5G无线技术及部署练习题附答案
Chapter 1
Exercise after class
1.Multiple choice ns
大花石上莲
超市手推车广告1) In the ork architecture of 5G mobile n system。the device of wireless access ork is (C).
A。BTS
B。BSC
C。XXX
D。XXX
2) When divided from the physical layer。the 5G bearer ork is divided into (ABD).
3) In order to meet the needs of low latency services。part of the ork in the core ork needs to be sunk into (D).
4) The global 3G standard includes (ABCD).
5) XXX used by 4G is (D).
2.Short answer ns
1) Please write down the eight ability goals of 5G defined by ITU.
2) Please describe the three major n s of 5G.
The n s of 5G are divided into three categories: enhanced mobile broadband (eMBB)。ultra-reliable and low-XXX (URLLC)。and massive machine-type n (mMTC)。Different XXX。peak rate。latency。and n density are key XXX。the XXX rate。The peak rate of 5G is 100 times higher than that of LTE。reaching 10Gbit/s。In the URLLC。the XXX。The air interface latency of 5G is ced from 50ms of LTE to 1ms。In the mMTC。the focus
is mainly on n density。The number of ns per square kilometer of 5G is increased from 104 of LTE to 106.
Chapter 2
1) The orking methods that can be used for 5G XXX (D).
A。XXX
B。CRAN
C。Cloud RAN
D。All of the above
2) XXX (D).
继电器延时电路
A。XXX.
B。BBU and RF unit are XXX。and the XXX.
有机玻璃加工
设备C。If there are power supply and n problems in a single site。it will not affect other sites.D。It can realize inter-XXX cross-site baseband pool。making resource XXX.
3) XXX (C).
A。XXX of the front haul interface is large.
C。The resources een sites are independent。which is not XXX.
4) The DU module of 5G base n does not include (A).
A。PDCP layer
家用玉米脱粒机
B。CU
EMSKDB．RLC层
C．MAC层
D．物理层
E．Cloud RAN架构的移动云引擎中至少包含（A）网元功能。 Cloud RAN架构是一种新型的无线网络架构，它将传统的设备分为两部分：BBU和RRH。BBU集中在单个机房中，而RRH则分布在不同的地理位置。这种架构的优点是可以降低的能耗和维护成本，同时提高网络的灵活性和可扩展性。但是，这种架构也存在一些挑战，例如要求集中机房具备足够的设备安装空间，同时需要解决BBU之间的互连问题。
1）若采用CRAN组网，且BBU之间互连，则该方案的优点是可以提高网络的灵活性和可扩展性，同时降低的能耗和维护成本。缺点是需要解决BBU之间的互连问题，同时要求集中机房具备足够的设备安装空间。
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