CN112235091A

CN112235091A - Intelligent tourist attraction notice information transmission method and system based on shared frequency spectrum

Info

Publication number: CN112235091A
Application number: CN202011083227.9A
Authority: CN
Inventors: 赵庭雪; 施亚冬
Original assignee: Nantong Xinkai Computer Information Technology Co ltd
Current assignee: Nantong Xinkai Computer Information Technology Co ltd
Priority date: 2020-10-12
Filing date: 2020-10-12
Publication date: 2021-01-15

Abstract

The invention discloses an intelligent tourist attraction announcement information transmission method based on shared spectrum, which comprises the following steps: generating notice information by a tourist attraction center server; transmitting, by the tourist attraction center server, the announcement information to the base station in response to the generation of the announcement information; performing, by the base station, an LBT procedure on the first and second sub-bands of the shared spectrum, respectively, in response to receiving the announcement information; if the LBT procedure performed on the first sub-band of the shared spectrum is successful and the LBT procedure performed on the second sub-band of the shared spectrum is successful, transmitting, by the base station, a first preamble and a first PDCCH message to the first smart terminal on the first sub-band and transmitting, by the base station, a second preamble and a second PDCCH message to the second smart terminal on the second sub-band; in response to transmitting the first preamble and the first PDCCH message to the first smart terminal and transmitting the second preamble and the second PDCCH message to the second smart terminal, transmitting, by the base station, the first PDSCH message to the first smart terminal.

Description

Intelligent tourist attraction notice information transmission method and system based on shared frequency spectrum

Technical Field

The invention relates to the technical field of intelligent travel, in particular to an intelligent tourist attraction announcement information transmission method and system based on shared spectrum.

Background

The intelligent cultural tourism, namely the intelligent cultural tourism, is internally driven by local characteristic culture element cores and mainly takes modern science and technology as a main means, so that the final purpose of comprehensively and intelligently upgrading the tourist attraction is achieved.

The prior art CN110930121A discloses an industry integrated management system based on an intelligent travel, which belongs to the technical field of travel project management and comprises a management end and a declaration end, wherein the declaration end comprises a project declaration unit, an information input unit and an auditing unit, the information input unit comprises a character input module and an image input module, the auditing unit comprises a primary auditing module and a secondary auditing module, and the management end comprises an overview unit, a project management unit, an analysis and evaluation unit and an inspection feedback unit.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

Disclosure of Invention

The invention aims to provide an intelligent tourist attraction announcement information transmission method and system based on a shared spectrum, which can overcome the defects of the prior art.

In order to achieve the above object, the present invention provides an intelligent tourist attraction announcement information transmission method based on shared spectrum, which comprises the following steps: generating notice information by a tourist attraction center server; transmitting, by the tourist attraction center server, the announcement information to the base station in response to the generation of the announcement information; performing, by the base station, an LBT procedure on the first and second sub-bands of the shared spectrum, respectively, in response to receiving the announcement information; if the LBT procedure performed on the first sub-band of the shared spectrum is successful and the LBT procedure performed on the second sub-band of the shared spectrum is successful, transmitting, by the base station, a first preamble and a first PDCCH message to the first smart terminal on the first sub-band and transmitting, by the base station, a second preamble and a second PDCCH message to the second smart terminal on the second sub-band; in response to transmitting a first preamble and a first PDCCH message to a first smart terminal and a second preamble and a second PDCCH message to a second smart terminal, transmitting, by the base station, a first PDSCH message to the first smart terminal, wherein the first PDSCH message includes announcement information and transmitting, by the base station, a second PDSCH message to the second smart terminal, wherein the second PDSCH message includes announcement information; in response to receiving the first preamble, determining, by the first smart terminal, a time-frequency resource for transmitting the first PDCCH message based on the first preamble; receiving, by the first smart terminal, the first PDCCH message in response to determining the time-frequency resources for transmitting the first PDCCH message; in response to receiving the first PDCCH message, receiving, by the first smart terminal, the first PDSCH message on PDSCH resources indicated in the first PDCCH message based on the indication of the PDSCH resources; in response to receiving the first PDSCH message, the first smart terminal determines whether the first PDSCH message can be correctly decoded; and if the first PDSCH message can be correctly decoded, carrying out an LBT process by the first intelligent terminal.

In a preferred embodiment, the method for transmitting the intelligent tourist attraction notice information based on the shared frequency spectrum comprises the following steps: if the first intelligent terminal successfully performs the LBT process, the first intelligent terminal sends an ACK message to the base station at the first PUCCH message sending opportunity;

if the first intelligent terminal does not successfully perform the LBT process, the first intelligent terminal performs the LBT process again; if the first intelligent terminal succeeds in performing the LBT process again, the first intelligent terminal sends an ACK message aiming at the first PDSCH message to the base station at the sending opportunity of the second PUCCH message; if the first intelligent terminal receives the third lead code again after receiving the first PDSCH message, determining, by the first intelligent terminal, a time-frequency resource for transmitting a third PDCCH message based on the third lead code, wherein the third lead code and the third PDCCH message are transmitted to the first intelligent terminal by the base station; receiving, by the first smart terminal, the third PDCCH message in response to determining the time-frequency resource for transmitting the third PDCCH message; in response to receiving the third PDCCH message, receiving, by the first smart terminal, the third PDSCH message on the PDSCH resources indicated in the third PDCCH message based on the indication of the PDSCH resources; in response to receiving the third PDSCH message, the first smart terminal determines whether the third PDSCH message can be decoded correctly; if the third PDSCH message can be correctly decoded, the first intelligent terminal performs an LBT process; and if the first intelligent terminal successfully performs the LBT process, transmitting an ACK message aiming at the third PDSCH message to the base station by the first intelligent terminal at the second PUCCH message transmission opportunity, wherein the ACK message aiming at the first PDSCH message and the ACK message aiming at the third PDSCH message are frequency division multiplexed.

In a preferred embodiment, the method for transmitting the intelligent tourist attraction notice information based on the shared frequency spectrum comprises the following steps: in response to receiving the second preamble, determining, by the second smart terminal, a time-frequency resource for transmitting the second PDCCH message based on the second preamble; receiving, by the second smart terminal, the second PDCCH message in response to determining the time-frequency resources for transmitting the second PDCCH message; in response to receiving the second PDCCH message, receiving, by the second smart terminal, the second PDSCH message on the PDSCH resources indicated in the second PDCCH message based on the indication of the PDSCH resources; in response to receiving the second PDSCH message, the second smart terminal determines whether the second PDSCH message can be decoded correctly; if the second PDSCH message can be correctly decoded, the second intelligent terminal performs an LBT process; if the second intelligent terminal successfully performs the LBT process, the second intelligent terminal sends an ACK message to the base station at the third PUCCH message sending opportunity; if the second intelligent terminal does not successfully perform the LBT process, the second intelligent terminal performs the LBT process again; if the second intelligent terminal succeeds in the LBT process again, the second intelligent terminal sends an ACK message aiming at the second PDSCH message to the base station at the sending opportunity of the fourth PUCCH message; if the second smart terminal receives the fourth preamble again after receiving the second PDSCH message, determining, by the second smart terminal, a time-frequency resource for transmitting a fourth PDCCH message based on the fourth preamble, wherein the fourth preamble and the fourth PDCCH message are transmitted to the second smart terminal by the base station; receiving, by the second smart terminal, the fourth PDCCH message in response to determining the time-frequency resources for transmitting the fourth PDCCH message; in response to receiving the fourth PDCCH message, receiving, by the second smart terminal, the fourth PDSCH message on the PDSCH resources indicated in the fourth PDCCH message based on the indication of the PDSCH resources; in response to receiving the fourth PDSCH message, the second smart terminal determines whether the fourth PDSCH message can be decoded correctly; if the fourth PDSCH message can be correctly decoded, the second intelligent terminal performs an LBT process; and if the second intelligent terminal successfully performs the LBT process, transmitting an ACK message aiming at a fourth PDSCH message to the base station by the second intelligent terminal at a fourth PUCCH message transmission opportunity, wherein the ACK message aiming at the second PDSCH message and the ACK message aiming at the fourth PDSCH message are subjected to frequency division multiplexing.

In a preferred embodiment, the method for transmitting the intelligent tourist attraction notice information based on the shared frequency spectrum comprises the following steps: if an LBT procedure performed on a first sub-band of a shared spectrum is successful and an LBT procedure performed on a second sub-band of the shared spectrum is unsuccessful, transmitting, by a base station, a first preamble and a first PDCCH message to a first smart terminal on the first sub-band and transmitting, by the base station, a second preamble and a second PDCCH message to a second smart terminal on the first sub-band, wherein the first preamble and the first PDCCH message are time division multiplexed with the second preamble and the second PDCCH message; in response to transmitting a first preamble and a first PDCCH message to a first smart terminal and a second preamble and a second PDCCH message to a second smart terminal, transmitting, by the base station, a first PDSCH message to the first smart terminal, wherein the first PDSCH message includes announcement information and transmitting, by the base station, a second PDSCH message to the second smart terminal, wherein the second PDSCH message includes announcement information; in response to receiving the first preamble, determining, by the first smart terminal, a time-frequency resource for transmitting the first PDCCH message based on the first preamble; receiving, by the first smart terminal, the first PDCCH message in response to determining the time-frequency resources for transmitting the first PDCCH message; in response to receiving the first PDCCH message, receiving, by the first smart terminal, the first PDSCH message on PDSCH resources indicated in the first PDCCH message based on the indication of the PDSCH resources; in response to receiving the first PDSCH message, the first smart terminal determines whether the first PDSCH message can be correctly decoded; if the first PDSCH message can be correctly decoded, the first intelligent terminal carries out an LBT process; if the first intelligent terminal successfully performs the LBT process, the first intelligent terminal sends an ACK message to the base station at the first PUCCH message sending opportunity; if the first intelligent terminal does not successfully perform the LBT process, the first intelligent terminal performs the LBT process again; if the first intelligent terminal succeeds in performing the LBT process again, the first intelligent terminal sends an ACK message aiming at the first PDSCH message to the base station at the sending opportunity of the second PUCCH message; if the first intelligent terminal receives the third lead code again after receiving the first PDSCH message, determining, by the first intelligent terminal, a time-frequency resource for transmitting a third PDCCH message based on the third lead code, wherein the third lead code and the third PDCCH message are transmitted to the first intelligent terminal by the base station; receiving, by the first smart terminal, the third PDCCH message in response to determining the time-frequency resource for transmitting the third PDCCH message; in response to receiving the third PDCCH message, receiving, by the first smart terminal, the third PDSCH message on the PDSCH resources indicated in the third PDCCH message based on the indication of the PDSCH resources; in response to receiving the third PDSCH message, the first smart terminal determines whether the third PDSCH message can be decoded correctly; if the third PDSCH message can be correctly decoded, the first intelligent terminal performs an LBT process; and if the first intelligent terminal successfully performs the LBT process, transmitting an ACK message aiming at the third PDSCH message to the base station by the first intelligent terminal at the second PUCCH message transmission opportunity, wherein the ACK message aiming at the first PDSCH message and the ACK message aiming at the third PDSCH message are frequency division multiplexed.

The invention also provides an intelligent tourist attraction announcement information transmission system based on the shared spectrum, which comprises the following steps: a unit for generating announcement information by the tourist attraction center server; means for transmitting, by the tourist attraction center server, the announcement information to the base station in response to generating the announcement information; means for performing, by a base station, an LBT procedure over a first sub-band and a second sub-band of a shared spectrum, respectively, in response to receiving the advertisement information; means for transmitting, by the base station, a first preamble and a first PDCCH message to the first smart terminal on a first subband and a second preamble and a second PDCCH message to the second smart terminal on a second subband if an LBT procedure performed on the first subband of the shared spectrum is successful and an LBT procedure performed on the second subband of the shared spectrum is successful; means for transmitting, by a base station, a first PDSCH message to a first smart terminal in response to transmitting a first preamble and a first PDCCH message to the first smart terminal and transmitting a second preamble and a second PDCCH message to a second smart terminal, wherein the first PDSCH message includes announcement information and the second PDSCH message is transmitted by the base station to the second smart terminal, wherein the second PDSCH message includes announcement information; means for determining, by the first smart terminal, a time-frequency resource for transmitting the first PDCCH message based on the first preamble in response to receiving the first preamble; means for receiving, by a first smart terminal, a first PDCCH message in response to determining a time-frequency resource for transmitting the first PDCCH message; means for receiving, by the first smart terminal, in response to receiving the first PDCCH message, a first PDSCH message on PDSCH resources indicated based on the indication of PDSCH resources in the first PDCCH message; means for determining, by the first smart terminal, whether the first PDSCH message can be correctly decoded in response to receiving the first PDSCH message; means for performing an LBT procedure by the first smart terminal if it is determined that the first PDSCH message can be correctly decoded.

In a preferred embodiment, the shared spectrum based intelligent tourist attraction announcement information transmission system: means for sending, by the first intelligent terminal, an ACK message to the base station at a first PUCCH message sending opportunity if the first intelligent terminal successfully performs the LBT procedure; means for performing, by the first smart terminal, the LBT procedure again if the first smart terminal did not successfully perform the LBT procedure; means for transmitting, by the first smart terminal, an ACK message for the first PDSCH message to the base station at the second PUCCH message transmission occasion if the first smart terminal succeeds in performing the LBT procedure again; means for determining, by the first smart terminal, a time-frequency resource for transmitting a third PDCCH message based on the third preamble if the third preamble is received again by the first smart terminal after receiving the first PDSCH message, wherein the third preamble and the third PDCCH message are transmitted to the first smart terminal by the base station; means for receiving, by the first smart terminal, a third PDCCH message in response to determining a time-frequency resource for transmitting the third PDCCH message; means for receiving, by the first smart terminal, in response to receiving the third PDCCH message, a third PDSCH message on PDSCH resources indicated in the third PDCCH message based on the indication of the PDSCH resources; means for determining, by the first smart terminal, whether the third PDSCH message can be decoded correctly in response to receiving the third PDSCH message; means for performing an LBT procedure by the first smart terminal if it is determined that the third PDSCH message can be decoded correctly; means for transmitting, by the first smart terminal, an ACK message for a third PDSCH message to the base station at a second PUCCH message transmission occasion if the first smart terminal successfully performs the LBT procedure, wherein the ACK message for the first PDSCH message is frequency division multiplexed with the ACK message for the third PDSCH message.

In a preferred embodiment, the shared spectrum based intelligent tourist attraction announcement information transmission system: means for determining, by the second smart terminal, a time-frequency resource for transmitting the second PDCCH message based on the second preamble in response to receiving the second preamble; means for receiving, by the second smart terminal, the second PDCCH message in response to determining the time-frequency resources for transmitting the second PDCCH message; means for receiving, by the second smart terminal, in response to receiving the second PDCCH message, a second PDSCH message on PDSCH resources indicated in the second PDCCH message based on the indication of the PDSCH resources; means for determining, by the second smart terminal, whether the second PDSCH message can be correctly decoded in response to receiving the second PDSCH message; means for performing an LBT procedure by the second smart terminal if it is determined that the second PDSCH message can be decoded correctly; means for sending, by the second intelligent terminal, an ACK message to the base station at a third PUCCH message sending opportunity if the second intelligent terminal successfully performs the LBT procedure; means for performing, by the second smart terminal, the LBT procedure again if the second smart terminal did not successfully perform the LBT procedure; means for sending, by the second smart terminal, an ACK message for the second PDSCH message to the base station at the fourth PUCCH message sending occasion if the second smart terminal succeeds in performing the LBT procedure again; means for determining, by the second smart terminal, a time-frequency resource for transmitting a fourth PDCCH message based on a fourth preamble if the second smart terminal receives the fourth preamble again after receiving the second PDSCH message, wherein the fourth preamble and the fourth PDCCH message are transmitted to the second smart terminal by the base station; means for receiving, by the second smart terminal, the fourth PDCCH message in response to determining the time-frequency resources for transmitting the fourth PDCCH message; means for receiving, by the second smart terminal, in response to receiving the fourth PDCCH message, a fourth PDSCH message on PDSCH resources indicated in the fourth PDCCH message based on the indication of the PDSCH resources; a unit for responding to the received fourth PDSCH message, and judging by the second smart terminal whether the fourth PDSCH message can be correctly decoded; means for performing an LBT procedure by the second smart terminal if it is determined that the fourth PDSCH message can be decoded correctly; means for transmitting, by the second smart terminal, an ACK message for a fourth PDSCH message to the base station at a fourth PUCCH message transmission occasion if the second smart terminal successfully performs the LBT procedure, wherein the ACK message for the second PDSCH message is frequency division multiplexed with the ACK message for the fourth PDSCH message.

In a preferred embodiment, the shared spectrum based intelligent tourist attraction announcement information transmission system: means for transmitting, by a base station, a first preamble and a first PDCCH message to a first smart terminal on a first sub-band and a second preamble and a second PDCCH message to a second smart terminal on the first sub-band if an LBT procedure performed on the first sub-band of the shared spectrum is successful and an LBT procedure performed on a second sub-band of the shared spectrum is unsuccessful, wherein the first preamble and the first PDCCH message are time division multiplexed with the second preamble and the second PDCCH message; means for transmitting, by a base station, a first PDSCH message to a first smart terminal in response to transmitting a first preamble and a first PDCCH message to the first smart terminal and transmitting a second preamble and a second PDCCH message to a second smart terminal, wherein the first PDSCH message includes announcement information and the second PDSCH message is transmitted by the base station to the second smart terminal, wherein the second PDSCH message includes announcement information; means for determining, by the first smart terminal, a time-frequency resource for transmitting the first PDCCH message based on the first preamble in response to receiving the first preamble; means for receiving, by a first smart terminal, a first PDCCH message in response to determining a time-frequency resource for transmitting the first PDCCH message; means for receiving, by the first smart terminal, in response to receiving the first PDCCH message, a first PDSCH message on PDSCH resources indicated based on the indication of PDSCH resources in the first PDCCH message; means for determining, by the first smart terminal, whether the first PDSCH message can be correctly decoded in response to receiving the first PDSCH message; means for performing an LBT procedure by the first smart terminal if it is determined that the first PDSCH message can be decoded correctly; means for sending, by the first intelligent terminal, an ACK message to the base station at a first PUCCH message sending opportunity if the first intelligent terminal successfully performs the LBT procedure; means for performing, by the first smart terminal, the LBT procedure again if the first smart terminal did not successfully perform the LBT procedure; means for transmitting, by the first smart terminal, an ACK message for the first PDSCH message to the base station at the second PUCCH message transmission occasion if the first smart terminal succeeds in performing the LBT procedure again; means for determining, by the first smart terminal, a time-frequency resource for transmitting a third PDCCH message based on the third preamble if the third preamble is received again by the first smart terminal after receiving the first PDSCH message, wherein the third preamble and the third PDCCH message are transmitted to the first smart terminal by the base station; means for receiving, by the first smart terminal, a third PDCCH message in response to determining a time-frequency resource for transmitting the third PDCCH message; means for receiving, by the first smart terminal, in response to receiving the third PDCCH message, a third PDSCH message on PDSCH resources indicated in the third PDCCH message based on the indication of the PDSCH resources; means for determining, by the first smart terminal, whether the third PDSCH message can be decoded correctly in response to receiving the third PDSCH message; means for performing an LBT procedure by the first smart terminal if it is determined that the third PDSCH message can be decoded correctly; means for transmitting, by the first smart terminal, an ACK message for a third PDSCH message to the base station at a second PUCCH message transmission occasion if the first smart terminal successfully performs the LBT procedure, wherein the ACK message for the first PDSCH message is frequency division multiplexed with the ACK message for the third PDSCH message.

Compared with the prior art, the invention has the following advantages: at present, multimedia information in tourist attractions (including various museums) is generally monotonous, which causes the problem that young tourists have little interest in tourism. In addition, many scenic spot introductions still stay on paper advertisements and simple word introductions at present, the transmission mode wastes paper, and due to the limitation of word transmission information (such as word number limitation, reading amount limitation and the like), the word transmission cannot well transmit all historical appearances or natural appearances of scenic spots. To this problem, the wisdom literary composition tourism notion based on thing networking and 5G technique comes to the ship, through thing networking and wireless transmission's method, can be with multimedia information rapid transmission to any one corner of scenic spot, this can be very big make things convenient for visitor's play to improve visitor's experience, this application is directed against prior art's problem, has provided an intelligence tourist spot notice information transmission method and system based on shared spectrum.

Drawings

Fig. 1 is a schematic diagram of a system architecture according to an embodiment of the present invention.

FIG. 2 is a flow diagram of a method according to an embodiment of the invention.

Detailed Description

The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.

Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.

Example 1:

FIG. 2 is a flow diagram of a method according to an embodiment of the invention. As shown in the figure, the intelligent tourist attraction announcement information transmission method based on the shared spectrum of the invention comprises the following steps:

step 101: generating notice information by a tourist attraction center server; the announcement information may be advertisement information, seeker information, multimedia information provided according to the guest's preferences, and the like;

step 102: transmitting, by the tourist attraction center server, the announcement information to the base station in response to the generation of the announcement information;

step 103: performing, by the base station, an LBT procedure on the first and second sub-bands of the shared spectrum, respectively, in response to receiving the announcement information;

step 104: if the LBT procedure performed on the first sub-band of the shared spectrum is successful and the LBT procedure performed on the second sub-band of the shared spectrum is successful, transmitting, by the base station, a first preamble and a first PDCCH message to the first smart terminal on the first sub-band and transmitting, by the base station, a second preamble and a second PDCCH message to the second smart terminal on the second sub-band;

step 105: in response to transmitting a first preamble and a first PDCCH message to a first smart terminal and a second preamble and a second PDCCH message to a second smart terminal, transmitting, by the base station, a first PDSCH message to the first smart terminal, wherein the first PDSCH message includes announcement information and transmitting, by the base station, a second PDSCH message to the second smart terminal, wherein the second PDSCH message includes announcement information;

step 106: in response to receiving the first preamble, determining, by the first smart terminal, a time-frequency resource for transmitting the first PDCCH message based on the first preamble;

step 107: receiving, by the first smart terminal, the first PDCCH message in response to determining the time-frequency resources for transmitting the first PDCCH message;

step 108: in response to receiving the first PDCCH message, receiving, by the first smart terminal, the first PDSCH message on PDSCH resources indicated in the first PDCCH message based on the indication of the PDSCH resources;

step 109: in response to receiving the first PDSCH message, the first smart terminal determines whether the first PDSCH message can be correctly decoded;

step 110: and if the first PDSCH message can be correctly decoded, carrying out an LBT process by the first intelligent terminal. The first and second intelligent terminals may be displays having a wireless communication function.

In a preferred embodiment, the method for transmitting the intelligent tourist attraction notice information based on the shared frequency spectrum comprises the following steps: if the first intelligent terminal successfully performs the LBT process, the first intelligent terminal sends an ACK message to the base station at the first PUCCH message sending opportunity; if the first intelligent terminal does not successfully perform the LBT process, the first intelligent terminal performs the LBT process again; if the first intelligent terminal succeeds in performing the LBT process again, the first intelligent terminal sends an ACK message aiming at the first PDSCH message to the base station at the sending opportunity of the second PUCCH message; if the first intelligent terminal receives the third lead code again after receiving the first PDSCH message, determining, by the first intelligent terminal, a time-frequency resource for transmitting a third PDCCH message based on the third lead code, wherein the third lead code and the third PDCCH message are transmitted to the first intelligent terminal by the base station; receiving, by the first smart terminal, the third PDCCH message in response to determining the time-frequency resource for transmitting the third PDCCH message; in response to receiving the third PDCCH message, receiving, by the first smart terminal, the third PDSCH message on the PDSCH resources indicated in the third PDCCH message based on the indication of the PDSCH resources; in response to receiving the third PDSCH message, the first smart terminal determines whether the third PDSCH message can be decoded correctly; if the third PDSCH message can be correctly decoded, the first intelligent terminal performs an LBT process; and if the first intelligent terminal successfully performs the LBT process, transmitting an ACK message aiming at the third PDSCH message to the base station by the first intelligent terminal at the second PUCCH message transmission opportunity, wherein the ACK message aiming at the first PDSCH message and the ACK message aiming at the third PDSCH message are frequency division multiplexed.

Example 2:

in a preferred embodiment, the method for transmitting the intelligent tourist attraction notice information based on the shared frequency spectrum further comprises the following steps: if an LBT procedure performed on a first sub-band of a shared spectrum is successful and an LBT procedure performed on a second sub-band of the shared spectrum is unsuccessful, transmitting, by a base station, a first preamble and a first PDCCH message to a first smart terminal on the first sub-band and transmitting, by the base station, a second preamble and a second PDCCH message to a second smart terminal on the first sub-band, wherein the first preamble and the first PDCCH message are time division multiplexed with the second preamble and the second PDCCH message; in response to transmitting a first preamble and a first PDCCH message to a first smart terminal and a second preamble and a second PDCCH message to a second smart terminal, transmitting, by the base station, a first PDSCH message to the first smart terminal, wherein the first PDSCH message includes announcement information and transmitting, by the base station, a second PDSCH message to the second smart terminal, wherein the second PDSCH message includes announcement information; in response to receiving the first preamble, determining, by the first smart terminal, a time-frequency resource for transmitting the first PDCCH message based on the first preamble; receiving, by the first smart terminal, the first PDCCH message in response to determining the time-frequency resources for transmitting the first PDCCH message; in response to receiving the first PDCCH message, receiving, by the first smart terminal, the first PDSCH message on PDSCH resources indicated in the first PDCCH message based on the indication of the PDSCH resources; in response to receiving the first PDSCH message, the first smart terminal determines whether the first PDSCH message can be correctly decoded; if the first PDSCH message can be correctly decoded, the first intelligent terminal carries out an LBT process; if the first intelligent terminal successfully performs the LBT process, the first intelligent terminal sends an ACK message to the base station at the first PUCCH message sending opportunity; if the first intelligent terminal does not successfully perform the LBT process, the first intelligent terminal performs the LBT process again; if the first intelligent terminal succeeds in performing the LBT process again, the first intelligent terminal sends an ACK message aiming at the first PDSCH message to the base station at the sending opportunity of the second PUCCH message; if the first intelligent terminal receives the third lead code again after receiving the first PDSCH message, determining, by the first intelligent terminal, a time-frequency resource for transmitting a third PDCCH message based on the third lead code, wherein the third lead code and the third PDCCH message are transmitted to the first intelligent terminal by the base station; receiving, by the first smart terminal, the third PDCCH message in response to determining the time-frequency resource for transmitting the third PDCCH message; in response to receiving the third PDCCH message, receiving, by the first smart terminal, the third PDSCH message on the PDSCH resources indicated in the third PDCCH message based on the indication of the PDSCH resources; in response to receiving the third PDSCH message, the first smart terminal determines whether the third PDSCH message can be decoded correctly; if the third PDSCH message can be correctly decoded, the first intelligent terminal performs an LBT process; and if the first intelligent terminal successfully performs the LBT process, transmitting an ACK message aiming at the third PDSCH message to the base station by the first intelligent terminal at the second PUCCH message transmission opportunity, wherein the ACK message aiming at the first PDSCH message and the ACK message aiming at the third PDSCH message are frequency division multiplexed.

Example 3:

in this embodiment, the present invention provides an intelligent tourist attraction announcement information transmission system based on shared spectrum, including: a unit for generating announcement information by the tourist attraction center server; means for transmitting, by the tourist attraction center server, the announcement information to the base station in response to generating the announcement information; means for performing, by a base station, an LBT procedure over a first sub-band and a second sub-band of a shared spectrum, respectively, in response to receiving the advertisement information; means for transmitting, by the base station, a first preamble and a first PDCCH message to the first smart terminal on a first subband and a second preamble and a second PDCCH message to the second smart terminal on a second subband if an LBT procedure performed on the first subband of the shared spectrum is successful and an LBT procedure performed on the second subband of the shared spectrum is successful; means for transmitting, by a base station, a first PDSCH message to a first smart terminal in response to transmitting a first preamble and a first PDCCH message to the first smart terminal and transmitting a second preamble and a second PDCCH message to a second smart terminal, wherein the first PDSCH message includes announcement information and the second PDSCH message is transmitted by the base station to the second smart terminal, wherein the second PDSCH message includes announcement information; means for determining, by the first smart terminal, a time-frequency resource for transmitting the first PDCCH message based on the first preamble in response to receiving the first preamble; means for receiving, by a first smart terminal, a first PDCCH message in response to determining a time-frequency resource for transmitting the first PDCCH message; means for receiving, by the first smart terminal, in response to receiving the first PDCCH message, a first PDSCH message on PDSCH resources indicated based on the indication of PDSCH resources in the first PDCCH message; means for determining, by the first smart terminal, whether the first PDSCH message can be correctly decoded in response to receiving the first PDSCH message; means for performing an LBT procedure by the first smart terminal if it is determined that the first PDSCH message can be correctly decoded.

In a preferred embodiment, the intelligent shared spectrum based tourist attraction announcement information transmission system comprises: means for sending, by the first intelligent terminal, an ACK message to the base station at a first PUCCH message sending opportunity if the first intelligent terminal successfully performs the LBT procedure; means for performing, by the first smart terminal, the LBT procedure again if the first smart terminal did not successfully perform the LBT procedure; means for transmitting, by the first smart terminal, an ACK message for the first PDSCH message to the base station at the second PUCCH message transmission occasion if the first smart terminal succeeds in performing the LBT procedure again; means for determining, by the first smart terminal, a time-frequency resource for transmitting a third PDCCH message based on the third preamble if the third preamble is received again by the first smart terminal after receiving the first PDSCH message, wherein the third preamble and the third PDCCH message are transmitted to the first smart terminal by the base station; means for receiving, by the first smart terminal, a third PDCCH message in response to determining a time-frequency resource for transmitting the third PDCCH message; means for receiving, by the first smart terminal, in response to receiving the third PDCCH message, a third PDSCH message on PDSCH resources indicated in the third PDCCH message based on the indication of the PDSCH resources; means for determining, by the first smart terminal, whether the third PDSCH message can be decoded correctly in response to receiving the third PDSCH message; means for performing an LBT procedure by the first smart terminal if it is determined that the third PDSCH message can be decoded correctly; means for transmitting, by the first smart terminal, an ACK message for a third PDSCH message to the base station at a second PUCCH message transmission occasion if the first smart terminal successfully performs the LBT procedure, wherein the ACK message for the first PDSCH message is frequency division multiplexed with the ACK message for the third PDSCH message.

Example 4:

in a preferred embodiment, the intelligent shared spectrum based tourist attraction announcement information transmission system further comprises: means for transmitting, by a base station, a first preamble and a first PDCCH message to a first smart terminal on a first sub-band and a second preamble and a second PDCCH message to a second smart terminal on the first sub-band if an LBT procedure performed on the first sub-band of the shared spectrum is successful and an LBT procedure performed on a second sub-band of the shared spectrum is unsuccessful, wherein the first preamble and the first PDCCH message are time division multiplexed with the second preamble and the second PDCCH message; means for transmitting, by a base station, a first PDSCH message to a first smart terminal in response to transmitting a first preamble and a first PDCCH message to the first smart terminal and transmitting a second preamble and a second PDCCH message to a second smart terminal, wherein the first PDSCH message includes announcement information and the second PDSCH message is transmitted by the base station to the second smart terminal, wherein the second PDSCH message includes announcement information; means for determining, by the first smart terminal, a time-frequency resource for transmitting the first PDCCH message based on the first preamble in response to receiving the first preamble; means for receiving, by a first smart terminal, a first PDCCH message in response to determining a time-frequency resource for transmitting the first PDCCH message; means for receiving, by the first smart terminal, in response to receiving the first PDCCH message, a first PDSCH message on PDSCH resources indicated based on the indication of PDSCH resources in the first PDCCH message; means for determining, by the first smart terminal, whether the first PDSCH message can be correctly decoded in response to receiving the first PDSCH message; means for performing an LBT procedure by the first smart terminal if it is determined that the first PDSCH message can be decoded correctly; means for sending, by the first intelligent terminal, an ACK message to the base station at a first PUCCH message sending opportunity if the first intelligent terminal successfully performs the LBT procedure; means for performing, by the first smart terminal, the LBT procedure again if the first smart terminal did not successfully perform the LBT procedure; means for transmitting, by the first smart terminal, an ACK message for the first PDSCH message to the base station at the second PUCCH message transmission occasion if the first smart terminal succeeds in performing the LBT procedure again; means for determining, by the first smart terminal, a time-frequency resource for transmitting a third PDCCH message based on the third preamble if the third preamble is received again by the first smart terminal after receiving the first PDSCH message, wherein the third preamble and the third PDCCH message are transmitted to the first smart terminal by the base station; means for receiving, by the first smart terminal, a third PDCCH message in response to determining a time-frequency resource for transmitting the third PDCCH message; means for receiving, by the first smart terminal, in response to receiving the third PDCCH message, a third PDSCH message on PDSCH resources indicated in the third PDCCH message based on the indication of the PDSCH resources; means for determining, by the first smart terminal, whether the third PDSCH message can be decoded correctly in response to receiving the third PDSCH message; means for performing an LBT procedure by the first smart terminal if it is determined that the third PDSCH message can be decoded correctly; means for transmitting, by the first smart terminal, an ACK message for a third PDSCH message to the base station at a second PUCCH message transmission occasion if the first smart terminal successfully performs the LBT procedure, wherein the ACK message for the first PDSCH message is frequency division multiplexed with the ACK message for the third PDSCH message.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims

1. An intelligent tourist attraction announcement information transmission method based on a shared spectrum is characterized by comprising the following steps:

generating notice information by a tourist attraction center server;

transmitting, by the tourist attraction center server, the announcement information to the base station in response to the generation of the announcement information;

performing, by a base station, an LBT procedure on a first sub-band and a second sub-band of a shared spectrum, respectively, in response to receiving the announcement information;

if an LBT procedure performed on a first sub-band of a shared spectrum is successful and an LBT procedure performed on a second sub-band of the shared spectrum is successful, transmitting, by a base station, a first preamble and a first PDCCH message to a first smart terminal on the first sub-band and transmitting, by the base station, a second preamble and a second PDCCH message to a second smart terminal on the second sub-band;

in response to transmitting a first preamble and a first PDCCH message to a first smart terminal and transmitting a second preamble and a second PDCCH message to a second smart terminal, transmitting, by a base station, a first PDSCH message to the first smart terminal, wherein the first PDSCH message comprises announcement information, and transmitting, by the base station, a second PDSCH message to the second smart terminal, wherein the second PDSCH message comprises announcement information;

in response to receiving the first preamble, determining, by a first smart terminal, time-frequency resources for transmitting the first PDCCH message based on the first preamble;

receiving, by a first smart terminal, the first PDCCH message in response to determining a time-frequency resource for transmitting the first PDCCH message;

in response to receiving the first PDCCH message, receiving, by a first smart terminal, the first PDSCH message on PDSCH resources indicated based on the indication of PDSCH resources in the first PDCCH message;

in response to receiving the first PDSCH message, determining, by a first smart terminal, whether the first PDSCH message can be correctly decoded;

and if the first PDSCH message can be correctly decoded, carrying out an LBT process by the first intelligent terminal.

2. The method as claimed in claim 1, wherein the method for transmitting the intelligent tourist area announcement information based on the shared spectrum comprises the steps of:

if the first intelligent terminal successfully performs the LBT process, the first intelligent terminal sends an ACK message to the base station at the first PUCCH message sending opportunity;

if the first intelligent terminal does not successfully perform the LBT process, the first intelligent terminal performs the LBT process again;

if the first intelligent terminal succeeds in performing the LBT process again, the first intelligent terminal sends an ACK message aiming at the first PDSCH message to the base station at the second PUCCH message sending opportunity;

determining, by the first smart terminal, a time-frequency resource for transmitting a third PDCCH message based on a third preamble if the third preamble is received again by the first smart terminal after receiving the first PDSCH message, wherein the third preamble and the third PDCCH message are transmitted to the first smart terminal by a base station;

receiving, by the first smart terminal, the third PDCCH message in response to determining the time-frequency resources for transmitting the third PDCCH message;

in response to receiving the third PDCCH message, receiving, by the first smart terminal, a third PDSCH message on PDSCH resources indicated in the third PDCCH message based on the indication of PDSCH resources;

in response to receiving the third PDSCH message, determining, by the first smart terminal, whether the third PDSCH message can be correctly decoded;

if the third PDSCH message can be correctly decoded, the first intelligent terminal carries out an LBT process;

and if the first intelligent terminal successfully performs the LBT process, transmitting an ACK message aiming at a third PDSCH message to the base station by the first intelligent terminal at a second PUCCH message transmission opportunity, wherein the ACK message aiming at the first PDSCH message and the ACK message aiming at the third PDSCH message are frequency division multiplexed.

3. The method of transmitting intelligent shared-spectrum-based tourist attraction announcement information of claim 2, wherein the method of transmitting intelligent shared-spectrum-based tourist attraction announcement information comprises the steps of:

in response to receiving the second preamble, determining, by a second smart terminal, time-frequency resources for transmitting the second PDCCH message based on the second preamble;

receiving, by a second smart terminal, the second PDCCH message in response to determining time-frequency resources for transmitting the second PDCCH message;

in response to receiving the second PDCCH message, receiving, by a second smart terminal, the second PDSCH message on the indicated PDSCH resources based on an indication of PDSCH resources in the second PDCCH message;

in response to receiving the second PDSCH message, determining, by the second smart terminal, whether the second PDSCH message can be correctly decoded;

if the second PDSCH message can be correctly decoded, the second intelligent terminal carries out an LBT process;

if the second intelligent terminal successfully performs the LBT process, the second intelligent terminal sends an ACK message to the base station at the third PUCCH message sending opportunity;

if the second intelligent terminal does not successfully perform the LBT process, the second intelligent terminal performs the LBT process again;

if the second intelligent terminal succeeds in performing the LBT process again, the second intelligent terminal sends an ACK message aiming at the second PDSCH message to the base station at the sending opportunity of the fourth PUCCH message;

determining, by the second smart terminal, a time-frequency resource for transmitting a fourth PDCCH message based on a fourth preamble if the second smart terminal receives the fourth preamble again after receiving the second PDSCH message, wherein the fourth preamble and the fourth PDCCH message are transmitted to the second smart terminal by a base station;

receiving, by a second smart terminal, the fourth PDCCH message in response to determining a time-frequency resource for transmitting the fourth PDCCH message;

in response to receiving the fourth PDCCH message, receiving, by a second smart terminal, a fourth PDSCH message on PDSCH resources indicated in the fourth PDCCH message based on the PDSCH resources indicated;

in response to receiving the fourth PDSCH message, determining, by the second smart terminal, whether the fourth PDSCH message can be correctly decoded;

if the fourth PDSCH message can be correctly decoded, the second intelligent terminal carries out an LBT process;

and if the second intelligent terminal successfully performs the LBT process, transmitting an ACK message aiming at a fourth PDSCH message to the base station by the second intelligent terminal at a fourth PUCCH message transmission opportunity, wherein the ACK message aiming at the second PDSCH message and the ACK message aiming at the fourth PDSCH message are frequency division multiplexed.

4. The method of transmitting intelligent shared-spectrum-based tourist attraction announcement information of claim 3, wherein the method of transmitting intelligent shared-spectrum-based tourist attraction announcement information comprises the steps of:

if an LBT procedure performed on a first sub-band of a shared spectrum is successful and an LBT procedure performed on a second sub-band of the shared spectrum is unsuccessful, transmitting, by a base station, a first preamble and a first PDCCH message to a first smart terminal on the first sub-band and transmitting, by the base station, a second preamble and a second PDCCH message to a second smart terminal on the first sub-band, wherein the first preamble and the first PDCCH message are time division multiplexed with the second preamble and the second PDCCH message;

if the first PDSCH message can be correctly decoded, the first intelligent terminal carries out an LBT process;

5. The method of transmitting intelligent shared-spectrum-based tourist attraction announcement information of claim 4, wherein the method of transmitting intelligent shared-spectrum-based tourist attraction announcement information comprises the steps of:

receiving, by a second smart terminal, a fourth PDCCH message in response to determining a time-frequency resource for transmitting the fourth PDCCH message;

in response to receiving the fourth PDCCH message, receiving, by a second smart terminal, the fourth PDSCH message on PDSCH resources indicated in the fourth PDCCH message based on the indication of PDSCH resources;

6. An intelligent shared-spectrum-based tourist attraction announcement information transmission system, comprising:

a unit for generating announcement information by the tourist attraction center server;

means for transmitting, by the tourist attraction center server, the announcement information to the base station in response to generating the announcement information;

means for performing, by a base station, an LBT procedure over a first sub-band and a second sub-band of a shared spectrum, respectively, in response to receiving the advertisement information;

means for transmitting, by a base station, a first preamble and a first PDCCH message to a first smart terminal on a first subband of a shared spectrum and a second preamble and a second PDCCH message to a second smart terminal on a second subband of the shared spectrum, if an LBT procedure performed on the first subband succeeds and an LBT procedure performed on the second subband succeeds;

means for transmitting, by a base station, a first PDSCH message to a first smart terminal in response to transmitting a first preamble and a first PDCCH message to the first smart terminal and transmitting a second preamble and a second PDCCH message to a second smart terminal, wherein the first PDSCH message includes announcement information and a second PDSCH message is transmitted by the base station to the second smart terminal, wherein the second PDSCH message includes announcement information;

means for determining, by a first smart terminal, a time-frequency resource for transmitting the first PDCCH message based on the first preamble in response to receiving the first preamble;

means for receiving, by a first smart terminal, the first PDCCH message in response to determining time-frequency resources for transmitting the first PDCCH message;

means for receiving, by a first smart terminal, in response to receiving the first PDCCH message, the first PDSCH message on PDSCH resources indicated based on the indication of PDSCH resources in the first PDCCH message;

means for determining, by a first smart terminal, whether the first PDSCH message can be correctly decoded in response to receiving the first PDSCH message;

means for performing an LBT procedure by a first smart terminal if it is determined that the first PDSCH message can be correctly decoded.

7. The shared-spectrum-based intelligent tourist attraction announcement information transmitting system of claim 6, wherein said shared-spectrum-based intelligent tourist attraction announcement information transmitting system comprises:

means for sending, by the first intelligent terminal, an ACK message to the base station at a first PUCCH message sending opportunity if the first intelligent terminal successfully performs the LBT procedure;

means for performing, by the first smart terminal, the LBT procedure again if the first smart terminal did not successfully perform the LBT procedure;

means for transmitting, by the first smart terminal, an ACK message for the first PDSCH message to the base station at the second PUCCH message transmission occasion if the first smart terminal succeeds in performing the LBT procedure again;

means for determining, by the first smart terminal, a time-frequency resource for transmitting a third PDCCH message based on a third preamble if the third preamble is received again by the first smart terminal after receiving the first PDSCH message, wherein the third preamble and the third PDCCH message are transmitted to the first smart terminal by a base station;

means for receiving, by a first smart terminal, the third PDCCH message in response to determining time-frequency resources for transmitting the third PDCCH message;

means for receiving, by the first smart terminal, a third PDCCH message on PDSCH resources based on an indication of PDSCH resources in the third PDCCH message in response to receiving the third PDCCH message;

means for determining, by the first smart terminal, whether the third PDSCH message can be decoded correctly in response to receiving the third PDSCH message;

means for performing an LBT procedure by the first smart terminal if it is determined that the third PDSCH message can be correctly decoded;

means for transmitting, by the first smart terminal, an ACK message for a third PDSCH message to the base station at a second PUCCH message transmission occasion if the first smart terminal successfully performs an LBT procedure, wherein the ACK message for the first PDSCH message is frequency division multiplexed with the ACK message for the third PDSCH message.

8. The shared-spectrum-based intelligent tourist attraction announcement information transmission system of claim 7, wherein said shared-spectrum-based intelligent tourist attraction announcement information transmission system comprises:

means for determining, by a second smart terminal, a time-frequency resource for transmitting the second PDCCH message based on the second preamble in response to receiving the second preamble;

means for receiving, by a second smart terminal, the second PDCCH message in response to determining time-frequency resources for transmitting the second PDCCH message;

means for receiving, by a second smart terminal, in response to receiving the second PDCCH message, the second PDSCH message on PDSCH resources indicated based on the indication of PDSCH resources in the second PDCCH message;

means for determining, by a second smart terminal, whether the second PDSCH message can be correctly decoded in response to receiving the second PDSCH message;

means for performing an LBT procedure by a second smart terminal if it is determined that the second PDSCH message can be correctly decoded;

means for sending, by the second intelligent terminal, an ACK message to the base station at a third PUCCH message sending opportunity if the second intelligent terminal successfully performs the LBT procedure;

means for performing, by the second smart terminal, the LBT procedure again if the second smart terminal did not successfully perform the LBT procedure;

means for transmitting, by the second smart terminal, an ACK message for the second PDSCH message to the base station at a fourth PUCCH message transmission occasion if the second smart terminal succeeds in performing the LBT procedure again;

means for determining, by the second smart terminal, a time-frequency resource for transmitting a fourth PDCCH message based on a fourth preamble if the second smart terminal receives the fourth preamble again after receiving the second PDSCH message, wherein the fourth preamble and the fourth PDCCH message are transmitted to the second smart terminal by a base station;

means for receiving, by a second smart terminal, the fourth PDCCH message in response to determining time-frequency resources for transmitting the fourth PDCCH message;

means for receiving, by a second smart terminal, in response to receiving the fourth PDCCH message, a fourth PDSCH message on PDSCH resources indicated based on the indication of PDSCH resources in the fourth PDCCH message;

means for determining, by a second smart terminal, whether the fourth PDSCH message can be correctly decoded in response to receiving the fourth PDSCH message;

means for performing an LBT procedure by a second smart terminal if it is determined that the fourth PDSCH message can be correctly decoded;

means for transmitting, by the second smart terminal, an ACK message for a fourth PDSCH message to the base station at a fourth PUCCH message transmission occasion if the second smart terminal successfully performs the LBT procedure, wherein the ACK message for the second PDSCH message and the ACK message for the fourth PDSCH message are frequency division multiplexed.

9. The shared-spectrum-based intelligent tourist attraction announcement information transmission system of claim 8, wherein said shared-spectrum-based intelligent tourist attraction announcement information transmission system comprises:

means for transmitting, by a base station, a first preamble and a first PDCCH message to a first smart terminal on a first sub-band of a shared spectrum and a second preamble and a second PDCCH message to a second smart terminal on the first sub-band if an LBT procedure performed on the first sub-band is successful and an LBT procedure performed on a second sub-band of the shared spectrum is unsuccessful, wherein the first preamble and the first PDCCH message are time division multiplexed with the second preamble and the second PDCCH message;

means for performing an LBT procedure by a first smart terminal if it is determined that the first PDSCH message can be correctly decoded;

10. The shared-spectrum-based intelligent tourist attraction announcement information transmission system of claim 9, wherein said shared-spectrum-based intelligent tourist attraction announcement information transmission system comprises:

means for receiving, by a second smart terminal, a fourth PDCCH message in response to determining a time-frequency resource for transmitting the fourth PDCCH message;

means for receiving, by a second smart terminal, in response to receiving the fourth PDCCH message, the fourth PDSCH message on PDSCH resources indicated based on the indication of PDSCH resources in the fourth PDCCH message;