Long term evolution-M resource reservation using bitmap
A method and network node for flexible indication of resources in LTE-M using bitmaps are disclosed. According to one aspect, a method includes indicating to the wireless device a set of reserved resources for machine communications in compatibility with a broadband radio access technology sharing resources in a time frame and frequency band that encompasses the set of reserved resources, the indicating using a two level bitmap operating in the time-domain, a first bitmap level of the two level bitmap indicating a first set of subframes containing reserved resources, and a second bitmap level of the two level bitmap indicating reserved symbols within an indicated subframe.
1. A network node configured to communicate with a wireless device (WD), the network node comprising processing circuitry configured to:
indicate to the wireless device a set of reserved resources for machine communications in compatibility with a broadband radio access technology sharing resources in a time frame and frequency band that encompasses the set of reserved resources, the indicating using a two level bitmap operating in the time-domain, a first bitmap level of the two level bitmap indicating a first set of subframes containing reserved resources, and a second bitmap level of the two level bitmap indicating reserved symbols within an indicated subframe, wherein the first bitmap level of the two level bitmap indicates whether a subframe is available or partially available for Long Term Evolution Machine Communications (LTE-M).
2. The network node of claim 1 , wherein the indicated reserved resources are unused for Long Term Evolution Machine Communications (LTE-M) transmissions.
3. The network node of claim 1 , wherein resources not indicated as reserved resources are used for LTE-M transmissions.
4. The network node of claim 1 , wherein the processing circuitry is further configured to indicate to the wireless device a set resource blocks using a third bitmap, the third bitmap indicating for which resource blocks in frequency domain the time-domain resource reservation indicated by the two level bitmap applies.
5. The network node of claim 1 , wherein a granularity of a resource reservation is based on an overhead of bitmaps.
6. The network node of claim 1 , wherein the processing circuitry is further configured to define multiple pairs of two-level bitmaps, within each pair, the first bitmap level of the two level bitmap indicating a subset of subframes and the second bitmap level of the two level bitmap indicating a granularity of resource reservation.
7. The network node of claim 5 , wherein the second bitmap level of a first pair of two-level bitmaps is of indicates a resource reservation granularity that is different from a second bitmap level of a second pair of two-level bitmaps.
8. The network node of claim 5 , wherein a first subset of subframes indicated by the first bitmap level of a first pair of two-level bitmaps and a second subset of frames indicated by the first bitmap level of a second pair of two-level bitmaps do not overlap.
9. The network node of claim 1 , wherein the processing circuitry is further configured to jointly encode a bitmap indicated by the first bitmap level of the two level bitmap with a bitmap indicating that a particular subframe indicated by the first bitmap level of the two level bitmap is fully valid, partially valid or invalid.
10. A method in a network node configured to communicate with a wireless device (WD), the method comprising:
indicating to the wireless device a set of reserved resources for machine communications in compatibility with a broadband radio access technology sharing resources in a time frame and frequency band that encompasses the set of reserved resources, the indicating using a two level bitmap operating in the time-domain, a first bitmap level of the two level bitmap indicating a first set of subframes containing reserved resources, and a second bitmap level of the two level bitmap indicating reserved symbols within an indicated subframe, wherein the first bitmap level of the two level bitmap indicates whether a subframe is available or partially available for Long Term Evolution Machine Communications (LTE-M).
11. The method of claim 10 , wherein the indicated reserved resources are unused for Long Term Evolution Machine Communications (LTE-M) transmissions.
12. The method of claim 10 , wherein resources not indicated as reserved resources are used for LTE-M transmissions.
13. The method of claim 10 , further comprising indicating to the wireless device a set resource blocks using a third bitmap, the third bitmap indicating for which resource blocks in frequency domain the time-domain resource reservation indicated by the two level bitmap applies.
14. The method of claim 10 , wherein a granularity of a resource reservation is based on an overhead of bitmaps.
15. The method of claim 10 , further comprising defining multiple pairs of two-level bitmaps, within each pair, the first bitmap level of the two level bitmap indicating a subset of subframes and the second bitmap level of the two level bitmap indicating a granularity of resource reservation.
16. The method of claim 14 , wherein the second bitmap level of a first pair of two-level bitmaps is of indicates a resource reservation granularity that is different from a second bitmap level of a second pair of two-level bitmaps.
17. The method of claim 14 , wherein a first subset of subframes indicated by the first bitmap level of a first pair of two-level bitmaps and a second subset of frames indicated by the first bitmap level of a second pair of two-level bitmaps do not overlap.
18. The method of claim 10 , further comprising jointly encoding a bitmap indicated by the first bitmap level of the two level bitmap with a bitmap indicating that a particular subframe indicated by the first bitmap level of the two level bitmap is fully valid, partially valid or invalid.
19. A wireless device (WD) configured to communicate with a network node, the wireless device comprising processing circuitry configured to:
receive an indication from the network node, the indication indicating a set of reserved resources for machine communications in compatibility with a broadband radio access technology sharing resources in a time frame and frequency band that encompasses the set of reserved resources, the indicating using a two level bitmap, a first bitmap level of the two level bitmap indicating a first set of subframes containing reserved resources, and a second bitmap level of the two level bitmap indicating reserved symbols within an indicated subframe, wherein the first bitmap level of the two level bitmap indicates whether a subframe is available or partially available for Long Term Evolution Machine Communications (LTE-M).
20. A method in a wireless device (WD), the method comprising:
receiving an indication from the network node, the indication indicating a set of reserved resources for machine communications in compatibility with a broadband radio access technology sharing resources in a time frame and frequency band that encompasses the set of reserved resources, the indicating using a two level bitmap, a first bitmap level of the two level bitmap indicating a first set of subframes containing reserved resources, and a second bitmap level of the two level bitmap indicating reserved symbols within an indicated subframe, wherein the first bitmap level of the two level bitmap indicates whether a subframe is available or partially available for Long Term Evolution Machine Communications (LTE-M).