CN111988853B - System information transmission method in NR-U system - Google Patents
System information transmission method in NR-U system Download PDFInfo
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- CN111988853B CN111988853B CN201910438051.5A CN201910438051A CN111988853B CN 111988853 B CN111988853 B CN 111988853B CN 201910438051 A CN201910438051 A CN 201910438051A CN 111988853 B CN111988853 B CN 111988853B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0808—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using carrier sensing, e.g. as in CSMA
Abstract
The embodiment of the invention provides a system information transmission method in an NR-U system, which is applied to a base station and comprises the following steps: acquiring system information SI request information reported by a target terminal UE, wherein the SI request information carries an identification code of the target UE; if judging that the available unlicensed spectrum resources do not exist in the SI window associated with the target SI, when the subsequent listen-before-talk (LBT) is successful, the target SI is issued to the target UE by utilizing the RRC special message, wherein the target SI is the SI requested by the target UE and indicated by the SI request information. According to the system information transmission method in the NR-U system, the identification code of the UE is carried in the SI request information reported by the UE, so that the UE can still receive the SI in time by utilizing the RRC special message when the subsequent LBT is successful when the LBT is unsuccessful in the SI window associated with the SI, and the next SI transmission period is not required to be waited, thereby reducing the transmission delay and remarkably improving the system performance.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a system information transmission method in an NR-U system.
Background
In the field of mobile communication, spectrum resources are core resources for promoting industry development, and with rapid development of mobile communication, the problem of spectrum resource shortage is increasingly highlighted. To solve this problem, on one hand, new technologies such as Massive MIMO (Massive MIMO) and ultra-dense networking (UDN) are adopted to increase the network capacity, and on the other hand, available spectrum resources are continuously developed.
Unlicensed use unlicensed frequency bands existing in the current 5GHz frequency band are still resources worth excavating. In order to use the unlicensed band, the 3GPP proposes an auxiliary licensed access (LAA) technology, that is, a carrier aggregation manner is adopted to jointly use the unlicensed band and the licensed band, so as to achieve a higher data rate, so that a user experiences better application experience. However, since WiFi network deployment is also in unlicensed bands, directly applying new air interface (NR) technology to unlicensed bands will inevitably cause interference to Wi-Fi. Therefore, before data transmission, the base station needs to first perform Listen Before Talk (LBT) operation to select available spectrum resources, and finally achieve harmonious coexistence with WiFi.
In LTE, system Information (SI) is cell-level information, i.e., all terminals (UEs) accessing the cell are in effect. It contains 3 types of RRC messages for transmitting SI, MIB messages, SIB1 messages, one or more SI messages, respectively. However, in NR, to reduce SI broadcast overhead, there are two different types of SIBs: one type is a type that is periodically transmitted as SIB in LTE, and the other type is a type that is transmitted only when there is a request from the UE, i.e., SI request function is introduced.
For SI requests, there are mainly two request methods in NR, that is, SI requests are made through msg1 and msg3, respectively. For msg1 request SI, this is mainly achieved by RRC configured dedicated PRACH occision, while for msg3 request SI is mainly requested by rrcssysteminforequest message. In addition, SI requests can also be initiated based on two-step random access msgA, with related content still under discussion. However, in a new air-interface unlicensed spectrum (NR-U) system, there may be an unsuccessful SI request due to uncertainty of a channel state, at this time, the UE needs to wait for the next period to receive the requested SI in the SI window, which introduces a large latency, seriously affects system performance, so how to successfully and efficiently acquire the SI in the NR-U system is an important problem to be solved at present.
Disclosure of Invention
An object of an embodiment of the present invention is to provide a system information transmission method in an NR-U system that overcomes or at least partially solves the above-mentioned problems.
In order to solve the above technical problems, in one aspect, an embodiment of the present invention provides a system information transmission method in an NR-U system, which is applied to a base station, and includes:
acquiring system information SI request information reported by a target terminal UE, wherein the SI request information carries an identification code of the target UE;
if judging that the available unlicensed spectrum resources do not exist in the SI window associated with the target SI, when the subsequent listen-before-talk (LBT) is successful, issuing the target SI to the target UE by utilizing an RRC special message, wherein the target SI is the SI requested by the target UE and indicated by the SI request information.
Further, after the system information SI request information reported by the target terminal UE is obtained, the method further includes:
and if judging that the available unlicensed spectrum resources exist in the SI window, broadcasting the target SI.
Further, the issuing the target SI to the target UE by using an RRC dedicated message specifically includes:
establishing a new RRC proprietary message for carrying the target SI;
and issuing the new RRC proprietary message to the target UE.
Further, the issuing the target SI to the target UE by using an RRC dedicated message specifically includes:
adding the relevant information element of the target SI into the existing RRC proprietary message;
and issuing the existing RRC proprietary message to the target UE.
Further, the target SI is carried in msg 4.
Further, the SI request information is carried in msg1, msg3, or msgA.
Further, the identification code is a cell radio network temporary identifier C-RNTI.
Further, the existing RRC dedicated message is an RRC reconfiguration message.
On the other hand, an embodiment of the present invention provides a system information transmission method in an NR-U system, which is applied to a terminal, and includes:
reporting SI request information to a base station, wherein the SI request information carries an identification code of UE (user equipment) so as to trigger the base station to judge whether available unlicensed spectrum resources exist in an SI window associated with a target SI, and the target SI is the SI requested by the UE and indicated by the SI request information;
and when no unlicensed spectrum resource exists in the SI window, receiving the target SI issued by the base station by utilizing an RRC proprietary message.
In still another aspect, an embodiment of the present invention provides a base station, including:
the acquisition module is used for acquiring system information SI request information reported by a target terminal UE, wherein the SI request information carries an identification code of the target UE;
and the issuing module is used for issuing the target SI to the target UE by utilizing an RRC special message when judging that the available unlicensed spectrum resources do not exist in the SI window associated with the target SI and the subsequent listen-before-talk LBT is successful, wherein the target SI is the SI requested by the target UE and indicated by the SI request information.
In yet another aspect, an embodiment of the present invention provides a terminal, including:
the reporting module is used for reporting SI request information to a base station, wherein the SI request information carries an identification code of UE (user equipment) so as to trigger the base station to judge whether available unlicensed spectrum resources exist in an SI window associated with a target SI, and the target SI is the SI which is indicated by the SI request information and requested by the UE;
and the receiving module is used for receiving the target SI issued by the base station by utilizing an RRC proprietary message when the available unlicensed spectrum resources do not exist in the SI window.
In still another aspect, an embodiment of the present invention provides an electronic device, including: the computer program comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor realizes the steps of the method when executing the computer program.
In yet another aspect, embodiments of the present invention provide a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the above-described method.
According to the system information transmission method in the NR-U system, the identification code of the UE is carried in the SI request information reported by the UE, so that the UE can still receive the SI in time by utilizing the RRC special message when the subsequent LBT is successful when the LBT is unsuccessful in the SI window associated with the SI, and the next SI transmission period is not required to be waited, thereby reducing the transmission delay and remarkably improving the system performance.
Drawings
Fig. 1 is a schematic diagram of a system information transmission method in an NR-U system according to an embodiment of the present invention;
fig. 2 is a signaling interaction schematic diagram of a system information transmission process according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a base station according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Fig. 1 is a schematic diagram of a system information transmission method in an NR-U system according to an embodiment of the present invention, where as shown in fig. 1, an embodiment of the present invention provides a system information transmission method in an NR-U system, and an execution body of the system information transmission method is a base station, where the method includes:
step S101, acquiring system information SI request information reported by a target terminal UE, wherein the SI request information carries an identification code of the target UE;
step S102, if it is determined that there are no available unlicensed spectrum resources in the SI window associated with the target SI, the target SI is issued to the target UE by using an RRC dedicated message when the subsequent listen-before-talk LBT is successful, where the target SI is the SI requested by the target UE and indicated by the SI request information.
Specifically, the base station related to the embodiment of the invention comprises an acquisition module and a transmitting module, and the UE related to the embodiment of the invention comprises a reporting module and a receiving module.
Fig. 2 is a signaling interaction diagram of a system information transmission process provided in an embodiment of the present invention, as shown in fig. 2, when a UE needs to acquire a target SI, SI request information is reported to a base station by a reporting module, where the SI request information may be an RRCSystemInfoRequest message, and the SI request information carries an ID of an identification code of the UE.
The base station acquires the SI request information reported by the UE through an acquisition module.
After acquiring the SI request information reported by the UE, if no available unlicensed spectrum resource exists in the SI window associated with the target SI currently, the base station identifies the UE according to the ID of the UE, and then, when the subsequent LBT is successful, the target SI is issued to the UE by using the RRC proprietary message through an issuing module.
And the UE receives the RRC proprietary message issued by the base station through the receiving module and analyzes the target SI from the RRC proprietary message.
For example, UE1 needs to acquire the target SI, and UE1 reports rrcsteminfofequest information to base station a through a reporting module, where the rrcsteminfofequest information carries ID12345 of UE1.
The base station A acquires the RRCStemInfoRequest information reported by the UE1 through an acquisition module.
After the base station a obtains the rrcsteminforequest information reported by the UE1, if there is no available unlicensed spectrum resource currently in the SI window associated with the target SI, the base station a identifies the UE1 according to the ID12345 of the UE1, and then, when the subsequent LBT is successful, carries the target SI in the RRC dedicated message through the issuing module and issues the RRC dedicated message to the UE1.
The UE1 receives the RRC proprietary message issued by the base station A through the receiving module and analyzes the target SI from the RRC proprietary message.
According to the system information transmission method in the NR-U system, the identification code of the UE is carried in the SI request information reported by the UE, so that the UE can still receive the SI in time by utilizing the RRC special message when the subsequent LBT is successful when the LBT is unsuccessful in the SI window associated with the SI, and the next SI transmission period is not required to be waited, thereby reducing the transmission delay and remarkably improving the system performance.
On the basis of the foregoing embodiment, further, after obtaining the system information SI request information reported by the target terminal UE, the method further includes:
and if judging that the available unlicensed spectrum resources exist in the SI window, broadcasting the target SI.
Specifically, when the UE needs to acquire the target SI, the reporting module reports SI request information to the base station, where the SI request information may be an RRCSystemInfoRequest message, and the SI request information carries an identifier ID of the UE.
The base station acquires the SI request information reported by the UE through an acquisition module.
After acquiring the SI request information reported by the UE, the base station performs LBT operation to judge whether available unlicensed spectrum resources exist in an SI window associated with the target SI. If there is no unlicensed spectrum resource available in the SI window associated with the target SI currently, the base station identifies the UE according to its ID, and then, when the subsequent LBT is successful, issues the target SI to the UE by means of an RRC-dedicated message through an issue module.
And the UE receives the RRC proprietary message issued by the base station through the receiving module and analyzes the target SI from the RRC proprietary message.
If there are currently unlicensed spectrum resources available within the SI window associated with the target SI, the base station broadcasts the target SI through the delivery module.
And the UE receives the target SI broadcasted by the base station through a receiving module.
According to the system information transmission method in the NR-U system, the identification code of the UE is carried in the SI request information reported by the UE, so that the UE can still receive the SI in time by utilizing the RRC special message when the subsequent LBT is successful when the LBT is unsuccessful in the SI window associated with the SI, and the next SI transmission period is not required to be waited, thereby reducing the transmission delay and remarkably improving the system performance.
On the basis of the above embodiments, further, the delivering the target SI to the target UE by using an RRC dedicated message specifically includes:
establishing a new RRC proprietary message for carrying the target SI;
and issuing the new RRC proprietary message to the target UE.
Specifically, when the UE needs to acquire the target SI, the reporting module reports SI request information to the base station, where the SI request information may be an RRCSystemInfoRequest message, and the SI request information carries an identifier ID of the UE.
The base station acquires the SI request information reported by the UE through an acquisition module.
After acquiring the SI request information reported by the UE, the base station performs LBT operation to judge whether available unlicensed spectrum resources exist in an SI window associated with the target SI. If there is no available unlicensed spectrum resource in the SI window associated with the target SI currently, the base station identifies the UE according to the ID of the UE, then, when the subsequent LBT is successful, issues the target SI to the UE by using the RRC proprietary message through the issuing module, and the base station may establish a new RRC proprietary message rrcsteminformation, and carry the SI in the rrcsteminformation message, and then issue the rrcsteminformation to the UE.
And the UE receives RRCStemInformationmessage issued by the base station through a receiving module and analyzes the target SI from the RRCStemInformationmessage.
If there are currently unlicensed spectrum resources available within the SI window associated with the target SI, the base station broadcasts the target SI through the delivery module.
And the UE receives the target SI broadcasted by the base station through a receiving module.
According to the system information transmission method in the NR-U system, the identification code of the UE is carried in the SI request information reported by the UE, so that the UE can still receive the SI in time by utilizing the RRC special message when the subsequent LBT is successful when the LBT is unsuccessful in the SI window associated with the SI, and the next SI transmission period is not required to be waited, thereby reducing the transmission delay and remarkably improving the system performance.
On the basis of the above embodiments, further, the delivering the target SI to the target UE by using an RRC dedicated message specifically includes:
adding the relevant information element of the target SI into the existing RRC proprietary message;
and issuing the existing RRC proprietary message to the target UE.
Specifically, when the UE needs to acquire the target SI, the reporting module reports SI request information to the base station, where the SI request information may be an RRCSystemInfoRequest message, and the SI request information carries an identifier ID of the UE.
The base station acquires the SI request information reported by the UE through an acquisition module.
After acquiring the SI request information reported by the UE, the base station performs LBT operation to judge whether available unlicensed spectrum resources exist in an SI window associated with the target SI. If there is no available unlicensed spectrum resource in the SI window associated with the target SI currently, the base station identifies the UE according to the ID of the UE, then, when the subsequent LBT is successful, issues the target SI to the UE by using the RRC proprietary message through the issuing module, the base station may multiplex and expand the existing RRC proprietary message, add the relevant cell RRCSysteminformation-IEs of the target SI therein, and then issue the existing RRC proprietary message to the UE.
And the UE receives the existing RRC special message issued by the base station through a receiving module and analyzes the target SI from the message.
If there are currently unlicensed spectrum resources available within the SI window associated with the target SI, the base station broadcasts the target SI through the delivery module.
The UE receives the target SI broadcasted by the base station through a receiving module.
According to the system information transmission method in the NR-U system, the identification code of the UE is carried in the SI request information reported by the UE, so that the UE can still receive the SI in time by utilizing the RRC special message when the subsequent LBT is successful when the LBT is unsuccessful in the SI window associated with the SI, and the next SI transmission period is not required to be waited, thereby reducing the transmission delay and remarkably improving the system performance.
Further, on the basis of the above embodiments, the target SI is carried in msg 4.
Specifically, when the UE needs to acquire the target SI, the reporting module reports SI request information to the base station, where the SI request information may be an RRCSystemInfoRequest message, and the SI request information carries an identifier ID of the UE.
The base station acquires the SI request information reported by the UE through an acquisition module.
After acquiring the SI request information reported by the UE, the base station performs LBT operation to judge whether available unlicensed spectrum resources exist in an SI window associated with the target SI. If there is no unlicensed spectrum resource available in the SI window associated with the target SI currently, the base station identifies the UE according to its ID, and then, when the subsequent LBT is successful, issues the target SI to the UE by means of an RRC-dedicated message through an issue module. Wherein, the RRC dedicated message carrying the target SI is carried in msg 4.
And the UE receives the RRC special message issued by the base station through a receiving module and analyzes the target SI from the RRC special message.
If there are currently unlicensed spectrum resources available within the SI window associated with the target SI, the base station broadcasts the target SI through the delivery module.
The UE receives the target SI broadcasted by the base station through a receiving module.
According to the system information transmission method in the NR-U system, the identification code of the UE is carried in the SI request information reported by the UE, so that the UE can still receive the SI in time by utilizing the RRC special message when the subsequent LBT is successful when the LBT is unsuccessful in the SI window associated with the SI, and the next SI transmission period is not required to be waited, thereby reducing the transmission delay and remarkably improving the system performance.
Further, on the basis of the above embodiments, the SI request information is carried in msg1, msg3, or msgA.
Specifically, when the UE needs to acquire the target SI, the reporting module reports SI request information to the base station, where the SI request information may be an RRCSystemInfoRequest message, and the SI request information carries an identifier ID of the UE. The SI request information may be carried in msg1, msg3, or msgA.
The base station acquires the SI request information reported by the UE through an acquisition module.
After acquiring the SI request information reported by the UE, the base station performs LBT operation to judge whether available unlicensed spectrum resources exist in an SI window associated with the target SI. If there is no unlicensed spectrum resource available in the SI window associated with the target SI currently, the base station identifies the UE according to its ID, and then, when the subsequent LBT is successful, issues the target SI to the UE by means of an RRC-dedicated message through an issue module.
And the UE receives the RRC special message issued by the base station through a receiving module and analyzes the target SI from the RRC special message.
If there are currently unlicensed spectrum resources available within the SI window associated with the target SI, the base station broadcasts the target SI through the delivery module.
And the UE receives the target SI broadcasted by the base station through a receiving module.
According to the system information transmission method in the NR-U system, the identification code of the UE is carried in the SI request information reported by the UE, so that the UE can still receive the SI in time by utilizing the RRC special message when the subsequent LBT is successful when the LBT is unsuccessful in the SI window associated with the SI, and the next SI transmission period is not required to be waited, thereby reducing the transmission delay and remarkably improving the system performance.
Further, on the basis of the above embodiments, the identification code is a cell radio network temporary identifier C-RNTI.
Specifically, when the UE needs to acquire the target SI, the reporting module reports SI request information to the base station, where the SI request information may be an RRCSystemInfoRequest message, and the SI request information carries an identifier ID of the UE. In the embodiment of the invention, the cell radio network temporary identifier C-RNTI is used as the ID of the UE.
The base station acquires the SI request information reported by the UE through an acquisition module.
After acquiring the SI request information reported by the UE, the base station performs LBT operation to judge whether available unauthorized exists in the SI window associated with the target SI. If there is no available unauthorized in the SI window associated with the target SI currently, the base station identifies the UE according to the ID of the UE, and then, when the subsequent LBT is successful, the target SI is issued to the UE by the issuing module by using the RRC proprietary message.
And the UE receives the RRC special message issued by the base station through a receiving module and analyzes the target SI from the RRC special message.
If there are currently unlicensed spectrum resources available within the SI window associated with the target SI, the base station broadcasts the target SI through the delivery module.
And the UE receives the target SI broadcasted by the base station through a receiving module.
According to the system information transmission method in the NR-U system, the identification code of the UE is carried in the SI request information reported by the UE, so that the UE can still receive the SI in time by utilizing the RRC special message when the subsequent LBT is successful when the LBT is unsuccessful in the SI window associated with the SI, and the next SI transmission period is not required to be waited, thereby reducing the transmission delay and remarkably improving the system performance.
Further, on the basis of the above embodiments, the existing RRC dedicated message is an RRC reconfiguration message.
Specifically, when the UE needs to acquire the target SI, the reporting module reports SI request information to the base station, where the SI request information may be an RRCSystemInfoRequest message, and the SI request information carries an identifier ID of the UE.
The base station acquires the SI request information reported by the UE through an acquisition module.
After acquiring the SI request information reported by the UE, the base station performs LBT operation to judge whether available unlicensed spectrum resources exist in an SI window associated with the target SI. If there is no available unlicensed spectrum resource in the SI window associated with the target SI, the base station identifies the UE according to the ID of the UE, then, when the subsequent LBT is successful, issues the target SI to the UE by using the RRC proprietary message through the issuing module, the base station may multiplex the existing RRC proprietary message rrcrectonfiguration and expand the RRC proprietary message, and add the relevant cell RRCSysteminformation-IEs of the target SI therein, and then issue the rrcrectonfiguration message to the UE.
And the UE receives the RRCRECONfigure message issued by the base station through a receiving module and analyzes the target SI from the RRCRECONfigure message.
If there are currently unlicensed spectrum resources available within the SI window associated with the target SI, the base station broadcasts the target SI through the delivery module.
The UE receives the target SI broadcasted by the base station through a receiving module.
According to the system information transmission method in the NR-U system, the identification code of the UE is carried in the SI request information reported by the UE, so that the UE can still receive the SI in time by utilizing the RRC special message when the subsequent LBT is successful when the LBT is unsuccessful in the SI window associated with the SI, and the next SI transmission period is not required to be waited, thereby reducing the transmission delay and remarkably improving the system performance.
The embodiment of the invention provides a system information transmission method in an NR-U system, wherein an execution main body is a terminal, and the method comprises the following steps:
reporting SI request information to a base station, wherein the SI request information carries an identification code of UE (user equipment) so as to trigger the base station to judge whether available unlicensed spectrum resources exist in an SI window associated with a target SI, and the target SI is the SI requested by the UE and indicated by the SI request information;
and when no unlicensed spectrum resource exists in the SI window, receiving the target SI issued by the base station by utilizing an RRC proprietary message.
Specifically, the base station related to the embodiment of the invention comprises an acquisition module and a transmitting module, and the UE related to the embodiment of the invention comprises a reporting module and a receiving module.
Fig. 2 is a signaling interaction diagram of a system information transmission process provided in an embodiment of the present invention, as shown in fig. 2, when a UE needs to acquire a target SI, SI request information is reported to a base station by a reporting module, where the SI request information may be an RRCSystemInfoRequest message, and the SI request information carries an ID of an identification code of the UE.
The base station acquires the SI request information reported by the UE through an acquisition module.
After acquiring the SI request information reported by the UE, if no available unlicensed spectrum resource exists in the SI window associated with the target SI currently, the base station identifies the UE according to the ID of the UE, and then, when the subsequent LBT is successful, the target SI is issued to the UE by using the RRC proprietary message through an issuing module.
And the UE receives the RRC proprietary message issued by the base station through the receiving module and analyzes the target SI from the RRC proprietary message.
For example, UE1 needs to acquire the target SI, and UE1 reports rrcsteminfofequest information to base station a through a reporting module, where the rrcsteminfofequest information carries ID12345 of UE1.
The base station A acquires the RRCStemInfoRequest information reported by the UE1 through an acquisition module.
After the base station a obtains the rrcsteminforequest information reported by the UE1, if there is no available unlicensed spectrum resource currently in the SI window associated with the target SI, the base station a identifies the UE1 according to the ID12345 of the UE1, and then, when the subsequent LBT is successful, carries the target SI in the RRC dedicated message through the issuing module and issues the RRC dedicated message to the UE1.
The UE1 receives the RRC proprietary message issued by the base station A through the receiving module and analyzes the target SI from the RRC proprietary message.
According to the system information transmission method in the NR-U system, the identification code of the UE is carried in the SI request information reported by the UE, so that the UE can still receive the SI in time by utilizing the RRC special message when the subsequent LBT is successful when the LBT is unsuccessful in the SI window associated with the SI, and the next SI transmission period is not required to be waited, thereby reducing the transmission delay and remarkably improving the system performance.
Fig. 3 is a schematic diagram of a base station provided by an embodiment of the present invention, and as shown in fig. 3, an embodiment of the present invention provides a base station, configured to execute a method described in any embodiment where the execution body is a base station, and specifically includes an obtaining module 301 and a sending module 302, where:
the acquiring module 301 is configured to acquire system information SI request information reported by a target terminal UE, where the SI request information carries an identification code of the target UE; the issuing module 302 is configured to issue, if it is determined that there is no unlicensed spectrum resource available in an SI window associated with a target SI, the target SI to the target UE by using an RRC dedicated message when a subsequent listen-before-talk LBT is successful, where the target SI is indicated by the SI request information and is requested by the target UE.
Specifically, the UE related to the embodiment of the invention comprises a reporting module and a receiving module.
Fig. 2 is a signaling interaction diagram of a system information transmission process provided in an embodiment of the present invention, as shown in fig. 2, when a UE needs to acquire a target SI, SI request information is reported to a base station by a reporting module, where the SI request information may be an RRCSystemInfoRequest message, and the SI request information carries an ID of an identification code of the UE.
The base station acquires the SI request reported by the UE through the acquisition module 301.
After acquiring the SI request information reported by the UE, if there is no available unlicensed spectrum resource currently in the SI window associated with the target SI, the base station identifies the UE according to the ID of the UE, and then, through the issuing module 302, issues the target SI to the UE by using the RRC proprietary message.
And the UE receives the RRC proprietary message issued by the base station through the receiving module and analyzes the target SI from the RRC proprietary message.
For example, UE1 needs to acquire the target SI, and UE1 reports rrcsteminfofequest information to base station a through a reporting module, where the rrcsteminfofequest information carries ID12345 of UE1.
The base station A acquires the RRCStemInfoRequest information reported by the UE1 through an acquisition module.
After the base station a obtains the rrcsteminforequest information reported by the UE1, if there is no available unlicensed spectrum resource currently in the SI window associated with the target SI, the base station a identifies the UE1 according to the ID12345 of the UE1, and then, when the subsequent LBT is successful, carries the target SI in the RRC dedicated message through the issuing module and issues the RRC dedicated message to the UE1.
The UE1 receives the RRC proprietary message issued by the base station A through a receiving module, and analyzes the target SI from the RRC proprietary message.
An embodiment of the present invention provides a base station, configured to execute the method described in any embodiment where the execution body is a base station, and specific steps of executing the method described in the foregoing embodiment by using the base station provided in this embodiment are the same as those of the foregoing corresponding embodiment, and are not described herein again.
According to the base station provided by the embodiment of the invention, the identification code of the UE is carried in the SI request information reported by the UE, so that the UE can still utilize the RRC special message to timely receive the SI when the subsequent LBT is successful when the LBT is unsuccessful in the SI window associated with the SI, and the next SI sending period is not required to be waited, thereby reducing the transmission delay and remarkably improving the system performance.
The embodiment of the invention provides a terminal for executing the method described in any embodiment in which the execution body is a terminal, specifically comprising a reporting module and a receiving module, wherein:
the reporting module is used for reporting SI request information to a base station, wherein the SI request information carries an identification code of UE (user equipment) so as to trigger the base station to judge whether available unlicensed spectrum resources exist in an SI window associated with a target SI, and the target SI is the SI which is indicated by the SI request information and requested by the UE; and the receiving module is used for receiving the target SI issued by the base station by utilizing an RRC proprietary message when the available unlicensed spectrum resources do not exist in the SI window.
Specifically, the base station related to the embodiment of the invention comprises an acquisition module and a transmitting module.
Fig. 2 is a signaling interaction diagram of a system information transmission process provided in an embodiment of the present invention, as shown in fig. 2, when a UE needs to acquire a target SI, SI request information is reported to a base station by a reporting module, where the SI request information may be an RRCSystemInfoRequest message, and the SI request information carries an ID of an identification code of the UE.
The base station acquires the SI request information reported by the UE through an acquisition module.
After acquiring the SI request information reported by the UE, if no available unlicensed spectrum resource exists in the SI window associated with the target SI currently, the base station identifies the UE according to the ID of the UE, and then, when the subsequent LBT is successful, the target SI is issued to the UE by using the RRC proprietary message through an issuing module.
And the UE receives the RRC special message issued by the base station through a receiving module and analyzes the target SI from the RRC special message.
For example, UE1 needs to acquire the target SI, and UE1 reports rrcsteminfofequest information to base station a through a reporting module, where the rrcsteminfofequest information carries ID12345 of UE1.
The base station A acquires the RRCStemInfoRequest information reported by the UE1 through an acquisition module.
After the base station a obtains the rrcsteminforequest information reported by the UE1, if there is no available unlicensed spectrum resource currently in the SI window associated with the target SI, the base station a identifies the UE1 according to the ID12345 of the UE1, and then, when the subsequent LBT is successful, carries the target SI in the RRC dedicated message through the issuing module and issues the RRC dedicated message to the UE1.
The UE1 receives the RRC proprietary message issued by the base station A through the receiving module and analyzes the target SI from the RRC proprietary message.
An embodiment of the present invention provides a terminal, configured to execute a method described in any embodiment where the execution body is a terminal, and specific steps of executing, by the terminal provided in this embodiment, the method described in the foregoing embodiment are the same as those of the foregoing corresponding embodiment, and are not described herein again.
According to the terminal provided by the embodiment of the invention, the identification code of the UE is carried in the SI request information reported by the UE, so that the UE can still utilize the RRC special message to timely receive the SI when the subsequent LBT is successful when the LBT is unsuccessful in the SI window associated with the SI, and the next SI sending period is not required to be waited, thereby reducing the transmission delay and remarkably improving the system performance.
Fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present invention, as shown in fig. 4, where the device includes: a processor 401, a memory 402, a bus 403, and a computer program stored on the memory and executable on the processor.
Wherein the processor 401 and the memory 402 complete communication with each other through the bus 403;
the processor 401 is configured to invoke and execute a computer program in the memory 402 to perform the steps of the method embodiments described above, including, for example:
acquiring system information SI request information reported by a target terminal UE, wherein the SI request information carries an identification code of the target UE; if judging that the available unlicensed spectrum resources do not exist in the SI window associated with the target SI, when the subsequent listen-before-talk (LBT) is successful, issuing the target SI to the target UE by utilizing an RRC special message, wherein the target SI is the SI requested by the target UE and indicated by the SI request information.
Alternatively, it includes:
reporting SI request information to a base station, wherein the SI request information carries an identification code of UE (user equipment) so as to trigger the base station to judge whether available unlicensed spectrum resources exist in an SI window associated with a target SI, and the target SI is the SI requested by the UE and indicated by the SI request information; and when no unlicensed spectrum resource exists in the SI window, receiving the target SI issued by the base station by utilizing an RRC proprietary message.
Further, the logic instructions in the memory described above may be implemented in the form of software functional units and stored in a computer-readable storage medium when sold or used as a stand-alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Embodiments of the present invention provide a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform the steps of the method embodiments described above, for example comprising:
acquiring system information SI request information reported by a target terminal UE, wherein the SI request information carries an identification code of the target UE; if judging that the available unlicensed spectrum resources do not exist in the SI window associated with the target SI, when the subsequent listen-before-talk (LBT) is successful, issuing the target SI to the target UE by utilizing an RRC special message, wherein the target SI is the SI requested by the target UE and indicated by the SI request information.
Alternatively, it includes:
reporting SI request information to a base station, wherein the SI request information carries an identification code of UE (user equipment) so as to trigger the base station to judge whether available unlicensed spectrum resources exist in an SI window associated with a target SI, and the target SI is the SI requested by the UE and indicated by the SI request information; and when no unlicensed spectrum resource exists in the SI window, receiving the target SI issued by the base station by utilizing an RRC proprietary message.
Embodiments of the present invention provide a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method embodiments described above, for example, including:
acquiring system information SI request information reported by a target terminal UE, wherein the SI request information carries an identification code of the target UE; if judging that the available unlicensed spectrum resources do not exist in the SI window associated with the target SI, when the subsequent listen-before-talk (LBT) is successful, issuing the target SI to the target UE by utilizing an RRC special message, wherein the target SI is the SI requested by the target UE and indicated by the SI request information.
Alternatively, it includes:
reporting SI request information to a base station, wherein the SI request information carries an identification code of UE (user equipment) so as to trigger the base station to judge whether available unlicensed spectrum resources exist in an SI window associated with a target SI, and the target SI is the SI requested by the UE and indicated by the SI request information; and when no unlicensed spectrum resource exists in the SI window, receiving the target SI issued by the base station by utilizing an RRC proprietary message.
The embodiments of the apparatus and devices described above are merely illustrative, wherein the elements described as separate elements may or may not be physically separate, and elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (12)
1. A system information transmission method in an NR-U system, applied to a base station, comprising:
acquiring system information SI request information reported by a target terminal UE, wherein the SI request information carries an identification code of the target UE;
if judging that no available unlicensed spectrum resource exists in an SI window associated with a target SI, when the subsequent listen-before-talk (LBT) is successful, issuing the target SI to the target UE by utilizing an RRC special message, wherein the target SI is the SI requested by the target UE and indicated by the SI request information;
and if judging that the available unlicensed spectrum resources exist in the SI window, broadcasting the target SI.
2. The system information transmission method in the NR-U system according to claim 1, wherein the issuing the target SI to the target UE by using an RRC dedicated message specifically includes:
establishing a new RRC proprietary message for carrying the target SI;
and issuing the new RRC proprietary message to the target UE.
3. The system information transmission method in the NR-U system according to claim 1, wherein the issuing the target SI to the target UE by using an RRC dedicated message specifically includes:
adding the relevant information element of the target SI into the existing RRC proprietary message;
and issuing the existing RRC proprietary message to the target UE.
4. The system information transmission method in an NR-U system according to claim 1, wherein the target SI is carried in msg 4.
5. The system information transmission method in an NR-U system according to claim 1, wherein the SI request information is carried in msg1, msg3, or msgA.
6. The system information transmission method in an NR-U system according to claim 1, wherein the identification code is a cell radio network temporary identity C-RNTI.
7. A system information transmission method in an NR-U system according to claim 3, characterized in that the existing RRC dedicated message is an RRC reconfiguration message.
8. A system information transmission method in an NR-U system, applied to a terminal, comprising:
reporting SI request information to a base station, wherein the SI request information carries an identification code of UE (user equipment) so as to trigger the base station to judge whether available unlicensed spectrum resources exist in an SI window associated with a target SI, and the target SI is the SI requested by the UE and indicated by the SI request information;
when no unlicensed spectrum resource exists in the SI window, receiving the target SI issued by the base station by utilizing an RRC proprietary message;
and when the available unlicensed spectrum resources exist in the SI window, receiving the target SI broadcasted by the base station.
9. A base station, comprising:
the acquisition module is used for acquiring system information SI request information reported by a target terminal UE, wherein the SI request information carries an identification code of the target UE;
a transmitting module, configured to transmit, if it is determined that there is no available unlicensed spectrum resource in an SI window associated with a target SI, the target SI to the target UE by using an RRC dedicated message when a subsequent listen-before-talk LBT is successful, where the target SI is an SI requested by the target UE and indicated by the SI request information;
and the broadcasting module is used for broadcasting the target SI if judging that the available unlicensed spectrum resources exist in the SI window.
10. A terminal, comprising:
the reporting module is used for reporting SI request information to a base station, wherein the SI request information carries an identification code of UE (user equipment) so as to trigger the base station to judge whether available unlicensed spectrum resources exist in an SI window associated with a target SI, and the target SI is the SI which is indicated by the SI request information and requested by the UE;
a first receiving module, configured to receive, when there is no unlicensed spectrum resource available in the SI window, the target SI issued by the base station using an RRC dedicated message;
and the second receiving module is used for receiving the target SI broadcasted by the base station when the available unlicensed spectrum resources exist in the SI window.
11. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that the processor, when executing the computer program, realizes the steps of the system information transmission method in the NR-U system according to any one of claims 1 to 8.
12. A non-transitory computer readable storage medium having stored thereon a computer program, characterized in that the steps of the system information transmission method in the NR-U system according to any of claims 1 to 8 are implemented when the computer program is executed by a processor.
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Non-Patent Citations (4)
| Title |
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| dedicated RRC signaling for request and delivery of on-demand SI in NR-U;Ericsson;3GPP TSG-RAN WG2#103bis，R2-1815047;正文第1-2页 * |
| R2-1815047 "Dedicated RRC signaling for request and delivery of on-demand SI in NR-U";Ericsson;《3GPP tsg_ran\wg2_rl2》;20180928;参见正文第1-2页 * |
| R2-1905700 "SI scheduling enhancements for NR-U";Mediatek India Technology Pvt.;《3GPP tsg_ran\wg2_rl2》;20190503;参见正文第1-5页 * |
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