+ All Categories
Home > Documents > Some View on Next Generation Radio Interface - IEEE · PDF fileSome View on Next Generation...

Some View on Next Generation Radio Interface - IEEE · PDF fileSome View on Next Generation...

Date post: 06-Feb-2018
Category:
Upload: hoangmien
View: 221 times
Download: 8 times
Share this document with a friend
11
1521 IEEE 1904 Access Networks Working Group, City, Country 1 Clark Chen Senior Researcher China Mobile Research Institute Some View on Next Generation Radio Interface
Transcript
Page 1: Some View on Next Generation Radio Interface - IEEE · PDF fileSome View on Next Generation Radio Interface . ... Fron t - h a u l Micro RRU BBU Pool Carrier 0 Carrier 1 Carrier N-1

15�2�1� IEEE 1904 Access Networks Working Group, City, Country 1

Clark Chen Senior Researcher

China Mobile Research Institute

Some View on Next Generation Radio Interface

Page 2: Some View on Next Generation Radio Interface - IEEE · PDF fileSome View on Next Generation Radio Interface . ... Fron t - h a u l Micro RRU BBU Pool Carrier 0 Carrier 1 Carrier N-1

Challenges for future 5G networks�

������������

��� ���

����������������

Agility, openness, scalability, efficiency�

•  So many issues for current “hard” mobile networks

�  Time-to-market �  Service innovation �  Energy efficiency �  TCO �  Interoperability �  �

Page 3: Some View on Next Generation Radio Interface - IEEE · PDF fileSome View on Next Generation Radio Interface . ... Fron t - h a u l Micro RRU BBU Pool Carrier 0 Carrier 1 Carrier N-1

����������� ��������How to coordinate our four networks to satisfy user needs? 81x

from 2008 to 2012�� �����������

� ����� ����� ��� ����

����������

� �����������

� ������������ � ���������������������� ����� !�"#$�����$

����� !"�#$��#�� �� %��&'�

Page 4: Some View on Next Generation Radio Interface - IEEE · PDF fileSome View on Next Generation Radio Interface . ... Fron t - h a u l Micro RRU BBU Pool Carrier 0 Carrier 1 Carrier N-1

C-RAN: the revolutionary evolution towards 5G, proposed by CMCC in 2009�

(�

��)�

��)�

��)�

��)�

��)�

��)�

��)�

*�#+,�-�����&&-�

��!+#��,+�%���)�

.�/���� %"�%+��&012�-�+#� !0&#+�

�+"&#3�

���-�14�� -&,%�5&#�2� +#�-�6�%�0#&2�!!� /�

(�

Centralized Control and/or Processing��  Centralized processing

resource pool that can support 10~1000 cells�

Collaborative Radio��  Multi-cell Joint scheduling and

processing Real-Time Cloud ��  Target to Open IT platform �  Consolidate the processing

resource into a Cloud �  Flexible multi-standard

operation and migration Clean System Target��  Less power consuming �  Lower OPEX �  Fast system roll-out�

�7�&'����8�� � �����9�#+,�-�6�1& �2-&,%�6�1& �

Page 5: Some View on Next Generation Radio Interface - IEEE · PDF fileSome View on Next Generation Radio Interface . ... Fron t - h a u l Micro RRU BBU Pool Carrier 0 Carrier 1 Carrier N-1

������������������������� ���������������������

BBU pool

RRURRU

���� ���������������� �!!"�������"�•  #����������� �!!"�������"����� �$�%��������� �����&'()*��������(���������+#�,+-.���/����� �0������������������������� ����1*���$�

��0�2�-�2& :/,#�1& �

;�&5�2�##��#!�

��<�%�+��#�+��0�#�2�##��#�

�&+�-� ��<�%�+��#�+�����5&#��2&40#�!!�& �

���� =���)>�������� =�� ����0!� ������0!����� =���)>��=�=�=� ?� =����0!� ��@��0!�

,##� +������ =���)>�������� =� ����0!� =���0!���%�,4�+�#4�

����� ������� �� ����0!� ����0!�

In addition, CPRI has critical requirements on synchronization and latency.

������������� ���

���A2�� +�5#& +��,-�!&-,1& ��!�#�B,�#�%�+&�� ��-�� �����-�#/��!2�-��%�0-&�4� +�

Page 6: Some View on Next Generation Radio Interface - IEEE · PDF fileSome View on Next Generation Radio Interface . ... Fron t - h a u l Micro RRU BBU Pool Carrier 0 Carrier 1 Carrier N-1

Time to rethink FH for the sake of 5G evolution�

•  CPRI for 5G? Probably NOT –  Too high data bandwidth –  Scalability issue to support 5G

evolution –  Lower efficiency due to TDM

mode

•  Rethink FH –  Traffic dependent to enjoy and enable

statistical multiplexing for FH transport networks

–  Decoupling cell processing and UE processing

–  Decoupling UL and DL

–  Support key 5G technologies, e.g. LSAS, CoMP etc.

•  A new FH requires joint design from both wireless and transport perspectives

–  Function split b/w BBU and RRU

–  Careful transport network design to address the latency, jitter and in particular, synchronization requirements

•  More radically, could we relax the critical CPRI requirements (e.g. 0.002ppm sync. requirement)?

•  Initial work in SDOs –  NGMN conducted initial function

split solutions for LTE –  Newly founded project in CCSA to

study the requirements, scenarios and the key technologies

–  Discussion in ITU-T and IEEE TSN recently�

CPRI�

•••••••••1

••2

••3

Page 7: Some View on Next Generation Radio Interface - IEEE · PDF fileSome View on Next Generation Radio Interface . ... Fron t - h a u l Micro RRU BBU Pool Carrier 0 Carrier 1 Carrier N-1

Core Network�CN�

Access Gateway

Micro RRU

Macro RRU

Back-haul

Front-haul

UE

UE

Micro RRUFront-haul

BBU Pool

Carrier0

Carrier1

CarrierN-1

CarrierN

Carrier0

Carrier1

CarrierM-1

CarrierM

� �

Carrier0

Carrier1

CarrierK-1

CarrierK

Carrier0

Carrier1

CarrierL-1

CarrierL

� �

Shutdown

Shutdown

��%,2�%�C.��� %"�%+��� %�+��#�5&#��+���2&!+�

�!�!+�#�+&-�#� +���23,0�+�� 3!�+&�D����-��4�00� /���"���)�

0&&-�� %���)�

��E�#�!,00&#+�5&#�F��+�2� &-&/��!�%,��+&�+���D����-��#&,1 /�2�0���-�+��

��E�#�!,00&#+�5&#�-�9��4�/#�1& �

Expected benefits�

�0�2�+�$���G�H�� &9�#�/�$���G�H��

�0�2�+�$����G�H���G� &9�#�/�$���G�H���G

Page 8: Some View on Next Generation Radio Interface - IEEE · PDF fileSome View on Next Generation Radio Interface . ... Fron t - h a u l Micro RRU BBU Pool Carrier 0 Carrier 1 Carrier N-1

Some initial work in this front�

•  %������2���������������������������������$�%��2���-��������

–  ��������������������������������

–  $�%�%�3������� ��4�-�����������5������678�!�����

–  76((28�������"�����������'��

•  %���������������!!"���"�������������������,+-�

•  #��� ����������9�–  +�����������������!:������������

–  �����������������;�� �–  ������������� ��������������� �!!"�������"�

–  %�����������������������������

•  :$������;�� ����������������%���������<�*�%=��� ��� .�������������������������

•  �*�%������������������37�8>76�<�������9���?����������?�� ������@�

$%��

$�%�

-$�<A+-=�

�+�,���;��

#��2���

B��C�%�

��"�<�,"=�

��������������� 7>*�

����-�� �����

7>*-�

*$��

���������������

7>*-�$�%���"�<A+-=�

7$$���7>�DE�

7$$���7>�DE�

7>*�����-�� �����

�������������%�

7>*-�

7$$���7>�DE�

���������"-�

��

+;�

�;

$"D�$�������� ������!�

�;

$

+�����+��

$"�D�$�������� �����"-�

$#D�$!D�$�%D�$D%D�

$#�D�$�������� ���������

+;

���������#�������� �

-���-/'�

��������������� �

$����'�

����+�

��+

$����'�

���+�

$��'

Cell Processing�UE Processing�

Page 9: Some View on Next Generation Radio Interface - IEEE · PDF fileSome View on Next Generation Radio Interface . ... Fron t - h a u l Micro RRU BBU Pool Carrier 0 Carrier 1 Carrier N-1

%�&'��(�)#���*���*+�,&��-��(�

& 9�#+�#$�+&�#�%,2���� %"�%+����"���)�� %���)�

I  ��<�+�#4� �1& �I  �#��0#&2�!!� /�I  �"�+2�� /�� +�#5�2��I  ���0#&0&#1& �-�+&�+#�A2�-&�%�I  ��%,2��4���4,4�%�+��#�+��+&����F>���/�

�?�J��0!�+&�������0!�I  ��3���+�0&!!��-��5&#�0�23�16�%� ��<

�� %� ��<�&9�#��+��# �+�

�  �1-->�&+��#��!!,�!��#��, %�#�%�!2,!!�& ��

Filter PA

A/D D/A�

RRU

PCIe�

Accelerator�

BBU

Protocol /Service

GPP Converter�

Stand interface�

Packet Switching�

CPRI data is converted to packet

data after converter’s process�

Packet transmission b/w accelerator and converter�

%��������������������������"�

$�����2��

��+�

$��D��!����������

$����!��*�

�����������#�������������

��������

��+

����

��! �

�����

#,�#,� ������ �����������<�' '�7>*�-�������=�

",�

$��D

$����������

���+�

����������

���+

�����

���+���+

������

Page 10: Some View on Next Generation Radio Interface - IEEE · PDF fileSome View on Next Generation Radio Interface . ... Fron t - h a u l Micro RRU BBU Pool Carrier 0 Carrier 1 Carrier N-1

�'.�!,/'�� 0 ��

•  NGRI requires joint re-design from both wireless and transport perspectives

•  From wireless perspective: – BBU and RRU function split is required – A big impact on existing product form – Maintenance and future update are

also concerns •  From transport perspective

– Latency, jitter and synchronization issues on Ethernet

Page 11: Some View on Next Generation Radio Interface - IEEE · PDF fileSome View on Next Generation Radio Interface . ... Fron t - h a u l Micro RRU BBU Pool Carrier 0 Carrier 1 Carrier N-1

Thank you!�


Recommended