WO2021160021A1

WO2021160021A1 - A method ＆ system for optimizing service of a user equipment in a network

Info

Publication number: WO2021160021A1
Application number: PCT/CN2021/075281
Authority: WO
Inventors: Aashish SIOTRA; Naveen Bodapati
Original assignee: Guangdong Oppo Mobile Telecommunications Corp., Ltd.
Priority date: 2020-02-14
Filing date: 2021-02-04
Publication date: 2021-08-19

Abstract

The present disclosure proposes a system and method for optimizing service of a user equipment [200] in a network. More specifically, the present disclosure proposes to a solution for handling call failure and out of service scenarios in networks implementing access barring. The disclosure proposes to add a cell, for which access is barred, to a temporary barring list at the UE, and then selecting a new cell based on a cell selection criteria. If no other cells are found that meet the selection criteria, then the UE selects /connects to legacy Radio Access Technology (RAT) networks to continue availing services.

Description

A METHOD ＆ SYSTEM FOR OPTIMIZING SERVICE OF A USER EQUIPMENT IN A NETWORK

FIELD OF THE INVENTION

The present invention generally relates to wireless communication networks. More particularly, the invention relates to a system and method for optimizing service of a user equipment in a network particularly those networks implementing access control.

BACKGROUND OF THE DISCLOSURE

This section is intended to provide information relating to field of the invention and thus any approach or functionality described below should not be assumed to be qualified as prior art merely by its inclusion in this section.

Access control is a mechanism adopted by networks, such as LTE network, to control congestion of a network cell or network entity such as the eNodeB. A large number of user equipment try to access a single network cell then such network cell would be over-loaded or congested resulting in interference, or noise. This may also reduce the desired QoS parameters of the network. To prevent such a situation, the LTE network employs access control mechanisms that controls or limits the amount of user equipment that can access the network cell or entity.

One of the existing access control mechanisms deployed in a network allow a the network to accept an initial request from the user equipment but later sends a reject message such as RRC connection reject, attach reject, etc. Another access control mechanism deploys a mechanism whereby the user equipment cannot access the network at all, i.e. complete barring. In this case, the user is unable to contact the network entity at all.

Typically, the user equipment becomes aware of such access control or barring being deployed by a network cell or entity based on the System Information Block (SIB2) message received from the network entity. This message block also contains information on the type of access barring being deployed by the network entity.

While access control mechanisms are necessary for congestion control at the network level, they pose certain inherent drawbacks and problems on the user equipment side. For instance, if a user equipment (UE) , during the implementation of an access control mechanism, detects a parameter ac-BarringForMO-Data being included in the system information block SIB2 received from the network entity, the UE checks if the cell if barred for MO data. If yes, then access barring check is performed and if no, then VoLTE or data call can be initiated since access is not barred. Further, if the value of a random value between 0 and 1is not less than the barring factor, the cell access is barred and thus the VoLTE or data call cannot be initiated. Thus, user is unable to make a voice call in this scenario and faces frustration.

Similarly, in another instance if the UE may detect the parameter ac-BarringForMO-Signaling being included in the system information block SIB2 received from the network entity, the UE sends an RRC connection request with cause ‘MO-Signaling’ and checks if the cell if barred for MO signaling. If yes, then the access barring check is performed. Further, if the value of a random value between 0 and 1 is not less than the barring factor, cell access is barred and thus RRC connection request cannot be initiated. This will impact all scenarios in which RRC connection request is initiated with cause ‘MO signalling’ .

Accordingly, in view of these limitations, there is an imperative need in the art to provide a solution that overcomes these drawbacks at the user equipment level, while also maintaining access control mechanisms at the network level.

SUMMARY

This section is provided to introduce certain objects and aspects of the present disclosure in a simplified form that are further described below in the detailed description. This summary is not intended to identify the key features or the scope of the claimed subject matter.

In order to overcome at least a few problems associated with the known solutions as provided in the previous section, an object of the present disclosure is to provide a system and method for optimizing service for a user equipment in a access barring scenario. It is another object of the invention to optimize call success rate for the user equipment. It is yet another object of the invention to provide a solution for out of service scenarios in LTE networks.

In order to achieve the afore-mentioned objectives, the present disclosure provides a method and system of optimizing service of a user equipment in a network. The method for optimizing service of a user equipment in a network, begins with receiving, from a network entity of the network at the user equipment, a system information block message corresponding to a first cell of the network, wherein said network implements a first radio access technology. This system information block message is processed to identify an indication of access class barring. The cell is then added to a temporary barring list. Thereafter, the user equipment identifies a second cell being satisfying a selection criteria and camps on to said second cell based on successful identification of said second cell.

Another aspect of the invention relates to a system for optimizing service of a user equipment in a network. The system comprises at least one user equipment connected to at least one network entity to optimize a service being provided to the user equipment. The network entity of the system is configured to transmit, a system information block message corresponding to a first cell of the network, wherein said network implements a first radio access technology. Thereafter the user equipment of said system processes this system information block message to identify an indication of access class barring. The cell is then added to a temporary barring list. Thereafter, the user equipment identifies a second cell being satisfying a selection criteria and camps on to said second cell based on successful identification of said second cell.

Yet another aspect of the invention relates to a user equipment for optimizing service of a user equipment in a network. The user equipment comprises a transceiver unit and a processing unit. The transceiver unit is configured to receive from a network entity of the network, a system information block message corresponding to a first cell of the network, wherein said network implements a first radio access technology. The processing unit is configured to process said received system information block to identify an indication of access class barring, add said first cell to a temporary barring list, and identify a second cell being satisfying a selection criteria. The transceiver unit is further configured to camp the user equipment to said second cell, based on successful identification of the second cell.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated herein, and constitute a part of this disclosure, illustrate exemplary embodiments of the disclosed methods and systems in which like reference numerals refer to the same parts throughout the different drawings. Components in the drawings are not necessarily to scale, emphasis instead being placed upon clearly illustrating the principles of the present disclosure. Some drawings may indicate the components using block diagrams and may not represent the internal circuitry of each component. It will be appreciated by those skilled in the art that disclosure of such drawings includes disclosure of electrical components, electronic components or circuitry commonly used to implement such components.

Figure 1 illustrates a block diagram of a system for optimizing service in a network, in accordance with exemplary embodiments of the present disclosure.

Figure 2 illustrates a block diagram of a user equipment for optimizing service in a network, in accordance with exemplary embodiments of the present disclosure.

Figure 3 illustrates a method flow diagram of a method of optimizing service of a user equipment in a network, in accordance with exemplary embodiments of the present disclosure.

Figure 4 illustrates a first exemplary implementation of the method of optimizing service of a user equipment in a network, in accordance with exemplary embodiments of the present disclosure.

Figure 5 illustrates a second exemplary implementation of the method of optimizing service of a user equipment in a network, in accordance with exemplary embodiments of the present disclosure.

The foregoing shall be more apparent from the following more detailed description of the disclosure.

DETAILED DESCRIPTION

In the following description, for the purposes of explanation, various specific details are set forth in order to provide a thorough understanding of embodiments of the present invention. It will be apparent, however, that embodiments of the present invention may be practiced without these specific details. Several features described hereafter can each be used independently of one another or with any combination of other features. An individual feature may not address any of the problems discussed above or might address only some of the problems discussed above. Some of the problems discussed above might not be fully addressed by any of the features described herein.

The ensuing description provides exemplary embodiments only, and is not intended to limit the scope, applicability, or configuration of the disclosure. Rather, the ensuing description of the exemplary embodiments will provide those skilled in the art with an enabling description for implementing an exemplary embodiment. It should be understood that various changes may be made in the function and arrangement of elements without departing from the spirit and scope of the invention as set forth.

Specific details are given in the following description to provide a thorough understanding of the embodiments. However, it will be understood by one of ordinary skill in the art that the embodiments may be practiced without these specific details. For example, circuits, systems, networks, processes, and other components may be shown as components in block diagram form in order not to obscure the embodiments in unnecessary detail. In other instances, well-known circuits, processes, algorithms, structures, and techniques may be shown without unnecessary detail in order to avoid obscuring the embodiments.

Also, it is noted that individual embodiments may be described as a process which is depicted as a flowchart, a flow diagram, a data flow diagram, a structure diagram, or a block diagram. Although a flowchart may describe the operations as a sequential process, many of the operations can be performed in parallel or concurrently. In addition, the order of the operations may be re-arranged. A process is terminated when its operations are completed but could have additional steps not included in a figure.

The present disclosure proposes a system and method for optimizing service of a user equipment in a network. More specifically, the present disclosure proposes to a solution for handling call failure and out of service scenarios in networks implementing access barring. The disclosure proposes to add a cell, for which access is barred, to a temporary barring list at the UE, and then selecting a new cell based on a cell selection criterion. If no other cells are found that meet the selection criteria, then the UE selects /connects to legacy Radio Access Technology (RAT) networks.

As used herein, a “processing unit” or “processor” includes one or more processors, wherein processor refers to any logic circuitry for processing instructions. A processor may be a general-purpose processor, a special purpose processor, a conventional processor, a digital signal processor, a plurality of microprocessors, one or more microprocessors in association with a DSP core, a controller, a microcontroller, Application Specific Integrated Circuits, Field Programmable Gate Array circuits, any other type of integrated circuits, etc. The processor may perform signal coding data processing, input/output processing, and/or any other functionality that enables the working of the system according to the present disclosure. More specifically, the processor or processing unit is a hardware processor.

As used herein, “user equipment” , may be any electrical, electronic and computing device or equipment capable of connecting to a radio access network. The user equipment may include, but is not limited to, a mobile phone, smart phone, laptop, a general-purpose computer, desktop, personal digital assistant, tablet computer, wearable device or any other computing device which is capable connecting to a radio access network. The user equipment contains at least one input means configured to receive an input from a user, a processing unit, a storage unit and a display unit.

The invention is further explained in detail below with reference now to the diagrams.

Referring to Fig. 1, that illustrates a system for optimizing service in a network, in accordance with exemplary embodiments of the present disclosure. As shown in Fig. 1, a plurality of user devices [200 (1) ] , [200 (2) ] …. [200 (N) ] (Collectively referred to as user devices [200] ) may be connected to at least one network entity [102] , to optimize service of the user equipment [200] in a network.

Although a limited number of user devices [200] and network entity [102] are shown in Fig. 1, however, it will be appreciated by those skilled in the art that the invention encompasses the use of multiple such user devices [200] and network entity [102] , as may be necessary to implement the features of the invention.

The network entity [102] is a part of at least one of a cellular network for providing voice services (calls) and the data services to the user equipment [200] . The network entity may include, but not limited to, a base station controller, a base transceiver station, a cell site, a Node B, an eNodeB, a radio network controller, and any such unit of a cellular network obvious to a person skilled in the art. The network entity [102] is configured to transmit at the user equipment [200] , a system information block message (SIB2) corresponding to a first cell of the network, wherein said network implements a first radio access technology. Also, the system information block message comprises of radio resource configuration information, including Access Class Barring configuration, RACH related configuration, Timers, UL Power control, Sounding Reference Signal configuration, etc. SIB2 is transmitted from the network entity to UE through BCCH -> DL-SCH -> PDSCH channels.

The access class barring information in SIB2 may include for example, indication for: AC-Barring For MO-Signaling, ac-Barring Factor, ac-Barring Time, ac-Barring For Special AC, AC-Barring for MO-Data, ac-Barring Factor for MO data, etc.

As used herein, the indication AC-Barring For MO-Signaling determines whether or not UE should treat the cell as barred when initiating a mobile originated (MO) signaling connection. As used herein, the indication AC-Barring for MO-Data determines if the cell is to be treated as barred for MO data connections, for instance for data or Voice over LTE calls. As used herein the access barring factor is a factor that determines if a UE needs to treat a cell as barred or not. The barring factor may have a value in the range of 0 to 0.95.

Thereafter the user equipment [200] , processes said received system information block to identify an indication of access class barring. The access class barring is one of a signaling barring and mobile originating data barring. The user equipment [200] , parses the SIB2 information block to determine presence of AC-Barring For MO-Signaling, ac-Barring Factor, ac-Barring Time, ac-Barring For Special AC, AC-Barring for MO-Data, ac-Barring Factor for MO data, and the like parameters. If any of the access barring is indicated by these parameters in the SIB2 block then the user equipment [200] adds the first cell from which the SIB2 is received, to a temporary barring list. The user equipment [200] , comprises a memory unit to store said temporary barring list.

Next, after adding said first cell to a temporary barring list, the user equipment [200] further identifies second cell being satisfying a selection criteria such that the user equipment [200] can be camped on to this identified second cell. The selection criteria is dynamic and is regularly updated at the user equipment by known methods in the art.

The user equipment [200] then camps on to said second cell, based on successful identification of the second cell.

Also the user equipment [200] is configured to switch from said first radio access technology to a second radio access technology based on an unsuccessful identification of the second cell. The second radio access technology is a legacy technology compared to the first radio access technology.

Referring to Fig. 2, that illustrates a block diagram of a user equipment for optimizing service in a network, in accordance with exemplary embodiments of the present disclosure. As shown in Fig. 2, the user equipment [200] comprises of a transceiver unit 202, processing unit 204, memory unit 206, said components being inter-connected to each other to implement the features of the invention.

Transceiver unit 202 comprises of at least one transmitter, at least one receiver and an antenna to enable communication of the user equipment with the network. These components have not been shown in the figure for the sake of clarity. The transceiver unit 202 is configured to receive from a network entity, among other information, a System Information block message. This system information block message comprises of radio resource configuration information, including Access Class Barring configuration, RACH related configuration, Timers, UL Power control, Sounding Reference Signal configuration, etc. SIB2 is transmitted from the network entity to UE through BCCH -> DL-SCH -> PDSCH channels.

As used herein, the indication AC-Barring For MO-Signaling determines whether or not UE should treat the cell as barred when initiating a mobile originated (MO) signaling connection. As used herein, the indication AC-Barring for MO-Data determines if the cell is to treated as barred for MO data connections, for instance for data or Voice over LTE calls. As used herein the access barring factor is a factor that determines if a UE needs to treat a cell as barred or not. The barring factor may have a value in the range of 0 to 0.95.

The transceiver unit 202 is further configured to pass on the SIB2 block information to the processing unit 204. The processing unit 204 is configured to process said received system information block to identify an indication of access class barring. This includes parsing of the SIB2 information block by the processing unit 204 to determine presence of parameters such as AC-Barring For MO-Signaling, ac-Barring Factor, ac-Barring Time, ac-Barring For Special AC, AC-Barring for MO-Data, ac-Barring Factor for MO data, etc. If any of the access barring is indicated by these parameters in the SIB2 block then the processing unit [204] adds the first cell from which the SIB2 is received, to a temporary barring list. The invention encompasses that the processing unit [204] is configured to transmit the first cell information to the memory unit [206] wherein the first cell information is added to the temporary barring list.

The processing unit [204] is further configured to identify a second cell being satisfying a selection criteria such that the UE can be camped on to this identified second cell. The processing unit [204] is also configured to provide the second cell information to the transceiver unit [202] that is further configured to camp the UE to the second cell.

The memory unit [206] is configured to store and maintain a temporary barring list wherein the cells for which access is barred is added to this list by the processing unit [204] . The memory unit [206] is further configured to maintain a status of the UE including the current cell to which the UE is latched, etc. The memory [204] may include a random access memory (RAM) , a read-only memory (ROM) , and/or another type of memory to store data and instructions that may be used by the processing unit [204] .

Figure 3 illustrates a method flow diagram of a method of optimizing service of a user equipment in a network, in accordance with exemplary embodiments of the present disclosure. As shown in figure 3, the method begins at step 302 and proceeds to step 304 when the user equipment receives a system information block message from the network entity. The network is a radio access network implementing a radio access technology such as LTE that is capable of implementing access control mechanisms. The system information block message comprises of indication of the implementation of such access control mechanisms a way of indication of access class barring. This system information block message received from the network entity corresponds to a first cell of the network.

Next, at step 306 the user equipment processes said received system information block message to identify an indication of access class barring. This step involves passing the system information block message to identify such indication of access class barring. The access class barring maybe a signalling barring or a data barring. Once such access barring parameter or indication is identified, the user equipment at step 308, adds the first cell to a temporary barring list. This includes transmitting information of the first cell to the memory unit 206 of the user equipment where in the memory unit 206 stores a list of temporarily barred cells.

Subsequently, at step 310, the user equipment identifies a second cell satisfying a selection criteria. This selection criteria is the same as the selection criteria of the first cell. The selection criteria is dynamic and is regularly updated at the user equipment by known methods in the art. At step 312, the user equipment then camps on to the second cell successfully identified in the previous step. Thereafter, the method terminates at step 314.

The method encompasses that if the user equipment is unable to identify the second cell at step 310 then the equipment switches to a lower radio access technology in order to avail services at the moment. For instance, a user equipment currently being camped on a LTE cell shall switch to a 3G network cell in order to avail a voice call service.

Thus, user is now able to initiate a MO call/signalling from the user equipment 200, via either a second cell or a cell of a lower RAT. This leads to optimization of services of the user equipment 200 in the network.

Figure 4 illustrates a first exemplary implementation of the method of optimizing service of a user equipment in a network, in accordance with exemplary embodiments of the present disclosure. As shown in figure 4, the method begins at step 402 and proceeds to step 404 where in the user equipment detects an indication for ac-Barring For MO-Data included in System Information Block Type 2. For example, the access barring parameter may include the ‘ac-BarringForMO-Data’ indication in the SIB2 message. This also includes the ac-barring factor which has a value between 0 and 0.95.

Thereafter, when the user equipment [200] attempts to make a Data call or a voice over LTE call, the method needs to perform access barring check. Therefore, at step 406, the user equipment [200] checks if the cell is barred for a MO data. In case the same is barred for MO data, the method leads to step 408, else to step 410.

At step 408, the user equipment generates a random value between zero and one and thereafter, at step 412 determines if such random value generated by the user equipment is less than the barring factor included in the system information block type 2 message. If the random value is less than the barring factor, the method leads to step 410, else to step 414. For example, if the ac-barring factor is 0.45 and the random value generated is by the user equipment is 0.05, then the method leads to step 410. At step 410, since it is determined that cell access is not barred, data call or voice over LTE call be initiated by the user equipment 200.

However, if cell access is barred then add step 414, this cell for which access is barred is added to temporary barring list. For instance, if the ac-barring factor is 0.45 and the random value generated is by the user equipment is 0.55, then the method leads to step 414. Thereafter, the cell information is identified from the SIB2 message or any other broadcasted message by this cell such as the SIB1 message to determine the cell identity of the cell for which access is barred. For example, if cell A is determined to be an access barred cell then cell A along with its cell id is added to the temporary barring list.

Subsequently, at step 416, any other cell meeting the cell selection criteria is identified. Next at step 418, the user equipment 200 checks if a new cell has been found in which case the method proceeds to step 422 where in the user equipment 200 camps on the new cell. On the other hand, if now new cell meeting the selection criteria is found at step 418, then the method proceeds to step 420 wherein the user equipment 200 is forced to switch to a legacy radio access technology cell such as 2G or 3G, and the user equipment 200 attempts to acquire services via such legacy RAT cells. The method then terminates at step 424.

Figure 5 illustrates a second exemplary implementation of the method of optimizing service of a user equipment in a network, in accordance with exemplary embodiments of the present disclosure. As shown in figure 5, the method begins at step 502 and proceeds to step 504 where in the user equipment 200 detects an indication for ac-Barring For MO-Data included in System Information Block Type 2. For example, the access barring parameter may include the ‘ac-BarringForMO-Signaling’ indication in the SIB2 message. This also includes the ac-barring factor which has a value between 0 and 0.95.

Next, at step 506, the user equipment 200 sends an RRC connection request with cause ‘MO-signaling’ . Thereafter, at step 508, the user equipment [200] checks if the cell is barred for a MO signaling. In case the same is barred for MO signaling, the method leads to step 510, else to step 512.

At step 510, the user equipment [200] generates a random value between zero and one and thereafter, at step 514 determines if such random value generated by the user equipment [200] is less than the barring factor included in the system information block type 2 message. If the random value is less than the barring factor, the method leads to step 512, else to step 516. For example, if the ac-barring factor is 0.45 and the random value generated is by the user equipment is 0.05, then the method leads to step 512. At step 512, since it is determined that cell access is not barred, RRC connection request can be initiated by the user equipment 200.

However, if cell access is barred then add step 514, this cell for which access is barred is added to temporary barring list at step 516. For instance, if the ac-barring factor is 0.45 and the random value generated is by the user equipment is 0.55, then the method leads to step 516. Thereafter, the cell information is identified from the SIB2 message or any other broadcasted message by this cell such as the SIB1 message to determine the cell identity of the cell for which access is barred. For example, if cell A is determined to be an access barred cell then cell A along with its cell id is added to the temporary barring list.

Subsequently, at step 518, any other cell meeting the cell selection criteria is identified. Next at step 520, the user equipment 200 checks if a new cell has been found in which case the method proceeds to step 524 where in the user equipment 200 camps on the new cell. On the other hand, if no new cell meeting the selection criteria is found at step 520, then the method proceeds to step 522 wherein the user equipment 200 is forced to switch to a legacy radio access technology cell such as 2G or 3G, and the user equipment 200 attempts to acquire services via such legacy RAT cells. The method then terminates at step 526.

Thus, as is evident from the above description, the invention enables reduction of no service scenarios in LTE mobile devices. In the current implementation, i.e. the prior art solutions the user equipment [200] gets stuck in no service state for a long period of time when it faces, an access class barring scenario. Leads to optimisation of service of the user equipment in the LT network. With access class barring being implemented in the LTE network the user equipment often gets barred for mobile and data services. However, with the proposed solution of the invention, voice and data services can be accessible to the users even if the LTE cell is barred for these services.

More particularly, in the prior art implementation/scenario if ‘ac-BarringForMO-Data’ is included in ‘AC barring parameter’ , a user is unable to initiate MO call. Also if, ‘ac-BarringForMO-Signalling’ is included in ‘AC barring parameter’ , many procedures are impacted, like Attach procedure, TAU procedure, Detach procedure, MO MMTEL voice call, MO MMTEL video call, MO SMSoIP , MO SMS over NAS or MO SMS over S102 and other procedures where establishment cause is ‘MO signalling’ and UE goes out of service for long time. The selection/reselection or Handover to a cell with ac-BarringForMO-Data/ac-BarringForMO-Signalling, thus impacts the service of the user equipment. Also if there is only one LTE cell available in specific area which is of different Tracking Area (TA) and network imposed either of the access barring then after reselecting to such cell, UE unable to initiate the Tracking area update. This further cause failing of all mobile services including MT services as network doesn’t know the UEs Tracking area. All of these limitations are overcome by the above-mentioned proposed solution that provides significant technical advancement over the prior art solutions.

While considerable emphasis has been placed herein on the disclosed embodiments, it will be appreciated that many embodiments can be made and that many changes can be made to the embodiments without departing from the principles of the present invention. These and other changes in the embodiments of the present invention will be apparent to those skilled in the art, whereby it is to be understood that the foregoing descriptive matter to be implemented is illustrative and non-limiting. Although the invention has been discussed with reference to implementation in MO-Data and MO-Signaling access barring, it will be appreciated by those skilled in the art that the invention also encompasses of implementation in any other type of access class barring as well.

Claims

A method for optimizing service of a user equipment [200] in a network, the method comprising:

receiving, from a network entity of the network at the user equipment [200] , a system information block message corresponding to a first cell of the network;

processing, by the user equipment [200] , said received system information block to identify an indication of access class barring;

adding, by the user equipment [200] , said first cell to a temporary barring list;

identifying, by the user equipment [200] , a second cell being satisfying a selection criteria; and

camping, by the user equipment [200] , to said second cell, based on successful identification of the second cell.
The method as claimed in claim 1 wherein the access class barring is one of a signaling barring and mobile originating data barring.
The method as claimed in claim 1 further comprising switching the user equipment [200] from a first radio access technology implemented by said network to a second radio access technology based on an unsuccessful identification of the second cell.
The method as claimed in claim 3 wherein the second radio access technology is a legacy technology compared to the first radio access technology.
The method as claimed in claim 1 further comprising storing said temporary barring list at said user equipment [200] .
A system [100] for optimizing service in a network, the system [100] comprising:

a network entity [102] configured to transmit, a system information block message corresponding to a first cell of the network;

a user equipment [200] connected to said network entity [102] , the user equipment [102] is configured to:

process, said received system information block to identify an indication of access class barring;

add, said first cell to a temporary barring list;

identify, a second cell being satisfying a selection criteria; and

camp, to said second cell, based on successful identification of the second cell.
The system as claimed in claim 6, wherein the access class barring is one of a signaling barring and mobile originating data barring.
The system as claimed in claim 6, wherein the network entity [102] is further configured to implement a first radio access technology.
The system as claimed in claim 6, wherein the system [100] is further configured to switch the user equipment [200] from said first radio access technology to a second radio access technology based on an unsuccessful identification of the second cell.
The system as claimed in claim 9, wherein the second radio access technology is a legacy technology compared to the first radio access technology.
The system as claimed in claim 6, wherein the system [100] is further configured to store said temporary barring list at said user equipment [200] .
A user equipment [200] for optimizing service in a network, the user equipment [200] comprising:

a transceiver unit [202] configured to receive from a network entity of the network, a system information block message corresponding to a first cell of the network; and

a processing unit [204] connected to said transceiver unit [202] , the processing unit [204] configured to

process said received system information block to identify an indication of access class barring,

add said first cell to a temporary barring list, and

identify a second cell being satisfying a selection criteria,

wherein the transceiver unit [202] is further configured to camp the user equipment [200] to said second cell, based on successful identification of the second cell.
The user equipment [200] as claimed in claim 12 wherein the access class barring is one of a signaling barring and mobile originating data barring.
The user equipment [200] as claimed in claim 12 wherein the transceiver unit [202] is further configured to switch the user equipment [200] from a first radio access technology implemented by said network to a second radio access technology based on an unsuccessful identification of the second cell.
The user equipment [200] as claimed in claim 14 wherein the second radio access technology is a legacy technology compared to the first radio access technology.
The user equipment [200] as claimed in claim 12 further comprising a memory unit [206] configured to store said temporary barring list.