System and method for supporting inter-band carrier aggregation with different ul / dl TDD configurations
By employing a supplementary TDD configuration for HARQ requests on secondary component carriers with differing uplink and downlink configurations, the patent addresses inefficiencies in data transmission and retransmission across multiple frequency bands, improving communication efficiency.
Patent Information
- Authority / Receiving Office
- HK · HK
- Patent Type
- Applications
- Current Assignee / Owner
- BLACKBERRY LTD
- Filing Date
- 2023-01-20
- Publication Date
- 2026-07-17
AI Technical Summary
Existing wireless communication systems face challenges in efficiently managing data transmission and Hybrid Automatic Repeat Request (HARQ) processes across different frequency bands using Time Division Duplex (TDD) configurations, particularly when multiple component carriers are involved.
Implementing a supplementary TDD configuration for Hybrid Automatic Repeat Request (HARQ) requests on a secondary component carrier, where the uplink and downlink configurations can differ, enhancing data transmission and retransmission efficiency.
Improves data transmission and retransmission efficiency by optimizing HARQ processes across multiple frequency bands, thereby enhancing overall communication performance.
Smart Images
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Abstract
Description
Abstract In some implementations, the wireless communication method between a wireless communication network and a wireless user equipment includes receiving data on a primary component carrier in a first frequency band using a primary Time Division Duplex (TDD) configuration. A secondary TDD configuration is used to receive data on a secondary component carrier in a second frequency band different from the first frequency band. A supplementary TDD configuration is used to transmit Hybrid Automatic Repeat Request (HARQ) requests for the data received on the secondary component carrier. Transmission or retransmission on the secondary component carrier also uses the supplementary TDD configuration. The supplementary TDD configuration differs from the secondary TDD configuration. Furthermore, the uplink supplementary configuration may differ from the downlink supplementary configuration.
Claims
1. A method of wireless communications between a wireless communications network and wireless user equipment, comprising: receiving, using a primary time division duplex, TDD, configuration, data on a primary component carrier in a first frequency band; receiving, using a secondary TDD configuration, data on a secondary component carrier in a secondary frequency band different from the first frequency band; and transmitting a Hybrid Automatic Repeat Request, HARQ, for data received on the second component carrier using a supplemental TDD configuration, wherein the supplemental TDD configuration is different from the secondary TDD configuration, wherein the primary TDD configuration comprises a primary downlink TDD configuration including downlink subframes, the secondary TDD configuration comprises a secondary downlink TDD configuration including downlink subframes, the supplemental TDD configuration comprises a supplemental downlink TDD configuration, and the supplemental downlink TDD configuration specifies a set of downlink subframes including downlink subframes specified in the primary TDD configuration and the secondary TDD configuration.
2. The method of claim 1, wherein the HARQ for the data received on the second component carrier is transmitted in the primary component carrier.
3. The method of claim 1 or 2, wherein the step of transmitting a Hybrid Automatic Repeat Request, HARQ, for data received on the second component carrier using the supplemental TDD configuration includes transmitting a HARQ acknowledgment / negative acknowledgement, ACK / NACK, to signal successful receipt of said data received on the second component carrier and to request retransmissions of said data that was not received successfully.
4. The method of any of claims 1 to 3, wherein the supplemental TDD configuration is one of a set of seven standard TDD Uplink-Downlink configurations used in the third generation partnership project, 3GPP, Long-Term Evolution, LTE, wireless communication standard.
5. The method of claim 1, further comprising receiving data on tertiary component carrier using a third TDD configuration in a third frequency band different from the first frequency band and the second frequency band, wherein the supplemental TDD configuration comprises an aggregations of the primary TDD configuration and third TDD configuration.
6. The method of claim 1, further comprising in response to not receiving a DL PDCCH to schedule grants, executing at least one of Cross Transmission Time Interval (TTI) scheduling, bundle scheduling, or temporarily disable cross-carrier scheduling.
7. User Equipment for wireless communications with a wireless communications network, comprising one or more processors configured to perform the steps of the method of any of claims 1 to 6.
8. A computer-readable medium storing instructions which, when executed, cause a computing device to perform the method according to any of claims 1 to 6.
9. A method of wireless communications between a wireless communications network and wireless user equipment, comprising: transmitting, using a primary time division duplex, TDD, configuration, data on a primary component carrier in a first frequency band; transmitting, using a secondary TDD configuration, data on a secondary component carrier in a secondary frequency band different from the first frequency band; and receiving a Hybrid Automatic Repeat Request, HARQ, for data transmitted on the second component carrier using a supplemental TDD configuration, wherein the supplemental TDD configuration is different from the secondary TDD configuration, wherein the primary TDD configuration comprises a primary downlink TDD configuration including downlink subframes, the secondary TDD configuration comprises a secondary downlink TDD configuration including downlink subframes, the supplemental TDD configuration comprises a supplemental downlink TDD configuration, and the supplemental downlink TDD configuration specifies a set of downlink subframes including downlink subframes specified in the primary TDD configuration and the secondary TDD configuration.
10. The method of claim 9, wherein the HARQ for the data transmitted on the second component carrier is received in the primary component carrier.
11. The method of claim 9 or 10, wherein the step of receiving the Hybrid Automatic Repeat Request, HARQ, for data transmitted on the second component carrier using the supplemental TDD configuration includes receiving a HARQ acknowledgment / negative acknowledgement, ACK / NACK, to signal successful receipt of said data transmitted on the second component carrier and to request retransmissions of said data transmitted on the second component carrier that was not received successfully.
12. The method of any of claims 9 to 11, wherein the supplemental TDD configuration is one of a set of seven standard TDD Uplink-Downlink configurations used in the third generation partnership project, 3GPP, Long-Term Evolution, LTE, wireless communication standard.
13. A base station for wireless communication with a wireless user equipment, comprising one or more processors configured to perform the steps of the method of any of claims 8 to 11.
14. A wireless communications network for wireless communication with a wireless user equipment, comprising one or more processors configured to perform the steps of the method of any of claims 8 to 11.
15. A computer-readable medium storing instructions which, when executed, cause a computing device to perform the method according to any of claims 8 to 11.