Semi-Persistent Scheduling (SPS, semi-persistent scheduling)
eNB uses the TTI in an SPS resource (SPS C-RNTI scrambled PDCCH) specifies a radio resource used by the UE, after a period of not over, the UE can use to send and receive data SPS resource, the eNB no longer subframes ( hair called SPS PDCCH sub-frame) to specify the allocation of resources under
Position in architecture
An eNB to UE method of allocation of resources.
In parallel with the dynamic scheduling, it applies to different scenarios
Feature
"Primary distribution, use many times"
ENB does not need to make use of the SPS in each TTI are issued under DCI UE (DCI includes uplink or downlink), thereby reducing the overhead of a corresponding PDCCH
The difference between dynamic scheduling
Dynamic scheduling, a radio resource needs to allocated (designated by PDCCH) to the UE in each TTI
SPS and semi-static configuration allows the radio resources, and the resources are periodically allocated to a particular UE.
typical application
Voice over IP-based (English: Voice over Internet Protocol, abbreviated as VoIP) is a voice call technology, to achieve a voice call and multimedia conferencing via Internet Protocol (IP), that is, via the Internet to communicate.
SPS data packet size substantially constant and periodically useful services, such as VoIP. timing and radio resources required for this kind of business is predictable.
Reference: https://wenku.baidu.com/view/1bf670c20066f5335b81211e.html
