WO2013172648A1 - Procédé et système pour mettre en tampon des données de base dans un équipement utilisateur (ue) - Google Patents

Procédé et système pour mettre en tampon des données de base dans un équipement utilisateur (ue) Download PDF

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Publication number
WO2013172648A1
WO2013172648A1 PCT/KR2013/004295 KR2013004295W WO2013172648A1 WO 2013172648 A1 WO2013172648 A1 WO 2013172648A1 KR 2013004295 W KR2013004295 W KR 2013004295W WO 2013172648 A1 WO2013172648 A1 WO 2013172648A1
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WIPO (PCT)
Prior art keywords
background data
network
parameter
buffer
buffered
Prior art date
Application number
PCT/KR2013/004295
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English (en)
Inventor
Satish Nanjunda Swamy Jamadagni
Nitin Jain
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Samsung Electronics Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Samsung Electronics Co., Ltd. filed Critical Samsung Electronics Co., Ltd.
Publication of WO2013172648A1 publication Critical patent/WO2013172648A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/10—Flow control between communication endpoints
    • H04W28/14—Flow control between communication endpoints using intermediate storage

Definitions

  • the present invention relates to background data or low priority data in a User Equipment (UE) and more particularly relates to handling background data by buffering background data based on the parameters.
  • UE User Equipment
  • Background data refers to the autonomous exchange of user plane data packets between User Equipment (UE) and the network.
  • UE User Equipment
  • Such packets are due to open applications and keep alive messages which require communication on an intermittent basis.
  • Such traffic is generally low in volume (approximately 5 Bytes/s to 250 Bytes/s) and may be widely dispersed in time.
  • RRC state control may be based on inactivity timers within the network (eNB) and depending on the configured values, for shorter timer values, the frequency of RRC state transitions can become high resulting in high Uu and S1 signaling overheads. For longer timer values, the background traffic tends to keep the UE in an RRC connected state. It has also been observed that the cost of mobility in RRC connected state is higher than the cost of mobility in RRC Idle State. The UE-controlled mobility applies only in idle mode, then from the point of view of mobility signaling alone; it is desirable to place the UE in RRC Idle State as much as possible. However, frequent transitions between RRC idle and connected states are also undesirable.
  • DRX Full connected Discontinuous Reception
  • the allocations are decided per UE level based on the buffered data.
  • the scheduler maintains fairness across Radio Bearers (RB) and the applications is subject to implementation. It cannot be ensured that the applications that are mapped to an RB in the UE are served well by multitude of scheduler implementations.
  • RB Radio Bearers
  • QCI Quality of Service
  • MAC Medium Access Control
  • the principal object of the embodiments herein is to provide a method and system to buffer background data at the User Equipment (UE) based on the parameter send by a network.
  • UE User Equipment
  • Another object of the invention is to provide a method to isolate non-background data and background data to buffer.
  • Another object of the invention is to provide UE application based Quality of Experience (QoE) feedback to the scheduler to correct data rates for that Radio Bearer.
  • QoE Quality of Experience
  • the invention provides a method for handling background data in a User Equipment (UE) by the network, wherein the method comprises receiving an indication with at least one parameter to buffer said background data by said UE from said network. The method further comprises sending the buffered background data to the network by the UE when at least one parameter is satisfied.
  • UE User Equipment
  • the invention provides a network for handling background data in a User Equipment (UE), wherein the network is configured to indicate the UE to buffer the background data based on at least one parameter.
  • UE User Equipment
  • the invention provides a User Equipment (UE) for handling background data, wherein the UE comprises an integrated circuit. Further the integrated circuit comprises at least one processor and at least one memory. The memory comprises a computer program code within the circuit. At least one memory and the computer program code with at least one processor cause the UE to receive an indication with at least one parameter to buffer the background data from a network. The UE is further configured to send the buffered background data to the network when at least one parameter is satisfied.
  • UE User Equipment
  • FIG. 1 illustrates an overview of the typical wireless cellular network
  • FIG. 2 illustrates a flow diagram explaining the process of sending indication to User Equipment (UE) to buffer background data by the network, according to embodiments as disclosed herein;
  • UE User Equipment
  • FIG. 3 illustrates the flow diagram explaining the process buffering background data by the UE, according to embodiments as disclosed herein;
  • FIG. 4 illustrates the flow diagram explaining the process of sending Quality of Experience (QoE) to the network, according to embodiments as disclosed herein;
  • FIGs. 5a and 5b illustrate the overview of the Scheduling Feedback Reporting (SFR) message for grouping the background data, according to embodiments as disclosed herein.
  • SFR Scheduling Feedback Reporting
  • the embodiments herein achieve a method and system for handling background data in a User Equipment (UE) by the network.
  • the proposed method decides to buffer background data based on load in the network. Further the network sends an indication to the UE to buffer the background data based on one or more parameters. Further the UE isolates the background data from the non-background data to buffer and send the buffered background data to the network when one or more parameters are satisfied.
  • the proposed method shapes the background traffic in the UE.
  • the proposed method shapes the background traffic.
  • By shaping the background traffic there can be a predictable behavior from UEs and this will help in setting appropriate DRX values and achieve network optimization. This can also help in mitigating network load due to background traffic.
  • Optimal DRX parameters also help in battery saving on the UE side.
  • LTE organizes the different types of traffic flows into logical traffic pipes named bearer services.
  • bearer services Each bearer service has certain QoS attributes associated with it, depending on the type of traffic it carries.
  • traffic bearers are categorized into four QoS classes based on the QoS constraints of the bearer's traffic: Conversational class, Streaming class, Interactive class, Background class.
  • Logical Channel Group is defined as a group of Radio bearers (RBs) that exhibit similar QoS characteristics.
  • the MAC header may consist of multiple sub-headers. Each sub-header corresponds to a MAC control element, a MAC SDU, or padding and provides more information of the respective field in terms of the content and length.
  • MAC SDUs can belong to different logical channels (indicated by the logical channel identifier (LCID) field in the sub header) is possible.
  • BSR Buffer Status Reporting
  • the UE is used by the UE to communicate its buffer information to the network.
  • BSR mechanism plays an important role in the uplink scheduler's QoS provisioning where the scheduler gets a status report on how much data await transmission at the UE's uplink buffer.
  • the parameter can be volume of the background data, time to send the buffered background data and latency to send the buffered background data or the like.
  • the User Equipment can be a mobile phone, a smart phone, a Personal Digital Assistant (PDA), tablet or the like.
  • PDA Personal Digital Assistant
  • the network referred herein in the description refers to wireless cellular network.
  • FIGS. 1 through 5b where similar reference characters denote corresponding features consistently throughout the figures, there are shown preferred embodiments.
  • FIG. 1 illustrates an overview of the typical wireless cellular network.
  • the figure depicts plurality of User Equipments (UEs) such as UE 100a, UE 100b, UE 100c, UE 100d, UE 100e and UE 100f.
  • the plurality of UEs is connected to a network (eNb) 101.
  • the UEs and eNB 101 comprises several layers in their protocol stack such as PHY (physical) layer forms the layer 1, and layer 2 comprises MAC (Medium Access Control) layer, Radio Link Control. (RLC) Layer and PDCP (Packet Data Convergence Protocol) layer.
  • the UE 100a is installed with multiple applications which includes but not limited to weather update, news update, mail sync, social networking update.
  • RRC Radio Resource Control
  • Discontinuous Reception (DRX) pattern sent by the network informs UE about when to start transmitting packets to the network. So, every UE connected to the network has to utilize the set DRX pattern received by the network to send/receive data. It is observed that very high percentage of background data originating from open applications are non critical in nature.
  • FIG. 2 illustrates a flow diagram explaining the process of sending indication to User Equipment (UE) to buffer background data by the network, according to embodiments as disclosed herein.
  • UE User Equipment
  • FIG. 2 illustrates a flow diagram explaining the process of sending indication to User Equipment (UE) to buffer background data by the network, according to embodiments as disclosed herein.
  • the network 101 indicates (201) the UEs to start buffering background data. This decision is based on the load in the network.
  • the network 101 sends an indication to buffer background data along with one or more parameters.
  • the network 101 parameters includes but not limited to the volume of buffered background data, time to send buffered background data or both to the UE in the indication.
  • the indication is sent to the UEs in a dedicated message or in a System Information Block (SIB) message.
  • SIB System Information Block
  • the network 101 indicates to the UE when to start and stop buffering background data through an RRC message or through MAC level indication (MAC CE).
  • MAC CE MAC level indication
  • the network 101 receives (202) the acknowledgement for buffering the background data from the UEs which accepts the network indication to buffer the background data.
  • the network 101 configures the DRX setting for all UEs connected to the network to send the buffered background data.
  • the network After receiving the acknowledgement from the UEs the network prepares (203) resource allocation for the UEs to transmit the buffered background data.
  • resource allocation for the UEs to transmit the buffered background data.
  • Such resources may be allocated in real time or they may be semi statically fixed.
  • the network 101 can also buffer data to send to the UEs.
  • the network sends the buffering requirements for background traffic to the UEs.
  • the proposed method introduces a new “relaxed QCI class”.
  • the new QCI with a relaxed latency requirement can be for example 5 to 10 seconds.
  • GBR Guaranteed Bit Rate
  • non-GBR non Guaranteed Bit Rate
  • LCG Logical Channel Group
  • the network 101 specifies the LCG in the RRC reconfiguration message.
  • FIG. 3 illustrates the flow diagram explaining the process buffering background data by the UE, according to embodiments as disclosed herein.
  • initially UE receives (301) an indication from the network to buffer background data.
  • the UE based on the Inter Arrival Statistics (IAS) isolates the background data.
  • IAS Inter Arrival Statistics
  • TCP Transmission Control Protocol
  • the UE isolates the background data as described below:
  • the background data from different ports could be isolated and buffered.
  • the UE buffer the background data at the PDCP level of the protocol stack.
  • the UE buffer the background data at the MAC level or at the RLC level or in combination of MAC and RLC.
  • the treatment behavior for each port when they are sending actual application data and when they are handling background could be specified differently.
  • the network 101 could specify the time based treatment or volume based treatment of an application based on whether they are sending the actual data or background data in the Traffic Flow Templates (TFTs) that are sent to the UEs.
  • TFTs Traffic Flow Templates
  • packet filtering can be used to isolate the background data so that such data could be buffered. Packet filtering into different bearers is based on Traffic Flow Templates (TFTs).
  • TFTs Traffic Flow Templates
  • the TFTs use IP header information such as source and destination IP addresses and TCP port numbers to filter packets such as VoIP from web browsing traffic so that each can be sent down the respective bearers with appropriate QoS.
  • An UpLink TFT (UL TFT) associated with each bearer in the UE filters IP packets to EPS bearers in the uplink direction.
  • a DownLink TFT (DL TFT) in the P-GW (PDN Gateway) is a similar set of downlink packet filters.
  • the TFT filter could filter the background data based on the IAS.
  • the network 101 could instruct the UE to buffer based on the IAS or some statistics of the inter arrival rate of the packets. The Inter Arrival Statistics characteristics could be specified by the network 101 for buffering.
  • the UE buffers (303) the background data. Further the UE checks (304) whether the volume or time specified to send the buffered background data criteria is satisfied. If the criteria are not satisfied, then the UE again buffer the background data. If the criteria are satisfied, then the UE sends (305) the buffered background data to the network 101.
  • the various actions in flow diagram 300 may be performed in the order presented, in a different order or simultaneously. Further, in some embodiments, some actions listed in FIG. 3 may be omitted.
  • FIG. 4 illustrates the flow diagram explaining the process of sending Quality of Experience (QoE) to the network, according to embodiments as disclosed herein.
  • QoE Quality of Experience
  • the background data are shaped at the network101
  • QoE Quality of Experience
  • the UE determines (401) the QoE of the applications based on pre-defined applicable parameters and thresholds.
  • the application QoE calculation involves averaging the experience factor for some time in order to avoid any false triggers.
  • the UE compares (402) the determined QoE against pre-defined thresholds.
  • the UE passes (403) the indication to the MAC layer.
  • the cumulative or individual collection of QoE parameters from different applications will be provided to the MAC layer.
  • This indication can be in the form of a bit indication or can be in any other format.
  • the UE can then indicate the QoE indicator to the network 101 in a MAC message.
  • the QoE indication can be on a per LCG basis or generically for the UE.
  • the MAC upon receiving the QoE trigger or indicator from the application, the MAC will form a Scheduling Feedback Report (SFR) message.
  • This SFR message structure could be of fixed size with defined group e.g. logical channel group of the applications or variable size with information either from active LCG or logical channel level.
  • the MAC layer in the UE checks (404) whether the trigger condition is satisfied for SFR reporting. If the trigger condition is not satisfied, then again the UE pass the indication to the MAC layer. If the trigger condition is satisfied, then the MAC layer builds (405) the SFR which could be any MAC message and then transmits (406) the SFR to the network 101.
  • the QOE based scheduling feedback information received at network 101 scheduler is applied in a closed loop fashion to suitably moderate the scheduled allocations. “No satisfaction” feedback would tend to increase the scheduling allocations for respective UE(s) and/or application(s). It should be possible to average out or consider N consecutive feedbacks before to derive corrective actions. Further, it can be applied in conjunction with other factors e.g. existing channel conditions or the like.
  • the various actions in flow diagram 400 may be performed in the order presented, in a different order or simultaneously. Further, in some embodiments, some actions listed in FIG. 4 may be omitted.
  • FIGs. 5a and 5b illustrate the overview of the Scheduling Feedback Reporting (SFR) message for grouping the background data, according to embodiments as disclosed herein.
  • the figure shows the SFR structure for a LCG group ID. This SFR is accumulated together for the UE or indicated individually e.g. as a bitmap to indicate “satisfaction” or “no satisfaction”.
  • FIG. 5b depicts the SFR structure for multiple LCGs.
  • the SFR can be placed in the header field in a MAC PDU utilizing reserved or unused field/bits or conveyed with extended or new field/bits.
  • the QoE indicator When the application constructs the QoE indicator one or more QoE parameters can be considered.
  • the QoE parameters includes but not limited to Distortion as in video or audio streaming, Lip-sync loss, jitter, buffering delay, buffer overflows, play out delays or the like.
  • the embodiments disclosed herein can be implemented through at least one software program running on at least one hardware device and performing network management functions to control the elements.
  • the elements shown in Figs. 1 include blocks which can be at least one of a hardware device, or a combination of hardware device and software module.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé et un système pour traiter des données de base dans l'équipement utilisateur (UE). Le procédé décide de mettre en tampon les données de base sur la base d'une charge sur le réseau. Le réseau envoie une indication à l'UE de mettre en tampon les données de base sur la base d'un ou plusieurs paramètres. L'UE isole les données de base des données non de base pour mettre en tampon et envoyer les données de base mises en tampon au réseau quand un ou plusieurs paramètres sont satisfaits. Le procédé proposé forme le trafic de base dans l'UE. Trois mécanismes explicites sont proposés pour une spécification de l'exigence de mise en tampon qui sont la spécification d'un QCI relaxé, la spécification d'un groupe de canal logique (LCG) spécifique de données de base et sur la base d'un ordre de réseau explicite sur le moment et un type de trafic à mettre en tampon.
PCT/KR2013/004295 2012-05-15 2013-05-15 Procédé et système pour mettre en tampon des données de base dans un équipement utilisateur (ue) WO2013172648A1 (fr)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017058285A1 (fr) * 2015-10-02 2017-04-06 Sony Mobile Communications Inc. Contrôle de trafic de données d'arrière-plan dans un réseau cellulaire
WO2021040724A1 (fr) * 2019-08-29 2021-03-04 Nokia Technologies Oy Transition en mode passif pour un équipement utilisateur sur la base d'une surveillance de plan de commande

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US20070233721A1 (en) * 2004-07-12 2007-10-04 Sony Ericsson Mobile Communicatins Japan Inc. Receiver Apparatus and Method for Releasing Memory Thereof
US20080081628A1 (en) * 2006-10-03 2008-04-03 Shiang-Rung Ye Systems and methods for determining granularity level of information about buffer status
US20090323524A1 (en) * 2008-06-25 2009-12-31 Atheros Communications, Inc. Invoking different wireless link rate selection operations for different traffic classes

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US20050053070A1 (en) * 2002-04-09 2005-03-10 Jarkko Jouppi Transfer of packet data to wireless terminal
US20070233721A1 (en) * 2004-07-12 2007-10-04 Sony Ericsson Mobile Communicatins Japan Inc. Receiver Apparatus and Method for Releasing Memory Thereof
US20080081628A1 (en) * 2006-10-03 2008-04-03 Shiang-Rung Ye Systems and methods for determining granularity level of information about buffer status
US20090323524A1 (en) * 2008-06-25 2009-12-31 Atheros Communications, Inc. Invoking different wireless link rate selection operations for different traffic classes

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017058285A1 (fr) * 2015-10-02 2017-04-06 Sony Mobile Communications Inc. Contrôle de trafic de données d'arrière-plan dans un réseau cellulaire
WO2021040724A1 (fr) * 2019-08-29 2021-03-04 Nokia Technologies Oy Transition en mode passif pour un équipement utilisateur sur la base d'une surveillance de plan de commande
US12052792B2 (en) 2019-08-29 2024-07-30 Nokia Technologies Oy Passive mode transition for user equipment based on control plane monitoring

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