CN108811170A - A kind of on-demand method, apparatus and system for obtaining system message - Google Patents

Abstract

A kind of on-demand method, apparatus and system for obtaining system message；It is described obtain system message method include：User equipment (UE), if being triggered link setup, executes link setup process during obtaining system message on demand, and system message request instruction is sent during link setup；Base station asks instruction to send system message according to system message, and the UE then receives requested system message after link setup success.The application can complete to obtain system message on demand under the scene that conflicts.

Description

A method, device and system for obtaining system information on demand

technical field

The invention relates to the field of wireless communication, in particular to a method, device and system for acquiring system information on demand.

Background technique

In LTE (Long Term Evolution, long-term evolution), each cell will broadcast its own system information. When UE (User Equipment, user equipment) moves to a new cell, it must receive the message of the new cell before camping. system information. That is, the validity of the system message is at the cell level. Under LTE, system information mainly includes basic information for camping and access: MIB (Master Information Block, Master Information Block)/SIB (System Information Block, System Information Block) 1/SIB2, SIB3 for cell reselection /4/5 information, of course, also includes other system information such as SIB6~SIB21.

Among these system messages, the MIB will be broadcast on fixed time-frequency resource blocks. The MIB message mainly includes the system frame number, bandwidth, and related information required to receive SIB1, such as PHICH (Physical Hybrid ARQ Indicator Channel, physical hybrid automatic repeater transmission indication channel) config (configuration) and so on. The time domain position of the SIB1 message is fixed, that is, it starts at SFN (System Frame Number, system frame number)/8=0 and repeats sending at SFN/2=0, the subframe number is #5, and the frequency domain position is According to the dynamic scheduling of the current resource state, the SIB1 message mainly contains cell selection information and scheduling information of other SIBs. After receiving SIB1, UE can receive other SIB information according to the scheduling information. In LTE, SIBs with the same scheduling period are usually placed in the same SI (System Information, system message) and sent in the same transport block at the same time. For the change of the system message, the base station will use Paging (paging) or the systemValueTag (system value tag) in SIB1 to indicate. At the same time, the valid time of the system message is also set in LTE. When the clock times out, the system message will be invalid.

In 5G (5th Generation, fifth-generation mobile communication), in order to meet the performance index of 5G, system messages in the 5G system have undergone relatively large changes. The most important changes are as follows: In order to meet the fast access, system information is divided into two parts, one part is MSI (Minimum SI, minimum system information), and the rest is collectively called OSI (Other SI, other system information). The MSI includes necessary information for initial access of the UE, corresponding to MIB/SIB1/SIB2 in the LTE system. For OSI, it is divided into two categories, one is periodic broadcast, and the other is on-demand acquisition, and this classification information will be indicated in the scheduling information of SIB1. There are two ways to obtain on-demand. One is to obtain by sending the first message Msg1 by the UE, that is, to indicate the SI to be obtained through Msg1. The other is obtained through the third message Msg3.

For the first scheme, the system message request indication is carried by Msg1. At this time, the UE indicates the requested SI information through Msg1, namely Preamble (preamble sequence), and the mapping relationship between Msg1 and SI will be broadcast in MinimunSI. After sending Msg1, the UE starts to detect SI according to the scheduling information, and if the detection fails, it will re-initiate the request. The advantage of this solution is that only one Msg1 is needed, and the network does not need to send RAR (Random Access Response, Random Access Response) to allocate the uplink resources required to send Msg3, and the UE does not need to send Msg3, which greatly reduces UE It also saves downlink resources; the disadvantage is that the network needs to reserve a certain preamble for SI requests, which reduces the randomness of preambles for other purposes to some extent and increases the probability of collision.

For the second scheme, that is, the scheme of carrying a system message request through Msg3. In this solution, the UE will first initiate a Preamble. The selection of this Preamble is similar to that in LTE. Then the base station replies with RAR, which indicates the uplink resource block for sending Msg3. The UE then sends the Msg3 message on the resource block indicated by the RAR. Msg3 will carry the Bitmap (bitmap) of all requested system messages, and then the UE detects the SI according to the scheduling information, and if the detection fails, it will re-initiate the request information. This solution does not need to reserve Preamble resources, but needs to deliver RAR, and the UE needs to send Msg3, which increases the power consumption of the UE.

Combining the above analysis of the advantages and disadvantages of the two schemes, for the system message indicating the mapping relationship between Msg1 and SI, the Msg1 method is used to obtain, while the others are obtained by Msg3. Under this consensus, the process of obtaining system information under the 5G system and LTE/2G/3G have undergone great changes. In the LTE/2G/3G system, the system message is sent by broadcast, and the UE only needs to receive it at a fixed time point according to the scheduling information, that is, the acquisition of the system message is only a one-way receiving process. In the 5G system, due to the newly introduced on-demand acquisition system information mechanism, the UE will first send a request indication to the network, and then the network will broadcast the corresponding system information according to the UE's instruction, so the process of on-demand acquisition system information includes the request A two-way process with responses instead of a one-way process with only receive. With the introduction of the two-way process of request and response, the related process of system messages will become more complicated, which will also increase many conflict scenarios. It is necessary to further consider the mechanism of on-demand acquisition in 5G and other idle (idle) The collision that triggers the random access procedure in the state.

Scenarios that trigger UE to initiate random access in the Idle state are mainly divided into the following two scenarios (excluding the newly introduced random access process triggered by obtaining system messages on demand):

(1) Receive different types of Paging instructions from the network during the system message request process: process accordingly according to the content of the Paging; Paging messages can be divided into two categories, one is used to indicate system message changes and EWTS (Earthquake and Tsunami Warning System, earthquake and tsunami warning system)/CMAS (CommercialMobile Alert System, commercial mobile alert system)/EAB (Extended Access Barring, extended access restriction), etc., this type of Paging, UE does not need to initiate access after receiving it, and another The category is the paging triggered by MT CALL (Mobile Terminated CALL, mobile station is called) or MT (Mobile Terminated, mobile station terminated) data (data). For this type of paging, the UE should immediately initiate the link establishment process.

(2) Actively initiate random access triggered by service requests, such as calling, actively uploading data services, etc.

Currently, no suitable solution has been provided for the above conflict scenarios.

Contents of the invention

The present application provides a method, device and system for obtaining system information on demand, which can complete obtaining system information on demand in a conflict scenario.

The embodiment of this application provides a method for obtaining system information on demand, including:

In the process of obtaining system information on demand, if the user equipment UE is triggered to establish a link, it will execute the link establishment process, and send a system information request indication during the link establishment process;

The UE receives the requested system message.

Optionally, the process of obtaining system messages on demand includes:

After the UE initiates a preamble sequence and indicates a system message request in the preamble sequence, it is waiting to receive all system messages;

The UE is in the process of initiating a preamble sequence and waiting for a random access response;

The UE sends a third message, and the third message carries a system message request indicating that it is waiting for all system messages to be received.

Optionally, the triggered link building includes:

The UE triggers the called procedure due to receiving the paging;

The calling process triggered by the UE due to data or signaling.

Optionally, the execution of the link building process includes:

The UE sends a third message Msg3 after receiving the random access response, which carries a radio resource control connection request;

After receiving the conflict resolution message and the radio resource control connection establishment message, the UE sends a radio resource control connection establishment complete message;

Wherein, the UE carries a system information request indication in Msg3 or in a radio resource control connection establishment complete message.

Optionally, after the chain building is triggered and before the chain building process is executed, the method further includes:

If the UE is in the process of waiting for the random access response, it does not clear the previous Preamble operation, and continues to wait for the random access response; if it is not in the process of waiting for the random access response, it clears all the previous processes and initiates a new Preamble request .

Optionally, receiving the requested system message by the UE includes:

The UE receives the requested system message through dedicated signaling;

or,

The UE receives the requested system message from broadcast at the scheduled time.

A method for obtaining system messages on demand, including:

The base station performs a link establishment process after the user equipment UE requests link establishment, and receives a system message request indication sent by the UE during the link establishment process;

The base station sends the system information requested by the UE according to the system information request indication.

Optionally, the execution of the link building process includes:

The base station sends a random access response to the UE;

After receiving the third message Msg3 carrying the radio resource control connection request sent by the UE, the base station sends a conflict resolution message and a radio resource control connection establishment message to the UE;

The base station receives a radio resource control connection establishment complete message sent by the UE;

Wherein, the base station obtains the system message request indication from the Msg3 or the radio resource control connection establishment complete message.

Optionally, sending the system message requested by the UE includes:

Sending the system information requested by the UE through dedicated signaling.

Optionally, when Msg3 carries a system message request indication, the method further includes:

If the base station does not receive the radio resource control connection establishment completion message until the preset time expires, it will send the system message requested by the UE at the scheduled time in a periodic broadcast manner.

A method for obtaining system messages on demand, including:

When the user equipment UE is in the process of obtaining system information on demand, if link building is triggered, the UE and the base station perform a link building process, and send a system message request indication during the link building process;

The base station sends the system information requested by the UE according to the system information request indication.

Optionally, the process of establishing a link between the UE and the base station includes:

The UE sends a third message Msg3 after receiving the RAR from the base station, which carries a radio resource control connection request;

The base station sends a conflict resolution message and a radio resource control connection establishment message to the UE;

The UE sends a radio resource control connection establishment complete message to the base station;

Wherein, the UE carries a system information request indication in Msg3 or in a radio resource control connection establishment complete message.

A device for obtaining system information on demand, comprising:

The link building module is used to execute the link building process when the user equipment UE is in the process of obtaining system information on demand, if the link building is triggered, and send the system message request indication during the link building process;

The receiving module is configured to receive the requested system message.

Optionally, the execution of the link building process includes:

The link building module sends the third message Msg3 after receiving the random access response, which carries the radio resource control connection request; after receiving the conflict resolution message and the radio resource control connection establishment message, sends the radio resource control connection establishment complete message; wherein, in Msg3, or in the radio resource control connection establishment completion message, the system message request indication is carried.

A device for obtaining system information on demand, comprising:

An interaction module, configured to execute a link establishment process after the user equipment UE requests link establishment, and receive a system message request indication sent by the UE during the link establishment process;

A sending module, configured to send the system message requested by the UE according to the system message request indication.

Optionally, the execution of the link building process includes:

The interaction module sends a random access response to the UE; after receiving the third message Msg3 carrying a radio resource control connection request sent by the UE, sends a conflict resolution message and a radio resource control connection establishment message to the UE ; receiving a radio resource control connection establishment complete message sent by the UE; where the system message request indication is obtained from the Msg3 or the radio resource control connection establishment complete message.

A device for obtaining system information on demand, comprising:

a first processor and a first memory;

The first memory is used to store a first program;

The first processor is configured to execute the first program to implement the following operations:

When the user equipment UE is in the process of obtaining system information on demand, if the UE is triggered to establish a link, execute the link establishment process, and send a system information request indication during the link establishment process;

Receive the requested system message.

Optionally, the execution of the link building process includes:

After receiving the random access response, send the third message Msg3, which carries the radio resource control connection request; after receiving the conflict resolution message and the radio resource control connection establishment message, send the radio resource control connection establishment completion message; where, in Msg3, or the radio resource control connection establishment completion message carries the system message request indication.

A device for obtaining system information on demand, comprising:

a second processor and a second memory;

The second memory is used to store a second program;

The second processor is configured to execute the second program to implement the following operations:

After the user equipment UE requests to establish a link, perform a link establishment process, and receive a system message request indication sent by the UE during the link establishment process;

Sending the system message requested by the UE according to the system message request indication.

Optionally, the execution of the link building process includes:

Send a random access response to the UE; after receiving the third message Msg3 carrying a radio resource control connection request sent by the UE, send a conflict resolution message and a radio resource control connection establishment message to the UE; receive the The radio resource control connection establishment complete message sent by the UE; wherein, the system information request indication is obtained from the Msg3 or the radio resource control connection establishment complete message.

A system for obtaining system information on demand, including: a user equipment UE and a base station;

When the UE is in the process of obtaining system information on demand, if link establishment is triggered, the UE and the base station perform a link establishment process, and send a system information request indication during the link establishment process;

The base station sends the system information requested by the UE according to the system information request indication.

Optionally, the process of establishing a link between the UE and the base station includes:

The UE sends a third message Msg3 after receiving the RAR from the base station, which carries a radio resource control connection request;

The base station sends a conflict resolution message and a radio resource control connection establishment message to the UE;

The UE sends a radio resource control connection establishment complete message to the base station;

Wherein, the UE carries a system information request indication in Msg3 or in a radio resource control connection establishment complete message.

The embodiment of the present application can effectively solve the conflict between the acquisition of system information and other random access processes, so that the acquisition of system information is performed in parallel with other random access processes, and the acquisition of system information is reduced while completing other random access processes. delay.

Additional features and advantages of the application will be set forth in the description which follows, and, in part, will be obvious from the description, or may be learned by practice of the application. The objectives and other advantages of the application will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Description of drawings

The accompanying drawings are used to provide a further understanding of the technical solution of the present application, and constitute a part of the specification, and are used together with the embodiments of the present application to explain the technical solution of the present application, and do not constitute a limitation to the technical solution of the present application.

FIG. 1 is a flowchart of a method for obtaining system information in Embodiment 1;

FIG. 2 is a flowchart of a method for obtaining system information in Embodiment 2;

FIG. 3 is a flowchart of a method for obtaining system information in Embodiment 3;

Fig. 4 is the flow chart of obtaining system message in implementation example 1;

Fig. 5 is the flow chart of obtaining system message in implementation example 2;

Fig. 6 is the flow chart of obtaining system message in implementation example 3;

Fig. 7 is the flow chart of obtaining system message in implementation example 4;

Fig. 8 is a flow chart of acquiring system messages in implementation example 5;

FIG. 9 is a schematic diagram of an apparatus for obtaining system information in Embodiment 4;

Fig. 10 is a schematic diagram of an apparatus for acquiring system information in Embodiment 5.

Detailed ways

In order to make the purpose, technical solution and advantages of the application clearer, the embodiments of the application will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

The steps shown in the flowcharts of the figures may be performed in a computer system, such as a set of computer-executable instructions. Also, although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that shown or described herein.

The solution in this embodiment is applicable to all scenarios of obtaining system messages on demand in NR (New Radio, wireless access in 5G), and these scenarios include a sending solution based on Msg1 and a sending solution based on Msg3.

A brief introduction of Msg1, Msg2, Msg3, and Msg5 appearing in this article is shown in the table below.

Table 1. Message Introduction

Abbreviation Chinese Corresponding to 3gpp protocol Msg1 first message Preamble Msg2 second message Random Access Response Msg3 third message RRCConnection request Msg5 fifth message RRCConnectionSetupComplete

Embodiment 1. A method for obtaining system information on demand, as shown in FIG. 1 , includes:

S110. When the UE is in the process of acquiring system information on demand, if link building is triggered, execute the link building process, and send a system message request indication during the link building process;

S120. The UE receives the requested system message.

In this embodiment, the system information request indication may be used to indicate the system information requested by the UE, and may be but not limited to be a Bitmap indication of the requested system information.

Optionally, the UE's process of obtaining system information on demand may include:

After the UE initiates a preamble sequence and indicates a system message request in the preamble sequence, it is waiting to receive all system messages;

The UE is in the process of initiating a preamble sequence and waiting for a random access response;

The UE sends Msg3 and carries a system message request indication in Msg3 and is in the process of waiting for all system messages to be received.

Optionally, the situation that the link establishment is triggered may include: the UE triggers the called process due to receiving a paging, such as receiving a Paging instruction that triggers link establishment, or the UE triggers the calling process due to data or signaling, such as the UE receiving A link establishment request triggered by the upper layer of the UE.

Wherein, in the case of receiving the Paging indication triggering link establishment, the UE may receive the Paging indication MT data.

Wherein, if the Paging does not trigger the UE to establish a link, the Paging process and the system message request process are performed synchronously.

Optionally, the execution of the link building process may include:

After receiving the RAR, the UE sends Msg3, which carries a radio resource control connection request;

After receiving the conflict resolution message and the radio resource control connection establishment message, the UE sends a radio resource control connection establishment complete message;

Wherein, the UE carries a system information request indication in Msg3 or in a radio resource control connection establishment complete message.

In this optional solution, it is the operation performed by the UE during the link establishment process. In practical applications, the base station also needs to perform corresponding operations to interact with the UE.

Wherein, the Msg3 may be sent on the uplink resource block specified by the RAR.

Optionally, after being triggered to establish a link and before receiving RAR, it may also include:

If the UE is waiting for the random access response, it does not clear the previous Preamble operation and continues to wait for the random access response; if it is not waiting for the random access response, it clears the previous Preamble process and initiates a new Preamble request .

Wherein, the Preamble process before ending may be to clear the relevant parameters of the current Preamble counter to 0.

Wherein, after the link establishment is triggered and before receiving the RAR, the UE may continue to wait for the RAR instead of ending the previous Preamble procedure.

Optionally, receiving the requested system message by the UE includes:

The UE receives the requested system message through dedicated signaling;

or,

The UE receives the requested system message from broadcast at the scheduled time.

In this optional solution, the UE may receive the requested system information through dedicated signaling when the link establishment is successful; and receive the requested system information from broadcast at the scheduled time when the link establishment fails.

Embodiment 2. A method for obtaining system information on demand, as shown in FIG. 2 , includes:

S210. After the UE requests link establishment, the base station executes a link establishment process, and receives a system message request indication sent by the UE during the link establishment process;

S220. The base station delivers the system information requested by the UE according to the system information request indication.

In this embodiment, the system information request indication may be used to indicate the system information requested by the UE, and may be but not limited to be a Bitmap indication of the requested system information.

In this embodiment, the situation where the UE requests link establishment may include, but is not limited to:

The UE initiates a Preamble request and the UE has been triggered to establish a link; where the UE is triggered to establish a link may include: the UE triggers the called process due to receiving a paging, such as receiving a Paging instruction that triggers link establishment, or the UE is triggered by data or Signaling triggers the calling process, for example, the UE receives a link establishment request triggered by the upper layer of the UE.

Wherein, in the case of receiving the Paging indication triggering link establishment, the UE may receive the Paging indication MT data.

Wherein, if the Paging does not trigger the UE to establish a link, the Paging process and the system message request process are performed synchronously.

Optionally, the execution of the link building process may include:

The base station sends RAR to the UE;

After receiving the Msg3 carrying the radio resource control connection request sent by the UE, the base station sends a conflict resolution message and a radio resource control connection establishment message to the UE;

The base station receives a radio resource control connection establishment complete message sent by the UE;

Wherein, the base station obtains the system information request indication from the Msg3 or the radio resource control connection establishment complete message.

In this optional solution, it is an operation performed by the base station during link establishment. In practical applications, the UE also needs to perform corresponding operations and interact with the base station.

Wherein, the Msg3 may be sent on the uplink resource block specified by the RAR.

Optionally, sending the system message requested by the UE may include:

Sending the system information requested by the UE through dedicated signaling.

Optionally, when Msg3 carries a system message request indication, the method may further include:

If the base station does not receive the radio resource control connection establishment completion message until the preset time expires, it will send the system message requested by the UE at the scheduled time in a periodic broadcast manner.

That is to say, the base station may send the system information requested by the UE through dedicated signaling when the link establishment is successful; and broadcast the system information requested by the UE periodically at the scheduled time when the link establishment fails.

Embodiment 3. A method for obtaining system information on demand, as shown in FIG. 3 , includes:

S310. When the UE is in the process of obtaining system information on demand, if link establishment is triggered, the UE and the base station perform a link establishment process, and send a system information request indication during the link establishment process;

S320. The base station delivers the system information requested by the UE according to the system information request indication.

In this embodiment, the system information request indication may be used to indicate the system information requested by the UE, and may be but not limited to be a Bitmap indication of the requested system information.

Optionally, the situation that the link establishment is triggered may include: the UE triggers the called process due to receiving a paging, such as receiving a Paging instruction that triggers link establishment, or the UE triggers the calling process due to data or signaling, such as the UE receiving A link establishment request triggered by the upper layer of the UE.

Wherein, in the case of receiving the Paging indication triggering link establishment, the UE may receive the Paging indication MT data.

Wherein, if the Paging does not trigger the UE to establish a link, the Paging process and the system message request process are performed synchronously.

Optionally, performing the link establishment process between the UE and the base station may include:

The UE sends Msg3 after receiving the RAR from the base station, which carries a radio resource control connection request;

The base station sends a conflict resolution message and a radio resource control connection establishment message to the UE;

The UE sends a radio resource control connection establishment complete message to the base station;

Wherein, the UE carries a system information request indication in Msg3 or in a radio resource control connection establishment complete message.

Wherein, the Msg3 may be sent on the uplink resource block specified by the RAR.

Optionally, after being triggered to establish a link and before receiving RAR, it may also include:

The UE clears the relevant parameters of the current Preamble counter to 0, and initiates a new Preamble request.

Among them, clearing the relevant parameters of the current Preamble counter to 0 can be regarded as the end of the Preamble process.

In other optional solutions, after being triggered to establish a link and before receiving the RAR, the UE may continue to wait for the RAR instead of ending the previous Preamble procedure.

Optionally, receiving the requested system message by the UE includes:

The UE receives the requested system message through dedicated signaling;

or,

The UE receives the requested system message from broadcast at the scheduled time.

Wherein, when Msg3 carries a system message request indication, the method may further include:

If the base station does not receive the radio resource control connection establishment completion message until the preset time expires, it will send the system message requested by the UE at the scheduled time in a periodic broadcast manner. In this embodiment, for the solution based on Msg1, the conflict scenario includes the interval between sending the Msg1 request and receiving the SI of the request, or the interval of retransmission due to abnormality, and receiving the Paging indication. After receiving the Paging instruction, the UE can determine the subsequent behavior according to the type of Paging: if the Paging does not trigger the UE to establish a link, the Paging process and the system message request process can be carried out synchronously. And if the Paging process triggers link building, the relevant parameters of the current Preamble counter can be cleared to 0, and a new link building process can be triggered immediately. See below for the execution of the new link building process.

For the Msg1-based solution, the conflict scenario also includes the interval between sending the Msg1 request and receiving the SI of the request, or the interval of retransmission due to abnormality, and receiving the link establishment request triggered by the upper layer of the UE. After receiving the link establishment request triggered by the upper layer of the UE, the UE can clear the relevant parameters of the current Preamble counter to 0, and immediately trigger a new link establishment process. The execution of the new link building process is as follows.

For the scheme based on Msg3, the conflict scenario includes the interval between sending Msg1 request and receiving Msg2 (random access response), or the interval between sending Msg3 and receiving the SI of the request, or retransmission due to abnormality interval, received Paging instructions. After receiving the Paging instruction, the UE can determine the subsequent behavior according to the type of Paging: if the Paging does not trigger the UE to establish a link, the Paging process and the system message request process can be carried out synchronously. And if the Paging process triggers link building and Msg3 has been sent out at this time, you can clear the relevant parameters of the current Preamble counter to 0, and immediately trigger a new link building process. See below for the execution of the new link building process. And if Msg3 has not been sent at this time, UE can continue the process of random access, and carry the RRCConnectionRequest message triggered by Paging in Msg3. There is no need to resend the Preamble here, because in the Msg3-based solution, the previous Preamble and RAR are a common process, and the network side does not know that this Preamble is triggered by obtaining system messages or establishing a link, so it can be used to obtain The random access process triggered by the system message continues to send Msg3. For the carrying of the system message request indication, refer to the description of the link establishment process below.

For the Msg3-based scheme, the conflict scenario also includes the interval between sending the Msg1 request and receiving the Msg2, or the interval between sending the Msg3 and receiving the SI of the request, or the retransmission interval caused by the exception, and the receiving UE A link establishment request triggered by the upper layer. The subsequent behavior after receiving the link establishment request triggered by the upper layer of the UE depends on whether the current Msg3 has been sent. If the Msg3 has been sent, the relevant parameters of the current Preamble counter can be cleared to 0, and a new link establishment process will be triggered immediately. See below for the execution of the new link building process. And if Msg3 has not been sent at this time, UE can continue the process of random access, and carry the RRCConnectionRequest message triggered by Paging in Msg3. There is no need to resend the Preamble here, because in the Msg3-based solution, the previous Preamble and RAR are a common process, and the network side does not know that this Preamble is triggered by obtaining system messages or establishing a link, so it can be used to obtain The random access process triggered by the system message continues to send Msg3. For the carrying of the system message request indication, refer to the description of the link establishment process below.

During the link establishment process, the UE can have the following two options:

(1) Carry the SI request indication in Msg5, such as the Bitmap of the currently requested SI, and then the base station can use a dedicated signal, such as RRCConnectionReconfiguration, to send a system message. If the link establishment fails, the UE can initiate a new Preamble request as needed.

(2) Carry the SI request indication in the Msg3 that Paging triggers the establishment of the link, that is, carry the RRCConnectionRequest and the SI request indication in the Msg3, such as the Bitmap of the currently requested SI, then the base station can use the Dedicated signal if the link establishment is successful after receiving it , such as RRCConnectionReconfiguration to send system messages, and if it fails, system messages can be broadcast.

The two methods (1) and (2) can also be used in combination. For example, Msg3 does not carry the system message request indication when the link is established for the first time, but carries it in Msg5; The Msg3 sent during the second link establishment process carries the system message request indication.

The above-mentioned embodiment is described below with 5 implementation examples. In the following five implementation examples, a gNB (Node B in 5G) is used as a base station, which may not be limited in actual application.

Implementation Example 1

This implementation example is based on the Msg1 scheme, and the process of carrying the SI request indication in Msg5; as shown in Figure 4, the process of obtaining system information includes the following steps 101-108:

Step 101: The UE acquires system information as required, initiates a random access procedure, initiates a Preamble request, and indicates the requested system information through the Preamble.

Step 102: The gNB broadcasts the Paging message triggered by the MT Data, and the UE receives the Paging indicating MT data, and clears the previous Preamble process.

Step 103: The UE initiates a new random access procedure, and initiates a new Preamble request.

Step 104: the gNB issues RAR resources.

Step 105: UE sends Msg3 message on the uplink resource block specified by RAR, and carries RRCConnectionRequest (radio resource control connection request) message triggered by Paging in Msg3.

Step 106-1: gNB sends a conflict resolution message;

Step 106-2: The gNB sends an RRCConnectionSetup (radio resource control connection establishment) message.

Step 107: After receiving the conflict resolution message and the RRCConnectionSetup message, the UE sends Msg5, namely RRCConnectionSetupComplete (radio resource control connection establishment complete) message, and carries the SI request indication, such as the BitMap indication of the requested system message.

Step 108: After receiving the SI request indication, the gNB packages and delivers the system message requested by the UE in the form of Dedicated signal (dedicated signaling), such as RRCConnection reconfiguration (radio resource control connection reconfiguration).

Implementation example 2

This implementation example is based on the Msg1 scheme, and the normal process of carrying the SI request indication in Msg3; as shown in Figure 5, the process of obtaining system information includes the following steps 201-208:

Step 201: The UE obtains system information as required, initiates a random access procedure, initiates a Preamble request, and indicates the requested system information through the Preamble.

Step 202: The gNB broadcasts the Paging message triggered by the MT Data, and the UE receives the Paging indicating MT data, and clears the previous Preamble process.

Step 203: The UE initiates a new random access procedure, and initiates a new Preamble request.

Step 204: the gNB issues RAR resources.

Step 205: The UE sends a Msg3 message on the uplink resource block specified by the RAR, and carries the RRCConnectionRequest message triggered by Paging in the Msg3, and carries the SI request indication, such as the BitMap indication of the requested system message.

Step 206-1: gNB sends a conflict resolution message;

Step 206-2: gNB sends RRCConnection Setup message.

Step 207: After receiving the conflict resolution message and the RRCConnectionSetup message, the UE sends Msg5, namely the RRCConnection Setup Complete message.

Step 208: After receiving the Msg5, the gNB sends the system message information requested by the UE in the form of a Dedicated signal, such as RRCConnectionreconfiguration.

Implementation example 3

This implementation example is based on the Msg1 scheme, and the abnormal flow indicated by the SI request in Msg3; as shown in Figure 6, the flow of obtaining system information includes the following steps 301-308:

Step 301: The UE obtains system information as required, initiates a random access procedure, initiates a Preamble request, and indicates the requested system information through the Preamble.

Step 302: The gNB broadcasts the Paging message triggered by the MT Data, and the UE receives the Paging indicating MT data, and clears the previous Preamble process.

Step 303: The UE initiates a new random access procedure, and initiates a new Preamble request.

Step 304: the gNB issues RAR resources.

Step 305: The UE sends a Msg3 message on the uplink resource block specified by the RAR, and carries the RRCConnectionRequest message triggered by Paging in the Msg3, and carries the SI request indication, such as the BitMap indication of the requested system message.

Step 306-1: gNB sends a conflict resolution message;

Step 306-2: gNB sends RRCConnection Setup message.

Step 307: If the gNB side does not receive the RRCConnectionSetupComplete message until the timer (clock) expires, the gNB clears this link establishment process.

Step 308: The gNB sends the system message requested by the UE at the scheduled time in a periodic broadcast manner.

Implementation Example 4

This implementation example is based on the Msg3 scheme, and the process of carrying the SI request indication in Msg5; as shown in Figure 7, the process of obtaining system information includes the following steps 401-407:

Step 401: UE obtains system information as required, initiates a random access procedure, and initiates a Preamble request.

Step 402: The gNB broadcasts the Paging message triggered by the MT Data, and the UE receives the Paging indicating MT data, and continues to wait for the RAR.

Step 403: the gNB issues RAR resources.

Step 404: UE sends Msg3 message on the uplink resource block specified by RAR, and carries RRCConnectionRequest message triggered by Paging in Msg3.

Step 405: gNB sends conflict resolution message and RRCConnection Setup message.

Step 406: After receiving the conflict resolution message and the RRCConnectionSetup message, the UE sends Msg5, namely the RRCConnection Setup Complete message, and carries the SI request indication, such as the BitMap indication of the requested system message.

Step 407: After receiving the SI request indication, the gNB packages and delivers the system message requested by the UE in the form of Dedicated Signal, such as RRCconnectionreconfiguration.

Implementation example 5

This implementation example is based on the Msg3 scheme, and the normal process of carrying the SI request indication in Msg3; as shown in Figure 8, the process of obtaining system information includes the following steps 501-507:

Step 501: UE obtains system information as required, initiates a random access procedure, and initiates a Preamble request.

Step 502: The gNB broadcasts the Paging message triggered by the MT Data, and the UE receives the Paging indicating MT data, and continues to wait for the RAR.

Step 503: the gNB issues RAR resources.

Step 504: The UE sends a Msg3 message on the uplink resource block specified by the RAR, and carries the RRCConnectionRequest message triggered by Paging in Msg3, and carries the SI request indication, such as the BitMap indication of the requested system message, and clears the previous system message request related process , and clear the relevant parameters of the current Preamble counter to 0.

Step 505-1: gNB sends a conflict resolution message;

Step 505-2: gNB sends RRCConnection Setup message.

Step 506: After receiving the conflict resolution and the RRCConnectionSetup, the UE sends Msg5, namely the RRCConnection Setup Complete message.

Step 507: According to the SI request indication carried in Msg3, the gNB packages and delivers the system message requested by the UE in the form of Dedicated Signal, such as RRCConnection ReConfiguration.

Embodiment 4. An apparatus for obtaining system information on demand, as shown in FIG. 9 , includes:

The link building module 41 is used to execute the link building process when the UE is in the process of obtaining system information on demand, if the link building is triggered, and send the system message request indication during the link building process;

The receiving module 42 is configured to receive the requested system message.

The apparatus in this embodiment may be set in a UE.

Optionally, the execution of the link building process may include:

The link building module sends Msg3 after receiving the random access response, which carries a radio resource control connection request; after receiving the conflict resolution message and the radio resource control connection establishment message, sends a radio resource control connection establishment complete message; wherein, In Msg3, or in the radio resource control connection establishment completion message, the system information request indication is carried.

Optionally, the device may also include:

The clearing module is used to clear the relevant parameters of the current Preamble counter and initiate a new Preamble request after the UE is triggered to establish a link and before the link establishment module executes the link establishment process.

Optionally, receiving the requested system message by the receiving module may include:

receiving the requested system message via dedicated signaling;

or,

The requested system message is received from the broadcast at the scheduled time.

For other implementation details, refer to Embodiment 1.

Embodiment 5. An apparatus for obtaining system messages on demand, as shown in FIG. 10 , includes:

The interaction module 51 is configured to execute a link establishment process after the UE requests link establishment, and receive a system message request indication sent by the UE during the link establishment process;

The sending module 52 is configured to send the system message requested by the UE according to the system message request indication.

The device in this embodiment can be set in a base station.

Optionally, the execution of the link building process may include:

The interaction module sends a random access response to the UE; after receiving the third message Msg3 carrying a radio resource control connection request sent by the UE, sends a conflict resolution message and a radio resource control connection establishment message to the UE ; receiving a radio resource control connection establishment complete message sent by the UE; where the system message request indication is obtained from the Msg3 or the radio resource control connection establishment complete message.

Optionally, sending the system message requested by the UE by the sending module may include:

Sending the system information requested by the UE through dedicated signaling.

Optionally, when Msg3 carries a system message request indication, sending the system message requested by the UE by the sending module may also include:

If the base station does not receive the radio resource control connection establishment completion message until the preset time expires, it sends the system message requested by the UE at the scheduled time in a periodic broadcast manner.

For other implementation details, refer to Embodiment 2.

Embodiment 6. A device for obtaining system messages on demand, including:

a first processor and a first memory;

The first memory is used to store a first program;

The first processor is configured to execute the first program to implement the following operations:

When the user equipment UE is in the process of obtaining system information on demand, if it is triggered to establish a link, execute the link establishment process, and send a system information request indication during the link establishment process;

Receive the requested system message.

The device of this embodiment may be set in a UE.

In this embodiment, the program used to initiate the preamble during execution may also be stored in the first memory; the first program may be one program or a group of programs, or a part of a program.

Optionally, the execution of the link building process may include:

After receiving the random access response, send Msg3, which carries the radio resource control connection request; after receiving the conflict resolution message and the radio resource control connection establishment message, send the radio resource control connection establishment complete message; wherein, in Msg3, or The radio resource control connection establishment complete message carries a system message request indication.

Optionally, executing the first program by the first processor may also implement the following operations:

After the UE is triggered to establish the link and before executing the link establishment process, the relevant parameters of the current Preamble counter are cleared to 0, and a new Preamble request is initiated.

Optionally, the receiving the requested system message may include:

receiving the requested system message via dedicated signaling;

or,

The requested system message is received from the broadcast at the scheduled time.

For other implementation details, refer to Embodiment 1.

Embodiment 7. A device for obtaining system messages on demand, including:

a second processor and a second memory;

The second memory is used to store a second program;

The second processor is configured to execute the second program to implement the following operations:

After the UE requests link building, execute a link building process, and receive a system message request indication sent by the UE during the link building process;

Sending the system message requested by the UE according to the system message request indication.

The device in this embodiment can be set in a base station.

In this embodiment, the second program may be one or a group of programs, or a part of one program.

Optionally, the execution of the link building process may include:

Send a random access response to the UE; after receiving the third message Msg3 carrying a radio resource control connection request sent by the UE, send a conflict resolution message and a radio resource control connection establishment message to the UE; receive the The radio resource control connection establishment complete message sent by the UE; wherein, the system information request indication is obtained from the Msg3 or the radio resource control connection establishment complete message.

Optionally, sending the system message requested by the UE may include:

Sending the system information requested by the UE through dedicated signaling.

Optionally, when Msg3 carries a system message request indication, sending the system message requested by the UE may further include:

If the base station does not receive the radio resource control connection establishment completion message until the preset time expires, it sends the system message requested by the UE at the scheduled time in a periodic broadcast manner.

For other implementation details, refer to Embodiment 2.

Embodiment 8, a system for obtaining system information on demand, including: UE and base station;

When the UE is in the process of obtaining system information on demand, if link establishment is triggered, the UE and the base station perform a link establishment process, and send a system information request indication during the link establishment process;

The base station sends the system information requested by the UE according to the system information request indication.

In this embodiment, the UE may include the apparatus in Embodiment 4 or Embodiment 6; the base station may include the apparatus in Embodiment 5 or Embodiment 7.

Optionally, performing the link establishment process between the UE and the base station may include:

The UE sends a third message Msg3 after receiving the RAR from the base station, which carries a radio resource control connection request;

The base station sends a conflict resolution message and a radio resource control connection establishment message to the UE;

The UE sends a radio resource control connection establishment complete message to the base station;

Wherein, the UE carries a system information request indication in Msg3 or in a radio resource control connection establishment complete message.

For other implementation details, refer to Embodiment 3.

Those of ordinary skill in the art can understand that all or some of the steps in the methods disclosed above, the functional modules/units in the system, and the device can be implemented as software, firmware, hardware, and an appropriate combination thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example: one physical component may have multiple functions, or one function or step may be composed of multiple The physical components cooperate to perform. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). As known to those of ordinary skill in the art, the term computer storage media includes both volatile and nonvolatile media implemented in any method or technology for storage of information, such as computer readable instructions, data structures, program modules, or other data. , removable and non-removable media. Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cartridges, magnetic tape, magnetic disk storage or other magnetic storage devices, or can Any other medium used to store desired information and which can be accessed by a computer. In addition, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media .

Although the embodiments disclosed in the present application are as above, the content described is only the embodiments adopted to facilitate understanding of the present application, and is not intended to limit the present application. Anyone skilled in the field of this application can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in this application, but the scope of patent protection of this application must still be The scope defined by the appended claims shall prevail.

Claims (19)

1. A method of acquiring system messages on demand, comprising:

user Equipment (UE) is in the process of acquiring system messages as required, if the UE is triggered to establish a link, a link establishment process is executed, and a system message request indication can be sent according to the current requirement in the link establishment process;

the UE receives the requested system message.

2. The method of claim 1, wherein the UE being in the process of acquiring system messages on demand comprises:

after initiating a leader sequence and indicating a system message request in the leader sequence, the UE waits for all system messages to be collected;

the UE waits for a random access response in the process of initiating a leader sequence;

the UE issues a third message Msg3 and carries a system message request indication in Msg3 in the process of waiting for all system messages to be collected.

3. The method of claim 1, wherein the triggered link establishment comprises:

the UE triggers a called flow because of receiving paging;

the UE triggers the calling process according to data or signaling.

4. The method of claim 1, wherein said performing a link establishment procedure comprises:

the UE sends an Msg3 after receiving the random access response, wherein the Msg3 carries a radio resource control connection request;

after receiving the conflict resolution message and the radio resource control connection establishment message, the UE sends a radio resource control connection establishment completion message;

wherein, the UE carries a system message request indication in the Msg3 or in the rrc connection setup complete message.

5. The method of claim 1, wherein after the triggered link establishment and before the link establishment procedure is performed, further comprising:

if the UE does not clear the previous Preamble operation in the process of waiting for the random access response, continuing to wait for the random access response; if the random access response is not in the process of waiting for the random access response, the previous Preamble process is cleared, and a new Preamble request is initiated.

6. The method of claim 1, wherein the UE receiving the requested system message comprises:

the UE receives the requested system message through dedicated signaling;

or,

the UE receives the requested system message from the broadcast at the scheduled time.

7. A method of acquiring system messages on demand, comprising:

the method comprises the steps that a base station executes a link establishment process after a User Equipment (UE) requests for link establishment, and receives a system message request indication sent by the UE in the link establishment process;

and the base station issues the system message requested by the UE according to the system message request indication.

8. The method of claim 7, wherein the issuing the system message requested by the UE comprises:

and sending the system message requested by the UE through dedicated signaling.

9. The method of claim 7, wherein when the Msg3 carries a system message request indication, the method further comprises:

and if the base station does not receive the radio resource control connection establishment completion message until the preset time is overtime, the base station transmits the system message requested by the UE at the scheduling time in a periodic broadcast mode.

10. An apparatus for acquiring system messages on demand, comprising:

the link establishment module is used for executing a link establishment process and sending a system message request indication in the link establishment process if a link establishment is triggered when User Equipment (UE) is in the process of acquiring the system message as required;

a receiving module for receiving the requested system message.

11. The apparatus of claim 10, wherein the performing the link establishment procedure comprises:

the link building module sends a third message Msg3 after receiving the random access response, wherein the third message Msg3 carries a radio resource control connection request; after receiving the conflict resolution message and the radio resource control connection establishment message, sending a radio resource control connection establishment completion message; wherein, the Msg3 or the rrc connection setup complete message carries a system message request indication.

12. An apparatus for acquiring system messages on demand, comprising:

the system comprises an interaction module, a link establishment module and a link establishment module, wherein the interaction module is used for executing a link establishment process after User Equipment (UE) requests for link establishment and receiving a system message request indication sent by the UE in the link establishment process;

and the sending module is used for sending the system message requested by the UE according to the system message request indication.

13. The apparatus of claim 12, wherein the performing the link establishment procedure comprises:

the interaction module sends a random access response to the UE; after receiving a third message Msg3 carrying a radio resource control connection request sent by the UE, sending a conflict resolution message and a radio resource control connection establishment message to the UE; receiving a radio resource control connection establishment completion message sent by the UE; and acquiring a system message request indication from the Msg3 or a radio resource control connection establishment completion message.

14. An apparatus for acquiring system messages on demand, comprising:

a first processor and a first memory;

the method is characterized in that:

the first memory is used for storing a first program;

the first processor is configured to execute the first program to:

when User Equipment (UE) is in the process of acquiring system messages on demand, if the UE is triggered to establish a link, executing a link establishment process, and sending a system message request indication in the link establishment process;

the requested system message is received.

15. The apparatus of claim 14, wherein the performing the link establishment procedure comprises:

after receiving the random access response, sending a third message Msg3, wherein the third message Msg3 carries a radio resource control connection request; after receiving the conflict resolution message and the radio resource control connection establishment message, sending a radio resource control connection establishment completion message; wherein, the Msg3 or the rrc connection setup complete message carries a system message request indication.

16. An apparatus for acquiring system messages on demand, comprising:

a second processor and a second memory;

the method is characterized in that:

the second memory is used for storing a second program;

the second processor is configured to execute the second program to:

after User Equipment (UE) requests for establishing a link, executing a link establishing process, and receiving a system message request indication sent by the UE in the link establishing process;

and issuing the system message requested by the UE according to the system message request indication.

17. The apparatus of claim 16, wherein the performing the link establishment procedure comprises:

sending a random access response to the UE; after receiving a third message Msg3 carrying a radio resource control connection request sent by the UE, sending a conflict resolution message and a radio resource control connection establishment message to the UE; receiving a radio resource control connection establishment completion message sent by the UE; and acquiring a system message request indication from the Msg3 or a radio resource control connection establishment completion message.

18. A system for acquiring system messages on demand, comprising: user Equipment (UE) and a base station;

the method is characterized in that:

when the UE is in the process of acquiring system messages on demand, if the UE is triggered to establish a link, the UE and the base station execute a link establishment process, and a system message request indication is sent in the link establishment process;

and the base station issues the system message requested by the UE according to the system message request indication.

19. The system of claim 18, wherein the UE performing a link establishment procedure with a base station comprises:

the UE sends a third message Msg3 after receiving the RAR from the base station, wherein the third message Msg3 carries a radio resource control connection request;

the base station sends a conflict resolution message and a radio resource control connection establishment message to the UE;

the UE sends a radio resource control connection establishment completion message to the base station;

wherein, the UE carries a system message request indication in the Msg3 or in the rrc connection setup complete message.