Radio network node, user equipment and methods therein

摘要

Embodiments herein disclose a method in a user equipment (10) for communicating with a radio network node (12, 12′) in a radio communications network, which user equipment (10) is served by the radio network node (12, 12′). The user equipment receives first information from the radio network node (12, 12′) over a control channel, which first information comprises a pointer to which scheduling assignment element for the user equipment (10) to use. The scheduling assignment element is comprised in a set of scheduling assignments stored at the user equipment (10). The user equipment communicates data with the radio network node (12, 12′) using second information in the scheduling assignment element indicated by the pointer.

主权项

1. A method in a user equipment for communicating with a radio network node in a radio communications network, which user equipment is served by the radio network node, wherein the method comprises: receiving first information from the radio network node over a control channel, which first information comprises a pointer to which scheduling assignment element for the user equipment to use, which scheduling assignment element is comprised in a set of scheduling assignments stored at the user equipment, the first information received in a compact DCI format comprising a common DCI format that has been reduced to use a portion of bits in the common DCI format for the pointer to the scheduling assignment element, the compact DCI format comprising a field of reduced Modulation and Coding Scheme with first modulation and coding scheme information; communicating data with the radio network node using second information in the scheduling assignment element indicated by the pointer, the second information comprising second modulation and coding scheme information; and performing blind decoding over control channel elements to detect the first information, wherein the first information comprises a cyclic redundancy check sum scrambled with a special radio network temporary identifier and the performing is performed over a common search space control channel elements configured for user equipments served by the radio network node, and wherein the cyclic redundancy check sum scrambled with the special radio network temporary identifier indicates that the first information comprises the pointer, and wherein one or more blind decodings have been reduced within the compact DCI format to accommodate the pointer to the scheduling assignment element such that a total number of the one or more blind decodings remains the same as the common DCI format.