2GHz TD-SCDMA digital cellular mobile telecommunication network - Technical requirements of Ir interface
1 Scope
This standard specifies the functional requirements, performance requirements, interface physical layer, application layer C&M process and other technical requirements of Ir interface in radio access network (RAN) equipment of 2GHz TD-SCDMA digital cellular mobile communication network.
This standard is applicable to the Ir interface part of distributed base stations of 2GHz TD-SCDMA digital cellular mobile communication network.
2 Normative references
The following standards contain provisions which, through reference in this standard, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections) to, or revisions of, any of these publications do not apply. However parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent edition of the normative documents indicated below. For undated references, the latest edition of the normative document applies.
YD/T 1365-2006 Technical requirements for RAN equipment of 2GHz TD-SCDMA digital cellular mobile communication network
3 Abbreviations
For the purposes of this standard, the following abbreviations apply.
AxC Antenna Carrier
BBU Base Band Unit
CN Core Network
C&M Control and management
Ib Interface between the BBUs
IE Information Element
Ir Interface between the RRU and the BBU
Iu Interface between the UTRAN and the CN
Iub Interface between the BBU and the RNC
Iur Interface between the RNC and the RNC
RNC Radio Network Controller
RRU Remote RF Unit
UE User Equipment
UTRAN Universal Terrestrial Radio Access Network
TD-SCDMA Time Division-Synchronization code Division Multiple Access
LOP Lost of power
LOS Lost of signal
LOF Lost of frame
4 General
The location of TD-SCDMA base station equipment (NodeB) in the network is shown in Figure 1.
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Figure 1 Location of NodeB in TD-SCDMA network
TD-SCDMA base station equipment (NodeB) in this standard is distributed base station equipment, which is composed of base band unit (BBU) and remote RF unit (RRU), and is a kind of base station combination that can be flexibly distributed, as shown in Figure 2. The RRU is connected with the base band unit (BBU) through Ir interface, and the BBU is connected with the RNC through Iub interface. The BBUs may be interconnected through Ib interface (optional).
Figure 2 Schematic diagram for distributed base station equipment
The basic network structure supported by Ir protocol is shown in Figure 3. A BBU and a RRU are connected by a pair of optical fibers. In order to meet the requirements of system expansion and network structure diversity, Ir protocol may extend the following connection methods:
➢ Star connection: Multiple RRUs serve the same BBU, as shown in Figure 4.
➢ Chain connection and ring connection support interconnection among multiple RRUs, as shown in Figures 5 and 6 respectively.
Foreword II
1 Scope
2 Normative references
3 Abbreviations
4 General
5 Functional requirements of Ir interface
6 Performance requirements of Ir interface
7 Physical layer of Ir interface
8 Starting process
9 Application layer C&M process
Annex A (Normative) Delay measurement principle
Annex B (Normative) Alarm table
Annex C (Normative) Message number
Annex D (Informative) MAC address allocation method
2GHz TD-SCDMA digital cellular mobile telecommunication network - Technical requirements of Ir interface
1 Scope
This standard specifies the functional requirements, performance requirements, interface physical layer, application layer C&M process and other technical requirements of Ir interface in radio access network (RAN) equipment of 2GHz TD-SCDMA digital cellular mobile communication network.
This standard is applicable to the Ir interface part of distributed base stations of 2GHz TD-SCDMA digital cellular mobile communication network.
2 Normative references
The following standards contain provisions which, through reference in this standard, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections) to, or revisions of, any of these publications do not apply. However parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent edition of the normative documents indicated below. For undated references, the latest edition of the normative document applies.
YD/T 1365-2006 Technical requirements for RAN equipment of 2GHz TD-SCDMA digital cellular mobile communication network
3 Abbreviations
For the purposes of this standard, the following abbreviations apply.
AxC Antenna Carrier
BBU Base Band Unit
CN Core Network
C&M Control and management
Ib Interface between the BBUs
IE Information Element
Ir Interface between the RRU and the BBU
Iu Interface between the UTRAN and the CN
Iub Interface between the BBU and the RNC
Iur Interface between the RNC and the RNC
RNC Radio Network Controller
RRU Remote RF Unit
UE User Equipment
UTRAN Universal Terrestrial Radio Access Network
TD-SCDMA Time Division-Synchronization code Division Multiple Access
LOP Lost of power
LOS Lost of signal
LOF Lost of frame
4 General
The location of TD-SCDMA base station equipment (NodeB) in the network is shown in Figure 1.
.....
.....
Figure 1 Location of NodeB in TD-SCDMA network
TD-SCDMA base station equipment (NodeB) in this standard is distributed base station equipment, which is composed of base band unit (BBU) and remote RF unit (RRU), and is a kind of base station combination that can be flexibly distributed, as shown in Figure 2. The RRU is connected with the base band unit (BBU) through Ir interface, and the BBU is connected with the RNC through Iub interface. The BBUs may be interconnected through Ib interface (optional).
Figure 2 Schematic diagram for distributed base station equipment
The basic network structure supported by Ir protocol is shown in Figure 3. A BBU and a RRU are connected by a pair of optical fibers. In order to meet the requirements of system expansion and network structure diversity, Ir protocol may extend the following connection methods:
➢ Star connection: Multiple RRUs serve the same BBU, as shown in Figure 4.
➢ Chain connection and ring connection support interconnection among multiple RRUs, as shown in Figures 5 and 6 respectively.
Contents of YD/T 1855-2009
Foreword II
1 Scope
2 Normative references
3 Abbreviations
4 General
5 Functional requirements of Ir interface
6 Performance requirements of Ir interface
7 Physical layer of Ir interface
8 Starting process
9 Application layer C&M process
Annex A (Normative) Delay measurement principle
Annex B (Normative) Alarm table
Annex C (Normative) Message number
Annex D (Informative) MAC address allocation method
