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1、Energy Impact of Emerging Energy Impact of Emerging Energy Impact of Emerging Energy Impact of Emerging MobileMobileMobileMobileInternet Internet Internet Internet Applications on LTE Networks:Applications on LTE Networks:Applications on LTE Networks:Applications on LTE Networks:Issues and Solutions
2、Issues and SolutionsIssues and SolutionsIssues and SolutionsMarutiGupta,SatishC.Jha,AliT.Koc,andRathVannithamby,IntelMarutiGupta,SatishC.Jha,AliT.Koc,andRathVannithamby,IntelCorporationCorporationExisting LTE Power Management Existing LTE Power Management MechanismsMechanismsAbstractAbstractIntroduc
3、tionIntroduction1 12 23 3Potential Air Interface Solutions to Potential Air Interface Solutions to Save Device PowerSave Device Power4 4Solutions Adopted in 3GPP R 11Solutions Adopted in 3GPP R 115 5Potential Research Directions and Potential Research Directions and Solution ApproachesSolution Appro
4、aches6 6AbstractImpactAbstractApplications Mobile Internet applications run on devices such as smartphones and tables Newer applications Impact on LTE device power and air interface signaling A survey of solutions Potential future research directions. Traditional applications. Newer applicationsIntr
5、oduction Newer Newerapplications applications TraditionalTraditionalA ApplicationspplicationsBattery Battery LifetimeLifetime distinct Active and distinct Active and Inactive sessionsInactive sessionsFacebookFacebookHTTPHTTP web browsers web browsers and FTPand FTPDistinct Active and Distinct Active
6、 and Inactive sessionsInactive sessionseriodExisting LTE Power Management Mechanisms in 3GPP R 8、9and10Device OFF De-RegisteredRRC ConnectedRRC IdlePower upRegisteredPacket activityincoming or outgoingNo packet activityfor long periodRegistrationDe-RegistrationExisting LTE Power Management Mechanism
7、s in 3GPP R 8、9and10ppFast DormancyFast Dormancy（快速休眠）（快速休眠） Without Without waiting for the RRC Inactivity Timer waiting for the RRC Inactivity Timer ppDiscontinuous Reception Discontinuous Reception (DRX) (DRX) DRX DRX is triggered when a parameter known is triggered when a parameter known as DRX
8、as DRX Inactivity Timer expiresInactivity Timer expiresPotential Air Interface solutions to Save Device Power1234Always Connected with DRXFast Transition to Idle Adaptive DRX SwitchingLow-overhead Connected StatePotential Air Interface solutions to Save Device PowerAlways Connected with DRX a. UE st
9、ays in Connected all the time b. Eliminating the signaling overhead of state transitions from Connected to IdleFast Transition to Idle a. UE indicates its desire to go to Idle state to the network b. The network sends the UE to Idle state without waiting for the RRC Inactivity Timer. c. A prohibit t
10、imer and an upper limit on the numberComparison a. Low background traffic activity and high mobility b. Low mobility and low traffic activitySolutions Adopted in 3GPP R 11 Power Preference Indication (PPI) PPI can be an enabling basis to implement efficient DRX switching PPI may also assist the netw
11、ork in Fast Transition to Idle,Potential Research Directions and Solution ApproachesThe UE Assistance mechanismMultiple bits of PPI may need to be incorporated in future 3GPP releases so that UE can better inform the network.There will also be a focus on active traffic such as gaming and HTTP-based streaming. Thank You Lv xin
