Enhanced cell global identifier reporting
Embodiments include methods implemented in a wireless device for reporting of a cell global identifier (CGI) in a wireless network. In one embodiment, a method comprises receiving a synchronization signal/physical broadcast channel (SS/PBCH) block from a network node; locating a control resource set (CORESET) configured by the network node through determining a frequency position of the CORESET based on a value received from the network node through radio resource control signaling; and determining and reporting the CGI to the network node based on the located CORESET. In another embodiment, the CORESET is located through testing a set of one or more reference frequency candidates from which a frequency position of the CORESET is determined.
1. A method implemented in a wireless device for reporting of a cell global identifier (CGI) in a wireless network, the method comprising:
receiving a synchronization signal/physical broadcast channel (SS/PBCH) block from a network node;
locating a control resource set (CORESET) configured by the network node through determining a frequency position of the CORESET based on a value received from the network node through radio resource control signaling; and
determining and reporting the CGI to the network node based on the located CORESET, wherein determining and reporting a CGI based on the located CORESET further comprises:
decoding a physical downlink control channel in a search space associated with the CORESET; and
reading a system information block to determine the CGI.
2. The method of claim 1 , wherein the value indicates a frequency offset between the CORESET and the SS/PBCH block, wherein the frequency position of the CORESET is determined based on a subtraction of the frequency offset from the frequency position of the SS/PBCH block.
3. The method of claim 1 , wherein the value directly indicates the frequency position of the CORESET.
4. The method of claim 1 , wherein the value indicates a reference frequency of a resource block boundary, and the frequency position of the CORESET is determined based on an offset, provided by a master information block (MIB) contained in the received SS/PBCH block, indicating a physical resource block offset between the reference frequency and a frequency of a lowest indexed subcarrier of the CORESET.
5. The method of claim 1 , wherein the value indicates a reference frequency offset between a first and second resource block boundary, and the frequency position of the CORESET is determined based on:
the value,
a first offset indicating a physical resource block offset between the first resource block boundary and a lowest indexed subcarrier of the CORESET, and
a second offset indicating a difference between the second resource block boundary and a lowest indexed subcarrier of the SS/PBCH block,
the first and second offsets being provided by a master information block (MIB) contained in the received SS/PBCH block.
6. The method of claim 1 , wherein the value indicates one of a reference frequency or a reference frequency offset, wherein the reference frequency is the frequency location of a hypothetically transmitted SS/PBCH block and the reference frequency offset is the frequency offset between the hypothetically transmitted SS/PBCH block and the received SS/PBCH block, and the frequency position of the CORESET is determined based on:
a first offset indicating a physical resource block offset between a resource block boundary and a lowest indexed subcarrier of the CORESET, and
a second offset indicating a difference between the resource block boundary and a lowest indexed subcarrier of the hypothetically transmitted SS/PBCH block,
the first and second offsets being provided by a master information block (MIB) contained in the received SS/PBCH block.
7. The method of claim 1 , wherein the value is provided in a report configuration information element (IE) received from the network node.
8. The method of claim 1 , wherein the value is provided in a measurement object information element (IE) received from the network node.
9. The method of claim 1 , wherein the value indicates a new radio absolute radio frequency channel number (ARFCN), a global synchronization channel number (GSCN), or a frequency expressed in Hz.
10. The method of claim 1 , wherein the value indicates a number of subcarriers, a number of resource blocks, or a number of physical resource blocks.
11. A method implemented in a wireless device for reporting of a cell global identifier (CGI) in a wireless network, the method comprising:
receiving a synchronization signal/physical broadcast channel (SS/PBCH) block from a network node;
locating a control resource set (CORESET) configured by the network node through testing a set of one or more reference frequency candidates from which a frequency position of the CORESET is determined; and
determining and reporting a CGI to the network node based on the located CORESET, wherein determining and reporting the CGI based on the located CORESET further comprises reading a system information block to determine the CGI.
12. The method of claim 11 , wherein the set of one or more reference frequency candidates comprises a set of synchronization raster frequencies that are within a threshold amount away from the frequency position of the SS/PBCH block.
13. The method of claim 11 , wherein the set of one or more reference frequency candidates comprises a synchronization raster frequency within the same sub-band or channel as the frequency location of the SS/PBCH block.
14. The method of claim 11 , wherein the set of one or more reference frequency candidates comprises a set of synchronization raster frequencies within the same sub-band or channel as the frequency location of the SS/PBCH block.
15. The method of claim 11 , wherein the number of reference frequency candidates in the set depends on the bandwidth of another network node, an identity of which is reported as the CGI.
16. The method of claim 11 , wherein a reference frequency candidate corresponds to the frequency of a resource block boundary, and the frequency position of the CORESET is determined based on an offset, provided by a master information block (MIB) contained in the received SS/PBCH block, indicating a physical resource block offset between the resource block boundary and the frequency of a lowest indexed subcarrier of the CORESET.
17. The method of claim 11 , wherein a reference frequency candidate corresponds to the frequency location of a hypothetically transmitted SS/PBCH block, and the frequency position of the CORESET is determined based on:
a first offset indicating a physical resource block offset between a resource block boundary and a lowest indexed subcarrier of the CORESET, and
a second offset indicating a difference between the resource block boundary and a lowest indexed subcarrier of the hypothetically transmitted SS/PBCH block,
the first and second offsets being provided by a master information block (MIB) contained in the received SS/PBCH block.
18. The method of claim 11 , wherein testing the set of one or more reference frequency candidates comprises:
selecting a reference frequency candidate from the set;
determining a hypothesized frequency position of the CORESET based on the reference frequency candidate;
decoding a physical downlink control channel in a search space associated with the CORESET based on the hypothesized frequency position of the CORESET; and
confirming the hypothesized frequency position when the decoded physical downlink control channel passes an error detection check, and rejecting the hypothesized frequency position and selecting another reference frequency candidate from the set to test otherwise.
19. A wireless device to report a cell global identifier (CGI) in a wireless network, the wireless device comprising:
processing circuitry and device readable medium coupled to the processing circuitry, wherein the device readable medium stores instructions, which when executed, are capable of causing the wireless device to perform:
receiving a synchronization signal/physical broadcast channel (SS/PBCH) block from a network node;
locating a control resource set (CORESET) configured by the network node through determining a frequency position of the CORESET based on a value received from the network node through radio resource control signaling; and
determining and reporting the CGI to the network node based on the located CORESET, wherein determining and reporting a CGI based on the located CORESET further comprises:
decoding a physical downlink control channel in a search space associated with the CORESET; and
reading a system information block to determine the CGI.
20. The wireless device of claim 19 , wherein the value indicates a frequency offset between the CORESET and the SS/PBCH block, wherein the frequency position of the CORESET is determined based on a subtraction of the frequency offset from the frequency position of the SS/PBCH block.
21. The wireless device of claim 19 , wherein the value directly indicates the frequency position of the CORESET.
22. The wireless device of claim 19 , wherein the value indicates a reference frequency of a resource block boundary, and the frequency position of the CORESET is determined based on an offset, provided by a master information block (MIB) contained in the received SS/PBCH block, indicating a physical resource block offset between the reference frequency and a frequency of a lowest indexed subcarrier of the CORESET.
23. The wireless device of claim 19 , wherein the value indicates a reference frequency offset between a first and second resource block boundary, and the frequency position of the CORESET is determined based on:
the value,
a first offset indicating a physical resource block offset between the first resource block boundary and a lowest indexed subcarrier of the CORESET, and
a second offset indicating a difference between the second resource block boundary and a lowest indexed subcarrier of the SS/PBCH block,
the first and second offsets being provided by a master information block (MIB) contained in the received SS/PBCH block.
24. The wireless device of claim 19 , wherein the value indicates one of a reference frequency or a reference frequency offset, wherein the reference frequency is the frequency location of a hypothetically transmitted SS/PBCH block and the reference frequency offset is the frequency offset between the hypothetically transmitted SS/PBCH block and the received SS/PBCH block, and the frequency position of the CORESET is determined based on:
a first offset indicating a physical resource block offset between a resource block boundary and a lowest indexed subcarrier of the CORESET, and
a second offset indicating a difference between the resource block boundary and a lowest indexed subcarrier of the hypothetically transmitted SS/PBCH block,
the first and second offsets being provided by a master information block (MIB) contained in the received SS/PBCH block.
25. A wireless device to report a cell global identifier (CGI) in a wireless network, the wireless device comprising:
processing circuitry and device readable medium coupled to the processing circuitry, wherein the device readable medium stores instructions, which when executed, are capable of causing the wireless device to perform:
receiving a synchronization signal/physical broadcast channel (SS/PBCH) block from a network node;
locating a control resource set (CORESET) configured by the network node through testing a set of one or more reference frequency candidates from which a frequency position of the CORESET is determined; and
determining and reporting a CGI to the network node based on the located CORESET, wherein determining and reporting the CGI based on the located CORESET further comprises reading a system information block to determine the CGI.
26. The wireless device of claim 25 , wherein the set of one or more reference frequency candidates comprises a set of synchronization raster frequencies that are within a threshold amount away from the frequency position of the SS/PBCH block.
27. The wireless device of claim 25 , wherein the set of one or more reference frequency candidates comprises a synchronization raster frequency within the same sub-band or channel as the frequency location of the SS/PBCH block.
28. The wireless device of claim 25 , wherein the set of one or more reference frequency candidates comprises a set of synchronization raster frequencies within the same sub-band or channel as the frequency location of the SS/PBCH block.