transmitted in radio resource control (RRC) signaling.

### Claim 13 (depends on 11)

The eNB of claim 11, wherein the scheduled cell is a secondary serving cell, and wherein the scheduling cell is a primary service cell or another secondary serving cell.

### Claim 14 (depends on 11)

The eNB of claim 11, wherein at least one of the UL-DL subframe configuration of the scheduled cell, the UL-DL subframe configuration of the scheduling cell, and the reference UL-DL subframe configuration are one of TDD UL-DL configurations 0-6 associated with 3rd Generation Partnership Project's (3GPP's) long-term evolution (LTE) advanced wireless communication standard.

### Claim 15 (depends on 11)

The eNB of claim 11, wherein:
the reference UL-DL subframe configuration is equal to 0 if the UL-DL subframe configuration of the scheduling cell is equal to 3 or 4, and the UL-DL subframe configuration of the scheduled cell is equal to 0;
the reference UL-DL subframe configuration is equal to 1 if the UL-DL subframe configuration of the scheduling cell is equal to 4 and the UL-DL subframe configuration of the scheduled cell is equal to 1;
the reference UL-DL subframe configuration is equal to 3 if the UL-DL subframe configuration of the scheduling cell is equal to 2 and the UL-DL subframe configuration of the scheduled cell is equal to 3;
the reference UL-DL subframe configuration is equal to 4 if the UL-DL subframe configuration of the scheduling cell is equal to 2 and the UL-DL subframe configuration of the scheduled cell is equal to 4;
the reference UL-DL subframe configuration is equal to 0 if the UL-DL subframe configuration of the scheduling cell is equal to 6 and the UL-DL subframe configuration of the scheduled cell is equal to 0;
the reference UL-DL subframe configuration is equal to 1 if the UL-DL subframe configuration of the scheduling cell is equal to 0 or 6, and the UL-DL subframe configuration of the scheduled cell is equal to 1, 2, or 5;
the reference UL-DL subframe configuration is equal to 3 if the UL-DL subframe configuration of the scheduling cell is equal to 0 or 6, and the UL-DL subframe configuration of the scheduled cell is equal to 3;
the reference UL-DL subframe configuration is equal to 6 if the UL-DL subframe configuration of the scheduling cell is equal to 0 and the UL-DL subframe configuration of the scheduled cell is equal to 6; and
the reference UL-DL subframe configuration is equal to 4 if the UL-DL subframe configuration of the scheduling cell is equal to 6 and the UL-DL subframe configuration of the scheduled cell is equal to 4.

### Claim 16

One or more non-transitory computer-readable media comprising instructions to cause a user equipment (UE), upon execution of the instructions by one or more processors of the UE, to:
receive an indication of an uplink/downlink (UL-DL) subframe configuration of a scheduling cell in a wireless time-division duplex (TDD) system that utilizes cross-carrier scheduling;
receive an indication of a UL-DL subframe configuration of a scheduled cell in the wireless TDD system that utilizes the cross-carrier scheduling, the UL-DL subframe configuration of the scheduled cell being different from the UL-DL subframe configuration of the scheduling cell;
identify a reference UL-DL subframe configuration based at least in part on the UL-DL subframe configurations of the scheduling cell and scheduled cell; and
receive, from the scheduling cell, a hybrid automatic repeat request (HARD) signal of the scheduled cell according to a subframe timing of the reference UL-DL subframe configuration;
wherein:
the reference UL-DL subframe configuration is equal to 0 if the UL-DL subframe configuration of the scheduling cell is equal to 6 and the UL-DL subframe configuration of the scheduled cell is equal to 0;
the reference UL-DL subframe configuration is equal to 1 if the UL-DL subframe configuration of the scheduling cell is equal to 0 or 6, and the UL-DL subframe configuration of the scheduled cell is equal to 1, 2, or 5;
the reference UL-DL subframe configuration is equal to 3 if the UL-DL subframe configuration of the scheduling cell is equal to 0 or 6, and the UL-DL subframe configuration of the scheduled cell is equal to 3;
the reference UL-DL subframe configuration is equal to 6 if the UL-DL subframe configuration of the scheduling cell is equal to 0 and the UL-DL subframe configuration of the scheduled cell is equal to 6; and
the reference UL-DL subframe configuration is equal to 4 if the UL-DL subframe configuration of the scheduling cell is equal to 6 and the UL-DL subframe configuration of the scheduled cell is equal to 4.

### Claim 17 (depends on 16)

The one or more non-transitory computer-readable media of claim 16, wherein:
the reference UL-DL subframe configuration is equal to 1 if the UL-DL subframe configuration of the scheduling cell is equal to 1 and the UL-DL subframe configuration of the scheduled cell is equal to 2, 4, or 5;
the reference UL-DL subframe configuration is equal to 2 if the UL-DL subframe configuration of the scheduling cell is equal to 2 and the UL-DL subframe configuration of the scheduled cell is equal to 5;
the reference UL-DL subframe configuration is equal to 3 if the UL-DL subframe configuration of the scheduling cell is equal to 3 and the UL-DL subframe configuration of the scheduled cell is equal to 4 or 5; and
the reference UL-DL subframe configuration is equal to 4 if the UL-DL subframe configuration of the scheduling cell is equal to 4 and the UL-DL subframe configuration of the scheduled cell is equal to 5.

### Claim 18 (depends on 16)

The one or more non-transitory computer-readable media of claim 16, wherein:
the reference UL-DL subframe configuration is equal to 6 if the UL-DL subframe configuration of the scheduling cell is equal to 1, 2, 3, or 4, and the UL-DL subframe configuration of the scheduled cell is equal to 6;
the reference UL-DL subframe configuration is equal to 0 if the UL-DL subframe configuration of the scheduling cell is equal to 3 or 4, and the UL-DL subframe configuration of the scheduled cell is equal to 0; and
the reference UL-DL subframe configuration is equal to 1 if the UL-DL subframe configuration of the scheduling cell is equal to 4 and the UL-DL subframe configuration of the scheduled cell is equal to 1.

### Claim 19 (depends on 16)

The one or more non-transitory computer-readable media of claim 16, wherein the indication of the UL-DL subframe configuration of the scheduling cell is received in a system information block of a signal of the scheduling cell.

### Claim 20 (depends on 16)

The one or more non-transitory computer-readable media of claim 16, wherein:
the reference UL-DL subframe configuration is equal to 3 if the UL-DL subframe configuration of the scheduling cell is equal to 2 and the UL-DL subframe configuration of the scheduled cell is equal to 3; and
the reference UL-DL subframe configuration is equal to 4 if the UL-DL subframe configuration of the scheduling cell is equal to 2 and the UL-DL subframe configuration of the scheduled cell is equal to 4.

### Claim 21 (depends on 16)

The one or more non-transitory computer-readable media of claim 16, wherein the scheduling cell is a primary service cell or a secondary serving cell; and
wherein the scheduled cell is a secondary serving cell.

### Claim 22 (depends on 16)

The one or more non-transitory computer-readable media of claim 16, wherein the instructions are further to receive an identification of the reference UL-DL subframe configuration via one or more radio resource control (RRC) signals.

### Claim 23 (depends on 16)

The one or more non-transitory computer-readable media of claim 16, wherein the instructions are further to identify the reference UL-DL subframe configuration via a table stored in a memory of the UE.

### Claim 24 (depends on 16)

The one or more non-transitory computer-readable media of claim 16, wherein at least one of the UL-DL subframe configuration of the scheduled cell, the UL-DL subframe configuration of the scheduling cell, and the reference UL-DL subframe configuration correspond to one of TDD UL-DL configurations 0-6 associated with 3rd Generation Partnership Project's (3GPP's) long-term evolution (LTE) advanced wireless communication standard; and
wherein the UE is a mobile phone, a netbook, a laptop, an electronic tablet, or a data system of a vehicle.

### Claim 25 (depends on 16)

The one or more non-transitory computer-readable media of claim 16, wherein the reference UL-DL subframe configuration is different from the UL-DL subframe configuration of either the scheduling cell or the scheduled cell.

### Claim 26 (depends on 16)

The one or more non-transitory computer-readable media of claim 16, wherein the HARQ signal of the scheduled cell is received in a downlink subframe of the scheduling cell; and
wherein the HARQ signal comprises a positive or negative acknowledgement signal.

### Claim 27

One or more non-transitory computer-readable media comprising instructions to cause an enhanced NodeB (eNB), upon execution of the instructions by one or more processors of the eNB, to:
determine respective uplink/downlink (UL-DL) subframe configurations of a scheduling cell and a scheduled cell in a wireless time-division duplex (TDD) system that utilizes cross-carrier scheduling, the UL-DL subframe configuration of the scheduled cell being different from the UL-DL subframe configuration of the scheduling cell;
determine a reference UL-DL subframe configuration based at least in part on the UL-DL subframe configurations of the scheduling cell and the scheduled cell;
transmit, to a user equipment (UE), an indication of the UL-DL subframe configuration of the scheduling cell and an indication of the UL-DL subframe configuration of the scheduled cell; and
transmit a hybrid automatic repeat request (HARQ) signal comprising a positive or negative acknowledgement signal of the scheduled cell in a downlink subframe of the scheduling cell according to the reference UL-DL subframe configuration;
wherein:
the reference UL-DL subframe configuration is equal to 1 if the UL-DL subframe configuration of the scheduling cell is equal to 1 and the UL-DL subframe configuration of the scheduled cell is equal to 2, 4, or 5;
the reference UL-DL subframe configuration is equal to 2 if the UL-DL subframe configuration of the scheduling cell is equal to 2 and the UL-DL subframe configuration of the scheduled cell is equal to 5;
the reference UL-DL subframe configuration is equal to 3 if the UL-DL subframe configuration of the scheduling cell is equal to 3 and the UL-DL subframe configuration of the scheduled cell is equal to 4 or 5;
the reference UL-DL subframe configuration is equal to 4 if the UL-DL subframe configuration of the scheduling cell is equal to 4 and the UL-DL subframe configuration of the scheduled cell is equal to 5;
the reference UL-DL subframe configuration is equal to 6 if the UL-DL subframe configuration of the scheduling cell is equal to 1, 2, 3, or 4, and the UL-DL subframe configuration of the scheduled cell is equal to 6.

### Claim 28 (depends on 27)

The one or more non-transitory computer-readable media of claim 27, wherein the instructions, when executed, are further to cause the eNB to transmit, to the UE, an indication of the reference UL-DL subframe configuration.

### Claim 29 (depends on 27)

The one or more non-transitory computer-readable media of claim 27, wherein the scheduling cell is a primary service cell or a secondary serving cell; and
wherein the scheduled cell is a secondary serving cell.

### Claim 30 (depends on 27)

The one or more non-transitory computer-readable media of claim 27, wherein at least one of the UL-DL subframe configuration of the scheduled cell, the UL-DL subframe configuration of the scheduling cell, and the reference UL-DL subframe configuration are one of TDD UL-DL configurations 0-6 associated with 3rd Generation Partnership Project's (3GPP's) long-term evolution (LTE) advanced wireless communication standard.

### Claim 31 (depends on 27)

The one or more non-transitory computer-readable media of claim 27, wherein:
the reference UL-DL subframe configuration is equal to 0 if the UL-DL subframe configuration of the scheduling cell is equal to 6 and the UL-DL subframe configuration of the scheduled cell is equal to 0;
the reference UL-DL subframe configuration is equal to 1 if the UL-DL subframe configuration of the scheduling cell is equal to 0 or 6, and the UL-DL subframe configuration of the scheduled cell is equal to 1, 2, or 5;
the reference UL-DL subframe configuration is equal to 3 if the UL-DL subframe configuration of the scheduling cell is equal to 0 or 6, and the UL-DL subframe configuration of the scheduled cell is equal to 3;
the reference UL-DL subframe configuration is equal to 6 if the UL-DL subframe configuration of the scheduling cell is equal to 0 and the UL-DL subframe configuration of the scheduled cell is equal to 6; and
the reference UL-DL subframe configuration is equal to 4 if the UL-DL subframe configuration of the scheduling cell is equal to 6 and the UL-DL subframe configuration of the scheduled cell is equal to 4;
the reference UL-DL subframe configuration is equal to 0 if the UL-DL subframe configuration of the scheduling cell is equal to 3 or 4, and the UL-DL subframe configuration of the scheduled cell is equal to 0;
the reference UL-DL subframe configuration is equal to 1 if the UL-DL subframe configuration of the scheduling cell is equal to 4 and the UL-DL subframe configuration of the scheduled cell is equal to 1;
the reference UL-DL subframe configuration is equal to 3 if the UL-DL subframe configuration of the scheduling cell is equal to 2 and the UL-DL subframe configuration of the scheduled cell is equal to 3; and
the reference UL-DL subframe configuration is equal to 4 if the UL-DL subframe configuration of the scheduling cell is equal to 2 and the UL-DL subframe configuration of the scheduled cell is equal to 4.