CN106572198B

CN106572198B - Media access control packet header compression method, device and system

Info

Publication number: CN106572198B
Application number: CN201510671121.3A
Authority: CN
Inventors: 罗俊; 于健; 张佳胤
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2015-10-13
Filing date: 2015-10-13
Publication date: 2020-06-02
Anticipated expiration: 2035-10-13
Also published as: CN106572198A; WO2017063421A1

Abstract

The embodiment of the invention provides a method, a device and a system for compressing a media access control packet header. The MAC packet header compression method of the invention comprises the following steps: generating a Media Access Control (MAC) packet header, wherein the format of the MAC packet header is the MAC packet header format after the number of bytes occupied by the compressed MAC packet header is reduced; encapsulating the MAC packet header and the MAC frame body in a physical layer protocol data unit (PPDU); and sending the PPDU to at least one station STA. The embodiment of the invention compresses the number of bytes occupied by the MAC packet header by generating the MAC packet header, reduces the address overhead of the MAC packet header and improves the system efficiency.

Description

Media access control packet header compression method, device and system

Technical Field

The present invention relates to communications technologies, and in particular, to a method, an apparatus, and a system for compressing a media access control packet header.

Background

With the development of the mobile internet and the popularization of the intelligent terminal, the data traffic shows a explosive growth trend. Wireless Local Area Network (WLAN) is one of the mainstream mobile broadband Access technologies today due to its advantages in terms of high speed and low cost, and the contents of the packet header of the related protocol, Institute of Electrical and Electronics Engineers (IEEE) 802.11ac and 802.11n are shown in fig. 1, where Address (Address)1 represents a Receiving Address (RA), Address 2 represents a Transmitting Address (TA), Address 3 represents a source Address, and Address 4 represents a destination Address, each of which occupies 6 bytes.

In order to improve the utilization rate of time-Frequency resources, an Orthogonal Frequency Division Multiple Access (OFDMA) technology is introduced into a protocol ieee802.11ax of a next-generation WLAN system, and an Access Point (AP) may perform uplink and downlink transmission with different Stations (STA) on different time-Frequency resources.

However, if the MAC headers specified in ieee802.11ac and 802.11n are continuously used in the WLAN system introduced with the OFDMA technology, since the AP schedules a plurality of STAs at the same time, a plurality of sets of RA and TA will appear in the MAC header, which increases the address overhead of the MAC header and affects the system performance.

Disclosure of Invention

The embodiment of the invention provides a method, a device and a system for compressing a media access control packet header, which are used for reducing the address overhead of an MAC packet header and improving the system efficiency.

In a first aspect, an embodiment of the present invention provides a MAC header compression method, including:

generating a Media Access Control (MAC) packet header, wherein the format of the MAC packet header is the MAC packet header format after the number of bytes occupied by the compressed MAC packet header is reduced;

encapsulating the MAC packet header and the MAC frame body in a physical layer protocol data unit (PPDU);

and sending the PPDU to at least one station STA.

With reference to the first aspect, in a first possible implementation manner of the first aspect, a format of a MAC header of the PPDU includes: when the signaling portion of the PPDU includes the first identification information of the scheduled STA, the address portion in the MAC header does not include the reception address RA.

With reference to the first aspect, in a second possible implementation manner of the first aspect, a format of a MAC header of the PPDU includes: when the signaling part of the PPDU includes the first identification information of the scheduled STA, the address part in the MAC header does not include the transmission address TA.

With reference to the first aspect, in a third possible implementation manner of the first aspect, a format of the MAC header of the PPDU includes: when the signaling portion of the PPDU includes the second identification information of the scheduled STA, the address portion in the MAC header does not include the TA.

With reference to the first aspect, in a fourth possible implementation manner of the first aspect, the generating the MAC header includes:

and when the MAC frame body comprises a plurality of subframes, generating a MAC packet header used for indicating the plurality of subframes, wherein each subframe comprises one MAC packet header.

With reference to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, a format of the MAC header of the PPDU includes:

the address parts in the MAC packet headers of all the subframes do not comprise RA; alternatively, the first and second electrodes may be,

the address parts in the MAC packet headers of all the subframes do not comprise TA; alternatively, the first and second electrodes may be,

the address part in the MAC packet header of the first subframe does not comprise RA, and the address parts in the MAC packet headers of other subframes do not comprise TA and RA; alternatively, the first and second electrodes may be,

the address part in the MAC packet header of the first subframe does not comprise TA, and the address parts in the MAC packet headers of other subframes do not comprise TA and RA.

With reference to the first or second possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the first identification information includes an association identifier AID or a group identifier GID.

With reference to the third possible implementation manner of the first aspect, in a seventh possible implementation manner of the first aspect, the second identification information includes a partial association identification PAID.

In a second aspect, an embodiment of the present invention provides a MAC header compression method, including:

receiving a physical layer protocol data unit (PPDU), wherein the PPDU comprises a signaling part and a Medium Access Control (MAC) packet header;

and determining whether to demodulate the PPDU or not according to the signaling part, the address part in the MAC packet header and the local MAC address.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the determining whether to demodulate the PPDU according to the signaling part, an address part in the MAC header, and a local MAC address includes:

determining a receiving address RA of the PPDU according to the identification information of the scheduled STA in the signaling part and the address part in the MAC packet header;

and determining whether to demodulate the PPDU according to the RA and the local MAC address of the PPDU.

With reference to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the signaling portion includes first identification information of a scheduled STA, and an address portion in the MAC header does not include an RA.

With reference to the second aspect or the first possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, the signaling portion includes first identification information of a scheduled STA, and an address portion in the MAC header does not include a transmission address TA.

With reference to the second aspect or the first possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, the signaling portion includes second identification information of a scheduled STA, and an address portion in the MAC header does not include a TA.

With reference to the second aspect or the first possible implementation manner of the second aspect, in a fifth possible implementation manner of the second aspect, the PPDU includes a MAC header of at least one subframe;

the address part in the MAC packet header of the subframe does not comprise TA; alternatively, the first and second electrodes may be,

the address part in the MAC packet header of the subframe does not comprise RA; alternatively, the first and second electrodes may be,

With reference to the second or third possible implementation manner of the second aspect, in a sixth possible implementation manner of the second aspect, the first identification information includes an association identifier AID or a group identifier GID.

With reference to the fourth possible implementation manner of the second aspect, in a seventh possible implementation manner of the second aspect, the second identification information includes a partial association identification PAID.

In a third aspect, an embodiment of the present invention provides an AP, including:

the packet header generating module is used for generating a Media Access Control (MAC) packet header, wherein the format of the MAC packet header is the MAC packet header format after the number of bytes occupied by the compressed MAC packet header;

the encapsulation module is used for encapsulating the MAC packet header and the MAC frame body in a physical layer protocol data unit (PPDU);

and the sending module is used for sending the PPDU to at least one station STA.

With reference to the third aspect, in a first possible implementation manner of the third aspect, a format of a MAC header of the PPDU includes: when the signaling portion of the PPDU includes the first identification information of the scheduled STA, the address portion in the MAC header does not include the reception address RA.

With reference to the third aspect, in a second possible implementation manner of the third aspect, a format of the MAC header of the PPDU includes: when the signaling part of the PPDU includes the first identification information of the scheduled STA, the address part in the MAC header does not include the transmission address TA.

With reference to the third aspect, in a third possible implementation manner of the third aspect, a format of the MAC header of the PPDU includes: when the signaling portion of the PPDU includes the second identification information of the scheduled STA, the address portion in the MAC header does not include the TA.

With reference to the third aspect, in a fourth possible implementation manner of the third aspect, the packet header generating module is specifically configured to generate a MAC packet header for indicating multiple subframes when the MAC frame body includes multiple subframes, where each subframe includes one MAC packet header.

With reference to the fourth possible implementation manner of the third aspect, in a fifth possible implementation manner of the third aspect, a format of the MAC header of the PPDU includes:

With reference to the first or second possible implementation manner of the third aspect, in a sixth possible implementation manner of the third aspect, the first identification information includes an association identifier AID or a group identifier GID.

With reference to the third possible implementation manner of the third aspect, in a seventh possible implementation manner of the third aspect, the second identification information includes a partial association identification PAID.

In a fourth aspect, an embodiment of the present invention provides an STA, including:

a receiving module, configured to receive a physical layer protocol data unit PPDU, where the PPDU includes a signaling part and a media access control MAC header;

and the determining module is used for determining whether to demodulate the PPDU or not according to the signaling part, the address part in the MAC packet header and the local MAC address.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the determining module is specifically configured to determine a receiving address RA of the PPDU according to identification information of a scheduled STA in the signaling portion and an address portion in the MAC header; and determining whether to demodulate the PPDU according to the RA and the local MAC address of the PPDU.

With reference to the fourth aspect or the first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect, the signaling portion includes first identification information of a scheduled STA, and an address portion in the MAC header does not include an RA.

With reference to the fourth aspect or the first possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the signaling portion includes first identification information of a scheduled STA, and an address portion in the MAC header does not include a transmission address TA.

With reference to the fourth aspect or the first possible implementation manner of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, the signaling portion includes second identification information of a scheduled STA, and an address portion in the MAC header does not include a TA.

With reference to the fourth aspect or the first possible implementation manner of the fourth aspect, in a fifth possible implementation manner of the fourth aspect, the PPDU includes a MAC header of at least one subframe;

With reference to the second or third possible implementation manner of the fourth aspect, in a sixth possible implementation manner of the fourth aspect, the first identification information includes an association identifier AID or a group identifier GID.

With reference to the fourth possible implementation manner of the fourth aspect, in a seventh possible implementation manner of the fourth aspect, the second identification information includes a partial association identification PAID.

In a fifth aspect, an embodiment of the present invention provides an AP, including:

the processor is used for generating a Media Access Control (MAC) packet header, and the format of the MAC packet header is the MAC packet header format after the number of bytes occupied by the compressed MAC packet header; encapsulating the MAC packet header and the MAC frame body in a physical layer protocol data unit (PPDU);

a transmitter for transmitting the PPDU to at least one station STA.

With reference to the fifth aspect, in a first possible implementation manner of the fifth aspect, a format of the MAC header of the PPDU includes: when the signaling portion of the PPDU includes the first identification information of the scheduled STA, the address portion in the MAC header does not include the reception address RA.

With reference to the fifth aspect, in a second possible implementation manner of the fifth aspect, a format of the MAC header of the PPDU includes: when the signaling part of the PPDU includes the first identification information of the scheduled STA, the address part in the MAC header does not include the transmission address TA.

With reference to the fifth aspect, in a third possible implementation manner of the fifth aspect, a format of the MAC header of the PPDU includes: when the signaling portion of the PPDU includes the second identification information of the scheduled STA, the address portion in the MAC header does not include the TA.

With reference to the fifth aspect, in a fourth possible implementation manner of the fifth aspect, the processor is specifically configured to generate a MAC header for indicating multiple subframes when the MAC frame body includes multiple subframes, where each subframe includes one MAC header.

With reference to the fourth possible implementation manner of the fifth aspect, in a fifth possible implementation manner of the fifth aspect, a format of the MAC header of the PPDU includes:

With reference to the first or second possible implementation manner of the fifth aspect, in a sixth possible implementation manner of the fifth aspect, the first identification information includes an association identifier AID or a group identifier GID.

With reference to the third possible implementation manner of the fifth aspect, in a seventh possible implementation manner of the fifth aspect, the second identification information includes a partial association identification PAID.

In a sixth aspect, an embodiment of the present invention provides an STA, including:

a receiver, configured to receive a physical layer protocol data unit PPDU, where the PPDU includes a signaling part and a media access control MAC header;

and the processor is used for determining whether to demodulate the PPDU or not according to the signaling part, the address part in the MAC packet header and the local MAC address.

With reference to the sixth aspect, in a first possible implementation manner of the sixth aspect, the processor is specifically configured to determine a receiving address RA of the PPDU according to identification information of a scheduled STA in the signaling portion and an address portion in the MAC header; and determining whether to demodulate the PPDU according to the RA and the local MAC address of the PPDU.

With reference to the sixth aspect or the first possible implementation manner of the sixth aspect, in a second possible implementation manner of the sixth aspect, the signaling part includes first identification information of a scheduled STA, and an address part in the MAC header does not include an RA.

With reference to the sixth aspect or the first possible implementation manner of the sixth aspect, in a third possible implementation manner of the sixth aspect, the signaling portion includes first identification information of a scheduled STA, and an address portion in the MAC header does not include a transmission address TA.

With reference to the sixth aspect or the first possible implementation manner of the sixth aspect, in a fourth possible implementation manner of the sixth aspect, the signaling portion includes second identification information of a scheduled STA, and an address portion in the MAC header does not include a TA.

With reference to the sixth aspect or the first possible implementation manner of the sixth aspect, in a fifth possible implementation manner of the sixth aspect, the PPDU includes a MAC header of at least one subframe;

With reference to the second or third possible implementation manner of the sixth aspect, in a sixth possible implementation manner of the sixth aspect, the first identification information includes an association identifier AID or a group identifier GID.

With reference to the fourth possible implementation manner of the sixth aspect, in a seventh possible implementation manner of the sixth aspect, the second identification information includes a partial association identification PAID.

In a seventh aspect, an embodiment of the present invention provides a communication system, including: an Access Point (AP) and at least one Station (STA), wherein the AP is the AP described in any one of the first to seventh possible implementations of the third aspect and the third aspect, and the STA is the STA described in any one of the first to seventh possible implementations of the fourth aspect and the fourth aspect.

In an eighth aspect, an embodiment of the present invention provides a communication system, including: an Access Point (AP) and at least one Station (STA), wherein the AP is the AP according to any one of the first to seventh possible implementations of the fifth aspect and the fifth aspect, and the STA is the STA according to any one of the first to seventh possible implementations of the sixth aspect and the sixth aspect.

According to the method, the device and the system for compressing the media access control packet header, the MAC packet header is generated, the number of bytes occupied by the MAC packet header is compressed, the address overhead of the MAC packet header is reduced, and the system efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 shows the contents of the MAC header specified in ieee802.11ac and 802.11 n;

fig. 2 is a schematic diagram of an application scenario of the MAC header compression method according to the present invention;

FIG. 3 is a flowchart of an embodiment of a MAC packet header compression method according to the invention;

FIG. 4 is a frame structure diagram of a PPDU;

FIG. 5 is another frame structure diagram of a PPDU;

FIG. 6 is a schematic diagram of yet another frame structure of a PPDU;

FIG. 7 is a diagram of a fourth frame structure of a PPDU;

fig. 8 is a flowchart of another embodiment of the MAC header compression method of the present invention;

FIG. 9 is a schematic structural diagram of an embodiment of an AP according to the present invention;

fig. 10 is a schematic structural diagram of an embodiment of an STA according to the present invention;

fig. 11 is a schematic structural diagram of another embodiment of an AP of the present invention;

fig. 12 is a schematic structural diagram of another embodiment of an STA according to the present invention;

fig. 13 is a schematic structural diagram of an embodiment of the communication system of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 2 is a schematic view of an application scenario of the MAC header compression method of the present invention, and as shown in fig. 2, the application scenario of the present embodiment is a WLAN system introduced with OFDMA technology, and the WLAN system includes an AP 10 and four STAs 20 (i.e., STA1, STA2, STA3, and STA 4). The AP 10 may encapsulate the MAC header and the MAC frame generated by the MAC header compression method in a Physical Layer Protocol Data Unit (PPDU), and send the PPDU to at least one STA 20.

Fig. 3 is a flowchart of an embodiment of a MAC header compression method according to the present invention, and as shown in fig. 3, the method of this embodiment may include:

step 101, generating an MAC packet header, wherein the format of the MAC packet header is the MAC packet header format after compressing the number of bytes occupied by the MAC packet header;

in a protocol ieee802.11ax of a next-generation WLAN system, an AP may include a Physical Layer Convergence Protocol (PLCP) header field and a data field in a downlink PPDU sent to an STA, where the PLCP header field includes a preamble and a control field, where the control field includes a high efficiency signaling (HE-SIG) HE-SIGA and HE-SIGB, and the HE-SIGB includes uplink and/or downlink time-frequency resource indication information of the AP to multiple scheduled STAs. The STA can acquire the time-frequency resource indication information used by the STA for uplink and/or downlink transmission by receiving and decoding the HE-SIGB information in the PPDU.

In this embodiment, the AP may compress an address portion in the MAC header based on the identification information of the scheduled STA indicated by the HE-SIGB in the PPDU, and only transmit the TA or the RA in the MAC header, thereby effectively reducing the address overhead of the MAC header. After receiving the PPDU, the STA may determine the RA of the PPDU by combining the identification information of the scheduled STA indicated by the HE-SIGB in the PPDU and the address part in the MAC header.

The format of the MAC header is the MAC header format after compressing the number of bytes occupied by the MAC header, and may be a format stored in the AP in advance. As shown in fig. 1, the existing MAC header format includes TA and RA, which requires 12 bytes in total, and if one of the TA and RA is compressed, the address portion in the compressed MAC header can occupy 6 bytes less, thereby greatly reducing the address overhead of the MAC header.

102, encapsulating the MAC packet header and the MAC frame body in a PPDU;

and step 103, sending the PPDU to at least one station STA.

The AP sends a PPDU encapsulating a MAC header and a MAC frame body, which may be received by at least one STA.

In this embodiment, by generating the MAC header and compressing the number of bytes occupied by the MAC header, the address overhead of the MAC header is reduced, and the system efficiency is improved.

The following describes in detail the technical solution of the embodiment of the method shown in fig. 3, using several specific embodiments.

Fig. 4 is a schematic diagram of a frame structure of a PPDU, as shown in fig. 4, this embodiment is a frame format of a downlink PPDU, an Association Identity (AID) or a Group Identity (GID) of a scheduled STA may be included in a signaling part HE-SIGB of the PPDU, the scheduled STA in fig. 4 includes STA1, STA2, and STA3, the HE-SIGB includes AIDs of the scheduled STAs and indicates each scheduled STA to receive downlink data on time-frequency resources of a certain frequency band (different frequency bands are indicated by patterns in a box in the drawing), and an address part in the MAC header does not include an RA (address 1) but includes only a TA (address 2).

AID is the only identification information of STA in a Basic Service Set (BSS for short), after a plurality of STAs receive PPDU, whether the STAs belong to the PPDU can be determined according to AID of the scheduled STAs in HE-SIGB; one BSS only includes one AP, so that an identifier (BSSID) of the BSS may be used as an address identifier of the AP that the BSS includes, that is, a TA in a PPDU sent by the AP may be represented by a BSSID (TA ═ BSSID), after the STA considers that the STA is scheduled, the STA may determine which AP in the BSS sends the PPDU according to the TA of the address part in the MAC header, and may uniquely determine whether an actual receiving STA specified by the AP is itself by combining with the BSSID to which the STA belongs, thereby determining whether the PPDU needs to be demodulated.

Fig. 5 is a schematic diagram of another frame structure of a PPDU, and as shown in fig. 5, this embodiment is a frame format of a downlink PPDU, where an AID or a GID of a scheduled STA may be included in a signaling portion HE-SIGB of the PPDU, where the scheduled STA in fig. 5 includes STA1, STA2, and STA3, where the HE-SIGB includes the AIDs of the scheduled STAs and indicates that each scheduled STA receives downlink data on time-frequency resources of a certain frequency band (different frequency bands are indicated by a pattern in a box in the drawing), an address portion in the MAC header does not include a TA (address 2), includes only an RA (address 1), and correspondingly indicates a received STA in a frequency band allocated to each scheduled STA.

The AID is the only identification information of the STA in one BSS, and after a plurality of STAs receive the PPDU, whether the STAs belong to the BSS can be determined according to the AID of the scheduled STAs in the HE-SIGB; after considering that the STA is scheduled, the STA may uniquely determine whether the actual receiving STA specified by the AP is itself according to the RA of the address part in the MAC header in combination with the MAC address of the STA, and further determine whether the PPDU needs to be demodulated.

Fig. 6 is a schematic diagram of still another frame structure of a PPDU, and as shown in fig. 6, this embodiment is a partial frame format of a downlink PPDU, a Partial Association Identity (PAID) of a scheduled STA may be included in a signaling part HE-SIGB of the PPDU, the scheduled STA in fig. 6 includes STA1, STA2 and STA3, the HE-SIGB includes PAIDs of the scheduled STAs, and indicates each scheduled STA to receive downlink data on time-frequency resources of a certain frequency band (different frequency bands are indicated by patterns in a box in the drawing), an address part in the MAC header does not include TA (address 2), and RA (address 1) indicates a corresponding received STA in a frequency band allocated to each scheduled STA.

PAID is identification information of STAs in one BSS, and because PAID is not unique, a plurality of STAs (even more than two STAs in the same BSS) may determine that the PAID belongs to the BSS according to the scheduled STAs in HE-SIGB after receiving the PPDU; at this time, after the STA considers that it is scheduled, it uniquely determines whether the actual receiving STA designated by the AP is itself according to the RA of the address part in the MAC header in combination with its MAC address, and further determines whether it needs to demodulate the PPDU.

In the embodiments shown in fig. 4 to fig. 6, after receiving the PPDU, a plurality of STAs may perform primary screening according to a basic service set color (BSS color) in the HE-SIGA, and if a certain STA determines that the BSS color in the HE-SIGA is not owned, which indicates that the PPDU does not belong to the BSS to which the STA belongs, the STA directly discards the PPDU and does not demodulate the PPDU.

Fig. 7 is a schematic diagram of a fourth frame structure of the PPDU, as shown in fig. 7, when a MAC frame body includes a plurality of subframes, an AP correspondingly generates a MAC header for indicating the plurality of subframes, each subframe includes one MAC header, the AP encapsulates the MAC header and the MAC frame body corresponding to the plurality of subframes in a downlink aggregate media access control protocol Data Unit (aggregate media access control Data Unit, abbreviated as AMPDU), and an address portion in the MAC header corresponding to each subframe in the AMPDU may not include a TA but only includes an RA; alternatively, RA may not be included, only TA; or, the address part in the MAC header of the first subframe may not include RA, but only include TA, while the address parts in the MAC headers of other subframes do not include TA and RA; alternatively, the address part in the MAC header of the first subframe may not include TA, but only include RA, while the address part in the MAC header of the other subframes may not include TA and RA. Fig. 7 illustrates an example in which the address part in the MAC header of all subframes of the AMPDU does not include TA.

Further, the AP may also specify a format of the MAC header, and address portions in the MAC headers of different subframes may compress different address information, for example, the address portion in the MAC header of the odd-numbered subframe does not include RA, and the address portion in the MAC header of the even-numbered subframe does not include TA.

Fig. 8 is a flowchart of another embodiment of the MAC header compression method of the present invention, as shown in fig. 8, the method of this embodiment may include:

step 201, receiving a PPDU, where the PPDU includes a signaling part and a MAC header;

this embodiment corresponds to the method embodiment shown in fig. 2, and the execution subject is STA.

Step 202, determining whether to demodulate the PPDU according to the signaling part, the address part in the MAC header and the local MAC address.

The STA may determine the actual receiving address of the PPDU specified by the AP according to the identification information of the scheduled STA in the signaling part in the PPDU and the address part in the MAC header by the method described in the above method embodiment, and then determine whether to demodulate the PPDU according to the actual receiving address and the local MAC address.

Corresponding to the above embodiments, the signaling part in the PPDU received by the STA may include the first identification information of the scheduled STA, and the address part in the MAC header may not include the RA. Or, the signaling part includes first identification information of a scheduled STA, and the address part in the MAC header does not include a transmission address TA. Or, the signaling part includes second identification information of the scheduled STA, and the address part in the MAC header does not include the TA. The first identification information includes an AID or a GID, and the second identification information includes a PAID.

And the AMPDU received by the STA may include a MAC header of at least one subframe; the address part in the MAC header of the subframe does not include TA, or the address part in the MAC header of the subframe does not include RA, or the address part in the MAC header of the first subframe does not include RA, and the address parts in the MAC headers of other subframes do not include TA and RA, or the address part in the MAC header of the first subframe does not include TA, and the address parts in the MAC headers of other subframes do not include TA and RA.

Fig. 9 is a schematic structural diagram of an embodiment of an AP of the present invention, and as shown in fig. 9, the apparatus of this embodiment may include: the media access control device comprises a packet header generating module 11, an encapsulating module 12 and a sending module 13, wherein the packet header generating module 11 is used for generating a Media Access Control (MAC) packet header, and the format of the MAC packet header is the MAC packet header format after the number of bytes occupied by the MAC packet header is compressed; an encapsulating module 12, configured to encapsulate the MAC header and the MAC frame body in a physical layer protocol data unit PPDU; a sending module 13, configured to send the PPDU to at least one station STA.

The apparatus of this embodiment may be used to implement the technical solution of the method embodiment shown in fig. 3, and the implementation principle and the technical effect are similar, which are not described herein again.

Further, the format of the MAC header of the PPDU includes: when the signaling portion of the PPDU includes the first identification information of the scheduled STA, the address portion in the MAC header does not include the reception address RA.

Further, the format of the MAC header of the PPDU includes: when the signaling part of the PPDU includes the first identification information of the scheduled STA, the address part in the MAC header does not include the transmission address TA.

Further, the format of the MAC header of the PPDU includes: when the signaling portion of the PPDU includes the second identification information of the scheduled STA, the address portion in the MAC header does not include the TA.

Further, the packet header generating module 11 is specifically configured to generate a MAC packet header for indicating a plurality of subframes when the MAC frame body includes the plurality of subframes, where each subframe includes one MAC packet header.

Further, the format of the MAC header of the PPDU includes: the address parts in the MAC packet headers of all the subframes do not comprise RA; or, the address parts in the MAC headers of all the subframes do not include TA; or the address part in the MAC packet header of the first subframe does not comprise RA, and the address parts in the MAC packet headers of other subframes do not comprise TA and RA; or the address part in the MAC header of the first subframe does not include TA, and the address parts in the MAC headers of other subframes do not include TA and RA.

Further, the first identification information includes an association identification AID or a group identification GID.

Further, the second identification information includes a partial association identification PAID.

Fig. 10 is a schematic structural diagram of an embodiment of an STA according to the present invention, and as shown in fig. 10, the apparatus of this embodiment may include: a receiving module 21 and a determining module 22, where the receiving module 21 is configured to receive a physical layer protocol data unit PPDU, and the PPDU includes a signaling part and a media access control MAC header; a determining module 22, configured to determine whether to demodulate the PPDU according to the signaling part, the address part in the MAC header, and the local MAC address.

The apparatus of this embodiment may be used to implement the technical solution of the method embodiment shown in fig. 8, and the implementation principle and the technical effect are similar, which are not described herein again.

Further, the determining module 22 is specifically configured to determine the receiving address RA of the PPDU according to the identification information of the scheduled STA in the signaling part and the address part in the MAC header; and determining whether to demodulate the PPDU according to the RA and the local MAC address of the PPDU.

Further, the signaling part includes first identification information of a scheduled STA, and the address part in the MAC header does not include an RA.

Further, the signaling part includes first identification information of a scheduled STA, and the address part in the MAC header does not include a transmission address TA.

Further, the signaling part includes second identification information of the scheduled STA, and the address part in the MAC header does not include a TA.

Further, the PPDU includes a MAC header of at least one subframe; the address part in the MAC packet header of the subframe does not comprise TA; or, the address part in the MAC header of the subframe does not include RA; or the address part in the MAC packet header of the first subframe does not comprise RA, and the address parts in the MAC packet headers of other subframes do not comprise TA and RA; or the address part in the MAC header of the first subframe does not include TA, and the address parts in the MAC headers of other subframes do not include TA and RA.

Fig. 11 is a schematic structural diagram of another embodiment of an AP of the present invention, and as shown in fig. 11, the apparatus of this embodiment may include: the processor 31 is configured to generate a media access control MAC packet header, where a format of the MAC packet header is a MAC packet header format after compressing the number of bytes occupied by the MAC packet header; encapsulating the MAC packet header and the MAC frame body in a physical layer protocol data unit (PPDU); a transmitter 32, configured to transmit the PPDU to at least one station STA.

Further, the processor 31 is specifically configured to generate a MAC header indicating a plurality of subframes when the MAC frame body includes the plurality of subframes, where each subframe includes one MAC header.

Fig. 12 is a schematic structural diagram of another embodiment of an STA according to the present invention, and as shown in fig. 12, the apparatus of this embodiment may include: a receiver 41 and a processor 42, where the receiver 41 is configured to receive a physical layer protocol data unit PPDU, and the PPDU includes a signaling part and a media access control MAC header; a processor 42, configured to determine whether to demodulate the PPDU according to the signaling part, the address part in the MAC header, and the local MAC address.

Further, the processor 42 is specifically configured to determine a receiving address RA of the PPDU according to the identification information of the scheduled STA in the signaling part and an address part in the MAC header; and determining whether to demodulate the PPDU according to the RA and the local MAC address of the PPDU.

Fig. 13 is a schematic structural diagram of an embodiment of a communication system of the present invention, and as shown in fig. 13, the system of the present embodiment includes: an AP and at least one STA, where the AP may adopt the structure of the apparatus embodiment shown in fig. 9, and correspondingly, may execute the technical solution of the method embodiment shown in fig. 3, and its implementation principle and technical effect are similar, and are not described herein again; the STA may adopt the structure of the apparatus embodiment shown in fig. 10, and accordingly, may execute the technical solution of the method embodiment shown in fig. 8, and the implementation principle and the technical effect are similar, which are not described herein again.

Further, in the system structure diagram shown in fig. 13, the AP may also adopt the structure of the apparatus embodiment shown in fig. 11, and accordingly, the technical solution of the method embodiment shown in fig. 3 may be executed, and the implementation principle and the technical effect are similar, which are not described herein again; the STA may also adopt the structure of the apparatus embodiment shown in fig. 12, and accordingly, may execute the technical solution of the method embodiment shown in fig. 8, which has similar implementation principles and technical effects, and is not described herein again.

Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A Media Access Control (MAC) packet header compression method is characterized by comprising the following steps:

generating a Media Access Control (MAC) packet header, wherein the format of the MAC packet header is the MAC packet header format after the number of bytes occupied by the compressed MAC packet header is compressed, and the MAC packet header does not comprise a receiving address RA or a sending address TA;

encapsulating the MAC packet header and the MAC frame body in a physical layer protocol data unit (PPDU), wherein a signaling part in the PPDU comprises identification information of a scheduled Station (STA);

and sending the PPDU to at least one station STA, wherein the identification information and the address included in the MAC packet header are used for the STA to determine whether to demodulate the PPDU.

2. The method of claim 1, wherein a format of the MAC header of the PPDU comprises: when the signaling portion of the PPDU includes the first identification information of the scheduled STA, the address portion in the MAC header does not include the reception address RA.

3. The method of claim 1, wherein a format of the MAC header of the PPDU comprises: when the signaling part of the PPDU includes the first identification information of the scheduled STA, the address part in the MAC header does not include the transmission address TA.

4. The method of claim 1, wherein a format of the MAC header of the PPDU comprises: when the signaling portion of the PPDU includes the second identification information of the scheduled STA, the address portion in the MAC header does not include the TA.

5. The method of claim 1, wherein the generating the MAC header comprises:

6. The method of claim 5, wherein the format of the MAC header of the PPDU comprises:

7. The method according to claim 2 or 3, wherein the first identification information comprises an association identification AID or a group identification GID.

8. The method of claim 4, wherein the second identification information comprises a Partial Association Identification (PAID).

9. A Media Access Control (MAC) packet header compression method is characterized by comprising the following steps:

receiving a physical layer protocol data unit (PPDU), wherein the PPDU comprises a signaling part and a Medium Access Control (MAC) packet header, and the MAC packet header does not comprise a receiving address RA or a sending address TA;

10. The method of claim 9, wherein the signaling portion comprises first identification information of a scheduled STA, and wherein the address portion in the MAC header does not comprise an RA.

11. The method of claim 9, wherein the signaling portion comprises first identification information of a scheduled STA, and wherein the address portion in the MAC header does not comprise a transmission address TA.

12. The method of claim 9, wherein the signaling portion comprises second identification information of the scheduled STA, and wherein the address portion in the MAC header does not comprise a TA.

13. The method of claim 9, wherein the PPDU comprises a MAC header for at least one subframe;

14. The method according to claim 10 or 11, wherein the first identification information comprises an association identification AID or a group identification GID.

15. The method of claim 12, wherein the second identification information comprises a Partial Association Identification (PAID).

16. An access point, AP, comprising:

the media access control system comprises a packet header generating module, a receiving module and a transmitting module, wherein the packet header generating module is used for generating a Media Access Control (MAC) packet header, the format of the MAC packet header is the MAC packet header format after the number of bytes occupied by the compressed MAC packet header is compressed, and the MAC packet header does not comprise a receiving address RA or a transmitting address TA;

an encapsulation module, configured to encapsulate the MAC header and the MAC frame in a physical layer protocol data unit PPDU, where a signaling part in the PPDU includes identification information of a scheduled station STA;

a sending module, configured to send the PPDU to at least one station STA, where the identification information and an address included in the MAC header are used by the STA to determine whether to demodulate the PPDU.

17. The AP of claim 16, wherein a format of the MAC header of the PPDU comprises: when the signaling portion of the PPDU includes the first identification information of the scheduled STA, the address portion in the MAC header does not include the reception address RA.

18. The AP of claim 16, wherein a format of the MAC header of the PPDU comprises: when the signaling part of the PPDU includes the first identification information of the scheduled STA, the address part in the MAC header does not include the transmission address TA.

19. The AP of claim 16, wherein a format of the MAC header of the PPDU comprises: when the signaling portion of the PPDU includes the second identification information of the scheduled STA, the address portion in the MAC header does not include the TA.

20. The AP of claim 16, wherein the packet header generating module is specifically configured to generate a MAC packet header indicating a plurality of subframes when the MAC frame body includes the plurality of subframes, wherein each subframe includes one MAC packet header.

21. The AP of claim 20, wherein a format of the MAC header of the PPDU comprises:

22. The AP of claim 17 or 18, wherein the first identification information comprises an association identification, AID, or a group identification, GID.

23. The AP of claim 19, wherein the second identification information comprises a partial association identification, PAID.

24. A Station (STA), comprising:

a receiving module, configured to receive a physical layer protocol data unit PPDU, where the PPDU includes a signaling part and a media access control MAC header; the MAC packet header does not comprise a receiving address RA or a sending address TA;

a determining module, configured to determine a receiving address RA of the PPDU according to identification information of a scheduled STA in the signaling part and an address part in the MAC header; and determining whether to demodulate the PPDU according to the RA and the local MAC address of the PPDU.

25. The STA of claim 24, wherein the signaling portion comprises first identification information of a scheduled STA, and wherein the address portion in the MAC header does not comprise an RA.

26. The STA of claim 24, wherein the signaling portion comprises first identification information of a scheduled STA, and wherein the address portion in the MAC header does not include a transmission address TA.

27. The STA of claim 24, wherein the signaling portion includes second identification information of the scheduled STA, and wherein the address portion in the MAC header does not include a TA.

28. The STA of claim 24, wherein the PPDU comprises a MAC header for at least one subframe;

29. The STA of claim 25 or 26, wherein the first identification information comprises an association identification, AID, or a group identification, GID.

30. The STA of claim 27, wherein the second identification information comprises a partial association identification, PAID.

31. An access point, AP, comprising:

the processor is used for generating a Media Access Control (MAC) packet header, and the format of the MAC packet header is the MAC packet header format after the number of bytes occupied by the compressed MAC packet header; encapsulating the MAC packet header and the MAC frame body in a physical layer protocol data unit (PPDU); the MAC packet header does not comprise a receiving address RA or a sending address TA, and a signaling part in the PPDU comprises identification information of a scheduled station STA;

a sender, configured to send the PPDU to at least one station STA, where the identification information and an address included in the MAC header are used by the STA to determine whether to demodulate the PPDU.

32. The AP of claim 31, wherein a format of the MAC header of the PPDU comprises: when the signaling portion of the PPDU includes the first identification information of the scheduled STA, the address portion in the MAC header does not include the reception address RA.

33. The AP of claim 31, wherein a format of the MAC header of the PPDU comprises: when the signaling part of the PPDU includes the first identification information of the scheduled STA, the address part in the MAC header does not include the transmission address TA.

34. The AP of claim 31, wherein a format of the MAC header of the PPDU comprises: when the signaling portion of the PPDU includes the second identification information of the scheduled STA, the address portion in the MAC header does not include the TA.

35. The AP of claim 31, wherein the processor is configured to generate a MAC header indicating a plurality of subframes when the MAC frame body comprises the plurality of subframes, wherein each subframe comprises a MAC header.

36. The AP of claim 35, wherein the format of the MAC header of the PPDU comprises:

37. The AP of claim 32 or 33, wherein the first identification information comprises an association identification, AID, or a group identification, GID.

38. The AP of claim 34, wherein the second identification information comprises a partial association identification, PAID.

39. A Station (STA), comprising:

a receiver, configured to receive a physical layer protocol data unit PPDU, where the PPDU includes a signaling part and a media access control MAC header; the MAC packet header does not comprise a receiving address RA or a sending address TA;

a processor, configured to determine a receiving address RA of the PPDU according to identification information of a scheduled STA in the signaling part and an address part in the MAC header; and determining whether to demodulate the PPDU according to the RA and the local MAC address of the PPDU.

40. The STA of claim 39, wherein the signaling portion includes first identification information of a scheduled STA, and wherein the address portion in the MAC header does not include the RA.

41. The STA of claim 39, wherein the signaling portion includes first identification information of the scheduled STA, and wherein the address portion in the MAC header does not include a Transmit Address (TA).

42. The STA of claim 39, wherein the signaling portion includes second identification information of the scheduled STA, and wherein the address portion in the MAC header does not include the TA.

43. The STA of claim 39, wherein the PPDU comprises a MAC header for at least one subframe;

44. The STA of claim 40 or 41, wherein the first identification information comprises an Association Identification (AID) or a Group Identification (GID).

45. The STA of claim 42, wherein the second identification information comprises a Partial Association Identification (PAID).

46. A communication system, comprising: an Access Point (AP) and at least one Station (STA), wherein the AP is the AP of any one of claims 16-23, and the STA is the STA of any one of claims 24-30.

47. A communication system, comprising: an Access Point (AP) and at least one Station (STA), wherein the AP is the AP of any one of claims 31-38, and the STA is the STA of any one of claims 39-45.