Methods for enb, ue uplink transmission and reception

Abstract

Methods for transmitting a waveform in the wireless communication networks are provided. A method for UE to transmit to an eNB an uplink channel carrying data or control information bits, comprising: receiving a downlink channel occupying a set of downlink resource elements, where each downlink resource element has a downlink subcarrier spacing in the frequency domain and a downlink symbol duration in the time domain; generating a SC-FDMA based uplink channel from the information bits, where the uplink channel occupies a set of uplink resource elements and each uplink resource element has a uplink subcarrier spacing in the frequency domain differing from the downlink subcarrier spacing, and a uplink symbol duration in the time domain differing from the downlink symbol duration; and transmitting the SC-FDMA based uplink channel. In one embodiment, the information bits are uplink data information bits. In another embodiment, the information bits are uplink control information bits.

1 . A method, comprising:
 receiving a downlink channel by a user equipment (UE) from an eNB, wherein the downlink channel occupies a set of downlink resource elements, each downlink resource element is with a frequency domain downlink subcarrier spacing and a time domain downlink symbol duration;   generating an uplink channel carrying uplink information bits, wherein the uplink channel occupies a set of uplink resource elements, each uplink resource element is with an uplink frequency domain subcarrier spacing different from the downlink subcarrier spacing and an uplink time domain symbol duration different from the downlink symbol duration; and   transmitting the uplink channel to the eNB.   
     
     
         2 . The method of  claim 1 , wherein uplink information bits are uplink data information bits. 
     
     
         3 . The method of  claim 1 , wherein uplink information bits are uplink control information bits. 
     
     
         4 . The method of  claim 1 , wherein the uplink channel is a single carrier frequency division multiple access (SC-FDMA)-based channel. 
     
     
         5 . The method of  claim 1 , wherein the uplink frequency domain subcarrier spacing is 2.5 kHz, and the downlink frequency domain subcarrier spacing is 15 kHz. 
     
     
         6 . The method of  claim 1 , generating an uplink channel carrying uplink information bits further comprising:
 mapping the information bits to a block of QPSK or QAM symbols;   transforming the block of QPSK or QAM symbols through discrete Fourier Transform (DFT) to obtain complex-valued symbols; and   mapping the complex-valued symbols to the set of uplink resource elements.   
     
     
         7 . The method of  claim 1 , further comprising:
 transmitting the uplink channel without obtaining any timing advance information from the eNB.   
     
     
         8 . The method of  claim 1 , further comprising:
 transmitting the uplink channel without any transmission of the random access preamble.   
     
     
         9 . The method of  claim 1 , further comprising:
 obtaining system bandwidth information, uplink subcarrier spacing information, and corresponding sub-band information;   receiving an uplink assignment message from the eNB; and   generating the uplink channel based on the obtained sub-band information and the uplink assignment message.   
     
     
         10 . The method of  claim 9 , wherein the uplink assignment includes a physical resource block (PRB) index, and wherein PRB index is defined for the system bandwidth. 
     
     
         11 . The method of  claim 9 , wherein the uplink assignment includes a relative physical resource block (PRB) index within a corresponding sub-band. 
     
     
         12 . The method of  claim 1 , further comprising:
 obtaining configuration information of subcarrier spacing set and corresponding sub-bands; and   determining the uplink subcarrier spacing based on the configuration information.   
     
     
         13 . The method of  claim 1 , wherein the uplink subcarrier spacing is configured by a higher layer message from the eNB or preconfigured. 
     
     
         14 . A method, comprising:
 receiving by an eNB a first uplink channel carrying first information bits from a first user equipment (UE) on a first set of uplink resource elements, each uplink resource element has a first uplink frequency domain subcarrier spacing and a first uplink time domain symbol duration; and   receiving by the eNB a second uplink channel carrying second information bits from a second UE on a second set of uplink resource elements, wherein each uplink resource element in the second set has a second uplink frequency domain subcarrier spacing different from the first uplink frequency domain subcarrier spacing and a second uplink time domain symbol duration different from the first uplink time domain symbol duration.   
     
     
         15 . The method of  claim 14 , wherein the first and second set of uplink resource elements are not overlapping in the frequency domain while occupying the same time duration. 
     
     
         16 . The method of  claim 14 , wherein the first uplink subcarrier is the same as a downlink subcarrier spacing of downlink resource elements for the first UE. 
     
     
         17 . The method of  claim 14 , further comprising:
 indicating to the second UE the second set of uplink resource elements where each uplink resource element has the second uplink subcarrier spacing in the frequency domain differing from the first uplink subcarrier spacing, and the second symbol duration in the time domain differing from the first symbol duration based on one or more conditions.   
     
     
         18 . The method of  claim 17 , wherein the second of uplink resource elements is selected based on one or more conditions comprising: a channel condition, a transmission mode, a transport block size, a latency requirement, a UE category, a traffic type, timing advance requirement, and transmitting random access preamble requirement. 
     
     
         19 . The method of  claim 17 , wherein the second set of uplink subcarrier spacing is based on a report from the second UE. 
     
     
         20 . The method of  claim 17 , wherein the second set of uplink subcarrier spacing is based on a report from a core network entity. 
     
     
         21 . The method of  claim 14 , wherein the second uplink subcarrier is selected by the second UE from a preconfigured subcarrier spacing set. 
     
     
         22 . The method of  claim 21 , wherein the second uplink subcarrier spacing is selected by the second UE based on one or more conditions comprising: a channel condition, a transmission mode, a transport block size, a latency requirement, a UE category, a traffic type, timing advance requirement, and transmitting random access preamble requirement. 
     
     
         23 . The method of  claim 14 , wherein the second uplink carrier spacing is configured by at least one procedures comprising: higher layer signaling, eNB configuration procedure, master information block (MIB), system information block (SIB), physical layer messaging, and radio resource control (RRC).