Method, device, computer-readable storage and carrier for random access

Abstract

The present disclosure provides a method a user equipment (UE) to perform random access to a radio network comprising an uplink physical resource configuration (UL) and supplementary physical resource configuration (SUL). A random access request containing a preamble may be transmitted from the UE to the radio network on a physical random access channel (PRACH) of one of the uplink physical resource configuration or the supplementary uplink physical resource configuration. A random access response for the UE indicating the physical resource configuration on whose PRACH the random access request was sent may be received at the UE, wherein the indication is made by a Random Access Radio Network Temporary Identifier (RA-RNTI) used to identify the random access response. The radio network may be accessed by the UE based on information in the random access response.

1 . A method performed by a communication device for random access to a radio network having a plurality of uplink physical resource configurations, the method comprising:
 transmitting, to a network device, a random access request containing a preamble selected by the communication device;   receiving, from the network device, a random access response corresponding to the preamble indicating the uplink physical resource configuration on whose physical random access channel, PRACH, the random access request was sent; and   accessing the radio network using resources indicated by the random access response.   
     
     
         2 . The method of  claim 1 , wherein the transmitting is on the PRACH of the uplink physical random access channel. 
     
     
         3 . The method of  claim 1 , wherein the uplink physical resource configuration comprises at least one of a 5G uplink physical resource configuration and a 5G supplementary uplink physical resource configuration. 
     
     
         4 . The method of  claim 1 , wherein the resources comprise a parameter of Random Access Radio Network Temporary Identity, RA-RNTI, in the random access response. 
     
     
         5 . The method of  claim 4 , wherein the RA-RNTI comprises and first index of a slot where the preamble transmission starts and a second index of the PRACH within the slot. 
     
     
         6 . The method of  claim 5 , wherein the first index and the second index, respectively, comprise separate numberings and granularities on PRACHs of different of the plurality of uplink physical resource configurations. 
     
     
         7 . The method of  claim 4 , further comprising a third index, wherein the third index is an index of the uplink physical resource configuration on whose PRACH the random access request was sent. 
     
     
         8 . The method of  claim 1 , wherein the resources comprise a parameter of Downlink Control Information, DCI, in the random access response. 
     
     
         9 . The method of  claim 8 , wherein the DCI comprises and index indicating the uplink physical resource configuration on whose PRAH the random access request was sent. 
     
     
         10 . The method of  claim 8 , wherein the DCI comprises a pointer pointing to a Physical Resource Block, PRB, region identifying the uplink physical resource configuration on whose PRACH the random access request was sent. 
     
     
         11 . The method of  claim 1 , wherein the random access response comprises at least two grant fields dedicated for respective uplink physical resource configurations to indicate grants of random access for the communication device that sends the random access request in one of the respective uplink physical resource configurations. 
     
     
         12 . The method of  claim 1 , wherein the preamble selected is selected from a plurality of preambles for contention based further access and wherein the plurality of preambles comprise two groups of preambles dedicated for 5G uplink and 5G supplementary uplink, respectively. 
     
     
         13 . A method performed by a network device to control random access of one or more communication devices to a radio network having a plurality of uplink physical resource configurations, the method comprising:
 receiving, from a communication device, a random access request containing a preamble selected by the communication device;   determining resources to include in a random access response for the communication device; and   transmitting, to the communication device, the random access response corresponding to the preamble indicating the resources comprising an uplink physical resource configuration on whose physical random access channel, PRACH, the random access response was sent.   
     
     
         14 . The method of  claim 13 , wherein random access request is received on the PRACH of the uplink physical random access channel. 
     
     
         15 . The method of  claim 13 , wherein the uplink physical resource configuration comprises at least one of a 5G uplink physical resource configuration and a 5G supplementary uplink physical resource configuration. 
     
     
         16 . The method of  claim 13 , wherein the resources comprise a parameter of Random Access Radio Network Temporary Identity, RA-RNTI, in the random access response. 
     
     
         17 . The method of  claim 16 , wherein the RA-RNTI comprises and first index of a slot where the preamble transmission starts and a second index of the PRACH within the slot. 
     
     
         18 . The method of  claim 17 , wherein the first index and the second index, respectively, comprise separate numberings and granularities on PRACHs of different of the plurality of uplink physical resource configurations. 
     
     
         19 . The method of  claim 16 , further comprising a third index, wherein the third index is an index of the uplink physical resource configuration on whose PRACH the random access request was sent. 
     
     
         20 . The method of  claim 13 , wherein the resources comprise a parameter of Downlink Control Information, DCI, in the random access response.