CN104683058B - Wireless frame sending method, device and base station - Google Patents

Abstract

The present invention provides a method, device and base station for sending a radio frame. The method includes: determining a radio frame, wherein the radio frame includes: a preamble field, a signaling field, a data field, or further includes an auxiliary information field. The command field carries at least one of the following: first indication information used to indicate the bandwidth used for sending the auxiliary information field and/or data field, second indication information used to indicate the modulation technique used in the auxiliary information field and/or data field Indication information; the radio frame is sent according to the first indication information and the second indication information, and the present invention solves the problem of existing in the related art when there are multiple different system bandwidths for channelization and multiple modulation techniques can be used. The frame structure of the wireless frame cannot realize the problem of normal communication between the sender and the receiver, and thus achieves the effect of effectively identifying the frame format of the wireless frame and successfully realizing wireless communication when the system has multiple channelizations and uses multiple modulation techniques.

Description

Radio frame transmission method, device and base station

technical field

The present invention relates to the field of communications, and in particular, to a method, an apparatus and a base station for transmitting a radio frame.

Background technique

In the field of wireless networks, wireless local area networks (Wireless Local, WLAN for short) used in unlicensed frequency bands have developed rapidly. However, due to the limited number of unlicensed frequency bands in low frequency bands, the spectrum is becoming more and more crowded, and user experience is getting worse. There are also unlicensed frequency bands in the millimeter-wave band, and the available spectrum is wide. Using the millimeter-wave band for short-range ultra-high-speed wireless communication is an ideal choice. For example, there are already multiple wireless communication standards in the 60GHz frequency band, such as IEEE802.11ad, IEEE802.15.3c, etc. In the existing standards, two modulation technologies of single carrier and OFDM are applied, and multiple sub-subs are divided in the 60GHz frequency band. Channel, each sub-channel has a fixed width of 2.16GHz, and the radio frame structure is also fixed, consisting of three parts. Figure 1 is a schematic diagram of the general format of a radio frame under the 60GHz standard in the related art. As shown in Figure 1, the radio frame includes 3 parts, including: preamble domain (for signal acquisition, time-frequency domain synchronization, channel estimation, etc.), signaling domain (for decoding subsequent data domain), and data domain (carrying information); if there are multiple different channelizations When the system bandwidth and multiple modulation technologies can be used, and when different modulation technologies and bandwidths are used in different parts of the same wireless frame, in order to enable normal communication between the sending and receiving parties, the existing wireless frame frame structure cannot achieve the above. Normal communication between sender and receiver.

Therefore, in the related art, when there are multiple different system bandwidths for channelization and multiple modulation techniques can be used, the existing radio frame structure cannot realize the normal communication between the sender and the receiver.

SUMMARY OF THE INVENTION

The present invention provides a method, device and base station for transmitting a radio frame, so as to at least solve the problem of the existing radio frame structure when there are multiple different system bandwidths for channelization and multiple modulation techniques can be used in the related art. The problem of normal communication between the sender and the receiver cannot be realized.

According to an aspect of the present invention, a method for sending a radio frame is provided, comprising: determining a radio frame, wherein the radio frame includes: a preamble field, a signaling field, a data field, or further includes an auxiliary information field, where The signaling field carries at least one of the following: first indication information used to indicate the bandwidth used for sending the auxiliary information field and/or the data field, used to indicate the auxiliary information field and/or the The second indication information of the modulation technology adopted in the data domain; the radio frame is sent according to the first indication information and the second indication information.

Preferably, the bandwidth used by the auxiliary information field and/or the data field includes at least one of the following: 540 MHz and 1080 MHz.

Preferably, the modulation technique used in the auxiliary information field and/or the data field includes at least one of the following: a single-carrier modulation technique and a multi-carrier modulation technique.

Preferably, when the second indication information is used to indicate the modulation technique used by the data field, the signaling field carries third indication information used to indicate the modulation technique of the auxiliary information field.

Preferably, the third indication information is the number of spatial streams and/or space-time streams in the signaling domain.

Preferably, at least two of the first indication information, the second indication information and the third indication information exist in the same indication information field in the signaling field.

Preferably, the second indication information is carried in a preamble field.

Preferably, the bandwidth used by the auxiliary information field and/or the data field, the auxiliary information field and/or the Indicates the modulation technique used in the data domain.

According to another aspect of the present invention, an apparatus for sending a radio frame is provided, comprising: a determining module configured to determine a radio frame, wherein the radio frame includes: a preamble field, a signaling field, a data field, or further It includes an auxiliary information field, and the signaling field carries at least one of the following: first indication information used to indicate the bandwidth used for sending the auxiliary information field and/or the data field, used to indicate the auxiliary information field and/or second indication information of the modulation technology used in the data field; a sending module, configured to send the radio frame according to the first indication information and the second indication information.

According to another aspect of the present invention, a base station is provided, including the above-mentioned apparatus for transmitting a radio frame.

According to the present invention, a determined radio frame is adopted, wherein the radio frame includes: a preamble field, a signaling field, a data field, or further includes an auxiliary information field, and the signaling field carries at least one of the following: first indication information indicating the bandwidth used for sending the auxiliary information field and/or the data field, and second indication information for indicating the modulation technique used in the auxiliary information field and/or the data field; Sending the radio frame according to the first indication information and the second indication information solves the problem of existing radio frames in the related art when there are multiple different system bandwidths for channelization and multiple modulation techniques can be used. The frame structure cannot realize the problem of normal communication between the sender and the receiver, and thus achieves the effect of effectively identifying the frame format of the wireless frame and successfully realizing wireless communication when there are multiple channelizations in the system and multiple modulation techniques are used.

Description of drawings

The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

1 is a schematic diagram of a general format of a radio frame under the 60GHz standard in the related art;

FIG. 2 is a flowchart of a method for transmitting a radio frame according to an embodiment of the present invention;

3 is a structural block diagram of an apparatus for transmitting a radio frame according to an embodiment of the present invention;

4 is a structural block diagram of a base station according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a frame format of a radio frame under multiple modulation technologies under multi-channelization according to an embodiment of the present invention.

Detailed ways

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and in conjunction with embodiments. It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict.

A method for sending a radio frame is provided in this embodiment, and FIG. 2 is a flowchart of a method for sending a radio frame according to an embodiment of the present invention. As shown in FIG. 2 , the process includes the following steps:

Step S202, determining a radio frame, wherein the radio frame includes: a preamble field, a signaling field, a data field, or further includes an auxiliary information field, where the signaling field carries at least one of the following: used to indicate sending auxiliary information The first indication information of the bandwidth used by the domain and/or the data domain, and the second indication information used to indicate the modulation technique used by the auxiliary information domain and/or the data domain;

Step S204, sending a radio frame according to the first indication information and the second indication information.

Through the above steps, the bandwidth used in the auxiliary information field and the data field after the signaling field of the radio frame and the modulation technology used are indicated in the signaling field, which not only solves the problem of multiple channelization problems in the related art When different system bandwidths are used and multiple modulation technologies can be used, the existing wireless frame structure cannot realize the problem of normal communication between the sender and the receiver, and thus achieves the problem that when there are multiple channelizations in the system and multiple modulation technologies are used, effective Identify the frame format of the wireless frame, and achieve the effect of wireless communication smoothly.

It should be noted that the bandwidth used in the auxiliary information domain and/or the data domain includes at least one of the following: 540 MHz and 1080 MHz. The modulation technique used in the auxiliary information domain and/or the data domain includes at least one of the following: a single-carrier modulation technique and a multi-carrier modulation technique.

In addition, in the case where the second indication information is only used to indicate the modulation technique used in the data field, the signaling indication field carries third indication information used to indicate the modulation technique used in the auxiliary information field. The third indication information may be the number of spatial streams and/or space-time streams in the signaling indication domain.

Preferably, the second indication information may indicate the modulation technique in the form of a numerical value. The second indication information may also be carried in the preamble field. In addition, at least two of the first indication information, the second indication information, and the third indication information may exist in the same indication information field in the signaling field.

Preferably, the bandwidth used in the auxiliary information field and/or the data field, and the modulation technique used in the auxiliary information field and/or the data field may also be indicated in a manner of jointly indicating the first indication information and the second indication information.

This embodiment also provides an apparatus for transmitting a radio frame, which is used to implement the above-mentioned embodiments and preferred implementations, and what has been described will not be repeated. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, implementations in hardware, or a combination of software and hardware, are also possible and contemplated.

FIG. 3 is a structural block diagram of an apparatus for transmitting a radio frame according to an embodiment of the present invention. As shown in FIG. 3 , the apparatus includes a determination module 32 and a transmission module 34 , and the apparatus will be described below.

The determining module 32 is configured to determine a radio frame, wherein the radio frame includes: a preamble field, a signaling field, a data field, or further includes an auxiliary information field, wherein the signaling field carries at least one of the following: used to indicate Send the first indication information of the bandwidth used in the auxiliary information field and/or the data field, and the second indication information used to indicate the modulation technique used in the auxiliary information field and/or the data field; the sending module 34 is connected to the above-mentioned determining module 32, for sending the radio frame according to the first indication information and the second indication information.

FIG. 4 is a structural block diagram of a base station according to an embodiment of the present invention. As shown in FIG. 4 , the base station 40 includes the above-mentioned radio frame sending apparatus 42 .

In the related art, for applications in the 40-50 GHz frequency band, there are two bandwidth sub-channels for channelization in this frequency band, for example, 540 MHz and 1080 MHz. In the case of the coexistence of two channels, a part of a radio frame sent is sent in 540MHz channelized format, and a part is sent in 1080MHz channelized format, then the radio frame format needs to contain additional fields to complete the time-frequency domain synchronization, automatic Functions such as gain control and channel estimation, that is, adding a new field between the signaling field and data field of the existing radio frame format, which is called the auxiliary information field. Figure 5 shows a schematic diagram of the frame format of wireless frames under various modulation technologies. As shown in Figure 5, there are various formats of the auxiliary information field. For example, different bandwidths and different modulation technologies are used. In an actual wireless communication, the format used There is only one type, which effectively realizes the format of indicating the auxiliary information field in the wireless frame, so that the wireless communication can be carried out smoothly.

The following describes the indication information of the auxiliary information field and/or the data field in the radio frame frame format provided by the embodiment of the present invention.

The radio frame preamble field and the signaling field or the signaling field carry the first indication information and the second indication information, and the first indication information and the second indication information jointly indicate the format of the field carried after the radio frame signaling field; One indication information is bandwidth information; the bandwidth information is used to indicate the bandwidth information used by all the fields following the signaling field of the physical frame; the bandwidth indication information is carried in the signaling field; it should be noted that the bandwidth indication information can indicate the subchannelization scheme in the one or more bandwidth values; preferably, the second indication information is modulation technology information; the modulation technology information is used to indicate the data domain behind the signaling domain, or the modulation technology used in the auxiliary information domain and the data domain; the modulation technology information bears In the preamble field or signaling field of the radio frame;

Wherein, the modulation technology information at least includes single-carrier modulation technology and OFDM modulation technology;

Specific instructions are given as examples below.

When the bandwidth indication information indicates 540MHz, and the modulation technology information indicates the single-carrier modulation technology, only the data domain is carried after the signaling domain, and the data domain uses the single-carrier modulation technology, occupying a bandwidth of 540MHz;

When the bandwidth indication information indicates 1080MHz, and the modulation technology indicates the single-carrier modulation technology, the signaling domain carries the auxiliary information domain and the data domain, and the auxiliary information domain and the data domain use the single-carrier modulation technology, occupying a bandwidth of 1080MHz;

When the modulation technology information indicates the OFDM modulation technology, the data domain uses the OFDM modulation technology;

When the modulation technology information indicates the OFDM modulation technology, the signaling domain further includes a third indication information domain, which is used to indicate the modulation technology used in the auxiliary information domain when the second indication information indicates the OFDM modulation technology;

Wherein, the third information indication field can multiplex the spatial stream or space-time stream indication field in the signaling field. When the spatial stream or space-time stream indication field indicates two or more spatial streams or space-time streams, The auxiliary information domain uses OFDM modulation technology, and when the spatial stream or space-time stream indication field indicates one spatial stream or space-time stream, the auxiliary information domain uses single-carrier modulation technology;

It should be noted that the above-mentioned first indication information and second indication information may exist in the same indication information domain, bearer and signaling domains; the second indication information and third indication information may exist in the same indication information domain , in the bearer and signaling domains; the first indication information, the second indication information and the third indication information may also exist in the same indication information domain, in the bearer and signaling domains.

Through the above embodiments and preferred implementations, when there are multiple channelization schemes and multiple modulation techniques in the system, the frame format of the radio frame can be effectively identified, and the radio communication can be completed.

Hereinafter, the system includes multiple channels, and various combinations of multiple modulation techniques are used to illustrate the present invention. It should be pointed out that in a wireless system, the channelization scheme includes N sub-channels with different bandwidths (N is an integer greater than or equal to 2), and the modulation techniques that the system can use include single-carrier modulation techniques and multi-carrier modulation techniques such as OFDM. technology, in the following preferred embodiments, two sub-channelization schemes with different bandwidths are mainly used as examples for description.

Preferred Embodiment 1

In a wireless system, there are two channel bandwidths, 540MHz and 1080MHz. The preamble field and signaling field of the radio frame sent by the station use the 540MHz bandwidth, and use the agreed format for transmission. The preamble field is used for time-frequency domain synchronization. , channel estimation, automatic gain control, etc. In addition, the preamble domain indicates the modulation technology used in the subsequent auxiliary information domain and data domain by using different preamble sequences. In this preferred embodiment, the single-carrier modulation technology is indicated, and the signaling domain carries The bandwidth information used in the subsequent auxiliary information field and data field is 540 MHz. In this radio frame, only the data field is carried after the signaling field, and the auxiliary information field is not carried, and the data field uses a bandwidth of 540 MHz.

Preferred Embodiment 2

In a wireless system, there are two channel bandwidths, 540MHz and 1080MHz. The preamble field and signaling field of the radio frame sent by the station use the 540MHz bandwidth, and use the agreed format for transmission. The preamble field is used for time-frequency domain synchronization. , channel estimation, automatic gain control, etc. In addition, the preamble domain indicates the modulation technology used in the subsequent auxiliary information domain and data domain by using different preamble sequences. In this preferred embodiment, the single-carrier modulation technology is indicated, and the signaling domain carries The bandwidth information used in the subsequent auxiliary information domain and data domain is 1080MHz. In this radio frame, the signaling domain carries two domains, the auxiliary information domain and the data domain, both of which use single-carrier modulation technology and occupy 1080MHz bandwidth.

Preferred Embodiment Three

In a wireless system, there are two channel bandwidths, 540MHz and 1080MHz. The preamble field and signaling field of the radio frame sent by the station use the 540MHz bandwidth, and use the agreed format for transmission. The preamble field is used for time-frequency domain synchronization. , channel estimation, automatic gain control, etc. In addition, the preamble domain indicates the modulation technology used in the subsequent domain by using different preamble sequences. In this preferred embodiment, the OFDM modulation technology is indicated, and the signaling domain carries the subsequent auxiliary information domain and data. The bandwidth information used by the domain is 1080MHz. In this radio frame, the auxiliary information domain and the data domain are carried behind the signaling domain, both of which use single-carrier modulation technology and occupy a bandwidth of 1080MHz.

Preferred Embodiment Four

In a wireless system, there are two channel bandwidths, 540MHz and 1080MHz. The preamble field and signaling field of the radio frame sent by the station use the 540MHz bandwidth, and use the agreed format for transmission. The preamble field is used for time-frequency domain synchronization. , channel estimation, automatic gain control, etc. In addition, the preamble domain indicates the modulation technology used in the subsequent data domain by using different preamble sequences. In this preferred embodiment, the OFDM modulation technology is indicated, and the signaling domain carries the subsequent auxiliary information domain and The bandwidth information used in the data domain is 1080MHz. In addition, the signaling domain also carries modulation technology indication information in the auxiliary information domain, which can indicate OFDM modulation technology or single-carrier modulation technology, and indicates the modulation technology used in the subsequent auxiliary information domain. In this wireless frame , the auxiliary information field is carried behind the signaling field, and the modulation technology is used to indicate the modulation technology indication information of the auxiliary information field, occupying a bandwidth of 1080MHz.

Preferred Embodiment Five

In a wireless system, there are two channel bandwidths, 540MHz and 1080MHz. The preamble field and signaling field of the radio frame sent by the station use the 540MHz bandwidth, and use the agreed format for transmission. The preamble field is used for time-frequency domain synchronization. , channel estimation, automatic gain control, etc. In addition, the preamble domain indicates the modulation technology used in the subsequent data domain by using different preamble sequences. In this preferred embodiment, the OFDM modulation technology is indicated, and the signaling domain carries the subsequent auxiliary information domain and The bandwidth information used in the data field, which is indicated as 1080MHz in this preferred embodiment. In addition, the signaling field also carries the number of spatial streams or the number of space-time streams to indicate the number of spatial streams or space-time streams used in the subsequent data fields. The number of streams or the number of space-time streams indicates that when one spatial stream or number of space-time streams is used in the data field, the auxiliary information field uses single-carrier modulation, and when the number of spatial streams or the number of space-time streams indicates that the data field uses 2 or more When the number of spatial streams or the number of space-time streams is 1, the auxiliary information domain uses OFDM modulation. Assuming that in this embodiment, the number of spatial streams or the number of space-time streams indicates that the data field uses 2 space-time streams, then in this radio frame, the signaling field carries the auxiliary information field and the data field, and both fields use OFDM modulation technology, occupying 1080MHz bandwidth.

Preferred Embodiment Six

In a wireless system, there are two channel bandwidths, 540MHz and 1080MHz. The preamble field and signaling field of the radio frame sent by the station use the 540MHz bandwidth, and use the agreed format for transmission. The preamble field is used for time-frequency domain synchronization. , channel estimation, automatic gain control, etc., the signaling domain carries the bandwidth information used in the subsequent auxiliary information domain and data domain, which is indicated as 1080MHz in this embodiment, and the signaling domain also carries the modulation used in the subsequent auxiliary information domain and data domain. The technology indication information may indicate the OFDM modulation technology or the single-carrier modulation technology, and this embodiment indicates the single-carrier modulation. In this radio frame, the auxiliary information field and the data field are carried behind the signaling field, and the two fields use the single-carrier modulation technology and occupy a bandwidth of 1080MHz.

Preferred Embodiment Seven

In a wireless system, there are two channel bandwidths, 540MHz and 1080MHz. The preamble field and signaling field of the radio frame sent by the station use the 540MHz bandwidth, and use the agreed format for transmission. The preamble field is used for time-frequency domain synchronization. , channel estimation, automatic gain control, etc., the signaling domain carries the bandwidth information used in the subsequent auxiliary information domain and data domain, which is indicated as 1080MHz in this embodiment, and the signaling domain also carries the modulation used in the subsequent auxiliary information domain and data domain. Technical indication information, which can be used to indicate the modulation technology used in the subsequent auxiliary information field and data field by different values. For example, a value of 0 indicates that the subsequent auxiliary information field and data field both use OFDM modulation technology, and a value of 1 indicates that the subsequent auxiliary information field and data field use OFDM modulation technology. Both the auxiliary information domain and the data domain use single-carrier modulation technology, and the value of 2 indicates that the auxiliary information domain adopts single-carrier modulation technology and the data domain adopts OFDM modulation technology. The auxiliary information domain and the data domain are carried behind the let domain. The auxiliary information domain adopts the single-carrier modulation technology and the data domain adopts the OFDM modulation technology. The two domains occupy a bandwidth of 1080MHz.

Preferred Embodiment Eight

In a wireless system, there are two channel bandwidths, 540MHz and 1080MHz. The preamble field and signaling field of the radio frame sent by the station use the 540MHz bandwidth, and use the agreed format for transmission. The preamble field is used for time-frequency domain synchronization. , channel estimation, automatic gain control, etc. The signaling domain carries the bandwidth information used in the subsequent auxiliary information field and the data field and the modulation technology used respectively, which can be indicated by different values. For example, a value of 0 indicates the subsequent auxiliary information. Both domain and data domain use OFDM modulation technology and use 540MHz bandwidth; a value of 1 means that subsequent auxiliary information domain and data domain both use single-carrier modulation technology and use 540MHz bandwidth; a value of 2 means that auxiliary information domain uses a single carrier Modulation technology and data domain using OFDM modulation technology, and using 540MHz bandwidth; a value of 3 means that the subsequent auxiliary information domain and data domain both use OFDM modulation technology, and use 1080MHz bandwidth; a value of 4 means that the subsequent auxiliary information domain and data domain Both use single-carrier modulation technology and use 1080MHz bandwidth; the value of 5 means that the auxiliary information domain uses single-carrier modulation technology and the data domain uses OFDM modulation technology, and uses 1080MHz bandwidth; the value of 7 means that only the data domain exists, and its data The domain adopts single-carrier modulation and uses a bandwidth of 540MHz; assuming that the value in this embodiment is 2, in this wireless frame, the signaling domain carries the auxiliary information domain and the data domain, the auxiliary information domain adopts single-carrier modulation technology and the data domain adopts OFDM modulation technique, two domains occupy 540MHz bandwidth.

Obviously, those skilled in the art should understand that the above-mentioned modules or steps of the present invention can be implemented by a general-purpose computing device, which can be centralized on a single computing device, or distributed in a network composed of multiple computing devices Alternatively, they may be implemented in program code executable by a computing device, such that they may be stored in a storage device and executed by the computing device, and in some cases, in a different order than here The steps shown or described are performed either by fabricating them separately into individual integrated circuit modules, or by fabricating multiple modules or steps of them into a single integrated circuit module. As such, the present invention is not limited to any particular combination of hardware and software.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (8)

1. a kind of wireless frame sending method characterized by comprising

Determine radio frames, wherein the radio frames include: leading code domain, signaling domain, data field, alternatively, further including auxiliary information Domain, the signaling domain carry at least one of: being used to indicate the transmission auxiliary information domain and/or the data field is adopted First instruction information of bandwidth is used to indicate modulation technique used by the auxiliary information domain and/or the data field Second indication information；

The radio frames are sent according to the first instruction information and second indication information；

Wherein, in the case where the modulation technique used by the second indication information is used to indicate the data field, the letter Domain is enabled to carry the third instruction information for the modulation technique for being used to indicate the auxiliary information domain；

The first instruction information, second indication information, third indicate that at least two in information are present in the signaling domain Same instruction information field.

2. the method according to claim 1, wherein the auxiliary information domain and/or the data field are used Bandwidth include at least one of:

540MHz、1080MHz。

3. the method according to claim 1, wherein the auxiliary information domain and/or the data field are used Modulation technique include at least one of:

Single carrier modulation technique, multi-carrier modulation technology.

4. the method according to claim 1, wherein third instruction information is spatial flow in the signaling domain And/or the number of empty time stream.

5. method according to claim 1 to 4, which is characterized in that before the second indication information is carried on Leading code domain.

6. method according to claim 1 to 4, which is characterized in that using described in numerical value joint instructions first Indicate the mode of information and the second indication information to bandwidth used by the auxiliary information domain and/or the data field, Modulation technique used by the auxiliary information domain and/or the data field is indicated.

7. a kind of wireless frame transmission device characterized by comprising

Determining module, for determining radio frames, wherein the radio frames include: leading code domain, signaling domain, data field, alternatively, Further include auxiliary information domain, the signaling domain carries at least one of: be used to indicate send the auxiliary information domain and/or First instruction information of bandwidth used by the data field is used to indicate the auxiliary information domain and/or data field institute The second indication information of the modulation technique of use；

Sending module, for sending the radio frames according to the first instruction information and second indication information；

Wherein, in the case where the modulation technique used by the second indication information is used to indicate the data field, the letter Domain is enabled to carry the third instruction information for the modulation technique for being used to indicate the auxiliary information domain；

The first instruction information, second indication information, third indicate that at least two in information are present in the signaling domain Same instruction information field.

8. a kind of base station, which is characterized in that including device as claimed in claim 7.