| CPC H04W 72/23 (2023.01) [H04L 5/14 (2013.01)] | 16 Claims |

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1. A method, comprising:
receiving, by a first apparatus from a network device, an uplink-downlink time division duplex (TDD) configuration, wherein the uplink-downlink TDD configuration indicates a quantity of TDD patterns and a TDD pattern periodicity; and
sending, by the first apparatus to a second apparatus, indication information based on the uplink-downlink TDD configuration, wherein the indication information is a bit sequence with 12 bits, the bit sequence comprises a first bit sequence and a second bit sequence, wherein a first part of bits in the first bit sequence indicates the quantity of the TDD patterns is 1 or 2, wherein a second part of bits in the first bit sequence indicates an index corresponding to the TDD pattern periodicity of a TDD pattern or an index corresponding to a periodicity combination of two TDD patterns, the second bit sequence indicates uplink (UL) transmission duration in the TDD pattern periodicity of each of the TDD patterns, and wherein the first part of bits in the first bit sequence is 1 bit, the second part of bits in the first bit sequence is 4 bits, and the second bit sequence is 7 bits.
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