Network nodes and methods for enabling access to a radio network node

Abstract

A wireless device (120) and a method for enabling access to a radio network node (110) as well as a radio network node (110) and a method for enabling the wireless device (120) to enable access to the radio network node (110) are disclosed. The wireless device (120) supports a first transmission bandwidth. The radio network node (110) operates a carrier on a second transmission bandwidth. The first transmission bandwidth is narrower than the second transmission band width. The wireless device (120) obtains (202) information about the carrier. The wireless device (120) determines (206) a mapping scheme for mapping a set of enumerable elements, e.g. resource blocks or sequence elements, to frequency ranges based on the information about the carrier.

The invention claimed is:  
     
       1. A method in a wireless device, said wireless device supporting a first transmission bandwidth associated with a first set of enumerable elements, for enabling access to a radio network node, the method comprising:
 obtaining information about a carrier operated by the radio network node, wherein:
 the carrier has a second transmission bandwidth associated with a second set of enumerable elements; and 
 the second transmission bandwidth is wider than the first transmission bandwidth; and 
   based on the information about the carrier, determining a mapping scheme for mapping the first set of enumerable elements, associated with the first transmission bandwidth, to a subset of the second set of enumerable elements associated with the second transmission bandwidth, wherein the mapping scheme comprises:
 mapping a first enumerable element of the first set to an enumerable element of the second set that corresponds to a center frequency of the second transmission bandwidth; and 
 mapping, in an alternating manner, subsequent enumerable elements of the first set to enumerable elements, of the second set, that correspond to frequencies increasingly higher and lower than the center frequency of the second transmission bandwidth. 
   
     
     
       2. The method of  claim 1 , wherein the enumerable elements comprising the first set and the second set correspond to one of resource blocks and sequence elements. 
     
     
       3. The method of  claim 1 , wherein the obtaining comprises receiving the information about the carrier from the radio network node, and wherein the information about the carrier is associated with the mapping scheme and comprises one or more of:
 a first indication for indicating a type of the carrier;   release information of the carrier;   configuration of the carrier;   a second indication for indicating the second transmission bandwidth;   a third indication for indicating a type of the mapping scheme applied to the carrier by the radio network node; and   a carrier frequency of the carrier.   
     
     
       4. The method of  claim 1 , wherein the obtaining comprises:
 receiving a transmission on a broadcast channel (BCH) from the radio network node; and   determining the information about the carrier based on a scrambling mask of a cyclic redundancy check of the transmission or a cyclic redundancy check of the transmission.   
     
     
       5. The method of  claim 1 , wherein the obtaining comprises:
 receiving synchronization and/or reference signals; and   determining the information about the carrier based on a duration between the synchronization and/or reference signals.   
     
     
       6. The method of  claim 1 , wherein the first set extends over the first transmission bandwidth. 
     
     
       7. The method of  claim 1 , wherein the mapping scheme further comprises mapping virtual enumerable elements associated with the second set to the enumerable elements comprising the first set. 
     
     
       8. A method in a wireless device, said wireless device supporting a first transmission bandwidth associated with a first set of enumerable elements, for enabling access to a radio network node, the method comprising:
 obtaining information about a carrier operated by the radio network node, wherein: 
 the carrier has a second transmission bandwidth associated with a second set of enumerable elements; and 
 the second transmission bandwidth is wider than the first transmission bandwidth; and 
 based on the information about the carrier, determining a mapping scheme for mapping the first set of enumerable elements, associated with the first transmission bandwidth, to a subset of the second set of enumerable elements associated with the second transmission bandwidth, wherein: the mapping scheme is determined by subtracting adding an offset from to an element number of each an element associated with the second first set of enumerable elements; and the offset is determined is based on as an integer difference between a greatest element number of elements associated with the second set of enumerable elements and a greatest element number of elements associated with the first set of enumerable elements based on the obtained information about a carrier; 
 mapping the first set of enumerable elements to the second set of enumerable elements, using the mapping scheme; and 
 receiving a transmission from the radio network node, using the second set of enumerable elements and the second transmission bandwidth. 
 
     
     
       9. The method of  claim 8 , wherein the offset is further determined based on one or more of:
 time parameters; 
 a subframe number; 
 a radio frame number; 
 an identification of the wireless device; and 
 an identification of a cell of the radio network node. 
 
     
     
       10. The method of claim 1  8 , wherein each enumerable element of the first set and the second set corresponds to:
 at least one subcarrier, or 
 a respective set of 12 contiguous subcarriers of a plurality of sets of 12 contiguous subcarriers extending over at least the first transmission bandwidth. 
 
     
     
       11. The method of  claim 1 , further comprising sending, to the radio network node, a request for the access to the radio network node. 
     
     
       12. A method in a radio network node, said radio network node operating a carrier with a second transmission bandwidth associated with a second set of enumerable elements, for enabling a wireless device to access the radio network node, the method comprising:
 obtaining a mapping scheme for mapping a subset of the second set of enumerable elements to a first set of enumerable elements corresponding to a first transmission bandwidth supported by the wireless device, wherein the second transmission bandwidth is wider than the first transmission bandwidth, and wherein the mapping scheme comprises:
 mapping a first enumerable element of the first set to an enumerable element, of the second set, that corresponds to a center frequency of the second transmission bandwidth; and 
 mapping, in an alternating manner, subsequent enumerable elements of the first set to enumerable elements, of the second set, that correspond to frequencies increasingly higher and lower than the center frequency of the second transmission bandwidth; and 
   sending information about the carrier to the wireless device, wherein the information about the carrier relates to the obtained mapping scheme.   
     
     
       13. The method of  claim 12 , wherein the enumerable elements comprising the first set and the second set correspond to one of resource blocks and sequence elements. 
     
     
       14. The method of  claim 12 , wherein the information about the carrier comprises one or more of:
 a first indication for indicating a type of the carrier;   release information of the carrier;   configuration of the carrier;   a second indication for indicating the second transmission bandwidth;   a third indication for indicating a type of the mapping scheme applied to the carrier by the radio network node; and   a carrier frequency of the carrier.   
     
     
       15. The method of  claim 12 , wherein the mapping scheme further comprises mapping virtual enumerable elements associated with the second set to the enumerable elements comprising the first set. 
     
     
       16. The method of  claim 12 , further comprising receiving, from the wireless device, a request for the access to the radio network node. 
     
     
       17. The method of  claim 12 , wherein each enumerable element of the first set and the second set corresponds to:
 at least one subcarrier, or   a respective set of 12 contiguous subcarriers of a plurality of sets of 12 contiguous subcarriers extending over at least the first transmission bandwidth.   
     
     
       18. A wireless device, said wireless device supporting a first transmission bandwidth associated with a first set of enumerable elements, configured to enable access to a radio network node, the wireless device comprising:
 a processing circuit configured to:
 obtain information about a carrier operated by the radio network node, wherein:
 the carrier has a second transmission bandwidth associated with a second set of enumerable elements; and 
 the second transmission bandwidth is wider than the first transmission bandwidth; and 
 
 based on the information about the carrier, determine a mapping scheme for mapping the first set of enumerable elements, associated with the first transmission bandwidth, to a subset of the second set of enumerable elements associated with the second transmission bandwidth,
 wherein the mapping scheme comprises: 
 mapping a first enumerable element of the first set to an enumerable element, of the second set, that corresponds to a center frequency of the second transmission bandwidth; and 
 mapping, in an alternating manner, subsequent enumerable elements of the first set to enumerable elements, of the second set, that correspond to frequencies increasingly higher and lower than the center frequency of the second transmission bandwidth. 
 
   
     
     
       19. The wireless device of  claim 18 , wherein the enumerable elements comprising the first set and the second set correspond to one of resource blocks and sequence elements. 
     
     
       20. The wireless device of  claim 18 , wherein the processing circuit is further configured to receive the information about the carrier from the radio network node, and wherein the information about the carrier is associated with the mapping scheme and comprises one or more of:
 a first indication for indicating a type of the carrier;   release information of the carrier;   configuration of the carrier;   a second indication for indicating the second transmission bandwidth;   a third indication for indicating a type of the mapping scheme applied to the carrier by the radio network node; and   a carrier frequency of the carrier.   
     
     
       21. The wireless device of  claim 18 , wherein the processing circuit further configured to:
 receive a transmission on a broadcast channel (BCH) from the radio network node; and   determine the information about the carrier based on a scrambling mask of a cyclic redundancy check of the transmission or a cyclic redundancy check of the transmission.   
     
     
       22. The wireless device of  claim 18 , wherein the processing circuit is further configured to:
 receive synchronization and/or reference signals; and   determine the information about the carrier based on a duration between the synchronization and/or reference signals.   
     
     
       23. The wireless device of  claim 18 , wherein the first set extends over the first transmission bandwidth. 
     
     
       24. The wireless device of  claim 18 , wherein the mapping scheme further comprises mapping virtual enumerable elements associated with the second set to the enumerable elements comprising the first set. 
     
     
       25. A wireless device, said wireless device supporting a first transmission bandwidth associated with a first set of enumerable elements, configured to enable access to a radio network node, the wireless device comprising:
 a processing circuit configured to:
 obtain information about a carrier operated by the radio network node, wherein: 
 the carrier has a second transmission bandwidth associated with a second set of enumerable elements; and 
 the second transmission bandwidth is wider than the first transmission bandwidth; and 
 based on the information about the carrier, determine a mapping scheme for mapping the first set of enumerable elements, associated with the first transmission bandwidth, to a subset of the second set of enumerable elements associated with the second transmission bandwidth, wherein: the mapping scheme is determined by subtracting adding an offset from to an element number of each an element associated with the second first set of enumerable elements; and the offset is determined based on as an integer difference between a greatest element number of elements associated with the second set of enumerable elements and a greatest element number of elements associated with the first set of enumerable elements based on the obtained information about a carrier; 
 map the first set of enumerable elements to the second set of enumerable elements, using the mapping scheme; and 
 receive a transmission from the radio network node, using the second set of enumerable elements and the second transmission bandwidth. 
 
 
     
     
       26. The wireless device of  claim 25 , wherein the offset is further determined based on one or more of:
 time parameters; 
 a subframe number; 
 a radio frame number; 
 an identification of the wireless device; and 
 an identification of a cell of the radio network node. 
 
     
     
       27. The wireless device of claim 18  25 , wherein each enumerable element of the first set and the second set corresponds to:
 at least one subcarrier, or 
 a respective set of 12 contiguous subcarriers of a plurality of sets of 12 contiguous subcarriers extending over at least the first transmission bandwidth. 
 
     
     
       28. The wireless device of  claim 18 , wherein the processing circuit is further configured to send, to the radio network node, a request for the access to the radio network node. 
     
     
       29. A radio network node, said radio network node operating a carrier with a second transmission bandwidth associated with a second set of enumerable elements, configured to enable a wireless device to access to the radio network node, the radio network node comprising:
 a processing circuit configured to:
 obtain a mapping scheme for mapping a subset of the second set of enumerable elements to a first set of enumerable elements corresponding to a first transmission bandwidth supported by the wireless device, wherein the second transmission bandwidth is wider than the first transmission bandwidth, and wherein the mapping scheme comprises:
 mapping a first enumerable element of the first set to an enumerable element, of the second set, that corresponds to a center frequency of the second transmission bandwidth; and 
 mapping, in an alternating manner, subsequent enumerable elements of the first set to enumerable elements, of the second set, that correspond to frequencies increasingly higher and lower than the center frequency of the second transmission bandwidth; and 
 
 send information about the carrier to the wireless device, wherein the information about the carrier relates to the obtained mapping scheme. 
   
     
     
       30. The radio network node of  claim 29 , wherein the enumerable elements comprising the first set and second set correspond to one of resource blocks and sequence elements. 
     
     
       31. The radio network node of  claim 29 , wherein the information about the carrier comprises one or more of:
 a first indication for indicating a type of the carrier;   release information of the carrier;   configuration of the carrier;   a second indication for indicating the second transmission bandwidth;   a third indication for indicating a type of the mapping scheme applied to the carrier by the radio network node; and   a carrier frequency of the carrier.   
     
     
       32. The radio network node of  claim 29 , wherein the mapping scheme further comprises mapping virtual enumerable elements associated with the second set to the enumerable elements comprising the first set. 
     
     
       33. The radio network node of  claim 29 , wherein the processing circuit is further configured to receive, from the wireless device, a request for the access to the radio network node. 
     
     
       34. The radio network node of  claim 29 , wherein each enumerable element of the first set and the second set corresponds to:
 at least one subcarrier, or   a respective set of 12 contiguous subcarriers of a plurality of sets of 12 contiguous subcarriers extending over at least the first transmission bandwidth.