[srslte-users] S1 handover

[Francisco Paisana]

Hey,

Using the same clock source for both eNBs is helpful to avoid that any
frequency offset affects the UE cell measurements. This is the sort of
synchronization that is hard to achieve via network signaling. So, I would
definitely suggest using a GPS or external device as a reference.

I never experimented with handover between B210 and LimeSDR, so I would be
interested in hearing about your results. At the moment, I don't see any
reason why it wouldn't work.

Regards,
Francisco

On Wed, Jun 9, 2021 at 8:23 PM Modyngs <mobilebackup95 at gmail.com> wrote:

> Thanks for the replay
>
> Can we also use B210 as master eNB and limesdr as slave eNB to do s1
> handover?
>
> Also I think they should be sync to each other! If yes do we need some GPS
> signal or some external device to be placed in order to Handover between
> two eNBs while using COTS UE, or they will sync using EPC signals?
>
>
> P.S : I'm gonna use 3 PCs. One for EPC, one for master eNB using B210 and
> the other slave eNB using limesdr. COTS would be a samsung S series!
>
> Is this setup theoretically work?
>
> Thanks
> Best regards
>
> On Wed, 9 Jun 2021, 01:07 Francisco Paisana, <francisco at srs.io> wrote:
>
>> Hey,
>>
>> The S1 and intra-eNB handover should work with COTS UEs. For the S1
>> Handover, you will need two RF front-ends to run as source and target enbs.
>> We support both intra-frequency and inter-frequency handover. For the
>> latter, you will have to set up the measurement gap period in the rr.conf
>> file.
>>
>> Regards,
>> Francisco
>>
>> On Tue, Jun 8, 2021 at 8:21 PM Modyngs <mobilebackup95 at gmail.com> wrote:
>>
>>>
>>>
>>> Hi, I was reading the Handover application Note of SRS docs.
>>>
>>> Saw that the S1 Handover needs ZMQ( GRC Broker) to manage the gain and
>>> Handover procedure
>>>
>>>
>>> But is it possible not to use the ZMQ when you are testing with COTS UE?
>>>
>>> I can confirm that the procedure works with srsUE and GRC together, So
>>> can we just omit the srsUE & GRC and replace them with real UE and test the
>>> S1 Handover without the GRC BROKER?
>>>
>>> Thanks
>>> _______________________________________________
>>> srslte-users mailing list
>>> srslte-users at lists.softwareradiosystems.com
>>> https://lists.softwareradiosystems.com/mailman/listinfo/srslte-users
>>>
>>
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