Methods, terminal devices, network elements and apparatuses for random access process

Abstract

Embodiments of the present disclosure relate to methods, terminal devices, network nodes and apparatus for random access process in a wireless network. The method at the terminal device may comprise: receiving additional information related to a terminal device together with a random access preamble. With embodiments of the present disclosure, the additional information related to a terminal device can be transmitted to the network node together with a random access preamble; in such a case, further useful information is available for the eNB, which might substantially facilitate the random access process for either initial access or non-initial access.

What is claimed is: 
     
         1 . A method performed by a terminal device, the method comprising:
 receiving, from a network device, a configuration information for performing a random access procedure,
 wherein the configuration information comprises an indication related with a number of symbols for transmitting an uplink information; and 
   transmitting a random access preamble and the uplink information based on the configuration information,   wherein the random access preamble is transmitted in a physical random access channel and the uplink information is transmitted in a physical uplink channel, and   wherein the uplink information comprises a cell radio network temporary identifier (C-RNTI) and is transmitted after the random access preamble.   
     
     
         2 . The method of  claim 1 , wherein the uplink information comprises an identifier of the terminal device. 
     
     
         3 . The method of  claim 1 , wherein the uplink information further comprises one or more of:
 a valid cell radio network temporary identifier;   a transmission beam power;   a preferred modulation and coding scheme;   a failure beam identifier;   a candidate beam identifier;   an uplink control channel resource indication; and   a downlink reference signal measurement value.   
     
     
         4 . The method of  claim 1 , wherein the uplink information is transmitted in a guard time or a subcarrier guard band. 
     
     
         5 . The method of  claim 1 , wherein the uplink information is transmitted in at least one of an uplink pilot time slot following the random access preamble or a guard period close to the uplink pilot time slot for transmitting the random access preamble. 
     
     
         6 . The method of  claim 1 , further comprising:
 receiving a resource configuration indication to indicate the time and frequency resource for the transmitting of the preamble and the uplink information.   
     
     
         7 . The method of  claim 6 , wherein the resource configuration indication is transmitted by at least one of system information, a downlink control channel, or a terminal device specific higher layer signaling; and/or
 wherein the resource configuration indication comprises one or more of:
 a preamble time domain position indication; 
 a preamble frequency domain position indication; 
 a related beam group indication; 
 a preamble orthogonal cover code indication; or 
 an uplink transmission resource indication for the uplink information. 
   
     
     
         8 . The method of  claim 1 , further comprising:
 identifying an uplink failure beam identifier from a transmission resource position of an uplink beam failure recovery request.   
     
     
         9 . A method comprising:
 transmitting, from a network device, a configuration information for performing a random access procedure,
 wherein the configuration information comprises an indication related with a number of symbols for transmitting an uplink information; and 
   receiving a random access preamble and the uplink information based on the configuration information,   wherein the random access preamble is received in a physical random access channel and the uplink information is received in a physical uplink channel   wherein the uplink information comprises a cell radio network temporary identifier (C-RNTI) and is received after the random access preamble.   
     
     
         10 . The method of  claim 9 , wherein the uplink comprises an identifier of the terminal device. 
     
     
         11 . The method of  claim 9 , wherein the uplink information further comprises one or more of:
 a valid cell radio network temporary identifier;   a transmission beam power;   a preferred modulation and coding scheme;   a failure beam identifier;   a candidate beam identifier;   an uplink control channel resource indication; and   a downlink reference signal measurement value.   
     
     
         12 . The method of  claim 9 , wherein the uplink information is received in a guard time or a subcarrier guard band. 
     
     
         13 . The method of  claim 9 , wherein the uplink information is received in at least one of an uplink pilot time slot following the random access preamble or a guard period close to the uplink pilot time slot for transmitting the random access preamble. 
     
     
         14 . The method of  claim 9 , further comprising:
 transmitting a resource configuration indication to indicate the time and frequency resource for the transmitting of the preamble and the uplink information.   
     
     
         15 . The method of  claim 15 , wherein the resource configuration indication is received by at least one of system information, a downlink control channel, or a terminal device specific higher layer signaling; and/or
 wherein the resource configuration indication comprises one or more of:
 a preamble time domain position indication; 
 a preamble frequency domain position indication; 
 a related beam group indication; 
 a preamble orthogonal cover code indication; or 
 an uplink transmission resource indication for the uplink information. 
   
     
     
         16 . The method of  claim 9 , further comprising:
 transmitting an uplink beam failure recovery request at a transmission resource position identifying an uplink failure beam identifier.   
     
     
         17 . A terminal device, comprising:
 a transceiver configured to transmit and/or receive signals; and   a controller, configured to process received signals and/or signals to be transmitted,   wherein the transceiver and/or the controller are configured to perform the method of  claim 1 .