Thursday, 18 August 2016

Platinum User Prioritizing Feature

 Introduction
 If network congestion occurs during, for example, large gatherings, sports events, or festivals, it can become difficult for users to access the network. With the Platinum User Prioritizing feature, the RNC preferentially improves experience of platinum users.

 Benefits 
This feature provides the following benefits:
 l. When network congestion occurs, platinum users preferentially access the network. This enables platinum users to have a higher radio resource control (RRC) connection setup success rate and radio access bearer (RAB) setup success rate than common users. 
2. This feature is applied when network access fails due to insufficiency of the following resources: – Power resources – Credit resources – Code resources – Iub transmission resources

NOTE This feature cannot increase the network access rate if the RRC connection setup and RAB setup failures are caused by insufficient capacity licenses. 


3. When downlink coverage is weak, this feature allows NodeBs to increase the maximum downlink transmit power for platinum users' conversational services, thereby increasing their mean opinion scores (MOSs).
4. When network congestion occurs, this feature restricts data transmission of common PS users to reduce cell load and interference, thereby improving user experience and the call drop rate of platinum users. 
5. Platinum users can have higher throughput than common users because the configured SPI weight of platinum users is higher. For details about SPI weight, see Differentiated HSPA Service Feature Parameter Description.
 Architecture 
The Platinum User Prioritizing feature works as follows during a service procedure: 






 The Platinum User Prioritizing feature works as follows during a service procedure: 

1. The RNC identifies platinum users and maintains the IMSI-to-TMSI mapping table. The operator configures platinum users' IMSIs by running the ADD UPLATINUMIMSI command. The RNC maintains the IMSI-to-TMSI mapping table for platinum users based on the RRC Connection Request, Common ID, and Non-Access Stratum (NAS) messages. Upon receiving an RRC Connection Request message, if the message contains the IMSI or TMSI, the RNC searches the IMSI-to-TMSI mapping table. If the RNC finds the IMSI or TMSI in the table, it identifies the user as platinum. If the message contains the P-TMSI, the RNC identifies the user as non-platinum.
 

NOTE IMSI stands for international mobile subscriber identity. TMSI stands for temporary mobile subscriber identity. P-TMSI stands for packet temporary mobile subscriber identity. For details about how to identify platinum users, see 3 Identification and Maintenance of Platinum Users. 

 2. Paging for platinum users is preferentially processed. When paging channels are congested, paging messages for platinum users can preempt paging channels, thereby improving the CS and PS paging success rate of platinum users.
 3. The RNC allows platinum users to preferentially establish RRC connections during the RRC connection setup phase. During the flow control of RRC connection setup, the RNC raises all services for platinum users to the same priority as conversational services, which have the highest priority among all services except emergency calls. During the RRC connection setup phase, platinum users can unconditionally preempt the resources for non-platinum users. The purpose is to increase the RRC connection setup success rate of platinum users. 
4. The RNC allows platinum users to preferentially establish RAB connections during the RAB setup phase. During the RAB setup phase, platinum users can unconditionally preempt the resources for non-platinum users. The purpose is to increase the RAB setup success rate of platinum users. 
5. The Platinum User Prioritizing feature takes the following measures to improve the service experience of platinum users during the service processing phase. 
– QoE guarantee for platinum users - Basic QoE guarantee for platinum users NodeBs increase the maximum downlink transmit power for platinum users' conversational services. This improves the voice quality of platinum users in weak downlink coverage areas. The initial SPI weight of platinum users is fixed to 100%. If different SPI weights are configured, platinum users are preferentially scheduled so that they can obtain the required resources. If the SPI weight of some non-platinum users (for example, gold users) is also set to 100%, platinum and non-platinum users have the same scheduling priority. - Enhanced QoE guarantee for platinum CS users This feature restricts data transmission of common PS users in platinum CS cells to reduce cell load and interference, thereby improving experience of platinum users.
 – State transition policies for platinum users State transition policies can be specified for platinum users by the users' IMSIs to meet different state transition requirements.
 

Budi Prasetyo

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