Access Method of Wireless Communication Network

Abstract

A wireless communication system, including: a device configured to: store a access parameter; transit a Radio Resource Control (RRC) CONNECTED mode to an RRC IDLE mode; and transmit a first message for the access request when in the IDLE mode and storing the access parameter; and a base station configured to: receive the first message; and after receiving the first message, transmit to the terminal a second message indicating that the access parameter is valid or third message indicating the access request is rejected.

What is claimed is: 
     
         1 . A wireless communication system, comprising:
 a device for use as a terminal in a wireless communication network, the device configured to:
 store an access parameter for gaining access to the wireless communication network, the access parameter having been received in system information from the network; 
 transit a first mode to a second mode; and 
 transmit a first message for an access request when in the second mode based on the access parameter; and 
   a base station of the wireless communication network configured to:
 receive the first message; and 
 after receiving the first message, transmit to the device a second message indicating that the access request is accepted when the access parameter is valid or a third message indicating the access request is rejected when the access parameter is not valid. 
   
     
     
         2 . A device for use as a terminal in a wireless communication network, the device comprising:
 a memory configured to store an access parameter for gaining access to the wireless communication network, the access parameter having been received in system information from the network;   a controller circuitry configured to transit a first mode to a second mode;   a transmitter configured to transmit to a base station of the wireless communication network a first message for an access request when in the second mode based on the access parameter; and   a receiver configured to, after the transmitting of the first message, receive from the base station a second message indicating that the access request is accepted when the access parameter is valid or a third message indicating the access request is rejected when the access parameter is not valid.   
     
     
         3 . The device according to  claim 2 , wherein the receiver receives a system information message, and the controller circuitry decides whether to use, for the access request, the stored access parameter based on the received system information message, depending on the outcome. 
     
     
         4 . The device according to  claim 2  wherein the first message is a random access request including:
 a preamble from among a set of random access preambles; and/or 
 a transmission timing from among a plurality of possible timings; and/or 
 a transmission frequency from among a plurality of possible frequencies; and/or 
 a duration in time from a plurality of possible durations; and/or 
 an extent in frequency from among a plurality of possible frequency ranges; and/or 
 a repetition sequence of signals such as preambles in the time and/or frequency domain from among a plurality of repetition sequences. 
 
     
     
         5 . The device according to  claim 2  wherein the first message is PRACH (Physical Random Access Channel) Signature, and the second message is Random Access Response. 
     
     
         6 . The device according to  claim 2  wherein the first message is used to request connection with the base station using the access parameter. 
     
     
         7 . A base station of a wireless communication network, the base station comprising:
 a receiver configured to receive from a device, for use as a terminal in the wireless communication network, a first message, the first message being an access request on the basis of configuration information by the device based on an access parameter and that has transited from a first mode to a second mode, the access parameter having been received in system information from the network; and   a transmitter configured to, after receiving of the first message, transmit to the device a second message indicating that the access request is accepted when the access parameter is valid or a third message indicating the access request is rejected when the access parameter is not valid.   
     
     
         8 . The base station according to  claim 7  wherein the first message is PRACH (Physical Random Access Channel) Signature, and the second message is Random Access Response. 
     
     
         9 . The base station according to  claim 7  wherein the first message is used to request connection with the base station using the access parameter.