WO2013107387A1

WO2013107387A1 - Method for determining paging subframe, base station, and user equipment

Info

Publication number: WO2013107387A1
Application number: PCT/CN2013/070692
Authority: WO
Inventors: 杨飞; 李龠; 朱松; 熊新; 甄斌
Original assignee: 华为技术有限公司
Priority date: 2012-01-20
Filing date: 2013-01-18
Publication date: 2013-07-25
Also published as: CN103220812B; CN103220812A

Abstract

Disclosed are a method for determining a paging subframe of a half-duplex user equipment, a base station, and a user equipment. The present invention further relates to a method for handling a conflict between a paging subframe and an uplink subframe. The method for determining a paging subframe of a half-duplex user equipment comprises: receiving a preamble from a user equipment, the preamble having a predetermined configuration; determining a paging subframe according to the predetermined configuration. By means of the solution provided by the embodiment of the present invention, a base station can determine a paging subframe of a user equipment in advance according to a preamble, so as to allocate an uplink subframe different from the paging subframe to the user equipment during scheduling, thereby effectively avoiding the conflict problem that may occur when a half-duplex user equipment accesses a full-duplex FDD system.

Description

Method for determining paging subframe, base station and user equipment This application claims to be submitted to the Chinese Patent Office on January 20, 2012, the application number is 201210019040.1, and the invention name is "Method for determining paging subframe, base station and user equipment" Priority of Chinese Patent Application, the entire contents of which is incorporated herein by reference. TECHNICAL FIELD The present invention relates to the field of communications technologies, and in particular, to a method, a base station, and a user equipment for determining a paging subframe of a half-duplex user equipment. Furthermore, the present invention relates to a method of handling collisions between paging sub-frames and uplink sub-frames. BACKGROUND OF THE INVENTION In most machine-to-machine applications, such as smart meter reading applications, it is desirable to minimize the cost of the terminal due to the large number of terminals required. The cost of a Frequency Division Duplex (FDD) terminal of the existing Long Term Evolution (LTE) system is relatively high, and the Duplexer accounts for about 10% of the total cost of the communication module. If the duplexer is replaced by a switch, the cost of the terminal can be reduced, but the terminal using the switch can only operate in half-duplex mode, that is, it is either in the receiving state or in the transmitting state at the same time.

When a half-duplex terminal accesses a full-duplex FDD system, there are some conflicting possibilities. In the existing LTE mechanism, the possible paging subframe number of the user equipment (User Equipment, UE) is subframe 0, 4, 5 or 9. The subframe number of the Physical Random Access Channel (PRACH) is allocated by the upper layer, which may occur in any subframe. For example, Figure 1 shows a schematic diagram of possible paging subframes and possible PRACH subframes. When the User Equipment (UE) is in the idle state, since the eNode B does not know the capabilities of the UE, the eNode B may allocate the PRACH subframe above the subframe in which paging may occur. For example, in Fig. 1, if the paging subframe is the fourth downlink subframe, the PRACH is allocated in the fourth uplink subframe. Such allocation is no problem for full-duplex FDD UEs because they can transmit and receive at the same time. However, for a half-duplex UE, since it can only be in one state, that is, a transmission state or a reception state, at the same time, There is a problem with the case of a half-duplex UE.

In addition, FIG. 2 shows a flow chart in which the UE transitions from an idle state to a connected state in the prior art. It can be seen that when the UE transitions from the idle state to the connected state, the preamble message preamble is first sent to the eNode B, and then the UE receives the RAR message from the eNode B within a set time window, and successfully receives the RAR message. After the information is received, the UE sends a Radio Resource Control (RRC) Connection Request (RRC Connection Request) message at the time of scheduling of the eNode B. Since the eNode B does not know the paging subframe number information of the UE, the RRC Connection Request message may be scheduled on the same subframe as the paging subframe. For a half-duplex UE, it is either transmitted or received in the same subframe, so there is a problem with the half-duplex UE. Summary of the invention

The embodiment of the present invention provides a method, a base station, and a user equipment for determining a paging subframe of a half-duplex user equipment, to solve the problem that a half-duplex UE in the prior art may be used in a full-duplex FDD system. Conflict issue.

In one aspect, an embodiment of the present invention provides a method for determining a paging subframe of a half-duplex user equipment, including: receiving a preamble from the user equipment, where the preamble has a predetermined configuration, The predetermined configuration is used to determine the paging subframe.

On the other hand, an embodiment of the present invention provides a method for determining a paging subframe of a half-duplex user equipment, including: the user equipment notifying a base station of the paging subframe by using a preamble, where the preamble There is a predetermined configuration that enables the base station to determine the paging subframe according to the predetermined configuration.

In another aspect, an embodiment of the present invention provides a base station, including: a receiving unit, configured to receive a preamble from the user equipment, where the preamble has a predetermined configuration, and a determining unit is configured to The predetermined configuration determines the paging subframe.

On the other hand, an embodiment of the present invention provides a half-duplex user equipment, including a sending unit, configured to notify a base station of a paging subframe of the user equipment by using a preamble, where the preamble has a predetermined configuration. ??? enabling the base station to determine the paging subframe according to the predetermined configuration.

According to the solution provided by the embodiment of the present invention, the base station can know the paging subframe of the user equipment in advance according to the preamble, so that the uplink subframe different from the paging subframe can be allocated to the user equipment when scheduling, effectively Avoid conflicts that may occur when a half-duplex user equipment is connected to a full-duplex FDD system.

According to a further embodiment of the present invention, a method for processing a collision between a paging subframe and an uplink subframe is provided, including: determining whether a collision subframe between the PRACH subframe and the user equipment conflicts; When a collision occurs, a paging subframe or a PRACH subframe is processed according to different priorities. In addition, the embodiment of the present invention further provides a half-duplex user equipment, including: a determining unit, configured to determine whether a collision subframe between the PRACH subframe and the user equipment conflicts; and a processing unit, configured to: When a collision occurs, a paging subframe or a PRACH subframe is processed according to different priorities.

According to the solution provided by the embodiment of the present invention, the user equipment can effectively handle the conflict between the uplink PRACH subframe and the downlink paging subframe, thereby ensuring the performance of the communication system. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings in the following description are only Some embodiments of the invention may be obtained by those of ordinary skill in the art from the drawings without departing from the scope of the invention.

Figure 1 shows a schematic diagram of possible paging subframes and possible PRACH subframes;

2 is a flow chart showing transition of a UE from an idle state to a connected state in the prior art;

3 is a flow chart showing a method of determining a paging subframe of a half-duplex user equipment according to an embodiment of the present invention;

FIG. 4 is a schematic diagram showing the configuration of a PRACH time-frequency resource block according to an implementation form;

FIG. 5 is a schematic diagram showing the configuration of a PRACH time-frequency resource block according to another implementation form; FIG. 6 is a schematic diagram showing the configuration of a PRACH time-frequency resource block according to still another embodiment; Schematic diagram of a configuration of a PRACH time-frequency resource block; FIG. 8 is a flowchart showing a method for processing a collision between a paging subframe and an uplink subframe according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a base station according to an embodiment of the present invention;

FIG. 10 shows a schematic structural diagram of a half-duplex user equipment according to an embodiment of the present invention; and FIG. 11 shows a schematic structural diagram of another half-duplex user equipment according to an embodiment of the present invention. The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. example. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention. The inventor noted that the reason for the collision when the half-duplex user equipment accesses the full-duplex FDD system is that the base station fails to know the paging subframe information of the half-duplex user equipment. Therefore, the embodiment of the present invention provides a method for determining a paging subframe of a half-duplex user equipment, so that the base station can know the paging subframe of the half-duplex user equipment, and allocate an uplink subframe according to the user equipment. .

FIG. 3 is a flow chart showing a method of determining a paging subframe of a half-duplex user equipment according to an embodiment of the present invention. This method can be implemented on the base station side. As can be seen from the figure, the method includes the following steps:

Step 310: Receive a preamble from the user equipment, where the preamble has a predetermined configuration. It is known to those skilled in the art that in the existing LTE system, the possible paging occasion of the user equipment UE is subframe 0, 4, 5 or 9. The paging subframe is determined by the user equipment according to a predetermined algorithm. For example, the user equipment can determine its own paging subframe according to a predetermined algorithm according to its own International Mobile Subscriber Identifier (IMSI). After the user equipment determines its own paging sub-frequency, the base station may be implicitly notified to the base station by using a predetermined configuration of the preamble, so that when the uplink subframe needs to be allocated, the base station will be different from the paging. The uplink subframe of the subframe is allocated to the user equipment.

Here, the predetermined configuration may be a preamble having a special time-frequency resource block, or may be a preamble having a special packet mode. Regarding this configuration, it will be specifically described below.

Step 320: Determine the paging subframe according to the predetermined configuration. With this predetermined configuration, the base station can implicitly know the paging subframe of the UE according to the prior agreement without special message delivery.

With the method according to the embodiment of the present invention, the base station can know the paging subframe of the user equipment in advance according to the preamble, so that the uplink subframe different from the paging subframe can be allocated to the user equipment when scheduling, effectively avoiding A conflict that may occur when a half-duplex user equipment is connected to a full-duplex FDD system. For example, the base station may schedule an uplink subframe that carries a radio resource control RRC connection request according to the determined paging subframe, so that the uplink subframe and the paging subframe occupy different positions. Subframe.

The configuration of the preamble will be specifically described below.

FIG. 4 is a schematic diagram showing the configuration of a physical random access channel (PRACH) time-frequency resource block according to an implementation form.

In the implementation shown in FIG. 4, the preamble of the half-duplex user equipment and the preamble of the full-duplex user equipment are located in one physical random access channel PRACH time-frequency resource block F1. For example, in the time-frequency resource block F1 64 preambles. These preambles can be grouped to inform the base station of the half-duplex user equipment's paging subframe by means of packets.

For example, the number of preambles reserved for half-duplex user equipment is 16 (from the 48th preamble to the 63rd preamble). The number of possible paging occasions for a half-duplex user equipment is 4. From the 48th preamble to the 51st preamble can be reserved for paging occasion 0; from the 52nd preamble to the 55th preamble reserved for paging occasion 4; from the 56th preamble to lj 59 The preamble is reserved for paging occasion 5; the preamble by !j is reserved for paging occasion 9. Thus, after receiving a special preamble, the base station can determine whether the UE is a half-duplex user equipment and what its paging occasion is. For example, when the base station receives the preamble from the 48th preamble to the 51st preamble, it indicates that the paging occasion of the half-duplex user equipment is 0. Therefore, when scheduling the uplink subframe, the subframe cannot be allocated to the subframe. User equipment.

It can be seen that in this embodiment, the paging subframe of the base station user equipment is notified by a predetermined packet pattern in the PRACH time-frequency resource block.

Those skilled in the art will appreciate that the above description is merely exemplary and is not intended to limit the invention. For example, different numbers of preambles can be configured for different paging occasions, and it is not required to reserve the 48th preamble to the 63rd preamble to the half-duplex user equipment, but can be designed as needed. All belong to the scope of the disclosure of the embodiments of the present invention.

FIG. 5 shows a schematic diagram of a configuration of a PRACH time-frequency resource block according to an implementation form. In FIG. 5, the preamble of the half-duplex user equipment and the preamble of the full-duplex user equipment are located in a PRACH time-frequency resource block corresponding to the type of the paging subframe, and each PRACH time-frequency resource block The predetermined configuration indicates a corresponding type of paging subframe. For example, there are four types of possible paging occasions for half-duplex user equipment in the existing LTE system, so a part of the preamble can be reserved for the half-duplex user in the corresponding four PRACH resources F1, F2, F3, and F4. Equipment. For example, each PRACH resource reserves 16 preambles for the half-duplex user equipment. Then, the 48th to 63rd preambles in the F1 resource are reserved for paging occasion 0; the 48th to 63rd preambles in the F2 resource are reserved for paging occasion 4; 48th to 63th of the F3 resources The preamble is reserved for paging occasion 5; the 48th to 63th preambles in the F4 resource are reserved for paging occasion 9. In this way, after receiving a special preamble, the base station can determine whether the user equipment is a half-duplex user equipment and what its paging occasion is. Of course, the description herein is merely exemplary. Those skilled in the art can understand that the embodiment of the present invention does not require that the number of preambles reserved for each PRACH resource block must be 16, and each resource is not The preamble reserved in the block is limited to 48th to 63th, but can be designed as needed. It can be seen that in this implementation form, a predetermined type of paging subframe is indicated by a predetermined configuration of each PRACH time-frequency resource block.

It is also possible that the preamble of the half-duplex user equipment is located in a PRACH time-frequency resource block different from the preamble of the full-duplex user equipment, and the predetermined configuration is a pre-in the PRACH time-frequency resource block. Determined grouping mode. Figure 6 shows a configuration diagram of a PRACH time-frequency resource block according to an implementation form.

In the example shown in Figure 6, a PRACH time-frequency HI is reserved for the half-duplex user equipment. In this case, the paging sub-frame of the half-duplex user equipment of the base station can be notified by using a specific packet mode of the time-frequency resource. For example, if a PRACH time-frequency resource block includes 64 preambles, the number of preambles that can be used by the half-duplex user equipment is 64 for the time-frequency resource block HI. Then, the system can reserve the 0th to 15th preambles to paging occasion 0; reserve the 16th to 31st preambles to paging occasion 4; reserve the 32nd to 47th preambles Give paging occasion 5; the remaining preambles from No. 48 to No. 63 are reserved for paging occasion 9. Thus, after receiving a special preamble, the base station can determine whether the user equipment is a half-duplex user equipment and what its paging occasion is.

Similarly, the embodiments of the present invention do not require that the same number of preambles must be allocated for each paging occasion, but can be adjusted and designed as needed, without affecting the essence of the present invention.

It is also possible that the preamble of the half-duplex user equipment is located in a PRACH time-frequency resource block different from the preamble of the full-duplex user equipment, and the predetermined configuration is different of the PRACH time-frequency resource blocks. FIG. 7 shows a schematic diagram of a configuration of a PRACH time-frequency resource block according to an implementation form.

In the example shown in FIG. 7, different PRACH time-frequency resource blocks HI, H2, H3, and H4 are reserved for half-duplex user equipment, and each time-frequency resource block corresponds to a paing occasion, for example, a resource block HI. All 64 preambles are reserved for paging occasion 0; 64 preambles of resource block H2 are reserved for paging occasion 4; 64 preambles of resource block H3 are reserved for paging occasion 5; 64 for resource block H4 All preambles are reserved for paging occasion 9. Thus, after receiving a special preamble, the base station can determine whether the user equipment is a half-duplex user equipment and what its paging occasion is.

It is also possible, for example, to reserve two PRACH time-frequency resource blocks HI and H2 for the half-duplex user equipment, and reserve a part of the preamble to the paging occasion 0 in the resource block HI, and part of the preamble to the paging occasion 4, and A part of the preamble is reserved in the resource block H2 for paging occasion 5, a part of the preamble is given to paging occasion 9, and so on. In the above description, the preamble of the half-duplex user equipment in the embodiment of FIG. 4 and FIG. 5 is located in the same PRACH time-frequency resource block as the pre-code of the full-duplex user equipment, and the implementation of FIG. 6 and FIG. For example, the preamble of the half-duplex user equipment and the preamble of the full-duplex user equipment are located in different PRACH time-frequency resource blocks, and those skilled in the art can easily think that these methods can be arbitrarily combined, for example, a part of half-duplex. The preamble of the user equipment is located in the same PRACH time-frequency resource block as the preamble of the full-duplex user equipment, and the preamble of the other part of the half-duplex user equipment is located in the PRACH time-frequency of the preamble different from the full-duplex user equipment. In the resource block. As long as the base station is able to determine the paging subframe of the half-duplex user equipment according to these predetermined configurations, it is within the scope of the embodiments of the present invention.

Correspondingly, the embodiment of the present invention further provides a method for determining a paging subframe of a half-duplex user equipment, including: the user equipment notifying a base station of the paging subframe by using a preamble, where the preamble There is a predetermined configuration that enables the base station to determine the paging subframe according to the predetermined configuration.

With the method according to the embodiment of the present invention, the base station can know the paging subframe of the user equipment in advance according to the preamble, so that the uplink subframe different from the paging subframe can be allocated to the user equipment when scheduling, effectively avoiding A conflict that may occur when a half-duplex user equipment is connected to a full-duplex FDD system.

For details on how to configure the preamble in the method, the paging sub-frame of the user equipment can be determined according to the preamble. For details, refer to the detailed description in the previous embodiment, and details are not described herein.

In addition, the inventor has noted that when the half-duplex user equipment is in the idle state, if the downlink paging subframe collides with the uplink PRACH subframe, a mechanism is needed to handle this. Therefore, according to an embodiment of the present invention, a method for resolving a collision between a paging subframe and an uplink subframe is also proposed. The method can be implemented on the UE side. Figure 8 shows a flow chart of a method in accordance with an embodiment of the present invention. It can be seen that the method comprises the following steps:

Step 810: Determine whether a PRACH subframe and a paging subframe of the user equipment collide; and in step 820, when the collision occurs, processing the paging subframe or the PRACH subframe according to different priorities. For example, prior to implementing the method of the embodiments of the present invention, priority has been given to paging subframes and PRACH subframes. For example, the paging subframe may be given a higher priority such that in the event of a collision, the user equipment preferentially processes the paging subframe, i.e., postpones the transmission of information transmitted on the physical random access channel subframe. It is also possible to assign a higher priority to the PRACH subframe, so that in the event of a collision, the user equipment preferentially processes the PRACH subframe and performs random access without receiving the information carried by the paging subframe.

The method for the collision between the paging subframe and the PRACH subframe when the half-duplex user equipment is in an idle state can be solved by the method of the embodiment of the present invention. It should be noted that the above embodiments may be implemented independently or in combination with each other. For example, a PRACH subframe may be given a higher priority in advance. In this way, when the half-duplex user equipment transitions from the idle state to the connected state, if the PRACH subframe conflicts with the paging subframe, the information on the PRACH subframe can be preferentially processed, so that the bearer on the PRACH subframe can be performed. The preamble is sent to the base station. Therefore, the base station can determine the paging subframe of the user equipment according to the predetermined configuration of the preamble, so as to avoid the conflict between the paging subframe of the user equipment and other uplink subframes in the subsequent scheduling.

Correspondingly, an embodiment of the present invention further provides a base station. Fig. 9 shows a schematic structural diagram of a base station according to an embodiment of the present invention. It can be seen that the base station 900 includes: a receiving unit 910, configured to receive a preamble from the user equipment, where the preamble has a predetermined configuration, and a determining unit 920, configured to determine, according to the predetermined configuration, Paging sub-frames.

According to an implementation form, the base station 900 further includes: a scheduling unit 930, configured to schedule, according to the determined paging subframe, an uplink subframe that carries a radio resource control RRC connection request, so that the uplink subframe and the homing The caller frame occupies different subframes.

Correspondingly, an embodiment of the present invention also provides a half-duplex user equipment. Fig. 10 shows a schematic structural diagram of a half duplex user equipment according to an embodiment of the present invention. It can be seen that the half-duplex user equipment 1000 includes: a sending unit 1010, configured to notify a base station of a paging subframe of the user equipment by using a preamble, where the preamble has a predetermined configuration, so that the base station can be configured according to the The predetermined configuration is used to determine the paging subframe.

According to an implementation form, the half-duplex user equipment 1000 further includes: a processing unit 1020, configured to preferentially process the PRACH subframe when the PRACH subframe and the paging subframe of the user equipment collide, so that the PRACH subframe can be used. The preamble carried on the uplink is sent to the base station.

The embodiment of the invention also proposes a half-duplex user equipment. Figure 11 shows a schematic block diagram of a half-duplex user equipment 1100 in accordance with an embodiment of the present invention. It can be seen that the half-duplex user equipment 1100 includes: a determining unit 1110, configured to determine whether a collision subframe between the PRACH subframe and the user equipment conflicts; and a processing unit 1120, configured to: The priority handles the paging subframe or the PRACH subframe.

For specific details of the foregoing apparatus embodiments, reference may be made to the relevant parts of the foregoing method embodiments, and details are not described herein again.

It should be understood by those skilled in the art that the division of the device modules in the embodiments of the present invention is functional division, and the actual specific structure may be the splitting or merging of the above functional modules.

The serial numbers of the embodiments of the present invention are merely for the description, and do not represent the advantages and disadvantages of the embodiments. The solution described in the claims is also the scope of protection of the embodiments of the present invention.

One of ordinary skill in the art will appreciate that all or part of the processing in the above-described embodiments can be accomplished by instructions to the associated hardware, which can be stored in a computer readable storage medium.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Rights request

A method for determining a paging subframe of a half-duplex user equipment, comprising:

Receiving a preamble from the user equipment, wherein the preamble has a predetermined configuration; and determining the paging subframe based on the predetermined configuration.

The method according to claim 1, wherein after determining the paging subframe according to the predetermined configuration, the method further includes:

When the scheduling is performed, an uplink subframe is allocated to the user equipment, where the uplink subframe and the paging subframe are different.

The method according to claim 1 or 2, wherein the preamble and the preamble of the full duplex user equipment are located in one physical random access channel PRACH time-frequency resource block, and the predetermined configuration is Predetermined packet mode in the PRACH time-frequency resource block.

The method according to claim 1 or 2, wherein the preamble and the preamble of the full duplex user equipment are located in a PRACH time-frequency resource block corresponding to the type of the paging subframe, and each The predetermined configuration of the PRACH time-frequency resource block indicates a corresponding type of paging subframe.

The method according to claim 1 or 2, wherein the preamble is located in a PRACH time-frequency resource block different from a preamble of a full-duplex user equipment, and the predetermined configuration is the PRACH time-frequency. A predetermined grouping pattern in a resource block.

The method according to claim 1 or 2, wherein the preamble is located in a PRACH time-frequency resource block different from a preamble of a full-duplex user equipment, and the predetermined configuration is different from the PRACH Time-frequency resource block.

The method according to any one of claims 1 to 6, further comprising: scheduling, according to the paging subframe, an uplink subframe that carries a radio resource control RRC connection request, so that the scheduled uplink subframe is The paging subframe occupies different subframes.

A method for determining a paging subframe of a half-duplex user equipment, comprising: the user equipment notifying a base station of the paging subframe by using a preamble, wherein the preamble has a predetermined configuration, so that The base station can determine the paging subframe according to the predetermined configuration.

9. The method according to claim 8, wherein an uplink subframe allocated by the base station to the user equipment is different from the paging subframe when scheduling is performed.

10. The method according to claim 8 or 9, wherein the preamble and the preamble of the full duplex user equipment are located in one physical random access channel PRACH time-frequency resource block, and the predetermined configuration is Predetermined packet mode in the PRACH time-frequency resource block.

The method according to claim 8 or 9, wherein the preamble and the preamble of the full duplex user equipment are located in a PRACH time-frequency resource block corresponding to the type of the paging subframe, and each The predetermined configuration of the PRACH time-frequency resource block indicates the corresponding type of paging subframe.

12. The method according to claim 8 or 9, wherein the preamble is located in a PRACH time-frequency resource block different from a preamble of a full-duplex user equipment, and the predetermined configuration is the PRACH time-frequency A predetermined grouping pattern in a resource block.

13. The method according to claim 8 or 9, wherein the preamble is located in a PRACH time-frequency resource block different from a preamble of a full-duplex user equipment, and the predetermined configuration is different of the PRACH Time-frequency resource block.

The method according to any one of claims 8 to 13, further comprising: preferentially processing the PRACH subframe when the PRACH subframe and the paging subframe of the user equipment collide, so that the PRACH subframe can be The preamble carried is sent to the base station.

15. A method for handling a collision between a paging subframe and an uplink subframe, comprising:

Determining whether a PRACH subframe of the physical random access channel and a paging subframe of the user equipment collide; and when a collision occurs, processing the paging subframe or the PRACH subframe according to different priorities.

16. A base station, comprising:

a receiving unit, configured to receive a preamble from the user equipment, where the preamble has a predetermined configuration,

a determining unit, configured to determine the paging subframe according to the predetermined configuration.

17. The base station of claim 16, further comprising:

And a scheduling unit, configured to schedule, according to the determined paging subframe, an uplink subframe that carries a radio resource control RRC connection request, so that the uplink subframe and the paging subframe occupy different subframes.

A half-duplex user equipment, comprising: a sending unit, configured to notify a base station of a paging subframe of the user equipment by using a preamble, wherein the preamble has a predetermined configuration, so that the base station can be configured according to The predetermined configuration is used to determine the paging subframe.

19. The half-duplex user equipment of claim 18, further comprising:

a processing unit, configured to preferentially process when a PRACH subframe and a paging subframe of the user equipment collide

The PRACH subframe enables the preamble carried on the PRACH subframe to be transmitted to the base station.

20. A half-duplex user equipment, comprising:

a determining unit, configured to determine whether a conflict occurs between the PRACH subframe and a paging subframe of the user equipment;

The processing unit is configured to process the paging subframe or the PRACH subframe according to different priorities when a collision occurs.