Methods of Transmitting and Receiving Additional SIB1-NB Subframes in a NB-IoT Network

Abstract

According to certain embodiments, a method performed by a network node comprises transmitting a transmission of system information. The transmission comprises coded bins obtained by reading from a circular buffer. The transmission is transmitted in a first set of subframes corresponding to subframes #4 of a plurality of radio frames. The method further comprises transmitting an additional transmission of the system information. The additional transmission comprises additional coded bits obtained by continuing reading from the circular buffer. The additional transmission is transmitted in a second set of subframes corresponding to subframes of the plurality of radio frames other than subframes #4.

1 .- 26 . (canceled) 
     
     
         27 . A method for use in a wireless device, the method comprising:
 receiving, from a network node, a transmission of system information, the transmission comprising coded bits received in a first set of subframes corresponding to subframes #4 of a plurality of radio frames;   receiving, from the network node, an additional transmission of the system information, the additional transmission comprising additional coded bits, the additional transmission received in a second set of subframes corresponding to subframes of the plurality of radio frames other than subframes #4;   wherein the coded bits and the additional coded bits are associated with indexes of a circular buffer used by the network node for obtaining the coded bits and the additional coded bits when transmitting the system information, and wherein the additional coded bits are associated with indexes continuing from indexes associated with the coded bits such that the index associated with the first additional coded bit is an incrementation by one of the index associated with the last coded bit modulo the size of the circular buffer.   
     
     
         28 . The method of  claim 27 , further comprising:
 decoding the system information using the coded bits and the additional coded bits, wherein coded bits and additional coded bits associated with the same index of the circular buffer are combined.   
     
     
         29 . The method of  claim 27 , wherein the second set of subframes correspond to subframes #3. 
     
     
         30 . The method of  claim 27 , further comprising:
 storing the coded bits and the additional coded bits in a circular buffer according to their associated indexes, wherein coded bits and additional coded bits associated with the same index of the circular buffer are combined.   
     
     
         31 . The method of  claim 27 , wherein the indexes are obtained using a modulo function based on a number of coded bits that can be mapped to the system information and the size of the circular buffer. 
     
     
         32 . The method of  claim 27 , wherein the system information comprises System Information Block Type 1-Narrowband (SIB1-NB) information. 
     
     
         33 . A method for use in a network node, the method comprising:
 transmitting a transmission of system information comprising coded bits, the transmission transmitted in a first set of subframes corresponding to subframes #4 of a plurality of radio frames; and   transmitting an additional transmission of the system information, the additional transmission comprising additional coded bits, the additional transmission transmitted in a second set of subframes corresponding to subframes of the plurality of radio frames other than subframes #4;   wherein the coded bits are obtained by reading from a circular buffer, and wherein the additional coded bits are obtained by continuing reading from the circular buffer such that the first additional coded bit is read from an index which is an incrementation by one of the index associated with the last coded bit modulo the size of the circular buffer.   
     
     
         34 . The method of  claim 33 , wherein the second set of subframes correspond to subframes #3. 
     
     
         35 . The method of  claim 33 , wherein the first set of subframes comprises eight subframes transmitted in every other subframe #4. 
     
     
         36 . The method of  claim 33 , wherein an index for reading from the circular buffer is obtained using a modulo function based on a number of coded bits that can be mapped to the system information and the size of the circular buffer. 
     
     
         37 . The method of  claim 33 , wherein the system information comprises System Information Block Type 1-Narrowband (SIB1-NB) information. 
     
     
         38 . A wireless device comprising processing circuitry operable to:
 receive, from a network node, a transmission of system information, the transmission comprising coded bits received in a first set of subframes corresponding to subframes #4 of a plurality of radio frames;   receive, from the network node, an additional transmission of the system information, the additional transmission comprising additional coded bits, the additional transmission received in a second set of subframes corresponding to subframes of the plurality of radio frames other than subframes #4,   wherein the coded bits and the additional coded bits are associated with indexes of a circular buffer used by the network node for obtaining the coded bits and the additional coded bits when transmitting the system information, and wherein the additional coded bits are associated with indexes continuing from indexes associated with the coded bits such that the index associated with the first additional coded bit is an incrementation by one of the index associated with the last coded bit modulo the size of the circular buffer.   
     
     
         39 . The wireless device of  claim 38 , wherein the processing circuitry is further operable to decode the system information using the coded bits and the additional coded bits, wherein coded bits and additional coded bits associated with the same index of the circular buffer are combined. 
     
     
         40 . The wireless device of  claim 38 , wherein the second set of subframes correspond to subframes #3. 
     
     
         41 . The wireless device of  claim 38 , wherein the processing circuitry is further operable to store the coded bits and the additional coded bits in a circular buffer according to their associated indexes, wherein coded bits and additional coded bits associated with the same index of the circular buffer are combined. 
     
     
         42 . A network node comprising processing circuitry operable to:
 transmit a transmission of system information comprising coded bits, the transmission transmitted in a first set of subframes corresponding to subframes #4 of a plurality of radio frames; and   transmit an additional transmission of the system information, the additional transmission comprising additional coded bits, the additional transmission transmitted in a second set of subframes corresponding to subframes of the plurality of radio frames other than subframes #4,   wherein the coded bits are obtained by reading from a circular buffer, and wherein the additional coded bits are obtained by continuing reading from the circular buffer such that the first additional coded bit is read from an index which is an incrementation by one of the index associated with the last coded bit modulo the size of the circular buffer.   
     
     
         43 . The network node of  claim 42 , wherein the second set of subframes correspond to subframes #3. 
     
     
         44 . The network node of  claim 42 , wherein the first set of subframes comprises eight subframes transmitted in every other subframe #4. 
     
     
         45 . The network node of  claim 42 , wherein an index for reading from the circular buffer is obtained using a modulo function based on a number of coded bits that can be mapped to the system information and the size of the circular buffer. 
     
     
         46 . The network node of  claim 42 , wherein the system information comprises System Information Block Type 1-Narrowband (SIB1-NB) information.