WO2016177089A1 - 资源指示的处理方法、处理装置、接入点和站点 - Google Patents

资源指示的处理方法、处理装置、接入点和站点 Download PDF

Info

Publication number
WO2016177089A1
WO2016177089A1 PCT/CN2016/076000 CN2016076000W WO2016177089A1 WO 2016177089 A1 WO2016177089 A1 WO 2016177089A1 CN 2016076000 W CN2016076000 W CN 2016076000W WO 2016177089 A1 WO2016177089 A1 WO 2016177089A1
Authority
WO
WIPO (PCT)
Prior art keywords
random access
trigger frame
subchannel
information
transmission
Prior art date
Application number
PCT/CN2016/076000
Other languages
English (en)
French (fr)
Inventor
郭宇宸
林梅露
于健
杨讯
刘乐
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2016177089A1 publication Critical patent/WO2016177089A1/zh
Priority to US16/124,971 priority Critical patent/US10993259B2/en

Links

Images

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA

Definitions

  • the present invention relates to the field of wireless communication technologies and, more particularly, to a method, an access point, and a station for transmitting information.
  • WLAN Wireless Local Area Network
  • Orthogonal Frequency Division Multiplexing OFDM
  • OFDMA Orthogonal Frequency Division Multiple Access
  • OFDMA technology supports multiple nodes to simultaneously send and receive data.
  • the resource allocation is performed based on the RB or the RB group; different channel resources are allocated to different STAs at the same time, so that multiple STAs access the channel efficiently, thereby improving channel utilization.
  • For an OFDMA-based WLAN system it is necessary to efficiently indicate communication resources to STAs.
  • Embodiments of the present invention provide a method for transmitting information, and a corresponding processing device, such as an access point and a station, capable of efficiently indicating a communication resource to a station.
  • a method for sending a resource indication including:
  • the access point generates a trigger frame, where the trigger frame includes: information (I1) for indicating whether the trigger frame allows random access transmission;
  • the access point sends the trigger frame.
  • a resource indication receiving method including
  • the station Receiving, by the station, a trigger frame, where the trigger frame includes information (I1) for indicating whether the trigger frame allows random access transmission;
  • the station uses the random access resource indicated by the trigger frame to perform random access transmission.
  • a method for sending a resource indication including:
  • the access point generates a trigger frame, where the trigger frame includes: information indicating the number of subchannels used for random access (I3); or, indicating the total number of resource units RU for random access. Information (I4);
  • the access point sends the trigger frame.
  • a resource indication receiving method including
  • the station receives a trigger frame, where the trigger frame includes: information indicating the number of subchannels used for random access (I3); or information indicating a total number of resource units RU for random access ( I4);
  • the station uses the random access resource indicated by the trigger frame to perform random access transmission.
  • a method for sending a resource indication including:
  • the access point generates a trigger frame, where the trigger frame includes: a subchannel allocation field, configured to indicate multiple subchannels into which the entire bandwidth is divided; and, used to indicate that the subchannel allocation field is divided into subchannels Information for a subchannel for random access (I6);
  • the access point sends the trigger frame.
  • a resource indication receiving method including
  • the station receives the trigger frame, and the trigger frame includes: a subchannel allocation field, which is used to indicate that the whole Multiple subchannels divided into bandwidths; and,
  • the station uses the random access resource indicated by the trigger frame to perform random access transmission.
  • a method for sending a resource indication including:
  • the access point generates a trigger frame, where the trigger frame includes: a subchannel allocation field, configured to indicate a plurality of subchannels into which the entire bandwidth is divided; and a user information portion, configured to allocate, for the subchannel, a portion indicated by the field a subchannel indicating configuration information of each of the partial subchannels; wherein, among the plurality of subchannels indicated by the subchannel allocation field, there is no remaining partial subchannel indicating configuration information in the user information portion For random access;
  • the access point sends the trigger frame.
  • a resource indication receiving method including
  • the station receives a trigger frame, where the trigger frame includes: a subchannel allocation field, configured to indicate a plurality of subchannels into which the entire bandwidth is divided; and a user information portion, configured to allocate, for the subchannel, a partial subchannel indicated by the field And indicating configuration information of each of the partial subchannels, wherein, among the plurality of subchannels indicated by the subchannel allocation field, there is no remaining partial subchannel indicating configuration information in the user information portion, For random access;
  • the station uses the random access resource indicated by the trigger frame to perform random access transmission.
  • a method for sending a resource indication including:
  • the access point generates a trigger frame, where the trigger frame includes: a subchannel allocation field, which is used to indicate multiple subchannels into which the entire bandwidth is divided; and a user information part, which is used to allocate each sub-channel in the subchannel allocation field.
  • a subchannel allocation field which is used to indicate multiple subchannels into which the entire bandwidth is divided
  • a user information part which is used to allocate each sub-channel in the subchannel allocation field.
  • Channel indicating that each of the subchannels will be scheduled for transmission or random access transmission, and configured to schedule configuration information during transmission, or for random use The number of RUs occupied by each random access channel when accessing the transmission;
  • the access point sends the trigger frame.
  • a resource indication receiving method including
  • the station receives a trigger frame, where the trigger frame includes: a subchannel allocation field for indicating a plurality of subchannels into which the entire bandwidth is divided; and a user information portion for each subchannel allocated in the subchannel allocation field, Instructing each of the subchannels to schedule transmission or random access transmission, and configuration information used for scheduling transmission, or the number of RUs occupied by each random access channel for random access transmission;
  • the station uses the random access resource indicated by the trigger frame to perform random access transmission.
  • embodiments of the present invention also provide corresponding devices, such as chips, access points, or sites, that can perform the foregoing methods.
  • the communication resources that can be used for random access can be indicated to the site efficiently, which facilitates the use of the site, and some embodiments can save some communication resources.
  • FIG. 1a is a schematic diagram of a system architecture applicable to an embodiment of the present invention.
  • FIG. 1b is a schematic flowchart of an applicable embodiment of the present invention.
  • FIG. 2 is a schematic diagram of a physical layer trigger frame in accordance with an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a MAC layer trigger frame according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a trigger frame according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of subchannel allocation information according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of resource block allocation in accordance with an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of subchannel allocation in accordance with an embodiment of the present invention.
  • Figure 16 is a diagram showing the position of a subchannel according to an embodiment of the present invention.
  • FIG 17 is a block diagram of an access point in accordance with an embodiment of the present invention.
  • Figure 18 is a block diagram of a station in accordance with an embodiment of the present invention.
  • An Access Point which can also be called a wireless access point or bridge or hotspot, can access a server or a communication network.
  • a station which may also be referred to as a user, may be a wireless sensor, a wireless communication terminal, or a mobile terminal, such as a mobile phone (or "cellular" phone) that supports WiFi communication functions and a computer with wireless communication capabilities.
  • a mobile phone or "cellular" phone
  • it may be a portable, pocket-sized, handheld, computer-built, wearable, or in-vehicle wireless communication device that supports WiFi communication functions, and exchanges communication data such as voice and data with the wireless access network.
  • FIG. 1a is a simplified schematic diagram of a WLAN system to which an embodiment of the present invention is applied.
  • the system of Figure 1a includes one or more access points AP 101 and one or more stations STA 102.
  • the OFDMA technology is used for wireless communication between the access point 101 and the site 102.
  • the trigger frame sent by the access point 101 includes indication information for the communication resources of the station 102 or the site group.
  • an embodiment of the present invention provides a method for resource indication
  • the WLAN is configured to use the OFDMA technology
  • the access point AP constructs (or generates) a triggering frame, where the triggering frame includes: information for indicating a random access resource, and the specific structure may refer to subsequent implementation manners.
  • an OFDMA transmission is a multi-user transmission.
  • a trigger frame transmitted by an AP includes subchannel allocation information and a user information part.
  • the subchannel allocation information is used to divide the entire channel into subchannels
  • the user information part is used to allocate a specific subchannel to a specific user (for scheduling transmission)
  • a particular subchannel allocation is used for random access transmission (ie, any user can transmit on that subchannel).
  • the trigger frame mentioned in each embodiment of the present disclosure may be a physical layer trigger frame or a MAC layer trigger frame.
  • the trigger frame is used to trigger an OFDMA transmission.
  • the physical layer trigger frame for example, it is an NDP frame with only the physical layer preamble and no MPDU (ie, MAC layer protocol data unit) part.
  • the physical layer trigger frame includes two parts: legacy preamble and HE preamble, and the efficient preamble includes four parts: HE-SIG A, HE-SIG B, HE-STF, and HE-LTF.
  • the trigger signaling of the trigger frame is located in the HE-SIG B of the HE preamble of the physical layer preamble.
  • the MAC layer trigger frame For the MAC layer trigger frame, it includes a physical layer preamble and an MPDU, wherein the MPDU further includes a MAC header and a payload. As shown in FIG. 3, the trigger signaling of the trigger frame is located in the payload of the MPDU.
  • the trigger signaling includes a common information portion and a user information portion located after the common information portion, as shown in FIG.
  • the common information part contains common information for all users, such as subchannel allocation information, or transmission parameters such as bandwidth.
  • the subchannel allocation information is mainly used to indicate a plurality of subchannels into which the entire bandwidth is divided; the user information part is configuration information for each subchannel, and each subchannel has a corresponding piece of user information for indicating
  • the subchannels allocated in the subchannel assignment field will Information about which site or group of sites to transmit and the corresponding transmission parameters.
  • the subchannel allocation information divides the entire bandwidth into 4 subchannels, and the user information portion will include 4 pieces of user information, corresponding to each subchannel.
  • the user information part contains information such as the user's identity and transmission parameters, such as MCS, or spatial stream.
  • the station After receiving the trigger frame, the station first reads the public information part, and then reads the user information part if necessary.
  • subchannel allocation information is not necessary for each embodiment, for the sake of clarity of the description, the subchannel allocation information will be described in detail below.
  • subchannel allocation is performed based on a minimum communication resource unit for transmission, a resource unit (RU), in other words, one or more consecutive resource units RU form a subchannel, and in actual transmission, for each A subchannel allocates a site or group of stations on which the subchannel is transmitted.
  • the frequency band in which one or more RUs allocated by one station or group of stations is called a subchannel.
  • the RU mentioned in the present invention refers to a subcarrier group composed of several subcarriers.
  • the RU is a subcarrier group composed of 26 subcarriers.
  • a 20 MHz bandwidth channel includes 9 resource units (RUs), and the subchannel allocation information includes 9 bits, and each bit is used to indicate a channel of 20 MHz bandwidth for the split information for the 9 RUs. It is divided into several subchannels, each of which occupies one or more RUs. For example, referring to FIG. 5, an example of assigning information to one subchannel: "001101111". As shown in the left side of FIG. 5, each bit represents the following meaning: the first two 0s indicate that the first two RUs form one subchannel, and the next two 1s indicate that the third and fourth RUs form a subchannel. The next 0 indicates that the fifth RU forms a subchannel, and the last four 1 indicates that the last four RUs form a subchannel, as shown on the right side of FIG.
  • a corresponding user information part is required to indicate user parameter information, including the ID of the user (the ID of the station or the site group), and the transmission parameters such as the MCS or the number of streams, and the like. There are no restrictions on specific parameters.
  • 802.11ax uses 26 subcarriers as one resource block. As shown in Figure 6, taking 20M bandwidth as an example, 802.11ax has 256 DFT/IDFT points in the data symbol portion. That is, there are 256 subcarriers, where subcarriers -1, 0, 1 are direct current (DC), left side subcarriers -122 to subcarrier-2, and right side subcarrier 2 to subcarrier 122 are used to carry data information. That is, there are 242 subcarriers used to carry data information. Subcarrier-128 to subcarrier-123 and subcarrier 123 to subcarrier 128 are guard bands.
  • each resource block is 26 subcarriers, and 8 unused subcarriers remain.
  • the nine resource blocks occupy subcarrier-122 to subcarrier-97 (resource block 1), subcarrier-95 to subcarrier-70 (resource block 2), and subcarrier-68 to sub-portion, respectively.
  • Carrier-43 (Resource Block 3), Subcarrier-41 to Subcarrier-16 (Resource Block 4), Subcarrier-14 to Subcarrier 14 (Resource Block 5), Subcarrier 16 to Subcarrier 41 (Resource Block (Resource) Block 6), subcarrier 43 to subcarrier 68 (resource block 7), subcarrier 70 to subcarrier 95 (resource block 8), subcarrier 97 to subcarrier 122 (resource block 9), and the remaining 8 are unused
  • the subcarriers are subcarriers -96, -69, -42, -15, 15, 42, 69, 96, respectively, referred to herein as a set of spare subcarriers.
  • 802.11ax divides resource blocks (subchannel allocation) as follows. Taking a 20M bandwidth communication channel as an example, there are only 1*26, 2*26, 4*26, 242 resource blocks of four sizes. .
  • the 20 MHz bandwidth block diagram ie, the subchannel allocation map
  • the middle 1*26 is across the DC
  • the DC subcarrier is the middle slot in the figure.
  • the first layer is a 1*26 map
  • the second layer is a 2*26 and 1*26 map
  • the third layer is a 4*26 and 1*26 map
  • the fourth layer is a 242 map.
  • a 20 MHz subchannel allocation map can be used to combine any subchannels of the three layers into a spectrum or channel of 242 subcarrier sizes, and each user can only allocate one of the subchannels.
  • the common information portion of the trigger frame includes an indication information bit for indicating that all subchannels divided by the subchannel allocation field are used for random access. For example, referring to FIG. 8, if the bandwidth of the entire OFDMA transmission is 20 MHz, a total of 9 RUs are included. If The subchannel allocation field divides the 9 RUs on the 20 MHz bandwidth into 4 subchannels, occupying 2, 2, 1 and 4 RUs, respectively. When the indication information bit included in the trigger frame is 1, it indicates that the four subchannels are all used for random access, that is, four random access subchannels, occupying 2, 2, 1 and 4 RUs respectively. When the indication information bit is 0, it indicates that the four subchannels are not all used for random access, that is, partially used for random access or all cannot be used for random access.
  • the user information part of the trigger frame includes an indication information bit for each user (station or group of sites) for indicating that the subchannel corresponding to the user information part is available. For random access. As shown in FIG. 9, if the bandwidth of the entire OFDMA transmission is 20 MHz, a total of 9 RUs are included. If the subchannel allocation field divides the 9 RUs on the 20 MHz bandwidth into 4 subchannels, occupying 2, 2, 1 and 4 RUs respectively, the user information part of the trigger frame contains 4 pieces of user information. For each user information, the indication information bit of 1 indicates that the subchannel is used for random access, and the indication information bit of 0 indicates that the subchannel is not used for random access (ie, for scheduling transmission). As shown in FIG. 9, the first subchannel (occupying 2 RUs) and the third subchannel (accounting for 1 RU) are used for random access, and the remaining subchannels are used for scheduling transmission.
  • the subchannel allocation field needs to occupy a large signaling overhead, and each subchannel needs to be separately indicated to indicate whether it is used for random access, and the efficiency is low.
  • a preferred trigger frame structure includes a first indication information I1 for indicating whether the trigger frame allows random access transmission.
  • the first indication information I1 for example, is a trigger random access transmission indication bit, referred to as a TFR indicator bit. If the first indication information I1 is 1, the trigger frame allocates resources for random access; if the first indication information I1 is 0, the trigger frame does not allocate resources for random access (ie, all The transmission bandwidth is used to schedule transmissions). After receiving the trigger frame, the site needs to perform random access, but the TFR indicator bit is 0, and can stop reading subsequent information of the trigger frame, thereby reducing waste of processing resources of the site.
  • the trigger frame further includes second indication information I2, Indicates whether the entire transmission bandwidth is used for random access.
  • the second indication information I2 is, for example, referred to as a “contention indication” indication bit, and the indication bit is 1 indicating that the entire transmission bandwidth is used for random access, and 0 indicates that the partial transmission channel is used for random access.
  • the entire transmission bandwidth is used for random access and part of the transmission bandwidth is used for random access.
  • the entire transmission bandwidth is used for random access.
  • the subchannel allocation information located in the public information part
  • the user information part are not included, so that communication resources can be further saved.
  • the first indication information I1 (TFR indication bit) may be included in the embodiment, and the second indication information I2 (contention indication indication bit) is not included.
  • the TFR indicator bit and the contention indication indicator bit are not tightly coupled.
  • the first indication information I1 here is different from the function of indicating the information bits in the embodiment shown in FIG.
  • a trigger frame is used when the first indication information I1 (TFR indicator bit) is 1, and the second indication information I2 (contention indication indicator bit) is 0, that is, a part of the transmission channel used for random access. Trigger frame.
  • the specific indication frame may not include the first indication information I1 (TFR indication bit), or the second indication information I2 (contention indication indication bit), or the first indication information I1 (TFR indication) Bit) and second indication information I2 (contention indication indicator bit).
  • the trigger frame sent by the AP includes a subchannel allocation field.
  • the subchannel allocation field is used to indicate a plurality of subchannels into which the entire bandwidth is divided.
  • the trigger frame includes third indication information I3, which is used to indicate the number of subchannels used for random access. It may be referred to as a random access subchannel information field "sub-channel number for random access”.
  • the trigger frame may further include a fifth indication information I5, which is used to indicate the number N of RUs occupied by each random access subchannel, and may be referred to as a random access RU information field “RU number of random access sub-channel” ".
  • the value of N is 1 or 2 or 4 or 9.
  • the subchannel position for random access is relatively fixed, that is, a continuous RU occupying the beginning or the end of the entire frequency band.
  • the value of the random access subchannel information field "sub-channel number for random access” is M
  • the value of the random access RU information field "RU number of random access sub-channel” is N
  • RU is the M*N RUs of the beginning or the end of the entire frequency band or channel.
  • the RU used for random access is The first 3 RUs of the entire channel, or the 3 RUs at the end.
  • the trigger frame does not include the third sub-channel number for random access information field, but includes fourth indication information for indicating
  • the total number of randomly accessed RUs may be referred to as the random access total RU information field "RU number for random access”. That is, the trigger frame includes fourth indication information and the fifth indication information I5.
  • the station that receives the trigger frame determines a subchannel location for random access according to the foregoing trigger frame, and randomly accesses and transmits on the relevant subchannel.
  • the subchannel for random access occupies consecutive T RUs at the beginning or the end of the entire frequency band
  • the RU used for random access includes a RU of a special location (such as the RU in the middle of the 20 MHz bandwidth shown in FIG. 3)
  • the RU of the special location is regarded as a single random access subchannel; for other RUs, It is divided sequentially, each random access subchannel occupies consecutive N RUs, and if the remaining RUs are found to be insufficient to form a continuous N RUs in the process of partitioning, then it is regarded as an independent random access subchannel. .
  • the above-mentioned fifth indication information I5 may not be included in the trigger frame in FIG. 11a and FIG. 11b.
  • the number of RUs occupied by each subchannel used for random access The default value is, for example, 1 RU or 2 RU.
  • the sub-channel allocation field in the common information part of the trigger frame may be allocated only for other RUs, for example, FIG. 11a has been used. There are 3 sub-channels that are indicated as random access. For a 20 MHz channel occupying 9 RUs, the sub-channel allocation field can occupy only 6 bits, that is, the allocation of the remaining 6 RUs can be realized, so that The signaling overhead of the subchannel allocation field is reduced to some extent.
  • the first indication information I1 (TFR indicator bit) is 1, and the second indication information I2 (contention indication indicator bit) is 0, that is, when the partial transmission channel is used for random access Another trigger frame.
  • the first indication information I1 (TFR indication bit) or the second indication information I2 (contention indication indication bit) may not be included, or the first indication information I1 (TFR) is not included in the trigger frame.
  • the trigger frame sent by the AP includes a subchannel allocation field, which is used to indicate a number of subchannels into which the entire bandwidth is divided.
  • the sixth indication information I6 is included in the trigger frame, and is used to indicate which one (or which) of the subchannels divided by the subchannel allocation field is used for random access. .
  • it may be referred to as a random access subchannel location information field "sub-channel location for random access” in FIG. 12a, specifically indicating that the first subchannel is used for random access (I6-1).
  • it may be referred to as a “sub-channel bitmap for random access” in FIG. 12b, and the bitmap is specifically used to indicate whether each subchannel is used for random access (I6- 2).
  • the AP divides the entire bandwidth (in the example of 20 MHz) into three subchannels by using a subchannel allocation field, and each subchannel occupies 4, 1, and 4 RUs, respectively.
  • the value of the "sub-channel location for random access" information field is 3 (or binary representation is 011), indicating that the third subchannel is used for random access.
  • the AP divides the entire bandwidth (in the example of 20 MHz) into three subchannels by using a subchannel allocation field, and each subchannel occupies 4, 1, and 4 RUs, respectively.
  • the value of the "sub-channel bitmap for random access” information field is "001", indicating that the third subchannel is used for random access.
  • the triggering frame may also include the fifth indication information I5 mentioned above as shown in FIGS. 12b and 12c for indicating the number of RUs occupied by each subchannel used for random access.
  • the fifth indication information I5 shown in FIG. 12b and FIG. 12c has a number of RUs occupied by each subchannel for random access.
  • the fifth indication information I5 (random access RU information field) may be not included.
  • the number of RUs occupied by each subchannel used for random access is a default value, for example, 1 RU.
  • the common part of the trigger frame does not include subchannel allocation information, and the subchannel allocation information is located in the user information part, and the subchannel allocation information will be used to allocate a subchannel for the corresponding user. transmission.
  • a separate indication may also be used to indicate that the user information portion will allocate one or more subchannels for random access.
  • a bitmap information may be included in the user information portion of the trigger frame, and the bitmap information may be the seventh indication information I7, the bitmap The information is used to indicate whether each minimum RU is used for random access, and 1 can be used to indicate that the corresponding minimum RU is used for random access. A 0 is used to indicate that the corresponding minimum RU is not used for random access. It can also be said that the embodiment does not limit this.
  • the minimum RU refers to an RU including 26 subcarriers.
  • the length of the bitmap information is related to the bandwidth of the uplink multi-user transmission triggered by the trigger frame. If the uplink multi-user transmission bandwidth is 20 MHz and the uplink multi-user transmission includes 9 minimum RUs, the bitmap information is The length is 9 bits, and each bit indicates whether the corresponding RU is used for random access. If the bandwidth of the uplink multi-user transmission is larger, the length of the bitmap information is longer, which is equal to the number of minimum RUs included in the bandwidth of the uplink multi-user transmission. Specifically, the length of the bitmap information corresponding to 40 MHz is 18 bits, and the length of the bitmap information corresponding to 80 MHz is 37 bits, and the length of the bitmap information corresponding to 160 MHz is 74 bits.
  • the part includes the eighth indication information I8, which is used to indicate the number of minimum RUs occupied by each random access subchannel.
  • the subchannel is used for random access.
  • the user information part includes the seventh indication information I7, that is, the bitmap information, and specifically indicates whether each RU is used for random access by means of a bitmap.
  • a user information part of the trigger frame includes a special AID, indicating that the user information part contains bitmap information, and each bit in the bitmap is used to indicate each corresponding Whether RU is used for random access. Since the bandwidth is 20 MHz, the length of the bitmap is 9 bits. The value of the bitmap is 110101000, indicating that the 1, 2, 4, and 6 RUs are allocated for random access.
  • the bitmap of the first layer may be in units of 20 MHz.
  • 8 bits may be used to indicate whether or not RUs of the corresponding 8 20 MHz are allocated for random access. It can be represented by 1 and 0 means no.
  • the bitmap of the second layer can be corresponding to the corresponding one in the first layer bitmap. These 20 MHz are further indicated, and each 20 MHz corresponds to 9 bits, and each bit specifically indicates whether each RU is used for random access.
  • the bitmap of the first layer is “10100000” indicating that RUs in the first and third 20 MHz are allocated for random access.
  • the bitmap of the second layer is specifically indicated for the first and third 20 MHz.
  • the bitmap of the second layer is "111101011110010000", indicating that the first, second, third, fourth, sixth, eighth, and nine RUs in the first 20 MHz and the first, second, and fifth RUs in the second 20 MHz are Allocation is used for random access.
  • first layer bitmap and/or the second layer bitmap may also be replaced by an indication information field, respectively, indicating the number of 20 MHz including the random access RU and the random access for each 20 MHz.
  • the specific location may be a number of consecutive 20 MHz and several RUs fixed in front.
  • the indication information may be included in the trigger frame to indicate whether the layered bitmap is used.
  • the indication information may be located in a common information part of the trigger frame or in a user information part.
  • the user information part may not include the bitmap information, but includes the ninth indication information I9, and the I9 is used to indicate the number of RUs for random access.
  • the RU for random access may be a consecutive number of RUs starting from the first RU, or may be consecutive RUs counting back from the last RU.
  • the 10th indication information I10 may be included in the user information part, where the I10 is used to indicate a starting position of the RU for random access.
  • the 8th indication information I8 may also be included in the user information part to indicate the number of minimum RUs occupied by each random access subchannel.
  • the subchannel is used for random access.
  • the user information part further includes a ninth indication information I9, and the I9 is used. Indicates the number of RUs used for random access. For example, the value of I9 is K indicating that the first K (or the last K) RUs are for random access.
  • the above description provides two possible implementation manners, the first one uses bitmap information, and the second uses number information, as shown in Figure 12d and Figure 12e, respectively. Show. These two methods have their own advantages. The first one is more flexible and the second one is less expensive.
  • the 11th indication information I11 may be included in the trigger frame to indicate whether the trigger frame is in the first embodiment or the second mode.
  • the indication information I11 may be located in a common information part of the trigger frame or in a user information part.
  • the trigger frame generated and transmitted by the AP includes a subchannel allocation field, which is used to indicate a number of subchannels obtained by dividing the entire bandwidth.
  • the trigger frame further includes a user information portion for indicating, for a part of the foregoing allocated subchannels, information about which one or which users (sites or group groups) the subchannel will be used for, for which no allocation indication or scheduling indication is made. Part of the subchannel, the default is for random access transmission.
  • the number of user information in the user information part is smaller than the number of subchannels in the subchannel allocation field, and those subchannels that are not allocated or instructing user information are defaulted to be used for random access.
  • the station After receiving the trigger frame, the station parses the subchannel allocation field and the user information part, and if the station is assigned a subchannel, transmits on the allocated subchannel, if no subchannel is allocated, it needs to be randomly connected. When the transmission is performed, the subchannels to which the user information is not allocated may be randomly accessed for transmission.
  • the trigger frame (such as the common information part) further includes a fifth indication information I5, that is, a RU information of random access sub-channel, which is used to indicate each random connection. Number of RUs occupied by the incoming channel.
  • the subchannel allocation of the trigger frame is for a 20 MHz bandwidth (9 RUs).
  • the entire bandwidth is divided into 4 subchannels, which occupy 2, 2, 1 and 4 RUs respectively.
  • the user information part of the trigger frame has only 3 pieces of user information.
  • the receiving station confirms that the three pieces of user information in the user information part are user information for the first three subchannels according to the above trigger frame, and the fourth subchannel (including 4 RUs) is used for random access by default. If the value of the information field "RU number of random access sub-channel" is 2, the 4th subchannel will be further divided into 2 random access subchannels, and each random access subchannel occupies 2 RUs.
  • TFR and contention indication in FIG. 13 are optional fields.
  • the trigger frame transmitted by the AP (for example, the common information part) includes a subchannel allocation field, which is used to divide the entire channel into several subchannels. Or, to indicate a number of subchannels in which the entire channel is divided.
  • a user information part is further included for indicating, for each subchannel allocated in the subchannel allocation field, whether it will schedule transmission or random access transmission, and information about which station or group of stations to transmit when scheduling transmission and corresponding
  • the transmission parameter ie, configuration information
  • each user information part of the trigger frame may include a “sub-channel contention indication” indication bit to indicate whether the sub-channel is used for random access.
  • the user information part may include: a RU information of random access sub-channel, which is used to indicate the occupation of each random access channel. RU number. In this way, the RU information field of the random access subchannel can be used. When the number indicated by the information field is greater than 1, the subchannel is further divided into multiple random access subchannels, and the station is performing.
  • the random access uses one of a plurality of random access subchannels for transmission. In addition, it can also be in the User Information Department.
  • the sub-group includes a user group information field "group ID" for indicating a group of users that can perform random access on the corresponding sub-channel.
  • group ID a user group information field for indicating a group of users that can perform random access on the corresponding sub-channel.
  • TFR and Contention Indication fields are optional fields.
  • the scheduled transmission can be effectively aligned with the random access transmission.
  • the long time occupied by scheduling transmission in (1) we can allocate fewer RUs to the random access channel, so that the random access transmission also takes a long time similar to the scheduled transmission; 2) The shorter time occupied by the scheduled transmission, we can allocate more RUs to the random access channel, so that the random access transmission also occupies a shorter time similar to the scheduled transmission, and if we give random access at this time If the channel is allocated less RUs, the random access transmission will take a long time. In order to achieve the alignment of the transmission, padding bits need to be added after the scheduling transmission, and part of the channel resources are wasted.
  • the OFDMA transmission in the embodiment of the present invention may include multiple time periods, and frequency resources on each time period may be allocated to multiple users (sites or group of stations) for transmission.
  • the foregoing various embodiments do not relate to the problem of the time period.
  • the foregoing embodiments may also be applied to the case of multiple time periods, that is, the trigger frame includes an indication of the transmission time period and the corresponding time. An indication of the random access subchannel of the segment or the scheduled subchannel.
  • the foregoing multiple transmission time periods and indications of corresponding communication resources may be implemented in multiple manners.
  • the trigger frame includes: the number of time segments in the current transmission, and the sequentially arranged indications of the random access subchannels or the scheduled subchannels for the respective time segments.
  • the trigger frame includes: an identifier of a time period in the current transmission that is sequentially arranged, and an indication of the identified random access subchannel or the scheduled subchannel for the time period.
  • the AP sends a trigger frame, and triggers 5 STAs to transmit respectively in two time periods.
  • the spectrum resources of the first time period are allocated to STA1 and STA2, and the spectrum resources of the second time period are allocated to STA3 and STA4.
  • the preferred trigger frame structure mentioned above can be used to the preferred trigger frame structure 5, which will not be described here.
  • the above describes several preferred trigger frame structures.
  • 100 and AP generate and transmit the above trigger frame according to actual conditions.
  • the station receives the trigger frame and uses the communication resource indicated in the trigger frame for transmission.
  • the sub-channel for random access indicated in the trigger frame may be randomly accessed by the station (if it is not scheduled), and if no other station is also connected, the sub-channel may be used to complete the communication. transmission.
  • the process for the AP to generate and send the trigger frame according to the actual situation may include:
  • the AP determines the number of subchannels M for random access, or the AP determines the location of the subchannel used for random access, or the AP further determines the number of RUs required for each random access subchannel. (Or default to N RUs), generating a trigger frame based on the M or location determined above (or further based on N).
  • the “TFR” indication bit of the generated trigger frame is 1, otherwise the “TFR” indication bit is 0. .
  • the "TFR” indicator bit may not be included.
  • the generated trigger frame is The “contention indication” indicates that the bit is 1, otherwise the “contention indication” is 0.
  • the “contention indication” indicator bit may not be included.
  • the generated trigger frame includes a random access subchannel information field “sub-channel number for random access” ", and its value is M.
  • the generated trigger frame includes a random access total RU information field “RU number for random access” T.
  • the generated trigger frame includes the “RU number of random access sub-channel” information field according to the number of RUs required for each random access subchannel, and Its value is N.
  • the default triggering frame may not include the “RU number of random access sub-channel” if the default is required for each random access subchannel.
  • the AP includes a subchannel allocation field in the trigger frame (such as the common information part), and is used to indicate several subchannels of the entire bandwidth division; if M>0, the trigger frame includes Random access subchannel location information field "sub-channel location for random access” or random access subchannel bitmap information field "sub-channel bitmap for random” Access” indicates the location of the subchannel used for random access.
  • the AP includes a subchannel allocation field in the trigger frame (such as the common information part), and is used to indicate several subchannels of the entire bandwidth partition.
  • the trigger frame further includes a user information portion for indicating which user's information transmission the subchannel will be used for for the aforementioned assigned subchannel.
  • the M subchannels from the back to the top of the plurality of subchannels allocated by the subchannel allocation field may be used for random access, for corresponding use.
  • the subchannels that are randomly accessed do not make any indication in the user information part.
  • the AP includes a subchannel allocation field in the trigger frame (such as the common information part), and is used to indicate several subchannels of the entire bandwidth partition.
  • the trigger frame further includes a user information portion for indicating which user's information transmission the subchannel will be used for for the aforementioned assigned subchannel.
  • each user information part of the trigger frame includes a “sub-channel contention indication” indication bit, respectively, to indicate whether the subchannel is used for random access;
  • the user information part includes: the RU information field of the random access subchannel "RU number of random access sub- Channel", used to indicate the number of RUs occupied by each random access channel.
  • the receiving, by the station, the transmission frame and using the communication resource indicated in the trigger frame for transmission may include:
  • the triggering frame sent by the AP is read, and the location information of the subchannel available for random access indicated in the triggering frame is obtained, so as to be randomly accessed on the corresponding subchannel. And transfer.
  • the process of random access is not the focus of this embodiment, and will not be described here.
  • the process of obtaining the location information of the subchannels available for random access indicated in the trigger frame may have different processes depending on the structure of the trigger frame:
  • the transmitting STA after receiving the trigger frame, reads the "TFR" indication bit. If the indication bit is 1, the “contention indication” indication bit is further read.
  • TFR time since the trigger frame does not allocate resources for random access, and does not continue to acquire random access information. If the "contention indication” indication bit is 1, if the indication bit is 0, it indicates that the trigger frame does not allocate resources for random access.
  • the “contention indication” indication bit read in 201 is 1, that is, the entire transmission bandwidth is used for random access, then one subchannel may be randomly selected for random access.
  • the specific location of the subchannel may be determined by referring to the number of RUs occupied by the subchannel (ie, "RU number of random access sub-channel" information field) or according to the number of RUs occupied by the default subchannel.
  • the subchannel bandwidth occupied by each user is 1, 2, 4, or 9 RUs, so the value of N in step 203 is 1 or 2 or 4 or 9.
  • the RUs of some special locations can only be used as one subchannel for transmission, for example, an intermediate RU within a 20 MHz bandwidth. Therefore, when determining the location of the random access subchannel, generally, the RU of the special location is used as a separate random access subchannel, and other RUs are determined according to the value of N.
  • the intermediate RUs 5th RUs
  • the STA that requires random access randomly selects one subchannel for access in the five subchannels shown in FIG.
  • the STA reads the value M of the “sub-channel number for random access” information field in the trigger frame or further reads “RU number of random access sub-channel”.
  • the value of the information field N (which may default to L), and determine the location of the subchannel for random access according to the M and N: the subchannel for random access occupies the beginning or the end of the entire frequency band (for example, 20 MHz) Continuous M*N RUs, and in which the first or the last number
  • the i subchannels occupy the (i-1)*N+1th RU to the i*Nth RU.
  • the STA reads the “RU number for random access” T in the trigger frame, or further reads the value of the “RU number of random access sub-channel” information field.
  • the default is L
  • the location of the subchannel for random access is determined according to the M and N: the subchannel for random access occupies consecutive T RUs at the beginning or the end of the entire frequency band (for example, 20 MHz), if The RU for random access includes a RU of a special location (such as an intermediate RU of 20 MHz bandwidth), and the RU of the special location is regarded as a single random access subchannel; for other RUs, each random access sub The channel occupies consecutive N RUs. If the remaining RUs are found to be insufficient to form consecutive N RUs, the remaining RUs are regarded as independent random access subchannels.
  • the STA reads the “sub-channel location for random access” information field in the common information part of the trigger frame, or further according to the “RU number of random access sub-channel” information field.
  • N (which may default to L) determines the location of the subchannel used for random access. Specifically, the STA determines each subchannel for random access according to the "sub-channel location for random access" information field, and obtains the location of its starting RU (the first RU of the subchannel). If the location of the starting RU of a subchannel allocated for random access is S, and the value of the "RU number of random access sub-channel" information field is N, then the first random access subchannel is occupied.
  • the second subchannel occupies the S+N+1 to S+2N RUs, and so on. If the i-th sub-channel occupies the S+(i-1)*N+1 RUs to the S+i*N RUs, and the remaining RU number is greater than 0 and less than N, then all remaining RUs are used as a random access. Subchannel.
  • the STA reads the subchannel allocation field in the trigger frame read trigger frame (for example, the common information part), and determines the subchannel position and the number of subchannels indicated by the field.
  • the STA reads the user information part of the trigger frame, and determines how many pieces of user information the user information part contains. If the number of user information U included in the user information part is smaller than the number of sub-channels J divided by the sub-channel allocation field, the last J-U sub-channels are used for random access. Can enter one
  • the step reads the "RU number of random access sub-channel" information field (which may default to L) to determine the location of the subchannel for random access.
  • the STA may determine the sum of the number of RUs occupied by the subchannels used for scheduling transmission according to the subchannel allocation field and the user information part. If the sum of the number of RUs occupied by the subchannel used for scheduling transmission is S, and the value of the "RU number of random access sub-channel" information field is N, then the first random access subchannel occupies the S+1 Up to S+N RUs, the second subchannel occupies the S+N+1 to S+2N RUs, and so on.
  • the i-th sub-channel occupies the S+(i-1)*N+1 RUs to the S+i*N RUs, and the remaining RU number is greater than 0 and less than N, then all remaining RUs are used as a random access. Subchannel.
  • the STA user information part that needs to be randomly accessed and the sub-channel contention indication indication bit for the user information part corresponding to one subchannel, and Further "RU number of random access sub-channel" information field (located in the public information part or the user information part, or default to L), thereby determining the location of the subchannel for random access.
  • the STA reads all the user information parts, finds each subchannel for random access, and obtains the location of its starting RU.
  • the first The random access subchannel occupies the S+1th to the S+Nth RUs, the second subchannel occupies the S+N+1th to the S+2Nth RUs, and so on. If the i-th sub-channel occupies the S+(i-1)*N+1 RUs to the S+i*N RUs, and the remaining RU number is greater than 0 and less than N, then all remaining RUs are used as a random access. Subchannel.
  • each subchannel occupies 2, 2, 1 and 4 RUs respectively, and according to the indication of the indication information, the 1st and 4th subchannels
  • the value of the "RU number of random access sub-channel" information field in the user information corresponding to the first subchannel is "1”
  • the user information corresponding to the fourth subchannel is "RU number of random access sub”.
  • the value of the -channel" information field is 2, then the current allocation will generate 4 random access subchannels, the first random access subchannel occupies the first RU, and the second random access subchannel occupies the second RU, the third random access subchannel accounts for the 6th and 7th RUs, 4th The random access subchannels occupy the 8th and 9th RUs.
  • the STA that needs to be randomly accessed can read the information of the time period in the trigger frame, and the information of the subchannels of the random access for each time period, and confirm the corresponding time.
  • the location of the random access subchannel of the segment selects a subchannel for random access to access in a subchannel that can be randomly accessed in a corresponding time period.
  • a resource indication processing device (not shown) applied to a wireless local area network employing OFDMA technology, including a processing unit configured to transmit or receive the foregoing embodiments.
  • Trigger frame For the structure and content of the specific trigger frame, reference may be made to the foregoing embodiments, and details are not described herein again.
  • the processing unit may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or may implement or perform the embodiments of the present invention.
  • a general purpose processor can be a microprocessor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor. It is easy to understand that the processing device of the foregoing resource indication may be located at an access point when specifically transmitting the trigger frame, and may be located at a site when specifically receiving the trigger frame.
  • FIG 17 is a block diagram of an access point in accordance with another embodiment of the present invention.
  • the access point of Figure 17 includes an interface 101, a processing unit 102, and a memory 103.
  • Processing unit 102 controls the operation of access point 100.
  • Memory 103 can include read only memory and random access memory and provides instructions or data to processing unit 102.
  • a portion of the memory 103 may also include non-volatile line random access memory (NVRAM).
  • NVRAM non-volatile line random access memory
  • the various components of access point 100 are coupled together by a bus system 109, which in addition to the data bus includes a power bus, a control bus, and a status signal bus. However, for clarity of description, various buses are labeled as the bus system 109 in the figure.
  • the method for transmitting the foregoing various trigger frames disclosed in the foregoing embodiments of the present invention may be applied to the processing unit 102 or implemented by the processing unit 102.
  • the steps of the above method This can be done by an integrated logic circuit of hardware in the processing unit 102 or by instructions in software.
  • the processing unit 102 can be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, which can be implemented or executed in an embodiment of the invention.
  • a general purpose processor can be a microprocessor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 103, and the processing unit 102 reads the information in the memory 103 and completes the steps of the above method in combination with its hardware.
  • FIG. 18 is a block diagram of a station in accordance with another embodiment of the present invention.
  • the site of FIG. 18 includes an interface 111, a processing unit 112, and a memory 113.
  • Processing unit 112 controls the operation of site 110.
  • Memory 113 can include read only memory and random access memory and provides instructions and data to processing unit 112.
  • a portion of the memory 113 may also include non-volatile line random access memory (NVRAM).
  • NVRAM non-volatile line random access memory
  • the various components of the site 110 are coupled together by a bus system 119, which in addition to the data bus includes a power bus, a control bus, and a status signal bus. However, for clarity of description, various buses are labeled as bus system 119 in the figure.
  • the processing method for receiving the foregoing various trigger frames and according to the respective trigger frames disclosed in the foregoing embodiments of the present invention may be applied to the processing unit 112 or implemented by the processing unit 112.
  • each step of the above method may be completed by an integrated logic circuit of hardware in the processing unit 112 or an instruction in a form of software.
  • the processing unit 112 can be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, which can be implemented or executed in an embodiment of the invention.
  • a general purpose processor can be a microprocessor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • Software module can be bit In a random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers and the like in the field of mature storage media.
  • the storage medium is located in the memory 113, and the processing unit 112 reads the information in the memory 113 and performs the steps of the above method in combination with its hardware.
  • the memory 113 stores an instruction that causes the processing unit 112 to perform resource status information indicating a busy state of a sub-resource of a channel resource for which the access point performs data transmission with the station; sending to the access point Resource status information, so that the access point performs resource allocation according to resource status information.
  • system and “network” are used interchangeably herein.
  • the term “and/or” in this context is merely an association describing the associated object, indicating that there may be three relationships, for example, A and / or B, which may indicate that A exists separately, and both A and B exist, respectively. B these three situations.
  • the character "/" in this article generally indicates that the contextual object is an "or" relationship.
  • B corresponding to A means that B is associated with A, and B can be determined according to A.
  • determining B from A does not mean that B is only determined based on A, and that B can also be determined based on A and/or other information.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present invention.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the present invention can be implemented in hardware, firmware implementation, or a combination thereof.
  • the functions described above may be stored in or transmitted as one or more instructions or code on a computer readable medium.
  • the computer readable medium includes a computer storage medium and a communication medium, wherein the communication medium includes a computer program for facilitating transfer from one location to another Any medium.
  • a storage medium may be any available media that can be accessed by a computer.
  • computer readable media may comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage media or other magnetic storage device, or can be used for carrying or storing in the form of an instruction or data structure.
  • the desired program code and any other medium that can be accessed by the computer may suitably be a computer readable medium.
  • the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital STA line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable , fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, wireless, and microwave are included in the fixing of the associated media.
  • coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, wireless, and microwave are included in the fixing of the associated media.
  • a disk and a disc include a compact disc (CD), a laser disc, a compact disc, a digital versatile disc (DVD), a floppy disk, and a Blu-ray disc, wherein the disc is usually magnetically copied, and the disc is The laser is used to optically replicate the data. Combinations of the above should also be included within the scope of the computer readable media.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

一种资源指示的处理方法,应用于采用OFDMA技术的无线局域网,发送或者接收触发帧,所述触发帧包括:用于指示所述触发帧是否允许随机接入传输的信息(I1)。

Description

资源指示的处理方法、处理装置、接入点和站点 技术领域
本发明涉及无线通信技术领域,并且更具体地,涉及传输信息的方法、接入点和站点。
背景技术
随着移动互联网的发展和智能终端的普及,数据流量快速增长。无线局域网(WLAN,Wireless Local Area Network)凭借高速率和低成本方面的优势,成为主流的移动宽带接入技术之一。
为了大幅提升WLAN***的业务传输速率,下一代电气和电子工程师协会(IEEE,Institute of Electrical and Electronics Engineers)802.11ax标准将会在现有正交频分复用(OFDM,Orthogonal Frequency Division Multiplexing)技术的基础上,进一步采用正交频分多址(OFDMA,Orthogonal Frequency Division Multiple Access)技术。OFDMA技术将空口无线信道通信资源划分成多个正交的通信资源块(RB,Resource Block),RB之间在时间上可以是共享的,而在频域上是正交的。
OFDMA技术支持多个节点同时发送和接收数据。当接入点需要与站点传输数据时,基于RB或RB组进行资源分配;在同一时刻为不同的STA分配不同的信道资源,使多个STA高效地接入信道,提升信道利用率。对基于OFDMA的WLAN***而言,需要高效地向STA指示通信资源。
发明内容
本发明实施例提供了一种传输信息的方法、相应的处理装置,例如接入点和站点,能够高效地向站点指示通信资源。
一方面,提供了一种资源指示发送方法,包括:
接入点生成触发帧,所述触发帧包括:用于指示所述触发帧是否允许随机接入传输的信息(I1);
接入点发送所述触发帧。
另一方面,提供了一种资源指示接收方法,包括
站点接收触发帧,所述触发帧包括,用于指示该触发帧是否允许随机接入传输的信息(I1);
所述站点在需要进行随机接入传输时,使用所述触发帧指示的随机接入资源进行随机接入传输。
另一方面,提供了一种资源指示发送方法,包括:
接入点生成触发帧,所述触发帧包括:用于指示用于随机接入的子信道的数量的信息(I3);或者,用于指示用于随机接入的资源单元RU的总数量的信息(I4);
接入点发送所述触发帧。
另一方面,提供了一种资源指示接收方法,包括
站点接收触发帧,所述触发帧括:用于指示用于随机接入的子信道的数量的信息(I3);或者,用于指示用于随机接入的资源单元RU的总数量的信息(I4);
所述站点在需要进行随机接入传输时,使用所述触发帧指示的随机接入资源进行随机接入传输。
另一方面,提供了一种资源指示发送方法,包括:
接入点生成触发帧,所述触发帧包括:子信道分配字段,用于指示将整个带宽划分成的多个子信道;和,用于指示所述子信道分配字段所划分出的子信道中的用于随机接入的子信道的信息(I6);
所述接入点发送所述触发帧。
另一方面,提供了一种资源指示接收方法,包括
站点接收触发帧,所述触发帧括:子信道分配字段,用于指示将整 个带宽划分成的多个子信道;和,
用于指示所述子信道分配字段所划分出的子信道中的用于随机接入的子信道的信息(I6);
所述站点在需要进行随机接入传输时,使用所述触发帧指示的随机接入资源进行随机接入传输。
另一方面,提供了一种资源指示发送方法,包括:
接入点生成触发帧,所述触发帧包括:子信道分配字段,用于指示将整个带宽划分成的多个子信道;和,用户信息部分,用于针对所述子信道分配字段所指示的部分子信道,指示所述部分子信道中的每个子信道的配置信息;其中,所述子信道分配字段所指示的多个子信道中,在所述用户信息部分没有指示配置信息的剩余的部分子信道,用于随机接入;
接入点发送所述触发帧。
另一方面,提供了一种资源指示接收方法,包括
站点接收触发帧,所述触发帧括:子信道分配字段,用于指示将整个带宽划分成的多个子信道;和,用户信息部分,用于针对所述子信道分配字段所指示的部分子信道,指示所述部分子信道中的每个子信道的配置信息;其中,所述子信道分配字段所指示的多个子信道中,在所述用户信息部分没有指示配置信息的剩余的部分子信道,用于随机接入;
所述站点在需要进行随机接入传输时,使用所述触发帧指示的随机接入资源进行随机接入传输。
另一方面,提供了一种资源指示发送方法,包括:
接入点生成触发帧,所述触发帧包括:子信道分配字段,用于指示将整个带宽划分成的多个子信道;和,用户信息部分,用于针对子信道分配字段中分配的每一个子信道,指示所述每一个子信道将调度传输或者随机接入传输,以及,用于调度传输时的配置信息,或者,用于随机 接入传输时的每个随机接入信道占用的RU数;
接入点发送所述触发帧。
另一方面,提供了一种资源指示接收方法,包括
站点接收触发帧,所述触发帧括:子信道分配字段,用于指示将整个带宽划分成的多个子信道;和,用户信息部分,用于针对子信道分配字段中分配的每一个子信道,指示所述每一个子信道将调度传输或者随机接入传输,以及,用于调度传输时的配置信息,或者,用于随机接入传输时的每个随机接入信道占用的RU数;
所述站点在需要进行随机接入传输时,使用所述触发帧指示的随机接入资源进行随机接入传输。
相应的,本发明实施方式还提供了可以执行前述方法的相应的装置来例如芯片、接入点,或者站点。
通过上述各实施方式,可以高效率的向站点指示可以用于随机接入的通信资源,方便站点的使用,其中有些实施方式可以节省一些通信资源。
附图说明
为了更清楚地说明本发明实施例的技术方案,下面将对本发明实施例中所需要使用的附图作简单地介绍,显而易见地,下面所描述的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1a是本发明实施例可应用的***构架的示意图。
图1b是本发明实施例可应用的流程示意图。
图2是本发明一个实施例的一个物理层触发帧的示意图。
图3是本发明一个实施例的一个MAC层触发帧的示意图。
图4是本发明一个实施例的触发帧的结构示意图。
图5是本发明一实施例的子信道分配信息的示意图。
图6是本发明一个实施例的资源块分配的示意图。
图7是本发明一个实施例的子信道分配的示意图。
图8、9、10a、10b、11a、11b、12a、12b、12c、12d、12da、12e、13、14、15分别是本发明一实施例的触发帧的结构示意图。
图16是本发明一实施例的子信道的位置示意图。
图17是本发明一实施例的接入点的框图。
图18是本发明一实施例的站点的框图。
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例是本发明的一部分实施例,而不是全部实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例,都应属于本发明保护的范围。
接入点(AP,Access Point),也可称之为无线访问接入点或桥接器或热点等,其可以接入服务器或通信网络。
站点(STA,Station),还可以称为用户,可以是无线传感器、无线通信终端或移动终端,如支持WiFi通讯功能的移动电话(或称为“蜂窝”电话)和具有无线通信功能的计算机。例如,可以是支持WiFi通讯功能的便携式、袖珍式、手持式、计算机内置的,可穿戴的,或者车载的无线通信装置,它们与无线接入网交换语音、数据等通信数据。
图1a为一个本发明实施方式应用的WLAN***的简单示意图。图1a的***包括一个或者多个接入点AP101和一个或者多个站点STA102。接入点101和站点102之间采用OFDMA技术进行无线通信,其中接入点101发送的触发帧中包含针对站点102或者站点组的通信资源的指示信息。
具体的,参考图1b,本发明一个实施方式提供了一种资源指示的方法, 应用于采用OFDMA技术的无线局域网,接入点AP构造(或者生成)并发送触发帧,所述触发帧包括:用于指示随机接入资源的信息,其具体结构可以参考后续各实施方式。
前面提到,OFDMA传输是多用户传输,一般的,AP发送的触发帧包含子信道分配信息和用户信息部分。其中,在本发明提供的实施方式中,子信道分配信息用于将整个信道划分为子信道,用户信息部分用于将特定的子信道分配给特定的用户(用于调度传输),或者,将特定的子信道分配用于随机接入传输(即任意的用户都可以在该子信道上进行传输)。
触发帧结构
本文各实施方式提到的触发帧,可以是一个物理层触发帧,也可以是一个MAC层触发帧。该触发帧用于触发OFDMA传输。
对于物理层触发帧,例如,是一个NDP帧,只有物理层前导,而没有MPDU(即MAC层协议数据单元)部分。如图2所示,物理层触发帧包括legacy preamble和HE preamble两个部分,而高效前导又包含HE-SIG A、HE-SIG B、HE-STF和HE-LTF四个部分。触发帧的触发信令位于物理层前导的HE preamble的HE-SIG B中。
对于MAC层触发帧,它包含物理层前导和MPDU,其中MPDU又包含MAC header和payload两部分,如图3所示,触发帧的触发信令位于MPDU的payload中。
无论是物理层触发帧还是MAC层触发帧,其中的触发信令包括公共信息部分和位于该公共信息部分之后的用户信息部分,如图4所示。公共信息部分包含针对所有用户的公共信息,例如子信道分配信息、或者带宽等传输参数。如图5所示,子信道分配信息主要用于指示将整个带宽划分成的若干个子信道;用户信息部分是针对每个子信道的配置信息,每个子信道都有一段对应的用户信息,用于指示子信道分配字段中分配的子信道将 用于传输哪个站点或者站点组的信息以及相应的传输参数。如图5的示例中,子信道分配信息将整个带宽划分为4个子信道,那么用户信息部分将包括4段用户信息,分别对应每一个子信道。用户信息部分中包含用户的标识和传输参数等信息,如MCS、或者空间流等。一般的,站点接收到该触发帧后,先读取公共信息部分,必要时再读取用户信息部分。
虽然子信道分配信息不是各实施方式所必需的的内容,但为了说明的更清楚,下面详细介绍子信道分配信息。一般的,基于用于传输的最小通信资源单位——资源单元(resource unit,RU)进行子信道分配,换言之,连续的一个或者多个资源单元RU组成子信道,实际的传输过程中,针对每个子信道分配在该子信道上进行传输的站点或者站点组。或者说,针对一个站点或者站点组所分配的一个或者多个RU所在的频带,被称为子信道。需要说明的是,本发明专利中提到的RU指的是由若干个子载波组成的子载波组。例如,在下一代Wifi标准中,RU为26个子载波组成的子载波组。
举例说明,20MHz带宽的信道包含9个资源单元(resource unit,RU),其子信道分配信息包含9个bit,每个比特用于指示针对对这9个RU的分割信息,将20MHz带宽的信道划分为若干个子信道,其中每个子信道占用一个或多个RU。例如,参考图5,为一个子信道分配信息的举例:“001101111”。如图5的左侧,其每个比特表示的含义如下:前两个0表示前两个RU形成一个子信道,接下来的两个1表示第3个和第4个RU形成一个子信道,接下来的0表示第五的RU形成一个子信道,最后的4个1表示最后4个RU形成一个子信道,如图2的右侧所示。
对于每一个子信道,都需要有对应的用户信息部分,用于指示用户参数信息,包含用户的ID(站点或者站点组的ID),以及MCS,或者,流数等传输参数等,各实施方式中对具体的参数不进行限制。
更为具体的,目前802.11ax以26个子载波为一个资源块。如图6所示,以20M带宽为例,802.11ax在数据符号部分的DFT/IDFT点数为256, 也就是存在256个子载波,其中子载波-1、0、1为直流分量(Direct current,DC),左边带子载波-122到子载波-2以及右边带子载波2到子载波122用于承载数据信息,也就是说,有242个子载波用于承载数据信息。子载波-128到子载波-123以及子载波123到子载波128为保护带。这242个子载波分成9个资源块,每个资源块为26个子载波,并剩余8个未使用的子载波。从图6中可见,这9个资源块分别占据了子载波-122到子载波-97(资源块1)、子载波-95到子载波-70(资源块2)、子载波-68到子载波-43(资源块3)、子载波-41到子载波-16(资源块4)、子载波-14到子载波14(资源块5)、子载波16到子载波41(资源块(资源块6)、子载波43到子载波68(资源块7)、子载波70到子载波95(资源块8)、子载波97到子载波122(资源块9)。而剩余的8个未使用的子载波分别为子载波-96、-69、-42、-15、15、42、69、96,这里称为空余子载波集合。
更为具体的,802.11ax对资源块的划分(子信道的分配)有如下限定,以20M带宽的通信信道为例,仅存在1*26,2*26,4*26,242四种大小的资源块。参考图7,20MHz带宽分块图(即子信道分配图)分为4层,中间1*26跨DC,DC子载波为图中中间小缝。第一层为1*26分布图,第二层为2*26和1*26分布图,第三层为4*26和1*26分布图,第四层为242分布图。20MHz的子信道分配图,可以为这3层中任意子信道组合而成242个子载波大小的频谱或者信道,每个用户只能分配其中一个子信道。
一种可能的触发帧
触发帧中如何进行指示用于上行OFDMA随机接入的子信道资源,是本实施方式需要特别关注的。
在一个较差的实施方式中,在触发帧的公共信息部分包含一个指示信息位,用于指示子信道分配字段所划分出的所有子信道均用于随机接入。举个例子来说,参考图8,若整个OFDMA传输的带宽为20MHz,一共包含9个RU。若 子信道分配字段将该20MHz带宽上的9个RU划分为4个子信道,分别占用2个,2个,1个和4个RU。触发帧中包含的指示信息位为1时,表示该4个子信道全部用于随机接入,即4个随机接入子信道,分别占用2个、2个、1个和4个RU。该指示信息位为0时,表示该4个子信道并非全部用于随机接入,即部分用于随机接入或者全部不能用于随机接入。
除此之外,在该较差的实施方式中,在触发帧的用户信息部分针对每一个用户(站点或者站点组)分别包含一个指示信息位,用于指示该用户信息部分对应的子信道可用于随机接入。如图9,若整个OFDMA传输的带宽为20MHz,一共包含9个RU。若子信道分配字段将该20MHz带宽上的9个RU划分为4个子信道,分别占用2个,2个,1个和4个RU,那么触发帧的用户信息部分包含4个用户信息。对于每一个用户信息,其中的指示信息位为1表示该子信道用于随机接入,其中的指示信息位为0表示该子信道不用于随机接入(即用于调度传输)。如图9所示,第一个子信道(占2个RU)和第三个子信道(占1个RU)是用于随机接入的,其余的子信道是用于调度传输的。
但是,上述实施方式中,子信道分配字段需要占用较大信令开销,需要对每一个子信道分别进行指示其是否用于随机接入,效率较低。
较优的触发帧结构一
参考图10a所示的一种较优的触发帧结构,该触发帧中,包括第一指示信息I1,用于指示该触发帧是否允许随机接入传输。该第一指示信息I1,例如名称为触发随机接入传输指示位,简称TFR指示位。若该第一指示信息I1为1,则该触发帧将分配资源用于随机接入;若该第一指示信息I1为0,则该触发帧不会分配资源用于随机接入(即所有的传输带宽均用于调度传输)。站点接收到该触发帧后,在自己需要进行随机接入但是该TFR指示位为0,可以停止读取该触发帧的后续信息,减少站点处理资源的浪费。
该触发帧中,包括第一指示信息I1以外,还包括第二指示信息I2,用 于指示是否整个传输带宽均用于随机接入。该第二指示信息I2例如称为“contention indication”指示位,该指示位为1表示整个传输带宽均用于随机接入,0表示部分传输信道用于随机接入。这样,可以进一步区分两种允许随机接入的触发帧,即整个传输带宽均用于随机接入和部分传输带宽用于随机接入这两种子类。
在本实施方式中,参考图10b,如果第一指示信息I1为1,第二指示信息I2也为1,这时,整个传输带宽均用于随机接入。该触发帧中,不包含子信道分配信息(位于公共信息部分)和用户信息部分,这样,可以进一步节省通信资源。
另外,需要说明的是,本实施例中的可以只包含第一指示信息I1(TFR指示位),而不包含第二指示信息I2(contention indication指示位)。或者说,TFR指示位与contention indication指示位并不是紧耦合出现的。在这种情况下,TFR=1表示该触发帧将分配资源用于随机接入;而TFR=0表示该触发帧不会分配资源用于随机接入,即所有的传输带宽均用于调度传输。此处的第一指示信息I1不同于图9所示实施方式中的指示信息位的功能。
较优的触发帧结构二
参考图11a,为第一指示信息I1(TFR指示位)为1,第二指示信息I2(contention indication指示位)为0时的一种触发帧,即部分传输信道用于随机接入时的一种触发帧。当然,具体的触发帧中,也可以不包含第一指示信息I1(TFR指示位),或者不包含第二指示信息I2(contention indication指示位),或者,不包含第一指示信息I1(TFR指示位)和第二指示信息I2(contention indication指示位)。
具体的,AP发送的触发帧中包括子信道分配字段,一般的,该子信道分配字段用于指示将整个带宽划分成的若干个子信道。与其他实施方式不同的是,该触发帧包括第三指示信息I3,用于指示用于随机接入的子信道的数量, 可以称为随机接入子信道信息域“sub-channel number for random access”。
另外,该触发帧还可以包括第五指示信息I5,用于指示每个随机接入子信道所占用的RU的数量N,可以称为随机接入RU信息域“RU number of random access sub-channel”。较优的,N的值为1或2或4或9。
在本发明实施例中,用于随机接入的子信道位置是相对固定的,即占用整个频带的开头或尾部的一段连续的RU。若随机接入子信道信息域“sub-channel number for random access”的值为M,随机接入RU信息域“RU number of random access sub-channel”的值为N,那么用于随机接入的RU为整个频带或者信道的开头或尾部的M*N个RU。举例来说,在图11a的示例中,触发帧中分配了3个用于随机接入的子信道,每个随机接入子信道占1个RU,这时,用于随机接入的RU为整个信道的开头的3个RU,或者尾部的3个RU。
可以替换的,参考图11b,在本实施例中,触发帧的不包含上述第三指示信息I3“sub-channel number for random access”信息域,而是包含第四指示信息,用于指示用于随机接入的RU的总数量,可以称为随机接入总RU信息域“RU number for random access”。即,该触发帧中包含第四指示信息以及上述第五指示信息I5。
接收到该触发帧的站点根据前述该触发帧确定用于随机接入的子信道位置,并在相关子信道上随机接入并进行传输。具体的:
若“RU number for random access”的值为T,“RU number of random access sub-channel”的值为N,那么用于随机接入的子信道占用整个频带的开头或尾部的连续T个RU,若用于随机接入的RU包含特殊位置的RU(如图3所示20MHz带宽的中间的RU),则将该特殊位置的RU作为一个单独的随机接入子信道;对于其他的RU,对其进行顺序地划分,每个随机接入子信道占用连续的N个RU,若在划分的过程中发现剩余的RU不足以形成连续的N个RU,那么将其作为独立的随机接入子信道。
可以替换的,上述图11a、图11b中触发帧中可以不包含上述第五指示信息I5(随机接入RU信息域),此时,每个用于随机接入的子信道所占用的RU数量为默认值,例如为1个RU或者2个RU。
需要说明的是,较优的,在部分RU被分配成进行随机接入的子信道之后,触发帧中公共信息部分中的子信道分配字段可以只针对其他的RU进行分配指示,例如图11a已经有3个RU被指示为随机接入的子信道,对于占用9个RU的20MHz信道,子信道分配字段可以只占用6个比特,即可以实现对剩余的6个RU的分配,这样,可以在一定程度上减少子信道分配字段的信令开销。
较优的触发帧结构三
参考图12a、12b,为第一指示信息I1(TFR指示位)为1,第二指示信息I2(contention indication指示位)为0时的一种触发帧,即部分传输信道用于随机接入时的另一种触发帧。当然,具体的触发帧中,也可以不包含第一指示信息I1(TFR指示位),或者第二指示信息I2(contention indication指示位),或者,触发帧中不包含第一指示信息I1(TFR指示位)和第二指示信息I2(contention indication指示位)。
参考图12a,AP发送的触发帧中包括子信道分配字段,该子信道分配字段用于指示将整个带宽划分成的若干个子信道。与其他实施方式不同的是,在触发帧中包括第六指示信息I6,用于指示子信道分配字段所划分出的子信道中的哪一个(或哪一些)子信道是用于随机接入的。具体的,可以是如图12a中称为随机接入子信道位置信息域“sub-channel location for random access”,具体指示第几个子信道是用于随机接入的(I6-1)。或者,可以是如图12b中称为随机接入子信道位图信息域“sub-channel bitmap for random access”,通过位图的方式对分别具体指示每个子信道是否用于随机接入(I6-2)。
以图12a为例,AP通过子信道分配字段将整个带宽(以20MHz为例)划分为3个子信道,每个子信道分别占4个、1个和4个RU。“sub-channel location for random access”信息域的值为3(或二进制表示为011),表示第3个子信道用于随机接入。可以替换的,以图12b为例,AP通过子信道分配字段将整个带宽(以20MHz为例)划分为3个子信道,每个子信道分别占4个、1个和4个RU。此时“sub-channel bitmap for random access”信息域的值为“001”,表示第3个子信道是用于随机接入。
另外,可以在触发帧也可以如图12b、12c所示包含前文提到过的第五指示信息I5,用于指示每个用于随机接入的子信道所占用的RU的数量。图12b、图12c中所示第五指示信息I5每个用于随机接入的子信道所占用的RU的数量为2。
当然,可以替换的,也可以不包含上述第五指示信息I5(随机接入RU信息域),此时,每个用于随机接入的子信道所占用的RU数量为默认值,例如为1个RU。
较优的触发帧结构三a
在另外一种较优的触发帧结构中,触发帧的公共部分不包含子信道分配信息,子信道分配信息位于用户信息部分,该子信道分配信息将为对应的用户划分出一个子信道用于传输。
当触发帧用于触发上行随机接入时,可以在触发帧的用户信息部分使用一个特殊的AID(如AID=0)来表示所述用户信息部分将分配一个或多个子信道用于随机接入,也可以用一个单独的指示信息来表示所述用户信息部分将分配一个或多个子信道用于随机接入。为了灵活地指示每一个最小RU是否用于随机接入,可以在触发帧的用户信息部分中包括一个位图(bitmap)信息,所述位图信息可以是第7指示信息I7,所述位图信息用来指示每一个最小RU是否用于随机接入,可以用1表示对应的最小RU是用来随机接入的, 用0表示对应的最小RU不是用来随机接入的。也可以反过来表示,本实施例对此不做限制。另外,所述最小RU是指包含26个子载波的RU。
所述位图信息的长度与触发帧所触发的上行多用户传输的带宽相关,如果所述上行多用户传输的带宽为20MHz,上行多用户传输包含9个最小RU,那么所述位图信息的长度为9个bit,每个bit分别表示对应的RU是否用于随机接入。如果所述上行多用户传输的带宽更大,则所述位图信息的长度更长,等于所述上行多用户传输的带宽所包含的最小RU的个数。具体的说,对应于40MHz的位图信息长度为18个bit,对应于80MHz的位图信息长度37个bit,对应于160MHz的位图信息长度为74个bit.可选的,可以在用户信息部分包含第8指示信息I8,用来指示每个随机接入子信道所占用的最小RU的个数。参考图12d,AP发送的触发帧包括公共信息部分和用户信息部分,其中用户信息部分包含用户标识AID,所述用户标识AID为一个特殊的值(如AID=0)表示所述用户信息部分分配的子信道是用来做随机接入的。当AID为一个特殊的值时,所述用户信息部分包含第7指示信息I7,即位图信息,通过位图的方式对分别具体指示每个RU是否用于随机接入。
以图12d为例,以20MHz带宽为例,触发帧的一个用户信息部分包含特殊的AID,表示该用户信息部分包含位图信息,位图中的每个比特位分别用来指示相应的每个RU是否用于随机接入。由于带宽为20MHz,所述位图的长度为9bit。所述位图的值为110101000,表示第1,2,4,6个RU被分配用于随机接入。
由于当带宽较大时,位图的开销较大,如160MHz带宽时,位图的长度为74bit,因此可以对位图进行适当的压缩以降低开销。可以采用如下的层次化的位图结构。第一层的位图可以以20MHz为单位,当带宽为160MHz时,可以用8bit表示对应的8个20MHz中是否有RU被分配用于随机接入。可以用1表示有,0表示没有。第二层的位图可以针对第一层位图中1对应的那 些20MHz进行进一步指示,每个20MHz对应9bit,每个bit分别具体指示每个RU是否用于随机接入。
以图12da为例,若带宽为160MHz,第一层的位图为“10100000”表示第一个和第三个20MHz中有RU被分配用于随机接入。第二层的位图针对第一个和第三个20MHz进行具体的指示。第二层的位图为“111101011110010000”,表示第一个20MHz中的第1,2,3,4,6,8,9个RU以及第二个20MHz中的第1,2,5个RU被分配用于随机接入。
另外,所述第一层位图和、或第二层位图也可以分别由一个指示信息域代替,分别表示包含随机接入RU的20MHz的个数以及每个20MHz中用于随机接入的RU的个数。具体的位置可以是固定在前面的连续的若干个20MHz和若干个RU。
可选的,可以在触发帧中包括指示信息,用来指示是否采用了上述层次化的位图。所述指示信息可以位于触发帧的公共信息部分,也可以位于用户信息部分。
对于本较优的触发帧结构三a,其用户信息部分也可以不包含位图信息,而是包含第9指示信息I9,所述I9用于指示用于随机接入的RU的个数。其中,所述用于随机接入的RU可以是从第一个RU开始的连续的若干个RU,也可以是从最后一个RU开始往回算的连续的若干个RU。可选的,还可以在用户信息部分包含第10指示信息I10,所述I10用于指示用于随机接入的RU的开始位置。可选的,也可以在用户信息部分包含第8指示信息I8,用来指示每个随机接入子信道所占用的最小RU的个数。
参考图12e,AP发送的触发帧包括公共信息部分和用户信息部分,其中用户信息部分包含用户标识AID,所述用户标识AID为一个特殊的值(如AID=0)表示所述用户信息部分分配的子信道是用来做随机接入的。当AID为一个特殊的值时,所述用户信息部分还包含第9指示信息I9,所述I9用 于指示用于随机接入的RU的个数。例如,所述I9的值为K表示前K个(或后K个)RU是用于随机接入的。
对于本较优的触发帧结构三a,以上的描述提供了两种可能的实施方式,第一种采用的是位图信息,第二种采用的是个数信息,分别如图12d和图12e所示。这两种方式各有优势,第一种较为灵活,第二种开销较小。为了同时具备这两种方式的优势,可以在触发帧中包含第11指示信息I11,用来指示本触发帧采用的是第一种实施方式还是第二种方式。所述指示信息I11可以位于触发帧的公共信息部分,也可以位于用户信息部分。
较优的触发帧结构四
AP生成并发送的触发帧包括子信道分配字段,该子信道分配字段用于指示将整个带宽划分得到的若干个子信道。触发帧还包括用户信息部分,用于针对前述分配的子信道中的一部分,指示该子信道将用于哪一个或者哪些用户(站点或者站点组)的信息传输,对于未进行分配指示或者调度指示的部分子信道,默认为用于随机接入传输。本发明实施例中,在用户信息部分的用户信息的个数小于子信道分配字段中的子信道的个数,那些没有被分配或者指示用户信息的子信道被默认为用于随机接入。站点接收到该触发帧后,通过解析子信道分配字段和用户信息部分,如果该站点被分配有子信道,则在被分配的子信道上进行传输,如果没有被分配子信道,在需要随机接入进行传输时,可以随机接入没有被分配用户信息的子信道进行传输。
另外,可选的,触发帧(如公共信息部分)还包括第五指示信息I5,即随机接入子信道的RU信息域“RU number of random access sub-channel”,用于指示每个随机接入信道占用的RU数。
举例来说,参考图13,针对20MHz带宽(9个RU),触发帧的子信道分配 字段中,将整个带宽分为4个子信道,分别占用2个、2个、1个和4个RU,然而触发帧的用户信息部分只有3段用户信息。那么接收站点根据上述触发帧确认用户信息部分中的3段用户信息分别是针对前3个子信道的用户信息,而第4个子信道(包含4个RU)默认用于随机接入。若信息域“RU number of random access sub-channel”的值为2,那么第4个子信道将进一步被分为2个随机接入子信道,每个随机接入子信道占2个RU。
需要说明的是,图13中的TFR和contention indication为可选字段。
较优的触发帧结构五
与图8所示的较差触发帧相比,参考图14,AP发送的触发帧中(例如公共信息部分)包括子信道分配字段,该子信道分配字段用于将整个信道划分为若干个子信道,或者,用于指示整个信道被划分出的若干个子信道。另外,还包括用户信息部分,用于针对子信道分配字段中分配的每一个子信道指示其将调度传输或者随机接入传输,以及,调度传输时用于传输哪个站点或者站点组的信息以及相应的传输参数(即配置信息),随机接入传输时的每个随机接入信道占用的RU数。
在此基础上,本发明实施例提出,在触发帧的各个用户信息部分可以分别包括“sub-channel contention indication”指示位,用来指示本子信道是否用于随机接入。另外,对于用于随机接入的子信道,可以在用户信息部分包括:随机接入子信道的RU信息域“RU number of random access sub-channel”,用于指示每个随机接入信道占用的RU数。这样,可以通过该随机接入子信道的RU信息域,当该信息域指示的数量大于1时,相当于对该子信道进行进一步的划分,划分为多个随机接入子信道,站点在进行随机接入时使用多个随机接入子信道之一进行传输。另外,还可以在用户信息部 分包括:用户组信息域“group ID”,用于指示可以在相应的子信道进行随机接入的用户组。这样,进行随机接入的用户得到进一步清晰的限定,避免过多用户参与随机接入出现比较大概率的冲突。
需要说明的是,参考图14,其中的TFR和Contention Indication字段为可选字段。
这里需要说明的是,通过在触发帧的公共信息部分或用户信息部分携带“RU number for random access sub-channel”信息域,能够有效地使得调度传输与随机接入传输对齐。如下图所示,在(1)中调度传输占用的较长的时间,我们可以给随机接入信道分配较少的RU,使得随机接入传输也占用与调度传输类似的较长时间;在(2)中调度传输占用的较短的时间,我们可以给随机接入信道分配较多的RU,使得随机接入传输也占用与调度传输类似的较短时间,而如果此时我们给随机接入信道分配较少的RU,那么随机接入传输将占用较长的时间,为了实现传输的对齐,在调度传输后面需要添加填充位,浪费了部分信道资源。
Figure PCTCN2016076000-appb-000001
较优的触发帧结构六
本发明实施方式中的OFDMA传输,可以包括多个时间段,每个时间段上的频率资源都可以分配给多个用户(站点或者站点组)进行传输。前面提到的各个实施例都未涉及时间段的问题,实际上,前述各实施方式也可以应用于针对多个时间段的情况,即该触发帧中包括传输时间段的指示以及针对相应的时间段的随机接入子信道或者被调度的子信道的指示。
具体的,可以有多种方式实现前述的多个传输时间段及相应的通信资源的指示。例如,该触发帧中包括:本次传输中的时间段的数量,依次排列的针对各个时间段的随机接入子信道或者被调度的子信道的指示。或者,该触发帧中包括:依次排列的本次传输中的时间段的标识以及针对该时间段的标识的随机接入子信道或者被调度的子信道的指示。
参考图15,AP发送触发帧,触发5个STA在2个时间段上分别进行传输,第一个时间段的频谱资源分配给STA1和STA2,第二个时间段的频谱资源分配给STA3、STA4和STA5。
正如前面已经提到的,针对每一个时间段的资源指示方式,可以采用前面提到的较优触发帧结构一到较优的触发帧结构五,此处不再赘述。
上面介绍了几种较优的触发帧结构,在无线局域网中,100、AP根据实际情况生成并发送上述的触发帧;200、站点接收该触发帧并采用触发帧中指示的通信资源进行传输,其中,对于触发帧中指示的用于随机接入的子信道,站点(如果自己没有被调度)可以随机接入该子信道,如果没有其他站点也接入,则可以使用该子信道来完成通信传输。
具体的,AP根据实际情况生成并发送上述的触发帧的过程,可以包括:
101、AP确定用于随机接入的子信道数M,或者,AP确定用于随机接入的子信道的位置,或者,AP进一步确定每个随机接入子信道所需占用的RU个数N(或者默认为N个RU),根据上述确定的M或者位置(或者进一步根据N)生成触发帧。
可选的,参考较优的触发帧结构一,若确定的用于随机接入的子信道数M>0,生成的触发帧的“TFR”指示位为1,否则“TFR”指示位为0。当然,可以不包含“TFR”指示位。
可选的,参考较优的触发帧结构一,若确定的用于随机接入的子信道数M>0,且用于随机接入的子信道占用了整个传输带宽,则生成的触发帧的“contention indication”指示位为1,否则“contention indication”为0。当然,可以不包含“contention indication”指示位。
可选的,参考较优的触发帧结构二,根据用于随机接入的子信道数M,若M>0,生成的触发帧包含随机接入子信道信息域“sub-channel number for random access”,且其值为M。
可选的,参考较优的触发帧结构二,根据用于随机接入的子信道数M,生成的触发帧包含随机接入总RU信息域“RU number for random access”T。
可选的,参考较优的触发帧结构二,根据每个随机接入子信道所需占用的RU个数N,生成的触发帧中包含“RU number of random access sub-channel”信息域,且其值为N。其中,如果默认每个随机接入子信道所需占用的1个RU,生成的触发帧中可以不包含“RU number of random access sub-channel”。
可选的,参考较优的触发帧结构三,AP在触发帧(如公共信息部分)包含子信道分配字段,用于指示整个带宽划分的若干个子信道;若M>0,该触发帧中包括随机接入子信道位置信息域“sub-channel location for random access”或者随机接入子信道位图信息域“sub-channel bitmap for random  access”,指示用于随机接入的子信道的位置。
可选的,参考较优的触发帧结构四,AP在触发帧(如公共信息部分)包含子信道分配字段,用于指示整个带宽划分的若干个子信道。触发帧还包括用户信息部分,用于针对前述分配的子信道,指示该子信道将用于哪一个用户的信息传输。根据AP确定的用于随机接入的子信道数M,一般的,可以按照子信道分配字段所分配的多个子信道中从后到前的M个子信道用于随机接入,对于相应的用于随机接入的子信道,在用户信息部分部分不做任何指示。
可选的,参考较优的触发帧结构五,AP在触发帧(如公共信息部分)包含子信道分配字段,用于指示整个带宽划分的若干个子信道。触发帧还包括用户信息部分,用于针对前述分配的子信道,指示该子信道将用于哪一个用户的信息传输。根据AP确定的用于随机接入的子信道的位置,在触发帧的各个用户信息部分分别包括“sub-channel contention indication”指示位,用来指示本子信道是否用于随机接入;还可以进一步根据确定的每个随机接入子信道所需占用的RU个数N(或者默认为N个RU),在用户信息部分包括:随机接入子信道的RU信息域“RU number of random access sub-channel”,用于指示每个随机接入信道占用的RU数。
具体的,站点接收该触发帧并采用触发帧中指示的通信资源进行传输可以包括:
对于需要通过OFDMA随机接入进行传输的STA,通过读取AP发送的触发帧,获得触发帧中指示的可用于随机接入的子信道的位置信息,以便于在相应的子信道上随机接入并进行传输。其随机接入的过程,不是本实施方式关注的重点,在此不赘述。其获得触发帧中指示的可用于随机接入的子信道的位置信息的过程,根据触发帧的结构的不同,可能有不同的过程:
可选的,参考较优的触发帧结构一,201、对于需要通过OFDMA随机接入 进行传输的STA,接收触发帧后,读取“TFR”指示位,若该指示位为1,则进一步读取“contention indication”指示位。
202、若“TFR”指示位为0,则说明该触发帧不会分配资源用于随机接入,不再继续获取随机接入信息。若“contention indication”指示位为1,若该指示位为0,则说明该触发帧不会分配资源用于随机接入。
203、若201中读取的“contention indication”指示位为1,即指示整个传输带宽均用于随机接入,则可以随机选取N一个子信道进行随机接入。子信道的具***置,可以参考该子信道占用的RU数(即“RU number of random access sub-channel”信息域)或者根据默认的子信道占用的RU数来确定。
例如,以下一代wifi标准为例,在20MHz带宽内,每个用户占用的子信道带宽为1个、2个、4个或9个RU,所以步骤203中N的值为1或2或4或9。另外,根据前面介绍的子信道分配信息,部分特殊位置的RU只能单独作为一个子信道用于传输,例如20MHz带宽内的中间的RU。因此,在确定随机接入子信道的位置时,一般的,上述特殊位置的RU作为单独的随机接入子信道,其他的RU按照N的值进行确定。例如,若步骤201-202中,站点获取的信息包括:L20MHz带宽全部用于随机接入,且每个随机接入子信道占用2个RU(即N=2),那么由于已经知道20MHz包括9个RU,且中间的RU(第5个RU)只能单独作为一个子信道用于传输,其他的8个RU可以根据N=2划分为4个用于随机接入的子信道,也就是说,可以用于随机接入的子信道的位置如图15所示,需要随机接入的STA在图16所示的5个子信道中随机选择一个子信道进行接入。
可选的,参考较优的触发帧结构二,STA读取触发帧中的“sub-channel number for random access”信息域的值M或者,或者进一步读取“RU number of random access sub-channel”信息域的值N(可以默认为L),并根据所述M和N确定用于随机接入的子信道的位置:用于随机接入的子信道占用整个频带(例如20MHz)的开头或尾部的连续M*N个RU,且其中顺数或者倒数的第 i个子信道占用第(i-1)*N+1个RU至第i*N个RU。
可选的,参考较优的触发帧结构二,STA读取触发帧中的“RU number for random access”T,或者进一步读取“RU number of random access sub-channel”信息域的值N(可以默认为L),并根据所述M和N确定用于随机接入的子信道的位置:用于随机接入的子信道占用整个频带(例如20MHz)的开头或尾部的连续T个RU,若用于随机接入的RU包含特殊位置的RU(如20MHz带宽的中间的RU),则将该特殊位置的RU作为一个单独的随机接入子信道;对于其他的RU,每个随机接入子信道占用连续的N个RU,若发现剩余的RU不足以形成连续的N个RU,那么将剩余的RU作为独立的随机接入子信道。
可选的,参考较优的触发帧结构三,STA读取触发帧公共信息部分中的“sub-channel location for random access”信息域,或者进一步根据“RU number of random access sub-channel”信息域N(可以默认为L),确定用于随机接入的子信道的位置。具体地,STA根据“sub-channel location for random access”信息域确定每一个用于随机接入的子信道,并获得其起始RU(该子信道的第一个RU)的位置。若某个被分配用于随机接入的子信道的起始RU的位置是S,且“RU number of random access sub-channel”信息域的值为N,那么第一个随机接入子信道占用第S+1至第S+N个RU,第二个子信道占用第S+N+1至第S+2N个RU,以此类推。若当第i个子信道占用第S+(i-1)*N+1个RU至第S+i*N个RU之后,剩余的RU数大于0小于N,那么剩余的全部RU作为一个随机接入子信道。
可选的,参考较优的触发帧结构四,STA读取触发帧读取触发帧(例如公共信息部分)中的子信道分配字段,确定该字段所指示的子信道位置及子信道个数。STA读取触发帧的用户信息部分,确定所述用户信息部分包含多少个用户信息。若所述用户信息部分包含的用户信息个数U小于子信道分配字段划分出的子信道个数J,则最后的J-U个子信道用于随机接入。可以进一 步读取“RU number of random access sub-channel”信息域(可以默认为L),从而确定用于随机接入的子信道的位置。具体地,STA可以根据子信道分配字段和用户信息部分确定用于调度传输的子信道所占用的RU数的总和。若用于调度传输的子信道所占用的RU数的总和为S,且“RU number of random access sub-channel”信息域的值为N,那么第一个随机接入子信道占用第S+1至第S+N个RU,第二个子信道占用第S+N+1至第S+2N个RU,以此类推。若当第i个子信道占用第S+(i-1)*N+1个RU至第S+i*N个RU之后,剩余的RU数大于0小于N,那么剩余的全部RU作为一个随机接入子信道。
可选的,参考较优的触发帧结构五,需要随机接入的STA用户信息部分,对于一个子信道对应的用户信息部分,读取其中的“sub-channel contention indication”指示位,以及,可以进一步“RU number of random access sub-channel”信息域(位于公共信息部分或者用户信息部分,或者默认为L),从而确定用于随机接入的子信道的位置。具体的,STA读取所有的用户信息部分,找到每一个用于随机接入的子信道,并获得其起始RU的位置。若某个被分配用于随机接入的子信道的起始RU的位置是S,且对应的用户信息中的“RU number of random access sub-channel”信息域的值为N,那么第一个随机接入子信道占用第S+1至第S+N个RU,第二个子信道占用第S+N+1至第S+2N个RU,以此类推。若当第i个子信道占用第S+(i-1)*N+1个RU至第S+i*N个RU之后,剩余的RU数大于0小于N,那么剩余的全部RU作为一个随机接入子信道。举例来说,若子信道分配字段将整个带宽划分为4个子信道,每个子信道分别占用2个、2个、1个和4个RU,且根据指示信息的指示,第1个和第4个子信道用于随机接入,且第一个子信道对应的用户信息中“RU number of random access sub-channel”信息域的值为1,第四个子信道对应的用户信息中“RU number of random access sub-channel”信息域的值为2,那么本次分配将产生4个随机接入子信道,第1个随机接入子信道占第1个RU,第2个随机接入子信道占第2个RU,第3个随机接入子信道占第6和第7个RU,第4 个随机接入子信道占第8和第9个RU。
可选的,参考较优的触发帧结构六,需要随机接入的STA可以读取触发帧中时间段的信息,以及针对各时间段的随机接入的子信道的信息,确认相应的各时间段的随机接入的子信道的位置,在相应的时间段内,在可以随机接入的子信道中选择一个用于随机接入的子信道进行接入。
相应的,另一实施方式提供了一种资源指示的处理装置(图中未示出),应用于采用OFDMA技术的无线局域网,包含处理单元,被配置用于发送或者接收前述各实施方式中的触发帧。具体的触发帧的结构与内容,可以参考前述各实施方式,此处不再赘述。处理单元可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件,可以实现或者执行本发明实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本发明实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成,或者用处理器中的硬件及软件模块组合执行完成。容易理解的,上述资源指示的处理装置,当具体为发送该触发帧时,可以位于接入点;当具体为接收该触发帧时,可以位于站点。
图17是本发明另一实施例的接入点的框图。图17的接入点包括接口101、处理单元102和存储器103。处理单元102控制接入点100的操作。存储器103可以包括只读存储器和随机存取存储器,并向处理单元102提供指令或者数据。存储器103的一部分还可以包括非易失行随机存取存储器(NVRAM)。接入点100的各个组件通过总线***109耦合在一起,其中总线***109除包括数据总线之外,还包括电源总线、控制总线和状态信号总线。但是为了清楚说明起见,在图中将各种总线都标为总线***109。
上述本发明实施例揭示的发送前述各种触发帧的方法可以应用于处理单元102中,或者由处理单元102实现。在实现过程中,上述方法的各步骤 可以通过处理单元102中的硬件的集成逻辑电路或者软件形式的指令完成。处理单元102可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件,可以实现或者执行本发明实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本发明实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成,或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器,闪存、只读存储器,可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器103,处理单元102读取存储器103中的信息,结合其硬件完成上述方法的步骤。
图18是本发明另一实施例的站点的框图。图18的站点包括接口111、处理单元112和存储器113。处理单元112控制站点110的操作。存储器113可以包括只读存储器和随机存取存储器,并向处理单元112提供指令和数据。存储器113的一部分还可以包括非易失行随机存取存储器(NVRAM)。站点110的各个组件通过总线***119耦合在一起,其中总线***119除包括数据总线之外,还包括电源总线、控制总线和状态信号总线。但是为了清楚说明起见,在图中将各种总线都标为总线***119。
上述本发明实施例揭示的接收前述各种触发帧以及根据各触发帧的处理方法可以应用于处理单元112中,或者由处理单元112实现。在实现过程中,上述方法的各步骤可以通过处理单元112中的硬件的集成逻辑电路或者软件形式的指令完成。处理单元112可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件,可以实现或者执行本发明实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本发明实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成,或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位 于随机存储器,闪存、只读存储器,可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器113,处理单元112读取存储器113中的信息,结合其硬件完成上述方法的步骤。
具体地,存储器113存储使得处理单元112执行如下操作的指令:确定资源状态信息,该资源状态信息指示接入点与站点进行数据传输的信道资源的子资源的忙闲状态;向接入点发送资源状态信息,以便于该接入点根据资源状态信息进行资源分配。
应理解,说明书通篇中提到的“一个实施例”或“一实施例”意味着与实施例有关的特定特征、结构或特性包括在本发明的至少一个实施例中。因此,在整个说明书各处出现的“在一个实施例中”或“在一实施例中”未必一定指相同的实施例。此外,这些特定的特征、结构或特性可以任意适合的方式结合在一个或多个实施例中。在本发明的各种实施例中,上述各过程的序号的大小并不意味着执行顺序的先后,各过程的执行顺序应以其功能和内在逻辑确定,而不应对本发明实施例的实施过程构成任何限定。
另外,本文中术语“***”和“网络”在本文中常被可互换使用。本文中术语“和/或”,仅仅是一种描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B这三种情况。另外,本文中字符“/”,一般表示前后关联对象是一种“或”的关系。
应理解,在本发明实施例中,“与A相应的B”表示B与A相关联,根据A可以确定B。但还应理解,根据A确定B并不意味着仅仅根据A确定B,还可以根据A和/或其它信息确定B。
本领域普通技术人员可以意识到,结合本文中所公开的实施例描述的各示例的单元及算法步骤,能够以电子硬件、计算机软件或者二者的结合来实现,为了清楚地说明硬件和软件的可互换性,在上述说明中已经按照功能一般性地描述了各示例的组成及步骤。这些功能究竟以硬件还是软件方式来执 行,取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本发明的范围。
所属领域的技术人员可以清楚地了解到,为了描述的方便和简洁,上述描述的***、装置和单元的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。
在本申请所提供的几个实施例中,应该理解到,所揭露的***、装置和方法,可以通过其它的方式实现。例如,以上所描述的装置实施例仅仅是示意性的,例如,所述单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如多个单元或组件可以结合或者可以集成到另一个***,或一些特征可以忽略,或不执行。另外,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口、装置或单元的间接耦合或通信连接,也可以是电的,机械的或其它的形式连接。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本发明实施例方案的目的。
另外,在本发明各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以是两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现,也可以采用软件功能单元的形式实现。
通过以上的实施方式的描述,所属领域的技术人员可以清楚地了解到本发明可以用硬件实现,或固件实现,或它们的组合方式来实现。当使用软件实现时,可以将上述功能存储在计算机可读介质中或作为计算机可读介质上的一个或多个指令或代码进行传输。计算机可读介质包括计算机存储介质和通信介质,其中通信介质包括便于从一个地方向另一个地方传送计算机程序 的任何介质。存储介质可以是计算机能够存取的任何可用介质。以此为例但不限于:计算机可读介质可以包括RAM、ROM、EEPROM、CD-ROM或其他光盘存储、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质。此外。任何连接可以适当的成为计算机可读介质。例如,如果软件是使用同轴电缆、光纤光缆、双绞线、数字STA线(DSL)或者诸如红外线、无线电和微波之类的无线技术从网站、服务器或者其他远程源传输的,那么同轴电缆、光纤光缆、双绞线、DSL或者诸如红外线、无线和微波之类的无线技术包括在所属介质的定影中。如本发明所使用的,盘(Disk)和碟(disc)包括压缩光碟(CD)、激光碟、光碟、数字通用光碟(DVD)、软盘和蓝光光碟,其中盘通常磁性的复制数据,而碟则用激光来光学的复制数据。上面的组合也应当包括在计算机可读介质的保护范围之内。
总之,以上所述仅为本发明技术方案的较佳实施例而已,并非用于限定本发明的保护范围。凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。

Claims (61)

  1. 一种资源指示发送方法,包括:
    接入点生成触发帧,所述触发帧包括:公共信息部分,所述公共信息部分包含针对所有用户的公共信息,所述公共信息部分包含用于指示所述触发帧是否允许随机接入传输的信息(I1);
    接入点发送所述触发帧。
  2. 一种资源指示接收方法,包括
    站点接收触发帧,所述触发帧包括公共信息部分,所述公共信息部分包含针对所有用户的公共信息,所述公共信息部分包含用于指示该触发帧是否允许随机接入传输的信息(I1);
    所述站点在需要进行随机接入传输时,使用所述触发帧指示的随机接入资源进行随机接入传输。
  3. 根据权利要求1或者2的方法,所述公共信息部分包括:用于指示是否整个传输带宽均用于随机接入的信息(I2)。
  4. 根据权利要求1-3任一所述的方法,其中,
    所述用于指示该触发帧是否允许随机接入传输的信息(I 1)为1,所述用于指示是否整个传输带宽均用于随机接入的信息(I2)也为1,所述公共信息部分中,不包含子信道分配信息,所述触发帧中不包含用户信息部分。
  5. 根据权利要求1-3任一所述的方法,其中,
    所述触发帧包括:所述公共信息部分包含子信道分配信息,所述子信道分配信息用于用于指示将整个带宽划分成的多个子信道;以及,位于公共信息部分之后的用户信息部分,所述用户信息部分,用于针对所述子信道分配字段所指示的子信道,指示所述子信道的配置信息。
  6. 根据权利要求1-5任一所述的方法,
    所述触发帧还包括:传输时间段的指示。
  7. 根据权利要求1-6任一所述的方法,
    所述触发帧为物理层触发帧,所述触发帧的触发信令位于物理层前导的的HE-SIG B中;
    所述触发帧为MAC层触发帧,所述触发帧的触发信令位于MPDU的payload中。
  8. 一种资源指示发送方法,包括:
    接入点生成触发帧,所述触发帧包括:用于指示用于随机接入的子信道的数量的信息(I3);
    接入点发送所述触发帧。
  9. 一种资源指示发送方法,包括:
    接入点生成触发帧,所述触发帧包括:用于指示用于随机接入的资源单元RU的总数量的信息(I4);
    接入点发送所述触发帧。
  10. 一种资源指示接收方法,包括
    站点接收触发帧,所述触发帧括:用于指示用于随机接入的子信道的数量的信息(I3);
    所述站点在需要进行随机接入传输时,使用所述触发帧指示的随机接入资源进行随机接入传输。
  11. 一种资源指示接收方法,包括
    站点接收触发帧,所述触发帧括:用于指示用于随机接入的子信道的数量的信息(I3);
    所述站点在需要进行随机接入传输时,使用所述触发帧指示的随机接入资源进行随机接入传输。
  12. 根据权利要求7-11任一的方法,包括:
    所述触发帧包括:用于指示每个随机接入子信道所占用的RU的数量的信息(I5)
    或者,
    每个随机接入子信道所占用的RU的数量为默认值,所述触发帧中不包括用于指示每个随机接入子信道所占用的RU的数量的信息(I5)。
  13. 根据权利要求7-12任一的方法,包括下述信息之一或者组合:
    所述触发帧包括:用于指示所述触发帧是否允许随机接入传输(I1);或者,
    所述触发帧包括:用于指示是否整个传输带宽均用于随机接入的信息(I2)。
  14. 根据权利要求7-13任一的方法,包括:
    所述触发帧包括:第一子信道分配字段,用于仅针对所述触发帧已经指示的用于随机接入的资源块RU以外的RU划分成的子信道的信息。
  15. 根据权利要求7-13任一的方法,包括:
    所述触发帧包括:第二子信道分配字段,所述子信道分配字段,用于指示将整个带宽划分成的子信道的信息
  16. 根据权利要求7-15任一所述的方法,
    所述触发帧还包括:传输时间段的指示。
  17. 根据权利要求7-16任一所述的方法,
    所述触发帧为物理层触发帧,所述触发帧的触发信令位于物理层前导的的HE-SIG B中;
    所述触发帧为MAC层触发帧,所述触发帧的触发信令位于MPDU的payload中。
  18. 一种资源指示发送方法,包括:
    接入点生成触发帧,所述触发帧包括公共信息部分,所述公共信息部分包含针对所有用户的公共信息;
    所述公共信息部分包含:子信道分配字段,用于指示将整个带宽划分成的多个子信道;和,用于指示所述子信道分配字段所划分出的子信 道中的用于随机接入的子信道的信息(I6);
    所述接入点发送所述触发帧。
  19. 一种资源指示接收方法,包括
    站点接收触发帧,所述触发帧括公共信息部分,所述公共信息部分包含针对所有用户的公共信息;
    所述公共信息部分包含:子信道分配字段,用于指示将整个带宽划分成的多个子信道;和,
    用于指示所述子信道分配字段所划分出的子信道中的用于随机接入的子信道的信息(I6);
    所述站点在需要进行随机接入传输时,使用所述触发帧指示的随机接入资源进行随机接入传输。
  20. 根据权利要求18或者19的方法,包括:
    所述用于指示所述子信道分配字段所划分出的子信道中的用于随机接入的子信道的信息为:用于指示第几个子信道是用于随机接入的信息(I6-1),或者,用于指示每个子信道是否用于随机接入的信息(I6-2)。
  21. 根据权利要求18-20任一的方法,包括:
    所述触发帧包括:用于指示每个随机接入子信道所占用的RU的数量的信息(I5);
    或者,
    每个随机接入子信道所占用的RU的数量为默认值。
  22. 根据权利要求18-19任一的方法,包括:
    所述触发帧包括:用于指示所述触发帧是否允许随机接入传输(I1);或者所述触发帧包括:用于指示是否整个传输带宽均用于随机接入的信息(I2)。
  23. 根据权利要求18-22任一所述的方法,
    所述触发帧还包括:传输时间段的指示。
  24. 一种资源指示发送方法,包括:
    接入点生成触发帧,所述触发帧包括:公共信息部分和用户信息部分;所述公共信息部分包含针对所有用户的公共信息,所述公共信息部分包含子信道分配字段,用于指示将整个带宽划分成的多个子信道;
    所述用户信息部分,用于针对所述子信道分配字段所指示的部分子信道,指示所述部分子信道中的每个子信道的配置信息;其中,所述子信道分配字段所指示的多个子信道中,在所述用户信息部分没有指示配置信息的剩余的子信道,用于随机接入;
    接入点发送所述触发帧。
  25. 一种资源指示接收方法,包括
    站点接收触发帧,所述触发帧括公共信息部分和位于所述公共信息部分之后的用户信息部分;
    所述公共信息部分包含针对所有用户的公共信息,所述公共信息部分包含:子信道分配字段,用于指示将整个带宽划分成的多个子信道;
    所述用户信息部分用于针对所述子信道分配字段所指示的部分子信道,指示所述部分子信道中的每个子信道的配置信息;其中,所述子信道分配字段所指示的多个子信道中,在所述用户信息部分没有指示配置信息的剩余的子信道,用于随机接入;
    所述站点在需要进行随机接入传输时,使用所述触发帧指示的随机接入资源进行随机接入传输。
  26. 根据权利要求24或者25的方法,包括:
    所述触发帧包括:用于指示每个随机接入子信道所占用的RU的数量的信息(I5)
    或者,
    每个随机接入子信道所占用的RU的数量为默认值。
  27. 根据权利要求24-25任一的方法,包括:
    所述触发帧包括:用于指示所述触发帧是否允许随机接入传输(I1);或者,
    所述触发帧包括:用于指示是否整个传输带宽均用于随机接入的信息(I2)。
  28. 根据权利要求24-25任一所述的方法,
    所述触发帧还包括:传输时间段的指示。
  29. 一种资源指示发送方法,包括:
    接入点生成触发帧,所述触发帧包括:公共信息部分和位于所述公共信息部分之后的用户信息部分;
    所述公共信息部分包含针对所有用户的公共信息,所述公共信息部分包含子信道分配字段,用于指示将整个带宽划分成的多个子信道;
    所述用户信息部分,用于针对子信道分配字段中分配的每一个子信道,指示所述每一个子信道将用于调度传输或者用于随机接入传输,以及包含:所述用于调度传输的子信道的配置信息,或者,用于随机接入传输时的所述用于随机接入的子信道占用的RU数;
    接入点发送所述触发帧。
  30. 一种资源指示接收方法,包括
    站点接收触发帧,
    所述触发帧包括:公共信息部分和位于所述公共信息部分之后的用户信息部分;
    所述公共信息部分包含针对所有用户的公共信息,所述公共信息部分包含子信道分配字段,用于指示将整个带宽划分成的多个子信道;
    所述用户信息部分,用于针对子信道分配字段中分配的每一个子信道,指示所述每一个子信道将用于调度传输或者用于随机接入传输,以及包含:所述用于调度传输的子信道的配置信息,或者,用于随机接入传输时的所述用于随机接入的子信道占用的RU数;
    所述站点在需要进行随机接入传输时,使用所述触发帧指示的随机接入资源进行随机接入传输。
  31. 根据权利要求29或者30的方法,包括:
    用于随机接入传输时的每个随机接入信道占用的RU数大于1。
  32. 根据权利要求29-30任一的方法,包括:
    所述用户信息部分,还包括:用于指示可以在用于随机接入传输的子信道进行随机接入的用户组的信息。
  33. 根据权利要求29-30任一的方法,包括:
    所述触发帧包括:用于指示所述触发帧是否允许随机接入传输(I1);或者,
    所述触发帧包括:用于指示是否整个传输带宽均用于随机接入的信息(I2)。
  34. 根据权利要求29-30任一所述的方法,
    所述触发帧还包括:传输时间段的指示。
  35. 一种应用于无线局域网的处理装置,
    被配置有:用于接收触发帧的模块,所述触发帧包括:用于指示所述触发帧是否允许随机接入传输的信息(I1);
    以及,用于在需要进行随机接入传输时,使用所述触发帧指示的随机接入资源进行随机接入传输的模块。
  36. 根据权利要求35的装置,所述触发帧包括:用于指示是否整个传输带宽均用于随机接入(I2)。
  37. 根据权利要求35或者36任一所述的装置,所述用于指示所述触发帧是否允许随机接入传输的信息(I1)或者所述用于指示是否整个传输带宽均用于随机接入(I2)位于所述触发帧的公共信息部分。
  38. 根据权利要求35-37任一所述的装置,
    所述触发帧还包括:传输时间段的指示。
  39. 一种应用于无线局域网的处理装置,
    被配置有:用于生成触发帧的模块,所述触发帧包括:用于指示用于随机接入的子信道的数量的信息(I3);或者,用于指示用于随机接入的资源单元RU的总数量的信息(I4);
    用于发送所述触发帧的模块。
  40. 一种应用于无线局域网的处理装置,
    被配置有:用于接收触发帧的模块,所述触发帧括:用于指示用于随机接入的子信道的数量的信息(I3);或者,用于指示用于随机接入的资源单元RU的总数量的信息(I4);
    用于在需要进行随机接入传输时,使用所述触发帧指示的随机接入资源进行随机接入传输的模块。
  41. 根据权利要求39或者40的装置,包括:
    所述触发帧包括:用于指示每个随机接入子信道所占用的RU的数量的信息(I5)
    或者,
    每个随机接入子信道所占用的RU的数量为默认值。
  42. 根据权利要求39-41任一的装置,包括:
    所述触发帧包括:用于指示所述触发帧是否允许随机接入传输(I1);或者,
    所述触发帧包括:用于指示是否整个传输带宽均用于随机接入的信息(I2)。
  43. 根据权利要求39-42任一的装置,包括:
    所述触发帧包括:子信道分配字段,用于仅针对所述触发帧已经指示的用于随机接入的RU以外的RU进行子信道分配指示。
  44. 根据权利要求39-42任一所述的装置,
    所述触发帧还包括:传输时间段的指示。
  45. 一种应用于无线局域网的处理装置,
    被配置有:用于生成触发帧的模块,所述触发帧包括:子信道分配字段,用于指示将整个带宽划分成的多个子信道;和,用于指示所述子信道分配字段所划分出的子信道中的用于随机接入的子信道的信息(I6);
    用于发送所述触发帧的模块。
  46. 一种应用于无线局域网的处理装置,
    被配置有:用于接收触发帧的模块,所述触发帧括:子信道分配字段,用于指示将整个带宽划分成的多个子信道;和,用于指示所述子信道分配字段所划分出的子信道中的用于随机接入的子信道的信息(I6);
    用于在需要进行随机接入传输时,使用所述触发帧指示的随机接入资源进行随机接入传输的模块。
  47. 根据权利要求45或者46的装置,包括:
    所述用于指示所述子信道分配字段所划分出的子信道中的用于随机接入的子信道的信息为:用于指示第几个子信道是用于随机接入的信息(I6-1),或者,用于指示每个子信道是否用于随机接入的信息(I6-2)。
  48. 根据权利要求45-47任一的装置,包括:
    所述触发帧包括:用于指示每个随机接入子信道所占用的RU的数量的信息(I5);
    或者,
    每个随机接入子信道所占用的RU的数量为默认值。
  49. 根据权利要求45-48任一的装置,包括:
    所述触发帧包括:用于指示所述触发帧是否允许随机接入传输(I1);或者所述触发帧包括:用于指示是否整个传输带宽均用于随机接入的信息(I2)。
  50. 根据权利要求45-49任一所述的装置,
    所述触发帧还包括:传输时间段的指示。
  51. 一种应用于无线局域网的处理装置,
    被配置有:用于生成触发帧的模块,所述触发帧包括:子信道分配字段,用于指示将整个带宽划分成的多个子信道;和,用户信息部分,用于针对所述子信道分配字段所指示的部分子信道,指示所述部分子信道中的每个子信道的配置信息;其中,所述子信道分配字段所指示的多个子信道中,在所述用户信息部分没有指示配置信息的剩余的部分子信道,用于随机接入;
    用于发送所述触发帧的模块。
  52. 一种应用于无线局域网的处理装置,
    被配置有:用于接收触发帧的模块,所述触发帧括:子信道分配字段,用于指示将整个带宽划分成的多个子信道;和,用户信息部分,用于针对所述子信道分配字段所指示的部分子信道,指示所述部分子信道中的每个子信道的配置信息;其中,所述子信道分配字段所指示的多个子信道中,在所述用户信息部分没有指示配置信息的剩余的部分子信道,用于随机接入;
    用于在需要进行随机接入传输时,使用所述触发帧指示的随机接入资源进行随机接入传输的模块。
  53. 根据权利要求51或者52的装置,包括:
    所述触发帧包括:用于指示每个随机接入子信道所占用的RU的数量的信息(I5)
    或者,
    每个随机接入子信道所占用的RU的数量为默认值。
  54. 根据权利要求51-53任一的装置,包括:
    所述触发帧包括:用于指示所述触发帧是否允许随机接入传输(I1);或者,
    所述触发帧包括:用于指示是否整个传输带宽均用于随机接入的信息(I2)。
  55. 根据权利要求51-54任一所述的装置,
    所述触发帧还包括:传输时间段的指示。
  56. 一种应用于无线局域网的处理装置,
    被配置有:用于生成触发帧的模块,所述触发帧包括:子信道分配字段,用于指示将整个带宽划分成的多个子信道;和,用户信息部分,用于针对子信道分配字段中分配的每一个子信道,指示所述每一个子信道将调度传输或者随机接入传输,以及,用于调度传输时的配置信息,或者,用于随机接入传输时的每个随机接入信道占用的RU数;
    用于发送所述触发帧的模块。
  57. 一种应用于无线局域网的处理装置,
    被配置有:用于接收触发帧的模块,所述触发帧包括:子信道分配字段,用于指示将整个带宽划分成的多个子信道;和,用户信息部分,用于针对子信道分配字段中分配的每一个子信道,指示所述每一个子信道将调度传输或者随机接入传输,以及,用于调度传输时的配置信息,或者,用于随机接入传输时的每个随机接入信道占用的RU数;
    用于在需要进行随机接入传输时,使用所述触发帧指示的随机接入资源进行随机接入传输的模块。
  58. 根据权利要求56或者57的装置,包括:
    用于随机接入传输时的每个随机接入信道占用的RU数大于1。
  59. 根据权利要求56-58任一的方法,包括:
    所述用户信息部分,还包括:用于指示可以在用于随机接入传输的子信道进行随机接入的用户组的信息。
  60. 根据权利要求56-59任一的装置,包括:
    所述触发帧包括:用于指示所述触发帧是否允许随机接入传输(I1); 或者,
    所述触发帧包括:用于指示是否整个传输带宽均用于随机接入的信息(I2)。
  61. 根据权利要求56-60任一所述的装置,
    所述触发帧还包括:传输时间段的指示。
PCT/CN2016/076000 2015-05-05 2016-03-09 资源指示的处理方法、处理装置、接入点和站点 WO2016177089A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US16/124,971 US10993259B2 (en) 2016-03-09 2018-09-07 Resource indication processing method, processing apparatus, access point, and station

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNPCT/CN2015/078332 2015-05-05
CN2015078332 2015-05-05

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US16/124,971 Continuation US10993259B2 (en) 2016-03-09 2018-09-07 Resource indication processing method, processing apparatus, access point, and station

Publications (1)

Publication Number Publication Date
WO2016177089A1 true WO2016177089A1 (zh) 2016-11-10

Family

ID=57218054

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2016/076000 WO2016177089A1 (zh) 2015-05-05 2016-03-09 资源指示的处理方法、处理装置、接入点和站点

Country Status (1)

Country Link
WO (1) WO2016177089A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210368549A1 (en) * 2016-03-04 2021-11-25 Panasonic Intellectual Property Management Co., Ltd. Apparatus and method for prioritization of random access in a multi-user wireless communication system
US11696324B2 (en) 2017-02-21 2023-07-04 Panasonic Intellectual Property Corporation Of America Communication apparatus and communication method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101193421A (zh) * 2006-11-23 2008-06-04 华为技术有限公司 小区前向接入信道状态下随机接入控制方法、***及装置
US20100210243A1 (en) * 2007-10-10 2010-08-19 Dragan Vujcic High speed access system and method in a mobile communications network
CN102595635A (zh) * 2011-03-31 2012-07-18 北京新岸线无线技术有限公司 用于接入无线网络的方法及装置
CN102763481A (zh) * 2010-02-22 2012-10-31 瑞典爱立信有限公司 用于无线通信***中基于竞争的上行链路传送的方法和设备

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101193421A (zh) * 2006-11-23 2008-06-04 华为技术有限公司 小区前向接入信道状态下随机接入控制方法、***及装置
US20100210243A1 (en) * 2007-10-10 2010-08-19 Dragan Vujcic High speed access system and method in a mobile communications network
CN102763481A (zh) * 2010-02-22 2012-10-31 瑞典爱立信有限公司 用于无线通信***中基于竞争的上行链路传送的方法和设备
CN102595635A (zh) * 2011-03-31 2012-07-18 北京新岸线无线技术有限公司 用于接入无线网络的方法及装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210368549A1 (en) * 2016-03-04 2021-11-25 Panasonic Intellectual Property Management Co., Ltd. Apparatus and method for prioritization of random access in a multi-user wireless communication system
US11706815B2 (en) * 2016-03-04 2023-07-18 Panasonic Intellectual Property Management Co., Ltd. Apparatus and method for prioritization of random access in a multi-user wireless communication system
US11974330B2 (en) 2016-03-04 2024-04-30 Panasonic Intellectual Property Management Co., Ltd. Apparatus and method for prioritization of random access in a multi-user wireless communication system
US11696324B2 (en) 2017-02-21 2023-07-04 Panasonic Intellectual Property Corporation Of America Communication apparatus and communication method
US11985698B2 (en) 2017-02-21 2024-05-14 Panasonic Intellectual Property Corporation Of America Communication apparatus and communication method

Similar Documents

Publication Publication Date Title
JP7051914B2 (ja) 無線ローカルエリアネットワーク情報を送信するための方法および装置
CN108347776B (zh) 一种通信***中资源分配的方法及设备
CN106487737B (zh) 传输无线局域网中的长训练序列的方法及装置
US10993259B2 (en) Resource indication processing method, processing apparatus, access point, and station
WO2018171651A1 (zh) 资源调度的方法和装置
WO2010078843A1 (zh) 资源分配方法、网络设备和无线***
WO2016201627A1 (zh) 资源分配的方法、发送端设备和接收端设备
WO2017054777A1 (zh) 无线通信中的一种降低网络延迟的方法和装置
US11258571B2 (en) Downlink control information transmission method, apparatus, and system
WO2016029416A1 (zh) 资源分配的方法、接入点和站点
WO2019153853A1 (zh) 资源指示方法、用户设备及网络侧设备
WO2016177089A1 (zh) 资源指示的处理方法、处理装置、接入点和站点
WO2021197225A1 (zh) 一种通信方法和装置
WO2017020283A1 (zh) 生成he-ltf序列方法、处理装置、接入点和站点
WO2019179105A1 (zh) 无线通信方法、用户设备和网络设备
WO2016074168A1 (zh) 资源指示的处理方法、计算机可读介质、接入点和站点
CN107615852A (zh) 资源调度的方法、装置和设备
WO2014000188A1 (zh) 时频资源分配消息发送方法、解析方法和装置及***
WO2016191986A1 (zh) 一种数据处理方法及装置
WO2016004557A1 (zh) 传输信息的方法、接入点和站点
CN114650564A (zh) 一种协议数据单元ppdu的传输方法和装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16789083

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16789083

Country of ref document: EP

Kind code of ref document: A1