# US 11,122,562 B2 · System and method for transmission time intervals

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- Number: US 11,122,562 B2
- Document ID: US11122562B2
- Status: Granted
- Kind: B2
- Application number: 16/000,583
- Filed: 2018-06-05
- Published: 2018-10-11
- Granted: 2021-09-14
- Earliest claimed: 2015-02-24
- Assignees: Huawei Technologies Co., Ltd.
- Applicants: Huawei Technologies Co., Ltd.
- Inventors: Kelvin Kar Kin Au; Liqing Zhang; Jianglei Ma; Keyvan Zarifi
- Web page: https://patentgrep.com/patent/US11122562B2

## CPC

- H04W 72/0446: Resources in time domain, e.g. slots or frames
- H04L 1/1864: {ARQ related signaling (H04L1/1607 takes precedence)}
- H04L 5/14: Two-way operation using the same type of signal, i.e. duplex
- H04W 48/00: Access restriction (access security to prevent unauthorised access H04W12/08); Network selection; Access point selection
- 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 28/06: Optimizing {the usage of the radio link}, e.g. header compression, information sizing {, discarding information (system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365)}
- H04W 72/12: Wireless traffic scheduling
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

In one embodiment, a method for adaptive transmission time intervals (TTIs) includes transmitting, by a communications controller to a user equipment (UE), a segment of a first TDD TTI configuration of a first TDD interval and a second TDD TTI configuration of the first TDD interval, where the first TDD TTI configuration has a first pattern, where the second TDD TTI configuration has a second pattern, where the first pattern is different than the second pattern, where the first TDD TTI configuration has a first uplink TTI segment and a first downlink TTI segment. The method also includes transmitting a first plurality of data on a first TTI in the first downlink TTI segment of the first TDD TTI configurations of the first TDD interval and receiving a second plurality of data on the first uplink segment of the first TDD TTI configuration of the first TDD interval.

## Claims

### Claim 1

A method comprising:
receiving, by an apparatus from a base station (BS), a first higher layer signaling indicating a first time division duplexing (TDD) frame structure configuration; and
receiving, by the apparatus from the BS, a second higher layer signaling indicating a first feedback slot configuration information,
the first TDD frame structure configuration comprising at least one of a first uplink pattern, a first downlink pattern, or a first uplink and downlink pattern, the first TDD frame structure configuration further comprising a first time unit size of the at least one of the first uplink pattern, the first downlink pattern, or the first uplink and downlink pattern, and the first feedback slot configuration information comprising a hybrid automatic repeat request (HARQ) feedback delay between a downlink data transmission and a HARQ feedback corresponding to the downlink data transmission,
the first time unit size explicitly indicated in the first higher layer signaling,
a value of the HARQ feedback delay between the downlink data transmission and the HARQ feedback explicitly indicated in the second higher layer signaling,
the value of the HARQ feedback delay between the downlink data transmission and the HARQ feedback being in a number of one or more transmission time intervals (TTls) associated with the first time unit size, and
the downlink data transmission being directly from the BS to the apparatus.

### Claim 2 (depends on 1)

The method of claim 1, wherein the first TDD frame structure configuration is one of at least two TDD frame structure configurations, and wherein the at least two TDD frame structure configurations comprise a second TDD frame structure configuration, the second TDD frame structure configuration comprising at least one of a second uplink pattern or a second downlink pattern, the second TDD frame structure configuration further comprising a second time unit size of the second uplink pattern or the second downlink pattern.

### Claim 3 (depends on 2)

The method of claim 2, wherein the first time unit size is different from the second time unit size.

### Claim 4 (depends on 1)

The method of claim 1, wherein the first TDD frame structure configuration further comprises a second time unit size of the at least one of the first uplink pattern or the first downlink pattern, the first feedback slot configuration information further comprises configuration of a feedback slot associated with the first time unit size and the second time unit size, and the configuration of the feedback slot is based on a traffic type and a latency requirement.

### Claim 5

An apparatus comprising:
a transceiver;
a non-transitory memory storage comprising instructions; and
one or more processors in communication with the non-transitory memory storage, wherein the one or more processors execute the instructions to:
cause the transceiver to receive, from a base station (BS), a first higher layer signaling indicating a first time division duplexing (TDD) frame structure configuration; and
cause the transceiver to receive, from the BS, a second higher layer signaling indicating a first feedback slot configuration information,
wherein the first TDD frame structure configuration comprises at least one of a first uplink pattern, a first downlink pattern, or a first uplink and downlink pattern, the first TDD frame structure configuration further comprising a first time unit size of the at least one of the first uplink pattern, the first downlink pattern, or the first uplink and downlink pattern, and the first feedback slot configuration information comprises a hybrid automatic repeat request (HARQ) feedback delay between a downlink data transmission and a HARQ feedback corresponding to the downlink data transmission,
the first time unit size explicitly indicated in the first higher layer signaling,
a value of the HARQ feedback delay between the downlink data transmission and the HARQ feedback explicitly indicated in the second higher layer signaling,
the value of the HARQ feedback delay between the downlink data transmission and the HARQ feedback being in a number of one or more transmission time intervals (TTIs) associated with the first time unit size, and
the downlink data transmission being directly from the BS to the apparatus.

### Claim 6 (depends on 5)

The apparatus of claim 5, wherein the first TDD frame structure configuration is one of at least two TDD frame structure configurations, and wherein the at least two TDD frame structure configurations comprise a second TDD frame structure configuration, the second TDD frame structure configuration comprising at least one of a second uplink pattern or a second downlink pattern, the second TDD frame structure configuration further comprising a second time unit size of the second uplink pattern or the second downlink pattern.

### Claim 7 (depends on 6)

The apparatus of claim 6, wherein the first time unit size is different from the second time unit size.

### Claim 8

A method comprising:
sending, by a base station (BS) to a user equipment (UE), a first higher layer signaling indicating a first time division duplexing (TDD) frame structure configuration; and
sending, by the BS to the UE, a second higher layer signaling indicating a first feedback slot configuration information,
the first TDD frame structure configuration comprising at least one of a first uplink pattern, a first downlink pattern, or a first uplink and downlink pattern, the first TDD frame structure configuration further comprising a first time unit size of the at least one of the first uplink pattern, the first downlink pattern, or the first uplink and downlink pattern, and the first feedback slot configuration information comprising a hybrid automatic repeat request (HARQ) feedback delay between a downlink data transmission and a HARQ feedback corresponding to the downlink data transmission,
the first time unit size explicitly indicated in the first higher layer signaling,
a value of the HARQ feedback delay between the downlink data transmission and the HARQ feedback explicitly indicated in the second higher layer signaling,
the value of the HARQ feedback delay between the downlink data transmission and the HARQ feedback being in a number of one or more transmission time intervals (TTls) associated with the first time unit size, and
the downlink data transmission being directly from the BS to the UE.

### Claim 9 (depends on 8)

The method of claim 8, wherein the first TDD frame structure configuration is one of at least two TDD frame structure configurations, and wherein the at least two TDD frame structure configurations comprise a second TDD frame structure configuration, the second TDD frame structure configuration comprising at least one of a second uplink pattern or a second downlink pattern, the second TDD frame structure configuration further comprising a second time unit size of the second uplink pattern or the second downlink pattern.

### Claim 10 (depends on 9)

The method of claim 9, wherein the first time unit size is different from the second time unit size.

### Claim 11

A network communications device comprising:
a transceiver;
a non-transitory memory storage comprising instructions; and
one or more processors in communication with the non-transitory memory storage, wherein the one or more processors execute the instructions to:
cause the transceiver to send, to a user equipment (UE), a first higher layer signaling indicating a first time division duplexing (TDD) frame structure configuration; and
cause the transceiver to send, to the UE, a second higher layer signaling indicating a first feedback slot configuration information,
wherein the first TDD frame structure configuration comprises at least one of a first uplink pattern, a first downlink pattern, or a first uplink and downlink pattern, the first TDD frame structure configuration further comprising a first time unit size of the at least one of the first uplink pattern, the first downlink pattern, or the first uplink and downlink pattern, and the first feedback slot configuration information comprises a hybrid automatic repeat request (HARQ) feedback delay between a downlink data transmission and a HARQ feedback corresponding to the downlink data transmission,
the first time unit size explicitly indicated in the first higher layer signaling,
a value of the HARQ feedback delay between the downlink data transmission and the HARQ feedback explicitly indicated in the second higher layer signaling,
the value of the HARQ feedback delay between the downlink data transmission and the HARQ feedback being in a number of one or more transmission time intervals (TTIs) associated with the first time unit size, and
the downlink data transmission being directly from the BS to the UE.

### Claim 12 (depends on 11)

The network communications device of claim 11, wherein the first TDD frame structure configuration is one of at least two TDD frame structure configurations, and wherein the at least two TDD frame structure configurations comprise a second TDD frame structure configuration, the second TDD frame structure configuration comprising at least one of a second uplink pattern or a second downlink pattern, the second TDD frame structure configuration further comprising a second time unit size of the second uplink pattern or the second downlink pattern.

### Claim 13 (depends on 12)

The network communications device of claim 12, wherein the first time unit size is different from the second time unit size.

### Claim 14

A network system, comprising:
a backhaul network entity in communication with a network communications device; and
the network communications device, the network communications device configured to:
send, to a user equipment (UE), a first higher layer signaling indicating a first time division duplexing (TDD) frame structure configuration; and
send, to the UE, a second higher layer signaling indicating a first feedback slot configuration information,
wherein the first TDD frame structure configuration comprises at least one of a first uplink pattern, a first downlink pattern, or a first uplink and downlink pattern, the first TDD frame structure configuration further comprising a first time unit size of the at least one of the first uplink pattern, the first downlink pattern, or the first uplink and downlink pattern, and the first feedback slot configuration information comprises a hybrid automatic repeat request (HARQ) feedback delay between a downlink data transmission and a HARQ feedback corresponding to the downlink data transmission,
the first time unit size explicitly indicated in the first higher layer signaling,
a value of the HARQ feedback delay between the downlink data transmission and the HARQ feedback explicitly indicated in the second higher layer signaling,
the value of the HARQ feedback delay between the downlink data transmission and the HARQ feedback being in a number of one or more transmission time intervals (TTIs) associated with the first time unit size, and
the downlink data transmission being directly from the BS to the UE.

### Claim 15 (depends on 14)

The network system of claim 14 wherein the first TDD frame structure configuration is one of at least two TDD frame structure configurations, and wherein the at least two TDD frame structure configurations comprise a second TDD frame structure configuration, the second TDD frame structure configuration comprising at least one of a second uplink pattern or a second downlink pattern, the second TDD frame structure configuration further comprising a second time unit size of the second uplink pattern or the second downlink pattern.

### Claim 16 (depends on 15)

The network system of claim 15, wherein the first time unit size is different from the second time unit size.