CN109587767B

CN109587767B - On-demand system information request response and receiving method and device, and base station

Info

Publication number: CN109587767B
Application number: CN201710897750.7A
Authority: CN
Inventors: 高兴航; 王化磊
Original assignee: Beijing Ziguang Zhanrui Communication Technology Co Ltd
Current assignee: Beijing Ziguang Zhanrui Communication Technology Co Ltd
Priority date: 2017-09-28
Filing date: 2017-09-28
Publication date: 2021-12-24
Anticipated expiration: 2037-09-28
Also published as: CN109587767A

Abstract

An on-demand system information request response method, an on-demand system information request receiving device and a base station are provided, wherein the on-demand system information request response method comprises the following steps: receiving an on-demand system information request sent by at least one user equipment by using a message 3; configuring identification information in a MAC subheader corresponding to a response message, wherein the identification information is used for indicating that the response message is directed to the on-demand system information request; configuring a feedback message for the on-demand system information request in the response message, wherein the feedback message comprises the received on-demand system information type; and sending the response message as a message 4 at the specified resource position. The technical scheme of the invention can realize the response of the request of the on-demand system information by using the message 3 and avoid the collision between the request of the on-demand system information and the random access.

Description

On-demand system information request response and receiving method and device, and base station

Technical Field

The invention relates to the technical field of communication, in particular to an on-demand system information request responding method, an on-demand system information request receiving method, an on-demand system information request responding device and an on-demand system information request receiving device, and a base station.

Background

Competitive access and non-competitive random access procedures are supported in both Long Term Evolution (LTE) and New Radio (NR) systems.

In LTE contention random access, as shown in fig. 1, the whole process includes the following steps: s1: random access preamble (preamble) transmission; s2: receiving a random access response; s3: message 3(Msg3) transmission; s4: message 4(Msg4) contends for resolution. In step S1, the method is mainly used to notify the base station (eNodeB) that there is a random access request, and at the same time, enable the base station to estimate the transmission delay between the eNodeB and the User Equipment (UE), and calibrate the uplink timing according to the estimated transmission delay, and indicate the uplink timing to the UE through a random access response message. In step S2, the Random access response message is transmitted through a resource location indicated by a Physical Downlink Control Channel (PDCCH) scrambled by a Random Radio Network Temporary Identity (RA-RNTI). The time-frequency position of the lead code determines the value of RA-RNTI; after the UE transmits the preamble, it monitors a corresponding PDCCH according to the RA-RNTI value within a Random Access Response (RAR) time window to receive a Random Access Response of the corresponding RA-RNTI. If the RAR replied by the base station is not received in the RAR time window, the random access process is considered to fail. The random access response message includes a time adjustment amount required for specifying uplink synchronization of the UE, an uplink resource for the UE to transmit the message 3, and a Temporary Cell Radio Network Temporary Identifier (TC-RNTI). The C-RNTI is used for subsequent transmissions by the UE and the base station, and after collision resolution, the value becomes the C-RNTI.

In step S3, Msg3 is transmitted on the uplink Synchronization Channel (UL-SCH), and Msg3 needs to contain important information: a unique flag per UE. This flag will be used for conflict resolution at step S4. For the UE in the connected state, the only mark is C-RNTI; for the UE in the non-connected state, a unique UE Identity (Serving Temporary Mobile Subscriber Identity (S-TMSI)) from the core network or a random number is used as its Identity. In step S4, the UE has a flag carrying its own unique flag at Msg 3: C-RNTI or UE flag from core network. The base station will carry the same content as message 3 in Msg4 in the collision resolution mechanism, different UEs for the same purpose can specify the winning UE by the UE unique flag, and other UEs not winning in collision resolution will re-initiate random access. If the PDCCH received by the UE in Msg4 is scrambled by the TC-RNTI specified in the RAR, when a Contention Resolution Identity MAC Control element (Contention Resolution Identity MAC Control element) of the UE included in a successfully decoded Media Access Control (MAC) layer Protocol Data Unit (PDU) matches a Service Data Unit (SDU) of a Common Control Channel (CCCH) sent by Msg3, the UE considers that the random Access is successful and sets its TC-RNTI to be the C-RNTI.

In NR systems, contention random access may be employed for on-demand system information requests. According to the current conference discussion, the idle state UE or the inactive state UE may employ a message 1(Msg1-based) or a message 3(Msg 3-based) based on-demand system information request. If the base station transmits the random access resource used by the on-demand system information request through the system information broadcast, the UE considers that the request message is to be transmitted through the message 1-based scheme. Otherwise the UE considers that the request message is to be sent by the message 3 based approach. At this time, the Random Access resources (Physical Random Access Channel (PRACH) preamble and PRACH time-frequency resources) used by the UE to send Msg1 are shared with the Random Access resources used by the normal Access UE to send Msg 1. The UE is to confirm whether the transmission of the message 3(Msg3) is successful by receiving a response message sent by the base station. The on-demand system information to be requested may be indicated to the base station in the form of a bit map (bitmap) by a message 3, each bit (bit) representing a specified one or more of the on-demand system information. When idle state or inactive state UE sends request message of system information on demand by using message 3, if there are other UEs using same lead code and random access resource to access process, then collision will occur when sending message 3, and the base station can identify whether the received message 3 is for accessing or requesting system information on demand by using the received message 3, and then sends corresponding response message.

However, in the NR system, if the UE transmits the message 3 only to request the on-demand system information, it is not necessary to perform a contention resolution procedure. Because the UE sending the on-demand system information request message uses the common random access resource to send the message 3 in the random access process, the UE may collide with the UE accessing normally when sending the message 3, and if the LTE mechanism is used, the UE may be decoded incorrectly, thereby causing a failure in the process.

Disclosure of Invention

The technical problem solved by the invention is how to realize the response of the request of the on-demand system information by using the message 3 and avoid the collision between the request of the on-demand system information and the random access.

In order to solve the above technical problem, an embodiment of the present invention provides an on-demand system information request response method, where the on-demand system information request response method includes: receiving an on-demand system information request sent by at least one user equipment by using a message 3, wherein the on-demand system information request comprises an on-demand system information type, and an uplink resource of the message 3 is indicated by a random access response message acquired by the at least one user equipment by using a lead code and a physical random access channel resource; configuring identification information in a MAC subheader corresponding to a response message, wherein the identification information is used for indicating that the response message is directed to the on-demand system information request; configuring a feedback message for the on-demand system information request in the response message, wherein the feedback message comprises the received on-demand system information type; and sending the response message as a message 4 at the specified resource position.

Optionally, the response message is carried in an MAC control unit, and a logical channel identifier used by the MAC control unit is different from a logical channel identifier used by a contention resolution MAC control unit.

Optionally, the MAC control unit and the contention resolution MAC control unit use the same logical channel identifier, and the identifier information is represented by a reserved bit in the MAC subheader.

Optionally, the configuring, in the MAC subheader corresponding to the response message, the identification information includes: and configuring the value of any one bit of the reserved bits to be a first preset value, wherein when the value of the reserved bits is a second preset value different from the first preset value, the response message is for contention resolution.

Optionally, the feedback message further includes at least one historically received on-demand system information type.

Optionally, the response message is a MAC PDU, and configuring a feedback message for the on-demand system information type in the response message includes: the MAC SDUs in the MAC PDUs carry the on-demand system information types of all the received on-demand system information requests.

Optionally, the sending the response message as the message 4 at the specified resource location includes: and sending the response message as a message 4 at a resource position appointed by the PDCCH scrambled by the temporary C-RNTI.

The embodiment of the invention also discloses an on-demand system information request response receiving method, which comprises the following steps: sending an on-demand system information request to a base station by using a message 3, wherein the on-demand system information request comprises an on-demand system information type, and an uplink resource of the message 3 is acquired by using a lead code and a physical random access channel resource; receiving a response message sent by the base station at a specified resource position; receiving a feedback message according to identification information in an MAC subheader corresponding to the response message, wherein the identification information is used for indicating that the response message is for an on-demand system information request received by the base station, the feedback message is configured by the base station for the received on-demand system information request, and the feedback message comprises an on-demand system information type received by the base station; and if the on-demand system information types in the feedback message comprise all on-demand system information types in the on-demand system information request, determining that the message 3 is transmitted successfully.

The embodiment of the invention also discloses an on-demand system information request response device, which comprises: an on-demand system information request receiving module, adapted to receive an on-demand system information request sent by at least one user equipment using a message 3, where the on-demand system information request includes an on-demand system information type, and an uplink resource of the message 3 is acquired by the at least one user equipment using a preamble and a physical random access channel resource; an identification information configuration module, adapted to configure identification information in a MAC subheader corresponding to a response message, where the identification information is used to indicate that the response message is for the on-demand system information request; a feedback message configuration module adapted to configure a feedback message for the on-demand system information request in the response message, the feedback message including the received on-demand system information type; and the response message sending module is suitable for sending the response message as the message 4 at the specified resource position.

The embodiment of the invention also discloses an on-demand system information request response receiving device, which comprises: an on-demand system information request sending module, adapted to send an on-demand system information request to a base station using a message 3, where the on-demand system information request includes an on-demand system information type, and an uplink resource of the message 3 is acquired using a preamble and a physical random access channel resource; a response message receiving module, adapted to receive a response message sent by the base station at a specified resource location; a feedback message receiving module, adapted to receive a feedback message according to identification information in a MAC subheader corresponding to the response message, where the identification information is used to indicate that the response message is for an on-demand system information request received by the base station, the feedback message is configured by the base station for the received on-demand system information request, and the feedback message includes a type of the on-demand system information received by the base station; a first transmission determining module adapted to determine that the message 3 is successfully transmitted when the on-demand system information type in the feedback message includes all on-demand system information types in the on-demand system information request.

The embodiment of the invention also discloses a storage medium, which stores computer instructions, and the computer instructions execute the steps of the on-demand system information request response method when running, or the steps of the on-demand system information request response receiving method.

The embodiment of the invention also discloses a base station, which comprises a memory and a processor, wherein the memory is stored with computer instructions capable of running on the processor, and the processor executes the steps of the on-demand system information request response method when running the computer instructions.

The embodiment of the invention also discloses user equipment which comprises a memory and a processor, wherein the memory is stored with a computer instruction which can be operated on the processor, and the processor executes the step of the on-demand system information request response receiving method when operating the computer instruction.

Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:

the technical scheme of the invention includes that an on-demand system information request sent by at least one user equipment by using a message 3 is received, the on-demand system information request comprises an on-demand system information type, and uplink resources of the message 3 are indicated by a random access response message acquired by the at least one user equipment by using a lead code and physical random access channel resources; configuring identification information in a MAC subheader corresponding to a response message, wherein the identification information is used for indicating that the response message is directed to the on-demand system information request; configuring a feedback message for the on-demand system information request in the response message, wherein the feedback message comprises the received on-demand system information type; and sending the response message as a message 4 at the specified resource position. In the technical scheme of the invention, the base station configures the identification information in the MAC subheader corresponding to the response message, so that the UE can determine whether the response message comprises the feedback message or not through the identification information, thereby avoiding the possible collision problem between the UE requesting the system information on demand and the UE performing normal access, reducing the retransmission of unnecessary message 3 and reducing the power consumption of the UE; and further, the response efficiency of the system information request on demand and the random access response efficiency are improved, and the user experience is improved.

Further, the response message is carried in the MAC control element, and the logical channel identifier used by the MAC control element is different from the logical channel identifier used by the contention resolution MAC control element. The technical scheme of the invention can lead the UE to distinguish the system information request response and the competition resolution identification as required in an implicit mode by configuring the identification information as the logical channel identification which is different from the logical channel identification used by the competition resolution MAC control unit.

Further, the MAC control element and the contention resolution MAC control element use the same logical channel identifier, and the identifier information is represented by reserved bits in the MAC subheader. In the technical scheme of the invention, the base station endows the reserved bit in the existing format with a specific meaning and sets different values, so that the UE can distinguish the on-demand system information request response and the competition resolution identification according to the value of the reserved bit.

Drawings

FIG. 1 is a flow chart of an on-demand system information request response method according to an embodiment of the present invention;

fig. 2 is a flowchart of an on-demand system information request response receiving method according to an embodiment of the present invention;

FIG. 3 is a diagram illustrating an exemplary application scenario of the present invention;

FIG. 4 is a schematic structural diagram of an on-demand system information request responding apparatus according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of an on-demand system information request response receiving apparatus according to an embodiment of the present invention.

Detailed Description

As described in the background art, in the NR system, if the UE transmits the message 3 only to request the on-demand system information, it is not necessary to perform a contention resolution procedure. Because the UE sending the on-demand system information request message uses the common random access resource to send the message 3 in the random access process, the UE may collide with the UE accessing normally when sending the message 3, and if the LTE mechanism is used, the UE may be decoded incorrectly, thereby causing a failure in the process.

Therefore, it is highly desirable to design a response mechanism for the on-demand system information request, so as to implement the response of the on-demand system information request by using the message 3 and avoid the collision between the request of the on-demand system information and the random access.

In the technical scheme of the invention, the base station configures the identification information in the MAC subheader corresponding to the response message, so that the UE can determine whether the response message comprises the feedback message or not through the identification information, thereby avoiding the possible collision problem between the UE requesting the system information on demand and the UE performing normal access, reducing the retransmission of unnecessary message 3 and reducing the power consumption of the UE; and further, the response efficiency of the system information request on demand and the random access response efficiency are improved, and the user experience is improved.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Fig. 1 is a flowchart of an on-demand system information request response method according to an embodiment of the present invention.

The on-demand system information request response method shown in fig. 1 may be used at the base station side, and the on-demand system information request response method may include the following steps:

step S101: receiving an on-demand system information request sent by at least one user equipment by using a message 3, wherein the on-demand system information request comprises an on-demand system information type, and an uplink resource of the message 3 is indicated by a random access response message acquired by the at least one user equipment by using a lead code and a physical random access channel resource;

step S102: configuring identification information in a MAC subheader corresponding to a response message, wherein the identification information is used for indicating that the response message is directed to the on-demand system information request;

step S103: configuring a feedback message for the on-demand system information request in the response message, wherein the feedback message comprises the received on-demand system information type;

step S104: and sending the response message as a message 4 at the specified resource position.

In this embodiment, at least one ue may send an on-demand system information request using a message 3, where an uplink resource of the message 3 is obtained by the at least one ue using a preamble and a physical random access channel resource. Further, the preamble and the physical random access channel resource may also be used for the UE to perform a random access procedure. That is, the UE may perform a random access procedure using the preamble and the physical random access channel resources; then the UE may send the UE identity with message 3 for contention resolution.

Specifically, the UE in the idle state or the inactive state may send the on-demand system information request through the message 3 in the random access process by using the common random access resource, that is, the PRACH preamble and the PRACH time-frequency resource. The network side transmits a feedback message containing all received on-demand system message types as a response message of the received message 3.

In the specific implementation of step S101, the base station may receive an on-demand system information request sent by the user equipment, so as to obtain the type of the on-demand system information requested by the user equipment. For example, the on-demand System Information type may be selected from System Information (SI) 1, SI2, SI3, SI4, SI5 …, SI10, and the like. Specifically, the type of the on-demand system information in the message 3 may be in the form of bitmap.

Further, in the specific implementation of step S102, the base station may configure identification information in the MAC subheader corresponding to the response message. The identification information is to indicate whether the response message is for the on-demand system information request. In other words, when the base station configures a response message for an on-demand system information request, the identification information in the MAC subheader indicates that the response message is for the on-demand system information request; when the base station configures a response message for message 3 in the random access response, the identification information in the MAC subheader indicates that the response message is for message 3 in the random access response.

In this embodiment, when the base station receives the on-demand system information request in step S101, the base station configures identification information in step S102 to indicate that the response message is for the on-demand system information request, and further, in step S103, the base station configures a feedback message for the on-demand system information request in the response message. The type of the on-demand system information received by the base station of the UE can be informed through the type of the on-demand system information in the feedback message, so that the UE can judge whether the message 3 is successfully sent.

It should be noted that the feedback message may be configured in a bitmap (bitmap) form, and the length of the bitmap may be configured according to a specific application scenario. For example, when the length of bitmap is 10, and the types of the on-demand system information received by the base station are S12, SI4, SI5, and SI8, the feedback message may be 0101100100.

In the specific implementation of step S104, the response message is sent as message 4 at the specified resource location. The specified resource location may be specified by the base station and may be informed to the UE through the PDCCH. And the UE can blindly detect the PDCCH to obtain the specified resource position and obtain the response message at the specified resource position.

Specifically, the base station indicates a designated resource location of the response message through the PDCCH scrambled by the temporary C-RNTI and transmits the response message at the designated resource location.

In the embodiment of the invention, the base station configures the identification information in the MAC subheader corresponding to the response message, so that the UE can determine whether the response message comprises the feedback message or not through the identification information, thereby avoiding the possible collision problem between the UE requesting the on-demand system information and the UE performing normal access, reducing the retransmission of unnecessary message 3 and reducing the power consumption of the UE; and further, the response efficiency of the system information request on demand and the random access response efficiency are improved, and the user experience is improved.

Preferably, the response message is carried in a MAC control element, and a logical channel identifier used by the MAC control element is different from a logical channel identifier used by a contention resolution MAC control element. That is, the identification information may be a Logical Channel Identification (LCID) having a value different from that of the logical channel identification used by the contention resolution MAC control element.

Further, the logical channel identifier used by the MAC control element may also be different from any logical channel identifier; in this case, the MAC control element uses a new logical channel identification.

In this embodiment, the value of the logical channel identifier for transmitting the contention resolution MAC CE in the LTE system is 011100. In the NR system, if a new LCID is used to indicate an on-demand system information request response, the value of the new LCID is different from 011100, and may be, for example, 010010, 011000, 001100, and the like, which is not limited in this embodiment of the present invention. Further, the new LCID may also be different from the logical channel identification used for transmission of contention resolution MAC CE in NR system.

The embodiment of the invention can lead the UE to distinguish the on-demand system information request response and the competition solving MAC control unit in an implicit mode by configuring the identification information as the logical channel identification which is different from the logical channel identification used by the competition solving MAC control unit.

Preferably, the MAC control element and the contention resolution MAC control element use the same logical channel identifier, and the identifier information is represented by reserved bits of the MAC subheader. That is, the identification information may be a value of a reserved bit in the MAC subheader.

In this embodiment, the logical channel identifier may be represented by bits. The reserved bit in the existing MAC subheader format has no specific meaning and is fixedly valued as 0; then in the NR system, the reserved bits may be used, given a specific meaning and set different values as identification information.

In the embodiment of the invention, the base station sets the value of the reserved bit, so that the UE can distinguish the on-demand system information request response from the competition solution MAC control unit according to the value of the reserved bit.

Further, step S102 shown in fig. 1 may include the following steps: and configuring the value of any one bit of the reserved bits to a first preset value, wherein when the value of the reserved bits is a second preset value different from the first preset value, the response message is directed to contention resolution.

In this embodiment, the first preset value may be 1, and the second preset value is 0. That is, the base station may configure a value of an adjacent reserved bit of the LCID to 1 to indicate that the response message is for the on-demand system information request. In a specific application scenario, if the adjacent reserved bit of the LCID is set to 0, the MAC SDU corresponding to the message 4 is a contention resolution identifier of a normal random access process; if the adjacent reserved bit of LCID is set to 1, the MAC SDU corresponding to message 4 is the on-demand system information type contained in all on-demand system information requests.

Specifically, in a random access scenario, the response message is for contention resolution, and at this time, the base station may configure the value of the reserved bit to be a second preset value different from the first preset value.

It can be understood that the first preset value may also be 0, and then the second preset value is 1, which is not limited in this embodiment of the present invention.

It should be noted that the reserved bit of the LCID may be a bit next to the LCID, or may also be the first bit in the MAC subheader.

Preferably, the feedback message further comprises at least one historically received on-demand system information type.

In this embodiment, the base station may configure the feedback message for the currently received on-demand system information request and the currently and previously received on-demand system information request together, so as to save downlink signaling and improve transmission efficiency. For example, when the base station currently receives the on-demand system information request of the UE1 for S12 and SI4, and the base station already receives the on-demand system information requests for SI5 and SI8 sent by other UEs before receiving the on-demand system information request, the base station configures the feedback message to 0101100100 when receiving the on-demand system information request sent by the UE 1.

Preferably, the response message is a MAC PDU, and step S103 shown in fig. 1 may include the following steps: the MAC SDUs in the MAC PDUs carry the on-demand system information types of all the received on-demand system information requests.

In this embodiment, the response message is sent through the specified resource location indicated by the PDCCH scrambled by the temporary C-RNTI. The MAC PDU transmitted on the appointed resource position comprises an MAC sub-head and an MAC SDU, the MAC sub-head is configured with identification information, and the MAC SDU is feedback information of all received system information requests on demand by the base station in a bitmap form.

Preferably, step S104 shown in fig. 1 may include the following steps: and sending the response message as a message 4 at the specified resource position by using the message 4.

In this embodiment, the base station may send a response message including a feedback message to at least one user equipment using a message 4(Msg4) in order to conform to a message type in a random access procedure. The base station indicates the transmission resource position of the message 4 as the designated resource position through the PDCCH.

Fig. 2 is a flowchart of an on-demand system information request response receiving method according to an embodiment of the present invention.

The on-demand system information request response receiving method shown in fig. 2 may be used in a user equipment side, and the on-demand system information request response receiving method includes the following steps:

step S201: sending an on-demand system information request to a base station by using a message 3, wherein the on-demand system information request comprises an on-demand system information type, and an uplink resource of the message 3 is indicated in a random access response message acquired by using a lead code and a physical random access channel resource;

step S202: receiving a response message sent by the base station at a specified resource position;

step S203: receiving a feedback message according to identification information in an MAC subheader corresponding to the response message, wherein the identification information is used for indicating that the response message is for an on-demand system information request received by the base station, the feedback message is configured by the base station for the received on-demand system information request, and the feedback message comprises an on-demand system information type received by the base station;

step S204: and if the on-demand system information types in the feedback message comprise all on-demand system information types in the on-demand system information request, determining that the message 3 is transmitted successfully.

In this embodiment, at least one ue sends an on-demand system information request to the base station through step S201 to notify the base station of the type of the on-demand system information requested by the ue. Before step S201, the at least one ue further uses the same physical random access channel resource to send a preamble to the base station; and the base station sends the uplink resource of the message 3 to the at least one user equipment based on the preamble and the physical random access channel resource, so that the at least one user equipment can send the message 3.

Further, in step S202, the ue may receive a response message sent by the base station at a specified resource location. Specifically, the ue may obtain a designated resource location through a blind PDCCH, and then receive a response message at the designated resource location.

After receiving the response message, in step S203, the ue may determine whether to receive the feedback message according to the identification information in the MAC subheader corresponding to the response message. That is, if the identification information indicates that the response message is for an on-demand system information request received by the base station, a feedback message is received.

Further, in step S204, the on-demand system information type received by the base station in the feedback message is compared with the on-demand system information type in the on-demand system information request, and if the on-demand system information type in the feedback message includes all the on-demand system information types in the on-demand system information request, it is determined that the message 3 is successfully transmitted.

In a specific implementation, all the on-demand system information types in the on-demand system information request are included in the on-demand system information types received by the base station, that is, the on-demand system information types in the on-demand system information request are a subset of the on-demand system information types received by the base station.

In the embodiment of the invention, the UE can determine whether the response message comprises the feedback message or not by configuring the identification information in the MAC subheader corresponding to the response message, thereby avoiding the possible collision problem between the UE requesting the on-demand system information and the UE performing normal access, reducing the retransmission of unnecessary message 3 and reducing the power consumption of the UE; and further, the response efficiency of the system information request on demand and the random access response efficiency are improved, and the user experience is improved.

The receiving method shown in fig. 2 may further include the steps of: if the on-demand system information type in the feedback message includes a part of the on-demand system information type in the on-demand system information request, or does not include the on-demand system information type in the on-demand system information request.

In this embodiment, the feedback message configured by the base station may be directed to multiple on-demand system information requests, and the feedback message may include multiple on-demand system information types, so that the on-demand system information types received by the base station and the partial on-demand system information types included in the on-demand system information requests may occur. In this case, indicating that the transmission of message 3 failed, the user equipment needs to retransmit message 3. Specifically, the ue needs to retransmit the on-demand system information type in the on-demand system information request or the on-demand system information type not included in the response message, that is, retransmit the on-demand system information request including the on-demand system information type not included in the response message.

For example, when the type of the on-demand system information received by the base station is SI2, SI4, SI5, and SI8, and the type of the on-demand system information in the on-demand system information request of the UE1 is SI9, the transmission of the message 3 of the UE1 fails, the UE1 needs to retransmit the message 3, and the message 3 includes the system information SI 9. In an embodiment of the present invention, step S203 may include the following steps: and receiving the feedback message if the value of the reserved bit is configured to be a first preset value, wherein the response message is for contention resolution when the value of the reserved bit is a second preset value different from the first preset value.

In this embodiment, after receiving the response message, the UE first determines the value of the reserved bit, and if the value of the reserved bit is the first preset value, it indicates that the response message is for the on-demand system information request, and then the UE continues to receive the feedback message. And if the value of the reserved bit is a second preset value, the response message is directed to the random access request, and the user equipment determines that the transmission of the message 3 fails.

Further, if the UE sending the random access request determines that the value of the reserved bit is the second preset value, the UE determines that the message 3 is successfully transmitted.

It is understood that the first preset value may be 1, and the second preset value is 0. The first preset value may also be 0, and the second preset value is 1, which is not limited in this embodiment of the present invention.

In another embodiment of the present invention, the ue may determine the logical channel identifier in the MAC subheader. If the logical channel identifier in the MAC subheader is the logical channel identifier 010010 in LTE, it indicates that the response message is for the random access request, and the ue determines that the transmission of the message 3 fails.

If the logical channel identifier in the MAC subheader is different from the logical channel identifier 010010 in LTE, it indicates that the response message is for the on-demand system information request, and the user equipment determines that the transmission of the message 3 is successful.

Preferably, the ue may receive the response message sent by the base station with message 4 at a specified resource location.

In the specific implementation of this embodiment, the user equipment in the idle state or the inactive state sends the on-demand system information request through the message 3 that performs the random access process by using the common random access resource; the user equipment can transmit the MAC PDU through receiving the resource position indicated by the PDCCH scrambled by the temporary C-RNTI, and identify the feedback message aiming at the system information request on demand through the MAC subheader of the received MAC PDU; and determines whether the transmission of the message 3 is successful by recognizing the contents of the MAC SDU. The MAC subheader comprises a new LCID different from the LCID used by the MAC control unit for contention resolution, and is used for the UE to identify whether the content of the received response message is directed to the on-demand system information request or not, or to use the LCID of the existing MAC CE for identifying the contention resolution, and at the same time, to set different values for the reserved bits in the MAC subheader, to distinguish whether the received response message is directed to the on-demand system information request or the information used for contention resolution in the normal random access process.

For more detailed implementation of steps S201 to S204, reference may be made to the embodiment shown in fig. 1, which is not described herein again.

Fig. 3 is a schematic diagram of a specific application scenario according to an embodiment of the present invention.

In this embodiment, UE1, UE2, and UE4 are required to perform system information request on demand, and UE3 is required to perform normal access procedure to establish connection with the network. The UE1 needs to request on-demand system information SI2 and S14, the UE2 needs to request on-demand system information SI2, SI4 and SI8, and the UE4 needs to request on-demand system information SI 9. The UE1, the UE2 and the UE4 adopt an Msg3-based mechanism for transmission of the on-demand system information request message. The bitmap length of the message 3 transmission request system information on demand is 10 bits.

The UE1, the UE2, the UE3, and the UE4 select the same preamble and PRACH time-frequency resources in a common random access resource pool, and transmit the selected preamble on the selected PRACH resources.

The base station receives the lead code on the PRACH resource, and can not identify the UE, and the base station acquires a corresponding Random access Radio Network Temporary Identity (RA-RNTI) according to the PRACH resource and assembles a Random access response message. And the base station indicates the transmission resource of the random access response message by the calculated RA-RNTI scrambled PDCCH. And indicating the received lead code information in a subheader of a random access response message MAC PDU, wherein the random access response message MAC SDU carries the temporary C-RNTI and uplink resources used for sending the message 3.

As shown in fig. 3, UE1, UE2, UE3 and UE4 receive a random access response message transmitted at a resource location indicated by the PDCCH scrambled with the RA-RNTI and transmit message 3 at the resource location indicated in the message.

Wherein, the UE1 indicates the request information of the on-demand system information SI2 and S14 in the message 3, and the corresponding bitmap is set to 0101000000;

the UE2 indicates the request information of the on-demand system information SI2, SI4, and SI8 in message 3, and the corresponding bitmap is set to 0101000100;

the UE3 indicates an initial RRC connection establishment request in message 3, where the message carries a UE identity, which is 40bits, for example, S-TMSI;

the UE4 indicates the request information of the on-demand system information SI9 in message 3, with the corresponding bitmap set to 00000010.

UE1, UE2, UE3, and UE4 send respective Msg3 messages on the same resource, and the base station can typically only receive data sent from one UE. In this embodiment, the base station receives the message 3 sent from the UE2, and the base station needs to send corresponding feedback information to the UE 2. UE1, UE2, UE3, and UE4 need to identify the feedback information sent by the base station.

Wherein the base station may adopt LCID different from LCID value 011100 used for contention resolution identification as the identification information, for example, 010010. The reserved bit of the logical channel identifier may also be set to 1 to indicate that the response message is for the on-demand system information request.

The base station may indicate a resource location of the response message through the PDCCH scrambled by the temporary C-RNTI to transmit the response message. The MAC PDU transmitted on the resource comprises an MAC sub-head and an MAC SDU, and the MAC SDU is all system information request message indications on demand received by the base station and is fed back in a bitmap form. Since the base station has received the on-demand system information request transmitted by the UE5 before receiving the on-demand system information request of the UE2, the feedback message constituting the response should be set to 0101100100 when the base station receives the on-demand system information request transmitted by the UE 2.

UE1, UE2, UE3, and UE4 identify feedback information sent by the base station.

The UE1 and the UE2 monitor resource locations indicated by the PDCCH scrambled by the temporary C-RNTI to receive a response message MAC PDU, confirm that the MAC subheader LCID is 010010 or that the adjacent bit value of the LCID is 1, and confirm the feedback information 0101100100 in the MAC SDU. The feedback information includes SI2 and SI4 requested by UE1, and SI2, SI4, and SI8 requested by UE2, then UE1 and UE2 determine that message 3 transmission is successful.

The UE4 monitors the resource position indicated by the PDCCH scrambled by the temporary C-RNTI to receive a response message MAC PDU, confirms that the LCID of the MAC subheader is 010010 or the adjacent bit value of the LCID is 1, and confirms the feedback information 0101100100 in the MAC SDU. The feedback information does not include the SI9 requested by the UE4, then the UE4 determines that the message 3 transmission failed and the UE4 needs to retransmit message 3, which includes 00000010.

The UE3 monitors the resource location indicated by the PDCCH scrambled with the temporary C-RNTI to receive the response message MAC PDU, and confirms that the MAC subheader LCID is 010010 or the value of the adjacent bit of the LCID is 1, then the UE3 determines that the transmission of the message 3 fails, and the UE3 needs to retransmit the message 3 including the UE identity.

The embodiments of the present invention are merely exemplary descriptions, and do not limit the technical solutions of the present invention.

Fig. 4 is a schematic structural diagram of an on-demand system information request responding apparatus according to an embodiment of the present invention.

The on-demand system information request responding apparatus 40 shown in fig. 4 may be used on the base station side, and the on-demand system information request responding apparatus 40 may include an on-demand system information request receiving module 401, an identification information configuring module 402, a feedback message configuring module 403, and a response message sending module 404.

The on-demand system information request receiving module 401 is adapted to receive an on-demand system information request sent by at least one user equipment by using a message 3, where the on-demand system information request includes an on-demand system information type, and an uplink resource of the message 3 is acquired by the at least one user equipment by using a preamble and a physical random access channel resource; the identification information configuring module 402 is adapted to configure identification information in a MAC subheader corresponding to a response message, where the identification information is used to indicate that the response message is for the on-demand system information request; a feedback message configuration module 403 is adapted to configure a feedback message for the on-demand system information request in the response message, the feedback message comprising the received on-demand system information type; response message sending module 404 is adapted to send the response message as message 4 at the specified resource location.

Preferably, the response message is carried in a MAC control element, and a logical channel identifier used by the MAC control element is different from a logical channel identifier used by a contention resolution MAC control element. That is, the identification information may be a Logical Channel Identity (LCID) having a value different from that of the logical channel identity in the LTE.

In this embodiment, the value of the logical channel identifier for transmitting the contention resolution MAC CE in the LTE system is 011100. In the NR system, if a new LCID is used to indicate an on-demand system information request response, the value of the new LCID is different from 011100, and may be, for example, 010010, 011000, 001100, and the like, which is not limited in this embodiment of the present invention.

According to the embodiment of the invention, the identification information is configured to be the logical channel identification which is different from the logical channel identification in the LTE, so that the UE can distinguish the on-demand system information request response from the random access request response in an implicit mode.

Preferably, the identification information configuring module 402 may include a bit configuring unit 4021. The bit configuring unit 4021 is adapted to configure the value of the reserved bit to a first preset value, wherein the response message is for contention resolution when the value of the reserved bit is a second preset value different from the first preset value.

In this embodiment, the first preset value may be 1, and the second preset value is 0. That is, the base station configures a value of a reserved bit of the LCID to 1 to indicate that the response message is for the on-demand system information request. In a specific application scenario, if the reserved bit of the LCID is set to 0, the MAC SDU corresponding to the message 4 is a contention resolution identifier of a normal random access process; if the reserved bit of LCID is set to 1, the MAC SDU corresponding to message 4 is the type of the on-demand system information contained in all the on-demand system information requests.

Preferably, the response message is a MAC PDU, and the feedback message configuration module 403 carries the on-demand system information types of all the received on-demand system information requests in a MAC SDU in the MAC PDU.

Preferably, the response message sending module 404 sends the response message as message 4 at the specified resource location by using message 4.

For more details on the operation principle and the operation mode of the on-demand system information request responding apparatus 40, reference may be made to the relevant descriptions in fig. 1 to fig. 3, which are not described herein again.

The on-demand system information request response receiving apparatus 50 shown in fig. 5 may be used on the user equipment side, and the on-demand system information request response receiving apparatus 50 may include an on-demand system information request sending module 501, a response message receiving module 502, a feedback message receiving module 503, and a first transmission determining module 504.

The on-demand system information request sending module 501 is adapted to send an on-demand system information request to a base station by using a message 3, where the on-demand system information request includes an on-demand system information type, and an uplink resource of the message 3 is obtained by using a preamble and a physical random access channel resource; the response message receiving module 502 is adapted to receive a response message sent by the base station at a specified resource location; the feedback message receiving module 503 is adapted to receive a feedback message according to identification information in a MAC subheader corresponding to the response message, where the identification information is used to indicate that the response message is for an on-demand system information request received by the base station, the feedback message is configured by the base station for the received on-demand system information request, and the feedback message includes a type of the on-demand system information received by the base station; the first transmission determination module 504 is adapted to determine that the message 3 was successfully transmitted when the on-demand system information type in the feedback message comprises all on-demand system information types in the on-demand system information request.

Preferably, the on-demand system information request response receiving apparatus 50 shown in fig. 5 may further include a second transmission determining module 505, and the second transmission determining module 505 is adapted to determine that the message 3 fails to be transmitted when the type of the on-demand system information received by the base station is not consistent with or partially consistent with the type of the on-demand system information in the on-demand system information request.

In this embodiment, since the feedback message configured by the base station may be directed to multiple on-demand system information requests, and the feedback message may include multiple on-demand system information types, a situation that the on-demand system information type received by the base station is partially consistent with the on-demand system information type in the on-demand system information request may occur. In this case, indicating that the transmission of message 3 failed, the user equipment needs to retransmit message 3. Specifically, the user equipment needs to retransmit the on-demand system information type in the on-demand system information request or the on-demand system information type not included in the response message. For example, when the type of the on-demand system information received by the base station is SI2, SI4, SI5, and SI8, and the type of the on-demand system information in the on-demand system information request of the UE1 is SI9, the transmission of the message 3 of the UE1 fails, the UE1 needs to retransmit the message 3, and the message 3 includes the system information SI 9.

Preferably, the feedback message receiving module 503 may include a receiving unit 5031, and the receiving unit 5031 is adapted to receive the feedback message when the value of the reserved bit is configured to be a first preset value, wherein the response message is for contention resolution when the value of the reserved bit is a second preset value different from the first preset value.

Preferably, the feedback message receiving module 503 receives the feedback message carried in the MAC SDU through the identification information in the MAC subheader in the MAC PDU.

Preferably, the response message receiving module 502 receives the response message sent by the base station by using message 4 at the specified resource location.

For more details of the operation principle and operation mode of the on-demand system information request response receiving apparatus 50, reference may be made to the relevant descriptions in fig. 1 to fig. 3, which are not described herein again.

The embodiment of the invention also discloses a storage medium, on which computer instructions are stored, and when the computer instructions are operated, the steps of the on-demand system information request response method shown in fig. 1 or the steps of the on-demand system information request response receiving method shown in fig. 2 can be executed. The storage medium may include ROM, RAM, magnetic or optical disks, etc.

The embodiment of the invention also discloses a base station, which comprises a memory and a processor, wherein the memory is stored with computer instructions capable of running on the processor, and the processor executes the steps of the on-demand system information request response method shown in the figure 1 when running the computer instructions.

The embodiment of the invention also discloses user equipment which can comprise a memory and a processor, wherein the memory is stored with computer instructions capable of running on the processor. The processor, when executing the computer instructions, may perform the steps of the on-demand system information request response receiving method shown in fig. 2. The user equipment includes but is not limited to a mobile phone, a computer, a tablet computer and other terminal equipment.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. An on-demand system information request response method, comprising:

receiving an on-demand system information request sent by at least one user equipment by using a message 3, wherein the on-demand system information request comprises an on-demand system information type, and an uplink resource of the message 3 is indicated in a random access response message acquired by the at least one user equipment by using a lead code and a physical random access channel resource;

configuring identification information in a MAC subheader corresponding to a response message, wherein the identification information is used for indicating that the response message is directed to the on-demand system information request;

configuring a feedback message aiming at the on-demand system information request in the response message, wherein the feedback message comprises the received on-demand system information type, and the feedback message comprises the on-demand system information types in all the received on-demand system information requests;

and sending the response message as a message 4 at the specified resource position.

2. The on-demand system information request response method according to claim 1, wherein the response message is carried in a MAC control element, and a logical channel identifier used by the MAC control element is different from a logical channel identifier used by a contention resolution MAC control element.

3. The on-demand system information request response method as claimed in claim 1, wherein the MAC control element and the contention resolution MAC control element use the same logical channel identification, and the identification information is represented by reserved bits in a MAC subheader.

4. The on-demand system information request response method according to claim 3, wherein the configuring the identification information in the MAC subheader corresponding to the response message comprises:

and configuring the value of any one bit of the reserved bits to be a first preset value, wherein when the value of the reserved bits is a second preset value different from the first preset value, the response message is for contention resolution.

5. The on-demand system information request response method of claim 1, wherein the feedback message further comprises at least one historically received on-demand system information type.

6. The on-demand system information request response method according to claim 1, wherein the response message is a MAC PDU, and the configuring of the feedback message for the on-demand system information type in the response message comprises:

the MAC SDUs in the MAC PDUs carry the on-demand system information types of all the received on-demand system information requests.

7. The on-demand system information request response method of claim 1, wherein sending the response message as message 4 at a specified resource location comprises:

and sending the response message as a message 4 through the appointed resource position indicated by the PDCCH scrambled by the temporary C-RNTI.

8. An on-demand system information request response receiving method, comprising:

sending an on-demand system information request to a base station by using a message 3, wherein the on-demand system information request comprises an on-demand system information type, and an uplink resource of the message 3 is indicated in a random access response message acquired by using a lead code and a physical random access channel resource;

receiving a response message sent by the base station at a specified resource position;

receiving a feedback message according to identification information in an MAC subheader corresponding to the response message, wherein the identification information is used for indicating that the response message is directed to an on-demand system information request received by the base station, the feedback message is configured by the base station for the received on-demand system information request, the feedback message comprises an on-demand system information type received by the base station, and the feedback message comprises the on-demand system information types in all the received on-demand system information requests;

and if the on-demand system information types in the feedback message comprise all on-demand system information types in the on-demand system information request, determining that the message 3 is transmitted successfully.

9. The on-demand system information request response receiving method as claimed in claim 8, further comprising:

and if the on-demand system information type in the feedback message contains part of the on-demand system information type in the on-demand system information request or does not contain the on-demand system information type in the on-demand system information request, determining that the message 3 fails to be transmitted.

10. The on-demand system information request response receiving method according to claim 8, wherein the response message is carried in a MAC control unit, and a logical channel identifier used by the MAC control unit is different from a logical channel identifier used by a contention resolution MAC control unit.

11. The on-demand system information request response receiving method as claimed in claim 8, wherein the MAC control unit and the contention resolution MAC control unit use the same logical channel identification, and the identification information is represented by a reserved bit in a MAC subheader.

12. The on-demand system information request response receiving method according to claim 11, wherein the receiving a feedback message according to the identification information in the MAC subheader corresponding to the response message includes: and receiving the feedback message if the value of any one bit of the reserved bits is configured to be a first preset value, wherein the response message is for contention resolution when the value of the reserved bits is a second preset value different from the first preset value.

13. The on-demand system information request response receiving method of claim 8, wherein the feedback message further comprises at least one on-demand system information type historically received by the base station.

14. The on-demand system information request response receiving method according to claim 8, wherein the response message is a MAC PDU, and the receiving the feedback message according to the identification information in the MAC subheader corresponding to the response message comprises:

and receiving the feedback message carried in the MAC SDU through the identification information in the MAC subheader in the MAC PDU.

15. The on-demand system information request response receiving method as claimed in claim 8, wherein the receiving the response message transmitted from the base station at the specified resource location comprises:

receiving the response message sent by the base station as message 4 at a designated resource location indicated by the PDCCH scrambled with the temporary C-RNTI.

16. An on-demand system information request responding apparatus, comprising:

an on-demand system information request receiving module adapted to receive an on-demand system information request sent by at least one user equipment using a message 3, the on-demand system information request including an on-demand system information type, an uplink resource of the message 3 being indicated in a random access response message acquired by the at least one user equipment using a preamble and a physical random access channel resource;

an identification information configuration module, adapted to configure identification information in a MAC subheader corresponding to a response message, where the identification information is used to indicate that the response message is for the on-demand system information request;

a feedback message configuration module adapted to configure a feedback message for the on-demand system information request in the response message, where the feedback message includes the received on-demand system information type, and the feedback message includes the on-demand system information types in all the received on-demand system information requests;

and the response message sending module is suitable for sending the response message as the message 4 at the specified resource position.

17. The on-demand system information request responding apparatus according to claim 16, wherein the response message is carried in a MAC control element, and a logical channel identifier used by the MAC control element is different from a logical channel identifier used by a contention resolution MAC control element.

18. The on-demand system information request responding apparatus of claim 16, wherein the MAC control element and the contention resolution MAC control element use the same logical channel identification, and the identification information is represented by a reserved bit in a MAC subheader.

19. The on-demand system information request responding apparatus according to claim 18, wherein the identification information configuring module includes:

a bit configuration unit, adapted to configure a value of any one of the reserved bits as a first preset value, wherein the response message is for contention resolution when the value of the reserved bit is a second preset value different from the first preset value.

20. The on-demand system information request responding device according to claim 16, wherein the feedback message further includes at least one historically received on-demand system information type.

21. The on-demand system information request responding apparatus of claim 16, wherein the response message is a MAC PDU, and the feedback message configuration module carries the on-demand system information types of all the received on-demand system information requests in a MAC SDU in the MAC PDU.

22. The on-demand system information request responding apparatus of claim 16, wherein the response message sending module sends the response message as message 4 through a designated resource location of the PDCCH scrambled by the temporary C-RNTI.

23. An on-demand system information request response receiving apparatus, comprising:

an on-demand system information request sending module adapted to send an on-demand system information request to a base station using a message 3, the on-demand system information request including an on-demand system information type, an uplink resource of the message 3 being indicated in a random access response message acquired using a preamble and a physical random access channel resource;

a response message receiving module, adapted to receive a response message sent by the base station at a specified resource location;

a feedback message receiving module, adapted to receive a feedback message according to identification information in a MAC subheader corresponding to the response message, where the identification information is used to indicate that the response message is for an on-demand system information request received by the base station, the feedback message is configured by the base station for the received on-demand system information request, the feedback message includes an on-demand system information type received by the base station, and the feedback message includes on-demand system information types in all the received on-demand system information requests;

a first transmission determining module adapted to determine that the message 3 is successfully transmitted when the on-demand system information type in the feedback message includes all on-demand system information types in the on-demand system information request.

24. The on-demand system information request response receiving device as claimed in claim 23, further comprising:

a second transmission determining module adapted to determine that the transmission of the message 3 fails if the on-demand system information type in the feedback message includes part of the on-demand system information type in the on-demand system information request or does not include the on-demand system information type in the on-demand system information request.

25. The on-demand system information request response receiving apparatus as claimed in claim 23, wherein the response message is carried in a MAC control element, and a logical channel identifier used by the MAC control element is different from a logical channel identifier used by a contention resolution MAC control element.

26. The on-demand system information request response receiving apparatus as claimed in claim 23, wherein the MAC control element and the contention resolution MAC control element use the same logical channel identification, and the identification information is represented by reserved bits of a MAC subheader.

27. The on-demand system information request response receiving device of claim 26, wherein the feedback message receiving module comprises:

a receiving unit, adapted to receive the feedback message when a value of any one of the reserved bits is configured as a first preset value, wherein the response message is for contention resolution when the value of the reserved bit is a second preset value different from the first preset value.

28. The on-demand system information request response receiving device of claim 23, wherein the feedback message further comprises at least one historically received on-demand system information type by the base station.

29. The on-demand system information request response receiving device according to claim 23, wherein the response message is a MAC PDU, and the feedback message receiving module receives the feedback message carried in the MAC SDU through identification information in a MAC subheader in the MAC PDU.

30. The on-demand system information request response receiving device of claim 23, wherein the response message receiving module receives the response message sent by the base station as message 4 at a specified resource location indicated by the PDCCH scrambled with the temporary C-RNTI.

31. A computer readable storage medium having stored thereon computer instructions, wherein the computer instructions when executed perform the steps of the on-demand system information request response method of any one of claims 1 to 7 or the steps of the on-demand system information request response receiving method of any one of claims 8 to 15.

32. A base station comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor when executing the computer instructions performs the steps of the on-demand system information request response method of any one of claims 1 to 7.

33. A user equipment comprising a memory and a processor, said memory having stored thereon computer instructions executable on said processor, wherein said processor when executing said computer instructions performs the steps of the on-demand system information request response receiving method of any one of claims 8 to 15.