CN101729382A - Method, system and device for sending ranging code response message - Google Patents

Abstract

The embodiment of the present invention discloses a method for sending a ranging code response message, including: sending ranging code information, the ranging code information including the response position corresponding to the ranging code; the receiving terminal according to the ranging code A ranging code for information sending; a response message is sent at the response position of the ranging code. At the same time, the embodiment of the invention also discloses a terminal, a base station and a network system based on the method. After sending the response position of the ranging code, send a response message at the position where the ranging code responds; so that the terminal only needs to receive the corresponding message on the frame or subframe determined by the response position, instead of continuously monitoring the response message, which can effectively save power supply.

Description

A method, system and device for sending a ranging code response message

technical field

The invention relates to the field of communication technology, in particular to a method, system and device for distance measurement and bandwidth application.

Background technique

In the 802.16e standard of the Institute of Electrical and Electronics Engineers (IEEE), in the process of receiving the ranging code, the terminal (Mobile Station, MS) and the base station (Base Station, BS) maintain a timer, and the MS sends a measurement code. The ranging request message is sent to the BS. Within the time specified by the timer, the MS will continue to monitor the response of the BS to the ranging request message. If the MS receives a response to the corresponding ranging request message within the time specified by the timer, the MS will perform adjustment. For actions such as time offset, frequency offset, or power, if the timer expires, the MS will perform a backoff process, and then randomly select a new code for ranging.

The inventor found the following problems in the prior art during the process of implementing the present invention: the MS needs to continuously monitor the BS's response to the ranging code in the process of receiving the ranging code; the MS needs to continuously monitor the response message, resulting in waste of power.

Contents of the invention

The technical problem to be solved by the embodiments of the present invention is to provide a method, system and device for ranging and bandwidth application, which can save the power of the MS.

In order to solve the above technical problems, the embodiment of the ranging method provided by the present invention can be realized through the following technical solutions:

Sending ranging code information, where the ranging code information includes a corresponding response position of the ranging code;

receiving the ranging code sent by the terminal according to the ranging code information;

A response message is sent at the response position of the ranging code.

The embodiment of the present invention also provides a network system, including a terminal connected to a base station in a communicable manner,

Wherein the base station is used to send ranging code information to the terminal, the ranging code information includes the corresponding response position of the ranging code; receiving the ranging code sent by the terminal according to the ranging code information; in the The response position of the ranging code sends a response message to the terminal.

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

A ranging information sending unit, configured to send ranging code information, where the ranging code information includes a response position corresponding to the ranging code;

a ranging code receiving unit, configured to receive the ranging code sent by the terminal according to the ranging code information;

A response unit, configured to send a response message at the response position of the ranging code.

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

A ranging information receiving unit, configured to receive ranging code information, where the ranging code information includes the position of the corresponding response of the ranging code;

a ranging code sending unit, configured to send a ranging code to the base station according to the ranging code information;

A response receiving unit, configured to receive a response message at a response position of the ranging code.

The above technical solution has the following beneficial effects: after the response position of the ranging code is sent, a response message is sent at the position where the ranging code responds; the terminal only needs to receive the corresponding message on the frame or subframe determined by the response position, and no longer needs to Continuous monitoring of response messages can effectively save power.

Description of drawings

Fig. 1 is a schematic flow chart of the first embodiment of the method of the present invention;

Fig. 2 is the schematic flow chart of the second embodiment of the method of the present invention;

Fig. 3 is a schematic flow chart of the third embodiment of the method of the present invention;

Fig. 4 is a schematic flow chart of Embodiment 4 of the method of the present invention;

Fig. 5 is a schematic structural diagram of the system of Embodiment 5 of the present invention;

FIG. 6 is a schematic structural diagram of a base station according to Embodiment 6 of the present invention;

FIG. 7 is a schematic structural diagram of another base station according to Embodiment 6 of the present invention;

FIG. 8 is a schematic structural diagram of a terminal according to Embodiment 7 of the present invention;

FIG. 9 is a schematic structural diagram of another terminal according to Embodiment 7 of the present invention;

Fig. 10 is a schematic structural diagram of the eighth system of Embodiment 8 of the present invention;

FIG. 11 is a schematic structural diagram of a base station according to Embodiment 9 of the present invention;

FIG. 12 is a schematic structural diagram of another base station according to Embodiment 9 of the present invention;

FIG. 13 is a schematic diagram of a terminal structure according to an embodiment of the present invention;

FIG. 14 is a schematic structural diagram of another terminal according to Embodiment 10 of the present invention.

Detailed ways

Embodiments of the present invention provide a method, system, and device for sending a ranging code response, which can be realized through the following schemes: sending ranging code information; the ranging code information includes the response position corresponding to the ranging code; receiving The ranging code sent by the ranging code information; a response message is sent at the response position of the above ranging code.

In the above solution, after sending the response position of the ranging code, a response message is sent at the position where the ranging code responds; the terminal no longer needs to continuously monitor the response message, which can save power.

In the subsequent embodiments, the above-mentioned solution will be described in more detail by using the ranging method and the bandwidth application method respectively.

Embodiment 1, as shown in FIG. 1 , a distance measuring method provided by an embodiment of the present invention may include:

Step 101: Send ranging code information;

The above ranging code information may include the position information of the corresponding response of the ranging code, and may also include the information of the ranging code grouping;

The position information corresponding to the sent ranging code response may be: sending the position information corresponding to the ranging code carried in the offset cell or window cell of the channel description message;

The location information corresponding to the response of the ranging code carried in the above-mentioned offset information element may be: the frame or subframe corresponding to the response of the above-mentioned ranging code carried in the above-mentioned offset information element;

The position information of the response corresponding to the ranging code carried in the window cell may be: the range of the frame or the range of the subframe carrying the response corresponding to the ranging code in the window cell;

Step 102: Receive the ranging code sent according to the above ranging code information;

Step 103: Send the response of the ranging code at the position of the above-mentioned response. The response of the above-mentioned ranging code can be a ranging response message; an uplink media access protocol message can also be sent, and the Code Division Multiple Access (CDMA) in this message Access, CDMA) allocation information element can allocate resources for the following ranging request message.

When the offset cell carries a frame or subframe corresponding to the ranging code, receiving the ranging response at the position of the response may be: receiving the ranging response at the responding frame or subframe;

When the above-mentioned window cell carries the range of the frame or the range of the subframe corresponding to the response of the above-mentioned ranging code, the above-mentioned receiving the ranging response at the position of the response may be: receiving the ranging response within the range of the above-mentioned frame or the range of the sub-frame ;

Step 104: receiving the ranging request message sent by the terminal according to the above-mentioned CDMA assignment information element; and sending a ranging response message to the above-mentioned ranging request message.

In the above embodiment, after the terminal receives the location information of the ranging response, it receives the ranging response at the corresponding position, which eliminates the need to continuously monitor the response, thereby saving power.

The above-mentioned offset cell or window cell can also carry the priority identification of the ranging code;

The foregoing receiving the ranging code according to the ranging code information may be: receiving the ranging code according to the ranging code information and the priority identifier.

Different offset cells or window cells are set for ranging codes of different priorities, so that MSs that send ranging codes of different priorities can back off at different time points; further reflecting the different priorities of services or users, improving the user experience.

Embodiment 2, as shown in FIG. 2 , this embodiment will further describe the idea of Embodiment 1.

Step 201: MS receives ranging code information;

The foregoing ranging code information may include position information of the corresponding response of the ranging code, and may also include information of ranging code groups.

The position information corresponding to the above ranging code can be described in the downlink channel description/uplink channel description (DCD/UCD, Downlink channel descriptor/Uplink channel descriptor) or downlink media access protocol/uplink media access protocol (DL-MAP/UL- MAP, Downlink Medium Access Protocol/Uplink Medium Access Protocol) message; the specific carrying method can be: frame/subframe offset cell or window cell is carried in the UCD message, and the offset cell can be used to notify the MS The frame or subframe where the response corresponding to the ranging code to be sent is located, and the window information element can be used to notify the MS of the range of the frame or the range of the subframe where the response corresponding to the ranging code to be sent is located. The specific method can be: when using the offset cell, the MS can obtain the frame or subframe where the ranging code to be sent by the MS is located, and then add the frame or subframe number to the offset contained in the UCD message. Obtain the frame or subframe of the response corresponding to the above ranging code; when using the window cell, the MS can obtain the frame or subframe where the ranging code to be sent by the MS is located, and the ranging code response is in the frame or subframe where the ranging code is located. Between the frame and the frame or subframe corresponding to the frame or subframe number of the ranging code plus the value of the message window. Of course, it is also possible to carry the position information of the corresponding response of the ranging code in other ways, which will not affect the implementation of the embodiment of the present invention. It can be understood that the specific carrying method of the position information of the corresponding response of the ranging code will not affect the implementation of the present invention Examples constitute limitations.

Furthermore, it can also be distinguished that different priorities have different frame/subframe offsets, which means that code groups with different priorities are supported to back off at different time points. The method of carrying frame/subframe offset information in the UCD message can be:

When using the frame offset, you can add the frame offset length type value (TLV, Type-Length-Value) in the UCD message; this embodiment will provide two ways, as shown in Table 1 and Table 2:

Table 1 does not support TLVs for prioritized ranging codes

name type Length value Frame offset (frameoffset) 218 1 0-7 bits: the specific value of the frame offset.

Table 2 TLVs supporting prioritized ranging codes

name type Length value Frame offset (frameoffset) 219 1 0-1 bit: the priority group identification of the ranging code (corresponding to a certain priority) 2-7 bits: the specific value of the frame offset.

When using the frame window, you can add the frame window length type value (TLV: Type-Length-Value) in the UCD message; this embodiment will provide two ways, as shown in Table 3 and Table 4:

Table 3 does not support TLVs for prioritized ranging codes

name type Length value Frame window (framewindow) 218 1 0-7 bits: the specific value of the frame window.

Table 4 TLVs supporting prioritized ranging codes

name type Length value Frame window (framewindow) 219 1 0-1 bit: the priority group identification of the ranging code (corresponding to a certain priority) 2-7 bits: the specific value of the frame window.

Step 202: MS can send a ranging code among the ranging codes given in step 201;

Step 203: The MS receives the response of the ranging code at the position of the above-mentioned response: a ranging response (RNG-RSP: Ranging Response) message; and sends an uplink media access protocol message, and the CDMA assignment information element in the message can be the following The ranging request message allocates resources.

Step 204: The MS sends a ranging request (RNG-REQ, Ranging Request) message in the resource specified by the ranging response in step 203, and this message may carry the MS's Media Access Control (MAC, MediaAccess Control) address identifier;

Step 205: The BS sends a RNG-RSP message to respond to the ranging request RNG-REQ message of the MS. The RNG-RSP message may also carry a basic connection identifier allocated for the MS.

In the above embodiment, after receiving the location information of the ranging response, the ranging response is received at the corresponding position, and there is no need to continuously monitor the response, which can save electric energy. Different offset cells or window cells are set for ranging codes of different priorities, so that MSs that send ranging codes of different priorities can back off at different time points; further reflecting the different priorities of services or users, improving the user experience.

Embodiment 3, as shown in FIG. 2 , the embodiment of the present invention also provides a method for bandwidth application, which may include:

Step 301: Send ranging code information;

The foregoing ranging code information may include position information of the corresponding response of the ranging code, and may also include information of ranging code groups.

The location information for receiving the resource assignment response corresponding to the above ranging code may be:

The location information of the resource assignment response corresponding to the ranging code carried in the offset cell or the window cell of the channel description message is received.

When the above offset information element carries the location information of the resource response corresponding to the ranging code, it may be:

The frame or subframe of the response corresponding to the above-mentioned ranging code is carried in the above-mentioned offset information element; then the above-mentioned receiving the ranging response at the position of the response may be: receiving the ranging response at the above-mentioned frame or sub-frame.

When the above window information element carries the location information of the resource response corresponding to the ranging code, it can be:

The frame range or subframe range of the response corresponding to the ranging code carried in the window cell; the receiving the ranging response at the position of the response may be: receiving the ranging response within the frame range or subframe range.

Step 302: Receive the ranging code sent according to the above ranging code information;

Step 303: Send the response of the ranging code at the position of the above-mentioned response. The above-mentioned response of the ranging code may be a CDMA assignment information element in the uplink media access protocol message, and may also be called a resource assignment response. The above-mentioned CDMA assignment information element Resources can be allocated for the next bandwidth request message;

Step 304: Send a bandwidth application message according to the above resource assignment response.

In the above embodiment, after receiving the location information of the resource assignment response, the resource assignment response is received at the corresponding location, and there is no need to continuously monitor the response, which can save electric energy.

The above-mentioned offset cell or window cell can also carry the priority identification of the ranging code;

The foregoing sending the ranging code to the base station according to the ranging code information may be: sending the ranging code to the base station according to the ranging code information and the priority identifier.

Different offset cells or window cells are set for ranging codes of different priorities, so that MSs that send ranging codes of different priorities can back off at different time points; further reflecting the different priorities of services or users, improving the user experience.

Embodiment 4, as shown in FIG. 4 , this embodiment will further describe the idea of Embodiment 3.

Step 401: The MS receives the ranging code information and the location information of the resource assignment response corresponding to the ranging code;

The above ranging code information and the location information of the resource assignment response corresponding to the above ranging code can be carried in DCD/UCD and DL-MAP/UL-MAP messages; the specific carrying method can be: in the UCD message with frame/ Subframe offset information element or window information element. The offset information element can be used to inform the MS of the frame or subframe where the resource assignment response corresponding to the ranging code to be sent is located. The window information element can be used to inform the MS of the resource assignment response to be sent. The range of the frame or the range of the subframe where the resource assignment response corresponding to the ranging code is located. For a specific implementation manner, reference may be made to the ranging code response method in Embodiment 3.

Furthermore, it can also be distinguished that different priorities have different frame/subframe offsets, which means that code groups with different priorities are supported to back off at different time points. For the specific carrying manner of the frame/subframe offset information, reference may also be made to the carrying manner of the frame/subframe offset information in Embodiment 3, which will not be repeated here.

Step 402: MS can send a ranging code among the ranging codes given in step 201;

Step 403: The MS receives a resource assignment response (CDMA assignment information element) at the position of the above response;

Step 404: Send bandwidth application Media Access Control (MAC, Media Access Control 1) header message to apply for bandwidth in the resources specified in step 403 resource assignment response;

Step 405: The BS allocates uplink data resources for the MS according to the bandwidth application information in step 404;

Step 406: The MS sends uplink data in the resource allocated in step 405.

In the above embodiment, after receiving the location information of the resource assignment response, the resource assignment response is received at the corresponding location, and there is no need to continuously monitor the response, which can save electric energy. Different offset cells or window cells are set for ranging codes of different priorities, so that MSs that send resource assignment responses of different priorities can back off at different time points; further reflecting the different priorities business or users, improving the user experience.

Embodiment 5, as shown in FIG. 5 , the embodiment of the present invention also provides a network system, which may include:

The terminal 501 is configured to receive the ranging code information and the location information corresponding to the above-mentioned ranging code response; send the ranging code to the base station 502 according to the above-mentioned ranging code information; receive the ranging response at the position of the above-mentioned response;

The base station 502 is configured to send ranging code information to the terminal, where the ranging code information includes position information corresponding to the ranging code; receiving the ranging code sent by the terminal 501 according to the ranging code information; The terminal sends a ranging response; sends a resource assignment cell to the terminal;

The terminal 501 can also be used to send a ranging request message to the base station 502 according to the above-mentioned ranging response;

The base station 502 may also be configured to receive a ranging request message sent according to the resource assignment information element.

The above-mentioned terminal 501 is also used to receive the priority identification of the ranging code; send the ranging code to the base station 502 according to the ranging code information and the priority identification;

The above-mentioned base station 502 is also configured to send the priority identifier of the ranging code.

In the above embodiment, after the terminal receives the location information of the ranging response, it receives the ranging response at the corresponding position, which eliminates the need to continuously monitor the response, thereby saving power. By using different ranging code priorities, MSs sending ranging codes with different priorities can be backed off at different time points; further reflecting services or users with different priorities, and improving user experience.

Embodiment 6, as shown in FIG. 6 , the embodiment of the present invention also provides a base station, which may include:

A ranging information sending unit 601, configured to send ranging code information and location information corresponding to the above ranging code;

The ranging code receiving unit 602 is configured to receive the ranging code sent by the terminal according to the above ranging code information;

A response unit 603, configured to send a ranging response at the position of the above response; and send a resource assignment information element;

Functional units for receiving ranging requests may also be included:

The ranging request receiving unit 604 is configured to receive the ranging request message sent according to the resource assignment information element.

In the above embodiment, after the terminal receives the location information of the ranging response, it receives the ranging response at the corresponding position, which eliminates the need to continuously monitor the response, thereby saving power.

As shown in FIG. 7, the base station in the sixth embodiment may further include:

A priority identifier sending unit 701, configured to send the priority identifier of the above-mentioned ranging code;

The above-mentioned ranging code receiving unit 602 is also configured to receive the ranging code sent by the terminal according to the ranging code information and the priority identifier.

By using different ranging code priorities, MSs sending ranging codes with different priorities can be backed off at different time points; further reflecting services or users with different priorities, and improving user experience.

Embodiment 7, as shown in FIG. 8 , the embodiment of the present invention also provides a terminal, which may include:

The ranging information receiving unit 801 is configured to receive the ranging code information and the position information corresponding to the above-mentioned ranging code;

A ranging code sending unit 802, configured to send the ranging code to the base station according to the above ranging code information;

The response receiving unit 803 is configured to receive the ranging response at the position of the above response; it can also be used to send resource assignment information elements;

A unit that sends ranging requests can also be included:

A ranging request sending unit 804, configured to send a ranging request message to the base station according to the resource assignment information element.

In the above embodiment, after the terminal receives the location information of the ranging response, it receives the ranging response at the corresponding position, which eliminates the need to continuously monitor the response, thereby saving power.

As shown in FIG. 9, the terminal in the seventh embodiment above may further include:

A priority identification receiving unit 901, configured to receive the priority identification of the above-mentioned ranging code;

The above-mentioned ranging code sending unit 804 is also configured to identify the sent ranging code according to the ranging code information and priority.

By using different ranging code priorities, MSs sending ranging codes with different priorities can be backed off at different time points; further reflecting services or users with different priorities, and improving user experience.

Embodiment 8, as shown in FIG. 10 , the embodiment of the present invention also provides another network system, which may include:

The terminal 1001 is configured to receive the ranging code information and the location information of the resource assignment response corresponding to the above ranging code; send the ranging code to the base station 1002 according to the above ranging code information; receive the resource assignment response at the location of the above response;

The base station 1002 is configured to send the ranging code information and the position information of the resource assignment response corresponding to the above ranging code; receive the ranging code sent according to the above ranging code information; send the resource assignment response at the position of the above response;

The terminal 1001 may also be configured to send a bandwidth application message according to the above resource assignment response;

The base station 1002 may also be configured to receive the bandwidth application message sent according to the above resource assignment response.

The above-mentioned terminal 1001 is also used for receiving the priority identification of the ranging code; sending the ranging code to the base station 1002 according to the ranging code information and the priority identification;

The above-mentioned base station 1002 is also configured to send the priority identifier of the ranging code.

In the above embodiment, after receiving the location information of the resource assignment response, the terminal receives the resource assignment response at the location of the response, which eliminates the need to continuously monitor the response and saves power. Different priorities are set for ranging codes of different priorities, so that MSs that send resource assignment responses of different priorities can back off at different time points; further reflecting services or users of different priorities, and improving user experience.

Embodiment 9, as shown in FIG. 11 , the embodiment of the present invention also provides another base station, which may include:

A bandwidth application information sending unit 1101, configured to send the ranging code information and the location information of the resource assignment response corresponding to the above ranging code;

A ranging code receiving unit 1102, configured to receive the ranging code sent according to the above-mentioned ranging code information;

A response unit 1103, configured to send a resource assignment response at the position of the above response;

May also include units for sending bandwidth requests:

The bandwidth application request receiving unit 1104 is configured to receive the bandwidth application message sent according to the above resource assignment response.

In the above embodiment, after receiving the location information of the resource assignment response, the terminal receives the resource assignment response at the location of the response, which eliminates the need to continuously monitor the response and saves power.

As shown in FIG. 12, the base station in the above ninth embodiment may further include:

A priority identification sending unit 1201, configured to send the priority identification of the above-mentioned ranging code;

The above-mentioned ranging code receiving unit 1104 is also configured to receive the ranging code sent according to the ranging code information and the priority identifier.

Different priorities are set for ranging codes of different priorities, so that MSs that send resource assignment responses of different priorities can back off at different time points; further reflecting services or users of different priorities, and improving user experience.

Implementation Example 10, as shown in FIG. 13 , the embodiment of the present invention also provides a terminal, which may include:

The bandwidth application information receiving unit 1301 is configured to receive the ranging code information and the location information of the resource assignment response corresponding to the above ranging code;

A ranging code sending unit 1302, configured to send the ranging code to the base station according to the above ranging code information;

A response receiving unit 1303, configured to receive a resource assignment response at the location of the above response;

May also include units for sending bandwidth requests:

A bandwidth application request sending unit 1304, configured to send a bandwidth application message according to the above resource assignment response.

In the above embodiment, after receiving the location information of the resource assignment response, the terminal receives the resource assignment response at the location of the response, which eliminates the need to continuously monitor the response and saves power.

As shown in Figure 14, the terminal in the tenth embodiment above may also include

A priority identification receiving unit 1401, configured to receive the priority identification of the above-mentioned ranging code;

The above-mentioned ranging code sending unit 1304 is also configured to identify the sent ranging code according to the ranging code information and the priority.

Different priorities are set for ranging codes of different priorities, so that MSs that send resource assignment responses of different priorities can back off at different time points; further reflecting services or users of different priorities, and improving user experience.

Those of ordinary skill in the art can understand that all or part of the steps in the method of the above-mentioned embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, and the above-mentioned storage The medium can be read-only memory, magnetic or optical disk, etc.

A method, system and device for transmitting ranging codes provided by the embodiments of the present invention have been described above in detail. In this paper, specific examples are used to illustrate the principle and implementation of the present invention. The description of the above embodiments is only used To help understand the method of the present invention and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and scope of application. In summary, this specification The content should not be construed as a limitation of the invention.

Claims (12)

1. A method for sending a ranging code response message, comprising: Sending ranging code information, where the ranging code information includes a corresponding response position of the ranging code; receiving the ranging code sent by the terminal according to the ranging code information; A response message is sent at the response position of the ranging code. 2. The method according to claim 1, wherein the sending a response message comprises: Send ranging response or resource assignment message. 3. according to the described method of claim 1 or 2, it is characterized in that, The response position corresponding to the ranging code is carried by an offset cell or a window cell. 4. The method according to claim 3, wherein the response position corresponding to the ranging code carried by an offset cell includes: The frame or subframe of the response corresponding to the ranging code is carried by an offset information element. 5. The method according to claim 3, wherein the response position corresponding to the ranging code carried by the window cell includes: The range of the response frame or the range of the subframe corresponding to the ranging code is carried in a window cell. 6. method according to claim 3, is characterized in that, The offset cell or window cell also carries a ranging code priority identifier; The receiving the ranging code sent according to the ranging code information includes: receiving the ranging code sent according to the ranging code information and the priority identifier. 7. A network system, comprising a terminal, connected to a base station in a communicable manner, characterized in that, The base station sends ranging code information to the terminal, and the ranging code information includes a response position corresponding to the ranging code; receiving the ranging code sent by the terminal according to the ranging code information; The response location sends a response message to the terminal. 8. The system according to claim 7, characterized in that, The base station is further configured to send the priority identifier of the ranging code, and receive the ranging code sent by the terminal according to the ranging code information and the priority identifier. 9. A base station, characterized in that it comprises: A ranging information sending unit, configured to send ranging code information, where the ranging code information includes a response position corresponding to the ranging code; a ranging code receiving unit, configured to receive the ranging code sent by the terminal according to the ranging code information; A response unit, configured to send a response message at the response position of the ranging code. 10. The base station according to claim 9, further comprising: a priority identification sending unit, configured to send the priority identification of the ranging code; The ranging code receiving unit is further configured to receive the ranging code sent according to the ranging code information and the priority identification. 11. A terminal, characterized in that, comprising: A ranging information receiving unit, configured to receive ranging code information, where the ranging code information includes the position of the corresponding response of the ranging code; a ranging code sending unit, configured to send a ranging code to the base station according to the ranging code information; A response receiving unit, configured to receive a response message at a response position of the ranging code. 12. The terminal according to claim 11, further comprising: a priority identification receiving unit, configured to receive the priority identification of the ranging code; The ranging code sending unit is further configured to send the ranging code according to the ranging code information and the priority identification.

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