Method and apparatus for extending coverage in communication system
摘要
說明書
The terminal may follow a slot format indicated by RRC signaling and/or a DCI format 2_0. In this case, the terminal may not be able to transmit a PUCCH in some symbols. Some symbols may be excluded from the mapping of the code block(s) of UCI. The terminal may perform a rate matching operation for mapping the code block(s) of UCI only to valid symbols. The terminal may first reflect RRC signaling and/or a DCI indicating the slot format, and then map the code block(s) of UCI.
According to the proposed method, only some symbols of the PUCCH may be transmitted, but a transmit power may be determined based on the assumption that all symbols constituting the PUCCH are transmitted.
3.1.2 Repetitive Transmission Method
When a terminal is located in an edge region of a cell, a base station may allocate a maximum power to a PUCCH, and may apply a minimum code rate to the PUCCH. In order to lower an error rate of the PUCCH, the base station may indicate to the terminal to repeatedly transmit the PUCCH.
The repeated transmission of the PUCCH may be indicated to the terminal by RRC signaling or by a combination of RRC signaling and a DCI. Accordingly, the terminal may repeatedly transmit the PUCCH. The PUCCH may be repeatedly transmitted using time resources and frequency resources in a slot or a sub-slot. The repeated transmission of the PUCCH may mean transmitting the PUCCH using the same PUCCH resource in consecutive slots or consecutive sub-slots. The number of PUCCH repetitions may be indicated to the terminal by RRC signaling or by a combination of RRC signaling and a DCI. For convenience of description, when the PUCCH is repeatedly transmitted, all PUCCHs may be referred to as a PUCCH occasion, and each PUCCH may be referred to as a PUCCH instance.
