Referring to FIG. 3E, the network-side device is a gNB in 5G NR, the terminal is UE in 5G NR, the cached data acquired by the terminal is fifth data cached in a PDCP layer of the UE, a PUCCH resource used to transmit an SR for the fifth data is a long-duration PUCCH resource or a short-duration PUCCH resource, a second parameter of the PUCCH resource is a PUCCH resource type, a bit number of bits of the SR and bearer information, information of the second parameter specifically includes long-duration PUCCH (2 bits, 00), long-duration PUCCH (2 bits, 01), long-duration PUCCH (2 bits, 10), long-duration PUCCH (2 bits, 11) and short-duration PUCCH (1 bits, 0/1), a first parameter of the fifth data is a TTI duration, information of the first parameter specifically includes 0.25 ms low level, 0.25 ms high level, 0.5 ms low level, 0.5 ms high level and 1 ms, and a mapping relationship, pre-configured by the UE through a high layer of a protocol stack, between information of a first parameter and information of a second parameter is shown in Table 5.
TABLE 5
Bit number of bits of SR and
PUCCH resource type
bearer information
TTI duration
Long-duration PUCCH
(2 bits, 00)
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