CN102833788B - Uplink data sending method, device and system - Google Patents

Abstract

The invention discloses an uplink data sending method, device and system. The uplink data sending method includes, according to the request information sent by the restricted mobile terminal with limited uplink transmission, returning the response information for instructing the restricted mobile terminal to perform uplink transmission to the restricted mobile terminal, and sending the assisted mobile terminal in the idle state in the service area The terminal sends an assistance request; after receiving the confirmation assistance information returned by the assisting mobile terminal according to the assistance request, and the uplink data sent by the restricted mobile terminal according to the response information, allocate uplink transmission resources and instruct the restricted mobile terminal on the first resource Send data, instructing to assist the mobile terminal to capture data on the first resource and use the second resource to forward; demodulate and combine the data received on the first resource and the second resource respectively, and obtain uplink data with enhanced signal strength . The SINR of receiving uplink data by the base station and the accuracy of demodulating uplink data can be improved, and the effect of uplink coverage of the base station can be enhanced.

Description

Uplink data transmission method, device and system

technical field

The present invention relates to wireless communication technology, in particular to a method, device and system for sending uplink data.

Background technique

With the development of wireless communication technology, the 3rd Generation mobile communication system (the 3rd Generation, 3G) has been gradually popularized. Facing the challenges brought by the growing demand for high-speed data services, the mobile communication system needs to quickly adapt to the next generation cellular mobile network. Evolution, and gradually develop into a Long Term Evolution (Long Term Evolution, LTE) system.

Taking the LTE system as an example, the problem of unbalanced uplink and downlink coverage common in various mobile communication systems is explained.

LTE systems are generally constructed based on the existing Global System for Mobile communications (GSM) and/or Universal Mobile Telecommunications System (UMTS). After analyzing and comparing various wireless channels in the LTE system The study found that the LTE uplink data service channel is the channel with the most limited coverage.

Through simulation analysis and research, the coverage of uplink data services is very weakly affected by factors such as the number of different resource blocks (Resource Blocks, RBs) allocated, and the main factor limiting uplink coverage is the maximum power allocated for uplink, that is, when a certain Under the premise of the service rate, the maximum uplink coverage distance is most severely restricted by the uplink maximum transmit power.

Theoretically, uplink coverage can be improved by increasing the maximum transmit power of the terminal, in order to achieve balanced coverage of uplink and downlink, data services and control signaling. However, increasing the power will greatly consume the energy consumption of the terminal. Due to limiting factors such as the physical size of the terminal and battery capacity, improving the coverage by increasing the maximum transmit power is severely restricted, and increasing the power will also cause a huge loss of neighbors. Area interference will reduce the coverage and capacity of the system accordingly. In the prior art, the hybrid automatic repeat request (HARQ) technology and uplink frequency hopping technology can be used to slightly improve the coverage of uplink data services, but the effect is not significant.

Due to the limitation of terminal energy consumption, in all mobile communication systems, the downlink transmission of the base station generally has a large coverage area, while the coverage area of the uplink transmission of the base station is much smaller than that of the downlink transmission, resulting in the problem of unbalanced uplink and downlink coverage. The signal to interference plus noise ratio (Signal to Interference plus Noise Ratio, SINR) of the received uplink data decreases, resulting in a decrease in the accuracy of the base station to demodulate the uplink data.

Contents of the invention

Aiming at the defects in the prior art, the embodiments of the present invention provide a method, device and system for sending uplink data.

An embodiment of the present invention provides a method for sending uplink data, including:

According to the received request information sent by the restricted mobile terminal with limited uplink transmission, return the response information for instructing it to perform uplink transmission to the restricted mobile terminal, and send the response information to the assisting mobile terminal in the idle state in the service area requests for assistance;

After receiving the acknowledgment assistance information returned by the assisting mobile terminal according to the assistance request and the uplink data sent by the restricted mobile terminal according to the response information, allocate uplink transmission resources and instruct the restricted mobile terminal to sending data on a first resource, instructing the assisting mobile terminal to capture data on the first resource and forward it using a second resource, wherein the first resource is orthogonal to the second resource;

The data received on the first resource and the second resource are respectively demodulated and then combined to obtain uplink data with enhanced signal strength.

The embodiment of the present invention also provides a method for sending uplink data, including:

If after detecting the received reference signals periodically sent by the base stations of the serving cell and neighboring cells, it is determined that it is a restricted mobile terminal, then sending request information for requesting assistance to the base station of the serving cell;

sending uplink data according to the response information returned by the base station indicating uplink transmission;

Sending uplink data according to the received indication information sent by the base station indicating to send data on the first resource.

The embodiment of the present invention also provides a method for sending uplink data, including:

Return confirmation assistance information according to the received assistance request sent by the base station;

receiving and forwarding the data according to the received indication information sent by the base station indicating that data is captured on the first resource and forwarded to the base station by using the second resource.

The embodiment of the present invention also provides a base station, including:

The first base station module is configured to return to the restricted mobile terminal response information for instructing it to perform uplink transmission according to the received request information sent by the restricted mobile terminal with restricted uplink transmission, and send the response information to the restricted mobile terminal in the service area An assisting mobile terminal in an idle state sends an assisting request;

The second base station module is configured to allocate uplink transmission resources after receiving the confirmation assistance information returned by the assisting mobile terminal according to the assistance request and the uplink data sent by the restricted mobile terminal according to the response information, Instructing the restricted mobile terminal to send data on the first resource, instructing the assisting mobile terminal to capture data on the first resource and forward it using a second resource, wherein the first resource and the second resource Orthogonal;

The third base station module is configured to respectively demodulate and combine the data received on the first resource and the second resource to obtain uplink data with enhanced signal strength.

The embodiment of the present invention also provides a restricted mobile terminal, including:

The first restricted terminal module is used to detect the received reference signal periodically sent by the base station of the serving cell and the adjacent cell, and after judging that it is a restricted mobile terminal, send the reference signal to the base station of the serving cell request information for requesting assistance;

The second restricted terminal module is configured to send uplink data according to the response information returned by the base station indicating uplink transmission;

The third restricted terminal module is configured to send uplink data according to the received instruction information sent by the base station indicating to send data on the first resource.

The embodiment of the present invention also provides an assisted mobile terminal, including:

The first assistance terminal module is configured to return confirmation assistance information according to the received assistance request sent by the base station;

The second assisting terminal module is configured to receive and forward the data according to the received indication information sent by the base station indicating that the data is captured on the first resource and forwarded to the base station by using the second resource.

An embodiment of the present invention also provides a communication system, including the above-mentioned base station, a restricted mobile terminal and an assisting mobile terminal.

In the embodiment of the present invention, after receiving the request sent by the restricted mobile terminal, the base station searches for a mobile terminal that can provide assistance in its service area as an assisting mobile terminal, and when the restricted mobile terminal sends its uplink data, the assisting mobile terminal Actively obtain the data sent by the restricted mobile terminal according to the instructions of the base station, and forward the obtained data to the base station, so that the base station can not only receive the uplink data sent by the restricted mobile terminal, but also receive data that assists the mobile terminal to forward of the uplink data. Therefore, the signal strength of the uplink data sent by the restricted mobile terminal received by the base station is enhanced, which can improve the SINR of the uplink data received by the base station, improve the accuracy of the demodulation of the uplink data by the base station, and help improve the performance of the restricted mobile terminal. The quality of uplink communication can effectively enhance the effect of uplink coverage, which is conducive to the balance of uplink and downlink coverage.

Description of drawings

FIG. 1 is a flowchart of an embodiment of a first method for sending uplink data in the present invention;

FIG. 2 is a flow chart of an embodiment of the second uplink data sending method of the present invention;

3 is a flowchart of another embodiment of the second uplink data sending method of the present invention;

FIG. 4 is a flow chart of an embodiment of a third uplink data sending method of the present invention;

5 is a flow chart of another embodiment of the third uplink data sending method of the present invention;

FIG. 6 is a schematic structural diagram of a base station embodiment of the present invention;

FIG. 7 is a schematic structural diagram of an embodiment of a restricted mobile terminal in the present invention;

FIG. 8 is a schematic structural diagram of an embodiment of assisting a mobile terminal in the present invention;

FIG. 9 is a schematic structural diagram of the communication system of the present invention.

Detailed ways

Fig. 1 is a flowchart of an embodiment of the first uplink data sending method of the present invention. As shown in Fig. 1, the method includes:

Step 100: According to the received request information sent by the restricted mobile terminal with restricted uplink transmission, return the response information for instructing the restricted mobile terminal to perform uplink transmission to the restricted mobile terminal, and send assistance to the idle state in the service area The mobile terminal sends an assistance request;

The base station performs normal data communication with the mobile terminals in its service area. Due to the limitation of the performance of the mobile terminal equipment and considering the interference of adjacent cells, its uplink transmission power will be limited within a certain range, resulting in the uplink coverage of the base station being less than Downlink coverage, for a mobile terminal, when it moves to an area where the downlink coverage is larger than the uplink coverage, the uplink transmission will be limited and become a restricted mobile terminal. For a limited mobile terminal with limited uplink transmission, the SINR of the uplink data received by the base station will decrease, and the accuracy rate of the base station to demodulate the uplink data will decrease.

In the embodiment of the present invention, when the mobile terminal needs to send uplink data to the base station, but the uplink transmission is limited, the mobile terminal requests the base station to provide assistance for its uplink transmission by sending request information to the base station. Specifically, when the mobile terminal needs to send uplink data to the base station, it first needs to send random access preamble data to the base station to request access, so the request information can be the random access preamble data (preamble ), which is different from the prior art in that the preamble data adds Assisted Transmission Request (AssistantTransmission Request-eNodeB, ATR-NB) signaling requesting assistance from the base station. However, the form of the request information is not limited to this, and may also be a form including only ATR-NB signaling, and the random access preamble data is sent to the base station in a normal signaling form.

It should be noted that although the uplink transmission of the restricted mobile terminal is limited, when the base station demodulates non-essential communication content data such as preamble data and request information, due to the small amount of information of this part of data, the The transmission rate requirement is low, and the required demodulation level itself is low. Therefore, even if the uplink transmission is limited, the base station can correctly receive and demodulate the request initiated by the limited mobile terminal. For the actual communication content sent by the mobile terminal in the uplink data, this part of the data has a large amount of information and has certain requirements for the transmission rate. Correspondingly, the base station needs to adopt a higher demodulation level to ensure the data transmission rate; However, when a mobile terminal moves to an area with limited uplink coverage, that is, when it becomes a restricted mobile terminal, the SINR of the uplink data sent by the base station will decrease. In order to demodulate the uplink data normally, the base station needs to cooperate to reduce its resolution Adjust grade. When the base station lowers its demodulation level, it will affect the data transmission rate between the base station and the mobile terminal, and at the same time, it cannot guarantee that the uplink data can be correctly demodulated.

After receiving the request information sent by the restricted mobile terminal, the base station returns response information to the restricted mobile terminal to instruct the restricted mobile terminal to start uplink transmission. Specifically, the response information may be a random access response message returned by the base station to the mobile terminal, that is, in the form of a response message to the received random access preamble data sent by the mobile terminal. The access response message adds the assisted transmission request confirmation signaling for the ATR-NB response; the response message also carries the serial identity number (Identity, ID), timing advance, resource allocation information, etc. necessary for normal communication information for the restricted mobile terminal to perform uplink transmission according to the information. Correspondingly, after receiving the response information, the restricted mobile terminal sends its uplink data according to the instruction of the base station.

While returning response information to the restricted mobile terminal, the base station searches for a mobile terminal capable of providing assistance to the restricted mobile terminal in its service area as an assisting mobile terminal. The current service state of the assisting mobile terminal needs to be in an idle state, that is, no communication service is performed; and unlike ordinary mobile terminals in the prior art, the assisting mobile terminal needs to be able to capture data on resources specified by the base station, that is, The assisting mobile terminal not only has normal communication capabilities, can send and receive communication data with the base station, but also can actively obtain uplink data sent by other mobile terminals on designated resources according to the instructions of the base station.

If the communication system works in Time Division Duplexing (Time Division Duplexing, TDD) working mode, the mobile terminal sends and receives data on different uplink and downlink time slots. Data can be captured on the gap.

If the communication system works in the frequency division duplex (Frequency Division Duplexing, FDD) working mode, the mobile terminal sends and receives data on different uplink and downlink communication frequencies. It is possible not only to transmit data but also to receive data, and to use the downlink communication frequency to not only receive data but also to transmit data. That is to say, the assisting mobile terminal with the above capabilities can not only use the downlink communication frequency to forward the data received from the base station to other mobile terminals, but also use the uplink communication frequency to receive the uplink data sent by other mobile terminals and forward it to the base station , the mobile terminals can directly communicate with each other.

However, in order to reduce the load of the base station receiving communication signaling, the mobile terminal capable of capturing data on resources designated by the base station does not report the state information of its ability to the base station. Therefore, after the base station searches for an idle mobile terminal in its service area, it sends an assistance request to the found mobile terminal, requesting it to provide assistance for a limited mobile terminal with limited uplink transmission. Wherein, there may be one or more qualified assisting mobile terminals.

Step 101: After receiving the acknowledgment assistance information returned by the assisting mobile terminal according to the assistance request and the uplink data sent by the restricted mobile terminal according to the response information, allocate uplink transmission resources and indicate the restricted The mobile terminal sends data on the first resource, instructing the assisting mobile terminal to capture the data on the first resource and use the second resource to forward the data, wherein the first resource is orthogonal to the second resource.

After a mobile terminal in an idle state receives an assistance request sent by a base station, if the mobile terminal is an ordinary mobile terminal, that is, it does not have the ability to obtain data on the resource specified by the base station, then correspondingly, the mobile terminal receives the assistance request. After requesting, it is also impossible to give feedback to the base station; only a mobile terminal with this capability, after receiving the assistance request, can return confirmation assistance information to the base station, accept the base station's request, and become an assisting mobile terminal.

After receiving the assistance request sent by the base station, the assisting mobile terminal returns confirmation assistance information to the base station. After receiving the response information sent by the base station, the restricted mobile terminal sends its uplink data according to the instructions of the base station.

It should be noted that although the restricted mobile terminal has limited uplink transmission, it still needs to send its uplink data after receiving the response information, and the information contained in the uplink data is the same as that in the prior art. This operation step is performed because the uplink data sent by the mobile terminal to the base station this time will be used as the starting condition for the base station to allocate resources for the restricted mobile terminal and the assisting mobile terminal, that is, the base station receives the confirmation assistance information returned by the assisting mobile terminal, and Only after receiving the uplink data sent by the restricted mobile terminal, will it allocate its own communication resources and perform subsequent operations. Moreover, as in the prior art, the uplink data sent by the mobile terminal will carry the current state information of the mobile terminal, so that the base station can know the working state of the mobile terminal in time.

Wherein, the uplink data sent by the restricted mobile terminal before the base station allocates the first resource may be the same as or different from the uplink data sent on the first resource according to the instruction of the base station.

After receiving the acknowledgment and assistance information returned by the assisting mobile terminal and the uplink data returned by the restricted mobile terminal, the base station re-allocates resources, respectively assigning the restricted mobile terminal the first resource required for its uplink transmission. A resource is used to assist the mobile terminal in allocating the second resource it needs to use for uplink transmission, and the first resource and the second resource are orthogonal, that is, they do not interfere with each other; after the resources are allocated, the The restricted mobile terminal sends a communication command, instructing it to use the first resource to send its uplink data, and sends a communication command to the assisting mobile terminal, instructing it to actively acquire the data on the first resource, and use the second resource to transfer the acquired data forwarded to the base station.

Specifically, taking the LTE system as an example, the resources allocated by the base station to the mobile terminal are one or more continuous RBs, and one or more RBs allocated to the restricted mobile terminal and one or more RBs allocated to assist the mobile terminal Orthogonality in the time domain. When the embodiment of the present invention is applied to other communication systems, the communication transmission resources allocated to the restricted mobile terminal and the assisting mobile terminal also need to be mutually orthogonal to ensure that they do not interfere with each other during data transmission and reception.

It can be understood that, the above-mentioned first resource and second resource are only differences in the names of resources allocated to different mobile terminals, and have nothing to do with the sequence.

Step 102: Demodulate and combine the data received on the first resource and the second resource respectively, to obtain uplink data with enhanced signal strength.

The base station instructs the restricted mobile terminal to send data on the first resource; at the same time, instructs the mobile terminal to actively acquire the data on the first resource, and after forwarding the data to the base station on the second resource, receives the uplink data sent by the mobile terminal . The data received on the first resource and the second resource are respectively demodulated, and the respectively demodulated data are combined to obtain final uplink data.

The uplink data sent by the restricted mobile terminal not only reaches the base station through the space channel corresponding to the propagation path between it and the base station; it also first reaches the assisting mobile terminal through the space channel corresponding to the propagation path between the assisting mobile terminal and then through Assist the spatial channel corresponding to the propagation path between the mobile terminal and the base station to reach the base station. Therefore, the uplink data on the first resource and the second resource received by the base station are two channels of uplink data, and after combining the two channels of data signals, the signal strength thereof is enhanced compared with that of a single channel of data signals.

In the uplink data sending method provided by the embodiment of the present invention, after receiving the request sent by the restricted mobile terminal, the base station searches for a mobile terminal that can provide assistance in its service area as an assisting mobile terminal, and sends its uplink data to the restricted mobile terminal. , assist the mobile terminal to actively acquire the data sent by the restricted mobile terminal according to the instructions of the base station, and forward the acquired data to the base station, so that the base station can not only receive the uplink data sent by the restricted mobile terminal, but also receive to assist the mobile terminal in forwarding the uplink data. Therefore, the signal strength of the uplink data sent by the restricted mobile terminal received by the base station is enhanced, that is, the method in the embodiment of the present invention can improve the SINR of the uplink data received by the base station, improve the accuracy of the base station to demodulate the uplink data, and effectively It helps to improve the uplink communication quality of the restricted mobile terminal, and can effectively enhance the effect of uplink coverage, thereby facilitating the balance of uplink and downlink coverage.

Further, on the basis of the above embodiments, the restricted mobile terminal is within the trigger time, the reference signal receiving power (Reference Signal Receiving Power, RSRP) of the adjacent cell is greater than the maximum value of the preset offset range of the RSRP of the serving cell Value, or the mobile terminal whose Reference Signal Receiving Quality (RSRQ) of the neighboring cell is greater than the maximum value of the preset offset range of the RSRQ of the serving cell.

Specifically, the assistance for uplink transmission is carried out for restricted mobile terminals within the service area of the base station. Therefore, it is necessary to determine whether the mobile terminal is a restricted mobile terminal, that is, whether the uplink transmission is restricted. The embodiment of the present invention adopts the following judgment method .

Each base station periodically sends reference signals to mobile terminals in its service area. After receiving the reference signal, the mobile terminal detects the RSRP or RSRQ of its current serving cell and neighboring cells. If the value of RSRP or RSRQ of neighboring cells If the entry condition is met, it is judged that the mobile terminal is a restricted mobile terminal; if the entry condition is not satisfied, the mobile terminal is not a restricted mobile terminal, and communicates with the base station according to a normal communication process.

Taking the judgment by RSRP as an example, the conditions for the judgment will be described in detail.

Set Ms as the value of the RSRP of the serving cell received by the mobile terminal; Mn as the value of the RSRP of the adjacent cell received by the mobile terminal; off is a set threshold value, which is determined by network measurement , by setting off, Mn is not directly compared with the numerical value of Ms, but is compared with the numerical value of Ms+off, and off is an adjustment value, so that Ms can be reasonably reduced to a value suitable for comparison with Mn within the numerical range; hys is the offset of the off threshold within a certain range. Thus, a preset offset range is formed, that is, the maximum value of the offset range is Ms+off+hys, and the minimum value is Ms+off-hys.

If within the trigger time, the Mn of the mobile terminal is greater than Ms+off+hys, the entry condition is met, and the mobile terminal is judged to be a restricted mobile terminal. Wherein, the start time point of the trigger time is the moment when the mobile terminal receives the reference signal periodically sent by the base station, and the end time point after continuing for a preset time length in the system is the end time point of the trigger time.

Since there is a mathematical operation relationship between the RSRQ and the RSRP, it is the same when judging based on the RSRQ.

The uplink data sending method provided by the embodiment of the present invention uses the reference signal periodically sent by the base station to the mobile terminal as the judgment basis, and the mobile terminal judges whether it is Satisfies the entry condition, that is, whether it is a restricted mobile terminal with limited uplink coverage. If the mobile terminal judges that it is currently a restricted mobile terminal, when it needs to perform uplink data transmission, it requests the base station to assist in its uplink transmission, so as to improve the signal strength of the base station to receive its uplink data. The method provided by the embodiment of the present invention can actively initiate a request by the mobile terminal that needs to be assisted, so that with the assistance of the base station and the assisting mobile terminal, the quality of its uplink communication can be enhanced, and the reception of the base station can be effectively improved. The SINR of the uplink data can improve the accuracy of the demodulation of the uplink data by the base station, enhance the effect of the uplink coverage of the base station, and help the balance of the uplink and downlink coverage of the base station.

Further, on the basis of the above-mentioned embodiments, if the restricted mobile terminal is within the next trigger time, if the RSRP of the adjacent cell is smaller than the minimum value of the preset offset range of the RSRP of the serving cell, or the RSRP of the adjacent cell When the RSRQ is smaller than the minimum value of the preset offset range of the RSRQ of the serving cell, it switches to the state of an unrestricted mobile terminal.

Specifically, if the restricted mobile terminal detects that the value of RSRP or RSRQ of its neighboring cell satisfies the leaving condition within the next trigger time, it is determined that the restricted mobile terminal becomes an unrestricted mobile terminal, and the normal communication flow can be followed. Communicate with the base station; if the departure condition is not met, communicate with the base station according to the communication process of the restricted mobile terminal.

Taking judgment by RSRP as an example, the leaving conditions are described in detail.

If the Mn of the restricted mobile terminal is less than Ms+off-hys within the trigger time, the leaving condition is satisfied, and the restricted mobile terminal is judged to become an unrestricted mobile terminal. Only when the unrestricted mobile terminal satisfies the entry condition again will it become a restricted mobile terminal again.

Since there is a mathematical operation relationship between the RSRQ and the RSRP, it is the same when judging based on the RSRQ.

When a mobile terminal detects the RSRP or RSRQ of its serving cell and neighboring cells for the first time after starting up, if the entry condition is met, it is a restricted mobile terminal; if it does not meet the entry condition, it is not a restricted mobile terminal; In the case of other than detection, if the detection result neither meets the entry condition nor the exit condition, the state judged within the last trigger time remains unchanged.

In the uplink data sending method provided by the embodiment of the present invention, when judging whether a mobile terminal is a restricted mobile terminal, in addition to setting an entry condition, an exit condition is also set, that is, using the maximum value and the minimum value of the preset value range value as a judgment condition. A restricted mobile terminal that has met the entry condition will not be judged as an unrestricted mobile terminal immediately because it does not meet the entry condition within the next trigger time, but will be judged as an unrestricted mobile terminal only when it needs to meet the exit condition. Therefore, when the mobile terminal is located in a critical area with limited uplink coverage, using the method in the embodiment of the present invention can avoid the problem that the mobile terminal may switch between restricted and unrestricted states too frequently.

Further, on the basis of the foregoing embodiments, the assisting mobile terminal is an unrestricted mobile terminal.

Specifically, when a base station searches for an assisting mobile terminal that can provide assistance to a restricted mobile terminal within its service area, the mobile terminal that can provide assistance needs to be in an idle state and be able to capture data on the resources specified by the base station, and also needs to An unrestricted mobile terminal, that is, the mobile terminal does not meet the entry condition within the first trigger time; a mobile terminal that has met the exit condition, that is, an unrestricted mobile terminal, does not meet the entry condition within the latest trigger time, Or a mobile terminal that has met the entry condition, that is, a restricted mobile terminal, meets the exit condition within the latest trigger time.

In the uplink data sending method provided by the embodiment of the present invention, when the base station selects to assist the mobile terminal in its service area, the mobile terminal that can provide assistance needs to meet the requirements that it is currently in an idle state and has the ability to capture data on the resources specified by the base station. In addition to its capabilities, it also needs to meet the conditions that it is not a restricted mobile terminal. By selecting a mobile terminal that does not have uplink transmission restrictions to provide assistance to the restricted mobile terminal, it can effectively improve the SINR of the base station receiving the uplink data sent by the restricted mobile terminal, and improve the accuracy of the base station demodulating the uplink data, so that it is more effective It can greatly improve the uplink communication effect of the restricted mobile terminal, enhance the uplink coverage effect of the base station, and is more conducive to the balance of uplink and downlink coverage.

Further, on the basis of the foregoing embodiments, the assisting mobile terminal is located within a preset range between the restricted mobile terminal and the base station.

Specifically, when a base station searches for an assisting mobile terminal that can provide assistance to a restricted mobile terminal within its service area, the mobile terminal that can provide assistance needs to be located between the base station and the location of the restricted mobile terminal requesting assistance. , may be within a certain preset range between the base station and the location of the restricted mobile terminal.

Among them, the base station can obtain the location information of each mobile terminal in the service area through the Global Positioning System (Global Positioning System, GPS), or according to the information reported by the mobile terminal during normal communication with the base station.

In the uplink data sending method provided by the embodiment of the present invention, when the base station selects to assist the mobile terminal in its service area, the mobile terminal that can provide assistance must not only be in an idle state, have the ability to capture data on resources designated by the base station, In addition to not belonging to the restricted mobile terminal, it also needs to be located between the base station and the restricted mobile terminal. Selecting such an assisting mobile terminal can make the attenuation of the signal in the propagation path as small as possible when it receives and forwards data, that is, because the distance between the assisting mobile terminal and the base station and the restricted mobile terminal is limited within a certain range , it can ensure as much as possible the signal strength of the data forwarded by the assisting mobile terminal to the base station, so that the signal strength of the data sent by the assisting mobile terminal received by the base station can be ensured as much as possible. Therefore, it is more helpful to improve the uplink communication effect of the restricted mobile terminal, Improve the SINR of the uplink data received by the base station, improve the accuracy of the uplink data demodulation by the base station, improve the uplink coverage effect of the base station, and help the balance of the uplink and downlink coverage of the base station.

Fig. 2 is a flowchart of an embodiment of the second uplink data sending method of the present invention. As shown in Fig. 2, the method includes:

Step 200: After detecting the received reference signals periodically sent by the base stations of the serving cell and neighboring cells, and judging that it is a restricted mobile terminal, send a request for assistance to the base station of the serving cell request information.

Each base station periodically sends a reference signal to the mobile terminal in its service area, and the mobile terminal compares the received signal strength of the reference signal sent by the base station of its current serving cell with the signal strength of the reference signal sent by the base station of the adjacent cell. By comparison, it is judged whether there is a restriction when performing uplink data transmission with the base station of the current serving cell. If so, it is judged that its current state is a restricted mobile terminal, and it is necessary to request the base station to assist in its uplink transmission.

When the mobile terminal needs to send uplink data to the base station, but the uplink transmission is limited, the mobile terminal requests the base station to provide assistance in its uplink transmission by sending request information to the base station. Specifically, when the mobile terminal needs to send uplink data to the base station, it needs to first send random access preamble data to the base station to request access, so the request information can be in the form of random access preamble data sent by the restricted mobile terminal to the base station , the difference from the prior art is that ATR-NB signaling is added to the preamble data. However, the form of the request information is not limited to this, and may also be a form including only ATR-NB signaling, and the random access preamble data is sent to the base station in a normal signaling form.

Step 201: Send uplink data according to the response information indicating uplink transmission returned by the base station.

After receiving the request information sent by the restricted mobile terminal, the base station correspondingly returns response information to instruct the restricted mobile terminal to start uplink transmission. Specifically, the response information may be a random access response message returned by the base station to the mobile terminal, which is different from the prior art in that the random access response message adds an assisted transmission request confirmation signaling for responding to the ATR-NB; The response information also carries information necessary for normal communication such as sequence ID, timing advance, resource allocation information, etc., for the restricted mobile terminal to perform uplink transmission according to the information. After receiving the response information, the restricted mobile terminal sends its uplink data according to the instructions of the base station.

After receiving the request information sent by the restricted mobile terminal, the base station returns a response message to it, and at the same time searches for an assisting mobile terminal in its service area that can provide assistance, and sends an assistance message to the searched mobile terminal that can provide assistance. ask.

Step 202: Send uplink data according to the received indication information from the base station indicating to send data on the first resource.

After the restricted mobile terminal sends its uplink data to the base station according to the response information sent by the base station. After the base station receives the uplink data returned by the restricted mobile terminal according to the response information, and receives the confirmation assistance information returned by the assisting mobile terminal according to the assistance request, it re-allocates the transmission resources. The base station allocates the first resource for the restricted mobile terminal After providing it with uplink transmission, sending instruction information to the restricted mobile terminal, instructing it to send data on the first resource, and correspondingly, the restricted mobile terminal sends its uplink data according to the instruction of the base station.

It should be noted that when the restricted mobile terminal executes step 201 and step 202, the uplink data sent respectively may be the same or different.

In the uplink data sending method provided by the embodiment of the present invention, when the mobile terminal judges that its own uplink transmission is limited and needs to perform uplink transmission, it actively initiates a request to the base station to request the base station for assistance based on uplink transmission, and according to the base station Instructions to send uplink data on the allocated resources. By adopting the method provided by the embodiment of the present invention, the limited mobile terminal is only assisted, and the impact on other mobile terminals in the communication system is small, and the limited mobile terminal can send uplink data correspondingly according to the instruction sent by the base station, and the assisted operation The completion by the base station and the assisting mobile terminal will not have higher requirements on the configuration of the restricted mobile terminal, nor will it affect the performance of the restricted mobile terminal. Under the premise of not affecting the communication of the restricted mobile terminal, through the cooperation of the base station and the assisting mobile terminal, the SINR of the received uplink data of the restricted mobile terminal can be effectively improved on the base station side, and the accuracy of the demodulation of the uplink data by the base station can be improved. The efficiency can effectively improve the uplink coverage effect of the base station, which is conducive to the balance of the uplink and downlink coverage of the base station.

Further, on the basis of the above-mentioned embodiments, the restricted mobile terminal is that within the trigger time, the RSRP of the adjacent cell is greater than the maximum value of the preset offset range of the RSRP of the serving cell, or the RSRQ of the adjacent cell is greater than The mobile terminal with the maximum value of the preset offset range of the RSRQ of the serving cell.

After receiving the reference signals sent by the base stations of its serving cell and neighboring cells, the mobile terminal detects the RSRP or RSRQ of the reference signals sent by the base stations of the serving cell and the RSRP or RSRQ of the reference signals sent by the base stations of neighboring cells. . If the value of RSRP or RSRQ of the adjacent cell satisfies the entry condition, it is judged that the mobile terminal is a restricted mobile terminal; communication.

Taking the judgment by RSRP as an example, the conditions for the judgment will be described in detail.

Set Ms as the value of the RSRP of the serving cell received by the mobile terminal; Mn as the value of the RSRP of the adjacent cell received by the mobile terminal; off is a set threshold value, which is determined by network measurement , by setting off, Mn is not directly compared with the numerical value of Ms, but is compared with the numerical value of Ms+off, and off is an adjustment value, so that Ms can be reasonably reduced to a value suitable for comparison with Mn within the numerical range; hys is the offset of the off threshold within a certain range. Thus, a preset offset range is formed, that is, the maximum value of the offset range is Ms+off+hys, and the minimum value is Ms+off-hys.

If within the trigger time, the Mn of the mobile terminal is greater than Ms+off+hys, the entry condition is met, and the mobile terminal is judged to be a restricted mobile terminal. Wherein, the start time point of the trigger time is the moment when the mobile terminal receives the reference signal periodically sent by the base station, and the end time point after continuing for a preset time length in the system is the end time point of the trigger time.

Since there is a mathematical operation relationship between the RSRQ and the RSRP, it is the same when judging based on the RSRQ.

The uplink data sending method provided by the embodiment of the present invention uses the reference signal periodically sent by the base station to the mobile terminal as the judgment basis, and the mobile terminal judges whether it is Satisfies the entry condition, that is, whether it is a restricted mobile terminal with limited uplink coverage. If the mobile terminal judges that it is currently a restricted mobile terminal, when it needs to perform uplink data transmission, it requests the base station to assist in its uplink transmission, so as to improve the signal strength of the base station to receive its uplink data. The method provided by the embodiment of the present invention can actively initiate a request by the mobile terminal that needs to be assisted, so that with the assistance of the base station and the assisting mobile terminal, the quality of its uplink communication can be enhanced, and the reception of the base station can be effectively improved. The SINR of the uplink data can improve the accuracy of the demodulation of uplink data by the base station, enhance the effect of uplink coverage, and help the balance of the uplink and downlink coverage of the base station.

Further, on the basis of the above-mentioned embodiments, if the restricted mobile terminal is within the next trigger time, if the RSRP of the adjacent cell is smaller than the minimum value of the preset offset range of the RSRP of the serving cell, or the RSRP of the adjacent cell When the RSRQ is smaller than the minimum value of the preset offset range of the RSRQ of the serving cell, it switches to the state of an unrestricted mobile terminal.

Specifically, if the restricted mobile terminal detects that the value of RSRP or RSRQ of its neighboring cell satisfies the leaving condition within the next trigger time, it is determined that the restricted mobile terminal becomes an unrestricted mobile terminal, and the normal communication flow can be followed. Communicate with the base station; if the departure condition is not met, communicate with the base station according to the communication process of the restricted mobile terminal.

Taking judgment by RSRP as an example, the leaving conditions are described in detail.

If the Mn of the restricted mobile terminal is less than Ms+off-hys within the trigger time, the leaving condition is satisfied, and the restricted mobile terminal is judged to become an unrestricted mobile terminal. Only when the unrestricted mobile terminal satisfies the entry condition again will it become a restricted mobile terminal again.

Since there is a mathematical operation relationship between the RSRQ and the RSRP, it is the same when judging based on the RSRQ.

When a mobile terminal detects the RSRP or RSRQ of its serving cell and neighboring cells for the first time after starting up, if the entry condition is met, it is a restricted mobile terminal; if it does not meet the entry condition, it is not a restricted mobile terminal; In the case of other than detection, if the detection result neither meets the entry condition nor the exit condition, the state judged within the last trigger time remains unchanged.

In the uplink data sending method provided by the embodiment of the present invention, when judging whether a mobile terminal is a restricted mobile terminal, in addition to setting an entry condition, an exit condition is also set, that is, using the maximum value and the minimum value of the preset value range value as a judgment condition. A restricted mobile terminal that has met the entry condition will not be judged as an unrestricted mobile terminal immediately because it does not meet the entry condition within the next trigger time, but will be judged as an unrestricted mobile terminal only when it needs to meet the exit condition. Therefore, when the mobile terminal is located in a critical area with limited uplink coverage, using the method in the embodiment of the present invention avoids the problem that the mobile terminal may switch between restricted and unrestricted states too frequently.

FIG. 3 is a flow chart of another embodiment of the second uplink data sending method of the present invention. As shown in FIG. 3, after step 202, the method further includes:

Step 300: If it is currently in an idle state and data can be captured on the resources specified by the base station, return confirmation assistance information according to the received assistance request sent by the base station.

When the mobile terminal needs to send uplink data to the base station, but the uplink transmission is limited, the mobile terminal will send a request message to the base station, requesting the base station to provide assistance for its uplink transmission; after receiving the request message, the base station will Search for mobile terminals that are currently idle, that is, not performing communication services, within their service areas.

When the base station chooses to assist the mobile terminal, it sends an assistance request to the idle mobile terminal in its service area, but the mobile terminal with the ability to capture data on the resources designated by the base station will give feedback to the base station. Therefore, even if the mobile terminal is judged as a restricted mobile terminal within the latest trigger time, but it has not transmitted uplink data, that is, it is currently idle and can capture data on the resource specified by the base station, it can also be used as an assistance mobile terminal. In such a case, if the restricted mobile terminal receives an assistance request sent by the base station, requesting it to provide assistance for other restricted movements within the service area of the base station, it will correspondingly return confirmation assistance information to the base station.

Step 301: Receive and forward data according to the received indication information sent by the base station indicating that data is captured on the first resource and forwarded to the base station by using the second resource.

After receiving the acknowledgment assistance information and the uplink data sent by the restricted mobile terminal requesting assistance from the base station, the base station will allocate resources for uplink transmission to the mobile terminal requesting assistance and the mobile terminal providing assistance respectively.

Correspondingly, according to the instructions of the base station, the mobile terminal that provides assistance, that is, the limited mobile terminal that provides assistance in this embodiment, actively obtains data on the first resource, and uses the second resource allocated by the base station to obtain data The received data is forwarded to the base station.

In the uplink data sending method provided by the embodiment of the present invention, when the mobile terminal determines that its own uplink transmission is limited, if it is not currently performing communication services and has the ability to obtain data on resources designated by the base station, then the same Can become an assisting mobile terminal. With the assistance of the assisting mobile terminal, even with the assistance of a limited mobile terminal with assistance capabilities, the SINR of the uplink data received by the base station is also enhanced, and the accuracy of the demodulation of the uplink data by the base station is improved, which is beneficial to the uplink of the base station The coverage effect is improved, and it is conducive to the balance of the uplink and downlink coverage of the base station.

Further, on the basis of the above embodiments, the above step 301 may also be:

According to the received instruction information sent by the base station indicating to capture data on the first resource and use the second resource to forward to the base station, after amplifying the data captured on the first resource, using the The second resource is forwarded to the base station.

Specifically, the mobile terminal that provides assistance, that is, the limited mobile terminal that provides assistance in this embodiment, according to the instructions of the base station, when receiving and forwarding data, amplifies the signal strength of the data obtained on the first resource Afterwards, the second resource is used to forward the data with the amplified signal strength to the base station.

In the uplink data sending method provided by the embodiment of the present invention, the mobile terminal that provides assistance obtains the data according to the instructions of the base station, and then forwards the data to the base station after amplifying the signal strength of the data, which is more conducive to improving the data received by the base station. The SINR of uplink data improves the accuracy of base station demodulation of uplink data, which is conducive to improving the effect of uplink coverage of base stations, and is conducive to the balance of uplink and downlink coverage of base stations.

Fig. 4 is a flow chart of an embodiment of the third uplink data sending method of the present invention. As shown in Fig. 4, the method includes:

Step 401: Return confirming assistance information according to the received assistance request sent by the base station.

In the embodiment of the present invention, a mobile terminal that is currently in an idle state, that is, does not perform communication services, and has the ability to capture data on resources designated by the base station, can provide uplink transmission assistance for limited mobile terminals that need to perform uplink data transmission, so as to enhance The base station receives the signal strength of the uplink data sent by the restricted mobile terminal.

When a mobile terminal in the service area of the base station sends request information to it, the base station will correspondingly search for a mobile terminal meeting the above conditions in its service area as an assisting mobile terminal. Therefore, the assisting mobile terminal selected by the base station will receive the assistance request sent by the base station, and return confirmation assistance information to the base station according to the assistance request.

Step 402: Receive and forward the data according to the received indication information sent by the base station indicating that the data is captured on the first resource and forwarded to the base station by using the second resource.

After receiving the acknowledgment assistance information and the uplink data sent by the restricted mobile terminal requesting assistance from the base station, the base station will allocate resources for uplink transmission to the mobile terminal requesting assistance and the mobile terminal providing assistance respectively.

Correspondingly, according to the instructions of the base station, the mobile terminal is assisted in actively acquiring data on the first resource, and uses the second resource allocated by the base station to forward the acquired data to the base station.

The uplink data sending method provided by the embodiment of the present invention can effectively improve the SINR of the uplink data received by the base station and improve the uplink coverage of the base station by actively acquiring data according to the instruction sent by the base station after receiving the instruction sent by the base station, and forwarding it to the base station. The effect is conducive to the balance of the uplink and downlink coverage of the base station.

Further, on the basis of the foregoing embodiments, the foregoing step 402 may also be:

According to the received indication information sent by the base station indicating to capture data on the first resource and use the second resource to forward to the base station, after performing signal strength amplification on the data captured on the first resource, using The second resource is forwarded to the base station.

Specifically, the mobile terminal that provides assistance, that is, the limited mobile terminal that provides assistance in this embodiment, according to the instructions of the base station, when receiving and forwarding data, amplifies the signal strength of the data obtained on the first resource Afterwards, the second resource is used to forward the data with the amplified signal strength to the base station.

In the uplink data sending method provided by the embodiment of the present invention, the mobile terminal that provides assistance obtains the data according to the instructions of the base station, and then forwards the data to the base station after amplifying the signal strength of the data, which is more conducive to improving the data received by the base station. The SINR of uplink data improves the accuracy of base station demodulation of uplink data, which is conducive to improving the effect of uplink coverage of base stations, and is conducive to the balance of uplink and downlink coverage of base stations.

FIG. 5 is a flow chart of another embodiment of the third uplink data sending method of the present invention. As shown in FIG. 4 , before performing step 401, the method further includes:

Step 400: Detect the received reference signals periodically sent by the base stations of the serving cell and neighboring cells, and report the detection result to the base station of the serving cell, the detection result including whether it belongs to a restricted mobile terminal.

Each base station periodically sends a reference signal to the mobile terminal in its service area, and the mobile terminal compares the received signal strength of the reference signal sent by the base station of its current serving cell with the signal strength of the reference signal sent by the base station of the adjacent cell. Detect and compare to determine whether there is a restricted situation when performing uplink data transmission with the base station of the current serving cell. If so, judge that its current state is a restricted mobile terminal; if not, judge that its current state is not a restricted mobile terminal terminal. After the detection is completed, the detection result of whether the mobile terminal is a restricted mobile terminal is reported to the base station of the serving cell.

Because the base station periodically sends a reference signal for detection to the mobile terminal, correspondingly, the mobile terminal periodically detects whether it belongs to the state of a restricted mobile terminal, and reports the result to the base station after the detection is completed, Therefore, the base station can periodically learn the working status of each mobile terminal in its service area. So that when the base station selects the assisting mobile terminal, it can know whether the mobile terminal served by it is in an idle state or whether it is a restricted mobile terminal, so as to select a qualified assisting mobile terminal to provide uplink transmission assistance for the restricted mobile terminal.

It can be understood that, in order to ensure normal communication between the base station and the mobile terminal, and for the base station to know information such as the working status of the mobile terminal in its service area in a timely manner, such as whether it is currently in an idle business state and its location information, the mobile terminal will periodically report to the base station Report its status information. In this embodiment, the detection result of whether the mobile terminal is a restricted mobile terminal is reported to the base station, and its implementation is consistent with the implementation of the mobile terminal reporting other state information to the base station.

In the uplink data sending method provided by the embodiment of the present invention, the mobile terminal periodically reports to the base station according to the periodically obtained inspection results of whether there is an uplink transmission limitation, so that the base station can know the mobile terminal's status in its service area in time The working state is conducive to providing assistance to the restricted mobile terminal, and is conducive to its selection of the assisting mobile terminal in the service area.

Further, on the basis of the above-mentioned embodiments, the restricted mobile terminal is that within the trigger time, the RSRP of the adjacent cell is greater than the maximum value of the preset offset range of the RSRP of the serving cell, or the RSRQ of the adjacent cell is greater than the maximum value of the serving cell. The maximum value of the preset offset range of the RSRQ of the cell for the mobile terminal.

After receiving the reference signals sent by the base stations of its serving cell and neighboring cells, the mobile terminal detects the RSRP or RSRQ of the reference signals sent by the base stations of the serving cell and the RSRP or RSRQ of the reference signals sent by the base stations of neighboring cells. . If the value of RSRP or RSRQ of the adjacent cell satisfies the entry condition, it is judged that the mobile terminal is a restricted mobile terminal; communication.

Taking the judgment by RSRP as an example, the conditions for the judgment will be described in detail.

Set Ms as the value of the RSRP of the serving cell received by the mobile terminal; Mn as the value of the RSRP of the adjacent cell received by the mobile terminal; off is a set threshold value, which is determined by network measurement , by setting off, Mn is not directly compared with the numerical value of Ms, but is compared with the numerical value of Ms+off, and off is an adjustment value, so that Ms can be reasonably reduced to a value suitable for comparison with Mn within the numerical range; hys is the offset of the off threshold within a certain range. Thus, a preset offset range is formed, that is, the maximum value of the offset range is Ms+off+hys, and the minimum value is Ms+off-hys.

If within the trigger time, the Mn of the mobile terminal is greater than Ms+off+hys, the entry condition is met, and the mobile terminal is judged to be a restricted mobile terminal. Wherein, the start time point of the trigger time is the moment when the mobile terminal receives the reference signal periodically sent by the base station, and the end time point after continuing for a preset time length in the system is the end time point of the trigger time.

Since there is a mathematical operation relationship between the RSRQ and the RSRP, it is the same when judging based on the RSRQ.

When the mobile terminal that provides assistance for the restricted mobile terminal, that is, the assisting mobile terminal, becomes a restricted mobile terminal due to the movement of its location, its communication method is the same as the method of requesting uplink data enhancement described in the above-mentioned embodiment, here I won't repeat them here.

The uplink data transmission method provided by the present invention uses the reference signal periodically sent by the base station to the mobile terminal as the basis for judging, and the mobile terminal judges whether it satisfies the requirements for access according to the received signal strengths of the reference signals of its current serving cell and neighboring cells. Conditions, that is, whether it is a restricted mobile terminal with limited uplink coverage. If the mobile terminal judges that it is currently a restricted mobile terminal, when it needs to perform uplink data transmission, it requests the base station to assist in its uplink transmission, so as to improve the signal strength of the base station to receive its uplink data. The method provided by the embodiment of the present invention can actively initiate a request by the mobile terminal that needs to be assisted, so that with the assistance of the base station and the assisting mobile terminal, the quality of its uplink communication can be enhanced, and the reception of the base station can be effectively improved. The SINR of the uplink data can improve the accuracy of the demodulation of uplink data by the base station, enhance the effect of uplink coverage, and help the balance of the uplink and downlink coverage of the base station.

Further, on the basis of the above-mentioned embodiments, if the restricted mobile terminal is within the next trigger time, if the RSRP of the adjacent cell is smaller than the minimum value of the preset offset range of the RSRP of the serving cell, or the RSRP of the adjacent cell When the RSRQ is smaller than the minimum value of the preset offset range of the RSRQ of the serving cell, it switches to the state of an unrestricted mobile terminal.

Specifically, if the restricted mobile terminal detects that the value of RSRP or RSRQ of its neighboring cell satisfies the leaving condition within the next trigger time, it is determined that the restricted mobile terminal becomes an unrestricted mobile terminal, and the normal communication flow can be followed. Communicate with the base station; if the departure condition is not met, communicate with the base station according to the communication process of the restricted mobile terminal.

Taking judgment by RSRP as an example, the leaving conditions are described in detail.

If the Mn of the restricted mobile terminal is less than Ms+off-hys within the trigger time, the leaving condition is satisfied, and the restricted mobile terminal is judged to become an unrestricted mobile terminal. Only when the unrestricted mobile terminal satisfies the entry condition again will it become a restricted mobile terminal again.

Since there is a mathematical operation relationship between the RSRQ and the RSRP, it is the same when judging based on the RSRQ.

When a mobile terminal detects the RSRP or RSRQ of its serving cell and neighboring cells for the first time after starting up, if the entry condition is met, it is a restricted mobile terminal; if it does not meet the entry condition, it is not a restricted mobile terminal; In the case of other than detection, if the detection result neither meets the entry condition nor the exit condition, the state judged within the last trigger time remains unchanged.

In the uplink data sending method provided by the embodiment of the present invention, when judging whether a mobile terminal is a restricted mobile terminal, in addition to setting an entry condition, an exit condition is also set, that is, using the maximum value and the minimum value of the preset value range value as a judgment condition. A restricted mobile terminal that has met the entry condition will not be judged as an unrestricted mobile terminal immediately because it does not meet the entry condition within the next trigger time, but will be judged as an unrestricted mobile terminal only when it needs to meet the exit condition. Therefore, when the mobile terminal is located in a critical area with limited uplink coverage, using the method in the embodiment of the present invention avoids the problem that the mobile terminal may switch between restricted and unrestricted states too frequently.

It can be understood that each embodiment of the present invention is implemented in combination with uplink resource scheduling and a Hybrid Automatic Repeat Request (HARQ) mechanism, and the method is the same as the application method involved in the normal communication process.

Those of ordinary skill in the art can understand that all or part of the steps for implementing the above method embodiments can be completed by program instructions and related hardware. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps including the above-mentioned method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other various media that can store program codes.

FIG. 6 is a schematic structural diagram of an embodiment of a base station according to the present invention. As shown in FIG. 6 , the base station includes a first base station module 11 , a second base station module 12 and a third base station module 13 .

Wherein, the first base station module 11 is used to return to the restricted mobile terminal the response information for instructing it to perform uplink transmission according to the received request information sent by the restricted mobile terminal with restricted uplink transmission, and send the response information to the service area An assisting mobile terminal in an idle state sends an assistance request; the second base station module 12 is configured to receive confirmation assistance information returned by the assisting mobile terminal according to the assistance request, and send an assistance request to the restricted mobile terminal according to the response information. After receiving the uplink data, allocate uplink transmission resources, instruct the restricted mobile terminal to send data on the first resource, instruct the assisting mobile terminal to capture data on the first resource and forward it using the second resource, Wherein the first resource is orthogonal to the second resource; the third base station module 13 is used to respectively demodulate and combine the data received on the first resource and the second resource to obtain signal strength enhancement subsequent uplink data.

Further, on the basis of the above-mentioned embodiments, the restricted mobile terminal includes within the trigger time, the reference signal received power RSRP of the adjacent cell is greater than the maximum value of the preset offset range of the RSRP of the serving cell, or the adjacent cell A mobile terminal whose reference signal reception quality RSRQ of the cell is greater than the maximum value of the preset offset range of the RSRQ of the serving cell.

Further, on the basis of the above-mentioned embodiments, if the restricted mobile terminal is within the next trigger time, if the RSRP of the adjacent cell is smaller than the minimum value of the preset offset range of the RSRP of the serving cell, or the RSRP of the adjacent cell When the RSRQ is smaller than the minimum value of the preset offset range of the RSRQ of the serving cell, it switches to the state of an unrestricted mobile terminal.

Further, on the basis of the foregoing embodiments, the assisting mobile terminal is an unrestricted mobile terminal.

Further, on the basis of the foregoing embodiments, the assisting mobile terminal is located within a preset range between the restricted mobile terminal and the base station.

Specifically, for the method for transmitting uplink data by the base station provided in the embodiment of the present invention, reference may be made to the processing steps described in the corresponding method embodiment above, and details are not repeated here.

The base station provided by the embodiment of the present invention, after receiving the request sent by the restricted mobile terminal, searches for a mobile terminal that can provide assistance in its service area as an assisting mobile terminal, and assists the mobile terminal when the restricted mobile terminal sends its uplink data. The terminal actively obtains the data sent by the restricted mobile terminal according to the instructions of the base station, and forwards the obtained data to the base station, so that the base station can not only receive the uplink data sent by the restricted mobile terminal, but also receive the data sent by the assisted mobile terminal. The forwarded uplink data. Therefore, the signal strength of the uplink data sent by the restricted mobile terminal received by the base station is enhanced, which can improve the SINR of the uplink data received by the base station, improve the accuracy of the demodulation of the uplink data by the base station, and help improve the performance of the restricted mobile terminal. The quality of uplink communication can effectively enhance the effect of uplink coverage, which is conducive to the balance of uplink and downlink coverage.

FIG. 7 is a schematic structural diagram of an embodiment of a restricted mobile terminal in the present invention. As shown in FIG. 7, the restricted mobile terminal includes a first restricted terminal module 21, a second restricted terminal module 22 and a third restricted terminal module 23 .

Among them, the first restricted terminal module 21 is used to detect the received reference signal periodically sent by the base station of the serving cell and the adjacent cell, and after judging that it is a restricted mobile terminal, send a message to the base station of the serving cell Send request information for requesting assistance; the second restricted terminal module 22 is used to send uplink data according to the response information returned by the base station indicating uplink transmission; the third restricted terminal module 23 is used to send uplink data according to the received The instruction information sent by the base station, indicating to send data on the first resource, is to send uplink data.

Further, on the basis of the above embodiments, the restricted mobile terminal includes that within the trigger time, the RSRP of the adjacent cell is greater than the maximum value of the preset offset range of the RSRP of the serving cell, or the RSRQ of the adjacent cell is greater than The mobile terminal with the maximum value of the preset offset range of the RSRQ of the serving cell.

Further, on the basis of the above-mentioned embodiments, if the restricted mobile terminal is within the next trigger time, if the RSRP of the adjacent cell is smaller than the minimum value of the preset offset range of the RSRP of the serving cell, or the RSRP of the adjacent cell When the RSRQ is smaller than the minimum value of the preset offset range of the RSRQ of the serving cell, it switches to the state of an unrestricted mobile terminal.

Further, on the basis of the foregoing embodiments, the restricted mobile terminal further includes a fourth restricted terminal module 24 and a fifth restricted terminal module 25 .

Among them, the fourth restricted terminal module 24 is used to return confirmation assistance information according to the received assistance request sent by the base station when it is currently in an idle state and can capture data on resources designated by the base station; the fifth restricted terminal module The module 25 is configured to receive and forward the data according to the received indication information sent by the base station indicating that the data is captured on the first resource and forwarded to the base station by using the second resource.

Further, on the basis of the above-mentioned embodiments, the fifth restricted terminal module 25 is also configured to capture data on the first resource according to the received instruction sent by the base station and use the second resource to forward it to The instruction information of the base station is forwarded to the base station by using the second resource after amplifying the signal strength of the data captured on the first resource.

Specifically, for the method for sending uplink data by a restricted mobile terminal provided in the embodiment of the present invention, reference may be made to the processing steps described in the corresponding method embodiment above, and details are not repeated here.

The limited mobile terminal provided by the embodiment of the present invention actively initiates a request to the base station for assistance based on uplink transmission when the mobile terminal judges that its own uplink transmission is limited and needs to perform uplink transmission, and according to the base station Instructions to send uplink data on the allocated resources. By adopting the method provided by the embodiment of the present invention, the limited mobile terminal is only assisted, and the impact on other mobile terminals in the communication system is small, and the limited mobile terminal can send uplink data correspondingly according to the instruction sent by the base station, and the assisted operation The completion by the base station and the assisting mobile terminal will not have higher requirements on the configuration of the restricted mobile terminal, nor will it affect the performance of the restricted mobile terminal. At the same time, the restricted mobile terminal in the idle state can also serve as an assisting mobile terminal, providing assistance for other restricted mobile terminals in uplink transmission. Under the premise of not affecting the communication of the restricted mobile terminal, through the cooperation of the base station and the assisting mobile terminal, the SINR of the received uplink data of the restricted mobile terminal can be effectively improved on the base station side, and the accuracy of the demodulation of the uplink data by the base station can be improved. The efficiency can effectively improve the uplink coverage effect of the base station, which is conducive to the balance of the uplink and downlink coverage of the base station.

FIG. 8 is a schematic structural diagram of an embodiment of an assisting mobile terminal in the present invention. As shown in FIG. 8 , the assisting mobile terminal includes a first assisting terminal module 31 and a second assisting terminal module 32 .

Wherein, the first assisting terminal module 31 is used to return confirmation assistance information according to the received assistance request sent by the base station; Data is captured on one resource and forwarded to the base station by using the second resource to receive and forward the data.

Further, on the basis of the above-mentioned embodiments, the second assisting terminal module 32 is also configured to, according to the received information sent by the base station indicating that data is captured on the first resource and forwarded to the base station using the second resource The instruction information is forwarded to the base station by using the second resource after amplifying the signal strength of the data captured on the first resource.

Further, on the basis of the foregoing embodiments, the assisted mobile terminal further includes a third assisted terminal module 33 . The third assisting terminal module 33 is used to detect the received reference signal periodically sent by the base station of the serving cell and the adjacent cell, and report the detection result to the base station of the serving cell. Mobile terminal only.

Further, on the basis of the above-mentioned embodiments, the restricted mobile terminal includes within the trigger time, the RSRP of the neighboring cell is greater than the maximum value of the preset offset range of the RSRP of the serving cell, or the RSRQ of the neighboring cell A mobile terminal that is larger than the maximum value of the preset offset range of the RSRQ of the serving cell.

Further, on the basis of the above-mentioned embodiments, if the restricted mobile terminal is within the next trigger time, if the RSRP of the adjacent cell is smaller than the minimum value of the preset offset range of the RSRP of the serving cell, or the RSRP of the adjacent cell When the RSRQ is smaller than the minimum value of the preset offset range of the RSRQ of the serving cell, it switches to the state of an unrestricted mobile terminal.

Specifically, for the method for assisting the mobile terminal in sending uplink data provided by the embodiment of the present invention, reference may be made to the processing steps described in the corresponding method embodiment above, and details are not repeated here.

The assisted mobile terminal provided by the embodiment of the present invention can effectively improve the SINR of the uplink data received by the base station by actively acquiring data according to the instruction sent by the base station after receiving the instruction sent by the base station and forwarding it to the base station. The accuracy of the data improves the uplink coverage of the base station, which is conducive to the balance of the uplink and downlink coverage of the base station.

Fig. 9 is a schematic structural diagram of the communication system of the present invention. As shown in Fig. 9, the communication system includes the base station 1 described in any of the above embodiments, the restricted mobile terminal 2 described in any of the above embodiments, and the above implementation The at least one assisting mobile terminal 3 described in any of the examples, and the communication connection between the base station 1 , the restricted mobile terminal 2 and at least one assisting mobile terminal 3 .

Specifically, the base station 1 periodically sends reference signals to mobile terminals in its service area, and the mobile terminal judges whether there is a situation in which uplink transmission is limited according to the strengths of the reference signals received from the serving cell and neighboring cells. , then it becomes the restricted mobile terminal 2. When the restricted mobile terminal 2 needs to perform uplink data transmission, it sends a request message requesting assistance to the base station 1; after receiving the request message sent by the restricted mobile terminal 2, the base station 1 returns to it a response message instructing it to perform uplink data transmission, At the same time, select a qualified mobile terminal in its service area as the assisting mobile terminal 3, and send an assistance request to the assisting mobile terminal 3; after receiving the assistance request, the assisting mobile terminal 3 returns confirmation assistance information to the base station 1; After receiving the uplink data sent by the restricted mobile terminal 2, and receiving the confirmation assistance information returned by the assisting mobile terminal 3, reallocate the transmission resources, instruct the restricted mobile terminal 2 to send its uplink data on the first resource, and Instruct to assist the mobile terminal 3 to actively acquire the data on the first resource, and use the second resource to send the acquired data to the base station 1; the base station 1 demodulates the data received on the first resource and the second resource respectively and combines them , to obtain the enhanced uplink data.

The base station, restricted mobile terminal, and assisting mobile terminal involved in the communication system provided by the embodiments of the present invention can all use the base station, restricted mobile terminal, and assisting mobile terminal provided in the above embodiments, and will not be repeated here.

In the communication system provided by the embodiment of the present invention, after receiving the request sent by the restricted mobile terminal, the base station searches for a mobile terminal that can provide assistance in its service area as an assisting mobile terminal. When the restricted mobile terminal sends its uplink data, Assist the mobile terminal to actively acquire the data sent by the restricted mobile terminal according to the instructions of the base station, and forward the acquired data to the base station, so that the base station can not only receive the uplink data sent by the restricted mobile terminal, but also receive assistance The uplink data forwarded by the mobile terminal. Therefore, the signal strength of the uplink data sent by the restricted mobile terminal received by the base station is enhanced, which can improve the SINR of the uplink data received by the base station, improve the accuracy of the demodulation of the uplink data by the base station, and help improve the performance of the restricted mobile terminal. The quality of uplink communication can effectively enhance the effect of uplink coverage, which is conducive to the balance of uplink and downlink coverage.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (19)

1. An uplink data transmission method, comprising:

according to received request information sent by a limited mobile terminal with limited uplink transmission, response information used for indicating the limited mobile terminal to carry out uplink transmission is returned to the limited mobile terminal, and an assistance request is sent to an assistance mobile terminal in an idle state in a service area;

after receiving the confirmation assistance information returned by the assistance mobile terminal according to the assistance request and the uplink data sent by the limited mobile terminal according to the response information, allocating uplink transmission resources, instructing the limited mobile terminal to send data on a first resource, instructing the assistance mobile terminal to capture data on the first resource and forwarding the data by using a second resource, wherein the first resource is orthogonal to the second resource;

and demodulating and combining the data received on the first resource and the second resource respectively to obtain the uplink data with enhanced signal strength.

2. The uplink data transmission method according to claim 1, wherein the restricted mobile terminal comprises:

and in the triggering time, the reference signal received power RSRP of the adjacent cell is larger than the maximum value of the preset offset range of the RSRP of the serving cell, or the reference signal received quality RSRQ of the adjacent cell is larger than the maximum value of the preset offset range of the RSRQ of the serving cell.

3. The uplink data transmission method according to claim 2, wherein the restricted mobile terminal switches to the state of the unrestricted mobile terminal in a next trigger time if the RSRP of the neighboring cell is smaller than the minimum value of the preset offset range of the RSRP of the serving cell, or the RSRQ of the neighboring cell is smaller than the minimum value of the preset offset range of the RSRQ of the serving cell.

4. The uplink data transmitting method according to claim 3, wherein the assisting mobile terminal is an unrestricted mobile terminal.

5. The uplink data transmitting method according to claim 4, wherein the assisting mobile terminal is located within a preset range between the restricted mobile terminal and a base station location.

6. An uplink data transmission method, comprising:

if the mobile terminal is judged to be a limited mobile terminal after detecting received reference signals periodically transmitted by base stations of a serving cell and an adjacent cell, transmitting request information for requesting assistance to the base station of the serving cell;

sending uplink data according to response information which is returned by the base station and indicates uplink transmission;

and sending uplink data according to the received indication information which is sent by the base station and indicates that the data is sent on the first resource.

7. The uplink data transmission method according to claim 6, wherein the restricted mobile terminal comprises:

the mobile terminal is used for judging whether the RSRP of the adjacent cell is larger than the maximum value of the preset offset range of the RSRP of the serving cell or the RSRQ of the adjacent cell is larger than the maximum value of the preset offset range of the RSRQ of the serving cell within the trigger time;

correspondingly, the limited mobile terminal is switched to the state of the non-limited mobile terminal in the next trigger time if the RSRP of the adjacent cell is smaller than the minimum value of the preset offset range of the RSRP of the serving cell, or the RSRQ of the adjacent cell is smaller than the minimum value of the preset offset range of the RSRQ of the serving cell.

8. The uplink data transmitting method according to claim 6, wherein the method further comprises:

if the current state is idle and data can be captured on the resources appointed by the base station, returning confirmation assistance information according to the received assistance request sent by the base station;

and receiving and forwarding the data according to the received indication information which is sent by the base station and indicates to capture the data on the first resource and forward the data to the base station by using the second resource.

9. The uplink data transmitting method according to claim 8, wherein the receiving and forwarding data according to the received indication information sent by the base station and indicating that data is captured on the first resource and forwarded to the base station by using the second resource comprises:

and according to the received indication information which is sent by the base station and indicates that the data is captured on the first resource and is forwarded to the base station by using the second resource, amplifying the signal strength of the data captured on the first resource and then forwarding the data to the base station by using the second resource.

10. A base station, comprising:

the first base station module is used for returning response information for indicating the limited mobile terminal to perform uplink transmission to the limited mobile terminal according to the received request information sent by the limited mobile terminal with limited uplink transmission, and sending an assistance request to an assistance mobile terminal in an idle state in a service area;

a second base station module, configured to allocate uplink transmission resources after receiving acknowledgement assistance information returned by the assisting mobile terminal according to the assistance request and uplink data sent by the limited mobile terminal according to the response information, instruct the limited mobile terminal to send data on a first resource, instruct the assisting mobile terminal to capture data on the first resource and forward the data by using a second resource, where the first resource is orthogonal to the second resource;

and the third base station module is used for demodulating and combining the data received on the first resource and the second resource respectively to obtain the uplink data with enhanced signal strength.

11. The base station of claim 10, wherein the restricted mobile terminal comprises:

and in the triggering time, the reference signal received power RSRP of the adjacent cell is larger than the maximum value of the preset offset range of the RSRP of the serving cell, or the reference signal received quality RSRQ of the adjacent cell is larger than the maximum value of the preset offset range of the RSRQ of the serving cell.

12. The base station of claim 11, wherein the restricted mobile terminal switches to the state of the unrestricted mobile terminal when the RSRP of the neighboring cell is less than the minimum value of the preset offset range of the RSRP of the serving cell or the RSRQ of the neighboring cell is less than the minimum value of the preset offset range of the RSRQ of the serving cell during the next trigger time.

13. The base station of claim 12, wherein the assisting mobile terminal is an unrestricted mobile terminal.

14. The base station of claim 13, wherein the assisting mobile terminal is located within a predetermined range between the restricted mobile terminal and a base station location.

15. A restricted mobile terminal, comprising:

the first limited terminal module is used for detecting received reference signals periodically sent by base stations of a service cell and an adjacent cell, and sending request information for requesting assistance to the base station of the service cell after judging that the first limited terminal module is a limited mobile terminal;

the second limited terminal module is used for sending uplink data according to response information which is returned by the base station and indicates uplink transmission;

and the third limited terminal module is used for sending uplink data according to the received indication information which is sent by the base station and indicates that the data is sent on the first resource.

16. The constrained mobile terminal of claim 15, wherein the constrained mobile terminal comprises:

the mobile terminal is used for judging whether the RSRP of the adjacent cell is larger than the maximum value of the preset offset range of the RSRP of the serving cell or the RSRQ of the adjacent cell is larger than the maximum value of the preset offset range of the RSRQ of the serving cell within the trigger time;

correspondingly, the limited mobile terminal is switched to the state of the non-limited mobile terminal in the next trigger time if the RSRP of the adjacent cell is smaller than the minimum value of the preset offset range of the RSRP of the serving cell, or the RSRQ of the adjacent cell is smaller than the minimum value of the preset offset range of the RSRQ of the serving cell.

17. The constrained mobile terminal of claim 15, wherein the constrained mobile terminal further comprises:

the fourth limited terminal module is used for returning confirmation assistance information according to a received assistance request sent by the base station when the fourth limited terminal module is in an idle state at present and can capture data on resources appointed by the base station;

and the fifth limited terminal module is used for receiving and forwarding the data according to the received indication information which is sent by the base station and indicates that the data is captured on the first resource and is forwarded to the base station by using the second resource.

18. The constrained mobile terminal of claim 17, wherein the fifth constrained terminal module is further configured to:

and according to the received indication information which is sent by the base station and indicates that the data is captured on the first resource and is forwarded to the base station by using the second resource, amplifying the signal strength of the data captured on the first resource and then forwarding the data to the base station by using the second resource.

19. A communication system comprising a base station according to any of claims 10 to 14, a restricted mobile terminal according to any of claims 15 to 18, and an assisting mobile terminal; the base station, the limited mobile terminal and the assisting mobile terminal are in communication connection; wherein,

the assisting mobile terminal includes:

the first assistance terminal module is used for returning the confirmation assistance information according to the received assistance request sent by the base station;

and the second assistant terminal module is configured to receive and forward data according to the received indication information which is sent by the base station and indicates that data is captured on the first resource and is forwarded to the base station by using the second resource, so that the base station demodulates and combines the data received on the first resource and the data received on the second resource respectively to obtain uplink data with enhanced signal strength, where the first resource and the second resource are both resources for uplink transmission.