Source: http://www.google.com/patents/US8208950?dq=5,266,072
Timestamp: 2017-02-28 07:01:06
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Matched Legal Cases: ['application No. 60', 'Application No. 2006252042', 'Application No. 2007202206', 'Application No. 2007202206', 'Application No. 2', 'Application No. 2', 'Application No. 200610064329', 'Application No. 2007101379068', 'Application No. 200610064329', 'Application No. 06118909', 'Application No. 06118909', 'Application No. 08154976', 'Application No. 05112183', 'Application No. 05112183', 'Application No. 07121138', 'Application No. 08849731', 'Application No. 06119590', 'Application No. 10184515', 'Application No. 10183886', 'Application No. 10', 'Application No. 10183886', 'Application No. 06119590', 'Application No. 05112183', 'Application No. 10174218', 'Application No. 06118909', 'Application No. 11160318', 'Application No. 08154976', 'Application No. 06118909', 'Application No. 07121138', 'Application No. 08849315', 'Application No. 08849731', 'Application No. 10184515', 'Application No. 11160318', 'Application No. 2006', 'Application No. 2006', 'Application No. 2007', 'Application No. 10', 'Application No. 10', 'Application No. 10', 'Application No. 10', 'Application No. 10', 'Application No. 10', 'Application No. 10', 'Application No. 200610064329', 'Application No. 200710137906']

Patent US8208950 - Method and apparatus for state/mode transitioning - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA method and apparatus for transitioning states or modes on a user equipment, the method having the steps of receiving, at a network element, a transition indication; checking a radio resource profile for the user equipment; and making a transitioning decision at the network element based on the received...http://www.google.com/patents/US8208950?utm_source=gb-gplus-sharePatent US8208950 - Method and apparatus for state/mode transitioningAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS8208950 B2Publication typeGrantApplication numberUS 12/107,514Publication dateJun 26, 2012Filing dateApr 22, 2008Priority dateNov 13, 2007Fee statusPaidAlso published asCA2705476A1, CA2705476C, CA2705477A1, CA2705477C, CA2705478A1, CA2705478C, CA2851573A1, CA2851573C, CA2922096A1, CN101911815A, CN101911815B, CN101911816A, CN101911816B, CN101911817A, CN101911817B, CN103442453A, CN104254116A, EP2061192A1, EP2061192B1, EP2210433A1, EP2210433A4, EP2210433B1, EP2210446A1, EP2210446A4, EP2210446B1, EP2387283A2, EP2387283A3, EP2424323A2, EP2424323A3, EP2654369A2, EP2654369A3, US7969924, US8243683, US8885607, US9019877, US9026153, US9037167, US9456436, US20090124212, US20090124249, US20090129339, US20110306352, US20120307703, US20120320811, US20130128787, US20130295905, US20130336258, US20170013672, WO2009062302A1, WO2009062303A1, WO2009062304A1Publication number107514, 12107514, US 8208950 B2, US 8208950B2, US-B2-8208950, US8208950 B2, US8208950B2InventorsMuhammad Khaledul Islam, Jeffrey Wirtanen, Takashi Suzuki, Gordon Peter Young, Claude ARZELIEROriginal AssigneeResearch In Motion LimitedExport CitationBiBTeX, EndNote, RefManPatent Citations (109), Non-Patent Citations (137), Referenced by (31), Classifications (10), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetMethod and apparatus for state/mode transitioning
The present disclosure claims priority from U.S. application No. 60/987,672, entitled “Method and Apparatus for State/Mode Transitioning Based on a Radio Resource Profile”, the contents of which are incorporated herein by reference.
In a UMTS network, a Radio Resource Control (RRC) part of the protocol stack is responsible for the assignment, configuration and release of radio resources between the UE and the UTRAN. This RRC protocol is described in detail in the 3GPP TS 25.331 specifications. Two basic modes that the UE can be in are defined as “idle mode” and “UTRA RRC connected mode” (or simply “connected mode”, as used herein). UTRA stands for UMTS Terrestrial Radio Access. In idle mode, the UE or other mobile device is required to request an RRC connection whenever it wants to send any user data or in response to a page whenever the UTRAN or the Serving General Packet Radio Service (GPRS) Support Node (SGSN) pages it to receive data from an external data network such as a push server. Idle and connected mode behaviors are described in the Third Generation Partnership Project (3GPP) specifications TS 25.304 and TS 25.331.
CELL13 DCH: A dedicated channel is allocated to the UE in uplink and downlink in this state to exchange data. The UE must perform actions as outlined in 3GPP 25.331. CELL_FACH: no dedicated channel is allocated to the user equipment in this state. Instead, common channels are used to exchange a small amount of bursty data. The UE must perform actions as outlined in 3GPP 25.331 which includes the cell selection process as defined in 3GPP TS 25.304. CELL_PCH: the UE uses Discontinuous Reception (DRX) to monitor broadcast messages and pages via a Paging Indicator Channel (PICH). No uplink activity is possible. The UE must perform actions as outlined in 3GPP 25.331 which includes the cell selection process as defined in 3GPP TS 25.304. The UE must perform the CELL UPDATE procedure after cell reselection. URA_PCH: the UE uses Discontinuous Reception (DRX) to monitor broadcast messages and pages via a Paging Indicator Channel (PICH). No uplink activity is possible. The UE must perform actions as outlined in 3GPP 25.331 including the cell selection process as defined in 3GPP TS 25.304. This state is similar to CELL_PCH, except that the URA UPDATE procedure is only triggered via UTRAN Registration Area (URA) reselection. The transition from an idle mode to the connected mode and vice-versa is controlled by the UTRAN. When an idle mode UE requests an RRC connection, the network decides whether to move the UE to the CELL_DCH or CELL_FACH state. When the UE is in an RRC connected mode, again it is the network that decides when to release the RRC connection. The network may also move the UE from one RRC state to another prior to releasing the connection or in some cases instead of releasing the connection. The state transitions are typically triggered by data activity or inactivity between the UE and the network. Since the network may not know when the UE has completed the data exchange for a given application, it typically keeps the RRC connection for some time in anticipation of more data to/from the UE. This is typically done to reduce the latency of call setup and subsequent radio resource setup. The RRC connection release message can only be sent by the UTRAN. This message releases the signal link connection and all radio resources between the UE and the UTRAN. Generally, the term “radio bearer” refers to radio resources assigned between the UE and the UTRAN. And, the term “radio access bearer” generally refers to radio resources assigned between the UE and, e.g., an SGSN (Serving GPRS Service Node). The present disclosure shall, at times, refer to the term radio resource, and such term shall refer, as appropriate, to either or both the radio bearer and/or the radio access bearer.
In a particular example, the present system and method provide for the transitioning from an RRC connected mode to a more battery efficient or radio resource efficient state or mode while providing for decision making capabilities at the network. In particular, the present method and apparatus provide for transitioning based on receipt of an indication from a UE indicating, either implicitly or explicitly, that a transition for the RRC state or mode associated with a particular signaling connection with radio resources should occur from one state or mode to another. As will be appreciated, such an indication or request could be an existing communication under current standards, for example a signaling connection release, or could be a new dedicated message to change the state of the UE, such as a “preferred RRC state request”. As used herein, an indication could refer to either scenario, and could incorporate a request.
The transition indication originated by the UE can be sent in some situations when one or more applications on the UE have completed an exchange of data and/or when a determination is made that the UE application(s) are not expected to exchange any further data. The network element can then use the indication and any information provided therein, as well as other information related to the radio resource such as quality of service, Access Point Name (APN), Packet Data Protocol (PDP) context, historical information, among others, defined herein as a radio resource profile, to make a network specific decision about whether to transition the mobile device to another mode or state, or do nothing. The transition indication provided by the UE or mobile device can take several forms and can be sent under different conditions. In a first example, the transition indication can be sent based on a composite status of all of the applications residing on the UE. Specifically, in a UMTS environment, if an application on the UE determines that it is done with the exchange of data, it can send a “done” indication to a “connection manager” component of UE software. The connection manager can, in one embodiment, keep track of all existing applications (including those providing a service over one or multiple protocols), associated Packet Data Protocol (PDP) contexts, associated packet switched (PS) radio resources and associated circuit switched (CS) radio resource. A PDP context is a logical association between a UE and PDN (Public Data Network) running across a UMTS Core Network. One or multiple applications (e.g., an email application and a browser application) on the UE may be associated with one PDP context. In some cases, one application on the UE is associated with one primary PDP context and multiple applications may be tied with secondary PDP contexts. The connection manager receives “done” indications from different applications on the UE that are simultaneously active. For example, a user may receive e-mail from a push server while browsing the web. After the email application has sent an acknowledgment, it may indicate that it has completed its data transaction. The browser application may behave differently and instead make a predictive determination (e.g., using an inactivity time) of when to send a “done” indication to the connection manager.
A maximum number of message per time-window (e.g., “no more than 15 messages every 10 minutes”) may be used/specified instead of, or in addition to, the inhibit duration.
Using this for one of the specific transition indication examples mentioned above, if the UE determines that it is done with the exchange of data, for example if a “connection manager” component of the UE software is provided with an indication that the exchange of data is complete, then the connection manager may determine whether or not to tear down the signaling setup 312. For example, an email application on the device sends an indication that it has received an acknowledgement from the push email server that the email was indeed received by the push server. The connection manager can, in one embodiment, keep track of all existing applications, associated PDP contexts, associated PS radio resources and associated circuit switched (CS) radio bearers. In other embodiments a network element (e.g., the UTRAN) can keep track of existing applications, associated PDP contexts, QoS, associated PS radio resources and associated CS radio bearers. A delay can be introduced at either the UE or network element to ensure that the application(s) is (are) truly finished with data exchange and no longer required an RRC connection even after the “done” indication(s) have been sent. This delay can be made equivalent to an inactivity timeout associated with the application(s) or the UE. Each application can have its own inactivity timeout and thus the delay can be a composite of all of the application timeouts. For example, an email application can have an inactivity timeout of five seconds, whereas an active browser application can have a timeout of sixty seconds. A delay can further be introduced between repeated indications or state change requests. Based on a composite status of all such indications from active applications, as well a radio resource profile and/or resend delay in some embodiments, the UE software decides how long it should wait before it sends a transition indication (e.g., a signaling connection release indication or state change request) for the appropriate core network (e.g., PS Domain). If the delay is implemented at the network element, the element makes a determination of whether to and how to transition the UE, but only operates the transition after the delay has run its course.
In one implementation of this example, the UE, upon receiving a request to release, or abort, a signaling connection from upper layers for a specific CN (core network) domain, initiates the signaling connection release indication procedure if a signaling connection is identified in a variable. For example, a variable ESTABLISHED_SIGNALING_CONNECTIONS, for the specific CN domain identified with the IE (information element) “CN domain identity” exists. If the variable does not identify any existing signaling connection, any ongoing establishment of a signaling connection for that specific CN domain is aborted in another manner. Upon initiation of the signaling connection release indication procedures in the CELL_PCH or URA_PCH states, the UE performs a cell update procedure using a cause “uplink data transmission”. When a cell update procedure is completed successfully, the UE continues with the signaling connection release indication procedures that follow.
An IE “Signaling Release Indication Cause” is also used pursuant to an embodiment of the present disclosure. The release cause is aligned, for instance, with existing message definitions. The upper layer release cause message is structured, e.g., as:
IE type Information and Semantics Element/Group name Need Multi reference description Signaling Release MP Enumerated Indication Cause (UE Requested PS Data session end, T3310 expiry, T3330 expiry, T3340 expiry) In this example, the T3310, T3330, and T3340 expires correspond to expiration of correspondingly numbered timers, identified previously. A cause value is settable, in one implementation, as a “UE Requested PS Data session end” rather than a “UE requested idle transition” to remove the UE indication of a preference for an idle transition and provide for the UTRAN to decide upon the state transition, although the expected result corresponds to that identified by the cause value. The extension to the signaling connection release indication is preferably, but not necessarily, a non-critical extension.
In a further embodiment, instead of a “signaling connection release indication or request”, a “preferred state request” could be utilized. Functionality similar to that described in FIGS. 9 and 10 above would be applicable to this preferred state request indication.
Conversely, if it is determined in step 2022 that the request was not successful, the process to step 2024 and waits for a time period. Such a wait could be implemented using an “inhibit duration” that would not allow the mobile to send another preferred state request message before a given duration has elapsed. Alternatively, the process could limit the number of preferred state request messages within a given time period (e.g., no more than 15 messages in 10 minutes). A combination of the inhibition duration and limiting the number of messages in a time duration could also be combined.
Reference is now made to FIG. 5B. FIG. 5B illustrates the same infrastructure “three” as FIG. 5A with the same connection time of about two seconds to get the RRC connection setup 310, signaling connection setup 312, ciphering integrity setup 314 and radio bearer setup 316. Further, RLC data PDU exchange 420 takes approximately two to four seconds.
An exemplary case for such methods can be drawn for always on devices. As described, various APNs or QoS parameters can be linked to a specific behavior for always on. Consider initially granted radio resources that may be desirable based on an ‘always on’ profile. The network now has a means to ‘know’ that data bursts are short and bursty for always-on applications, such as email. For those skilled in the art, it is clearly seen that given this information, there is no incentive to save code space for trunking efficiency on the network. Thus a maximum rate may be allocated to an always-on device with little risk of not reserving enough code space for other users. Additionally the UE benefits in receiving data more rapidly and also saves on battery life due to shorter ‘on time’. Again, to those skilled in the art, high data rates have very little effect on current draw since power amplifiers are fully biased regardless of data rate.
The number of indications received in a predetermined time period could indicate to the network that a transition should not occur. Thus, if the user equipment has sent, for example, five indications within a thirty second time period, the network may consider that it should ignore the indications and not perform any transitions. Alternatively, the network may determine to indicate to the UE that it should not send any further indications either indefinitely or for some configured or predefined time period. This could be independent of any “inhibit duration and/or maximum indication/request messages per time-window” on the UE.
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