Enhanced physical downlink control channel transmission method and apparatus

An enhanced physical downlink control channel (E-PDCCH) transmission method comprising:

• in a physical resource block set, separately ordering, by a base station, first resource groups in each physical resource block (PRB) pair, wherein the first resource groups are resource element groups (REGs), and the physical resource block set comprises at least one of the physical resource block pairs;
• numbering, by the base station, second resource groups according to a correspondence between the first resource groups and the second resource groups in the physical resource block set, wherein the second resource groups are control channel element (eCCE) groups or control channel candidates;
• determining, by the base station, numbers of the second resource groups for transmitting an E-PDCCH;
• and
• mapping, by the base station, according to the determined numbers, the E-PDCCH to corresponding first resource groups for transmission;
• transmitting, by the base station the E-PDCCH to a terminal device,
• wherein each of the at least one physical resource block pair comprises N third resource groups, wherein N is a positive integer, and each of the N third resource groups comprises M first resource groups;
• wherein in the physical resource block set, a number set of first resource groups comprised in each third resource group in a physical resource block pair is the same as a number set of first resource groups comprised in a third resource group in each of other physical resource block pairs;
• wherein in each of the physical resource block pairs, a sequence of numbers of the third resource groups is the same as a sequence of maximum numbers or minimum numbers of the first resource groups in the third resource groups;
• and
• numbering the second resource groups according to the correspondence between the first resource groups and the second resource groups in the physical resource block set comprises numbering the second resource groups of a first type corresponding to third resource groups having a same number sequentially in an ascending or descending order of the numbers of the third resource groups,
• wherein each of the third resource groups corresponds to one of second resource groups of the first type, and a correspondence between a sequence of numbers of the second resource groups of the first type and a sequence of numbers of PRB pairs in which the second resource groups of the first type are located, exists in the second resource groups of the first type corresponding to the third resource groups having the same number.