Transport Block Size Determination Method, Base Station and Terminal

A method for determining a transport block size, comprising:

• a base station performing scheduling according to channel state information reported by a terminal, determining a combination of I′TBS and N′PRB, which is {I′TBS, N′PRB};
• the base station selecting a mapping way, determining a transport block size according to the {I′TBS, N′PRB}, wherein, the mapping way comprises the following rules:
• a first rule:
• using a high-layer TBS to obtain a low-layer TBS according to the {I′TBS, N′PRB}.

A terminal, comprising:

• a first determination unit, configured to receive downlink control signaling transmitted by a base station, and obtain a combination of I′TBS and N′PRB, which is {I′TBS, N′PRB}, according to the downlink control signaling;
• a second determination unit, configured to select a mapping way, determine a transport block size (TBS) according to the {I′TBS, N′PRB}, wherein, the mapping way comprises the following rules:
• a first rule:
• using a high-layer TBS to obtain a low-layer TBS according to the {I′TBS, N′PRB}.

The terminal of claim 4044, wherein, the second determination unit being configured to select a mapping way according to the {I′TBS, N′PRB} comprises:

• for C1≦N′PRB≦C2 and/or D1≦I′TBS≦D2, selecting the first rule;
• for C3≦N′PRB≦C4 and/or D3≦I′TBS≦D4, selecting the third rule, wherein, the Ci and Di satisfy Ci≧1;
• Di≧1, i=1, 2, 3, 4, or
• wherein, the second determination unit being configured to select the mapping way according to the {I′TBS, N′PRB} comprises:
• for C1≦N′PRB≦C2 and/or D1≦I′TBS≦D2, selecting the first rule;
• for C3≦N′PRB≦C4 and/or D3≦I′TBS≦D4, selecting a second rule, wherein, the second rule is:
• obtaining a TBS according to the {I′TBS, N′PRB} and a mapping relationship table pre-created, and the Ci and Di satisfy Ci≧1;
• Di≧1, i=1, 2, 3, 4, or
• wherein, the second determination unit being configured to select the mapping way according to the {I′TBS, N′PRB} comprises:
• for C1≦N′PRB≦C2 and/or D1≦I′TBS≦D2, selecting the first rule;
• for C5≦N′PRB≦C6 and/or D5≦I′TBS≦D6, selecting the third rule;
• for C7≦N′PRB≦C8 and/or D7≦I′TBS≦D8, selecting the second rule, wherein, the Ci and Di satisfy Ci≧1;
• Di≧1, i=1, 2, 3, 4, 5, 6, 7, 8, or
• wherein, the second determination unit being configured to select the mapping way according to the {I′TBS, N′PRB} comprises:
• for C1≦N′PRB≦C2 and/or D1≦I′TBS≦D2, selecting the third rule;
• for C3≦N′PRB≦C4 and/or D3≦I′TBS≦D4, selecting the second rule, wherein, the Ci and Di satisfy Ci≧1;
• Di≧1, i=1, 2, 3, 4.

The terminal of claim 4044, wherein, the second determination unit being configured to select the mapping way according to the {I′TBS, N′PRB} comprises:

• when there is no CRS transmitted in a sub-frame, and a number of resource elements occupied by DMRSs is 12:
• for C1≦N′PRB≦C2 and/or D1≦I′TBS≦D2, selecting the first rule;
• for C3≦N′PRB≦C4 and/or D3≦I′TBS≦D4, selecting the third rule;
• or,
• for C1≦N′PRB≦C2 and/or D1≦I′TBS≦D2, selecting the first rule;
• for C3≦N′PRB≦C4 and/or D3≦I′TBS≦D4, selecting the second rule;
• or,
• for C1≦N′PRB≦C2 and/or D1≦I′TBS≦D2, selecting the first rule;
• for C5≦N′PRB≦C6 and/or D5≦I′TBS≦D6, selecting the third rule;
• for C7≦N′PRB≦C8 and/or D7≦I′TBS≦D8, selecting the second rule;
• wherein, the Ci and Di satisfy Ci≧1;
• Di≧1, i=1, 2, 3, 4, 5, 6, 7, 8.

A base station, comprising:

• a third determination unit, configured to perform scheduling according to channel state information reported by a terminal, determine a combination of I′TBS and N′PRB, which is {I′TBS, N′PRB};
• a fourth determination unit, configured to select a mapping way, determine a transport block size (TBS) according to the {I′TBS, N′PRB}, wherein, the mapping way at-least comprises the following rules:
• a first rule:
• using a high-layer TBS to obtain a low-layer TBS according to the {I′TBS, N′PRB}.