How to Plan MAIO and HSN – Download as Word Doc .doc), PDF File .pdf), Text File .txt) 8 OMO BSC GSM V9R11R12R13 Frequency Hopping. A mobile allocation index offset (MAIO) refers a time delay separating traffic channels. When a Thus, the MA Table, MAIO and the Hopping Sequence Number (HSN) completely configure a hopping sequence procedure GSM standard. View Test Prep – Frequency hopping from ECE at D A V College Cheeka. What is HSN and MAIO in GSM? – + February S M T W T F.
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This gives some flexibility to RF Planner to have irregular configuration on each site. Erlang functions for Microsoft Excel.
Hopping Issue (HSN and MAIO patterns)
The benefits of hopping increase if more frequencies are available for hopping. Frequency Hopping What is Frequency Hopping? It did not help? Churchgate BPL Kaio 3. FHI hns be defined on a timeslot basis. They transmit dummy burst when BCCH frequency is not in the burst. The HSNs 1 — 63 are pseudo random sequences used in the random hopping while the HSN 0 is reserved for a sequential sequence used in the cyclic hopping.
Telecom Concepts: Frequency Hoping in GSM
It is then possible to define 4 different FHIs for 16 timeslots. This parameter is a deciding factor for number of carriers that can be equipped on a sector or a site. The HSN is a cell specific parameter.
Set 1 is used preferably in sector V1 and so on. RCU failures after switchover to hopping.
Mobile Allocation Index Offset
HSN allocation to the cells is done in random fashion. Set of frequencies the mobile is allowed to hop over. So there is no option to use 32 in hopping otherwise maoo will be underutilised. The advantage of this scheme is it provides better isolation between sites using same hopping frequencies. Rate this Content 4.
Separate BCCH plan is required to be made for that period. Hopping sequence number T1: Enable combined and non-combined multiframe. Motorola system allows iin define the hopping system on a per timeslot basis.
In our example, the MA List is small – just three frequencies. The hopping sequence determines the order in which the frequencies in the MA-list are to be used.
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Monitoring Customer Complaints c. This increase in reuse is definitely going to degrade BCCH carrier quality as compared to present situation. Powered by Create your own unique website with customizable templates.
This article provides insufficient context for those unfamiliar with the subject. After implementation of SFH, following few repeater sites were visited to check for the coverage.
MA list is different for the cells — In this case HSN planning is not important, as there can not be any hits between these cells. Unsourced material may be challenged and removed.
This is very useful for interference averaging and to randomize the distribution of errors. The frequencies in the MA-list are required to be in increasing order because of the type of signaling used to transfer the MA-list.
There always exists a trade-off between BCCH and hopping plans. This is because the network is not synchronized so if there is any one hit it will result in continuous sequence of hits. Drive test tools that display decoded layer 3 information are used for monitoring frequency hopping networks. Implementation of hopping plan on trial basis in Vashi BSC 7.