News Column

"Methods and Arrangements in a Mobile Telecommunications Network" in Patent Application Approval Process

June 26, 2014



By a News Reporter-Staff News Editor at Politics & Government Week -- A patent application by the inventors SAGFORS, Mats (KYRKSLATT, FI); LINDSTROM, Magnus (SPANGA, SE); PEISA, Janne (ESPOO, FI); TORSNER, Johan (MASABY, FI); WAGNER, Stefan (ESPOO, FI), filed on February 5, 2014, was made available online on June 12, 2014, according to news reporting originating from Washington, D.C., by VerticalNews correspondents.

This patent application is assigned to Telefonaktiebolaget L M Ericsson (publ).

The following quote was obtained by the news editors from the background information supplied by the inventors: "The Universal Mobile Telecommunication System (UMTS) is one of the third generation mobile communication technologies designed to succeed GSM and 3GPP Long Term Evolution (LTE) is a project within the 3.sup.rd Generation Partnership Project (3GPP) to improve the UMTS standard. UMTS Terrestrial Radio Access Network (UTRAN) is the radio access network of a UMTS system and evolved UTRAN (E-UTRAN) is the radio access network of an LTE system. In UTRAN, the User Equipments (UE) are wirelessly connected to the radio base stations denoted NodeBs (NB) and the NBs are controlled by Radio Network Controllers (RNC). The RNCs are further connected to the core network. However, the radio base stations in E-UTRAN are called evolved NodeB (eNB) and the eNBs are connected directly to the core network.

"In UTRAN, each UE is configured with different configurations associated with resource management. Examples of such a configuration are scheduling configuration, MIMO (Multiple Input Multiple Output) configuration, measurement configuration and DRX configuration. Hence, the UE is e.g. given one specific scheduling configuration and the UE should behave in a certain way when it receives a scheduling command based on the scheduling configuration.

"In E-UTRAN, it is desired to be able to handle a plurality of configurations associated with the same type of radio resource management. E.g. it would be desired to be able to handle a plurality of scheduling configurations and to switch between the plurality of different scheduling configurations. The existing procedure to reconfigure a single configuration with RRC (radio resource control) procedures would be too slow when more than one configuration is used.

"More specifically, there is a need to configure and re-configure multiple configurations in a UE, such that switching between the configurations can be made in a quick manner.

"Furthermore, in UTRAN synchronized re-configuration of radio resource related configurations are handled by using an activation time. I.e. an activation time which is a reference to a certain connection frame number (CFN) is included in a radio resource control (RRC) protocol message (which is a higher protocol layer message) in order to assure that the UE starts using the new configuration at the same time instance as the Node B. Since the RRC message may be subject to retransmissions on a lower protocol layer, the activation time must be set far enough into the future to allow for retransmissions of the message. Even if the average retransmission delay is small there are a few percent of the messages that needs several retransmissions. The activation time needs to be set to cover also the worst case which leads to that synchronized re-configuration in UTRAN causes a relatively long delay. It has been a desire in E-UTRAN to avoid these delays.

"Another undesirable consequence of the activation time in UTRAN is the fact that the execution of an RRC procedure in the UE may take considerable time. Therefore, in UTRAN RRC, it has been necessary to specify the handling of several parallel ongoing procedures in the UE. This issue has resulted in a lot of complexity in the specifications.

"Due to these drawbacks, there is a strong desire to avoid the 'activation time solution' in the RRC specification for E-UTRAN.

"Examples of RRC configurations that may require synchronization between the UE and the radio base station are scheduling, MIMO parameters, switching of CQI reporting."

In addition to the background information obtained for this patent application, VerticalNews journalists also obtained the inventors' summary information for this patent application: "Thus, the object of the present invention is to achieve improved methods and arrangements for managing radio resource related configurations.

"The object is achieved by using an identifier of a predefined type identifying one configuration on an out-band control channel for activating the configuration identifiable by that identifier. The identifier is sent from the network to the UE, when a configuration corresponding to that identifier is to be activated. This implies that both the UE and the radio base station comprise a mapping between each configuration and the corresponding identity of each configuration.

"According to a first aspect of the present invention a method for a radio network node in a mobile telecommunications network supporting multiple configurations associated with radio resource management is provided. In the method each configuration of the multiple configurations is associated with an identifier of a predefined type, and one configuration is activated by sending, out-band on a downlink control channel, an identifier of the predefined type identifying said configuration to be activated.

"According to a second aspect of the present invention a method for a UE in a mobile telecommunications network, wherein the UE is configured to store and use a multiple configurations associated with a radio resource management is provided. In the method each configuration of the multiple configurations is associated with an identifier of a predefined type. It is monitored whether an identifier of the predefined type is received, and when an identifier of the predefined type associated with one of the configurations is received the configuration identified by the received identifier of the predefined type is activated.

"According to a third aspect of the present invention a radio network node connectable to a mobile telecommunications network supporting multiple configurations associated with radio resource management is provided. The radio network node comprises a unit for associating each configuration of the multiple configurations with an identifier of a predefined type, and a unit for activating one configuration by sending, out-band on a downlink control channel, an identifier of the predefined type identifying said configuration to be activated.

"According to a fourth aspect of the present invention a UE connectable to a mobile telecommunications network, wherein the UE is configured to store and use a multiple configurations associated with a radio resource management is provided. The UE comprises a unit for associating each configuration of the multiple configurations with an identifier of a predefined type. A monitor for monitoring whether an identifier of the predefined type is received is further provided. The UE further comprises a unit for activating the configuration identified by the received identifier of the predefined type when an identifier of the predefined type associated with one of the configurations is received.

"An advantage with embodiments of the present invention is that it enables a fast activation of a selected configuration.

"A further advantage with embodiments of the present invention is that different scheduling strategies, such as persistent scheduling and bundling can be implemented without introducing excessive signaling burden on the control channel.

"A yet further advantage with embodiments of the present invention is that the solution is future proof: No additional extension of PDCCH is needed when new scheduling strategies are introduced. New scheduling strategies can be introduced by enabling those in higher-layer protocols that configure the new solutions.

BRIEF DESCRIPTION OF DRAWINGS

"FIG. 1 illustrates one configuration, referred to as persistent scheduling, which embodiments of the present invention can activate.

"FIG. 2 illustrates a regular scheduling method according to prior art.

"FIG. 3 illustrates how the radio base station sets up a second RNTI identifying a scheduling method according to embodiments of the present invention.

"FIGS. 4-7 illustrate further embodiments of the present invention.

"FIG. 8 illustrates a UE and a radio base station according to embodiments of the present invention.

"FIGS. 9-10 are flowcharts of the methods according to embodiments of the present invention."

URL and more information on this patent application, see: SAGFORS, Mats; LINDSTROM, Magnus; PEISA, Janne; TORSNER, Johan; WAGNER, Stefan. Methods and Arrangements in a Mobile Telecommunications Network. Filed February 5, 2014 and posted June 12, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=3951&p=80&f=G&l=50&d=PG01&S1=20140605.PD.&OS=PD/20140605&RS=PD/20140605

Keywords for this news article include: Telecommunications, Telefonaktiebolaget L M Ericsson (publ).

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Source: Politics & Government Week


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