Update 12.12.2020:
DSS Orange Romania B1+n1, tests with Xiaomi Mi10T Pro
https://forum.softpedia.com/topic/1073778-5g-orange-romania/page__st__4338#entry27261108
DSS activation in Xiaomi Mi 10T PRO: https://mt-tech.fi/en/modify-oneplus-7-pro-5g-8-and-8-pro-nr-lte-a-band-combos/#comment-787
Info: https://howltestuffworks.blogspot.com/2020/11/5g-nr-dss-dynamic-spectrum-sharing.html
DSS elements to look for:
In the UE Capabilities sent by UE: rateMatchingLTE-CRS : supported
In the rrcConnectionReconfiguration sent by the NW:
1. frequencyShift7p5khz : true
2. lte-CRS-ToMatchAround -> carrierFreqDL : 312 . 312 = EARFCN for LTE B1.
3. mbsfn-SubframeConfigList[0] info
2020-12-12T10:53:39.020 D [LTE] RRC Connection Reconfiguration/RRC Reconfiguration (PDU),Radio Bearer Config (PDU)
Length : 765
Log Code : 0xB0C0
Timestamp : 2020-12-12 10:53:38.957
LTE RRC OTA Packet
version : 26
rrcRelNum : 15
rrcVerNum : 50
nrRrcRelNum : 15
nrRrcVerNum : 90
rbId : 1
phyCellId : 408
freq : 1600 >>>> LTE B3
sfn : 5908
pduNum : 9
sibMaskInSi : 0
msgLen : 732
Channel : 6
dl-dcch
message -> c1 -> rrcConnectionReconfiguration
..........................
frequencyShift7p5khz : true
..........................
lte-CRS-ToMatchAround -> carrierFreqDL : 312 >>>> LTE B1
carrierBandwidthDL : n50
mbsfn-SubframeConfigList[0]
radioframeAllocationPeriod : n4
radioframeAllocationOffset : 0
subframeAllocation1 -> fourFrames : '10100000 00001000 00000000'B(10487808)
Previous information:
https://www.sharetechnote.com/html/5G/5G_DSS.html
https://cdn.rohde-schwarz.com/ymkt/na/content/DSS_QA.pdf
https://cafetele.com/dss-dynamic-spectrum-sharing-5g-lte/?ck_subscriber_id=648314289
1. Support in the NW: take a look at SIB2:
LTE SIB2: configure MBSFN subframe location in a radio frame
• mbsfn-SubframeConfigList - mbsfn-SubframeConfig
• SFN mod radioFrameAllocationPeriod = radioFrameAllocationOffset
• subframeAllocation to configure MBSFN subframe location, for example, configure subframes 1 and 2 as MBSFN subframe
NSG:
MBSFN configured in SIB2 to indicate DSS
additionalSpectrumEmission : 1
mbsfn-SubframeConfigList[0]
radioframeAllocationPeriod : n4
radioframeAllocationOffset : 0
subframeAllocation -> fourFrames : '11000000 00001000 00000000'B(12584960)
2. Support in the UE: look for "rateMatchingLTE-CRS : supported" in UE capabilities
UE capability: https://www.sharetechnote.com/html/5G/5G_DSS.html
https://www.sharetechnote.com/html/5G/5G_DSS.html#UE_Capability
rateMatchingLTE-CRS ENUMERATED {supported}
OnePlus 8 traces in TMO US: rateMatchingLTE-CRS : supported
LTE UE capabilities file : https://pastebin.pl/view/6141b88b
LTE RRC OTA Packet
version : 26
rrcRelNum : 15
rrcVerNum : 50
nrRrcRelNum : 15
nrRrcVerNum : 90
rbId : 1
phyCellId : 15
freq : 5070
sfn : 0
pduNum : 11
sibMaskInSi : 0
msgLen : 515
Channel : 8
ul-dcch
criticalExtensions -> c1 -> ueCapabilityInformation-r8
ue-CapabilityRAT-ContainerList[0]
rat-Type : nr
accessStratumRelease : rel15
................
supportedBandListNR[0]
bandNR : 71
................
rateMatchingLTE-CRS : supported
supportedBandListNR[1]
bandNR : 66 (see below the NSG SIB2 screenshot)
................
rateMatchingLTE-CRS : supported
Samsung Service Mode
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