Communications methods and infrastructure equipment for providing an indication of data transmission without a radio connection
摘要
說明書
If at step 830 it is determined that there are no more MAC subheaders to process then the communications device 104 determines that the modified random access response 612 does not comprise a MAC RAR intended for the communications device 104; that is to say the modified random access response 612 has not been sent in response to the random access request 406 transmitted by the communications device 104 in step 740. Control may then return to step 760.
If at step 820 it is determined that the RAPID header field 516 indicates the preamble index associated with the preamble used in the random access request 406 transmitted at step 740 then control passes to step 850 and the communications device 104 extracts the DL EDT data 620 from the modified random access request 612.
Control then passes to step 860 in which the communications device 104 determines uplink communications resources allocated for the purposes of transmission of acknowledgement information by the communications device 104. The allocated uplink communications resources may be indicated in a conventional manner in the UL grant header field 556 of the MAC RAR 550 corresponding to the MAC subheader 510 containing the RAPID header field 516 indicating the index of the preamble. Finally at step 870 the communications device 104 transmits acknowledgement information indicating whether or not the DL EDT data 620 was correctly received and decoded from the modified random access response 612. The acknowledgment information is transmitted using the allocated uplink communications resources determined at step 860.
