KR20160044019A - Mobile station, core network node, base station subsystem, and methods for implementing longer paging cycles in a cellular network - Google Patents

Abstract

A mobile station, a core network node, a base station subsystem, and various methods for implementing long paging periods (longer DRX mode) in a cellular network are described herein, which has the potential to reduce the energy consumption of the mobile's battery.

Description

TECHNICAL FIELD [0001] The present invention relates to a mobile station, a core network node, a base station subsystem, and methods for implementing longer paging periods in a cellular network, and more particularly to a mobile station, a core network node, a base station subsystem,

[Priority claim]

This application claims benefit of priority from U.S. Provisional Application No. 2484 / DEL / 2013 filed on August 22, 2013, and U.S. Provisional Application Serial No. 61 / 888,310, filed October 8, The entire contents of each of these applications are incorporated herein by reference for all purposes.

[TECHNICAL FIELD]

The present invention relates to a mobile station, a core network node, a base station subsystem, and various methods for implementing longer paging cycles within a cellular network.

 The following abbreviations are defined herein, at least some of which are incorporated into the following description of the prior art and the present invention.

AFC Automatic Frequency Control

ATC Automatic Time Control

BA BCCH Allocation (BCCH allocation)

BCCH Broadcast Control Channel (broadcast control channel)

BS-PA-MFRMS Base Station Paging Multiframes

BSIC Base Station Identification Code

CCCH Common Control Channel

CRC Cyclic Redundancy Check

DRX Discontinuous Reception

E-UTRA Evolved-Universal Terrestrial Radio Access (Evolved Universal Terrestrial Radio Access)

FCCH Frequency Correction Channel

GSM Global System for Mobile Communications

HLR Home Location Register

LA Location Area

MS Mobile Station

MTC Machine Type Communication

NAS Non Access Stratum (non-access layer)

RA Routing Area

RSSI Received Signal Strength Indicator

SCH Synchronization Channel

TSC Training Sequence Code

UTRA Universal Terrestrial Radio Access (Universal Terrestrial Radio Access)

In today's GSM network, each registered mobile station (MS) changes between 0.47 and 2.12 seconds, and also the parameter BS-PA-MFRMS [3GPP TS 44.018 V11.3.0 (2012), the contents of which are incorporated herein by reference -11) (see < RTI ID = 0.0 > chapter 10.5.2.11). ≪ / RTI > The length of the paging period is set to achieve a balance between acceptable response and MS battery life for mobile terminated call set-up procedures. Today, the MS uses a considerable amount of power to decode and process unintended reception information for itself when it periodically checks for incoming paging messages and performs other idle mode activities. This leads to considerable information overhead, which rapidly consumes the MS battery for MSs, particularly characterized as MTC devices.

A mobile station, a core network node, a base station subsystem, and various methods for implementing paging periods in a cellular network to solve the problems of existing systems are described herein. Advantageous embodiments of mobile stations, core network nodes, base station subsystems, and various methods are further described herein.

In one aspect, a mobile station is configured to implement paging periods in a cellular network. A mobile station comprising at least one processor and at least one memory for storing processor executable instructions, the at least one processor interfacing with at least one memory for executing processor executable instructions, It is operable to determine whether it is acceptable for the serving cell in the network to remain camped on. If the decision result is that it is acceptable for the serving cell to remain in the camp-on state, the mobile station then executes a first type of synchronization procedure (short sync up procedure) (E.g., a paging block, a CCCH block, a paging message, a paging notification), wherein the first DRX mode has a longer time period than the legacy second DRX mode. If the decision result is that it is unacceptable for the serving cell to remain in the camp-on state, or if the mobile station is unable to read the received radio block during the first type of synchronization procedure, then the mobile station may initiate a second type of synchronization procedure Wherein the first type of synchronization procedure is operable to execute a long sync up procedure and also to attempt to read another wireless block, wherein the first type of synchronization procedure is shorter than the second type of synchronization procedure Respectively. A mobile station operating in this manner has the advantage of reducing the energy consumption of the mobile station battery as compared to a mobile station operating under a legacy paging cycle.

In another aspect, a method at a mobile station is for implementing paging periods in a cellular network. The method includes determining if the mobile station is acceptable for the serving cell in the cellular network to stay in the camp-on state. If the result of the determination is that it is acceptable for the serving cell to remain in the camp-on state, then the mobile station executes a first type of synchronization procedure (short sync up procedure) and, in accordance with the first DRX mode, For example, a paging block, a CCCH block, a paging message, a paging notification, where the first DRX mode has a longer time period than the legacy second DRX mode. If the outcome of the decision is that it is unacceptable for the serving cell to remain in the camp-on state, or if the mobile station is unable to read the received radio block during the first type of synchronization procedure, then the mobile station may initiate a second type of synchronization procedure (A long sync up procedure) and attempts to read another radio block, where the first type of synchronization procedure has a shorter duration than the second type of synchronization procedure. Since the method is expected for most of the time that the mobile station will be able to determine that it is acceptable for the serving cell to remain camped on and is also likely to be able to successfully read the radio block during the short sync up procedure, Thereby reducing the energy consumption of the battery.

In another aspect, a base station subsystem (BSS) is configured to implement paging periods for a mobile station in a cellular network. A BSS, comprising: at least one processor; and at least one memory for storing processor executable instructions, wherein at least one processor interfaces with at least one memory to execute processor executable instructions, From a core network node in a cellular network, the BSS may include information needed for a base station to generate and transmit a radio block (e.g., a paging block, a CCCH block, a paging message, a paging notification) Message. ≪ / RTI > The BSS is also operable to transmit a radio block in accordance with a first DRX mode, rather than a legacy second DRX mode, in one or more cells of a mobile station's paging area, wherein the first DRX mode is longer than a legacy second DRX mode Respectively. The BSS operating in this manner has the advantage of reducing the energy consumption of the mobile's battery.

In another aspect, a method in a BSS is for implementing paging periods for a mobile station in a cellular network. The method is characterized in that the BSS is required from the core network node in the cellular network to allow the BSS to originate and transmit radio blocks (e.g., paging blocks, CCCH blocks, paging messages, paging notifications) The method comprising the steps of: The BSS also transmits a radio block in accordance with a first DRX mode, rather than a legacy second DRX mode, in one or more cells of the paging area of the mobile station, wherein the first DRX mode has a longer time period than the legacy second DRX mode. The method has the advantage of reducing the energy consumption of the mobile station's battery.

In yet another aspect, a core network node is configured to implement paging periods for a mobile station in a cellular network. A core network node comprising at least one processor and at least one memory for storing processor executable instructions, the at least one processor interfacing with at least one memory for executing processor executable instructions, The network node is operable to identify the mobile station as being configured according to the first DRX mode rather than the legacy second DRX mode wherein the first DRX mode has a longer time period than the legacy second DRX mode. The core network node is also operable to receive a downlink payload for the mobile station. Upon receipt of the downlink payload, the core network node notifies one or more BSSs that manage cells in the paging area of the mobile station, that each BSS has a radio block for the mobile station in accordance with the first DRX mode (e.g., , A CCCH block, a paging message, a paging notification) on a wireless interface. The core network node operating in this manner has the advantage of reducing the energy consumption of the mobile's battery.

In another aspect, a method at a core network node is for implementing paging periods for a mobile station in a cellular network. The method includes identifying a mobile station as being configured according to a first DRX mode rather than a legacy second DRX mode wherein the first DRX mode has a longer time period than the legacy second DRX mode. The core network node also receives a downlink payload for the mobile station. Upon receipt of the downlink payload, the core network node notifies the one or more BSSs managing the cells in the paging area of the mobile station that each BSS has a radio block (e. G., Paging Block, CCCH block, paging message, paging notification) on the air interface. The method has the advantage of reducing the energy consumption of the mobile station's battery.

 Additional aspects of the invention will be set forth, in part, in the following description, drawings, and in any claims, and will be derived in part from the detailed description, or may be learned by practice of the invention. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as disclosed.

A more complete understanding of the present invention may be obtained by reference to the following detailed description taken in conjunction with the following drawings.
1 is a block diagram of a mobile communication system in which a core network node (e.g., SGSN), multiple BSSs, and a mobile station (e.g., an MTC device) are configured to implement longer paging periods than conventional ones in accordance with different embodiments of the present invention. Lt; RTI ID = 0.0 > cellular < / RTI >
2 is a flow diagram of a method in a mobile station (e.g., an MTC device) for implementing longer paging periods than conventional ones in accordance with the present invention;
3 is a flow diagram of a method in a mobile station (e.g., an MTC device) for implementing paging periods with a longer duration than in the prior art, in accordance with an embodiment of the present invention;
4 is a flow diagram of a method in a mobile station (e.g., MTC) for implementing paging periods with a longer duration than in the prior art according to another embodiment of the present invention;
5 is a flow diagram of a method in a BSS for implementing paging periods with a longer duration than in the prior art according to different embodiments of the present invention; And
6 is a flow diagram of a method at a core network node for implementing paging periods with a longer duration than in the prior art, in accordance with an embodiment of the present invention.

The existing 3GPP specification assumes that the requirements for the reachability of each MS are time critical, i.e., that communications should be initiated as soon as possible after the initial reception of an incoming paging message (paging block) in the core network. This means that each MS must consume a considerable amount of energy in decoding unintended information about itself when checking the incoming page periodically every time that paging block occurs. This prevents prolonged sleep mode at the MS. For time-critical applications, e.g., for certain types of MTC applications, such time critical reachability is a significant proportion of these types of applications may be used for downlink communications May not be necessary as it is not expected to be particularly time-critical to the mechanism, since the payload itself is not very time-critical. Therefore, if paging group monitoring is performed more infrequently by particular types of MSs (e.g., MTC devices) that require less time-critical communication, then less energy is consumed by these MSs in these cases Will be. The present invention avoids the need for time-critical paging mechanisms for those cases where fast delivery of downlink payloads is not needed, so that battery power is reduced due to unnecessary time critical management of downlink communication (i.e., paging group monitoring) Solves the problem of excessive power consumption by these particular types of MSs (for example, they may not have access to the external power source) as a major bottleneck in operation. In other words, the disclosed techniques reduce the energy consumption of these particular types of MSs while in idle mode, leading to a significant reduction in the rate at which battery power is consumed in MSs. A detailed description of this technique in various embodiments is provided below with respect to Figures 1-6.

Referring now to Figure 1, there is shown a mobile communication system 100 that includes a core network node 102 (e.g., SGSN 102), multiple BSSs 104 ₁ , 104 ₂ ... 104 _n , There is a diagram of an exemplary cellular network 100 that may be used to help illustrate a manner that is configured to implement paging periods with a longer duration than in the prior art according to embodiments. Exemplary cellular network 100 includes at least a core network node 102 (e.g., SGSN 102) that interfaces with HLR 108 and multiple BSSs 104 ₁ , 104 ₂ ... 104 _n . In this example, the BSS 104 ₁ manages the cells 110 _1a , 110 _1b ... 110 _1x . The BSS 104 ₂ manages the cells 110 _2a , 110 _2b ... 110 _2x . The BSS 104 _n manages the cells 110 _na , 110 _nb .. 110 _nx . In this example, only one mobile station 106, which is located in cell 110 _1b and is served by BSS 104 ₁ , is shown. However, this can be supported mobile stations 106 and any number of cells also _{(110 1a, 110 1b ... 110} 1x, 110 2a, 110 2b ... 110 2x and 110 _{na, nb} ... 110 110 _nx ), ≪ / RTI > In addition, the cellular network 100, the core network node 102 (e.g., SGSN 102), the BSSs 104 ₁ , 104 ₂ ... 104 _n , mobile station 106, And only those components and functionality that are required to describe and enable the disclosed techniques for clarity are described herein. A detailed discussion of the basic concepts of the disclosed novel technology is provided below, and the detailed discussion is given below with reference to FIGS. 2-6, which illustrate a mobile station 106, BSSs 104 ₁ , 104 ₂ ... 104 _n , It is provided to illustrate the manner in which the core network node 102 (e.g., SGSN 102) is configured to implement paging periods with a longer duration than in the prior art, according to various possible embodiments.

For a basic concept, a longer paging cycle (long DRX mode) is introduced for MSs 106 (e.g., MTC devices 106), which pays the battery power of such MSs 106 primarily It is used in less time-critical communications to save. These MSs 106 may be identified by the core network node 102 at registration (e.g., based on information contained in registration-related NAS signaling or based on subscription information maintained by the HLR 108) The core network node 102 will be aware of the device type and the currently established DRX period for that MS 106 (i.e., the paging cycle). In addition, the core network node 102 may take appropriate actions whenever the downlink payload 112 becomes available to a particular one of these MSs 106, The BSSs 104 ₁ managing the cells 110 _1a , 110 _1b ... 110 _1x , 110 _2a , 110 _2b ... 110 _2x and 110 _na , 110 _nb ... 110 _nx in the paging area 113 (E.g., paging block 114, paging message 114, paging notification 114, CCCH block 114) for the mobile station 106 to the set of mobile stations 106, 104 ₂ ... 104 _n on the air interface And transmits a message 111 containing information needed by the BSSs 104 ₁ , 104 ₂ ... 104 _n to transmit.

The MS 106 performs essential tasks specific to the idle mode, including periodically waking and checking the reception of the radio block 114, while in the idle mode, and then returns to the sleep mode. In the sleep mode, the MS 106 cuts the clock for most of its modules, thereby operating in a power saving mode. The longer the sleeping period, the more power is saved. Therefore, in order to maximize the power saved by the MS 106 during the power saving mode, a good option would be to prolong the sleep duration (e.g., to consecutively instantiate wake up Increase the time between. The disclosed techniques perform this functionality.

To appreciate the benefits of the present invention, it should be appreciated that a typical MS will perform the following steps once it camps in a suitable serving cell:

 (1) Read BCCH information for the BA list: The MS reads the BCCH to obtain a neighboring cell list.

 (2) Performs RSSI measurements on the identified neighboring cells using step (1).

 (3) BSIC identification: Reads the FCCH and SCH of the cells in the cell database (neighbor + serving) to identify the cell ID. When a new cell is found, it is added to the cell database for periodic monitoring.

 (4) BSIC reconfirmation: The cell ID of neighboring and serving cells already detected is reaffirmed by reading the SCH.

 (5) Cell reselection: camps on the most detected neighbor cell.

 (6) LA / RA update: Launch NAS procedures to update LA and RA as needed.

 (7) AFC: Correct the frequency of the local clock.

All of these tasks put a considerable burden on the normal MS in the idle mode, which leads to considerable power consumption to keep the conventional MS synchronized with the network to receive paging messages in a time-critical manner. The presently disclosed techniques reduce this overhead by eliminating the execution of the tasks based on the periodicity and instead allowing the MS 106 to perform them on a need basis. In particular, this overhead is particularly useful when the MS 106 has no periodic RSSI measurements while in the dormant mode, has no background neighbor cell searches, no BA list reads (e.g., no BCCHs every 30 seconds) No reading) and no SCH reading for BSIC re-verification every 30 seconds. Instead, the MS 106 is configured to implement the procedure as described in detail below with respect to Figures 2-4.

2, there is a flow diagram of a method 200 in a mobile station 106 (e.g., MTC device 106) for implementing paging periods with a longer duration than in the prior art, in accordance with the disclosed technique. The mobile station 106 includes at least one processor 116 and at least one memory 118 for storing processor executable instructions wherein at least one processor 116 interfaces with at least one memory 118 Processor executable instructions to cause the mobile station 106 to be operable in step 202 to determine that it is unacceptable for the serving cell 110 _1b to remain in the camp-on state (e.g.). Additional discussion is provided below with respect to different methods by which the mobile station 106 may perform step 202. If the mobile station 106 determines that it is acceptable for the serving cell 110 _1b to stay in the camp-on state, then in step 204 the mobile station 106 (step 204a) receives a first type of synchronization procedure (E.g., paging block 114, CCCH block 114, paging message 114, paging notification 114) received in accordance with a first DRX mode (i.e., a long DRX mode) It also tries to read (step 204b). The first DRX mode has a longer time period than the legacy second DRX mode. If the mobile station 106 is able to read the received radio block 114, then at step 206, the mobile station 106 then performs an action (step 206a) based on the content in the received radio block 114 (2) scheduling the next wake-up time based on the first DRX mode (i.e., the long DRX mode) to perform the determination of step 202 (step 206b), and then entering the sleep mode (Step 206c). If the mobile station 106 determines that it is unacceptable for the serving cell 110 _1b to remain camped on during step 202 or if it is not possible for the mobile station 106 to read the received radio block 114 during step 204b , The mobile station 106 schedules the next wakeup in accordance with the first DRX mode (i.e., the long DRX mode), and then proceeds to step 208, where the mobile station 106 initiates a second type of synchronization procedure Long synchronization procedure) (step 208a) and attempts to read another radio block 114a (e.g., another CCCH block 114a) (step 208b). If the mobile station 106 is able to read another received radio block 114a during step 208b, then at step 210, the mobile station 106 then determines (1) based on the content in another received radio block 114a (Step 210a); (2) schedule the next wake-up time based on the first DRX mode to perform the determination of step 202 (step 210b), and then (3) enter the sleep mode (step 210c). If the mobile station 106 is unable to read another received radio block 114a during step 208b, then at step 212, the mobile station 106 may (1) initiate a first DRX mode (Step 212a), and then (2) enters a sleep mode (step 212b). A detailed description of two exemplary embodiments of the method 200 is described below with respect to Figs.

3, there is a flow diagram of a method 300 in a mobile station 106 (e.g., MTC device 106) for implementing paging periods with a longer duration than in the prior art, according to an embodiment. The mobile station 106 includes at least one processor 116 and at least one memory 118 for storing processor executable instructions wherein at least one processor 116 interfaces with at least one memory 118 Processor executable instructions to cause the mobile station 106 to be operable in step 302 to determine if it is acceptable for the serving cell 110 _1b to remain in the camp-on state (e.g.). For example, the mobile station 106 may perform step 302 as follows: (1) based on a first DRX mode with a longer time period than the legacy second DRX mode, Wakes up (step 302a) to one hour (e.g., five slots before the DRX period wakeup time); (2) tuning to the radio frequency of the beacon channel of the serving cell 110 _1b (step 302b) and measuring the RSSI of the beacon channel from the serving cell 110 _1b ; And (3) compares the threshold and the RSSI (step 302c). If the RSSI is greater than the threshold value, then it is acceptable for the serving cell 110 _1b to stay in the camp-on state. Otherwise, if RSSI is less than the threshold, then serving cell 110 _lb is not acceptable to stay in the camp-on state.

If the mobile station 106 determines that it is acceptable for the serving cell 110 _1b to stay in the camp-on state, then in step 304, the mobile station 106 transmits a first type of synchronization procedure (i.e., a short synchronization procedure) . For example, the mobile station 106 may execute a first type of synchronization procedure as follows: (1) reading a predetermined number of bursts from the received beacon channel of serving cell 110 _1b (304a) ; (2) retrieve (304b) the TSC in the read bursts to confirm the cell identification of the serving cell (110 _1b ); (3) execute AFC operations and ATC operations (304c); And (4) scheduling for reception of the radio block 114 (304d). After step 304, the mobile station 106 executes step 306 and attempts to read the radio block 114 (e.g., CCCH block 114). After the mobile station 106 is able to read the received radio block 114 (e.g., if it can decode the radio block 114 and pass the CRC), then at step 306a, Performs an action based on the content in the radio block 114 (e.g., forwards the data to an upper layer); (2) scheduling the next wake-up time based on the first DRX mode (i.e., the long DRX mode) to perform the determination of step 302, and then entering the sleep mode. If the mobile station 106 can not read the received radio block 114 (e.g., can not decode the radio block 114 or pass the CRC), then at step 306b, A second type of synchronization procedure (i. E., A long synchronization procedure < / RTI > to perform a full cell search procedure before being ready for a radio block read (i. E., CCCH reading) in a DRX wake- ), And then enters a sleep mode.

If the mobile station 106 determines that it is unacceptable for the serving cell 110 _1b to remain camped on during step 302 (the number "A" in FIG. 3 shows the connection between steps 302c and 308) If the mobile station 106 is unable to read the received radio block 114 during step 306, then at step 308, the mobile station 106 determines, based on the first DRX mode to execute the second type of synchronization procedure, Wake up at a predetermined second time (e.g., 3 to 5 seconds before the DRX period wakeup time) before the start time of the next paging period. For example, the mobile station 106 may execute a second type of synchronization procedure as follows: (1) perform an RSSI measurement on different frequencies (step 310a); (2) perform an FCCH search (step 310b); (3) an SCH search is performed (step 310c); And (4) reads the BCCH information (step 310d). After step 310, the mobile station 106 attempts to read another radio block 114a (e. G., Another CCCH block 114a) If the mobile station 106 is able to read another received radio block 114a (e. G., Decodes the radio block 114a and passes the CRC), then at step 312a, Perform an action based on the content in another receiving radio block 114a (e.g., pass data to an upper layer); (2) schedule the next wake-up time based on the first DRX mode to perform the determination of step 302, and then (3) enter the sleep mode. If the mobile station 106 is not able to read (e.g., can not decode another radio block 114a or pass the CRC), the receiving radio block 114 then proceeds to step 312b, where the mobile station 106 is then used to execute a full cell search procedure before being ready for another radio block read (i.e., CCCH reading) in the DRX wakeup period of the next time based on the first DRX mode Schedules a schedule (i.e., a long synchronization procedure), and then enters a sleep mode. The method 300 is further described below.

Once a long DRX period has been established, the mobile station 106 may send its nominal long DRX paging block 114 to perform some limited initial check and sync up operations, as described in steps 302 and 302a. (As determined by the actual long DRX wakeup time) will only wake up, for example, 5 slots earlier than scheduled to be received from that serving cell 110 _1b (e.g.). The mobile station 106 will verify by the mobile station 106 that it is already in sync with the same serving cell 110 _1b that it was camping on when it last performed these limited operations successfully. When limited operations are performed, the serving cell 110 _1b may not actually be the highest cell at that point, but if the mobile station 106 is still synchronized with the serving cell 110 _1b , then the mobile station 106 will proceed. The steps corresponding to these limited operations are as follows:

(1) tunes to the radio frequency (RF) of the beacon frequency of the serving cell and measures the RSSI thereon (step 302b).

(2) compares and determines if the RSSI of the serving cell 110 _1b is still higher than the threshold value (step 302c).

(3) If the outcome of step 2 is YES, this indicates that the mobile station 106 can continue to its current serving cell 110 _1b and perform the following:

a. If the mobile station 106 is to retrieve the number of TSCs in any received normal bursts (i.e., the cell ID has not changed since the last time the mobile station 106 successfully performed a limited set of operations) (Steps 304a and 304b), performs frequency and time correction (step 304c), and then schedules a CCCH read (i.e., the mobile station 106 is in a long DRX mode) And schedules the reading of its nominal paging block 114 to be determined (step 304d).

b. If the CCCH reading is successful 306a (i.e., if the valid radio block 114 is read), then the mobile station 106 acts accordingly and schedules the next wake-up time according to the long DRX mode, Where the mobile station 106 will wake up as early as a small number of time slots (TSs) (e.g., 5 TS) to perform limited initial check and sync up operations (steps 302 and 304). If not (i.e., no valid radio block 114 is read), then the mobile station 106 schedules its next wakeup time according to the long DRX mode, but the mobile station 106 can use the initial cell search method (E.g., 3 to 5 seconds) than the nominal long DRX paging block 114 is scheduled to be received in order to perform the uplink (i.e., the mobile station is normally running after powering on) , 308 and 310). This indicates that the mobile station 106 will scan through the frequencies and detect FCCH and SCH (steps 310b and 310c) and perform appropriate (i.e., complete) cell selection operations according to the measured strongest RSSI (step 310a) . The mobile station 106 will perform all of these steps before it is scheduled to receive its nominally long DRX paging block 114 because the mobile station 106 has been woken up 3-5 seconds earlier than its nominally long DRX period Because. The mobile station 106 then schedules a CCCH read (i.e., paging block 114 read), and this time there is a high likelihood that the CCCH read will pass (i.e., succeed) (step 312). If the CCCH read passes, then the mobile station 106 will proceed to sleep through the long DRX mode, and when it wakes up next, the mobile station 106 will only perform limited initial check and sync up operations (steps 302 and 304), otherwise the mobile station 106 will again schedule the next wake-up time according to the long DRX mode, but the mobile station 106 performs the initial cell search method, as described in steps 312b, 308 and 310 (E.g., 3 to 5 seconds) before its nominal long DRX paging block 114 is scheduled to be received.

(4) If the result of step 2 is NO, this means that the current cell 110 _1b is not suitable for signal reception, in which case the mobile station 106 schedules the next wake up time according to the long DRX mode , But to perform an initial cell search method (i. E., A long sync up procedure) as discussed above in step 3b, as described in steps 302,308, 310 and 312, its nominal long DRX paging block 114 Will wake up much earlier (e.g., 3 to 5 seconds) before being scheduled to be received.

As an alternative option, to allow the mobile station 106 to still have the opportunity to receive the radio block 114 (e.g., paging block 114, CCCH block 114, paging message 114, paging notification 114), the BSS 104 ₁ ) may transmit to the mobile station 106 using the nominal long DRX block if the result of step 2 is no (e.g.), and then the mobile station 106 operates in the manner described below with reference to FIG. 4 .

4, a flow diagram of a method 400 in a mobile station 106 (e.g., MTC device 106) for implementing paging periods with a longer duration than in the prior art, according to another embodiment, have. The mobile station 106 includes at least one processor 116 and at least one memory 118 for storing processor executable instructions wherein at least one processor 116 interfaces with at least one memory 118 Processor executable instructions to cause the mobile station 106 to be operable in step 402 to determine if it is acceptable for the serving cell 110 _1b to remain in the camp-on state (e.g.). For example, the mobile station 106 may perform step 402 as follows: (1) based on a first DRX mode having a longer time period than the legacy second DRX mode, Wakes up (step 402a) to one hour (e.g., five slots before the long DRX period wakeup time); (2) tuning to the radio frequency of the beacon channel of serving cell 110 _1b (step 402b) and measuring the RSSI of the beacon channel from serving cell 110 _1b ; And (3) compare the threshold and the RSSI (step 402c). If the RSSI is greater than the threshold value, then it is acceptable for the serving cell 110 _1b to stay in the camp-on state. Otherwise, if RSSI is less than or equal to the threshold, then serving cell 110 _1b is not acceptable to stay in the camp-on state.

If the mobile station 106 determines that it is acceptable for the serving cell 110 _1b to stay in the camp-on state, then at step 404, the mobile station 106 transmits a first type of synchronization procedure (i.e., a short synchronization procedure) . For example, the mobile station 106 may execute a first type of synchronization procedure as follows: (1) reading a predetermined number of bursts from the received beacon channel of the serving cell 110 _1b (404a) ; (2) retrieve (404b) the TSC in the read bursts to confirm the cell identification of the serving cell (110 _1b ); (3) execute AFC operations and ATC operations (404c); And (4) scheduling for reception of the radio block 114 (404d). After step 404, the mobile station 106 executes step 406 and attempts to read the radio block 114 (e.g., CCCH block 114). If the mobile station 106 is able to read the received radio block 114 (e.g., if it can decode the radio block 114 and pass the CRC), then at step 406a, Performs an action based on the content in the radio block 114 (e.g., forwards the data to an upper layer); (2) scheduling the next wake-up time based on the first DRX mode (i.e., the long DRX mode) to perform the determination of step 402, and then entering the sleep mode. If the mobile station 106 can not read the received radio block 114 (e.g., can not decode the radio block 114 or pass the CRC), then at step 406b, Type synchronization procedure (i. E., A long synchronization procedure).

If the mobile station 106 determines that it is unacceptable for the serving cell 110 _1b to remain camped on during step 402 (the number "B" in FIG. 4 indicates the connection between step 402c and step 408), or mobile station 106 in a step 406 receives If you can not read the radio block 114, after step 408 while mobile station 106 may immediately perform a synchronization procedure of the second type and the new serving cell, thereby (110 _1a) (For example). For example, the mobile station 106 may execute a second type of synchronization procedure as follows: (1) perform an RSSI measurement on different frequencies (step 408a); (2) perform an FCCH search (step 408b); (3) performs an SCH search (step 408c); And (4) reads the BCCH information (step 408d). After step 408, the mobile station 106 determines in step 410 that up to N radio blocks 114 (e. G., In a new serving cell 110 _1a , CCCH blocks 114), where N > 1. If one of the N radio blocks 114 is successfully read (step 410a), then the mobile station 106 performs (1) an action based on the content of one radio block read out of the N radio blocks, and Schedules the next wake-up time based on the first DRX mode to perform the determination of step 402, and then enters a sleep mode (3). Otherwise, if none of the N radio blocks 114 have been successfully read (step 410b), then the mobile station 106 may (1) initiate a first type of synchronization operation (step 408) , And then (2) enter the sleep mode. ≪ RTI ID = 0.0 > The method 400 is further described below.

Once a long DRX period has been established, the mobile station 106 may initiate some limited initial check and sync up operations on its nominal long DRX paging block 114 (E.g., determined according to the DRX wakeup time) will only wake up as early as 5 slots, for example, than scheduled to be received from that serving cell 110 _1b (e.g.). The mobile station 106 will verify by this that it has already camped on the same serving cell 110 _1b when it has finally successfully executed these limited operations and it is already in a synchronized state. When limited operations are performed, serving cell 110 _1b may not be actually the highest cell at that point, but if mobile station 106 is still synchronized with serving cell 110 _1b , then mobile station 106 will proceed . The steps corresponding to these limited operations are as follows:

(1) tunes to the radio frequency (RF) of the beacon frequency of the serving cell and measures the RSSI thereon (step 402b).

(2) compares and determines if the RSSI of the serving cell 110 _1b is still higher than the threshold value (step 402c).

(3) If the outcome of step 2 is YES, this indicates that the mobile station 106 can continue to its current serving cell 110 _1b and perform the following:

a. If the mobile station 106 is to retrieve the number of TSCs in any received normal bursts (i.e., the cell ID has not changed since the last time the mobile station 106 successfully performed a limited set of operations) (Step 404a), performs a short sync up procedure (steps 404a and 404b), performs frequency and time correction (step 404c), and then schedules a CCCH read And schedules the reading of its nominal paging block 114 to be determined (step 404d).

b. If the CCCH reading is successful (i.e., the valid radio block 114 is read), then the mobile station 106 acts accordingly and schedules the next wake-up time according to the long DRX mode, The mobile station 106 will wake up as early as a few TSs (e.g., 5 TS) to perform limited initial check and sync up operations (steps 402 and 404).

4. If the CCCH reading of step 3a is not successful (i.e. no valid radio block 114 is read) or if the result of step 2 is no, then this indicates that current cell 110 _1b is not suitable for signal reception The mobile station 106 immediately executes (step 408) the initial cell search method (i.e., the second synchronization procedure, the long synchronization procedure) (step 408), thereby causing the new serving cell 110 _1a (For example), and (2) there is a maximum of N paging blocks 114 in the new serving cell 110 _1a , determined according to its short DRX mode (i.e., legacy DRX mode) on the CCCH, for example , Where N may have a default value (e.g., 2), or may be transmitted as part of the system information on the BCH of the new serving cell 110 _1a (step 410).

This is done by managing the cells 110 _1a , 110 _1b ... 110 _1x , 110 _2a , 110 _2b ... 110 _2x , and 110 _na , 110 _nb ... 110 _{nx in the} applicable paging area 113 Each of the BSSs 104 ₁ , 104 _{2 ...} 104 _n is connected to a respective cell 110 _{1 a} , 110 _1b ... 110 _1x , 110 _2a , 110 _2b ... 110 _{2x of the} paging area 113, 110 _na , 110 _nb ... 110 _nx (E.g., radio block 114, CCCH block 114) in accordance with the long DRX mode in the long DRX mode and after determining that the corresponding page response 115 has not been received, It is determined after the initial page did not receive a page response 115 to the (114) "X" of these cells according to the short DRX mode, starting from the second _{(110 1a, 110 1b ... 110} 1x, 110 2a, 110 2b ... 110 _2x , and 110 _na , 110 _nb ... 110 _nx , where 'X' is the number of times the mobile station 106 And reflects the amount of time required to execute the initial cell search method (i.e., the second synchronization procedure, the long synchronization procedure). A detailed description of (e.g., BSS 104 ₁ ) implementing this particular functionality is described below with reference to steps 502, 504, and 512 (i.e., shown as " .

5. After scheduling and successfully reading the radio block 114 in one of the top 'N' nominal short DRX mode paging blocks 114, the mobile station 106 then moves to the content of the corresponding radio block 114 And then proceeds to Slip Pro after scheduling the next wake up according to the long DRX mode (step 410a). Otherwise, the mobile station 106 schedules the next wakeup according to the long DRX mode (step 410b), but wakes up much earlier (e.g., 3 seconds to 5 seconds) before its nominally long DRX paging block And again execute the initial cell search method (i.e., the second synchronization procedure, the long synchronization procedure) as described above for step 408.

It should be appreciated that the number of short DRX mode paging blocks 114 being transmitted between the two long DRX mode paging blocks 114 is expected to be quite large because it is assumed that the mobile station 106 is in a new serving cell Even if it reads three or four short DRX mode paging blocks 114 in the mobile station 110 _1a (for example), it is in a time period during which the mobile station 106 is spanning the long DRX mode cycle using the legacy DRX mode It will still show a dramatic reduction in the total number of paging blocks 114 read as compared to what was read over. This repeated transmission of paging blocks over a short interval (as defined by the legacy DRX mode) after a long DRX paging cycle allows the mobile station 106 to successfully transmit a paging message 114 that it could not read within its nominal paging block Decoding. When long DRX is adopted in the system, then the paging cycle will be very long. Thus, in such a case, if the mobile station 106 (i. E., The device) misses the paging message transmitted in its nominal paging block 114, then ideally the mobile station 106 will receive the next paging message (E.g., one hour or more based on a long DRX period). As such, by reading one or more paging blocks 114 over a short interval (defined by the legacy DRX mode) that occurs after the nominal paging block 114, the mobile station 106 (i.e., the device) There is no need to wait for the next paging block that occurs in the long DRX period.

In addition, how much time the mobile station 106 needs to execute the initial cell search method (i.e., the second synchronization procedure, the long synchronization procedure) is determined by the BSS 104 ₁ , 104 _{2 ...} 104 _n determines that it has not received a response 115 to the initial page 114 and determines how long to wait after starting to transmit up to the maximum of N 'iterations of the initial page 114 in accordance with the short DRX mode It should be understood that it is. In addition, if performing an initial cell search method (i.e., a second synchronization procedure, a long synchronization procedure) results in the mobile station 106 winding up in a different routing area, then this also means that the mobile station 106 may be in a different paging Region, in which case the mobile station 106 will not receive any of the highest 'N' repeated pages 114, but this will not happen very often.

In view of the above description with reference to FIGS. 2-4, one of ordinary skill in the art will appreciate that the present invention may utilize two configuration-long and short DRX modes, where the long DRX mode is a new, While the short DRX mode is legacy mode. It may be several different options for configuration switching between long and short DRX modes, for example some options are described below:

1. For long DRX enabled devices, the core network node 102 may change paging iterations and duration if the paging response 115 is not received after an amount of X time.

2. If the mobile station 106 loses synchronization while reading the paging message 114 (radio block 114), the mobile station 106 may: (a) receive an indication of non-reception of the paging message 114 117) to a BSS (104-core, when sent to the network node 102, and a core network node 102 has received is displayed, since the core network node 102 BSS (104 ₁₎ (for example) ₁ can quickly transmit a message containing the information needed to generate and transmit a wireless block containing the paging message 114 on the air interface or (b) send an indication to the BSS 104 ₁ , (For example), which would normally keep the paging message 114 for a slightly longer period of time than the time the BSS 104 ₁ would hold for DRX-enabled devices (i.e., conventional mobile stations) A special indication 117 from the mobile station 106, Upon reception, so that after the BSS (104 ₁₎ to retransmit a page 114, instead of involving the core network node (102). A detailed description of BSS 104 ₁ (e.g.,) implementing this particular functionality is described below with respect to stages 502, 504, 506, and 510 of FIG. 5 (i.e., Display).

3. The BSS 104 ₁ (for example) may be used for a longer period of time than the BSS 104 ₁ tracks a radio block (paging message) broadcast to a normal mobile station (i.e., a long DRX enabled device) (E.g., keeps its record) paging messages 114 for the mobile station 106 (i. E., The long DRX enabled device 106) for a period of time. In addition, the BSS 104 ₁ after sending the paging message 114 maintains a trace to see if a paging response 115 is received from a particular mobile station 106. If the BSS 104 ₁ does not receive a paging response 115 from the mobile station 106 after an amount of X hours, then the BSS 104 ₁ may then send the paging response 115 without carrying the core network node 102 (e.g., SGSN 102) It may resend the page message 114 itself. A detailed description of BSS 104 ₁ (e.g., implementing this particular functionality) may be found in reference to steps 502, 504, 506, and 508 (i.e., " .

5, there is a flow diagram of a method 500 in a BSS 104 ₁ (e.g.) for implementing paging periods with a longer duration than in the prior art according to different implementations. The BSS 104 ₁ includes at least one processor 120 and at least one memory 122 for storing processor executable instructions wherein at least one processor 120 is interfaced with at least one memory 122, Processor executable instructions to cause the BSS 104 ₁ to communicate with the radio block 114 (e.g., paging block 114, CCCH block 114, paging message 114) for the mobile station 106 (see also Figure 1) The BSS 104 ₁ is operable in step 502 to receive from the core network node 102 a message 111 containing information needed to generate and transmit on the air interface do. The BSS 104 ₁ may additionally determine in step 504 not to be in the legacy second DRX mode in the one or more cells 110 _1a , 110 _1b ... 110 _1x in the paging area 113 of the mobile station 106, (Broadcast) the radio block 114 according to a first DRX mode, wherein the first DRX mode has a longer time period than the legacy second DRX mode. In accordance with the portion labeled "one embodiment" of the flowchart, the BSS 104 _{1 transmits} , after step 504, the BSS 104 ₁ to another mobile station (i.e., a long DRX capable mobile station) in accordance with the legacy second DRX mode Lt; / RTI > is operable in step 506 to track the radio block 114 that is transmitted in accordance with the first DRX mode to the mobile station 106 for a longer period of time than to track the radio block to be transmitted. The BSS 104 ₁ at step 508 may then determine that the paging response 115 has not been received from the mobile station 106 and transmit the message to the mobile station 106 without involving the core network node 102 after a predetermined period of time. Lt; RTI ID = 0.0 > 114 < / RTI > Steps 502, 504, 506, 508 and 510 correspond to the mobile station 106 operation described above with respect to FIG. Alternatively, the BSS 104 ₁ at step 510 may receive the indication 117 from the mobile station 106 indicating the non-reception of the radio block 114, without involving the core network node 102 It will retransmit the radio block 114 to the mobile station 106. In accordance with the portion labeled "Alternative Embodiment" in the flow chart, the BSS 104 ₁ after step 504 determines if the BSS 104 ₁ has received the paging response 115 from the mobile station 106, After a predetermined time, to repeatedly transmit the radio block 114 in accordance with the legacy second DRX mode up to a maximum of N times in one or more cells 110 _1a , 110 _1b ... 110 _1x of the paging area 113 512 < / RTI > Steps 502, 504, and 512 correspond to the mobile station 106 operations described above with reference to FIG.

Referring to FIG. 6, there is a flow diagram of a method 600 at a core network node 102 for implementing paging periods with a longer duration than in the prior art, according to an embodiment. Core network node 102 includes at least one processor 124 and at least one memory 126 for storing processor executable instructions wherein at least one processor 124 includes at least one memory 126, To execute processor executable instructions to enable the core network node to identify in step 602 that the mobile station 106 is configured in accordance with the first DRX mode and not in the second DRX mode, And has a longer time period than the legacy second DRX mode. For example, the core network node 102 may use the information contained in the registration related NAS signaling (step 602a) or (2) use the subscription information associated with the mobile station 106 (step 602b) The core network node 102 may obtain the subscription information from the HLR 108. The core network node 102 may be configured to be configured according to the first DRX mode rather than the legacy second DRX mode based on the first DRX mode. In step 604, the core network node 102 is operable to receive the downlink payload 112 for the mobile station 106. [ Upon receipt of the downlink payload 112, a core network node 102 cells (in the paging area 113 executes step 606, and _{110 1a, 110 1b ... 110 1x} , 110 2a, 110 2b. 104 _{2, ...} 104 _n ) that manages the mobile station 106 in accordance with the first DRX mode to the BSSs 104 ₁ , 104 _{2 ...} 104 _n that manage the mobile station 106, ... 110 _2x , and 110 _na , 110 _nb ... 110 _nx . (111) containing information needed to generate and transmit on the air interface 114 (e.g., paging block 114, CCCH block 114, page message 114, paging notification 114) ). After step 606, the core network node 102 executes step 608 and changes the duration (periodicity) of sending the messages 111 to the BSSs 104 ₁ , 104 ₂ ... 104 _n , Results in the transmission of radio blocks 114 to mobile station 106 when paging response 115 is not received from mobile station 106 for a predetermined amount of time. Alternatively, after step 606, the core network node 102 may execute step 610, wherein upon receiving from the mobile station 106 an indication 117 indicating a non-receipt of the radio block 114, the core network node 102 102 retransmits the message to the BSSs 104 ₁ , 104 ₂ ... 104 _n , which results in retransmission of the radio block 114 for the mobile station 106. The mobile station 106 may be able to transmit the indication 117 when the mobile station 106 receives the radio block 114 but loses synchronization so that the mobile station 106 does not end up decoding the radio block 114 do.

It should be appreciated by those of ordinary skill in the art that the disclosed techniques may result in a large power saving benefit for the mobile station 106. For example, if the legacy DRX period is 10 minutes, the new long DRX period is 1000 minutes, and the observation period for battery energy savings at the mobile station 106 is 3 days (i.e., normal battery back time), the energy saving ratio is approximately 3,000 times . Detailed calculations are provided below in Table 1.

DRX Cycle Legacy (in minutes) = 0.25 min
DRX New cycle (in minutes) = 1000 min
Observation period = 3 days = 4320 min Power consumption for each CCCH read = PC_ccch (uJ) = 400 Power consumption for each BSIC reading = PC_bsic (uJ) = 200 Power consumption for reading each BA list = PC_ba (uJ) = 600 Power consumption for 5 RSSI readings for 8 neighboring cells = PC_rssi (uJ) = 1000 Power consumption for each short sync up procedure = PC_short_sync (uJ) = 30 Power consumption for each BSIC reading = PC_long_sync (uJ) = 10000 Probability of first CCCH failure = 40% = 0.4 Occurrence of CCCH readings in the observation period Occurrence of BSIC reading in the observation period Occurrence of BA reading in the observation period Occurrence in observation period The occurrence of short sinks in the observation period The occurrence of a long sync in the observation period Occurrence of CCCH readings in the observation period 4.32
[Using the proposed long DRX method with a DRX cycle of 1000 minutes] 0 0 0 2.592
1.728
4.32
17280
[Using a legacy DRX method with a 0.25 minute DRX period] 8640
8640
51840

Legacy power consumption (mJ) 65664000 New Power Consumption (mJ) 19085.76 Power saving ratio (legacy / new) 3440.470801

In the normal scenarios, most of the time, the mobile station 106 does not have a short synchronization procedure (i.e., a short sync up) because the signal strength of the serving cell serving cell 110 _1b (e.g.) ). This will help to reduce (i.e., preserve) battery power as mobile station 106 will avoid having to perform dormant mode tasks most of the time. The following are some additional exemplary benefits of the disclosed techniques:

 (1) The mobile station 106 (and other similar devices 106) will stay in sleep mode for an extended period of time.

 (2) Typically, a mobile station needs to wake up to perform various tasks related to idle mode that are not required by the disclosed techniques. In the disclosed techniques, the mobile station 106 will only wake up in the DRX cycle , Will do what is required as discussed above with reference to Figures 2-4. This increases the sleep duration and also saves (i.e., preserves) the battery power of the mobile station 106.

(3) The power saving ratio between the conventional method and the newly proposed method is very great as described in Table 1.

(4) The mobile station 106 does not need to perform periodic RSSI measurements, BSIC conf / re-conf, and BCCH reads according to a fixed minimum periodicity. Therefore, the mobile station 106 does not need to wake up and perform periodic tasks according to a fixed minimum periodicity, and instead the mobile station 106 will only wake up in the DRX period. Thus, the duration of the DRX cycle is dependent on the need to support fixed tasks requiring a minimum execution periodicity due to the introduction of a short sync up procedure and the removal of some idle mode cell reselection related tasks Which will usually no longer be significantly affected or limited, either.

 (5) The MTC devices 106 (or sensor type devices) will be helpful if the battery power conversation is particularly important.

(6) The mobile station 106 performs the initial cell search method immediately and then detects the RRSI on the new serving cell 110 _1a (e.g., by detecting using limited initial check and sink-up operations) And then waiting for up to N iterations of the initial page 114 using the short DRX mode at the new serving cell 110 _1a , as shown in Figure 4, And may continue to receive the initial page 114 missed on the nominal long DRX mode paging block. This is because the delivery of the payload 112 is not generally time-critical, but it may still be part of the contracted quality of service for a given MTC application and should still be performed within a time period spanned by a long DRX cycle It can be of importance for the case of

 (7) Consumption of energy by the mobile station 106 is reduced while in the idle mode, which leads to a significant reduction in the rate at which the mobile station 106 consumes battery power.

The above described mobile station 106, core network node 102, BSSs 104 ₁ , 104 ₂ ... 104 _n , and the various methods 200, 300, and 400 of the present invention may also include one or more of the following features You can have:

1. A method for reducing power usage at a terminal or mobile station (106) includes waking up and performing synchronization operations in accordance with a long DRX period.

1A. The method of feature 1 further comprises the steps of, at every wake-up from the DRX sleep mode, the mobile station 106 first measures the RSSI of the previously camped cell and compares this to the threshold value, Lt; RTI ID = 0.0 > or < / RTI >

1B. In the method of feature 1A, if the RSSI of the previously camped cell is greater than the threshold, then the mobile station 106 assumes that it is still connected to the earlier cell, and based on the result, Up or long sync-up of the < / RTI >

1C. In the method of feature 1, in a long DRX period, periodic RSSI measurements, BSIC conf / re-conf, BCCH reads, AFC and similar operations are delayed or deferred to reduce battery power.

2. The method of reducing battery usage at the mobile station 106 comprises performing a faster sync up wherein the mobile station 106 reads any normal burst and determines a frequency using a known TSC data in the burst Performs synchronization, time synchronization, and then prepares for CCCH reception, where this short sync up takes a small number of time slots.

2A. In the method of feature 2, the mobile station 106 does not have to wait for the FCCH.

3. A method of reducing battery usage at the mobile station 106 includes performing a long sync up wherein the mobile station 106 is able to perform CCCH decoding as if it were detected by the algorithm or procedure described herein And performs the same operations as those performed after power-on when the mobile station 106 failed or lost the previous cell.

Also, while the cellular network 100 is shown and described herein as being configured in accordance with the GSM standard, the cellular network 100 and other components of the present invention may be implemented in accordance with UTRA, E-UTRA or any other wireless access technology Where the reachability of the wireless devices 106 among them has historically been established with the assumption that all transmissions of the downlink packet data payload require somewhat lower latency in the area of a few seconds Respectively. Finally, it should be understood that the present invention may be any type of device, if not limited to, mobile stations 106 featuring MTC devices.

 Although a plurality of embodiments of the present invention are shown in the accompanying drawings and described in the foregoing detailed description, it is to be understood that the invention is not limited to the disclosed embodiments, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the following claims Rearrangement, modification, and substitution are possible.

Claims (34)

A mobile station (106) configured to implement paging periods in a cellular network (100)
At least one processor (116); And
At least one memory 118 for storing processor executable instructions,
Wherein the at least one processor interfaces with the at least one memory to execute the processor executable instructions whereby the mobile station:
Determine (202, 302, 402) that the serving cell (110 _1b ) in the cellular network is acceptable to stay in a camped-on state;
If the determination is that it is acceptable for the serving cell to remain camped on, then a first type of synchronization procedure is performed (204a, 306, 404) and a radio block received in accordance with the first DRX mode is read (204b, 306, 406) the first DRX mode has a longer time period than the legacy second DRX mode; And
If the result of the determination is that it is not acceptable for the serving cell to remain camped on or the mobile can not read (208, 306b, 406b) the received radio block, then a second type of synchronization procedure (208a, 310, 408) and also attempting to read another radio block, the first type of synchronization procedure having a shorter duration than the second type of synchronization procedure,
Mobile station. The mobile station according to claim 1,
(206a, 306a, 406a) based on the contents of the received radio block if the mobile station is capable of reading (206, 306a, 406a) the received radio block; (2) scheduling (206b, 306a, 406a) a next wake-up time based on the first DRX mode to determine if it is acceptable for the serving cell to remain camped, and (3) Lt; RTI ID = 0.0 > 206c, 306a, < / RTI &
Mobile station. The mobile station according to claim 1,
If the mobile station is capable of reading (210, 312a) the another received radio block, (1) perform an action (210a, 312a) based on the content of the another received radio block, (2) (210b, 312a), and then (3) enters a sleep mode (210c, 312a) based on the first DRX mode to determine whether it is acceptable to stay in the camp-on state ; And
If the mobile station is unable to read (212, 312b) the another received radio block, then (1) it schedules the next wakeup time based on the first DRX mode to execute the second type of synchronization procedure (212a, 312b), and then (2) enter the sleep mode (212b, 312b)
Mobile station. 2. The method of claim 1, wherein the mobile station is operable to determine whether the serving cell is acceptable to stay in the camp-on state,
(302a, 402a) at a predetermined first time before the start time of the paging cycle based on the first DRX mode;
Tune (302b, 402b) to the radio frequency of the serving cell's beacon channel and measure the RSSI of the serving cell's beacon channel; And
Compare the RSSI to a threshold value (302c, 402c); if the RSSI is greater than the threshold, then the determination result is that the serving cell is acceptable to stay in the camp-on state; and if the RSSI is greater than the threshold Then the decision result is that the serving cell is not acceptable to stay in the camp-on state.
Mobile station. 2. The method of claim 1, wherein the first type of synchronization procedure comprises:
Reading (304a, 404a) a predetermined number of bursts from the received beacon channel of the serving cell;
Retrieving (304b, 404b) a TSC in the read bursts to confirm cell identification of the serving cell;
Executing AFC operations and ATC operations (304c, 404c); And
And scheduling for reception of the wireless block (304d, 404d)
Mobile station. 2. The method of claim 1, wherein the mobile station is further configured to determine that the determination result indicates that it is not acceptable for the serving cell to remain camped on, or that the mobile station can not read (208, 306b, 406b) (308) at a predetermined second time before the start time of the next paging cycle based on the first DRX mode to perform the second type of synchronization procedure
Mobile station. 2. The method of claim 1, wherein the second type of synchronization procedure comprises:
Performing (310a, 408a) RSSI measurements on different frequencies;
Performing FCCH search (310b, 408b);
Performing an SCH search (310c, 408c); And
Reading the BCCH information (steps 310d, 408d)
Mobile station. 2. The method of claim 1, wherein the mobile station is further configured to: if the determination result indicates that it is unacceptable for the serving cell to remain in the camp-
Executing (408) the second type of synchronization procedure;
Scheduling (410) reads of up to N radio blocks to be received according to the legacy second DRX mode, where N>1; And
If one of the N radio blocks is successfully read (410a), (1) performs an action on the basis of the read one of the N radio blocks, (2) the serving cell is in a camp- Scheduling a next wake-up time based on the first DRX mode to determine if it is acceptable to stay, and then (3) entering a sleep mode; or
If none of the N radio blocks are successfully read (410b), (1) scheduling a next wakeup time based on the first DRX mode to execute the second type of synchronization procedure, and (2) operable to enter the sleep mode
Mobile station. The method of claim 1, wherein the wireless block is one of a paging block, a CCCH block, a paging message,
Mobile station. A method (200, 300, 400) in a mobile station (106) for implementing paging periods in a cellular network (100)
Determining (202, 302, 402) if the serving cell (110 _1b ) in the cellular network is acceptable to stay in the camp-on state;
If the determination is that it is acceptable for the serving cell to remain camped on, then a first type of synchronization procedure is performed (204a, 304, 404) and a wireless block received in accordance with the first DRX mode Attempting to read (204b, 306, 406) the first DRX mode having a longer time period than the legacy second DRX mode; And
If the result of the determination is that it is not acceptable for the serving cell to remain camped on or the mobile can not read (208, 306b, 406b) the received radio block, then a second type of synchronization procedure (208a, 310, 408) and also attempting to read another radio block, the first type of synchronization procedure having a shorter duration than the second type of synchronization procedure,
≪ / RTI > 11. The method of claim 10, wherein if the mobile station is capable of reading (206, 306a, 406a) the received radio block, then the mobile station may: (1) ≪ / RTI > (2) scheduling (206b, 306a, 406a) a next wake-up time based on the first DRX mode to determine if it is acceptable for the serving cell to remain camped, and (3) Lt; RTI ID = 0.0 > 206c, 306a, < / RTI &
Way. 11. The method of claim 10,
If the mobile station is capable of reading (210, 312a) the another received radio block, (1) perform an action (210a, 312a) based on the content of the another received radio block, (2) (210b, 312a), and then (3) enters a sleep mode (210c, 312a) based on the first DRX mode to determine whether it is acceptable to stay in the camp-on state ; And
If the mobile station is unable to read (212, 312b) the another received radio block, then (1) it schedules the next wakeup time based on the first DRX mode to execute the second type of synchronization procedure (212a, 312b), and then (2) enter the sleep mode (212b, 312b)
Way. 11. The method of claim 10, wherein the step of determining whether the mobile station is acceptable for the serving cell to stay in the camp-
Waking up (302a, 402a) at a predetermined first time before a start time of a paging cycle based on the first DRX mode;
Tuning (302b, 402b) to the radio frequency of the serving cell's beacon channel and measuring the RSSI of the serving cell's beacon channel; And
Comparing the RSSI to a threshold value (302c, 402c); if the RSSI is greater than the threshold, then the determination result is that the serving cell is acceptable to stay in the camp-on state; and if the RSSI is greater than the threshold Value, the determination result is that it is unacceptable for the serving cell to remain in the camp-on state.
Way. 11. The method of claim 10, wherein the first type of synchronization procedure comprises:
Reading (304a, 404a) a predetermined number of bursts from the received beacon channel of the serving cell;
Retrieving (304b, 404b) a TSC in the read bursts to confirm cell identification of the serving cell;
Executing AFC operations and ATC operations (304c, 404c); And
And scheduling for reception of the wireless block (304d, 404d)
Way 11. The method of claim 10, wherein the mobile station is further configured to determine that the determination result indicates that it is unacceptable for the serving cell to remain camped on or that the mobile station can not read (208, 306b, 406b) (308) at a predetermined second time before the start time of the next paging cycle based on the first DRX mode to perform the second type of synchronization procedure
Way. 11. The method of claim 10, wherein the second type of synchronization procedure comprises:
Performing (310a, 408a) RSSI measurements on different frequencies;
Performing FCCH search (310b, 408b);
Performing an SCH search (310c, 408c); And
(310d, 408d) of reading the BCCH
Way. 11. The method of claim 10, wherein the mobile station is further configured to: if the determination result indicates that it is unacceptable for the serving cell to remain in the camp-
Executing (408) the second type of synchronization procedure;
Scheduling (410) reads of up to N radio blocks to be received according to the legacy second DRX mode, where N>1; And
If one of the N radio blocks is successfully read (410a), (1) performs an action based on the one content read out of the N radio blocks, (2) the serving cell remains in the camp-on state Scheduling a next wake-up time based on the first DRX mode to determine if the first DRX mode is acceptable, and then (3) entering a sleep mode; or
If none of the N radio blocks are successfully read (410b), (1) scheduling a next wakeup time based on the first DRX mode to execute the second type of synchronization procedure, and (2) operable to enter the sleep mode
Way. 11. The method of claim 10, wherein the wireless block is one of a paging block, a CCCH block, a paging message, or a paging notification. A base station subsystem (BSS) 104 ₁ configured to implement paging periods for a mobile station 106 in a cellular network 100,
At least one processor (120); And
At least one memory 122 for storing processor executable instructions,
Wherein the at least one processor interfaces with the at least one memory to execute the processor executable instructions whereby the BSS further comprises:
From the core network node 102 in the cellular network, a message 111 containing information needed by the BSS to generate and transmit the radio block 114 for the mobile station on the air interface 502); And
Is operable to transmit (504) the radio block in accordance with a first DRX mode rather than a legacy second DRX mode at one or more cells (110 _1a , 110 _1b ... 110 _1x ) of the paging area of the mobile station, The first DRX mode has a longer time period than the legacy second DRX mode
BSS. 20. The method of claim 19,
Tracking (506) the radio block transmitted in the first DRX mode to the mobile station for longer than the BSS tracks a radio block transmitted to another mobile station in accordance with the legacy second DRX mode; And
Retransmitting the wireless block to the mobile station without involving the core network node at a determination 508 that the paging response 115 has not been received from the mobile station after a predetermined time; or
Further operable to retransmit the radio block to the mobile station without involving the core network node when receiving (510) an indication (117) from the mobile station indicating a non-reception of the radio block
BSS. 20. The method of claim 19,
Repeatedly sending the radio block up to a maximum of N times in one or more cells of the paging area after a predetermined time at a determination 512 that the paging response 115 has not been received from the mobile station, It is repeatedly transmitted up to N times in accordance with the legacy second DRX mode
BSS. 20. The method of claim 19, wherein the wireless block is one of a paging block, a CCCH block, a paging message, or a paging notification. A method (500) in a BSS (104 ₁ ) for implementing paging periods for a mobile station (106) in a cellular network (100)
Receiving, from a core network node (102) in the cellular network, a message (111) containing information needed by the BSS to generate and transmit a radio block (114) for the mobile station on a radio interface (502); And
Transmitting (504) the radio block in accordance with a first DRX mode rather than a legacy second DRX mode in one or more cells (110 _1a , 110 _1b ... 110 _1x ) of the paging area of the mobile station, Mode has a longer time period than the legacy second DRX mode -
≪ / RTI > 24. The method of claim 23,
Tracking (506) the radio block that is transmitted according to the first DRX mode to the mobile station for a period longer than the BSS tracking a radio block that is legacy transmitted to another mobile station according to the second DRX mode; And
Retransmitting the radio block to the mobile station without involving the core network node after a predetermined time at a determination 508 that the paging response 115 has not been received from the mobile station; or
(510) indicative of non-receipt of the radio block from the mobile station (510), retransmitting the radio block to the mobile station without involving the core network node
≪ / RTI > 24. The method of claim 23,
Repeatedly sending the radio block up to a maximum of N times in one or more cells of the paging area after a predetermined time at a determination 512 that the paging response 115 has not been received from the mobile station, It is repeatedly transmitted up to N times according to the legacy second DRX mode -
≪ / RTI > 24. The method of claim 23, wherein the wireless block is one of a paging block, a CCCH block, a paging message, or a paging notification. A core network node (102) configured to implement paging periods for a mobile station (106) in a cellular network (100)
At least one processor (124); And
At least one memory 126 for storing processor executable instructions,
Wherein the at least one processor interfaces with the at least one memory to execute the processor executable instructions whereby the core network node comprises:
Identifying (602) the mobile station as being configured according to a first DRX mode rather than a legacy second DRX mode, the first DRX mode having a longer time period than the legacy second DRX mode;
Receive (604) a downlink payload 112 for the mobile station; And
Upon receipt 606 of the downlink payload cells in the paging area of the mobile station _{(110 1a, 110 1b ... 110} 1x, 110 2a, 110 2b ... 110 2x, and 110 _{na, nb} 110. ..110 to _nx) to one or more BSS to manage _{(104 1, 104 2 ... 104} n), a radio block 114 for the mobile station according to claim 1 wherein the DRX mode for transmitting over the air interface Operable to transmit a message (111) containing the required information
Core network node. 28. The method of claim 27,
(1) using information included in registration-related NAS signaling (602a), or (2) using subscription information associated with the mobile station (602b) for the first DRX mode during registration of the mobile station Further operable to identify the mobile station as being configured
Core network node. 28. The method of claim 27,
To change (608) the periodicity of transmitting messages resulting in the transmission of radio blocks to the mobile station when a paging response is not received from the mobile station for a predetermined amount of time
Core network node. 28. The core network node of claim 27, wherein the wireless block is one of a paging block, a CCCH block, a paging message, or a paging notification. CLAIMS: 1. A method (600) in a core network node (102) for implementing paging periods for a mobile station (106) in a cellular network (100)
Identifying (602) the mobile station as being configured according to a first DRX mode rather than a legacy second DRX mode, the first DRX mode having a longer time period than the legacy second DRX mode -;
Receiving (604) a downlink payload (112) for the mobile station; And
Upon receipt 606 of the downlink payload cells in the paging area of the mobile station _{(110 1a, 110 1b ... 110} 1x, 110 2a, 110 2b ... 110 2x, and 110 _{na, nb} 110. one or more BSS to manage _{..110 nx) (104 1, 104} 2 ... 104 n) for, transmitting a radio block 114 for the MS 106 according to claim 1 wherein the DRX mode on the radio interface, Transmitting a message (111) containing said information required to do so
≪ / RTI > 32. The method of claim 31,
(1) using information contained in registration-related NAS signaling (602a), or (2) using subscription information associated with the mobile station (602b) for the first DRX mode during registration of the mobile station Identifying the mobile station as being configured
≪ / RTI > 32. The method of claim 31,
Modifying (608) the periodicity of transmitting messages resulting in the transmission of radio blocks to the mobile station when a paging response is not received from the mobile station for a predetermined amount of time;
≪ / RTI > 32. The method of claim 31, wherein the wireless block is one of a paging block, a CCCH block, a paging message, or a paging notification.

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