Method and apparatus for transmitting group downlink control information

An apparatus for transmitting group downlink control information (DCI), comprising:

• a transmitting module configured to transmit group DCI to a user side, wherein the group DCI comprises N bit blocks, and each bit block carries indication information comprising at least one of:
• an identifier of a user to be fed back (UE-ID), an identifier of a Hybrid Automatic Repeat reQuest (HARQ) process (HARQ-ID) of the user to be fed back, and a bitmap mapping of K HARQ processes of one user;
• and N is a positive integer greater than 0;
• and the indication information carried in each bit block of the group DCI is configured to indicate feedback information of the corresponding HARQ process;
• wherein each bit block comprises a bitmap mapping of M processes of one user, wherein each process corresponds to 1 bit in the bitmap mapping;
• wherein the transmitting module is further configured to:
• set bit values of the bitmap mapping in the bit blocks of the group DCI;
• wherein setting bit values of the bitmap mapping in the bit blocks of the group DCI comprises:
• selecting P bit blocks for setting a receiving state value corresponding to the HARQ process of the user to be fed back, and defining the P bit blocks as valid bit blocks;
• defining, in the case that P<N, bit blocks except the P bit blocks among the N bit blocks as invalid bit blocks, wherein values of the invalid bit blocks are set by at least one of:
• setting each invalid bit block to the same value as at least one valid bit block among the P bit blocks;
• or
• setting values of all invalid bit blocks to 0 or 1 or other preset values.

A method for transmitting group downlink control information (DCI), comprising:

• transmitting group Downlink Control Information (DCI) to a user side, wherein the group DCI comprises N bit blocks, and each bit block carries indication information comprising at least one of:
• an identifier of a user to be fed back (UE-ID), an identifier of a Hybrid Automatic Repeat reQuest (HARQ) process (HARQ-ID) of the user to be fed back, and a bitmap mapping of K HARQ processes of one user;
• where N is a positive integer greater than 0;
• and the indication information carried in each bit block of the group DCI is configured to indicate feedback information of an HARQ process corresponding to the indication information;
• wherein each bit block comprises a bitmap mapping of M processes of one user, wherein each process corresponds to 1 bit in the bitmap mapping;
• wherein the method further comprises:
• setting bit values of the bitmap mapping in the bit blocks of the group DCI;
• and
• wherein the step of setting bit values of the bitmap mapping in the bit blocks of the group DCI comprises:
• selecting P bit blocks for setting a receiving state value corresponding to the HARQ process of the user to be fed back, and defining the P bit blocks as valid bit blocks;
• and
• defining, in the case that P<N, bit blocks except the P bit blocks among the N bit blocks as invalid bit blocks, wherein values of the invalid bit blocks are set by at least one of:
• setting each invalid bit block to the same value as at least one valid bit block among the P bit blocks;
• or
• setting values of all invalid bit blocks to 0 or 1 or other preset values.