Method, system and device for transmitting and detecting control signaling in backhaul link

A method for detecting control signaling in a backhaul link or a relay system, the method comprising:

• obtaining, by a relay node, location information of one or more Relay Physical Downlink Control Channel, R-PDCCH, resource sub-regions, wherein the R-PDCCH resource sub-regions are R-PDCC,H resource sub-regions formed by dividing a resource region occupied by an R-PDCCH;
• and
• for each R-PDCCH resource sub-region among the one or more R-PDCCH resource sub-regions, determining control signaling corresponding to the R-PDCCH resource sub-region according to a preset correspondence relationship between the R-PDCCH resource sub-region and the control signaling and detecting the control signaling in the R-PDCCH resource sub-region according to the location information of the R-PDCCH resource sub-region,
• wherein the one or more R-PDCCH resource sub-regions comprise two R-PDCCH resource sub-regions, wherein a first R-PDCCH resource sub-region among the two R-PDCCH resource sub-regions is located preceding a second -PDCCH resource sub-region in the time domain:
• and
• wherein the preset correspondence relationship comprises a correspondence relationship between a first category of control signaling and the lust R-PDCCH resource sub-region and a correspondence relationship between a second category of control signaling and the second R-PDCCH resource sub-regions wherein the first category of control signaling has a higher demodulation delay requirement than that of the second category of control signaling.

A relay node comprising:

• a configuration information obtaining unit configured to obtain location information of one or more Relay Physical Downlink Control Channel, R-PDCCH, resource sub-regions, wherein the R-PDCCH resource sub-regions are R-PDCCH resource sub-regions formed by dividing a resource region occupied by an R-PDCCH;
• and
• signaling detecting unit configured, for each R-PDCCH resource sub-region among the one or more R-PDCCH resource sub-regions, to determine control signaling corresponding to the R-PDCCH resource sub-region according to a preset correspondence relationship between the R-PDCCH resource sub-region and the control signaling and to detect the control signaling in the R-PDCCH resource sub-region according to the location information of the R-PDCCH resource sub-regions,
• wherein one or more resource sub-regions comprise two R-PDCCH resource sub-regions, wherein a first R-PDCCH resource sub-region among the two R-PDCCH resource sub-regions is located preceding a second R-PDCCH resource sub-regions in the time domain:
• and
• wherein the preset correspondence relationship comprises a correspondence relationship between a first category of control signaling and the first R-PDCCH resource sub-region and a correspondence relationship between a second category of control signaling second R-PDCCH resource sub-region, wherein the first category of control signaling a higher demodulation delay requirement than the second category control signaling.