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LteWorld Forum

Discuss any 4G LTE related topic.

lawful interception in lte

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Please anyone can tell me what is lawful interception and mobility anchoring of SGW ....

stratégie de migration du réseau CDMA200O 1X EV-DO REV A vers la LTE

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Bonjour,
je dois écrire mon mémoire de master qui porte sur la migration du réseau CDMA2000 1X EV-DO REVA vers la LTEi. Je suis sur la partie stratégie de migration et j'y rencontre d'énormes problémes. Je vous serais trés reconnaissante si vous pourriez me donner un petit coup de pouce.
Cordilament.

What are the parameter can be reconfigured at run time at eNodeB?

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Hi,

Please let me know what are the parameters can be modified at LTEi eNodeBi at run time?

LATENCY IN COOPERATIVE COMMUNICATION

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I want to simulate & calculate delay in n-nodes network in which nodes are randomly distributed but for simplicity their distance are known.

I want to calculate the time (Latency) in this whole scenario. i.e Propagation delay as well as relaying delay in case of Cooperation be a nearby node.

EPS security context is invalid?

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In TS24.301 P32(4.4.2.1), it said:

The UEi shall mark the EPSi security context on the USIMi or in the non-volatile memory as invalid when the UE initiates an attach procedure as described in subclause 5.5.1 or when the UE leaves state EMM-DEREGISTERED for any other state except EMM-NULL.

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lte software

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hello,

i do master work and my theme is some system aspects of lte implementation on 450 Mhz. so i need help with software. beside, i have to compare it on 450 mhz and on 3 Ghz.. so does anybody know some software for lte that could be useful ? :D

Its like network planning.

[TS 36.331 v9.10.0] what does "reportCGI" means?

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5.5.2.1 General
E-UTRANi applies the procedure as follows:
- to ensure that, whenever the UEi has a measConfig, it includes a measObject for the serving frequency;
- to configure at most one measurement identity using a reporting configuration with the purpose set to 'reportCGI';

I cannot understand what reportCGI means. Could somebody tell me?
Thank you~

How many Capacity booster cells (micro/pico/femto) can be under the control of an Umbrella cell (macro) via X2 interface?

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To increase the capacity requirements in the given area, normally capacity booster cells have been installed with limited coverage like (micro/ pico/femto) cells.
With respect to the energy saving features of LTEi, these capacity booster cells can be switched off during low traffic periods and switch-on by demand of traffic. These are communicating through X2i interface.

blacklisted cell

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Can anybody tell me what is a blacklisted cell?

Voice over LTE

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Hello,
I just want to understand a basic difference between Voice over IMS and Voice over LTEi.
Thanks,
Sarma

query on ISR (idle mode signalling reduction)

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TS 23.401 says that "MMEi/SGSN activate ISR after determining SGW's support for ISR. How MME/SGSN determine SGW's support for ISR is implementation dependent."

How is this usually done ? Is there a command at MME/SGSN that can be configured to denote that a particular SGW supports ISR. ?

Thanks in advance.

can the LTE-A Component carriers belongs to separate eNodeBs

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Hello all,

I cannot find in 3GPPi R10 and beyond specs clearly says that CCs must be from the same eNodeBi.

can somebody please confirm whether this is the case, if so which specs state this.

In R10 and beyond, will a single MACi entity will perform the scheduling functionality across cells under same eNodeB.

kind regards
Sira

Resource Block & Physical Resource Block in LTE

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Resource Block

OPNET simulation with LTE

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Hi,
I am new in OPNET and want to use it for LTEi network simulation. I want to write a function in the function block (FB, more specifically, in lte_ue_as.function block) that will allow me to find out an eNodeBi for each UEi. Does anyone know how can I find the following information:

1. How to find out the eNodeB's that can cover/ provide service to the current UE?