US20260222161
2026-07-30
Electricity
H04L5/0092
The patent application details a method for configuring uplink and downlink transmissions in a full duplex wireless communication system. The system involves a Next Generation Node B (gNB) device that configures frequency resources for uplink and downlink within a serving cell or bandwidth part. This configuration is communicated to user equipment (UE) along with scheduling information for signal transmission. The gNB can identify uplink transmissions from the UE or provide downlink transmissions based on these configurations.
Wireless communication technologies, particularly those defined by the 3rd Generation Partnership Program (3GPP), are evolving to support more efficient communication methods. Time Division Duplex (TDD) systems, which split time resources between uplink and downlink, face challenges like reduced coverage and increased latency. Full duplex communication, allowing simultaneous transmission and reception, is being explored to address these challenges. Specifically, Non-Overlapping Sub-Band Full Duplex (SBFD) at the gNB is under consideration for future standards.
In SBFD operations, a gNB can transmit downlink signals and receive uplink signals simultaneously using non-overlapping frequency resources. A UE aware of SBFD support can identify both downlink and uplink resources in a symbol. These resources can be determined semi-statically or dynamically, allowing flexible configurations. The method enables efficient full duplex operations by determining resources for signal channels based on SBFD and non-SBFD symbol configurations.
Symbols in a serving cell can be designated for either downlink or uplink channels or both in SBFD operations. Frequency resources within a symbol may be divided into downlink, uplink, or guard resources within non-overlapping sub-bands. The configuration of these sub-bands, including time and frequency information, can be provided to a UE via semi-static or dynamic signaling. This allows dynamic switching between legacy and SBFD symbols, optimizing resource use.
Dynamic sub-band configurations involve a new bit field in downlink assignments or uplink grants to indicate symbol type changes. This bit field may include one or more bits to specify whether a symbol is SBFD or non-SBFD. The field can apply to all symbols in a slot or specific transmission occasions. Alternatively, existing frequency domain resource allocation fields can implicitly indicate symbol type switches. These mechanisms enable flexible and efficient resource allocation in full duplex systems.