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WO2024155215A1 - Gestion d'un dispositif sans fil campant sur une cellule au niveau d'un encombrement de cellules - Google Patents

Gestion d'un dispositif sans fil campant sur une cellule au niveau d'un encombrement de cellules Download PDF

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Publication number
WO2024155215A1
WO2024155215A1 PCT/SE2023/050044 SE2023050044W WO2024155215A1 WO 2024155215 A1 WO2024155215 A1 WO 2024155215A1 SE 2023050044 W SE2023050044 W SE 2023050044W WO 2024155215 A1 WO2024155215 A1 WO 2024155215A1
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WO
WIPO (PCT)
Prior art keywords
cell
duration time
wireless device
barring
barring timer
Prior art date
Application number
PCT/SE2023/050044
Other languages
English (en)
Inventor
Badawi YAMINE
Mattias BERGSTRÖM
Original Assignee
Telefonaktiebolaget Lm Ericsson (Publ)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telefonaktiebolaget Lm Ericsson (Publ) filed Critical Telefonaktiebolaget Lm Ericsson (Publ)
Priority to PCT/SE2023/050044 priority Critical patent/WO2024155215A1/fr
Publication of WO2024155215A1 publication Critical patent/WO2024155215A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/02—Access restriction performed under specific conditions
    • H04W48/06—Access restriction performed under specific conditions based on traffic conditions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information

Definitions

  • the present disclosure relates generally to a method and a wireless device for handling the wireless device camping on a cell handled by the network node at cell congestion.
  • the present disclosure further relates to methods and network nodes for handling one or more wireless devices camping on a cell handled by the network node at cell congestion.
  • the present disclosure further relates to computer programs and carriers corresponding to the above methods, devices and nodes.
  • the wireless device can be in different modes, aka states, with regards to connectivity to the network.
  • LTE Long Term Evolution
  • 4G 4 th Generation
  • the wireless device needs to establish a connection with the network. This is done via a Radio Resource Connection (RRC) establishment procedure. Once an RRC connection is established, the wireless device is in connected mode. When the wireless device does not have any data to send it transits to idle mode, which means that its RRC connection is broken. When communication is to take place again, the wireless device transits into connected mode, i.e. , a new RRC connection is established. It was discovered
  • inactive mode the RRC connection of the wireless device is not completely broken but it is rather suspended.
  • the inactive mode can therefore be said to be a mode in between connected mode and idle mode.
  • idle mode or inactive mode the wireless device is said to be camping on or in a cell in which geographical area it is situated.
  • a wireless device in connected mode is not camping on a cell. This is described in e.g., 3GPP TS 38.304 V 17.2.0, Chapter 4.1.
  • wireless devices residing in the cell are handled differently depending on the mode of each individual wireless device. For wireless devices in connected mode, different existing procedures may be executed to limit the number of devices. For example, the network node handling the congested cell might reject handovers of wireless devices coming from neighboring cells. For wireless devices that are camping on the congested cell, i.e., for wireless devices being in inactive mode or idle mode, another procedure can be executed to avoid traffic generated from these devices. This procedure is performed by preventing at least some of those wireless devices from trying to establish a connection with the congested cell, i.e. change to connected mode, for a certain time period. This disclosure deals with the handling of such UEs camping on a cell when the cell becomes congested.
  • a prior art method for handling a wireless device in 5G camping on a cell during congestion is described in 3GPP TS 38.331 , v16.10.0 dated 2022-09 [ref. 1], see e.g., Chapter 5.3.14.5.
  • the network node handling the cell changes the status of the cell to “barred” and broadcast to the wireless devices camping on this cell, barring information indicating restricted accessibility to the cell.
  • the barring information comprises a uac-BarringFactor P106600 and a uac-BarringTime, and an instruction to the wireless device to draw a random number 'rand 1 uniformly distributed in the range: 0 ⁇ rand ⁇ 1 .
  • the uac- BarringFactor is set by the network node to a number between 0 and 0.95, as described in page 670 of [ref. 1], If 'rand is lower than the value indicated by the uac-BarringFactor, the wireless device shall consider an access attempt as allowed. On the other hand, if 'rand is higher than the value indicated by the uac- BarringFactor, the wireless device shall consider an access attempt as barred.
  • the wireless device determines, based on the received barring information, whether it shall treat the cell as barred or not.
  • the wireless device determines that it shall treat the cell as barred
  • the wireless device is instructed to draw another random number “rand2" that is uniformly distributed in the range of 0 ⁇ rand2 ⁇ 1 .
  • the uac- BarringTime may be set by the network node to any of the following values ⁇ s4, s8, s16, s32, s64, s128, s256, s512 ⁇ , where “s” stands for seconds.
  • s stands for seconds.
  • rand2 the T390 timer will expire in different times for the different wireless devices camping on the cell to avoid many wireless devices trying to set up a connection to the cell at the same time.
  • the minimum and maximum values of the duration time for the T390 timer could be calculated as follows:
  • the maximum value of the T390 duration time corresponds to rand2 ⁇ 1 and to uac-BarringTime equal to s518, which will result in a T390 duration time of (0.7 +0.6 *1 ) *s512 ⁇ 665.6 seconds.
  • wireless P106600 device may be prevented from attempting to access the cell for a period that does not reflect the correct period of when the cell is barred. This has a negative impact of the service to the users and may also negatively impact efficient use of the network resources.
  • a method is performed by a wireless device camping on a cell handled by a network node of a wireless communication network, for handling the wireless device at cell congestion.
  • the method comprises receiving, from the network node, barring information indicating restricted accessibility to the cell, determining, based on the barring information, that the wireless device shall treat the cell as barred, and, in response to the determining, starting a barring timer having a duration time during which the wireless device shall treat the cell as barred.
  • the method further comprises receiving, from the network node, after the barring timer has started and before the barring timer has expired, information relating to a change of accessibility for the wireless device to the cell and adjusting the duration time of the barring timer in accordance with the information relating to the change of accessibility.
  • a method is provided that is performed by a network node of a wireless communication network for handling a plurality of wireless devices camping on a cell handled by the network node at cell congestion.
  • the method comprises, when determining that the cell is congested, broadcasting barring information to the plurality of wireless devices, the barring information indicating restricted accessibility to the cell for the plurality of wireless
  • the method further comprises, after the broadcasting of the barring information and before a duration time has expired when at least one of the plurality of wireless devices shall treat the cell as barred, broadcasting, to the plurality of wireless devices, information relating to a change of accessibility to the cell for the at least one of the plurality of wireless devices, the broadcasting of the information relating to changed accessibility enabling access attempts from the at least one of the plurality of wireless device to the cell to be received at a time point that is dependent on the information relating to the changed accessibility.
  • a wireless device configured for camping on a cell handled by a network node of a wireless communication network.
  • the wireless device is configured for handling the wireless device at cell congestion.
  • the wireless device comprises a processing circuitry and a memory. Said memory contains instructions executable by said processing circuitry, whereby the wireless device is operative for receiving, from the network node, barring information indicating restricted accessibility to the cell, determining, based on the barring information, that the wireless device shall treat the cell as barred, and, in response to the determining, starting a barring timer having a duration time during which the wireless device shall treat the cell as barred.
  • the wireless device is further operative for receiving, from the network node, after the barring timer has started and before the barring timer has expired, information relating to a change of accessibility for the wireless device to the cell, and adjusting the duration time of the barring timer in accordance with the information relating to the change of accessibility.
  • a network node configured to operate in a wireless communication network and configured for handling a plurality of wireless devices camping on a cell handled by the network node at cell congestion.
  • the network node comprises a processing circuitry and a memory.
  • Said memory contains instructions executable by said processing circuitry, whereby the network node is operative for, when determining that the cell is congested, broadcasting barring information to the plurality of wireless devices, the barring information indicating restricted accessibility to the cell for the plurality P106600 of wireless devices.
  • the network node is further operative for, after the broadcasting of the barring information and before a duration time has expired when at least one of the plurality of wireless devices shall treat the cell as barred, broadcasting, to the plurality of wireless devices, information relating to a change of accessibility to the cell for the at least one of the plurality of wireless devices, the broadcasting of the information relating to changed accessibility enabling access attempts from the at least one of the plurality of wireless device to the cell to be received at a time point that is dependent on the information relating to the changed accessibility.
  • FIG. 1 is a schematic diagram of a wireless communication network in which the present invention may be used.
  • FIG. 2 is a flow chart illustrating a method performed by a wireless device according to possible embodiments.
  • FIG. 3 is a flow chart illustrating a method performed by a network node according to possible embodiments.
  • FIG. 4 is a block diagram illustrating a wireless device in more detail, according to further possible embodiments.
  • FIG. 5 is a block diagram illustrating a network node in more detail, according to further possible embodiments.
  • a wireless device camping on a cell may be barred from trying to access the cell for a much shorter time than the cell congestion lasts, which means that the wireless device tries to access the cell and set up a connection when there is no connection available. This also results in bad user experience.
  • signaling resources in the cell are used in vain. Consequently, there is a need of an improved procedure for handling and controlling a wireless device camping on a cell during cell congestion.
  • Embodiments of the invention are built on the idea of letting the network node inform the wireless device of a change in accessibility to the cell for which the wireless device has a barring timer running.
  • information relating to a change of accessibility to the cell for which barring timers run is sent by the network node to the concerned wireless devices.
  • the information relating to changed accessibility may be information that the cell is not barred anymore or information indicating changed duration time of the barring timer, such as a change of uac-BarringTime.
  • the wireless device that has a barring timer running acts on this received information by adjusting the duration time of its barring timer.
  • the duration time of the barring timer is shortened.
  • the duration time of the barring timer is prolonged.
  • a longer barring time i.e. a longer uac-BarringTime
  • Fig. 1 shows a wireless communication network 100 comprising a network node 130 aka radio access network (RAN) node that is in, or is adapted for, wireless communication with one or more wireless devices 140, 145.
  • the network node 130 provides radio access in a cell 150 covering a geographical area.
  • RAN radio access network
  • the wireless communication network 100 may be any kind of wireless communication network that can provide radio access to wireless devices.
  • Example of such wireless communication networks are networks based on Global System for Mobile communication (GSM), Enhanced Data Rates for GSM Evolution (EDGE), Universal Mobile Telecommunications System (UMTS), Code Division Multiple Access 2000 (CDMA 2000), Long Term Evolution (LTE), LTE Advanced, Wireless Local Area Networks (WLAN), Worldwide Interoperability for Microwave Access (WiMAX), WiMAX Advanced, as well as fifth generation (5G) wireless communication networks based on technology such as New Radio (NR), and any possible future sixth generation (6G) wireless communication network.
  • GSM Global System for Mobile communication
  • EDGE Enhanced Data Rates for GSM Evolution
  • UMTS Universal Mobile Telecommunications System
  • CDMA 2000 Code Division Multiple Access 2000
  • LTE Long Term Evolution
  • LTE Advanced Long Term Evolution
  • WLAN Wireless Local Area Networks
  • WiMAX Worldwide Interoperability for Microwave Access
  • WiMAX WiMAX Advanced
  • the network node 130 may be any kind of network node that can provide wireless access to the one or more wireless devices 140, 145 alone or in combination with another network node.
  • Examples of network nodes 130 are a base station (BS), a radio BS, a base transceiver station, a BS controller, a network controller, a Node B (NB), an evolved Node B (eNB), a gNodeB (gNB), a Multi-cell/multicast Coordination Entity, a relay node, an access point (AP), a radio AP, a remote radio unit (RRU), a remote radio head (RRH) and a multistandard BS (MSR BS).
  • BS base station
  • radio BS a base transceiver station
  • BS controller a network controller
  • NB Node B
  • eNB evolved Node B
  • gNodeB gNodeB
  • Multi-cell/multicast Coordination Entity a relay node, an access point (AP), a radio
  • the one or more wireless devices 140, 145 may be any type of device capable of wirelessly communicating with the network node 130 using radio signals.
  • the one or more wireless devices 140, 145 may be a User Equipment (UE), a machine type UE or a UE capable of machine to machine (M2M) communication, a sensor, a tablet, a mobile terminal, a smart phone, a laptop embedded equipped (LEE), a laptop mounted equipment (LME), a USB
  • UE User Equipment
  • M2M machine to machine
  • P106600 dongle a Customer Premises Equipment (CPE), an Internet of Things (loT) device, etc.
  • CPE Customer Premises Equipment
  • LoT Internet of Things
  • Fig. 2 in conjunction with fig. 1 , describes a method performed by a wireless device 140 camping on a cell 150 handled by a network node 130 of a wireless communication network 100, for handling the wireless device 140 at cell congestion.
  • the method comprises receiving 201 , from the network node 130, barring information indicating restricted accessibility to the cell 150, determining 202, based on the barring information, that the wireless device 140 shall treat the cell 150 as barred, and, in response to the determining 202, starting 204 a barring timer having a duration time during which the wireless device 140 shall treat the cell 150 as barred.
  • the method further comprises receiving 206, from the network node 130, after the barring timer has started 204 and before the barring timer has expired, information relating to a change of accessibility for the wireless device 140 to the cell 150 and adjusting 208 the duration time of the barring timer in accordance with the information relating to the change of accessibility.
  • the barring information received from the network node may be an indication that a certain percentage of a plurality of wireless devices camping on the cell shall treat the cell as barred and an instruction to the plurality of devices to select a random number which will indicate whether the wireless device is within the percentage that shall treat the cell as barred.
  • the barring information may be an indication that a certain wireless device shall treat the cell as barred.
  • the barring information may be broadcast by the network node 130 in a System Information Block (SIB). That the wireless device 140 shall treat the cell 150 as barred may signify that the wireless device shall refrain from attempting to access the cell. When the barring timer has expired, the wireless device is instructed to treat the cell as not barred.
  • SIB System Information Block
  • the barring timer may be the T390 timer discussed in [Ref. 1]
  • the information received 206 from the network node 130 relating to a change of accessibility for the wireless cell may be broadcast by the network node 130 in a SIB.
  • the adjusting 208 of the duration time comprises restarting the barring timer. For example, in case there is any time left of the duration time of the barring timer when the duration time has been changed, the barring timer is restarted from that value.
  • the received 206 information relating to a change of accessibility is information that the cell 150 is not barred anymore for the wireless device 140.
  • the received 206 information relating to a change of accessibility is information indicating that the duration time of the barring timer is changed.
  • the information indicating that an input for determining the duration time of the barring timer is changed may be a changed parameter that the wireless device uses as input to determine the duration time of its barring timer.
  • the changed parameter may be a common time parameter mentioned in the next paragraph.
  • the information indicating that the duration time of the barring timer has changed may be a new value of the duration time of the barring timer.
  • the received 206 information relating to a change of accessibility is information indicating that an input for determining the duration time of the barring timer is changed.
  • the barring information received 201 from the network node 130 comprises a common time parameter for determining the duration time of the barring timer, the common time parameter intended to be used by a plurality of wireless devices 140, 145 camping on the cell including the wireless device 140. Further, the method comprises determining 203 the duration P106600 time of the barring timer based on the received common time parameter and a random parameter.
  • the common time parameter may be the uac-BarringTime mentioned in [Ref. 1], The random parameter is set randomly for the wireless device.
  • the random parameter may be the “rand2” mentioned.
  • the received 206 information relating to a change of accessibility for the wireless device 140 to the cell 150 is information indicating that the common time parameter has changed. Further, the duration time of the barring timer is adjusted 208 in accordance with the changed common time parameter.
  • the duration time of the barring timer is adjusted 208 by reducing the duration time of the barring timer.
  • the duration time of the barring timer is reduced by a certain value.
  • the certain value may be common to the plurality of wireless devices 140, 145 camping on the cell 150 including the wireless device 140, i.e., the certain value is the same to each of the plurality of wireless devices.
  • the certain value is proportional to the common time parameter or proportional to a change of the common time parameter.
  • a remaining duration time of the barring timer is left.
  • the duration time of the barring timer is then reduced by reducing the remaining duration time with a certain value.
  • the wireless device determines that that the cell is not barred.
  • the barring timer is restarted from the remaining duration time reduced by the certain value.
  • the timer is restarted from this shorter remaining duration time.
  • the wireless devices that have duration time remaining after it being reduced will be allowed to attempt to access the cell at different time points, whereby a rush of attempts at the approximately the same time is avoided.
  • a reason to reduce the remaining duration time may be that the information received 206 from the network node was information that the cell is not barred anymore.
  • the wireless devices will be able to try to access the cell earlier than without changing the barring timer, but also it is avoided that all of the plurality of wireless devices camping on the cell tries to access the cell simultaneously.
  • a remaining duration time of the barring timer is left, wherein the duration time of the barring timer is reduced 208 either by dividing the remaining duration time with a factor larger than 1 or by multiplying the remaining duration time with a factor smaller than 1 so as to achieve a shorter remaining duration time that is shorter than the remaining duration time.
  • the method comprises restarting the barring timer from the shorter remaining duration time.
  • the factor by which the remaining duration time of the barring timer is divided or multiplied has a value that is common to a plurality of wireless devices 140, 145 camping on the cell 150 including the wireless device 140.
  • the remaining duration times of all the plurality of wireless devices are divided or multiplied by the same value, which results in shortened barring times for all the plurality of wireless devices that have remaining duration times when receiving the information relating to change of accessibility to the cell.
  • a remaining duration time of the barring timer is left. Further, the method comprises determining 207 whether reducing the remaining duration time of the barring timer by a certain value would result in that the barring timer has expired. When the determining 207 results in that the barring timer would not have expired, the adjustment 208 of the duration time of the barring timer is performed by reducing the remaining duration time of the barring timer by the certain value and by restarting the barring timer from the reduced remaining duration time.
  • the duration time of the barring timer is adjusted 208 by restarting the barrier timer from the remaining duration time.
  • a value of the random parameter used in the determining 203 of the duration time of the barring timer is randomly taken from within a number span of 0 to x.
  • the duration time of the barring timer is adjusted 208 by being redetermined based on the common time parameter and a second random parameter, which value is randomly taken from within a number span of 0 to y, where y is lower than x.
  • This embodiment is especially applicable to the information relating to changed accessibility being information indicating a shortened duration time or that the cell is not barred anymore.
  • the mean duration time for the plurality of wireless devices will be shorter after the redetermination than the before the redetermination, at least when y is selected sufficiently low in relation to x.
  • throughput is increased in total and the risk of congestion due to simultaneous access attempts to the cell is
  • the second random parameter may be called “rand 3”.
  • the value of y may be lower than 1 .
  • the value of x may be 1 or lower than 1 .
  • Fig. 3, in conjunction with fig. 1 describes a method performed by a network node 130 of a wireless communication network 100 for handling a plurality of wireless devices 140, 145 camping on a cell 150 handled by the network node 130 at cell congestion.
  • the method comprises, when determining that the cell is congested, broadcasting 302 barring information to the plurality of wireless devices 140, 145, the barring information indicating restricted accessibility to the cell 150 for the plurality of wireless devices 140, 145.
  • the method further comprises, after the broadcasting of the barring information and before a duration time has expired when at least one of the plurality of wireless devices shall treat the cell as barred, broadcasting 304, to the plurality of wireless devices 140, 145, information relating to a change of accessibility to the cell 150 for the at least one of the plurality of wireless devices 140, 145, the broadcasting of the information relating to changed accessibility enabling access attempts from the at least one of the plurality of wireless device to the cell 150 to be received at a time point that is dependent on the information relating to the changed accessibility.
  • the broadcasted 304 information relating to a change of accessibility is information that the cell 150 is not barred anymore. Further, the broadcasting of 304 of information that the cell 150 is not barred anymore enables access attempts from the at least one of the plurality of wireless devices to the cell to be triggered earlier than if the broadcasting of information that the cell 150 is not barred anymore had not been performed.
  • the broadcasted 304 information relating to a change of accessibility is information indicating that the duration time
  • the information indicating that the duration time during which the at least one of the plurality of wireless devices 140, 145 shall treat the cell 150 as barred is changed is information indicating that the duration time is shortened.
  • the broadcasting 302 of barring information to the plurality of wireless devices 140, 145 comprises a time parameter for each of the plurality of wireless devices 140, 145 to determine its duration time when it shall treat the cell 150 as barred.
  • the broadcasted 304 information relating to a change of accessibility is information indicating that the time parameter has changed.
  • the time parameter may have been decreased or increased.
  • the time parameter may be a common time parameter, i.e. , a time parameter that is common to the plurality of wireless devices, i.e., that the plurality of wireless devices uses to determine its individual duration time when accessibility to the cell is restricted.
  • the common time parameter may be uac- Barringtime.
  • the barring timer is a T390 timer as mentioned in [ref. 1], and parameters such as uac-BarringTime and uac- BarringFactor referred to in [ref. 1] are used.
  • the embodiments are applicable also to other barring timers at wireless devices using other parameters.
  • a network node handling a cell determines that the cell is congested, it broadcasts, according to [Ref. 1], to the wireless devices camping on this cell, barring information indicating restricted accessibility to the cell.
  • the barring information comprises uac-BarringFactor and uac-BarringTime, and an instruction to the wireless devices camping on the cell to draw a random number 'rand uniformly distributed between the wireless devices in the range: 0 ⁇ rand ⁇ 1 .
  • the uac-BarringFactor is set by the network node to a number between 0 and P106600 0.95. If 'rand is lower than the value indicated by the uac-BarringFactor, the wireless device shall consider an access attempt as allowed.
  • the wireless device shall consider an access attempt as barred.
  • the uac-Barringtime is set to 256 seconds and a certain wireless device, here called UE1 , that drew a 'rand lower than the uac-BarringFactor draws a “rand2" of 0.9.
  • the barring timer for UE1 will then run for another 200 seconds during which UE1 shall treat the cell as barred, i.e. , is not allowed to attempt to access the cell.
  • the network node would inform all wireless devices camping on the cell, or at least the wireless devices that still have their barring timers running, that the cell is not barred anymore, as soon as the network node determines that the congestion of the cell has ended.
  • the one or more wireless devices that still have their barring timers running would then take different actions to shorten their individual barring timers so that they will expire earlier, which are described in different embodiments below.
  • This means that UE1 above may shorten its barring time from the remaining 200 seconds to a value between the current 200 seconds down to zero seconds, whereby user experience for the user of UE1 would increase considerably compared to prior art methods.
  • the one or more wireless devices that still have their barring timers running when receiving the information from the network
  • the remaining duration time of the individual barring timer of the one or more wireless devices will be reduced with a certain value.
  • the certain value may be the same for each of the one or more wireless devices.
  • the one or more wireless device will reduce the remaining duration time of their individual barring timers with the same amount of k * 0.7 * uac-BarringTime.
  • An advantage of reducing the duration times of the barring timers instead of just immediately setting the duration times to zero for all of the one or more wireless devices, is that the risk of getting a new congestion in the cell due to many wireless devices attempting to access the cell at substantially the same time is reduced.
  • the duration time of this barring timer is adjusted to the remaining duration time and the barring timer is restarted from the remaining duration time.
  • the duration time of the barring timer is adjusted by reducing the remaining duration time of the barring timer by the certain value and restart the barring timer from the reduced remaining duration time.
  • An advantage with this embodiment is that the risk of a new congestion in the cell due to many wireless devices attempting to access the cell at the same time is further reduced. Also, the duration time for barring timers of wireless devices camping on a previously congested cell in total is reduced and user experience is increased compared to prior art.
  • the one or more wireless devices that still have their barring timers running when receiving the information from the network node that the cell is not barred anymore, will adjust the duration time of the barring timer to a lower value than the duration time of the barring timer determined when receiving the barring information indicating restricted accessibility to the cell. The barring timer is then restarted from the lower value. For example, when using formula 1 of [Ref.
  • Rand3 is here a value randomly taken from within a number span of 0 to y, where y is smaller than 1 , preferably much smaller, for example in the range of 0 - 0.3 or 0 - 0.5.
  • rand3 may be a new parameter which meaning, and usage might be hardcoded at each wireless device or might be communicated to each wireless device via e.g., a SIB.
  • the one or more wireless devices that still have their barring timers running when receiving the information from the network node that the cell is not barred anymore will reduce the remaining duration time of their respective barring timer by scaling the remaining duration time and restarting the timer from the reduced remaining duration time.
  • the scaling is performed either by dividing the remaining duration time with a factor larger than 1 or by multiplying the remaining duration time with a factor smaller than 1 .
  • the scaling factor when dividing could for example take a value of 2, 3, 10 etc.
  • Such a new scaling factor may be hardcoded at the wireless devices or broadcasted in e.g., a SIB.
  • the scaling factor when dividing has a value of 3
  • the remaining duration time for a first wireless device having a timer running is 75 seconds and the remaining duration time for a second wireless device having a timer running is 39 seconds.
  • the remaining duration time for the first wireless device is shortened to 25 seconds and the remining duration time for the second wireless device is shortened to 13 seconds.
  • the barring time is shortened for all the one or more wireless devices that still have their barring timers running, and also the expiry time of the barring timers for the one or more wireless devices are spread out in time.
  • the network node determines that the duration time of the barring timers are to be changed.
  • the reason to this may be that the network node observes that an expected time for the congestion of the cell may be increased or decreased compared to an P106600 originally expected congestion time.
  • the information relating to a change of accessibility that the network node then sends to the wireless devices camping on the cell and that has a barring timer running is information indicating that the duration time of the barring timer is changed.
  • the information indicating changed duration time of the barring timer may be a changed parameter for determining the barring time.
  • the changed parameter for determining the barring time may be the uac-BarringTime.
  • uac-BarringTime may be changed from 256 to 64 seconds or from 64 to 256 seconds.
  • Each of the one or more wireless devices having a barring timer running would then adjust its barring time to the changed information of duration time.
  • the adjustment of barring time may be performed by each wireless device according to any of the previously described embodiments.
  • Fig. 4 in conjunction with fig. 1 , describes a wireless device 140 configured for camping on a cell 150 handled by a network node 130 of a wireless communication network 100.
  • the wireless device is configured for handling the wireless device 140 at cell congestion.
  • the wireless device 140 comprises a processing circuitry 603 and a memory 604. Said memory contains instructions executable by said processing circuitry, whereby the wireless device 140 is operative for receiving, from the network node 130, barring information indicating restricted accessibility to the cell 150, determining, based on the barring information, that the wireless device 140 shall treat the cell 150 as barred, and, in response to the determining, starting a barring timer having a duration time during which the wireless device 140 shall treat the cell 150 as barred.
  • the wireless device 140 is further operative for receiving, from the network node 130, after the barring timer has started and before the barring timer has expired, information relating to a change of accessibility for the wireless device 140 to the cell 150, and adjusting the duration time of the barring timer in accordance with the information relating to the change of accessibility.
  • the wireless device 140 is operative for adjusting the duration time of the barring timer by restarting the barring timer.
  • the received information relating to a change of accessibility is information that the cell 150 is not barred anymore for the wireless device 140.
  • the received information relating to a change of accessibility is information indicating that the duration time of the barring timer is changed.
  • the barring information received from the network node 130 comprises a common time parameter for determining the duration time of the barring timer.
  • the common time parameter is intended to be used by a plurality of wireless devices 140, 145 camping on the cell including the wireless device 140. Further, the wireless device 140 is operative for determining the duration time of the barring timer based on the received common time parameter and a random parameter.
  • the received information relating to a change of accessibility for the wireless device 140 to the cell 150 is information indicating that the common time parameter has changed. Also, the wireless device 140 is operative for adjusting the duration time of the barring timer in accordance with the changed common time parameter.
  • the wireless device 140 is operative for adjusting the duration time of the barring timer by reducing the duration time of the barring timer.
  • the wireless device 140 is operative for reducing the duration time of the barring timer by a certain value.
  • the certain value is common to the plurality of wireless devices 140, 145 camping on the cell 150 including the wireless device 140. Further, the certain value may be proportional to the common time parameter or proportional to a change of the common time parameter.
  • a remaining duration time of the P106600 barring timer is left. Further, the wireless device 140 is operative for reducing the duration time of the barring timer by reducing the remaining duration time with a certain value. When the reducing of the remaining duration time of the barring timer by the certain value would result in that the barring timer has expired, the wireless device 140 is operative for determining that that the cell is not barred. When the reducing of the remaining duration time of the barring timer by the certain value would result in that the barring timer has not expired, the wireless device 140 is operative for restarting the barring timer from the remaining duration time reduced by the certain value.
  • a remaining duration time of the barring timer is left. Further, the wireless device 140 is operative for reducing the duration time of the barring timer either by dividing the remaining duration time with a factor larger than 1 or by multiplying the remaining duration time with a factor smaller than 1 so as to achieve a shorter remaining duration time that is shorter than the remaining duration time. The wireless device 140 is further operative for restarting the barring timer from the shorter remaining duration time.
  • the factor by which the wireless device is operative for dividing or multiplying the remaining duration time of the barring timer has a value that is common to a plurality of wireless devices 140, 145 camping on the cell 150 including the wireless device 140.
  • a remaining duration time of the barring timer is left. Further, the wireless device 140 is operative for determining whether reducing the remaining duration time of the barring timer by a certain value would result in that the barring timer has expired. When the determining results in that the barring timer would not have expired, the wireless device is operative for performing the adjusting of the duration time of the barring timer by reducing the remaining duration time of the barring timer by the certain value and by restarting the barring timer from the reduced remaining duration time.
  • a value of the random parameter used for the determining of the duration time of the barring timer is randomly taken from within a number span of 0 to x.
  • the wireless device 140 is operative for adjusting the duration time of the barring timer by redetermining the duration time of the barring timer based on the common time parameter and a second random parameter, which value is randomly taken from within a number span of 0 to y, where y is lower than x.
  • the wireless device 140 may further comprise a communication unit 602, which may be considered to comprise conventional means for wireless communication with the network node 130, such as a transceiver for wireless transmission and reception of signals.
  • the instructions executable by said processing circuitry 603 may be arranged as a computer program 605 stored e.g. in said memory 604.
  • the processing circuitry 603 and the memory 604 may be arranged in a sub-arrangement 601.
  • the subarrangement 601 may be a micro-processor and adequate software and storage therefore, a Programmable Logic Device, PLD, or other electronic component(s)/processing circuit(s) configured to perform the methods mentioned above.
  • the processing circuitry 603 may comprise one or more programmable processor, application-specific integrated circuits, field programmable gate arrays or combinations of these adapted to execute instructions.
  • the computer program 605 may be arranged such that when its instructions are run in the processing circuitry, they cause the wireless device 140 to perform the steps described in any of the described embodiments of the wireless device 140 and its method.
  • the computer program 605 may be carried by a computer program product connectable to the processing circuitry 603.
  • the computer program product may be the memory 604, or at least arranged in the memory.
  • the memory 604 may be realized as for example a Random-access memory (RAM), Read-Only Memory (ROM) or an Electrical Erasable Programmable ROM (EEPROM).
  • a carrier may contain the computer program 605.
  • the carrier may be one of an electronic signal, an optical P106600 signal, an electromagnetic signal, a magnetic signal, an electric signal, a radio signal, a microwave signal, or computer readable storage medium.
  • the computer- readable storage medium may be e.g. a CD, DVD or flash memory, from which the program could be downloaded into the memory 604.
  • the computer program may be stored on a server or any other entity to which the wireless device 140 has access via the communication unit 602.
  • the computer program 605 may then be downloaded from the server into the memory 604.
  • the wireless device 140 may further comprise a battery 606 for providing electrical power.
  • Fig. 5, in conjunction with fig. 1 shows a network node 130 configured to operate in a wireless communication network 100, and configured for handling a plurality of wireless devices 140, 145 camping on a cell 150 handled by the network node 130 at cell congestion.
  • the network node 130 comprises a processing circuitry 703 and a memory 704.
  • Said memory contains instructions executable by said processing circuitry, whereby the network node 130 is operative for, when determining that the cell is congested, broadcasting barring information to the plurality of wireless devices 140, 145, the barring information indicating restricted accessibility to the cell 150 for the plurality of wireless devices 140, 145.
  • the network node 130 is further operative for, after the broadcasting of the barring information and before a duration time has expired when at least one of the plurality of wireless devices shall treat the cell as barred, broadcasting, to the plurality of wireless devices 140, 145, information relating to a change of accessibility to the cell 150 for the at least one of the plurality of wireless devices 140, 145, the broadcasting of the information relating to changed accessibility enabling access attempts from the at least one of the plurality of wireless device to the cell 150 to be received at a time point that is dependent on the information relating to the changed accessibility.
  • the network node 130 is operative for the broadcasting of information relating to a change of accessibility by broadcasting information that the cell 150 is not barred anymore. This enables access attempts from the at least one of the plurality of wireless devices to the cell to be triggered
  • the network node 130 is operative for the broadcasting of information relating to a change of accessibility by broadcasting information indicating that the duration time during which the at least one of the plurality of wireless devices 140, 145 shall treat the cell 150 as barred is changed.
  • the information indicating that the duration time during which the at least one of the plurality of wireless devices 140, 145 shall treat the cell 150 as barred is changed is information indicating that the duration time is shortened.
  • the network node 130 is operative for the broadcasting of barring information to the plurality of wireless devices 140, 145 by broadcasting a time parameter for each of the plurality of wireless devices 140, 145 to determine its duration time when it shall treat the cell as barred.
  • the network node is also operative for the broadcasting of information relating to a change of accessibility by broadcasting information indicating that the time parameter has changed.
  • the network node 130 may further comprise a communication unit 702, which may be considered to comprise conventional means for wireless communication with the wireless device 140, such as a transceiver for wireless transmission and reception of signals in the communication network.
  • the communication unit 702 may also comprise conventional means for communication with other network nodes of the wireless communication network 100.
  • the instructions executable by said processing circuitry 703 may be arranged as a computer program 705 stored e.g. in said memory 704.
  • the processing circuitry 703 and the memory 704 may be arranged in a sub-arrangement 701 .
  • the sub-arrangement 701 may be a micro-processor and adequate software and storage therefore, a Programmable Logic Device, PLD, or other electronic component(s)/processing circuit(s) configured to perform P106600 the methods mentioned above.
  • the processing circuitry 703 may comprise one or more programmable processor, application-specific integrated circuits, field programmable gate arrays or combinations of these adapted to execute instructions.
  • the computer program 705 may be arranged such that when its instructions are run in the processing circuitry, they cause the network node 130 to perform the steps described in any of the described embodiments of the network node 130 and its method.
  • the computer program 705 may be carried by a computer program product connectable to the processing circuitry 703.
  • the computer program product may be the memory 704, or at least arranged in the memory.
  • the memory 704 may be realized as for example a Random-access memory (RAM), Read-Only Memory (ROM) or an Electrical Erasable Programmable ROM (EEPROM).
  • a carrier may contain the computer program 705.
  • the carrier may be one of an electronic signal, an optical signal, an electromagnetic signal, a magnetic signal, an electric signal, a radio signal, a microwave signal, or computer readable storage medium.
  • the computer- readable storage medium may be e.g. a CD, DVD or flash memory, from which the program could be downloaded into the memory 704.
  • the computer program may be stored on a server or any other entity to which the network node 130 has access via the communication unit 702. The computer program 705 may then be downloaded from the server into the memory 704.

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

Abstract

L'invention concerne un procédé mis en œuvre par un dispositif sans fil (140) campant sur une cellule (150) gérée par un nœud de réseau (130) d'un réseau de communication sans fil (100), pour gérer le dispositif sans fil (140) au niveau d'un encombrement de cellules. Le procédé consiste à recevoir, en provenance du nœud de réseau (130), des informations d'interdiction indiquant une accessibilité restreinte à la cellule (150), à déterminer, sur la base des informations d'interdiction, que le dispositif sans fil (140) doit traiter la cellule (150) comme étant interdite, puis à démarrer un temporisateur d'interdiction ayant une durée pendant laquelle le dispositif sans fil (140) doit traiter la cellule (150) comme étant interdite. Le procédé consiste en outre à recevoir, en provenance du nœud de réseau (130), après le démarrage du temporisateur d'interdiction et avant son expiration, des informations relatives à un changement d'accessibilité pour le dispositif sans fil (140) à la cellule (150), et à ajuster la durée du temporisateur d'interdiction conformément aux informations relatives au changement d'accessibilité.
PCT/SE2023/050044 2023-01-18 2023-01-18 Gestion d'un dispositif sans fil campant sur une cellule au niveau d'un encombrement de cellules WO2024155215A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/SE2023/050044 WO2024155215A1 (fr) 2023-01-18 2023-01-18 Gestion d'un dispositif sans fil campant sur une cellule au niveau d'un encombrement de cellules

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SE2023/050044 WO2024155215A1 (fr) 2023-01-18 2023-01-18 Gestion d'un dispositif sans fil campant sur une cellule au niveau d'un encombrement de cellules

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WO2024155215A1 true WO2024155215A1 (fr) 2024-07-25

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PCT/SE2023/050044 WO2024155215A1 (fr) 2023-01-18 2023-01-18 Gestion d'un dispositif sans fil campant sur une cellule au niveau d'un encombrement de cellules

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140171061A1 (en) * 2011-08-15 2014-06-19 Telefonaktiebolaget L M Ericsson (Publ) Network access delay for eab-configured ues and/or group-based addressed ues
US20210204192A1 (en) * 2018-09-28 2021-07-01 Lg Electronics Inc. Access control for data transmission
US20210266817A1 (en) * 2018-06-21 2021-08-26 Telefonaktiebolaget Lm Ericsson (Publ) Stop of Barring Timers
WO2022174709A1 (fr) * 2021-02-19 2022-08-25 Oppo广东移动通信有限公司 Procédé de contrôle d'accès, terminal et support de stockage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140171061A1 (en) * 2011-08-15 2014-06-19 Telefonaktiebolaget L M Ericsson (Publ) Network access delay for eab-configured ues and/or group-based addressed ues
US20210266817A1 (en) * 2018-06-21 2021-08-26 Telefonaktiebolaget Lm Ericsson (Publ) Stop of Barring Timers
US20210204192A1 (en) * 2018-09-28 2021-07-01 Lg Electronics Inc. Access control for data transmission
WO2022174709A1 (fr) * 2021-02-19 2022-08-25 Oppo广东移动通信有限公司 Procédé de contrôle d'accès, terminal et support de stockage

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
3GPP TS 38.304
3GPP TS 38.331

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