Basic series: Sy Interface - Data Service Flow

Shahriar Md Rajib Shahriar Md Rajib

Shahriar Md Rajib

? TM Forum Certified ? Digital BSS Transformation ? Solution Architect ? Solution Design ? API Integration ? Business Analyst ? Technical Lead ? BSS Product & Service Design

发布日期: 2023年10月24日
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Sy Interface - Data Service Flow


  1. The initiation of a data request originates from the UE to network/BTS and is directed to the PCEF (Policy and Charging Enforcement Function).
  2. PCEF maintains connections with two systems, namely PCRF and OCS. These connections are established through the Gx and Gy interfaces.
  3. Within this framework, OCS (Online Charging System) assumes responsibility for managing the data quota, while PCRF controls the user's speed. PCEF, in turn, receives user profile details from PCRF and enforces speed restrictions or provisions accordingly.
  4. To determine the appropriate speed for a particular subscriber, PCRF relies on the quota status in OCS, which is contingent upon the available data quota.
  5. OCS establishes specific rules; for instance, when the data quota balance exceeds zero, OCS will transmit counter status information to PCRF. As an example, if a customer in OCS possesses two distinct quotas, one providing high-speed access (e.g., 1 Gbps) and the other offering lower speeds (e.g., 1 Mbps or 64 Kbps), these quotas are mapped to separate SY services within PCRF. If OCS detects a quota balance greater than zero, it communicates this "normal" counter status to PCRF, signaling that the customer can browse at the associated speed.

Sunil Pandharpurkar

TMForum Active || Cisco Policy Suite PCRF || Packet Core || BSS || API Testing || Python Automation || MySQL|| Linux || Grafana || Diameter || Database || Linux || Mentor || Ex HCLTech

12 个月

Hi Rajib , I am also working in same domain. Thank you for sharing.I am now looking for new opportunities in BSS Testing (PCRF and OCS) kindly consider my profile .

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