WO2016183782A1 - 一种终端设备、网络设备及数据传输方法 - Google Patents

一种终端设备、网络设备及数据传输方法 Download PDF

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Publication number
WO2016183782A1
WO2016183782A1 PCT/CN2015/079216 CN2015079216W WO2016183782A1 WO 2016183782 A1 WO2016183782 A1 WO 2016183782A1 CN 2015079216 W CN2015079216 W CN 2015079216W WO 2016183782 A1 WO2016183782 A1 WO 2016183782A1
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WIPO (PCT)
Prior art keywords
terminal device
resource
resource block
reserved
information
Prior art date
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PCT/CN2015/079216
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English (en)
French (fr)
Inventor
李明超
华尧
施艺
韩广林
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华为技术有限公司
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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
Priority to JP2017560211A priority Critical patent/JP6505870B2/ja
Priority to EP19183637.8A priority patent/EP3614790A1/en
Priority to EP15892161.9A priority patent/EP3291634B1/en
Priority to MX2017014535A priority patent/MX2017014535A/es
Priority to PCT/CN2015/079216 priority patent/WO2016183782A1/zh
Priority to CN201580071221.0A priority patent/CN107113914B/zh
Publication of WO2016183782A1 publication Critical patent/WO2016183782A1/zh
Priority to US15/816,525 priority patent/US10440755B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
    • H04W74/0841—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure with collision treatment
    • H04W74/085—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure with collision treatment collision avoidance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H04W4/46—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for vehicle-to-vehicle communication [V2V]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/002—Transmission of channel access control information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]

Definitions

  • the present invention relates to the field of communications, and in particular, to a terminal device, a network device, and a data transmission method.
  • the vehicle can communicate with the vehicle (Vehicle to Vehicle, V2V) to obtain V2V information including other vehicle speeds, driving directions, specific positions, and emergency braking. According to the obtained V2V information, the road condition information is obtained, so that the driver can better perceive the traffic condition outside the line of sight according to the acquired road condition information, thereby prejudging the dangerous situation and timely avoiding it.
  • V2V Vehicle to Vehicle
  • LTE Long Term Evolution
  • D2D Device to Device
  • V2V information can also be transmitted between vehicles and vehicles by using D2D technology. Specifically, when the vehicle uses the D2D technology to perform V2V information transmission, first, a resource block is randomly selected in the resource pool, and then the V2V information to be transmitted is transmitted by using the selected resource block.
  • the vehicle since the V2V information transmission is performed by using the D2D technology, the vehicle adopts a free-competition mechanism of random transmission, that is, randomly selecting one resource block in the resource pool as a resource required for transmitting V2V information,
  • this mechanism may exist in which multiple neighboring vehicles select the same resource block for their V2V information transmission, which may cause collision of transmission resources, so that other vehicles cannot successfully demodulate the V2V information transmitted by the vehicle, and
  • the collision of transmission resources becomes more serious, resulting in a problem of lower transmission efficiency.
  • the invention provides a terminal device, a network device and a data transmission method, which solves the problem that the transmission efficiency is low due to collision of transmission resources.
  • a first aspect of the present invention provides a first terminal device, including:
  • a sending unit configured to send, by using the first resource block, a first media access control MAC protocol data unit PDU, where the first MAC PDU carries a first reserved indication field, where the first terminal device is used to indicate that the first terminal device
  • the first resource block is reserved for reservation;
  • a receiving unit configured to receive a second MAC PDU that is sent by the second terminal device set by using the second resource block, where the second terminal device set includes at least one second terminal device, where the second MAC PDU carries the first a resource feedback field, configured to indicate that the first resource block is successfully reserved;
  • the first resource block used by the PDU is a resource block used for transmitting a new MAC PDU
  • the sending unit is further configured to send the new MAC PDU by using the first resource block determined by the determining unit.
  • the second MAC PDU received by the receiving unit further carries a second reserved indication field, which is used to instruct the second terminal device to reserve the second resource block.
  • the first resource feedback field carried in the second MAC PDU received by the receiving unit is used to indicate the A resource block was not successfully reserved.
  • the determining unit is further configured to: according to the first resource feedback domain and the second terminal device set sent by one of the second terminal devices in the second terminal device set received by the receiving unit
  • the second reservation indication field sent by the second terminal device determines, from the contention resource pool, that the new resource block is a resource block used for sending the new MAC PDU;
  • the sending unit is further configured to use the new resource determined by the determining unit
  • the block sends the new MAC PDU.
  • the method further includes:
  • An acquiring unit configured to acquire configuration information, where the sending information includes: the reservation indication information, before the sending, by the sending unit, the first media access control MAC protocol data unit PDU by using the first resource block;
  • the determining unit is further configured to determine a timing time of the timer according to the reservation indication information acquired by the acquiring unit, where the timing is that the first terminal device reserves the first resource block Length of time;
  • Activating unit configured to start the timer when the sending unit sends the first MAC PDU by using the first resource block
  • the determining unit is specifically configured to: when the timer started by the starting unit does not stop timing, according to one of the second terminal devices that are received by the receiving unit,
  • the first resource feedback field determines that the first resource block used by the sending unit to send the first MAC PDU is a resource block used for sending the new MAC PDU.
  • the determining unit is specifically configured to: according to the second terminal device in the second terminal device set received by the receiving unit, when the timer started by the starting unit stops counting, Determining, by the first resource feedback domain and the second reservation indication domain sent by all the second terminal devices in the second terminal device set, determining a new resource block from the contention resource pool to send the new The resource block used by the MAC PDU.
  • the method further includes:
  • An acquiring unit configured to acquire configuration information, where the sending information includes: the reservation indication information, before the sending, by the sending unit, the first media access control MAC protocol data unit PDU by using the first resource block;
  • the determining unit is further configured to determine a timing time of the timer according to the reservation indication information acquired by the acquiring unit, where the timing is that the first terminal device reserves the first resource block Length of time;
  • Activating unit configured to start the timer when the sending unit sends the first MAC PDU by using the first resource block
  • the determining unit is specifically configured to: when the timer started by the starting unit stops counting, or when the timer started by the starting unit does not stop timing, according to the second received by the receiving unit
  • the reservation indication information acquired by the acquiring unit includes indication information of a reserved duration, and is used to indicate a duration that can be reserved. Range of time or duration;
  • the determining unit is specifically configured to:
  • the method further includes:
  • An acquiring unit configured to acquire configuration information, where the sending information includes: the reservation indication information, before the sending, by the sending unit, the first media access control MAC protocol data unit PDU by using the first resource block;
  • the determining unit is further configured to determine a reserved duration according to the reservation indication information acquired by the acquiring unit, where the reserved duration is that the first terminal device The length of time a resource block is reserved;
  • the first reservation indication field carried in the first MAC PDU sent by the sending unit is further used to indicate a time parameter, where the time parameter is greater than or equal to 0, and the time parameter is used to indicate the reserved duration;
  • the determining unit is specifically configured to: when the time parameter is not 0, according to the first resource feedback sent by one of the second terminal devices in the second terminal device set received by the receiving unit And determining, by the sending unit, the first resource block used by the sending unit to send the first MAC PDU as a resource block used for sending the new MAC PDU.
  • the determining unit is specifically configured to: when the time parameter is 0, according to the first resource feedback domain sent by one of the second terminal devices in the second terminal device set received by the receiving unit And the second reservation indication field sent by all the second terminal devices in the second terminal device set, determining, from the contention resource pool, a new resource block as a resource block used by sending the new MAC PDU .
  • the method further includes:
  • An acquiring unit configured to acquire configuration information, where the sending information includes: the reservation indication information, before the sending, by the sending unit, the first media access control MAC protocol data unit PDU by using the first resource block;
  • the determining unit is further configured to determine, according to the reservation indication information that is obtained by the acquiring unit, a reserved duration, where the reserved duration is that the first terminal device reserves the first resource block. length of time;
  • the first reservation indication field carried in the first MAC PDU sent by the sending unit is further used to indicate a time parameter, where the time parameter is greater than or equal to 0, and the time parameter is used to indicate the reserved duration;
  • the determining unit is specifically configured to: when the time parameter is 0, or the time parameter is not 0, according to the second terminal device set received by the receiving unit
  • the resource pool is determined to be a resource block used for transmitting the new MAC PDU.
  • the method further includes:
  • a configuration unit configured to configure the first reserved indication field according to the reserved duration determined by the determining unit, before the sending unit sends the first medium access control MAC protocol data unit PDU by using the first resource block .
  • the reservation indication information acquired by the acquiring unit includes indication information of a reserved duration, and is used to indicate a duration that can be reserved.
  • the duration range, or the reservation indication information acquired by the acquiring unit includes the indication information of the reserved duration and the length information of the carrying reservation indication domain;
  • the determining unit is specifically configured to:
  • the reservation indication information acquired by the acquiring unit includes the indication information of the reserved duration, and the indication information of the reserved duration is used to indicate the length of time that can be reserved, according to the obtained by the acquiring unit
  • the indication information of the reserved duration determines that the reservable duration is the reserved duration
  • the reservation indication information acquired by the acquiring unit includes the indication information of the reserved duration, and the indication information of the reserved duration is used to indicate the reservable duration range, according to the acquiring unit,
  • the indication information of the reserved duration determines whether any one of the durations of the reservable duration is the reserved duration;
  • the reservation indication information that is obtained by the acquiring unit includes the indication information of the reserved duration and the length information of the reserved reservation indication field, the indication information and the carrying pre-prepared information obtained by the acquiring unit according to the reserved duration The length information of the leaving indication field determines the reserved duration.
  • the method further includes:
  • a monitoring unit configured to: after the sending unit sends the first media access control MAC protocol data unit PDU by using the first resource block, listening to the contention pool;
  • the determining unit is further configured to determine a second resource feedback domain according to a reservation condition of the resource block in the contention pool that is monitored by the intercepting unit, where the second resource feedback field is used to indicate that the a reservation of resource blocks in the contention pool of the first MAC PDU;
  • the second resource feedback field is also carried in the first MAC PDU sent by the sending unit by using the first resource block.
  • the configuration information acquired by the acquiring unit further includes: resource feedback information;
  • the determining unit is configured to generate the second resource feedback domain according to the resource feedback information acquired by the acquiring unit and a reservation condition of a resource block in the contention pool that is monitored by the intercepting unit .
  • the resource feedback information acquired by the acquiring unit includes: carrying condition information of a resource feedback domain and/or carrying a resource feedback domain. Length information
  • the determining unit is specifically configured to:
  • the resource feedback information acquired by the acquiring unit includes the condition information of the carrying resource feedback domain
  • the resource feedback information acquired by the acquiring unit includes the length information of the carrying resource feedback domain
  • the length information of the carrying resource feedback domain included in the resource feedback information acquired by the acquiring unit, and the The second resource feedback domain is generated by the reservation of the resource block in the contention pool that is monitored by the monitoring unit;
  • the resource feedback information acquired by the acquiring unit includes the condition information of the carrying resource feedback domain and the length information of the carrying resource feedback domain, determining that the carrying resource feedback obtained by the acquiring unit is satisfied is determined.
  • Condition information of the domain, according to And the second resource feedback domain is generated by the length information of the resource feedback domain that is included in the resource feedback information that is acquired by the acquiring unit and the reservation of the resource block in the contention pool that is monitored by the monitoring unit. .
  • the acquiring unit is specifically configured to acquire the configuration information that is configured in advance, or receive the configuration information that is sent by the network device.
  • the first reservation indication field is included in a MAC header of the first MAC PDU sent by the sending unit;
  • the MAC header further includes an extension indication field, configured to indicate whether the first MAC PDU carries the second resource feedback domain, and when the extension indication field indicates that the first MAC PDU carries the second resource When the domain is fed back, the second resource feedback field is included in a MAC header of the first MAC PDU sent by the sending unit.
  • the first reserved indication field includes a payload payload of the first MAC PDU sent by the sending unit.
  • the MAC header of the first MAC PDU sent by the sending unit includes a MAC sub-header, and is used to indicate that the data corresponding to the MAC sub-header is the first reserved indication field;
  • the MAC header of the first MAC PDU sent by the sending unit includes a MAC sub-header for indicating the data corresponding to the MAC sub-header in the payload field of the first MAC PDU sent by the sending unit. Determining a domain for the first reservation and the second resource feedback domain.
  • a second aspect of the present invention provides a network device, including:
  • a sending unit configured to send configuration information to the first terminal device; the configuration information includes reservation indication information.
  • the reservation indication information that is sent by the sending unit includes: indication information of a reserved duration, which is used to indicate a duration or duration range that can be reserved;
  • the reservation indication information sent by the sending unit includes: indication information of the reserved duration and length information of the reserved reservation indication field.
  • the configuration information sent by the sending unit further includes: resource feedback information; the resource feedback information includes: condition information carrying a resource feedback domain and/or length information of a resource feedback domain.
  • the sending unit is specifically configured to send the configuration information to the first terminal device by using system information or radio resource control RRC signaling.
  • a third aspect of the present invention provides a data transmission method, including:
  • the first terminal device receives a second MAC PDU that is sent by the second terminal device set by using the second resource block; the second terminal device set includes at least one second terminal device, where the second MAC PDU carries the first a resource feedback field, configured to indicate that the first resource block is successfully reserved;
  • the first terminal device Determining, by the first terminal device, the first resource block as a resource block used for sending a new MAC PDU according to the first resource feedback field sent by the second terminal device in the second set of terminal devices ;
  • the second MAC PDU further includes a second reserved indication field, where the second terminal device is configured to reserve the second resource block.
  • the first resource feedback domain is used to indicate that the first resource block is not successfully reserved, and the method further includes:
  • the second reservation indication field determining, from the contention resource pool, that the new resource block is a resource block used for sending the new MAC PDU;
  • the first terminal device sends the new MAC PDU by using the new resource block.
  • the method before the first terminal device sends the first medium access control MAC protocol data unit PDU by using the first resource block, the method also includes:
  • the first terminal device acquires configuration information, where the configuration information includes: reservation indication information;
  • the timing time is a length of time that the first terminal device reserves the first resource block
  • the first terminal device When the first terminal device sends the first MAC PDU by using the first resource block, the first terminal device starts the timer;
  • Determining, by the first terminal device, the first resource block as a resource block used for sending a new MAC PDU according to the first resource feedback field sent by the second terminal device in the second set of terminal devices include:
  • the method further includes:
  • the first terminal device When the timer stops counting, the first terminal device is configured according to the first resource feedback domain and the second terminal device set sent by one of the second terminal devices in the second terminal device set.
  • the second reservation indication field sent by all the second terminal devices determines that the new resource block is a resource block used for sending the new MAC PDU from the contention resource pool.
  • the method before the first terminal device sends the first medium access control MAC protocol data unit PDU by using the first resource block, the method also includes:
  • the first terminal device acquires configuration information, where the configuration information includes: reservation indication information;
  • the timing time is a length of time that the first terminal device reserves the first resource block
  • the first terminal device When the first terminal device sends the first MAC PDU by using the first resource block, the first terminal device starts the timer;
  • a new resource block from the contention resource pool is a resource block used for sending the new MAC PDU, including:
  • the first terminal device When the timer stops counting, or the timer does not stop timing, the first terminal device sends the first resource feedback domain according to one of the second terminal devices in the second terminal device set. And the second reservation indication field sent by all the second terminal devices in the second terminal device set, determining, by the contention resource pool, the new resource block to send the new MAC PDU The resource block used.
  • the reservation indication information includes indication information of a reserved duration, and is used to indicate that the reservation is predictable.
  • Determining, by the first terminal device, the timing of the timer according to the reservation indication information including:
  • the first terminal device determines, according to the indication information of the reserved duration, that the reservable duration is the timing of the timer. ;or,
  • the first terminal device determines, according to the indication information of the reserved duration, any one of the durations of the reservable duration The timing of the timer.
  • the method before the first terminal device sends the first medium access control MAC protocol data unit PDU by using the first resource block, the method also includes:
  • the first terminal device acquires configuration information, where the configuration information includes: reservation indication information;
  • the reserved duration is a length of time that the first terminal device reserves the first resource block
  • the first reservation indication field is further configured to indicate a time parameter, where the time parameter is greater than or equal to 0, and the time parameter is used to indicate the reserved duration;
  • Determining, by the first terminal device, the first resource block as a resource block used for sending a new MAC PDU according to the first resource feedback field sent by the second terminal device in the second set of terminal devices include:
  • the first terminal device determines the first resource block according to the first resource feedback domain sent by one of the second terminal devices in the second terminal device set. A resource block used to send the new MAC PDU.
  • the method further includes:
  • the first terminal device sends the first resource feedback field and the second terminal device according to one of the second terminal device sets.
  • the second reservation indication field sent by all the second terminal devices in the second terminal device set determines, from the contention resource pool, that the new resource block is a resource block used for sending the new MAC PDU.
  • the method before the first terminal device sends the first medium access control MAC protocol data unit PDU by using the first resource block, the method also includes:
  • the first terminal device acquires configuration information, where the configuration information includes: reservation indication information;
  • the reserved duration is a length of time that the first terminal device reserves the first resource block
  • the first reservation indication field is further configured to indicate a time parameter, where the time parameter is greater than or equal to 0, and the time parameter is used to indicate the reserved duration;
  • a new resource block from the contention resource pool is a resource block used for sending the new MAC PDU, including:
  • the first terminal device sends the first resource feedback field according to one of the second terminal devices in the second terminal device set. And the second reservation indication field sent by all the second terminal devices in the second terminal device set, determining, by the contention resource pool, the new resource block to send the new MAC PDU The resource block used.
  • the method before the first terminal device sends the first medium access control MAC protocol data unit PDU by using the first resource block, the method further includes:
  • the first terminal device configures the first reserved indication field according to the reserved duration.
  • the reservation indication information includes the indication information of the reserved duration, and is used to indicate the duration or duration range that can be reserved, or the reservation indication information includes the indication information of the reserved duration and the carrying reservation. Indicate the length information of the domain;
  • Determining, by the first terminal device, the reserved duration according to the reservation indication information including:
  • the first terminal device determines, according to the indication information of the reserved duration
  • the reservable duration is the reserved duration
  • the reservation indication information includes the indication information of the reserved duration, and the indication information of the reserved duration is used to indicate the reservable duration range, the first terminal device according to the indication information of the reserved duration Determining any one of the durations of the reservable duration as the reserved duration;
  • the first terminal device determines, according to the indication information of the reserved duration and the length information of the reserved reservation indication domain. Describe the length of time.
  • the method before the first terminal device sends the first medium access control MAC protocol data unit PDU by using the first resource block, the method also includes:
  • the first terminal device monitors the contention pool, and determines a second resource feedback field according to the reserved condition of the resource block in the contending resource pool; the second resource feedback field is used to indicate that the a reservation of resource blocks in the contention pool of the first MAC PDU;
  • the second resource feedback field is also carried in the first MAC PDU that is sent by the first terminal device by using the first resource block.
  • the configuration information further includes: resource feedback information
  • Determining the second resource feedback domain according to the reserved condition of the resource block in the contending resource pool including:
  • the first terminal device generates the second resource feedback domain according to the resource feedback information and the reserved condition of the resource block in the contention pool.
  • the resource feedback information includes: condition information carrying a resource feedback domain and/or length information of a resource feedback domain;
  • the first terminal device generates the second resource feedback domain according to the resource feedback information and the reserved resource block in the contention pool, including:
  • the resource feedback information includes the condition information of the resource feedback domain
  • the first terminal device determines that the condition information of the bearer resource feedback domain is met, according to the preset length information of the resource feedback domain Storing the reserved condition of the resource block in the contention pool of the contention to generate the second resource feedback field
  • the first terminal device When the resource feedback information includes the length information of the resource feedback domain, the first terminal device according to the resource feedback information includes the length information of the resource feedback domain and the monitored resource pool in the competition resource pool. Resetting the resource block to generate the second resource feedback domain;
  • the resource feedback information includes the condition information of the carrying resource feedback domain and the length information of the carrying resource feedback domain
  • the first terminal device determines that the condition information of the carrying resource feedback domain is met
  • the The second resource feedback domain is generated by the length information of the resource feedback domain included in the resource feedback information and the reserved resource block in the contention pool.
  • the acquiring, by the first terminal device, the configuration information includes:
  • the first terminal device acquires the pre-configured configuration information
  • the first terminal device receives the configuration information sent by the network device.
  • the first reservation indication field is included in a MAC header of the first MAC PDU
  • the MAC header further includes an extension indication field, configured to indicate whether the first MAC PDU carries the second resource feedback domain, and when the extension indication field indicates that the first MAC PDU carries the second resource.
  • the second resource feedback domain when the domain is fed back Included in the MAC header of the first MAC PDU.
  • the first reservation indication field is included in a payload payload field of the first MAC PDU, and a MAC of the first MAC PDU
  • the header includes a MAC sub-header, and is used to indicate that the data corresponding to the MAC sub-header is the first reserved indication field;
  • the first reservation indication domain and the second resource feedback domain are included in the first MAC PDU
  • the MAC header of the first MAC PDU includes a MAC sub-header, and is used to indicate that the data corresponding to the MAC sub-header is the first reserved indication domain and the second resource feedback domain.
  • a fourth aspect of the present invention provides a data transmission method, including:
  • the network device sends configuration information to the first terminal device; the configuration information includes reservation indication information.
  • the reservation indication information includes: indication information of a reserved duration, which is used to indicate a duration or duration range that can be reserved;
  • the reservation indication information includes: indication information of the reserved duration and length information of the reserved reservation indication domain.
  • the configuration information further includes: resource feedback information; the resource feedback information includes: condition information carrying a resource feedback domain and/or length information of a resource feedback domain.
  • the sending, by the network device, the configuration information to the first terminal device includes:
  • the network device sends the configuration information to the first terminal device by using system information or radio resource control RRC signaling.
  • the first terminal device sends, by using the first resource block, the first MAC that carries the first reserved indication field, which is used to indicate that the first resource block is reserved. And after receiving the second MAC PDU that is sent by the second resource block and is configured to indicate that the first resource block is successfully reserved by the first resource feedback domain, according to the second terminal device set, The first resource feedback field carried by the second MAC PDU sent by a second terminal device determines that the first resource block is a resource block used for transmitting a new MAC PDU, and sends a new MAC PDU through the first resource block.
  • the first terminal device indicates that the first resource block is reserved by using the first reserved indication field, and determines that the first resource block is successfully reserved according to the resource feedback field carried in the received MAC PDU sent by the other terminal device. That is, when there is no resource collision, the first resource block is continuously used for the transmission of the new MAC PDU, which effectively reduces the collision rate of the transmission resource and improves the transmission efficiency.
  • Figure 1 is a schematic diagram of communication between vehicles using V2V technology
  • FIG. 2 is a schematic diagram of communication between user equipments using D2D technology
  • Figure 3 is a schematic diagram of communication between vehicles using D2D technology
  • FIG. 4 is a schematic diagram of a format of a media access control protocol data unit provided by the prior art
  • FIG. 5 is a schematic structural diagram of a first terminal device according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of another first terminal device according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a network device according to another embodiment of the present invention.
  • FIG. 8 is a schematic flowchart of a data transmission method according to another embodiment of the present invention.
  • FIG. 9 is a schematic flowchart of a data transmission method according to another embodiment of the present invention.
  • FIG. 10 is a schematic flowchart of a data transmission method according to another embodiment of the present invention.
  • FIG. 11 is a schematic diagram of a format of a first MAC PDU according to another embodiment of the present invention.
  • FIG. 12 is a schematic diagram of another format of a first MAC PDU according to another embodiment of the present invention.
  • FIG. 13 is a schematic diagram of another format of a first MAC PDU according to another embodiment of the present disclosure.
  • FIG. 14 is a schematic diagram of another format of a first MAC PDU according to another embodiment of the present invention.
  • FIG. 15 is a schematic flowchart of a data transmission method according to another embodiment of the present invention.
  • FIG. 16 is a schematic diagram of a contention pool of a competition according to another embodiment of the present invention.
  • FIG. 17 is a schematic structural diagram of a first terminal device according to another embodiment of the present invention.
  • FIG. 18 is a schematic structural diagram of a network device according to another embodiment of the present invention.
  • GSM Global System for Mobile communications
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access Wireless
  • FDMA Frequency Division Multiple Addressing
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA single carrier FDMA
  • the user equipment may be a wireless terminal or a wired terminal, and the wireless terminal may be a device that provides voice and/or data connectivity to the user, a handheld device with wireless connectivity, or other processing device connected to the wireless modem.
  • the wireless terminal can communicate with one or more core networks via a radio access network (English: Radio Access Network, RAN for short), and the wireless terminal can be a mobile terminal, such as a mobile phone (or "cellular" phone) and has
  • the computer of the mobile terminal for example, may be a portable, pocket, handheld, computer built-in or in-vehicle mobile device that exchanges language and/or data with the wireless access network.
  • a wireless terminal may also be called a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, an access point, or an access point.
  • Remote Terminal, Access Terminal, User Terminal, User Agent, and User Equipment English: User Equipment, UE for short).
  • a base station e.g., an access point
  • the base station can refer to a device in an access network that communicates with a wireless terminal over one or more sectors over an air interface.
  • the base station can be used to convert the received air frame and the IP packet to each other as a relationship between the wireless terminal and the rest of the access network.
  • a router wherein the rest of the access network may include an Internet Protocol (IP) network.
  • IP Internet Protocol
  • the base station can also coordinate attribute management of the air interface.
  • the base station may be a base station in GSM or CDMA (English: Base Transceiver Station, BTS for short), or a base station (NodeB) in WCDMA, or an evolved base station in LTE (English: evolutional Node B, Abbreviation: NodeB or eNB or e-NodeB), this application is not limited.
  • GSM Global System for Mobile Communications
  • CDMA Code Division Multiple Access
  • NodeB base station
  • LTE Evolutional Node B, Abbreviation: NodeB or eNB or e-NodeB
  • system and “network” are used interchangeably herein.
  • vehicles can obtain road condition information or receive information services in time through V2V communication.
  • the specific process of the vehicle acquiring the road condition information is that the vehicle 1 broadcasts V2V information such as the vehicle speed, the traveling direction, the specific position, and whether the emergency brake is stepped through V2V communication, and is now around the vehicle 1 .
  • the vehicle that is, the vehicle 2 and the vehicle 3, can receive the V2V information broadcast by the vehicle 1, and after the vehicle 2 and the vehicle 3 successfully receive the V2V information broadcast by the vehicle 1, the vehicle speed, the traveling direction, the specific position, whether or not
  • the driver can pre-judg the dangerous situation according to the road condition information and avoid it in time to avoid the occurrence of traffic accidents.
  • V2V information transmitted by the vehicle and the vehicle using V2V communication is called basic safety information in the wireless access in vehicular environments (WAVE) protocol in the United States (English: Basic Safety Message, Abbreviation: BSM), called Intelligent Cooperative Awareness Message (CAM) or Decentralized Environmental Notification (English): In Intelligent Transportation System (English: Intelligent Transportation System, ITS) Message, referred to as: DEMN).
  • WAVE wireless access in vehicular environments
  • BSM Basic Safety Message
  • CAM Intelligent Cooperative Awareness Message
  • DEMN Decentralized Environmental Notification
  • LTE is the current mainstream wireless communication technology
  • the D2D technology in LTE supports direct communication between terminal devices (for example, direct communication between UE1 and UE2 as shown in FIG. 2), and V2V communication also It belongs to direct communication between devices. Therefore, as shown in FIG. 3, V2V information can be transmitted through D2D technology.
  • D2D technology can be divided into D2D exploration (discovery) and D2D Communication (communication) two types of technologies, and both of these technologies have distributed transmission modes.
  • the distributed transmission mode of D2D discovery is called D2D discovery type (type) 1
  • D2D. Communication mode (mode) 2 2.
  • network resources are divided into one or more resource pools.
  • a terminal device needs to transmit data
  • the data is randomly transmitted using a random-sentence mechanism, that is, a resource needs to be randomly selected in the resource pool. Blocks are used for the transmission of data.
  • vehicle 1 needs to transmit V2V information.
  • the network resource is divided into two parts: a scheduling resource (English: Scheduiing Assignment, SA) resource pool and a data resource pool.
  • SA Scheduiing Assignment
  • the specific process of the vehicle 1 for transmitting V2V information is: when the vehicle 1 has V2V information generated, firstly, one SA resource block is randomly selected in the SA resource pool to broadcast SA information, where The SA information is used to indicate the time-frequency resource location and the modulation and coding mode in a data resource pool.
  • the time-frequency resource location indicated by the SA information is also randomly selected by the vehicle 1 from the data resource pool; then the vehicle 1 is in the data resource pool.
  • the generated V2V information is broadcasted according to the modulation and coding mode indicated by the SA information.
  • the vehicle around the vehicle 1 such as the vehicle 2 retrieves the SA information broadcast by the vehicle 1 in the SA resource pool and decodes successfully, the vehicle 2 can follow the time-frequency resource location of the data resource pool indicated by the SA information.
  • the V2V information broadcast by the vehicle 1 is received and decoded in accordance with the modulation and coding scheme indicated by the SA information to successfully receive the V2V information broadcast by the vehicle 1.
  • the V2V information sent by the vehicle 1 is specifically included in a media access control (English: Media Access Control, MAC) protocol data unit (English: Protocol Data Unit, PDU for short), and the format of the MAC PDU is as shown in the figure. 4, wherein the source identifier (English: identify, abbreviated: ID) field, used to indicate the ID of the sender (such as vehicle 1), the destination ID field, used to indicate the ID of the receiver, for example, can be used to indicate a The ID of the group can also be used to indicate the ID of a type of service. Of course, for the transmission form of the broadcast, the destination ID field can also be ignored.
  • the special MAC sub-headers field is used to indicate the payload. Each contained in the (payload) field Part of the data, the payload field contains data, and the V2V information is contained in the payload field.
  • the vehicle adopts a random competition mechanism of random transmission.
  • This mechanism will exist when multiple neighboring vehicles select the same time-frequency resource for their V2V information.
  • the V2V information transmitted by the vehicle 2 and the vehicle 3 cannot be successfully demodulated, resulting in a problem of low transmission efficiency.
  • the above problem can be solved well by using the data transmission method provided by the present invention.
  • the terminal device in the present invention may be a device such as a UE or a vehicle.
  • the embodiment of the present invention does not specifically limit the terminal device.
  • the first terminal device may include: a sending unit 11, a receiving unit 12, and a determining unit 13.
  • the sending unit 11 is configured to send, by using the first resource block, a first media access control MAC protocol data unit PDU, where the first MAC PDU carries a first reserved indication field, where the first terminal device is used to indicate that the first terminal device The first resource block is reserved.
  • the receiving unit 12 is configured to receive a second MAC PDU that is sent by the second terminal device set by using the second resource block, where the second terminal device set includes at least one second terminal device, where the second MAC PDU carries the first
  • a resource feedback field is configured to indicate that the first resource block is successfully reserved.
  • the determining unit 13 is configured to determine, according to the first resource feedback domain sent by the second terminal device in the second terminal device set received by the receiving unit 12, that the sending unit 11 sends the
  • the first resource block adopted by the first MAC PDU is a resource block used for transmitting a new MAC PDU.
  • the sending unit 11 is further configured to send the new MAC PDU by using the first resource block determined by the determining unit 13.
  • the second MAC PDU received by the receiving unit 12 further includes a second reserved indication field, where the second terminal device indicates that the second terminal device uses the second resource block. Make a reservation.
  • the first resource feedback field carried in the second MAC PDU received by the receiving unit 12 is used to indicate that the first resource block is not successfully reserved.
  • the determining unit 13 is further configured to: according to the first resource feedback domain and the second terminal device set sent by the second terminal device of the second terminal device set received by the receiving unit 12
  • the second reservation indication field sent by all the second terminal devices determines that the new resource block is a resource block used for sending the new MAC PDU from the contention resource pool.
  • the sending unit 11 is further configured to send the new MAC PDU by using the new resource block determined by the determining unit 13.
  • the first terminal device may further include: an acquiring unit 14 and a starting unit 15 .
  • the obtaining unit 14 is configured to acquire configuration information, where the configuration information includes: reservation indication information, before the sending unit 11 sends the first medium access control MAC protocol data unit PDU by using the first resource block.
  • the determining unit 13 is further configured to determine a timing time of the timer according to the reservation indication information acquired by the acquiring unit 14; the timing time is that the first terminal device performs the first resource block The length of time reserved.
  • the initiating unit 15 is configured to start the timer when the sending unit 11 sends the first MAC PDU by using the first resource block.
  • the determining unit 13 is specifically configured to: when the timer started by the starting unit 15 is not stopped, according to one of the second terminal devices in the second terminal device set received by the receiving unit 12
  • the first resource feedback field sent by the device determines that the first resource block used by the sending unit 11 to send the first MAC PDU is a resource block used for sending the new MAC PDU.
  • the determining unit 13 is specifically configured to be used when When the timer started by the starting unit 15 stops counting, according to the first resource feedback field and the second resource device sent by the second terminal device in the second terminal device set received by the receiving unit 12
  • the second reservation indication field sent by all the second terminal devices in the second terminal device set determines, from the contention resource pool, that the new resource block is a resource block used for sending the new MAC PDU.
  • the first terminal device may further include: an acquiring unit 14 and a starting unit 15 .
  • the obtaining unit 14 is configured to acquire configuration information, where the configuration information includes: reservation indication information, before the sending unit 11 sends the first medium access control MAC protocol data unit PDU by using the first resource block.
  • the determining unit 13 is further configured to determine a timing time of the timer according to the reservation indication information acquired by the acquiring unit 14; the timing time is that the first terminal device performs the first resource block The length of time reserved.
  • the initiating unit 15 is configured to start the timer when the sending unit 11 sends the first MAC PDU by using the first resource block.
  • the determining unit 13 is specifically configured to: when the timer started by the starting unit 15 stops counting, or when the timer started by the starting unit 15 does not stop timing, according to the receiving unit 12
  • the reservation indication information acquired by the acquiring unit 14 includes indication information of a reserved duration, which is used to indicate a duration or duration range that can be reserved.
  • the determining unit 13 is specifically configured to: when the indication information of the reserved duration obtained by the acquiring unit 14 is used to indicate a reservable duration, according to the reserved duration acquired by the acquiring unit 14
  • the indication information determines that the reservable duration is the timing time of the timer; or, when the acquisition unit 14 acquires the reservation
  • the long indication information is used to indicate the range of the reservable duration
  • the length of the reservable duration is determined according to the indication information of the reserved duration obtained by the acquiring unit 14 as the timing. The timing of the device.
  • the first terminal device may further include: an acquiring unit 14.
  • the obtaining unit 14 is configured to acquire configuration information, where the configuration information includes: reservation indication information, before the sending unit 11 sends the first medium access control MAC protocol data unit PDU by using the first resource block.
  • the determining unit 13 is further configured to determine, according to the reservation indication information acquired by the acquiring unit 14, a reserved duration; the reserved duration is that the first terminal device pre-predicts the first resource block. The length of time to stay.
  • the first reservation indication field carried in the first MAC PDU sent by the sending unit 11 is further used to indicate a time parameter, where the time parameter is greater than or equal to 0, and the time parameter is used to indicate the reserved duration .
  • the determining unit 13 is specifically configured to: when the time parameter is not 0, the first sending by the second terminal device in the second terminal device set received by the receiving unit 12
  • the resource feedback field determines that the first resource block used by the sending unit 11 to send the first MAC PDU is a resource block used for sending the new MAC PDU.
  • the determining unit 13 is specifically configured to: when the time parameter is 0, according to one of the second terminal device sets received by the receiving unit 12 Determining a new resource block from the contention pool by using the first resource feedback field sent by the second terminal device and the second reservation indication field sent by all the second terminal devices in the second terminal device set A resource block used to send the new MAC PDU.
  • the first terminal device may further include: an acquiring unit 14.
  • the obtaining unit 14 is configured to acquire configuration information before the sending unit 11 sends the first medium access control MAC protocol data unit PDU by using the first resource block.
  • the configuration information includes: reservation indication information.
  • the determining unit 13 is further configured to determine, according to the reservation indication information acquired by the acquiring unit 14, a reserved duration; the reserved duration is that the first terminal device pre-predicts the first resource block. The length of time to stay.
  • the first reservation indication field carried in the first MAC PDU sent by the sending unit 11 is further used to indicate a time parameter, where the time parameter is greater than or equal to 0, and the time parameter is used to indicate the reserved duration .
  • the determining unit 13 is specifically configured to: when the time parameter is 0, or the time parameter is not 0, according to one of the second terminal device sets received by the receiving unit 12 Determining, by the first resource feedback domain sent by the terminal device, the second reservation indication domain sent by all the second terminal devices in the second terminal device set, determining the new from the contention pool
  • the resource block is a resource block used for transmitting the new MAC PDU.
  • the first terminal device may further include: a configuration unit 16.
  • the configuration unit 16 is configured to configure the first pre-predetermined according to the reserved duration determined by the determining unit 13 before the sending unit 11 sends the first medium access control MAC protocol data unit PDU by using the first resource block. Leave the indication field.
  • the reservation indication information acquired by the acquiring unit 14 includes indication information of a reserved duration, which is used to indicate a duration or duration range that can be reserved, or the acquiring unit
  • the obtained reservation indication information includes the indication information of the reserved duration and the length information of the bearer reserved indication field.
  • the determining unit 13 is specifically configured to: when the reservation indication information acquired by the acquiring unit 14 includes indication information of a reserved duration, and the indication information of the reserved duration is used to indicate a duration that can be reserved. And determining, according to the indication information of the reserved duration, that the reservable duration is the reserved duration; if the reservation indication information acquired by the acquiring unit 14 includes Determining the reservable information according to the indication information of the reserved duration obtained by the obtaining unit 14 when the indication information of the reserved duration is used to indicate the range of the reservable duration Any one of the durations in the range of the length of the duration is the reserved duration; if the reservation indication information acquired by the acquiring unit 14 includes the indication information of the reserved duration and the length information of the reserved reservation indication field, according to the The indication information of the reserved duration obtained by the obtaining unit 14 and the length information of the carrying reservation indication field determine the reserved duration.
  • the first terminal device may further include: a monitoring unit 17.
  • the monitoring unit 17 is configured to listen to the contention pool before the sending unit 11 sends the first medium access control MAC protocol data unit PDU through the first resource block.
  • the determining unit 13 is further configured to determine a second resource feedback domain according to the reservation condition of the resource block in the contention pool that is monitored by the intercepting unit 17; the second resource feedback field is used to indicate that the resource is sent The reservation of the resource block in the contention pool in the preceding MAC PDU.
  • the second resource feedback field is also carried in the first MAC PDU sent by the sending unit 11 by using the first resource block.
  • the configuration information acquired by the acquiring unit 14 further includes: resource feedback information.
  • the determining unit 13 is configured to generate the second according to the resource feedback information acquired by the acquiring unit 14 and the reservation condition of the resource block in the contention pool that the intercepting unit 17 listens to. Resource feedback domain.
  • the resource feedback information acquired by the acquiring unit 14 includes: condition information carrying a resource feedback domain and/or length information of a resource feedback domain.
  • the determining unit 13 is configured to: when the resource feedback information acquired by the acquiring unit 14 includes the condition information of the resource feedback domain, determine that the carrying resource acquired by the acquiring unit 14 is satisfied. When the condition information of the domain is fed back, the second resource feedback domain is generated according to the preset length information of the resource feedback domain and the reservation of the resource block in the contention pool that the interception unit 17 listens to; The resource feedback information acquired by the acquiring unit 14 when the resource feedback information acquired by the acquiring unit 14 includes the length information of the resource feedback domain The second resource feedback field is generated by the obtaining unit 14 when the information includes the length information of the resource-receiving domain and the reservation of the resource block in the contention pool.
  • the resource feedback information includes the condition information of the carrying resource feedback domain and the length information of the carrying resource feedback domain
  • the condition information of the carrying resource feedback domain acquired by the acquiring unit 14 when determining the condition information of the carrying resource feedback domain acquired by the acquiring unit 14, The length information of the resource feedback field included in the resource feedback information acquired by the acquiring unit 14 and the reservation condition of the resource block in the contention pool that the intercepting unit 17 listens to generate the second resource Feedback field.
  • the acquiring unit 14 is specifically configured to acquire the configuration information that is configured in advance, or receive the configuration information that is sent by the network device.
  • the first reserved indication field is included in the MAC header of the first MAC PDU sent by the sending unit 11; the MAC header further includes an extended indication field, Instructing whether the first MAC PDU carries the second resource feedback domain, and when the extension indication field indicates that the first MAC PDU carries the second resource feedback domain, the second resource feedback domain includes In the MAC header of the first MAC PDU sent by the sending unit 11.
  • the first reserved indication field is included in the sending unit 11 Transmitting a payload of the first MAC PDU in the payload field, and the MAC header of the first MAC PDU sent by the sending unit 11 includes a MAC sub-header for indicating that the data corresponding to the MAC sub-header is The first reservation indication field; or, when the first MAC PDU sent by the sending unit 11 carries the first reservation indication domain and the second resource feedback domain, the first reservation The indication field and the second resource feedback field are included in a payload field of the first MAC PDU sent by the sending unit 11, and the MAC header of the first MAC PDU sent by the sending unit 11 includes a MAC And a subheader, configured to indicate that the data corresponding to the MAC subheader is the first reserved indication domain and the second resource feedback domain.
  • the acquiring unit 14 obtains the The configuration information further includes: information about the contention pool.
  • the first terminal device may further include: a selecting unit 18, configured to: after the acquiring unit 14 acquires configuration information, according to the information of the contention pool obtained by the acquiring unit 14, from the contention resource pool A resource block is selected as the first resource block.
  • a selecting unit 18 configured to: after the acquiring unit 14 acquires configuration information, according to the information of the contention pool obtained by the acquiring unit 14, from the contention resource pool A resource block is selected as the first resource block.
  • the first terminal device provided by the embodiment of the present invention sends, by using the first resource block, a first MAC PDU carrying a first reserved indication field for indicating that the first resource block is reserved, and then receiving the second terminal. And transmitting, by the second resource block, the second MAC PDU sent by the second resource block, after the second resource block is configured to indicate that the first resource block is successfully reserved by the first resource feedback field, according to a second terminal device in the second terminal device set.
  • the first resource feedback field carried by the second MAC PDU determines that the first resource block is a resource block used for transmitting a new MAC PDU, and sends a new MAC PDU by using the first resource block.
  • the first terminal device indicates that the first resource block is reserved by using the first reserved indication field, and determines that the first resource block is successfully reserved according to the resource feedback field carried in the received MAC PDU sent by the other terminal device. That is, when there is no resource collision, the first resource block is continuously used for the transmission of the new MAC PDU, and the first resource block is determined to be unsuccessful according to the resource feedback field carried in the received MAC PDU sent by the other terminal device. Reserved, that is, when there is a resource collision, the new resource block is reselected for transmission of a new MAC PDU, which effectively reduces the collision rate of the transmission resource and improves the transmission efficiency.
  • the first resource block is reserved by the first terminal device, which is determined by the reservation indication information in the configuration information, and the first resource block is reserved, so that one terminal device keeps using a resource block all the time. The situation realizes the fairness of network resource allocation.
  • Another embodiment of the present invention provides a network device, as shown in FIG. 7, including: a sending unit 21.
  • the sending unit 21 is configured to send configuration information to the first terminal device, where the configuration information includes reservation indication information.
  • the indication information includes: the indication information of the reserved duration, which is used to indicate the length of the reservable duration or the duration; or the indication indication information sent by the sending unit 21 includes: the indication information of the reserved duration and Carry the length information of the reserved indication field.
  • the configuration information that is sent by the sending unit 21 further includes: resource feedback information, where the resource feedback information includes: condition information carrying a resource feedback domain and/or carrying a resource feedback domain. Length information.
  • the sending unit 21 is specifically configured to send the configuration information to the first terminal device by using system information or radio resource control RRC signaling.
  • the configuration information sent by the sending unit 21 further includes: information of a contention pool.
  • the network device provided by the embodiment of the present invention, by sending configuration information including the reservation indication information to the first terminal device, enables the first terminal device to reserve the first resource block according to the determination by the reservation indication information.
  • the length of time is reserved for the first resource block, which avoids the situation that a terminal device always uses a certain resource block, and realizes the fairness of network resource allocation.
  • Another embodiment of the present invention provides a data transmission method. As shown in FIG. 8, the method may include:
  • the first terminal device sends the first MAC PDU by using the first resource block.
  • the first MAC PDU carries a first reserved indication field, and is used to instruct the first terminal device to reserve the first resource block.
  • a resource block may be randomly selected from all resource blocks included in the contention resource pool as the first resource block, and then the first resource block is used to indicate that The first reserved indication field that is reserved by the first resource block is carried in the first MAC PDU to broadcast to surrounding terminal devices.
  • the first terminal device receives a second MAC PDU that is sent by the second terminal device set by using the second resource block.
  • the second terminal device set includes at least one second terminal device, and second The MAC PDU carries a first resource feedback field, which is used to indicate that the first resource block is successfully reserved.
  • the first resource feedback field may also be used to indicate whether other resource blocks except the first resource block in the contention resource pool are successfully reserved.
  • the first terminal device determines, according to the first resource feedback field sent by the second terminal device in the second terminal device set, that the first resource block is a resource block used for sending a new MAC PDU.
  • the first terminal device sends a new MAC PDU by using the first resource block.
  • the first terminal device may be configured according to the second MAC PDU sent by the second terminal device in the received second terminal device set.
  • the first resource feedback field carried in the first resource block is determined to be the resource block used for sending the new MAC PDU, that is, the first terminal device may determine the first according to the first resource feedback field carried in the received second MAC PDU. Whether the resource block is successfully reserved, and when successfully reserved, continues to use the first resource block for subsequent data transmission.
  • the first terminal device sends, by using the first resource block, a first MAC PDU carrying a first reserved indication field for indicating that the first resource block is reserved, and then receiving the first MAC PDU.
  • the second terminal device After the second set of terminal devices is sent by the second resource block, and the second MAC PDU is used to indicate that the first resource block is successfully reserved, the second terminal device is configured according to the second terminal device in the second terminal device set.
  • the first resource feedback field carried by the sent second MAC PDU determines that the first resource block is a resource block used for transmitting a new MAC PDU, and sends a new MAC PDU through the first resource block.
  • the first terminal device indicates that the first resource block is reserved by using the first reserved indication field, and determines that the first resource block is successfully reserved according to the resource feedback field carried in the received MAC PDU sent by the other terminal device. That is, when there is no resource collision, the first resource block is continuously used for the transmission of the new MAC PDU, which effectively reduces the collision rate of the transmission resource and improves the transmission efficiency.
  • the second MAC PDU that is sent by the second terminal device that is received in step 302 further carries a second reservation indication field, which is used to instruct the second terminal device to reserve the second resource block.
  • the transmission method may further include: a second reservation indication sent by the first terminal device according to the first resource feedback domain sent by one second terminal device in the second terminal device set and all the second terminal devices in the second terminal device set The domain determines from the contention resource pool that the new resource block is a resource block used for transmitting a new MAC PDU, and sends a new MAC PDU through the new resource block.
  • the data transmission method may further include: acquiring, by the first terminal device, configuration information, where the configuration information includes: reservation indication information.
  • the timing time is a length of time for the first terminal device to reserve the first resource block, and sending, by the first terminal device, the first MAC address by using the first resource block At the time of the PDU, the first terminal device starts the timer.
  • the step 303 may be: when the timer is not stopped, the first terminal device determines, according to the first resource feedback field sent by the second terminal device in the second terminal device set, that the first resource block is sent.
  • the resource block used by the MAC PDU may be: when the timer is not stopped, the first terminal device determines, according to the first resource feedback field sent by the second terminal device in the second terminal device set, that the first resource block is sent. The resource block used by the MAC PDU.
  • the data transmission method may further include: when the timer stops counting, the first terminal device sends the first resource feedback field according to a second terminal device in the second terminal device set.
  • the second reservation indicator field sent by the second terminal device determines that the new resource block is a resource block used for sending a new MAC PDU, and may include: when the timer stops counting, or the timer is not When the timing is stopped, the first terminal device sends a second reserved indication field sent by a second terminal device in the second terminal device set and a second reserved indication field sent by all the second terminal devices in the second terminal device set.
  • a new resource block is determined from the pool of competing resources as a resource block used to transmit a new MAC PDU.
  • the data transmission method may further include: the first terminal device configuring the first reservation indication field as a preset value.
  • the reservation indication information in the configuration information acquired by the first terminal device includes indication information of the reserved duration, and is used to indicate a duration or duration range that can be reserved.
  • the first terminal device determines the timing of the timer according to the reservation indication information, which may include: when the indication information of the reserved duration is used to indicate the reservable duration, the first terminal device according to the reserved duration
  • the indication information determines that the reservable time is the timer time of the timer; or when the indication information of the reserved duration is used to indicate the reservable duration range, the first terminal device determines that the reservable is available according to the indication information of the reserved duration Any one of the durations is the timer's timing.
  • the data transmission method may further include: acquiring, by the first terminal device, configuration information, where the configuration information includes: reservation indication information.
  • the first terminal device determines the reserved duration according to the reservation indication information, where the reserved duration is the length of time that the first terminal device reserves the first resource block.
  • the first reservation indication field is further used to indicate a time parameter, the time parameter is greater than or equal to 0, and the time parameter is used to indicate a reserved duration. This time parameter gradually decreases with time.
  • the step 303 may be specifically: when the time parameter is not 0, the first terminal device determines, according to the first resource feedback field sent by the second terminal device in the second terminal device set, that the first resource block is a new one.
  • the resource block used by the MAC PDU used by the MAC PDU.
  • the first terminal device is configured according to the second terminal. a first resource feedback field sent by a second terminal device in the standby set and a second reserved indication field sent by all second terminal devices in the second terminal device set, and determining a new resource block from the contention resource pool as a sending The resource block used by the new MAC PDU.
  • the first terminal device sends a second reservation indication sent by the first resource feedback domain sent by one second terminal device in the second terminal device set and all second terminal devices in the second terminal device set.
  • the domain, the new resource block is determined to be a resource block used for sending a new MAC PDU, and may include: when the time parameter is 0, or the time parameter is not 0, the first terminal device is configured according to the second terminal. a first resource feedback domain sent by one second terminal device in the device set and a second reserved indication domain sent by all second terminal devices in the second terminal device set, and determining a new resource block from the contention resource pool as a sending The resource block used by the new MAC PDU.
  • the reserved indication field carried in the MAC PDU sent by the first terminal device is also decremented with time.
  • the data transmission method may further include: configuring, by the first terminal device, the first reservation indication field according to the reserved duration.
  • the reservation indication information includes the indication information of the reserved duration, and is used to indicate the duration or duration range that can be reserved, or the reservation indication information includes the indication information of the reserved duration and the length information of the reserved reservation indication domain.
  • the first terminal device determines the reserved duration according to the reservation indication information, and specifically includes:
  • the first terminal device determines, according to the indication information of the reserved duration, that the reservable duration is the The length of time reserved. or,
  • the first terminal device determines, according to the indication information of the reserved duration, the length of time that can be reserved. Any one of the durations is reserved. or,
  • the first terminal device If the indication information includes the indication information of the reserved duration and the length information of the reserved indication indication field, the first terminal device according to the indication information of the reserved duration and the carrying reservation indication The length information of the domain determines the length of the reservation.
  • the resource transmission method in the embodiment of the present invention may further include: the first terminal device listening to the competition resource pool, in order to facilitate the determining, by the terminal device, the first terminal device And determining, according to the reserved condition of the resource block in the contending contention resource pool, the second resource feedback field is used to indicate the reservation of the resource block in the contention resource pool before sending the first MAC PDU.
  • the second resource feedback field is also carried in the first MAC PDU sent by the first terminal device by using the first resource block.
  • the configuration information acquired by the first terminal device may further include: resource feedback information, where the determining the second resource feedback domain according to the reserved condition of the resource block in the monitored contention pool, the specific The method may include: the first terminal device generates a second resource feedback domain according to the resource feedback information and the reserved condition of the resource block in the monitored contention pool.
  • the resource feedback information includes: condition information carrying the resource feedback domain and/or length information of the resource feedback domain.
  • the first terminal device generates a second resource feedback domain according to the resource feedback information and the reserved condition of the resource block in the contending contention resource pool, which may include:
  • the resource feedback information includes the condition information of the resource feedback domain
  • the first terminal device determines that the condition information of the resource feedback domain is satisfied, according to the preset length information of the resource feedback domain and the monitored content pool
  • the reservation of the resource block generates a second resource feedback domain.
  • the first terminal device When the resource feedback information includes the length information of the resource feedback domain, the first terminal device generates the second resource according to the length information of the resource feedback domain included in the resource feedback information and the reserved condition of the resource block in the monitored contention pool. Feedback field. or,
  • the resource feedback information includes the condition information of the resource feedback domain and the length information of the resource feedback domain
  • the first terminal device determines the condition information that satisfies the resource feedback domain
  • the length of the resource feedback domain included in the resource feedback information is included.
  • Information and The reservation of the resource block in the monitored contention pool generates a second resource feedback field.
  • the first terminal device obtains pre-configured configuration information, and in another possible implementation manner, The first terminal device may receive configuration information sent by the network device.
  • the specific implementation manner in which the first terminal device receives the configuration information sent by the network device may be: the first terminal device receives the network device by using system information or radio resource control (English: Radio Resource Control, RRC for short). Configuration information.
  • the RRC signaling may be: RRC Connection Reconfiguration.
  • the configuration information acquired by the first terminal device may further include: information that competes for the resource pool.
  • the data transmission method may further include: the first terminal device selects a resource block as the first resource block from the contention resource pool according to the information of the contention resource pool.
  • the first reservation indication The domain is included in the MAC header of the first MAC PDU; the MAC header further includes an extension indication field, configured to indicate whether the first MAC PDU carries the second resource feedback domain, and when the extension indication field indicates that the first MAC PDU carries the second resource When the domain is fed back, the second resource feedback field is included in the MAC header of the first MAC PDU.
  • the first MAC PDU to carry the first reserved indication field, or the specific form of the first reserved indication domain and the second resource feedback domain
  • the first reserved indication field is included in the payload field of the first MAC PDU
  • the MAC header of the first MAC PDU includes a MAC sub-header for indicating that the data corresponding to the MAC sub-header is a first reservation indication field
  • the first MAC header of the first MAC PDU includes a MAC sub-header for indicating that the data corresponding to the MAC sub-header is the first reserved indication field and the second resource feedback field.
  • the data transmission method may include:
  • the network device sends configuration information to the first terminal device.
  • the configuration information includes reservation indication information.
  • the network device sends the configuration information including the reservation indication information to the first terminal device, so that the first terminal device can perform the first resource block according to the determination by the reservation indication information.
  • the reserved time length is reserved for the first resource block, which avoids the situation that a terminal device always uses a certain resource block, and realizes the fairness of network resource allocation.
  • the reservation indication information includes: indication information of a reserved duration, which is used to indicate a duration or a duration range that can be reserved; or the reservation indication information includes: indication information of the reserved duration and Carry the length information of the reserved indication field.
  • the configuration information may further include: resource feedback information, where the resource feedback information may include: condition information carrying a resource feedback domain and/or length information of a resource feedback domain.
  • step 401 may be specifically: the network device sends the configuration information to the first terminal device by using system information or RRC signaling.
  • Another embodiment of the present invention provides a data transmission method, which is used to set a reservation duration of a first resource block by a first terminal device by using a timer. As shown in FIG. 10, the method may include:
  • the first terminal device acquires configuration information.
  • the configuration information may include: information about the contention of the resource pool, and further, in order to limit the length of time for the first terminal device to reserve the first resource block, the configuration information may further include reservation indication information, where the reservation indication information may include The indication information of the duration is used to indicate the duration or duration range that can be reserved, and further, in order to enable other terminal devices to confirm whether their resources are successfully reserved, the configuration information may also be
  • the resource feedback information may include the condition information of the resource feedback domain and/or the length information of the resource feedback domain. When the resource feedback information includes the condition information of the resource feedback domain, the length of the portable resource feedback domain may be It is pre-configured in the first terminal device, or can be set by the first terminal device according to the requirements of the actual application scenario.
  • the configuration information may be pre-configured in the first terminal device, or may be obtained by the first terminal device from the network device, that is, the first terminal device may be in any of the following manners. Get configuration information:
  • Manner 1 The first terminal device acquires pre-configured configuration information.
  • Manner 2 The first terminal device receives configuration information sent by the network device.
  • the network device may send the configuration information to the first terminal device by using system information or RRC signaling.
  • the first terminal device may receive the configuration information sent by the network device by using system information or RRC signaling.
  • steps 502-505 may be performed:
  • the first terminal device selects a resource block as the first resource block from the contention resource pool according to the information of the contention resource pool.
  • the first terminal device can arbitrarily select a resource block from the contention pool according to the contention pool information included in the configuration information. As the first resource block.
  • the content of the contention pool may include the information of the SA resource pool and the information of the data resource pool, where the contention pool may include the SA resource pool and the data resource pool.
  • the contention resource pool information may include information of a data resource pool, and the contention resource pool may include a data resource pool.
  • the first terminal device may select an SA resource block from the SA resource pool according to the information of the SA resource pool and the information of the data resource pool, and select a SA resource block from the data resource pool. Any one of the data resource blocks is selected, that is, in this scenario, the first resource in the embodiment of the present invention
  • the source block includes an SA resource block and a data resource block.
  • the first terminal device may select a data resource block from the data resource pool according to the information of the data resource pool, that is, in this scenario, in the embodiment of the present invention.
  • the first resource block is a data resource block.
  • the first terminal device determines a timing time of the timer according to the reservation indication information.
  • the timing of the timer is the length of time that the first terminal device reserves the first resource block. After the first terminal device obtains the configuration information, the timer may be determined according to the reservation indication information included in the configuration information, as the time when the first terminal device can reserve the first resource block.
  • the determining, by the first terminal device, the timing time of the timer according to the reservation indication information may be specifically:
  • the first terminal device may determine, according to the indication information of the reserved duration, that the reservable duration is the timer timing.
  • the first terminal device may determine, according to the indication information of the reserved duration, any one of the durations of the reservable duration as the timer. time.
  • the first terminal device configures the first reserved indication field as a preset value.
  • the first reserved indication field may be configured as a preset value to indicate that it is desired to reserve the resource block for current data transmission, that is, It is desirable to reserve the first resource block.
  • the length of the first reserved indication field is 1 bit
  • "1" may be set to a preset value, that is, when the first terminal device needs to reserve the first resource block
  • the first reservation indication field may be configured to "1" to indicate that it is desirable to reserve the first resource block.
  • the first reserved indication field may be configured as “0”.
  • the first terminal device monitors the contention resource pool, and generates a second resource feedback domain according to the resource feedback information and the reserved condition of the resource block in the monitored contention pool.
  • the first terminal device can be confirmed in order to be able to assist other surrounding terminal devices. Whether the reserved resource block is successfully reserved, after the configuration information received by the first terminal device, the contention pool can be monitored, and the resource feedback information included in the configuration information and the contrite resource pool are monitored. A reservation of the resource block, generating a second resource feedback field for indicating a reservation condition of the resource block in the contention resource pool before transmitting the first MAC PDU.
  • the first terminal device If the first terminal device successfully receives data on a resource block in the contention resource pool before transmitting the first MAC PDU, the first terminal device considers that the resource block is successfully reserved, if the first terminal device Before the first MAC PDU is sent, the data is not successfully received on a resource block in the contention resource pool (where the data is not successfully received may refer to the data not received on the resource block, and may also refer to the resource If the data is received on the block but is not successfully decoded, the first terminal device considers that the resource block is not successfully reserved.
  • the resource feedback information may include: condition information carrying the resource feedback domain and/or length information of the resource feedback domain.
  • the first terminal device generates a second resource feedback domain according to the resource feedback information and the reserved condition of the resource block in the contending competition resource pool, which may be:
  • the resource feedback information includes the condition information of the resource feedback domain
  • the first terminal device determines that the condition information of the resource feedback domain is satisfied, according to the preset length information of the resource feedback domain and the monitored content pool
  • the reservation of the resource block generates a second resource feedback domain.
  • the first terminal device when the resource feedback information includes the length information of the resource feedback domain, the first terminal device generates, according to the length information of the resource feedback domain included in the resource feedback information and the reserved condition of the resource block in the monitored contention pool. Two resource feedback fields.
  • the resource feedback information includes the condition information of the resource feedback domain and the length information of the resource feedback domain
  • the resource feedback domain included in the resource feedback information The length information and the reserved condition of the resource block in the monitored contention pool generate a second resource feedback field.
  • the condition information of the carrying resource feedback domain may be a probability value, and the first terminal device may determine, according to the probability value, whether the conditional information carrying the resource feedback domain is met. interest.
  • the second resource feedback field may be in the form of a bit table, each bit represents a resource block in the contention resource pool, and may indicate that the resource block is not successfully reserved by using “0”. 1" indicates that the resource block was successfully reserved.
  • the resource feedback information includes the length information of the resource feedback domain, and the length information of the bearer resource feedback domain is 3 bits. Then, before the first MAC PDU is sent, the first terminal device can monitor the contention of the contention pool. Determining a reservation condition of the first three resource blocks (or the last three resource blocks) of the first resource block, and generating a second resource feedback field according to the reservation condition of the corresponding resource block and the length information of the resource feedback domain.
  • the first terminal device Before the first MAC PDU is sent, the first terminal device does not successfully receive data on the first resource block in the first three resource blocks of the first resource block, and successfully receives data on the second resource block. The data is not successfully received on the third resource block. At this time, the first terminal device may determine that the first resource block in the first three resource blocks of the first resource block is not successfully reserved, and the second resource block is not successfully reserved. If the third resource block is successfully reserved, the first resource device generates a second resource feedback field according to the reservation of the corresponding resource block and the length information of the resource feedback domain. 010.
  • the first terminal device sends the first MAC PDU by using the first resource block, and starts a timer.
  • the first terminal device After the first terminal indication device is configured with the first reserved indication field, the second resource feedback domain is generated, and the timer is determined, the first terminal device can send the first pre-report through the first resource block.
  • the first MAC PDU indicating the domain, the second resource feedback field, and the data to be transmitted is left, and when the first MAC PDU is sent, a timer is started, so that the timer starts timing.
  • the first resource block includes the SA resource block and the data resource block
  • the first terminal device sends the first MAC PDU by using the first resource block, specifically: the first terminal The device first broadcasts the SA information by using the SA resource block, where the SA information is used to indicate a time-frequency resource location and a modulation and coding mode of the data resource block in the data resource pool, and then, through the data resource block, Modulation coding method according to the SA information Broadcast the first MAC PDU and start the timer.
  • the first resource block is a data resource block
  • the first terminal device sends the first MAC PDU by using the first resource block, specifically: by using the data resource block. Broadcast the first MAC PDU and start the timer.
  • the first reserved indicator field is carried in the first MAC PDU, or the specific form of the first reserved indicator field and the second resource feedback field is carried in the first possible implementation manner.
  • the MAC header further includes an extension indication field, configured to indicate whether the first MAC PDU carries the second resource feedback domain, and when the extension indication field indicates that the first MAC PDU carries the second resource feedback In the domain, the second resource feedback field is included in the MAC header of the first MAC PDU, and the specific format of the first MAC PDU may be as shown in FIG. 11 and FIG.
  • the first reserved indication field is included in a payload domain of the first MAC PDU, and the MAC header of the first MAC PDU is in the MAC header.
  • the MAC sub-header is configured to indicate that the data corresponding to the MAC sub-header is the first reserved indication field, and the specific format of the first MAC PDU may be as shown in FIG.
  • the first MAC PDU carries the first reserved indication field, And the second resource feedback field, the first reserved indication field and the second resource feedback field are included in a payload field of the first MAC PDU, and the MAC header of the first MAC PDU includes a MAC sub-header for indicating the MAC sub-
  • the data corresponding to the header is the first reserved indication field and the second resource feedback field, and the specific format of the first MAC PDU may be as shown in FIG. 14.
  • the length of each domain shown in FIG. 11-14 is only a schematic, that is, the type of the domain included in the first MAC PDU, and each domain in the embodiment of the present invention.
  • the length of the domain included in the first MAC PDU and the length of each domain can be set according to the requirements of the actual application scenario.
  • the first terminal device receives the second set of terminal devices and sends the second set of terminal devices. Second MAC PDU.
  • the second set of terminal devices includes at least one second terminal device, where the second MAC PDU carries the second reserved indication field and the first resource feedback field, and the second reserved indication field is used to indicate that the second terminal device The second resource block is reserved, and the first resource feedback field is used to indicate whether the first resource block is successfully reserved.
  • the first terminal device After the first terminal device sends the first MAC PDU carrying the first reserved indication domain, the second resource feedback domain, and the data to be sent by using the first resource block, if the first terminal device receives the second terminal device set, And transmitting, by the second resource block, the second MAC PDU carrying the second reserved indication domain and the first resource feedback domain, when the first terminal device has a new MAC PDU to be sent, the first terminal device may receive the received
  • the timing of the second reserved indication field, the first resource feedback field, and the timer that is carried in the second MAC PDU determines the resource block used for sending the new MAC PDU, and may specifically include the following steps 508-510.
  • the first terminal device determines, according to the first resource feedback field sent by the second terminal device in the second terminal device set, whether the first resource block is successfully reserved, and determines whether the timer stops counting.
  • the first terminal device may receive the second terminal according to the received second terminal.
  • the first resource feedback field carried in the second MAC PDU sent by the second terminal device in the device set determines whether the first resource block is successfully reserved, and determines whether the timer stops counting.
  • the first resource block is successfully reserved, that is, the SA resource block and the data resource block are successfully reserved, and the first resource block is not successfully reserved. It means that the SA resource block and/or the data resource block are not successfully reserved.
  • the first resource block is successfully reserved, meaning that the data resource block is successfully reserved, and the first resource block is not successfully reserved, meaning that the data resource block is not successfully succeeded. Reserved.
  • the first terminal device determines that the first resource block is a resource block used for sending a new MAC PDU, and A new MAC PDU is transmitted through the first resource block.
  • the reserved indication field carried in the new MAC PDU is a preset value, and is used to indicate that it is desired to continue to reserve the first resource block.
  • the device does not stop timing, and the first terminal device determines, according to the second reserved indication field sent by all the second terminal devices in the second terminal device set, the new resource block from the contention resource pool as the resource used for sending the new MAC PDU. Block and send a new MAC PDU through the new resource block.
  • the first terminal device sends, by using the first resource block, a first MAC PDU carrying a first reserved indication field for indicating that the first resource block is reserved, and then receiving the first MAC PDU.
  • the second terminal device After the second set of terminal devices is sent by the second resource block, and the second MAC PDU is used to indicate that the first resource block is successfully reserved, the second terminal device is configured according to the second terminal device in the second terminal device set.
  • the first resource feedback field carried by the sent second MAC PDU determines that the first resource block is a resource block used for transmitting a new MAC PDU, and sends a new MAC PDU through the first resource block.
  • the first terminal device indicates that the first resource block is reserved by using the first reserved indication field, and determines that the first resource block is successfully reserved according to the resource feedback field carried in the received MAC PDU sent by the other terminal device. That is, when there is no resource collision, the first resource block is continuously used for the transmission of the new MAC PDU, and the first resource block is determined to be unsuccessful according to the resource feedback field carried in the received MAC PDU sent by the other terminal device. Reserved, that is, when there is a resource collision, the new resource block is reselected for transmission of a new MAC PDU, which effectively reduces the collision rate of the transmission resource and improves the transmission efficiency.
  • the first resource block is reserved by the first terminal device, which is determined by the reservation indication information in the configuration information, and the first resource block is reserved, so that one terminal device keeps using a resource block all the time. The situation realizes the fairness of network resource allocation.
  • Another embodiment of the present invention provides a data transmission method for setting a time parameter
  • the first terminal device reserves the reserved duration of the first resource block.
  • the method may include:
  • the first terminal device obtains configuration information.
  • the configuration information may include: information of a contention pool; further, in order to limit the length of time for the first terminal device to reserve the first resource block, the configuration information may further include reservation indication information, where the reservation indication information may include The indication information of the duration is used to indicate the duration or duration range that can be reserved, or the reservation indication information includes the indication information of the reserved duration and the length information of the reserved reservation indication field; and further, in order to enable other
  • the terminal device may confirm whether the resource is successfully reserved, and the configuration information may further include resource feedback information, where the resource feedback information may include condition information carrying the resource feedback domain and/or length information of the resource feedback domain, when the resource feedback information When the condition information of the resource feedback domain is included, the length of the bearer resource feedback domain may be pre-configured in the first terminal device, or may be set by the first terminal device according to the requirements of the actual application scenario.
  • steps 602-605 may be performed:
  • the first terminal device selects a resource block as the first resource block from the contention resource pool according to the information of the contention resource pool.
  • the first terminal device determines a reserved duration according to the reservation indication information.
  • the reserved duration is the length of time that the first terminal device reserves the first resource block. After the first terminal device obtains the configuration information, the reservation duration may be determined according to the reservation indication information included in the configuration information, as the time when the first terminal device can reserve the first resource block.
  • the determining, by the first terminal device, the reserved duration according to the reservation indication information may be:
  • the first terminal device determines, according to the indication information of the reserved duration, that the reservable duration is reserved. duration.
  • the first terminal device determines whether any one of the durations that can be reserved is the reserved duration.
  • the first terminal device configures the first reserved indication field according to the reserved duration.
  • the first reserved indication field may be configured according to the determined reservation duration to indicate that it is desired to reserve the resource block for current data transmission.
  • the first resource block is expected to be reserved, and the time parameter is greater than or equal to 0, which is used to indicate the reserved duration, that is, the length of time that the first terminal device can reserve the first resource block.
  • the first terminal device monitors the contention resource pool, and generates a second resource feedback domain according to the resource feedback information and the reserved condition of the resource block in the monitored contention pool.
  • the first terminal device sends the first MAC PDU by using the first resource block.
  • the first terminal device may send the first reserved indication field and the second resource feedback by using the first resource block.
  • the first terminal device receives a second MAC PDU that is sent by the second terminal device set by using the second resource block.
  • the first terminal device After the first terminal device sends the first MAC PDU carrying the first reserved indication domain, the second resource feedback domain, and the data to be sent by using the first resource block, if the first terminal device receives the second terminal device set, The second resource block is sent with a second Reserving the second MAC PDU of the indication domain and the first resource feedback domain, when the first terminal device has a new MAC PDU to be sent, the first terminal device may according to the second pre-received in the received second MAC PDU.
  • the leaving indicator field, the first resource feedback field, and the time parameter that gradually decreases with time determine the resource block used for sending the new MAC PDU, and may specifically include the following steps 608-610.
  • the first terminal device determines, according to the first resource feedback field sent by the second terminal device in the second terminal device set, whether the first resource block is successfully reserved, and determines whether the time parameter is 0.
  • the first terminal device may receive the second terminal according to the received second terminal.
  • the first resource feedback field carried in the second MAC PDU sent by the second terminal device in the device set determines whether the first resource block is successfully reserved, and determines whether the time parameter is 0.
  • the first terminal device determines that the first resource block is a resource block used for sending a new MAC PDU, and sends a new MAC by using the first resource block. PDU.
  • the reservation indication field carried in the new MAC PDU is configured according to the current time parameter, and is used to indicate that it is desired to continue to reserve the first resource block.
  • the first terminal device determines, according to the second reservation indication field sent by all the second terminal devices in the second terminal device set, the new resource block from the contention resource pool as the resource used for sending the new MAC PDU. Block and send a new MAC PDU through the new resource block.
  • the present invention is directed to a vehicle using a terminal device as an example, and the present invention has been specifically implemented. The process is illustrated.
  • the contention pool is divided into seven resource blocks in the time domain, numbered #1, #2, #3, #4, #5, #6, #7, and in an area.
  • both the vehicle 1 and the vehicle 2 select the #2 resource block for data transmission according to the acquired information of the competing resource pool by a randomly selected selection method, and assume that the reserved time determined by the vehicle 1 is 7, And the reserved indication field of the vehicle 1 according to the reserved duration is 7, indicating that the vehicle 1 expects to reserve the #2 resource block for 7 cycles, the reserved time determined by the vehicle 2 is 9, and the vehicle 2 is configured according to the reserved duration.
  • the reserved indication field is 9, indicating that the vehicle 2 desires to reserve the #2 resource block for 9 cycles.
  • the reserved reservation indication field can be carried in the MAC PDU and broadcast to the surrounding vehicles through the #2 resource block.
  • the reservation of the #2 resource block is also set to 0. .
  • the configured reservation finger can be passed through the #4 resource block.
  • the display domain and resource feedback domain are carried in the MAC PDU and broadcast to surrounding vehicles.
  • the vehicle 1 and the vehicle 2 can successfully receive the MAC PDU of the vehicle 3, and determine, according to the received resource feedback field carried in the MAC PDU of the vehicle 3, that the MAC PDU sent by itself is not successfully received by the surrounding vehicle, that is, It is determined that the #2 resource block is not successfully reserved, and at this time, the vehicle 1 and the vehicle 2 can determine a new resource block for transmission from the contention pool according to the reservation indication field carried in the MAC PDU of the vehicle 3, respectively.
  • the new MAC PDU for example, the vehicle 1 determines the new resource block as the #1 resource block according to the reservation indication field carried in the MAC PDU of the vehicle 3.
  • the vehicle that is in the vicinity of the vehicle 3, such as the vehicle 4 receives the MAC PDU of the surrounding vehicle all the time, and determines that only the #4 resource block is successfully reserved, and then the vehicle 4 selects according to the acquired information of the competitive resource pool.
  • the #7 resource block is used for the transmission of data, and it is assumed that no other vehicle competes with the vehicle 4 for resources (so the data it transmits can be successfully received by the vehicle 3), assuming that the reserved time determined by the vehicle 4 is 9, and the vehicle 4, the reserved indication field configured according to the reserved duration is 9, indicating that the vehicle 4 expects to reserve the #7 resource block for 9 cycles, and the vehicle 4 generates the resource feedback field as 100 according to the resource feedback information before transmitting the MAC PDU.
  • the reservations of the three resource blocks #4 resource block, #5 resource block, and #6 resource block in front of the current #7 resource block are respectively indicated, and the #4 resource block is successfully reserved.
  • the configured reservation indication domain and the resource feedback domain may be carried in the MAC PDU and broadcast to the surrounding vehicles through the #7 resource block.
  • the vehicle 3 After the vehicle 3 successfully receives the MAC PDU of the vehicle 4, it determines that the MAC PDU transmitted by itself is successfully received by the surrounding vehicle according to the received resource feedback field carried in the MAC PDU of the vehicle 4, that is, determining #4 The resource block is successfully reserved, so that the vehicle 3 can determine the #4 resource block as the resource block used for transmitting the new MAC PDU until the reservation time expires or the third party determines that the #4 resource block is not successful. Reserved.
  • the first terminal device sends, by using the first resource block, a first MAC PDU carrying a first reserved indication field for indicating that the first resource block is reserved, and then receiving the first MAC PDU.
  • the second terminal device set passes the second resource After the second MAC PDU that is sent by the second terminal device in the second terminal device set is carried by the second MAC PDU that is used to indicate that the first resource block is successfully reserved by the first resource feedback field, A resource feedback field determines that the first resource block is a resource block used for transmitting a new MAC PDU, and sends a new MAC PDU through the first resource block.
  • the first terminal device indicates that the first resource block is reserved by using the first reserved indication field, and determines that the first resource block is successfully reserved according to the resource feedback field carried in the received MAC PDU sent by the other terminal device. That is, when there is no resource collision, the first resource block is continuously used for the transmission of the new MAC PDU, and the first resource block is determined to be unsuccessful according to the resource feedback field carried in the received MAC PDU sent by the other terminal device. Reserved, that is, when there is a resource collision, the new resource block is reselected for transmission of a new MAC PDU, which effectively reduces the collision rate of the transmission resource and improves the transmission efficiency.
  • the first resource block is reserved by the first terminal device, which is determined by the reservation indication information in the configuration information, and the first resource block is reserved, so that one terminal device keeps using a resource block all the time. The situation realizes the fairness of network resource allocation.
  • FIG. 17 Another embodiment of the present invention provides a first terminal device, as shown in FIG. 17, comprising: a transmitter 71, a receiver 72, and a processor 73.
  • the sender 71 is configured to send, by using the first resource block, a first media access control MAC protocol data unit PDU, where the first MAC PDU carries a first reserved indication field, where the first terminal device is used to indicate that the first terminal device The first resource block is reserved.
  • the receiver 72 is configured to receive a second MAC PDU that is sent by the second terminal device set by using the second resource block, where the second terminal device set includes at least one second terminal device, where the second MAC PDU carries the first
  • a resource feedback field is configured to indicate that the first resource block is successfully reserved.
  • the processor 73 is configured to determine, according to the first resource feedback field sent by the second terminal device in the second set of terminal devices received by the receiver 72, that the transmitter 71 sends the
  • the first resource block adopted by the first MAC PDU is a resource block used for transmitting a new MAC PDU.
  • the transmitter 71 is further configured to send the new MAC PDU by using the first resource block determined by the processor 73.
  • the second MAC PDU received by the receiver 72 further carries a second reserved indication field, where the second terminal device is instructing the second terminal device to use the second resource block. Make a reservation.
  • the first resource feedback field carried in the second MAC PDU received by the receiver 72 is used to indicate that the first resource block is not successfully reserved.
  • the processor 73 is further configured to: according to the first resource feedback domain and the second terminal device set sent by one of the second terminal devices in the second terminal device set received by the receiver 72
  • the second reservation indication field sent by all the second terminal devices determines that the new resource block is a resource block used for sending the new MAC PDU from the contention resource pool.
  • the transmitter 71 is further configured to send the new MAC PDU by using the new resource block determined by the processor 73.
  • the processor 73 is further configured to: before the transmitter 71 sends the first media access control MAC protocol data unit PDU by using the first resource block, acquiring configuration information, where The configuration information includes: reservation indication information.
  • the processor 73 is further configured to determine, according to the reservation indication information that is obtained by the processor 73, a timing time of the timer; the timing time is that the first terminal device performs the first resource block. The length of time reserved.
  • the processor 73 is further configured to start the timer when the transmitter 71 sends the first MAC PDU by using the first resource block.
  • the processor 73 is specifically configured to: when the timer started by the processor 73 is not stopped, according to one of the second terminal devices in the second terminal device set received by the receiver 72
  • the first resource feedback field sent by the device determines that the first resource block used by the sender 71 to send the first MAC PDU is a resource block used for sending the new MAC PDU.
  • the processor 73 is specifically used in When the timer started by the processor 73 stops counting, according to the first resource feedback domain and the second terminal device sent by the second terminal device received by the receiver 72 The second reservation indication field sent by all the second terminal devices in the second terminal device set determines that the new resource block is a resource block used for sending the new MAC PDU from the contention resource pool.
  • the processor 73 is further configured to: before the transmitter 71 sends the first media access control MAC protocol data unit PDU by using the first resource block, acquiring configuration information, where The configuration information includes: reservation indication information.
  • the processor 73 is further configured to determine, according to the reservation indication information that is obtained by the processor 73, a timing time of the timer; the timing time is that the first terminal device performs the first resource block. The length of time reserved.
  • the processor 73 is further configured to start the timer when the transmitter 71 sends the first MAC PDU by using the first resource block.
  • the processor 73 is specifically configured to: when the timer started by the processor 73 stops counting, or when the timer started by the processor 73 does not stop timing, according to the receiver 72 receives The first resource feedback domain sent by one of the second terminal devices and the second reservation sent by all the second terminal devices in the second terminal device set And indicating a domain, determining, by the pool of contention resources, the new resource block is a resource block used for sending the new MAC PDU.
  • the reservation indication information that is obtained by the processor 73 includes indication information of a reserved duration, and is used to indicate a duration or duration range that can be reserved.
  • the processor 73 is specifically configured to: when the indication information of the reserved duration obtained by the processor 73 is used to indicate a reservable duration, according to the reserved duration acquired by the processor 73
  • the indication information determines that the reservable duration is the timing time of the timer; or, when the indication information of the reserved duration acquired by the processor 73 is used to indicate a reservable duration range, Determining, according to the indication information of the reserved duration obtained by the processor 73, any one of the reservable duration ranges
  • the length of time is the timer.
  • the processor 73 is further configured to: before the transmitter 71 sends the first media access control MAC protocol data unit PDU by using the first resource block, acquiring configuration information, where The configuration information includes: reservation indication information.
  • the processor 73 is further configured to determine, according to the reservation indication information that is obtained by the processor 73, a reservation duration, where the reserved duration is that the first terminal device performs the first resource block. The length of time to stay.
  • the first reservation indication field carried in the first MAC PDU sent by the sender 71 is further used to indicate a time parameter, where the time parameter is greater than or equal to 0, and the time parameter is used to indicate the reserved duration .
  • the processor 73 is specifically configured to: when the time parameter is not 0, according to the first terminal that is sent by the second terminal device in the second terminal device set received by the receiver 72
  • the resource feedback field determines that the first resource block used by the transmitter 71 to send the first MAC PDU is a resource block used for sending the new MAC PDU.
  • the processor 73 is specifically configured to: when the time parameter is 0, according to one of the second terminal device sets received by the receiver 72. Determining a new resource block from the contention pool by using the first resource feedback field sent by the second terminal device and the second reservation indication field sent by all the second terminal devices in the second terminal device set A resource block used to send the new MAC PDU.
  • the processor 73 is further configured to: before the transmitter 71 sends the first media access control MAC protocol data unit PDU by using the first resource block, acquiring configuration information, where The configuration information includes: reservation indication information.
  • the processor 73 is further configured to determine, according to the reservation indication information that is obtained by the processor 73, a reservation duration, where the reserved duration is that the first terminal device performs the first resource block. The length of time to stay.
  • the first reserved indication field carried in the first MAC PDU sent by the sender 71 is further used to indicate a time parameter, where the time parameter is greater than or equal to 0, the time The parameter is used to indicate the reserved duration.
  • the processor 73 is specifically configured to: when the time parameter is 0, or the time parameter is not 0, according to one of the second terminal device sets received by the receiver 72 Determining, by the first resource feedback domain sent by the terminal device, the second reservation indication domain sent by all the second terminal devices in the second terminal device set, determining the new from the contention pool
  • the resource block is a resource block used for transmitting the new MAC PDU.
  • the processor 73 is further configured to: before the transmitter 71 sends the first medium access control MAC protocol data unit PDU by using the first resource block, according to the processor 73. Determining the reserved duration to configure the first reserved indication domain.
  • the reservation indication information acquired by the processor 73 includes indication information of a reserved duration, which is used to indicate a duration or duration range that can be reserved, or the processor
  • the reservation indication information that is obtained by the information includes the indication information of the reserved duration and the length information of the bearer reservation indication field.
  • the processor 73 is specifically configured to: when the reservation indication information acquired by the processor 73 includes indication information of a reserved duration, and the indication information of the reserved duration is used to indicate a duration that can be reserved. And determining, according to the indication information of the reserved duration, that the reservable duration is the reserved duration; if the reservation indication information acquired by the processor 73 includes a pre- Determining the reservable information according to the indication information of the reserved duration obtained by the processor 73, when the indication information of the reserved duration is used to indicate the range of the reservable duration Any one of the durations in the range of the duration is the reserved duration; if the reservation indication information acquired by the processor 73 includes the indication information of the reserved duration and the length information of the reserved reservation indication field, according to the processing The indication information of the reserved duration and the length information of the carrying reservation indication field obtained by the device 73 determine the reserved duration.
  • the processor 73 is further configured to: after the transmitter 71 sends the first media access control MAC protocol data unit PDU by using the first resource block, listening to the contention pool.
  • the processor 73 is further configured to determine a second resource feedback domain according to a reservation condition of the resource block in the contention pool that is monitored by the processor 73; the second resource feedback domain is used to indicate that the resource is sent The reservation of the resource block in the contention pool in the preceding MAC PDU.
  • the second resource feedback field is also carried in the first MAC PDU sent by the sender 71 by using the first resource block.
  • the configuration information acquired by the processor 73 further includes: resource feedback information.
  • the processor 73 is configured to generate the second according to the resource feedback information acquired by the processor 73 and the reservation of the resource block in the contention pool that the processor 73 listens to. Resource feedback domain.
  • the resource feedback information acquired by the processor 73 includes: condition information carrying a resource feedback domain and/or length information of a resource feedback domain.
  • the processor 73 is configured to: when the resource feedback information acquired by the processor 73 includes the condition information of the resource feedback domain, determine that the carrying resource acquired by the processor 73 is satisfied. When the condition information of the domain is fed back, the second resource feedback domain is generated according to the preset length information of the resource feedback domain and the reservation of the resource block in the contention pool that the processor 73 listens to; When the resource feedback information acquired by the processor 73 includes the length information of the resource feedback domain, the length information and the location of the carrying resource feedback domain included in the resource feedback information acquired by the processor 73 The second resource feedback domain is generated by the reservation of the resource block in the contention pool that is monitored by the processor 73; the resource feedback information acquired by the processor 73 includes the resource feedback domain When the condition information and the length information of the resource feedback domain are carried, when determining the condition information of the bearer resource feedback domain acquired by the processor 73, according to the Reserved resource blocks 73 acquires feedback information to the resource carrying the contention resource pool resource feedback length information field and the processor 73 includes a monitor to generate the
  • the processor 73 is specifically configured to acquire the pre-configured configuration information.
  • the receiver 72 is further configured to receive the configuration information sent by the network device.
  • the first reservation indication field is included in the MAC header of the first MAC PDU sent by the sender 71; the MAC header further includes an extension indication field, Instructing whether the first MAC PDU carries the second resource feedback domain, and when the extension indication field indicates that the first MAC PDU carries the second resource feedback domain, the second resource feedback domain includes In the MAC header of the first MAC PDU sent by the sender 71.
  • the first reserved indication field is included in the transmitter 71.
  • the first terminal device provided by the embodiment of the present invention sends, by using the first resource block, a first MAC PDU carrying a first reserved indication field for indicating that the first resource block is reserved, and then receiving the second terminal. And sending, by the second resource block, the second MAC PDU that is sent by the second resource block to indicate that the first resource block is successfully reserved by the first resource feedback domain, according to a second terminal device in the second terminal device set.
  • the first resource feedback field carried by the sent second MAC PDU determines that the first resource block is a resource block used for transmitting a new MAC PDU, and sends a new MAC PDU through the first resource block.
  • the first terminal device indicates that the first resource block is reserved by using the first reserved indication field, and determines that the first resource block is successfully reserved according to the resource feedback field carried in the received MAC PDU sent by the other terminal device. That is, when there is no resource collision, the first resource block is continuously used for the transmission of the new MAC PDU, and the first resource block is determined to be unsuccessful according to the resource feedback field carried in the received MAC PDU sent by the other terminal device. Reserved, that is, when there is a resource collision, the new resource block is reselected for transmission of a new MAC PDU, which effectively reduces the collision rate of the transmission resource and improves the transmission efficiency.
  • the first resource block is reserved by the first terminal device, which is determined by the reservation indication information in the configuration information, and the first resource block is reserved, so that one terminal device keeps using a resource block all the time. The situation realizes the fairness of network resource allocation.
  • the network device may include: a transmitter 81.
  • the transmitter 81 is configured to send configuration information to the first terminal device, where the configuration information includes reservation indication information.
  • the reservation indication information sent by the sender 81 includes: indication information of a reserved duration, which is used to indicate a duration or duration range that can be reserved.
  • the reservation indication information sent by the sender 81 includes: the indication information of the reserved duration and the length information of the bearer reservation indication field.
  • the configuration information that is sent by the sender 81 further includes: resource feedback information, where the resource feedback information includes: condition information carrying a resource feedback domain and/or carrying a resource feedback domain. Length information.
  • the transmitter 81 is specifically configured to send the configuration information to the first terminal device by using system information or radio resource control RRC signaling.
  • the configuration information sent by the sender 81 further includes: information of a contention pool.
  • the network device provided by the embodiment of the present invention, by sending configuration information including the reservation indication information to the first terminal device, enables the first terminal device to reserve the first resource block according to the determination by the reservation indication information.
  • the length of time is reserved for the first resource block, which avoids the situation that a terminal device always uses a certain resource block, and realizes the fairness of network resource allocation.
  • the disclosed apparatus and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the modules or units is only a logical function division.
  • there may be another division manner for example, multiple units or components may be used.
  • the combination may be integrated into another device, or some features may be ignored or not performed.
  • 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, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may be one physical unit or multiple physical units, that is, may be located in one place, or may be distributed to multiple different places. . Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in various embodiments of the present invention can be integrated in one place In the unit, it is also possible that each unit physically exists alone, 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 integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a readable storage medium. Based on such understanding, the technical solution of the present invention may contribute to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a device (which may be a microcontroller, chip, etc.) or a processor to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read only memory (English: Read-Only Memory, abbreviated as: ROM), a random access memory (English: Random Access Memory, abbreviated as: RAM), a magnetic disk or an optical disk, and the like.
  • ROM Read-Only Memory
  • RAM Random Access Memory

Abstract

本发明公开了一种终端设备、网络设备及数据传输方法，涉及通信领域，解决了由于传输资源碰撞，导致的传输效率较低的问题。具体方案为：发送单元通过第一资源块发送携带有用于指示将第一资源块进行预留的第一预留指示域的第一MAC PDU；接收单元接收第二终端设备集合通过第二资源块发送的第二MAC PDU；第二MAC PDU中携带有用于指示第一资源块被成功预留的第一资源反馈域；确定单元根据接收单元接收到的第二终端设备集合中的一个第二终端设备发送的第一资源反馈域，确定第一资源块为发送新的MAC PDU采用的资源块；发送单元通过确定单元确定的第一资源块发送新的MAC PDU。本发明用于数据传输的过程中。

Description

一种终端设备、网络设备及数据传输方法 技术领域
本发明涉及通信领域，尤其涉及一种终端设备、网络设备及数据传输方法。
背景技术
随着社会的不断发展，汽车的普及程度越来越高，驾驶出行在给人们出行带来便利的同时，也给人类社会带来一些负面影响，例如，交通事故的频发。为了能够降低交通事故的发生概率，车辆可以通过车辆与车辆(英文：Vehicle to Vehicle，简称：V2V)通信来获取其他车辆广播的包括车速、行驶方向、具体位置、是否踩了紧急刹车等V2V信息，并根据获取到的V2V信息获知路况信息，这样驾驶员便可以根据获取到的路况信息更好的感知视距外的交通状况，从而对危险状况做出预判并进行及时避让。
众所周知，长期演进(英文：Long Term Evolution，简称：LTE)是目前主流的无线通信技术，其中的设备到设备(英文：Device to Device，简称：D2D)技术已被作为重要特性且进行了标准化工作，由于D2D技术支持终端设备之间的直连通信，因此，车辆与车辆之间也可以通过采用D2D技术进行V2V信息的传输。具体的，在车辆采用D2D技术进行V2V信息传输时，首先需在资源池内随机选择一个资源块，然后再用选择出的资源块发送需传输的V2V信息。
现有技术中至少存在如下问题：由于在采用D2D技术进行V2V信息传输时，车辆采用的是随机发送的自由竞争机制，即在资源池中随机选择一个资源块作为发送V2V信息所需的资源，而这种机制会存在多个邻近的车辆选择了相同的资源块用于自身V2V信息发送的情况，这样便会引起传输资源的碰撞，使得其他车辆无法成功解调出车辆发送的V2V信息，并且，随着车辆密度的增加，传输资源的碰撞会越发严重，导致传输效率较低的问题出现。
发明内容
本发明提供一种终端设备、网络设备及数据传输方法，解决了由于传输资源碰撞，导致的传输效率较低的问题。
本发明的第一方面，提供一种第一终端设备，包括：
发送单元，用于通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU；所述第一MAC PDU中携带有第一预留指示域，用于指示所述第一终端设备将所述第一资源块进行预留；
接收单元，用于接收第二终端设备集合通过第二资源块发送的第二MAC PDU；所述第二终端设备集合中包含至少一个第二终端设备，所述第二MAC PDU中携带有第一资源反馈域，用于指示所述第一资源块被成功预留；
确定单元，用于根据所述接收单元接收到的所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域，确定所述发送单元发送所述第一MAC PDU采用的所述第一资源块为发送新的MAC PDU采用的资源块；
所述发送单元，还用于通过所述确定单元确定的所述第一资源块发送所述新的MAC PDU。
结合第一方面，在一种可能的实现方式中，
所述接收单元接收的所述第二MAC PDU中还携带有第二预留指示域，用于指示所述第二终端设备将所述第二资源块进行预留。
结合第一方面或上述可能的实现方式，在另一种可能的实现方式中，所述接收单元接收到的所述第二MAC PDU中携带的所述第一资源反馈域用于指示所述第一资源块未被成功预留，
所述确定单元，还用于根据接收单元接收到的所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域和所述第二终端设备集合中的所有所述第二终端设备发送的所述第二预留指示域，从竞争资源池中确定新的资源块为发送所述新的MAC PDU采用的资源块；
所述发送单元，还用于通过所述确定单元确定的所述新的资源 块发送所述新的MAC PDU。
结合第一方面或上述可能的实现方式，在另一种可能的实现方式中，还包括：
获取单元，用于在所述发送单元通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU之前，获取配置信息，所述配置信息包括：预留指示信息；
所述确定单元，还用于根据所述获取单元获取到的所述预留指示信息确定定时器的定时时间；所述定时时间为所述第一终端设备将所述第一资源块进行预留的时间长度；
启动单元，用于在所述发送单元通过所述第一资源块发送所述第一MAC PDU时，启动所述定时器；
所述确定单元，具体用于当所述启动单元启动的所述定时器未停止计时时，根据所述接收单元接收到的所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域，确定所述发送单元发送所述第一MAC PDU采用的所述第一资源块为发送所述新的MAC PDU采用的资源块。
结合第一方面或上述可能的实现方式，在另一种可能的实现方式中，
所述确定单元，具体用于当所述启动单元启动的所述定时器停止计时时，根据所述接收单元接收到的所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域和所述第二终端设备集合中的所有所述第二终端设备发送的所述第二预留指示域，从竞争资源池中确定新的资源块为发送所述新的MAC PDU采用的资源块。
结合第一方面或上述可能的实现方式，在另一种可能的实现方式中，还包括：
获取单元，用于在所述发送单元通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU之前，获取配置信息，所述配置信息包括：预留指示信息；
所述确定单元，还用于根据所述获取单元获取到的所述预留指示信息确定定时器的定时时间；所述定时时间为所述第一终端设备将所述第一资源块进行预留的时间长度；
启动单元，用于在所述发送单元通过所述第一资源块发送所述第一MAC PDU时，启动所述定时器；
所述确定单元，具体用于当所述启动单元启动的所述定时器停止计时，或者所述启动单元启动的所述定时器未停止计时时，根据所述接收单元接收到的所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域和所述第二终端设备集合中的所有所述第二终端设备发送的所述第二预留指示域，从所述竞争资源池中确定所述新的资源块为发送所述新的MAC PDU采用的资源块。
结合第一方面或上述可能的实现方式，在另一种可能的实现方式中，所述获取单元获取到的所述预留指示信息包括预留时长的指示信息，用于指示可预留的时长或时长范围；
所述确定单元，具体用于：
当所述获取单元获取到的所述预留时长的指示信息用于指示可预留的时长时，根据所述获取单元获取到的所述预留时长的指示信息确定所述可预留的时长为所述定时器的定时时间；或者，
当所述获取单元获取到的所述预留时长的指示信息用于指示可预留的时长范围时，根据所述获取单元获取到的所述预留时长的指示信息确定所述可预留的时长范围内的任意一个时长为所述定时器的定时时间。
结合第一方面或上述可能的实现方式，在另一种可能的实现方式中，还包括：
获取单元，用于在所述发送单元通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU之前，获取配置信息，所述配置信息包括：预留指示信息；
所述确定单元，还用于根据所述获取单元获取到的所述预留指示信息确定预留时长；所述预留时长为所述第一终端设备将所述第 一资源块进行预留的时间长度；
所述发送单元发送的第一MAC PDU中携带的所述第一预留指示域还用于指示时间参数，所述时间参数大于或等于0，所述时间参数用于表示所述预留时长；
所述确定单元，具体用于当所述时间参数不为0时，根据所述接收单元接收到的所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域，确定所述发送单元发送所述第一MAC PDU采用的所述第一资源块为发送所述新的MAC PDU采用的资源块。
结合第一方面或上述可能的实现方式，在另一种可能的实现方式中，
所述确定单元，具体用于当所述时间参数为0时，根据所述接收单元接收到的所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域和所述第二终端设备集合中的所有所述第二终端设备发送的所述第二预留指示域，从竞争资源池中确定新的资源块为发送所述新的MAC PDU采用的资源块。
结合第一方面或上述可能的实现方式，在另一种可能的实现方式中，还包括：
获取单元，用于在所述发送单元通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU之前，获取配置信息，所述配置信息包括：预留指示信息；
所述确定单元，还用于根据所述获取单元获取到的所述预留指示信息确定预留时长；所述预留时长为所述第一终端设备将所述第一资源块进行预留的时间长度；
所述发送单元发送的第一MAC PDU中携带的所述第一预留指示域还用于指示时间参数，所述时间参数大于或等于0，所述时间参数用于表示所述预留时长；
所述确定单元，具体用于当所述时间参数为0，或者所述时间参数不为0时，根据所述接收单元接收到的所述第二终端设备集合 中的一个所述第二终端设备发送的所述第一资源反馈域和所述第二终端设备集合中的所有所述第二终端设备发送的所述第二预留指示域，从所述竞争资源池中确定所述新的资源块为发送所述新的MAC PDU采用的资源块。
结合第一方面或上述可能的实现方式，在另一种可能的实现方式中，还包括：
配置单元，用于在所述发送单元通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU之前，根据所述确定单元确定的所述预留时长配置所述第一预留指示域。
结合第一方面或上述可能的实现方式，在另一种可能的实现方式中，所述获取单元获取到的所述预留指示信息包括预留时长的指示信息，用于指示可预留的时长或时长范围，或者，所述获取单元获取到的所述预留指示信息包括所述预留时长的指示信息和携带预留指示域的长度信息；
所述确定单元，具体用于：
若所述获取单元获取到的所述预留指示信息包括预留时长的指示信息，且所述预留时长的指示信息用于指示可预留的时长时，根据所述获取单元获取到的所述预留时长的指示信息确定所述可预留的时长为所述预留时长；
若所述获取单元获取到的所述预留指示信息包括预留时长的指示信息，且所述预留时长的指示信息用于指示可预留的时长范围时，根据所述获取单元获取到的所述预留时长的指示信息确定所述可预留的时长范围内的任意一个时长为所述预留时长；
若所述获取单元获取到的所述预留指示信息包括预留时长的指示信息和携带预留指示域的长度信息，根据所述获取单元获取到的所述预留时长的指示信息和携带预留指示域的长度信息确定所述预留时长。
结合第一方面或上述可能的实现方式，在另一种可能的实现方式中，还包括：
监听单元，用于在所述发送单元通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU之前，监听竞争资源池；
所述确定单元，还用于根据所述监听单元监听到的所述竞争资源池中的资源块的预留情况确定第二资源反馈域；所述第二资源反馈域用于指示在发送所述第一MAC PDU前所述竞争资源池中资源块的预留情况；
所述发送单元通过所述第一资源块发送的所述第一MAC PDU中还携带有所述第二资源反馈域。
结合第一方面或上述可能的实现方式，在另一种可能的实现方式中，所述获取单元获取的所述配置信息中还包括：资源反馈信息；
所述确定单元，具体用于根据所述获取单元获取到的所述资源反馈信息和所述监听单元监听到的所述竞争资源池中的资源块的预留情况生成所述第二资源反馈域。
结合第一方面或上述可能的实现方式，在另一种可能的实现方式中，所述获取单元获取到的所述资源反馈信息包括：携带资源反馈域的条件信息和/或携带资源反馈域的长度信息；
所述确定单元，具体用于：
当所述获取单元获取到的所述资源反馈信息包括所述携带资源反馈域的条件信息时，在确定满足所述获取单元获取到的所述携带资源反馈域的条件信息时，根据预设的携带资源反馈域的长度信息和所述监听单元监听到的所述竞争资源池中的资源块的预留情况生成所述第二资源反馈域；
当所述获取单元获取到的所述资源反馈信息包括所述携带资源反馈域的长度信息时，根据所述获取单元获取到的所述资源反馈信息包括的携带资源反馈域的长度信息和所述监听单元监听到的所述竞争资源池中的资源块的预留情况生成所述第二资源反馈域；
当所述获取单元获取到的所述资源反馈信息包括所述携带资源反馈域的条件信息和所述携带资源反馈域的长度信息时，在确定满足所述获取单元获取到的所述携带资源反馈域的条件信息时，根据 所述获取单元获取到的所述资源反馈信息包括的携带资源反馈域的长度信息和所述监听单元监听到的所述竞争资源池中的资源块的预留情况生成所述第二资源反馈域。
结合第一方面或上述可能的实现方式，在另一种可能的实现方式中，
所述获取单元，具体用于获取预先配置的所述配置信息，或者，接收网络设备发送的所述配置信息。
结合第一方面或上述可能的实现方式，在另一种可能的实现方式中，
所述第一预留指示域包含在所述发送单元发送的所述第一MAC PDU的MAC头中；
所述MAC头中还包含延展指示域，用于指示所述第一MAC PDU是否携带所述第二资源反馈域，并当所述延展指示域指示所述第一MAC PDU携带所述第二资源反馈域时，所述第二资源反馈域包含在所述发送单元发送的所述第一MAC PDU的MAC头中。
结合第一方面或上述可能的实现方式，在另一种可能的实现方式中，
当所述发送单元发送的所述第一MAC PDU携带所述第一预留指示域时，所述第一预留指示域包含在所述发送单元发送的所述第一MAC PDU的有效载荷payload域中，且所述发送单元发送的所述第一MAC PDU的MAC头中包含MAC子头，用于指示所述MAC子头对应的数据为所述第一预留指示域；
或者，
当所述发送单元发送的所述第一MAC PDU携带所述第一预留指示域和所述第二资源反馈域时，所述第一预留指示域和所述第二资源反馈域包含在所述发送单元发送的所述第一MAC PDU的payload域中，且所述发送单元发送的所述第一MAC PDU的MAC头中包含MAC子头，用于指示所述MAC子头对应的数据为所述第一预留指示域和所述第二资源反馈域。
本发明的第二方面，提供一种网络设备，包括：
发送单元，用于向第一终端设备发送配置信息；所述配置信息包括预留指示信息。
结合第二方面，在一种可能的实现方式中，所述发送单元发送的所述预留指示信息包括：预留时长的指示信息，用于指示可预留的时长或时长范围；
或者，所述发送单元发送的所述预留指示信息包括：所述预留时长的指示信息和携带预留指示域的长度信息。
结合第二方面或上述可能的实现方式，在另一种可能的实现方式中，
所述发送单元发送的所述配置信息还包括：资源反馈信息；所述资源反馈信息包括：携带资源反馈域的条件信息和/或携带资源反馈域的长度信息。
结合第二方面或上述可能的实现方式，在另一种可能的实现方式中，
所述发送单元，具体用于通过系统信息或无线资源控制RRC信令向所述第一终端设备发送所述配置信息。
本发明的第三方面，提供一种数据传输方法，包括：
第一终端设备通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU；所述第一MAC PDU中携带有第一预留指示域，用于指示所述第一终端设备将所述第一资源块进行预留；
所述第一终端设备接收第二终端设备集合通过第二资源块发送的第二MAC PDU；所述第二终端设备集合中包含至少一个第二终端设备，所述第二MAC PDU中携带有第一资源反馈域，用于指示所述第一资源块被成功预留；
所述第一终端设备根据所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域，确定所述第一资源块为发送新的MAC PDU采用的资源块；
所述第一终端设备通过所述第一资源块发送所述新的MAC  PDU。
结合第三方面，在一种可能的实现方式中，所述第二MAC PDU中还携带有第二预留指示域，用于指示所述第二终端设备将所述第二资源块进行预留。
结合第三方面或上述可能的实现方式，在另一种可能的实现方式中，所述第一资源反馈域用于指示所述第一资源块未被成功预留，所述方法还包括：
所述第一终端设备根据所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域和所述第二终端设备集合中的所有所述第二终端设备发送的所述第二预留指示域，从竞争资源池中确定新的资源块为发送所述新的MAC PDU采用的资源块；
所述第一终端设备通过所述新的资源块发送所述新的MAC PDU。
结合第三方面或上述可能的实现方式，在另一种可能的实现方式中，在所述第一终端设备通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU之前，所述方法还包括：
所述第一终端设备获取配置信息，所述配置信息包括：预留指示信息；
所述第一终端设备根据所述预留指示信息确定定时器的定时时间；所述定时时间为所述第一终端设备将所述第一资源块进行预留的时间长度；
在所述第一终端设备通过所述第一资源块发送所述第一MAC PDU时，所述第一终端设备启动所述定时器；
所述第一终端设备根据所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域，确定所述第一资源块为发送新的MAC PDU采用的资源块，包括：
当所述定时器未停止计时时，所述第一终端设备根据所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域，确定所述第一资源块为发送所述新的MAC PDU采用的资源块。
结合第三方面或上述可能的实现方式，在另一种可能的实现方式中，所述方法还包括：
当所述定时器停止计时时，所述第一终端设备根据所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域和所述第二终端设备集合中的所有所述第二终端设备发送的所述第二预留指示域，从竞争资源池中确定新的资源块为发送所述新的MAC PDU采用的资源块。
结合第三方面或上述可能的实现方式，在另一种可能的实现方式中，在所述第一终端设备通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU之前，所述方法还包括：
所述第一终端设备获取配置信息，所述配置信息包括：预留指示信息；
所述第一终端设备根据所述预留指示信息确定定时器的定时时间；所述定时时间为所述第一终端设备将所述第一资源块进行预留的时间长度；
在所述第一终端设备通过所述第一资源块发送所述第一MAC PDU时，所述第一终端设备启动所述定时器；
所述第一终端设备根据所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域和所述第二终端设备集合中的所有所述第二终端设备发送的所述第二预留指示域，从竞争资源池中确定新的资源块为发送所述新的MAC PDU采用的资源块，包括：
当所述定时器停止计时，或者所述定时器未停止计时时，所述第一终端设备根据所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域和所述第二终端设备集合中的所有所述第二终端设备发送的所述第二预留指示域，从所述竞争资源池中确定所述新的资源块为发送所述新的MAC PDU采用的资源块。
结合第三方面或上述可能的实现方式，在另一种可能的实现方式中，所述预留指示信息包括预留时长的指示信息，用于指示可预 留的时长或时长范围；
所述第一终端设备根据所述预留指示信息确定定时器的定时时间，包括：
当所述预留时长的指示信息用于指示可预留的时长时，所述第一终端设备根据所述预留时长的指示信息确定所述可预留的时长为所述定时器的定时时间；或者，
当所述预留时长的指示信息用于指示可预留的时长范围时，所述第一终端设备根据所述预留时长的指示信息确定所述可预留的时长范围内的任意一个时长为所述定时器的定时时间。
结合第三方面或上述可能的实现方式，在另一种可能的实现方式中，在所述第一终端设备通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU之前，所述方法还包括：
所述第一终端设备获取配置信息，所述配置信息包括：预留指示信息；
所述第一终端设备根据所述预留指示信息确定预留时长，所述预留时长为所述第一终端设备将所述第一资源块进行预留的时间长度；
所述第一预留指示域还用于指示时间参数，所述时间参数大于或等于0，所述时间参数用于表示所述预留时长；
所述第一终端设备根据所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域，确定所述第一资源块为发送新的MAC PDU采用的资源块，包括：
当所述时间参数不为0时，所述第一终端设备根据所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域，确定所述第一资源块为发送所述新的MAC PDU采用的资源块。
结合第三方面或上述可能的实现方式，在另一种可能的实现方式中，所述方法还包括：
当所述时间参数为0时，所述第一终端设备根据所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域和 所述第二终端设备集合中的所有所述第二终端设备发送的所述第二预留指示域，从竞争资源池中确定新的资源块为发送所述新的MAC PDU采用的资源块。
结合第三方面或上述可能的实现方式，在另一种可能的实现方式中，在所述第一终端设备通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU之前，所述方法还包括：
所述第一终端设备获取配置信息，所述配置信息包括：预留指示信息；
所述第一终端设备根据所述预留指示信息确定预留时长，所述预留时长为所述第一终端设备将所述第一资源块进行预留的时间长度；
所述第一预留指示域还用于指示时间参数，所述时间参数大于或等于0，所述时间参数用于表示所述预留时长；
所述第一终端设备根据所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域和所述第二终端设备集合中的所有所述第二终端设备发送的所述第二预留指示域，从竞争资源池中确定新的资源块为发送所述新的MAC PDU采用的资源块，包括：
当所述时间参数为0，或者所述时间参数不为0时，所述第一终端设备根据所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域和所述第二终端设备集合中的所有所述第二终端设备发送的所述第二预留指示域，从所述竞争资源池中确定所述新的资源块为发送所述新的MAC PDU采用的资源块。
结合第三方面或上述可能的实现方式，在另一种可能的实现方式中，在所述第一终端设备通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU之前，还包括：
所述第一终端设备根据所述预留时长配置所述第一预留指示域。
结合第三方面或上述可能的实现方式，在另一种可能的实现方 式中，所述预留指示信息包括预留时长的指示信息，用于指示可预留的时长或时长范围，或者，所述预留指示信息包括所述预留时长的指示信息和携带预留指示域的长度信息；
所述第一终端设备根据所述预留指示信息确定预留时长，包括：
若所述预留指示信息包括预留时长的指示信息，且所述预留时长的指示信息用于指示可预留的时长时，所述第一终端设备根据所述预留时长的指示信息确定所述可预留的时长为所述预留时长；
若所述预留指示信息包括预留时长的指示信息，且所述预留时长的指示信息用于指示可预留的时长范围时，所述第一终端设备根据所述预留时长的指示信息确定所述可预留的时长范围内的任意一个时长为所述预留时长；
若所述预留指示信息包括预留时长的指示信息和携带预留指示域的长度信息，所述第一终端设备根据所述预留时长的指示信息和携带预留指示域的长度信息确定所述预留时长。
结合第三方面或上述可能的实现方式，在另一种可能的实现方式中，在所述第一终端设备通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU之前，所述方法还包括：
所述第一终端设备监听竞争资源池，并根据监听到的所述竞争资源池中的资源块的预留情况确定第二资源反馈域；所述第二资源反馈域用于指示在发送所述第一MAC PDU前所述竞争资源池中资源块的预留情况；
所述第一终端设备通过所述第一资源块发送的所述第一MAC PDU中还携带有所述第二资源反馈域。
结合第三方面或上述可能的实现方式，在另一种可能的实现方式中，所述配置信息中还包括：资源反馈信息；
所述根据监听到的所述竞争资源池中的资源块的预留情况确定第二资源反馈域，包括：
所述第一终端设备根据所述资源反馈信息和监听到的所述竞争资源池中的资源块的预留情况生成所述第二资源反馈域。
结合第三方面或上述可能的实现方式，在另一种可能的实现方式中，所述资源反馈信息包括：携带资源反馈域的条件信息和/或携带资源反馈域的长度信息；
所述第一终端设备根据所述资源反馈信息和监听到的所述竞争资源池中的资源块的预留情况生成所述第二资源反馈域，包括：
当所述资源反馈信息包括所述携带资源反馈域的条件信息时，在所述第一终端设备确定满足所述携带资源反馈域的条件信息时，根据预设的携带资源反馈域的长度信息和监听到的所述竞争资源池中的资源块的预留情况生成所述第二资源反馈域；
当所述资源反馈信息包括所述携带资源反馈域的长度信息时，所述第一终端设备根据所述资源反馈信息包括的携带资源反馈域的长度信息和监听到的所述竞争资源池中的资源块的预留情况生成所述第二资源反馈域；
当所述资源反馈信息包括所述携带资源反馈域的条件信息和所述携带资源反馈域的长度信息时，在所述第一终端设备确定满足所述携带资源反馈域的条件信息时，根据所述资源反馈信息包括的携带资源反馈域的长度信息和监听到的所述竞争资源池中的资源块的预留情况生成所述第二资源反馈域。
结合第三方面或上述可能的实现方式，在另一种可能的实现方式中，所述第一终端设备获取配置信息，包括：
所述第一终端设备获取预先配置的所述配置信息；
或者，
所述第一终端设备接收网络设备发送的所述配置信息。
结合第三方面或上述可能的实现方式，在另一种可能的实现方式中，
所述第一预留指示域包含在所述第一MAC PDU的MAC头中；
所述MAC头中还包含延展指示域，用于指示所述第一MAC PDU是否携带所述第二资源反馈域，并当所述延展指示域指示所述第一MAC PDU携带所述第二资源反馈域时，所述第二资源反馈域 包含在所述第一MAC PDU的MAC头中。
结合第三方面或上述可能的实现方式，在另一种可能的实现方式中，
当所述第一MAC PDU携带所述第一预留指示域时，所述第一预留指示域包含在所述第一MAC PDU的有效载荷payload域中，且所述第一MAC PDU的MAC头中包含MAC子头，用于指示所述MAC子头对应的数据为所述第一预留指示域；
或者，
当所述第一MAC PDU携带所述第一预留指示域和所述第二资源反馈域时，所述第一预留指示域和所述第二资源反馈域包含在所述第一MAC PDU的payload域中，且所述第一MAC PDU的MAC头中包含MAC子头，用于指示所述MAC子头对应的数据为所述第一预留指示域和所述第二资源反馈域。
本发明的第四方面，提供一种数据传输方法，包括：
网络设备向第一终端设备发送配置信息；所述配置信息包括预留指示信息。
结合第四方面，在一种可能的实现方式中，
所述预留指示信息包括：预留时长的指示信息，用于指示可预留的时长或时长范围；
或者，所述预留指示信息包括：所述预留时长的指示信息和携带预留指示域的长度信息。
结合第四方面或上述可能的实现方式，在另一种可能的实现方式中，
所述配置信息还包括：资源反馈信息；所述资源反馈信息包括：携带资源反馈域的条件信息和/或携带资源反馈域的长度信息。
结合第四方面或上述可能的实现方式，在另一种可能的实现方式中，所述网络设备向第一终端设备发送配置信息，包括：
所述网络设备通过系统信息或无线资源控制RRC信令向所述第一终端设备发送所述配置信息。
本发明实施例提供的终端设备、网络设备及数据传输方法，第一终端设备通过第一资源块发送携带有用于指示将该第一资源块进行预留的第一预留指示域的第一MAC PDU，然后在接收到第二终端设备集合通过第二资源块发送的携带有用于指示第一资源块被成功预留第一资源反馈域的第二MAC PDU之后，根据该第二终端设备集合中的一个第二终端设备发送的第二MAC PDU携带的第一资源反馈域确定第一资源块为发送新的MAC PDU采用的资源块，并通过该第一资源块发送新的MAC PDU。第一终端设备通过第一预留指示域指示将第一资源块进行预留，并在根据接收到的其他终端设备发送的MAC PDU中携带的资源反馈域确定第一资源块被成功预留，即不存在资源碰撞时，继续使用该第一资源块进行新的MAC PDU的传输，这样有效降低了传输资源的碰撞率，提升了传输效率。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中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性的前提下，还可以根据这些附图获得其他的附图。
图1为车辆之间采用V2V技术通信示意图；
图2为用户设备之间采用D2D技术通信示意图；
图3为车辆之间采用D2D技术通信示意图；
图4为现有技术提供的一种媒体接入控制协议数据单元的格式示意图；
图5为本发明一实施例提供的一种第一终端设备组成示意图；
图6为本发明一实施例提供的另一种第一终端设备组成示意图；
图7为本发明另一实施例提供的一种网络设备组成示意图；
图8为本发明另一实施例提供的一种数据传输方法流程示意图；
图9为本发明另一实施例提供的一种数据传输方法流程示意图；
图10为本发明另一实施例提供的一种数据传输方法流程示意图；
图11为本发明另一实施例提供的一种第一MAC PDU的格式示意图；
图12为本发明另一实施例提供的另一种第一MAC PDU的格式示意图；
图13为本发明另一实施例提供的又一种第一MAC PDU的格式示意图；
图14为本发明另一实施例提供的再一种第一MAC PDU的格式示意图；
图15为本发明另一实施例提供的一种数据传输方法流程示意图；
图16为本发明另一实施例提供的一种竞争资源池示意图；
图17为本发明另一实施例提供的一种第一终端设备组成示意图；
图18为本发明另一实施例提供的一种网络设备组成示意图。
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，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
本文中描述的技术可用于各种通信系统，如当前2G，3G通信系统和下一代通信系统，例如，全球移动通信(英文：Global System for Mobile communications，简称：GSM)系统，码分多址(英文：Code Division Multiple Access，简称：CDMA)系统，时分多址(英文：Time Division Multiple Access，简称：TDMA)系统，宽带码分 多址(英文：Wideband Code Division Multiple Access Wireless，简称：WCDMA)系统，频分多址(英文：Frequency Division Multiple Addressing，简称：FDMA)系统，正交频分多址(英文：Orthogonal Frequency-Division Multiple Access，简称：OFDMA)系统，单载波FDMA(SC-FDMA)系统，通用分组无线业务(英文：General Packet Radio Service，简称：GPRS)系统，长期演进(英文：Long Term Evolution，简称：LTE)系统，以及其他此类通信系统。
本文中结合终端和/或基站和/或基站节点来描述各种方面。
用户设备，可以是无线终端也可以是有线终端，无线终端可以是指向用户提供语音和/或数据连通性的设备，具有无线连接功能的手持式设备、或连接到无线调制解调器的其他处理设备。无线终端可以经无线接入网(英文：Radio Access Network，简称：RAN)与一个或多个核心网进行通信，无线终端可以是移动终端，如移动电话(或称为“蜂窝”电话)和具有移动终端的计算机，例如，可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置，它们与无线接入网交换语言和/或数据。例如，个人通信业务(英文：Personal Communication Service，简称：PCS)电话、无绳电话、会话发起协议(英文：Session Initiation Protocol，简称：SIP)话机、无线本地环路(英文：Wireless Local Loop，简称：WLL)站、个人数字助理(英文：Personal Digital Assistant，简称：PDA)等设备。无线终端也可以称为系统、订户单元(Subscriber Unit)、订户站(Subscriber Station)，移动站(Mobile Station)、移动台(Mobile)、远程站(Remote Station)、接入点(Access Point)、远程终端(Remote Terminal)、接入终端(Access Terminal)、用户终端(User Terminal)、用户代理(User Agent)、用户设备(英文：User Equipment，简称：UE)。
基站(例如，接入点)可以是指接入网中在空中接口上通过一个或多个扇区与无线终端通信的设备。基站可用于将收到的空中帧与IP分组进行相互转换，作为无线终端与接入网的其余部分之间的 路由器，其中接入网的其余部分可包括网际协议(英文：Internet Protocol，简称：IP)网络。基站还可协调对空中接口的属性管理。例如，基站可以是GSM或CDMA中的基站(英文：Base Transceiver Station，简称：BTS)，也可以是WCDMA中的基站(NodeB)，还可以是LTE中的演进型基站(英文：evolutional Node B，简称：NodeB或eNB或e-NodeB)，本申请并不限定。
另外，本文中术语“系统”和“网络”在本文中常被可互换使用。
目前，为了能够降低交通事故的发生概率，车辆可以通过V2V通信及时获取路况信息或接收信息服务。如图1所示，车辆获取路况信息的具体过程是，车辆1通过V2V通信，将自身的车速、行驶方向、具体位置、是否踩了紧急刹车等V2V信息进行广播，此时处于车辆1周围的车辆，即车辆2和车辆3便可以接收车辆1广播的V2V信息，在车辆2和车辆3成功接收到车辆1广播的V2V信息之后，便可以根据车辆1的车速、行驶方向、具体位置、是否踩了紧急刹车等V2V信息获知路况信息，此时驾驶员便可以根据路况信息对危险状况做出预判并及时避让，从而避免交通事故的发生。其中，车辆与车辆之间采用V2V通信所传输的V2V信息在美国的车载环境无线接入(英文：wireless access in vehicular environments，简称：WAVE)协议中称为基本安全信息(英文：Basic Safety Message，简称：BSM)，在欧洲的智能交通(英文：Intelligent Transportation System，简称：ITS)中称为协作感知消息(英文：Cooperative Awareness Message，简称：CAM)或分散式环境通知消息(英文：Decentralized Environmental Notification Message，简称：DEMN)。
考虑到LTE是目前主流的无线通信技术，且LTE中的D2D技术支持终端设备之间的直连通信(例如，如图2所示的UE1与UE2之间的直连通信)，而V2V通信也属于设备之间的直连通信，因此，如图3所示，可以通过D2D技术来进行V2V信息的传输。
众所周知，D2D技术可以分为D2D探索(discovery)和D2D 通信(communication)两类技术，且这两类技术均存在分布式的传输模式，其中，D2D discovery的分布式传输模式称为D2D discovery类型(type)1，D2D communication的分布式传输模式称为D2D communication模式(mode)2。通常情况下，在分布式的传输模式下，网络资源被划分为一个或多个资源池，终端设备需要传输数据时，采用随机发送的自由竞争机制发送数据，即需要在资源池内随机选择一个资源块用于数据的传输。
例如，在D2D communication技术的D2D communication mode 2下，车辆1需要传输V2V信息。其中，该模式下，网络资源被划分为调度分配(英文：Scheduiing Assignment，简称：SA)资源池和数据资源池两部分。例如，在图3所示的应用场景下，车辆1发送V2V信息的具体过程为：当车辆1有V2V信息产生时，首先随机在SA资源池中选择一个SA资源块广播SA信息，其中，该SA信息用于指示一块数据资源池中的时频资源位置以及调制编码方式，SA信息所指示的时频资源位置也是由车辆1从数据资源池中随机选择的；然后车辆1在数据资源池的相应时频资源位置，按照SA信息所指示的调制编码方式广播生成的V2V信息。此时，处于车辆1周围的车辆，如车辆2若在SA资源池检索到车辆1广播的SA信息并解码成功，那么车辆2便可以按照SA信息所指示的数据资源池的时频资源位置，接收车辆1广播的V2V信息，并按照SA信息所指示的调制编码方式进行解码，以成功接收到车辆1广播的V2V信息。其中，车辆1发送的V2V信息具体的包含在媒体接入控制(英文：Media Access Control，简称：MAC)协议数据单元(英文：Protocol Data Unit，简称：PDU)中，该MAC PDU的格式如图4所示，其中，源标识(英文：identify，简称：ID)域，用于指示发送端(如车辆1)的ID，目的ID域，用于指示接收端的ID，如，可以用于指示一个组的ID，还可以用于指示一类业务的ID，当然，对于广播的发送形式，该目的ID域也可以被忽略，专用MAC子头(Typical MAC sub-headers)域，用于指示有效载荷(payload)域中包含的各 部分数据，有效载荷(payload)域中包含数据，V2V信息包含在payload域中。
由上可以看出，在采用D2D技术进行V2V信息传输时，车辆采用的是随机发送的自由竞争机制，这种机制会存在多个邻近的车辆选择了相同的时频资源用于自身V2V信息的发送，例如，在图1所示的应用场景下，车辆2和车辆3都选择了时频资源1用于自身V2V信息的发送，这样便会引起传输资源的碰撞，使得其他车辆(如，车辆1)无法成功解调出车辆2和车辆3发送的V2V信息，从而导致传输效率较低的问题出现。采用本发明提供的数据传输方法，可以很好的解决上述问题。
为了便于本领域技术人员的理解，本发明通过以下实施例对本发明提供的技术方案的具体实现过程进行说明。
需要说明的是，本发明所述的终端设备可以为UE、车辆等设备，本发明实施例并未对终端设备进行具体的限定。
本发明一实施例提供一种第一终端设备，如图5所示，该第一终端设备可以包括：发送单元11、接收单元12、确定单元13。
发送单元11，用于通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU；所述第一MAC PDU中携带有第一预留指示域，用于指示所述第一终端设备将所述第一资源块进行预留。
接收单元12，用于接收第二终端设备集合通过第二资源块发送的第二MAC PDU；所述第二终端设备集合中包含至少一个第二终端设备，所述第二MAC PDU中携带有第一资源反馈域，用于指示所述第一资源块被成功预留。
确定单元13，用于根据所述接收单元12接收到的所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域，确定所述发送单元11发送所述第一MAC PDU采用的所述第一资源块为发送新的MAC PDU采用的资源块。
所述发送单元11，还用于通过所述确定单元13确定的所述第一资源块发送所述新的MAC PDU。
在本发明实施例中，进一步的，所述接收单元12接收的所述第二MAC PDU中还携带有第二预留指示域，用于指示所述第二终端设备将所述第二资源块进行预留。
在本发明实施例中，进一步的，所述接收单元12接收到的所述第二MAC PDU中携带的所述第一资源反馈域用于指示所述第一资源块未被成功预留。
所述确定单元13，还用于根据接收单元12接收到的所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域和所述第二终端设备集合中的所有所述第二终端设备发送的所述第二预留指示域，从竞争资源池中确定新的资源块为发送所述新的MAC PDU采用的资源块。
所述发送单元11，还用于通过所述确定单元13确定的所述新的资源块发送所述新的MAC PDU。
在本发明实施例中，进一步的，如图6所示，该第一终端设备还可以包括：获取单元14、启动单元15。
获取单元14，用于在所述发送单元11通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU之前，获取配置信息，所述配置信息包括：预留指示信息。
所述确定单元13，还用于根据所述获取单元14获取到的所述预留指示信息确定定时器的定时时间；所述定时时间为所述第一终端设备将所述第一资源块进行预留的时间长度。
启动单元15，用于在所述发送单元11通过所述第一资源块发送所述第一MAC PDU时，启动所述定时器。
所述确定单元13，具体用于当所述启动单元15启动的所述定时器未停止计时时，根据所述接收单元12接收到的所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域，确定所述发送单元11发送所述第一MAC PDU采用的所述第一资源块为发送所述新的MAC PDU采用的资源块。
在本发明实施例中，进一步的，所述确定单元13，具体用于当 所述启动单元15启动的所述定时器停止计时时，根据所述接收单元12接收到的所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域和所述第二终端设备集合中的所有所述第二终端设备发送的所述第二预留指示域，从竞争资源池中确定新的资源块为发送所述新的MAC PDU采用的资源块。
在本发明实施例中，进一步的，如图6所示，该第一终端设备还可以包括：获取单元14、启动单元15。
获取单元14，用于在所述发送单元11通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU之前，获取配置信息，所述配置信息包括：预留指示信息。
所述确定单元13，还用于根据所述获取单元14获取到的所述预留指示信息确定定时器的定时时间；所述定时时间为所述第一终端设备将所述第一资源块进行预留的时间长度。
启动单元15，用于在所述发送单元11通过所述第一资源块发送所述第一MAC PDU时，启动所述定时器。
所述确定单元13，具体用于当所述启动单元15启动的所述定时器停止计时，或者所述启动单元15启动的所述定时器未停止计时时，根据所述接收单元12接收到的所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域和所述第二终端设备集合中的所有所述第二终端设备发送的所述第二预留指示域，从所述竞争资源池中确定所述新的资源块为发送所述新的MAC PDU采用的资源块。
在本发明实施例中，进一步的，所述获取单元14获取到的所述预留指示信息包括预留时长的指示信息，用于指示可预留的时长或时长范围。
所述确定单元13，具体用于当所述获取单元14获取到的所述预留时长的指示信息用于指示可预留的时长时，根据所述获取单元14获取到的所述预留时长的指示信息确定所述可预留的时长为所述定时器的定时时间；或者，当所述获取单元14获取到的所述预留时 长的指示信息用于指示可预留的时长范围时，根据所述获取单元14获取到的所述预留时长的指示信息确定所述可预留的时长范围内的任意一个时长为所述定时器的定时时间。
在本发明实施例中，进一步的，如图6所示，该第一终端设备还可以包括：获取单元14。
获取单元14，用于在所述发送单元11通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU之前，获取配置信息，所述配置信息包括：预留指示信息。
所述确定单元13，还用于根据所述获取单元14获取到的所述预留指示信息确定预留时长；所述预留时长为所述第一终端设备将所述第一资源块进行预留的时间长度。
所述发送单元11发送的第一MAC PDU中携带的所述第一预留指示域还用于指示时间参数，所述时间参数大于或等于0，所述时间参数用于表示所述预留时长。
所述确定单元13，具体用于当所述时间参数不为0时，根据所述接收单元12接收到的所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域，确定所述发送单元11发送所述第一MAC PDU采用的所述第一资源块为发送所述新的MAC PDU采用的资源块。
在本发明实施例中，进一步的，所述确定单元13，具体用于当所述时间参数为0时，根据所述接收单元12接收到的所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域和所述第二终端设备集合中的所有所述第二终端设备发送的所述第二预留指示域，从竞争资源池中确定新的资源块为发送所述新的MAC PDU采用的资源块。
在本发明实施例中，进一步的，如图6所示，该第一终端设备还可以包括：获取单元14。
获取单元14，用于在所述发送单元11通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU之前，获取配置信息，所 述配置信息包括：预留指示信息。
所述确定单元13，还用于根据所述获取单元14获取到的所述预留指示信息确定预留时长；所述预留时长为所述第一终端设备将所述第一资源块进行预留的时间长度。
所述发送单元11发送的第一MAC PDU中携带的所述第一预留指示域还用于指示时间参数，所述时间参数大于或等于0，所述时间参数用于表示所述预留时长。
所述确定单元13，具体用于当所述时间参数为0，或者所述时间参数不为0时，根据所述接收单元12接收到的所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域和所述第二终端设备集合中的所有所述第二终端设备发送的所述第二预留指示域，从所述竞争资源池中确定所述新的资源块为发送所述新的MAC PDU采用的资源块。
在本发明实施例中，进一步的，该第一终端设备还可以包括：配置单元16。
配置单元16，用于在所述发送单元11通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU之前，根据所述确定单元13确定的所述预留时长配置所述第一预留指示域。
在本发明实施例中，进一步的，所述获取单元14获取到的所述预留指示信息包括预留时长的指示信息，用于指示可预留的时长或时长范围，或者，所述获取单元14获取到的所述预留指示信息包括所述预留时长的指示信息和携带预留指示域的长度信息。
所述确定单元13，具体用于若所述获取单元14获取到的所述预留指示信息包括预留时长的指示信息，且所述预留时长的指示信息用于指示可预留的时长时，根据所述获取单元14获取到的所述预留时长的指示信息确定所述可预留的时长为所述预留时长；若所述获取单元14获取到的所述预留指示信息包括预留时长的指示信息，且所述预留时长的指示信息用于指示可预留的时长范围时，根据所述获取单元14获取到的所述预留时长的指示信息确定所述可预留 的时长范围内的任意一个时长为所述预留时长；若所述获取单元14获取到的所述预留指示信息包括预留时长的指示信息和携带预留指示域的长度信息，根据所述获取单元14获取到的所述预留时长的指示信息和携带预留指示域的长度信息确定所述预留时长。
在本发明实施例中，进一步的，该第一终端设备还可以包括：监听单元17。
监听单元17，用于在所述发送单元11通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU之前，监听竞争资源池。
所述确定单元13，还用于根据所述监听单元17监听到的所述竞争资源池中的资源块的预留情况确定第二资源反馈域；所述第二资源反馈域用于指示在发送所述第一MAC PDU前所述竞争资源池中资源块的预留情况。
所述发送单元11通过所述第一资源块发送的所述第一MAC PDU中还携带有所述第二资源反馈域。
在本发明实施例中，进一步的，所述获取单元14获取的所述配置信息中还包括：资源反馈信息。
所述确定单元13，具体用于根据所述获取单元14获取到的所述资源反馈信息和所述监听单元17监听到的所述竞争资源池中的资源块的预留情况生成所述第二资源反馈域。
在本发明实施例中，进一步的，所述获取单元14获取到的所述资源反馈信息包括：携带资源反馈域的条件信息和/或携带资源反馈域的长度信息。
所述确定单元13，具体用于当所述获取单元14获取到的所述资源反馈信息包括所述携带资源反馈域的条件信息时，在确定满足所述获取单元14获取到的所述携带资源反馈域的条件信息时，根据预设的携带资源反馈域的长度信息和所述监听单元17监听到的所述竞争资源池中的资源块的预留情况生成所述第二资源反馈域；当所述获取单元14获取到的所述资源反馈信息包括所述携带资源反馈域的长度信息时，根据所述获取单元14获取到的所述资源反馈信 息包括的携带资源反馈域的长度信息和所述监听单元17监听到的所述竞争资源池中的资源块的预留情况生成所述第二资源反馈域；当所述获取单元14获取到的所述资源反馈信息包括所述携带资源反馈域的条件信息和所述携带资源反馈域的长度信息时，在确定满足所述获取单元14获取到的所述携带资源反馈域的条件信息时，根据所述获取单元14获取到的所述资源反馈信息包括的携带资源反馈域的长度信息和所述监听单元17监听到的所述竞争资源池中的资源块的预留情况生成所述第二资源反馈域。
在本发明实施例中，进一步的，所述获取单元14，具体用于获取预先配置的所述配置信息，或者，接收网络设备发送的所述配置信息。
在本发明实施例中，进一步的，所述第一预留指示域包含在所述发送单元11发送的所述第一MAC PDU的MAC头中；所述MAC头中还包含延展指示域，用于指示所述第一MAC PDU是否携带所述第二资源反馈域，并当所述延展指示域指示所述第一MAC PDU携带所述第二资源反馈域时，所述第二资源反馈域包含在所述发送单元11发送的所述第一MAC PDU的MAC头中。
在本发明实施例中，进一步的，当所述发送单元11发送的所述第一MAC PDU携带所述第一预留指示域时，所述第一预留指示域包含在所述发送单元11发送的所述第一MAC PDU的有效载荷payload域中，且所述发送单元11发送的所述第一MAC PDU的MAC头中包含MAC子头，用于指示所述MAC子头对应的数据为所述第一预留指示域；或者，当所述发送单元11发送的所述第一MAC PDU携带所述第一预留指示域和所述第二资源反馈域时，所述第一预留指示域和所述第二资源反馈域包含在所述发送单元11发送的所述第一MAC PDU的payload域中，且所述发送单元11发送的所述第一MAC PDU的MAC头中包含MAC子头，用于指示所述MAC子头对应的数据为所述第一预留指示域和所述第二资源反馈域。
在本发明实施例中，进一步的，所述获取单元14获取到的所述 配置信息还包括：所述竞争资源池的信息。
所述第一终端设备还可以包括：选择单元18，用于在所述获取单元14获取配置信息之后，根据所述获取单元14获取到的所述竞争资源池的信息，从所述竞争资源池选择一资源块作为所述第一资源块。
本发明实施例提供的第一终端设备，通过第一资源块发送携带有用于指示将该第一资源块进行预留的第一预留指示域的第一MAC PDU，然后在接收到第二终端设备集合通过第二资源块发送的携带有用于指示第一资源块被成功预留第一资源反馈域的第二MAC PDU之后，根据该第二终端设备集合中的一个第二终端设备发送的第二MAC PDU携带的第一资源反馈域确定第一资源块为发送新的MAC PDU采用的资源块，并通过该第一资源块发送新的MAC PDU。第一终端设备通过第一预留指示域指示将第一资源块进行预留，并在根据接收到的其他终端设备发送的MAC PDU中携带的资源反馈域确定第一资源块被成功预留，即不存在资源碰撞时，继续使用该第一资源块进行新的MAC PDU的传输，并且，在根据接收到的其他终端设备发送的MAC PDU中携带的资源反馈域确定第一资源块未被成功预留，即存在资源碰撞时，重新选择新的资源块进行新的MAC PDU的传输，这样有效降低了传输资源的碰撞率，提升了传输效率。
并且，通过根据配置信息中的预留指示信息确定的第一终端设备可以将第一资源块进行预留的时间长度，对第一资源块进行预留，避免了一个终端设备一直使用某资源块的情况，实现了网络资源分配的公平性。
本发明另一实施例提供一种网络设备，如图7所示，包括：发送单元21。
发送单元21，用于向第一终端设备发送配置信息；所述配置信息包括预留指示信息。
在本发明实施例中，进一步的，所述发送单元21发送的所述预 留指示信息包括：预留时长的指示信息，用于指示可预留的时长或时长范围；或者，所述发送单元21发送的所述预留指示信息包括：所述预留时长的指示信息和携带预留指示域的长度信息。
在本发明实施例中，进一步的，所述发送单元21发送的所述配置信息还包括：资源反馈信息；所述资源反馈信息包括：携带资源反馈域的条件信息和/或携带资源反馈域的长度信息。
在本发明实施例中，进一步的，所述发送单元21，具体用于通过系统信息或无线资源控制RRC信令向所述第一终端设备发送所述配置信息。
在本发明实施例中，进一步的，所述发送单元21发送的所述配置信息还包括：竞争资源池的信息。
本发明实施例提供的网络设备，通过向第一终端设备发送包括预留指示信息的配置信息，使得第一终端设备可以根据由该预留指示信息确定的可以将第一资源块进行预留的时间长度，对第一资源块进行预留，避免了一个终端设备一直使用某资源块的情况，实现了网络资源分配的公平性。
本发明另一实施例提供一种数据传输方法，如图8所示，该方法可以包括：
301、第一终端设备通过第一资源块发送第一MAC PDU。
其中，第一MAC PDU中携带有第一预留指示域，用于指示第一终端设备将第一资源块进行预留。
具体的，当第一终端设备需要发送第一MAC PDU时，可以从竞争资源池包括的所有资源块中随机选择一块资源块作为第一资源块，然后通过该第一资源块将用于指示将该第一资源块进行预留的第一预留指示域携带在第一MAC PDU中向周围的终端设备进行广播。
302、第一终端设备接收第二终端设备集合通过第二资源块发送的第二MAC PDU。
其中，第二终端设备集合中包含至少一个第二终端设备，第二 MAC PDU中携带有第一资源反馈域，用于指示第一资源块被成功预留。
当然，该第一资源反馈域还可以用于指示竞争资源池中的除第一资源块外的其他资源块是否被成功预留。
303、第一终端设备根据第二终端设备集合中的一个第二终端设备发送的第一资源反馈域，确定第一资源块为发送新的MAC PDU采用的资源块。
304、第一终端设备通过第一资源块发送新的MAC PDU。
具体的，在第一终端设备通过第一资源块发送携带有第一预留指示域的第一MAC PDU之后，若第一终端设备接收到第二终端设备集合通过第二资源块发送的携带有用于指示第一资源块被成功预留的第一资源反馈域的第二MAC PDU，则第一终端设备可以根据接收到的第二终端设备集合中的一个第二终端设备发送的第二MAC PDU中携带的第一资源反馈域，确定第一资源块为发送新的MAC PDU采用的资源块，即第一终端设备可以根据接收到的第二MAC PDU中携带的第一资源反馈域确定第一资源块是否被成功预留，并在被成功预留时，继续使用该第一资源块用于后续的数据传输。
本发明实施例提供的数据传输方法，第一终端设备通过第一资源块发送携带有用于指示将该第一资源块进行预留的第一预留指示域的第一MAC PDU，然后在接收到第二终端设备集合通过第二资源块发送的携带有用于指示第一资源块被成功预留第一资源反馈域的第二MAC PDU之后，根据该第二终端设备集合中的一个第二终端设备发送的第二MAC PDU携带的第一资源反馈域确定第一资源块为发送新的MAC PDU采用的资源块，并通过该第一资源块发送新的MAC PDU。第一终端设备通过第一预留指示域指示将第一资源块进行预留，并在根据接收到的其他终端设备发送的MAC PDU中携带的资源反馈域确定第一资源块被成功预留，即不存在资源碰撞时，继续使用该第一资源块进行新的MAC PDU的传输，这样有效降低了传输资源的碰撞率，提升了传输效率。
进一步的，在步骤302中接收到的第二终端设备发送的第二MAC PDU中还携带有第二预留指示域，用于指示第二终端设备将第二资源块进行预留。
进一步的，步骤302中接收到的第二终端设备发送的第二MAC PDU中携带的第一资源反馈域用于指示第一资源块未被成功预留，此时，本发明实施例提供的数据传输方法还可以包括：第一终端设备根据第二终端设备集合中的一个第二终端设备发送的第一资源反馈域和第二终端设备集合中的所有第二终端设备发送的第二预留指示域，从竞争资源池中确定新的资源块为发送新的MAC PDU采用的资源块，并通过该新的资源块发送新的MAC PDU。
进一步的，为了网络资源分配的公平性，避免一个终端设备一直使用某资源块，在本发明实施例中，可以对第一终端设备预留第一资源块的时长进行限制，在第一种可能的实现方式中，在步骤301之前，该数据传输方法还可以包括：第一终端设备获取配置信息，配置信息包括：预留指示信息。
第一终端设备根据预留指示信息确定定时器的定时时间；定时时间为第一终端设备将第一资源块进行预留的时间长度，并在第一终端设备通过第一资源块发送第一MAC PDU时，第一终端设备启动所述定时器。
此时步骤303具体的可以为：当定时器未停止计时时，第一终端设备根据第二终端设备集合中的一个第二终端设备发送的第一资源反馈域，确定第一资源块为发送新的MAC PDU采用的资源块。
进一步的，在本发明实施例中，该数据传输方法还可以包括：当定时器停止计时时，第一终端设备根据第二终端设备集合中的一个第二终端设备发送的第一资源反馈域和第二终端设备集合中的所有第二终端设备发送的第二预留指示域，从竞争资源池中确定新的资源块为发送新的MAC PDU采用的资源块。
进一步的，所述的第一终端设备根据第二终端设备集合中的一个第二终端设备发送的第一资源反馈域和第二终端设备集合中的所 有第二终端设备发送的第二预留指示域，从竞争资源池中确定新的资源块为发送新的MAC PDU采用的资源块，具体的可以包括：当定时器停止计时，或者定时器未停止计时时，第一终端设备根据第二终端设备集合中的一个第二终端设备发送的第一资源反馈域和第二终端设备集合中的所有第二终端设备发送的第二预留指示域，从竞争资源池中确定新的资源块为发送新的MAC PDU采用的资源块。
进一步的，在步骤301之前，该数据传输方法还可以包括：第一终端设备将第一预留指示域配置为预设值。
进一步的，第一终端设备获取的配置信息中的预留指示信息包括预留时长的指示信息，用于指示可预留的时长或时长范围。
所述的第一终端设备根据预留指示信息确定定时器的定时时间，具体的可以包括：当预留时长的指示信息用于指示可预留的时长时，第一终端设备根据预留时长的指示信息确定可预留的时长为定时器的定时时间；或者，当预留时长的指示信息用于指示可预留的时长范围时，第一终端设备根据预留时长的指示信息确定可预留的时长范围内的任意一个时长为定时器的定时时间。
进一步的，为了网络资源分配的公平性，避免一个终端设备一直使用某资源块，在本发明实施例中，可以对第一终端设备预留第一资源块的时长进行限制，在第二种可能的实现方式中，在步骤301之前，该数据传输方法还可以包括：第一终端设备获取配置信息，配置信息包括：预留指示信息。
第一终端设备根据预留指示信息确定预留时长，预留时长为第一终端设备将第一资源块进行预留的时间长度。
第一预留指示域还用于指示时间参数，时间参数大于或等于0，时间参数用于表示预留时长。该时间参数随时间逐渐递减。
此时步骤303具体的可以为：当时间参数不为0时，第一终端设备根据第二终端设备集合中的一个第二终端设备发送的第一资源反馈域，确定第一资源块为发送新的MAC PDU采用的资源块。
进一步的，当时间参数为0时，第一终端设备根据第二终端设 备集合中的一个第二终端设备发送的第一资源反馈域和第二终端设备集合中的所有第二终端设备发送的第二预留指示域，从竞争资源池中确定新的资源块为发送新的MAC PDU采用的资源块。
进一步的，所述的第一终端设备根据第二终端设备集合中的一个第二终端设备发送的第一资源反馈域和第二终端设备集合中的所有第二终端设备发送的第二预留指示域，从竞争资源池中确定新的资源块为发送新的MAC PDU采用的资源块，具体的可以包括：当时间参数为0，或者时间参数不为0时，第一终端设备根据第二终端设备集合中的一个第二终端设备发送的第一资源反馈域和第二终端设备集合中的所有第二终端设备发送的第二预留指示域，从竞争资源池中确定新的资源块为发送新的MAC PDU采用的资源块。
可以理解的是，由于时间参数是随时间递减的，因此在第一终端设备发送的MAC PDU中携带的预留指示域也是随时间递减的。
进一步的，在步骤301之前，该数据传输方法还可以包括：第一终端设备根据预留时长配置第一预留指示域。
进一步的，预留指示信息包括预留时长的指示信息，用于指示可预留的时长或时长范围，或者，预留指示信息包括预留时长的指示信息和携带预留指示域的长度信息。
所述的第一终端设备根据预留指示信息确定预留时长，具体的可以包括：
若预留指示信息包括预留时长的指示信息，且预留时长的指示信息用于指示可预留的时长时，第一终端设备根据预留时长的指示信息确定可预留的时长为所述预留时长。或者，
若预留指示信息包括预留时长的指示信息，且预留时长的指示信息用于指示可预留的时长范围时，第一终端设备根据预留时长的指示信息确定可预留的时长范围内的任意一个时长为预留时长。或者，
若预留指示信息包括预留时长的指示信息和携带预留指示域的长度信息，第一终端设备根据预留时长的指示信息和携带预留指示 域的长度信息确定预留时长。
进一步的，为了便于第一终端设备周围的终端设备确定自身预留资源块是否成功，在步骤301之前，本发明实施例所述的资源传输方法还可以包括：第一终端设备监听竞争资源池，并根据监听到的竞争资源池中的资源块的预留情况确定第二资源反馈域；第二资源反馈域用于指示在发送第一MAC PDU前竞争资源池中资源块的预留情况。
第一终端设备通过第一资源块发送的第一MAC PDU中还携带有该第二资源反馈域。
进一步的，第一终端设备获取到的配置信息中还可以包括：资源反馈信息，这样，所述的根据监听到的竞争资源池中的资源块的预留情况确定第二资源反馈域，具体的可以包括：第一终端设备根据资源反馈信息和监听到的竞争资源池中的资源块的预留情况生成第二资源反馈域。
进一步的，资源反馈信息包括：携带资源反馈域的条件信息和/或携带资源反馈域的长度信息。
这样，所述的第一终端设备根据资源反馈信息和监听到的竞争资源池中的资源块的预留情况生成第二资源反馈域，具体的可以包括：
当资源反馈信息包括携带资源反馈域的条件信息时，在第一终端设备确定满足携带资源反馈域的条件信息时，根据预设的携带资源反馈域的长度信息和监听到的竞争资源池中的资源块的预留情况生成第二资源反馈域。或者，
当资源反馈信息包括携带资源反馈域的长度信息时，第一终端设备根据资源反馈信息包括的携带资源反馈域的长度信息和监听到的竞争资源池中的资源块的预留情况生成第二资源反馈域。或者，
当资源反馈信息包括携带资源反馈域的条件信息和携带资源反馈域的长度信息时，在第一终端设备确定满足携带资源反馈域的条件信息时，根据资源反馈信息包括的携带资源反馈域的长度信息和 监听到的竞争资源池中的资源块的预留情况生成第二资源反馈域。
进一步的，针对第一终端设备获取配置信息的具体方式，在一种可能的实现方式中，具体可以为：第一终端设备获取预先配置的配置信息；在另一种可能的实现方式中，具体可以为：第一终端设备接收网络设备发送的配置信息。
进一步的，第一终端设备接收网络设备发送的配置信息的具体实现方式可以为：第一终端设备接收网络设备通过系统信息或无线资源控制(英文：Radio Resource Control，简称：RRC)信令发送的配置信息。
示例性的，RRC信令具体的可以为：RRC连接重配置信息(RRC Connection Reconfiguration)。
进一步的，第一终端设备获取到的配置信息中还可以包括：竞争资源池的信息。
这样，在第一终端设备获取到配置信息之后，该数据传输方法还可以包括：第一终端设备根据竞争资源池的信息，从竞争资源池选择一资源块作为第一资源块。
进一步的，针对第一MAC PDU中携带第一预留指示域，或者携带第一预留指示域和第二资源反馈域的具体形式，在第一种可能的实现方式中，第一预留指示域包含在第一MAC PDU的MAC头中；MAC头中还包含延展指示域，用于指示第一MAC PDU是否携带第二资源反馈域，并当延展指示域指示第一MAC PDU携带第二资源反馈域时，第二资源反馈域包含在第一MAC PDU的MAC头中。
进一步的，针对第一MAC PDU中携带第一预留指示域，或者携带第一预留指示域和第二资源反馈域的具体形式，在第二种可能的实现方式中，当第一MAC PDU携带第一预留指示域时，第一预留指示域包含在第一MAC PDU的payload域中，且第一MAC PDU的MAC头中包含MAC子头，用于指示MAC子头对应的数据为第一预留指示域；或者，当第一MAC PDU携带第一预留指示域和第二资源反馈域时，第一预留指示域和第二资源反馈域包含在第一 MAC PDU的payload域中，且第一MAC PDU的MAC头中包含MAC子头，用于指示MAC子头对应的数据为第一预留指示域和第二资源反馈域。
本发明另一实施例提供一种数据传输方法，如图9所示，该数据传输方法可以包括：
401、网络设备向第一终端设备发送配置信息；所述配置信息包括预留指示信息。
本发明实施例提供的数据传输方法，网络设备通过向第一终端设备发送包括预留指示信息的配置信息，使得第一终端设备可以根据由该预留指示信息确定的可以将第一资源块进行预留的时间长度，对第一资源块进行预留，避免了一个终端设备一直使用某资源块的情况，实现了网络资源分配的公平性。
进一步的，所述的预留指示信息包括：预留时长的指示信息，用于指示可预留的时长或时长范围；或者，所述预留指示信息包括：所述预留时长的指示信息和携带预留指示域的长度信息。
进一步的，所述的配置信息还可以包括：资源反馈信息；所述的资源反馈信息可以包括：携带资源反馈域的条件信息和/或携带资源反馈域的长度信息。
进一步的，步骤401具体的可以为：网络设备通过系统信息或RRC信令向第一终端设备发送配置信息。
本发明另一实施例提供一种数据传输方法，以通过定时器设定第一终端设备预留第一资源块的预留时长为例，如图10所示，该方法可以包括：
501、第一终端设备获取配置信息。
其中，该配置信息可以包括：竞争资源池的信息，进一步的为了限定第一终端设备预留第一资源块的时长，该配置信息还可以包括预留指示信息，其中预留指示信息可以包括预留时长的指示信息，用于指示可预留的时长或时长范围，并且进一步的为了能够让其他终端设备可以确认自身的资源是否被成功预留，该配置信息还可以 包括资源反馈信息，资源反馈信息可以包括携带资源反馈域的条件信息和/或携带资源反馈域的长度信息，当资源反馈信息包括携带资源反馈域的条件信息时，可携带资源反馈域的长度可以预先配置在第一终端设备中，或者可以由第一终端设备根据实际应用场景的需求进行设置。
具体的，配置信息可以是预先配置在第一终端设备中的，也可以是第一终端设备从网络设备处获取到的，也就是说，第一终端设备可以通过以下方式中的任一种方式获取配置信息：
方式一：第一终端设备获取预先配置的配置信息。
方式二：第一终端设备接收网络设备发送的配置信息。
示例性的，网络设备可以通过系统信息或RRC信令将配置信息发送至第一终端设备，此时，第一终端设备便可以通过系统信息或RRC信令接收网络设备发送的配置信息。
在第一终端设备获取到配置信息之后，当第一终端设备需要发送数据时，便可以执行以下步骤502-步骤505：
502、第一终端设备根据竞争资源池的信息，从竞争资源池选择一资源块作为第一资源块。
其中，在第一终端设备获取到配置信息之后，当第一终端设备需要发送数据时，第一终端设备便可以根据配置信息中包括的竞争资源池信息，从竞争资源池中任意选取一资源块作为第一资源块。
其中，在D2D communication技术的D2D communication mode 2下，该竞争资源池信息可以包括SA资源池的信息和数据资源池的信息，该竞争资源池可以包括SA资源池和数据资源池。在D2D discovery技术的D2D discovery type 1下，该竞争资源池信息可以包括数据资源池的信息，该竞争资源池可以包括数据资源池。
示例性的，在D2D communication技术的D2D communication mode 2下，第一终端设备可以根据SA资源池的信息和数据资源池的信息，从SA资源池中任选一SA资源块，并从数据资源池中任选一数据资源块，也就是说，在该场景下，本发明实施例中的第一资 源块包括SA资源块和数据资源块。在D2D discovery技术的D2D discovery type 1下，第一终端设备可以根据数据资源池的信息，从数据资源池中任选一数据资源块，也就是说，在该场景下，本发明实施例中的第一资源块为数据资源块。
503、第一终端设备根据预留指示信息确定定时器的定时时间。
其中，定时器的定时时间为第一终端设备将第一资源块进行预留的时间长度。在第一终端设备获取到配置信息之后，可以根据配置信息中包括的预留指示信息确定定时器的定时时间，作为第一终端设备可以预留第一资源块的时间。
第一终端设备根据预留指示信息确定定时器的定时时间具体的可以为：
当预留时长的指示信息用于指示可预留的时长时，第一终端设备可以根据预留时长的指示信息确定该可预留的时长为定时器的定时时间。
或者，当预留时长的指示信息用于指示可预留的时长范围时，第一终端设备可以根据预留时长的指示信息确定该可预留的时长范围内的任意一个时长为定时器的定时时间。
504、第一终端设备将第一预留指示域配置为预设值。
其中，在第一终端设备需要将第一资源块进行预留时，可以将第一预留指示域配置为预设值，以指示期望将用于当前进行数据传输的资源块进行预留，即期望将第一资源块进行预留。
示例性的，当第一预留指示域的长度为1比特时，可以将“1”设定为预设值，也就是说，在第一终端设备需要将第一资源块进行预留时，可以将第一预留指示域配置为“1”，以指示期望将第一资源块进行预留。当然，若第一终端设备不需要将第一资源块进行预留，可以将第一预留指示域配置为“0”。
505、第一终端设备监听竞争资源池，并根据资源反馈信息和监听到的竞争资源池中资源块的预留情况生成第二资源反馈域。
其中，第一终端设备为了能够辅助周围的其他终端设备可以确 定自身预留的资源块是否被成功预留，在第一终端设备接收到的配置信息之后，可以对竞争资源池进行监听，并根据配置信息中包括的资源反馈信息和监听到的竞争资源池中资源块的预留情况，生成用于指示在发送第一MAC PDU前竞争资源池中资源块的预留情况的第二资源反馈域。其中，若第一终端设备在发送第一MAC PDU前，在竞争资源池中的某个资源块上成功接收到了数据，则第一终端设备认为该资源块被成功预留，若第一终端设备在发送第一MAC PDU前，在竞争资源池中的某个资源块上未成功接收到数据(其中，未成功接收到数据可以指在该资源块上未接收到数据，也可以指在该资源块上接收到数据但未成功解码)，则第一终端设备认为该资源块处于未被成功预留。
其中，资源反馈信息可以包括：携带资源反馈域的条件信息和/或携带资源反馈域的长度信息。此时，第一终端设备根据资源反馈信息和监听到的竞争资源池中的资源块的预留情况生成第二资源反馈域，具体的可以为：
当资源反馈信息包括携带资源反馈域的条件信息时，在第一终端设备确定满足携带资源反馈域的条件信息时，根据预设的携带资源反馈域的长度信息和监听到的竞争资源池中的资源块的预留情况生成第二资源反馈域。
或者，当资源反馈信息包括携带资源反馈域的长度信息时，第一终端设备根据资源反馈信息包括的携带资源反馈域的长度信息和监听到的竞争资源池中的资源块的预留情况生成第二资源反馈域。
或者，当资源反馈信息包括携带资源反馈域的条件信息和携带资源反馈域的长度信息时，在第一终端设备确定满足携带资源反馈域的条件信息时，根据资源反馈信息包括的携带资源反馈域的长度信息和监听到的竞争资源池中的资源块的预留情况生成第二资源反馈域。
其中，该携带资源反馈域的条件信息可以是一个概率值，第一终端设备可以根据该概率值确定是否满足携带资源反馈域的条件信 息。
示例性的，第二资源反馈域可以是位表(bitmap)的形式，每一个比特代表竞争资源池中的一个资源块，并可以用“0”表示该资源块未被成功预留，用“1”表示该资源块被成功预留。例如资源反馈信息包括携带资源反馈域的长度信息，且该携带资源反馈域的长度信息为3比特，那么第一终端设备在发送第一MAC PDU前，便可以根据对竞争资源池的监听情况，判断处于第一资源块的前3个资源块(或后3个资源块)的预留情况，并根据对应的资源块的预留情况和携带资源反馈域的长度信息生成第二资源反馈域，如在发送第一MAC PDU前，第一终端设备在处于第一资源块的前3个资源块中第一个资源块上未成功接收到数据，在第二个资源块上成功接收到数据，在第三个资源块上未成功接收到数据，此时第一终端设备可以确定出处于第一资源块的前3个资源块中第一个资源块未被成功预留，第二个资源块被成功预留，第三个资源块未被成功预留，那么，第一终端设备根据对应的资源块的预留情况和携带资源反馈域的长度信息生成的第二资源反馈域为010。
506、第一终端设备通过第一资源块发送第一MAC PDU，并启动定时器。
其中，在第一终端设备配置好第一预留指示域，生成了第二资源反馈域，并确定出定时器的定时时间之后，第一终端设备便可以通过第一资源块发送携带第一预留指示域、第二资源反馈域和需发送的数据的第一MAC PDU，并在发送第一MAC PDU时，启动定时器，以便定时器开始计时。
示例性的，在D2D communication技术的D2D communication mode 2下，第一资源块包括SA资源块和数据资源块，那么第一终端设备通过第一资源块发送第一MAC PDU，具体为：第一终端设备先通过所述的SA资源块广播SA信息，该SA信息用于指示所述的数据资源块在数据资源池中的时频资源位置以及调制编码方式，然后，通过所述的数据资源块，按照SA信息所指示的调制编码方式 广播第一MAC PDU，并启动定时器。
示例性的，在D2D discovery技术的D2D discovery type 1下，第一资源块为数据资源块，那么第一终端设备通过第一资源块发送第一MAC PDU，具体为：通过所述的数据资源块广播第一MAC PDU，并启动定时器。
其中，针对第一MAC PDU中携带第一预留指示域，或者携带第一预留指示域和第二资源反馈域的具体形式，在第一种可能的实现方式中，第一预留指示域包含在第一MAC PDU的MAC头中，MAC头中还包含延展指示域，用于指示第一MAC PDU是否携带第二资源反馈域，并当延展指示域指示第一MAC PDU携带第二资源反馈域时，第二资源反馈域包含在第一MAC PDU的MAC头中，第一MAC PDU的具体格式可以如图11和如图12所示。
在第二种可能的实现方式中，当第一MAC PDU携带第一预留指示域时，第一预留指示域包含在第一MAC PDU的payload域中，且第一MAC PDU的MAC头中包含MAC子头，用于指示MAC子头对应的数据为第一预留指示域，第一MAC PDU的具体格式可以如图13所示；或者，当第一MAC PDU携带第一预留指示域和第二资源反馈域时，第一预留指示域和第二资源反馈域包含在第一MAC PDU的payload域中，且第一MAC PDU的MAC头中包含MAC子头，用于指示MAC子头对应的数据为第一预留指示域和第二资源反馈域，第一MAC PDU的具体格式可以如图14所示。
需要说明的是，在本发明实施例中提供的如图11-14所示的第一MAC PDU的具体格式示意图中仅是说明该第一MAC PDU中可以包含的域，且对每个域的长度并不进行具体的限制，如图11-14所示的各域的长度只是一种示意，也就是说，本发明实施例在此对第一MAC PDU包含的域的种类，以及每个域的长度并不做具体限制，具体的，第一MAC PDU中包含的域的种类以及每个域的长度可以根据实际应用场景的需求进行设置。
507、第一终端设备接收第二终端设备集合通过第二资源块发送 的第二MAC PDU。
其中，第二终端设备集合中包含至少一个第二终端设备，第二MAC PDU中携带第二预留指示域和第一资源反馈域，第二预留指示域用于指示第二终端设备将第二资源块进行预留，第一资源反馈域用于指示第一资源块是否被成功预留。
在第一终端设备通过第一资源块发送携带有第一预留指示域、第二资源反馈域和需发送的数据的第一MAC PDU之后，若第一终端设备接收到第二终端设备集合通过第二资源块发送的携带有第二预留指示域和第一资源反馈域的第二MAC PDU，则当第一终端设备有新的MAC PDU需发送时，第一终端设备可以根据接收到的第二MAC PDU中携带的第二预留指示域、第一资源反馈域和定时器的计时时间确定发送新的MAC PDU采用的资源块，具体的可以包括以下步骤508-步骤510。
508、第一终端设备根据第二终端设备集合中的一个第二终端设备发送的第一资源反馈域判断第一资源块是否被成功预留，并判断定时器是否停止计时。
其中，在第一终端设备接收到第二终端设备集合通过第二资源块发送的携带有第二预留指示域和第一资源反馈域的第二MAC PDU之后，可以根据接收到的第二终端设备集合中的一个第二终端设备发送的第二MAC PDU中携带的第一资源反馈域判断第一资源块是否被成功预留，并判断定时器是否停止计时。
示例性的，在D2D communication技术的D2D communication mode 2下，第一资源块被成功预留，指的是SA资源块和数据资源块均被成功预留，第一资源块未被成功预留，指的是SA资源块和/或数据资源块未被成功预留。在D2D discovery技术的D2D discovery type 1下，第一资源块被成功预留，指的是数据资源块被成功预留，第一资源块未被成功预留，指的是数据资源块未被成功预留。
509、当第一资源块被成功预留，且定时器未停止计时时，第一终端设备确定第一资源块为发送新的MAC PDU采用的资源块，并 通过第一资源块发送新的MAC PDU。
其中，新的MAC PDU中携带的预留指示域为预设值，用于指示期望继续将第一资源块进行预留。
510、当第一资源块被成功预留，且定时器停止计时，或者，第一资源块未被成功预留，且定时器停止计时，或者，第一资源块未被成功预留，且定时器未停止计时，第一终端设备根据第二终端设备集合中的所有第二终端设备发送的第二预留指示域，从竞争资源池中确定新的资源块为发送新的MAC PDU采用的资源块，并通过新的资源块发送新的MAC PDU。
本发明实施例提供的数据传输方法，第一终端设备通过第一资源块发送携带有用于指示将该第一资源块进行预留的第一预留指示域的第一MAC PDU，然后在接收到第二终端设备集合通过第二资源块发送的携带有用于指示第一资源块被成功预留第一资源反馈域的第二MAC PDU之后，根据该第二终端设备集合中的一个第二终端设备发送的第二MAC PDU携带的第一资源反馈域确定第一资源块为发送新的MAC PDU采用的资源块，并通过该第一资源块发送新的MAC PDU。第一终端设备通过第一预留指示域指示将第一资源块进行预留，并在根据接收到的其他终端设备发送的MAC PDU中携带的资源反馈域确定第一资源块被成功预留，即不存在资源碰撞时，继续使用该第一资源块进行新的MAC PDU的传输，并且，在根据接收到的其他终端设备发送的MAC PDU中携带的资源反馈域确定第一资源块未被成功预留，即存在资源碰撞时，重新选择新的资源块进行新的MAC PDU的传输，这样有效降低了传输资源的碰撞率，提升了传输效率。
并且，通过根据配置信息中的预留指示信息确定的第一终端设备可以将第一资源块进行预留的时间长度，对第一资源块进行预留，避免了一个终端设备一直使用某资源块的情况，实现了网络资源分配的公平性。
本发明另一实施例提供一种数据传输方法，以通过时间参数设 定第一终端设备预留第一资源块的预留时长为例，如图15所示，该方法可以包括：
601、第一终端设备获取配置信息。
其中，该配置信息可以包括：竞争资源池的信息；进一步的为了限定第一终端设备预留第一资源块的时长，该配置信息还可以包括预留指示信息，其中预留指示信息可以包括预留时长的指示信息，用于指示可预留的时长或时长范围，或者，所述预留指示信息包括预留时长的指示信息和携带预留指示域的长度信息；并且进一步的为了能够让其他终端设备可以确认自身的资源是否被成功预留，该配置信息还可以包括资源反馈信息，资源反馈信息可以包括携带资源反馈域的条件信息和/或携带资源反馈域的长度信息，当资源反馈信息包括携带资源反馈域的条件信息时，可携带资源反馈域的长度可以预先配置在第一终端设备中，或者可以由第一终端设备根据实际应用场景的需求进行设置。
在第一终端设备获取到配置信息之后，当第一终端设备需要发送数据时，便可以执行以下步骤602-步骤605：
602、第一终端设备根据竞争资源池的信息，从竞争资源池选择一资源块作为第一资源块。
603、第一终端设备根据预留指示信息确定预留时长。
其中，预留时长为第一终端设备将第一资源块进行预留的时间长度。在第一终端设备获取到配置信息之后，可以根据配置信息中包括的预留指示信息确定预留时长，作为第一终端设备可以预留第一资源块的时间。
第一终端设备根据预留指示信息确定预留时长具体的可以为：
若预留指示信息包括预留时长的指示信息，且预留时长的指示信息用于指示可预留的时长时，第一终端设备根据预留时长的指示信息确定可预留的时长为预留时长。
或者，若预留指示信息包括预留时长的指示信息，且预留时长的指示信息用于指示可预留的时长范围时，第一终端设备根据预留 时长的指示信息确定可预留的时长范围内的任意一个时长为预留时长。
或者，若预留指示信息包括预留时长的指示信息和携带预留指示域的长度信息，第一终端设备根据预留时长的指示信息和携带预留指示域的长度信息确定预留时长。例如，当预留时长的指示信息用于指示可预留的时长范围时，假设，预留时长＝min[预留时长的指示信息，携带预留指示域的长度信息]，预留时长的指示信息为[0，20]，携带预留指示域的长度信息为3比特(bit)(最大可以表示8)，若第一终端设备最初在[0，20]之间确定了的预留时长是12，但由于携带预留指示域的长度信息为3bit，则最终确定出的预留时长便可以为8。
604、第一终端设备根据预留时长配置第一预留指示域。
其中，在第一终端设备需要将第一资源块进行预留时，可以根据确定出的预留时长配置第一预留指示域，以指示期望将用于当前进行数据传输的资源块进行预留，即期望将第一资源块进行预留，并指示时间参数，该时间参数大于或等于0，用于表示预留时长，即第一终端设备可以预留第一资源块的时间长度。
605、第一终端设备监听竞争资源池，并根据资源反馈信息和监听到的竞争资源池中资源块的预留情况生成第二资源反馈域。
606、第一终端设备通过第一资源块发送第一MAC PDU。
其中，在第一终端设备配置好第一预留指示域，并生成了第二资源反馈域之后，第一终端设备便可以通过第一资源块发送携带第一预留指示域、第二资源反馈域和需发送的数据的第一MAC PDU。并且，根据时间的前进，时间参数逐渐递减。
607、第一终端设备接收第二终端设备集合通过第二资源块发送的第二MAC PDU。
在第一终端设备通过第一资源块发送携带有第一预留指示域、第二资源反馈域和需发送的数据的第一MAC PDU之后，若第一终端设备接收到第二终端设备集合通过第二资源块发送的携带有第二 预留指示域和第一资源反馈域的第二MAC PDU，则当第一终端设备有新的MAC PDU需发送时，第一终端设备可以根据接收到的第二MAC PDU中携带的第二预留指示域、第一资源反馈域和随时间逐渐递减的时间参数确定发送新的MAC PDU采用的资源块，具体的可以包括以下步骤608-步骤610。
608、第一终端设备根据第二终端设备集合中的一个第二终端设备发送的第一资源反馈域判断第一资源块是否被成功预留，并判断时间参数是否为0。
其中，在第一终端设备接收到第二终端设备集合通过第二资源块发送的携带有第二预留指示域和第一资源反馈域的第二MAC PDU之后，可以根据接收到的第二终端设备集合中的一个第二终端设备发送的第二MAC PDU中携带的第一资源反馈域，判断第一资源块是否被成功预留，并判断时间参数是否为0。
609、当第一资源块被成功预留，且时间参数不为0时，第一终端设备确定第一资源块为发送新的MAC PDU采用的资源块，并通过第一资源块发送新的MAC PDU。
其中，新的MAC PDU中携带的预留指示域是根据当前的时间参数进行配置得到的，用于指示期望继续将第一资源块进行预留。
610、当第一资源块被成功预留，且时间参数为0，或者，第一资源块未被成功预留，且时间参数不为0，或者，第一资源块未被成功预留，且时间参数为0，第一终端设备根据第二终端设备集合中的所有第二终端设备发送的第二预留指示域，从竞争资源池中确定新的资源块为发送新的MAC PDU采用的资源块，并通过新的资源块发送新的MAC PDU。
需要说明的是，本发明实施例中步骤601-步骤610中的具体描述，可以参考本发明另一实施例中步骤501-步骤510中对应步骤的具体描述，本发明实施例在此不再详细赘述。
为了便于本领域技术人员理解本发明实施例提供的数据传输方法，本发明在此对以终端设备为车辆为例，对本发明的具体实施过 程进行举例说明。
例如，如图16所示，竞争资源池在时域上分成了7个资源块，编号分别为#1、#2、#3、#4、#5、#6、#7，且在一区域内存在四辆车，分别为车辆1、车辆2、车辆3和车辆4，均需要进行V2V信息的传输。
其中，车辆1和车辆2均通过随机选择的选择方法根据获取到的竞争资源池的信息，选择了#2号资源块用于数据的发送，并且，假设车辆1确定的预留时长为7，并车辆1根据预留时长配置的预留指示域为7，表明车辆1期望预留#2号资源块7个周期，车辆2确定的预留时长为9，并车辆2根据预留时长配置的预留指示域为9，表明车辆2期望预留#2号资源块9个周期。且在车辆1和车辆2分别配置好预留指示域后，便可以通过#2号资源块，将配置的预留指示域携带在MAC PDU中广播给周围的车辆。
处于在车辆1和车辆2周围的车辆，如车辆3，其通过随机选择的选择方法根据获取到的竞争资源池的信息，选择了#4号资源块用于数据的发送，并且假设没有其他车辆与车辆3竞争资源(因此其发送的数据可以被车辆1和车辆2成功接收到)，假设车辆3确定的预留时长为5，并车辆3根据预留时长配置的预留指示域为5，表明车辆3期望预留#4号资源块5个周期，且车辆3在发送MAC PDU之前，根据资源反馈信息生成了资源反馈域为000(假设携带资源反馈域的长度信息为3比特，这3比特由左向右分别表示在当前#4号资源块前面的三个资源块#1号资源块、#2号资源块、#3号资源块的预留情况，1表示被成功预留，0表示处于未被成功预留)，其中，由于#1号资源块和#3号资源块资源没有车辆发送信息，因此设置为0，而由于车辆1和车辆2的位置相邻且使用了相同的时频资源，即#2号资源块发送数据，因此，会造成传输资源碰撞，此时车辆3虽然能检测到#2号资源块上的能量但是不能成功接收到数据，因此将#2号资源块的预留情况也设置为0。且在车辆3配置好预留指示域和资源反馈域后，便可以通过#4号资源块，将配置的预留指 示域和资源反馈域携带在MAC PDU中广播给周围的车辆。
进而，车辆1和车辆2便可以成功接收到车辆3的MAC PDU，并根据接收到的车辆3的MAC PDU中携带的资源反馈域确定自身发送的MAC PDU未被周围车辆成功接收到，也就是说，确定#2号资源块未被成功预留，此时车辆1和车辆2可以分别根据车辆3的MAC PDU中携带的预留指示域，从竞争资源池中确定新的资源块用于发送新的MAC PDU，例如，车辆1根据车辆3的MAC PDU中携带的预留指示域，确定的新的资源块为#1号资源块。
并假设处于在车辆3周围的车辆，如车辆4通过一直接收周围车辆的MAC PDU，确定仅有#4号资源块被成功预留，于是车辆4通过根据获取到的竞争资源池的信息，选择了#7号资源块用于数据的发送，并且假设没有其他车辆与车辆4竞争资源(因此其发送的数据可以被车辆3成功接收到)，假设车辆4确定的预留时长为9，并车辆4根据预留时长配置的预留指示域为9，表明车辆4期望预留#7号资源块9个周期，且车辆4在发送MAC PDU之前，根据资源反馈信息生成了资源反馈域为100，由左向右分别表示在当前#7号资源块前面的三个资源块#4号资源块、#5号资源块、#6号资源块的预留情况，#4号资源块被成功预留。且在车辆4配置好预留指示域和资源反馈域后，便可以通过#7号资源块，将配置的预留指示域和资源反馈域携带在MAC PDU中广播给周围的车辆。
进而，车辆3成功接收到的车辆4的MAC PDU后，根据接收到的车辆4的MAC PDU中携带的资源反馈域确定自身发送的MAC PDU被周围车辆成功接收到，也就是说，确定#4号资源块被成功预留，这样，车辆3可以将#4号资源块确定为发送新的MAC PDU采用的资源块，直到预留时间超时或通过第三方确定出#4号资源块未被成功预留。
本发明实施例提供的数据传输方法，第一终端设备通过第一资源块发送携带有用于指示将该第一资源块进行预留的第一预留指示域的第一MAC PDU，然后在接收到第二终端设备集合通过第二资源 块发送的携带有用于指示第一资源块被成功预留第一资源反馈域的第二MAC PDU之后，根据该第二终端设备集合中的一个第二终端设备发送的第二MAC PDU携带的第一资源反馈域确定第一资源块为发送新的MAC PDU采用的资源块，并通过该第一资源块发送新的MAC PDU。第一终端设备通过第一预留指示域指示将第一资源块进行预留，并在根据接收到的其他终端设备发送的MAC PDU中携带的资源反馈域确定第一资源块被成功预留，即不存在资源碰撞时，继续使用该第一资源块进行新的MAC PDU的传输，并且，在根据接收到的其他终端设备发送的MAC PDU中携带的资源反馈域确定第一资源块未被成功预留，即存在资源碰撞时，重新选择新的资源块进行新的MAC PDU的传输，这样有效降低了传输资源的碰撞率，提升了传输效率。
并且，通过根据配置信息中的预留指示信息确定的第一终端设备可以将第一资源块进行预留的时间长度，对第一资源块进行预留，避免了一个终端设备一直使用某资源块的情况，实现了网络资源分配的公平性。
本发明另一实施例提供一种第一终端设备，如图17所示，包括：发送器71、接收器72、处理器73。
发送器71，用于通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU；所述第一MAC PDU中携带有第一预留指示域，用于指示所述第一终端设备将所述第一资源块进行预留。
接收器72，用于接收第二终端设备集合通过第二资源块发送的第二MAC PDU；所述第二终端设备集合中包含至少一个第二终端设备，所述第二MAC PDU中携带有第一资源反馈域，用于指示所述第一资源块被成功预留。
处理器73，用于根据所述接收器72接收到的所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域，确定所述发送器71发送所述第一MAC PDU采用的所述第一资源块为发送新的MAC PDU采用的资源块。
所述发送器71，还用于通过所述处理器73确定的所述第一资源块发送所述新的MAC PDU。
在本发明实施例中，进一步的，所述接收器72接收的所述第二MAC PDU中还携带有第二预留指示域，用于指示所述第二终端设备将所述第二资源块进行预留。
在本发明实施例中，进一步的，所述接收器72接收到的所述第二MAC PDU中携带的所述第一资源反馈域用于指示所述第一资源块未被成功预留。
所述处理器73，还用于根据接收器72接收到的所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域和所述第二终端设备集合中的所有所述第二终端设备发送的所述第二预留指示域，从竞争资源池中确定新的资源块为发送所述新的MAC PDU采用的资源块。
所述发送器71，还用于通过所述处理器73确定的所述新的资源块发送所述新的MAC PDU。
在本发明实施例中，进一步的，所述处理器73，还用于在所述发送器71通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU之前，获取配置信息，所述配置信息包括：预留指示信息。
所述处理器73，还用于根据所述处理器73获取到的所述预留指示信息确定定时器的定时时间；所述定时时间为所述第一终端设备将所述第一资源块进行预留的时间长度。
所述处理器73，还用于在所述发送器71通过所述第一资源块发送所述第一MAC PDU时，启动所述定时器。
所述处理器73，具体用于当所述处理器73启动的所述定时器未停止计时时，根据所述接收器72接收到的所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域，确定所述发送器71发送所述第一MAC PDU采用的所述第一资源块为发送所述新的MAC PDU采用的资源块。
在本发明实施例中，进一步的，所述处理器73，具体用于当所 述处理器73启动的所述定时器停止计时时，根据所述接收器72接收到的所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域和所述第二终端设备集合中的所有所述第二终端设备发送的所述第二预留指示域，从竞争资源池中确定新的资源块为发送所述新的MAC PDU采用的资源块。
在本发明实施例中，进一步的，所述处理器73，还用于在所述发送器71通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU之前，获取配置信息，所述配置信息包括：预留指示信息。
所述处理器73，还用于根据所述处理器73获取到的所述预留指示信息确定定时器的定时时间；所述定时时间为所述第一终端设备将所述第一资源块进行预留的时间长度。
所述处理器73，还用于在所述发送器71通过所述第一资源块发送所述第一MAC PDU时，启动所述定时器。
所述处理器73，具体用于当所述处理器73启动的所述定时器停止计时，或者所述处理器73启动的所述定时器未停止计时时，根据所述接收器72接收到的所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域和所述第二终端设备集合中的所有所述第二终端设备发送的所述第二预留指示域，从所述竞争资源池中确定所述新的资源块为发送所述新的MAC PDU采用的资源块。
在本发明实施例中，进一步的，所述处理器73获取到的所述预留指示信息包括预留时长的指示信息，用于指示可预留的时长或时长范围。
所述处理器73，具体用于当所述处理器73获取到的所述预留时长的指示信息用于指示可预留的时长时，根据所述处理器73获取到的所述预留时长的指示信息确定所述可预留的时长为所述定时器的定时时间；或者，当所述处理器73获取到的所述预留时长的指示信息用于指示可预留的时长范围时，根据所述处理器73获取到的所述预留时长的指示信息确定所述可预留的时长范围内的任意一个时 长为所述定时器的定时时间。
在本发明实施例中，进一步的，所述处理器73，还用于在所述发送器71通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU之前，获取配置信息，所述配置信息包括：预留指示信息。
所述处理器73，还用于根据所述处理器73获取到的所述预留指示信息确定预留时长；所述预留时长为所述第一终端设备将所述第一资源块进行预留的时间长度。
所述发送器71发送的第一MAC PDU中携带的所述第一预留指示域还用于指示时间参数，所述时间参数大于或等于0，所述时间参数用于表示所述预留时长。
所述处理器73，具体用于当所述时间参数不为0时，根据所述接收器72接收到的所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域，确定所述发送器71发送所述第一MAC PDU采用的所述第一资源块为发送所述新的MAC PDU采用的资源块。
在本发明实施例中，进一步的，所述处理器73，具体用于当所述时间参数为0时，根据所述接收器72接收到的所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域和所述第二终端设备集合中的所有所述第二终端设备发送的所述第二预留指示域，从竞争资源池中确定新的资源块为发送所述新的MAC PDU采用的资源块。
在本发明实施例中，进一步的，所述处理器73，还用于在所述发送器71通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU之前，获取配置信息，所述配置信息包括：预留指示信息。
所述处理器73，还用于根据所述处理器73获取到的所述预留指示信息确定预留时长；所述预留时长为所述第一终端设备将所述第一资源块进行预留的时间长度。
所述发送器71发送的第一MAC PDU中携带的所述第一预留指示域还用于指示时间参数，所述时间参数大于或等于0，所述时间 参数用于表示所述预留时长。
所述处理器73，具体用于当所述时间参数为0，或者所述时间参数不为0时，根据所述接收器72接收到的所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域和所述第二终端设备集合中的所有所述第二终端设备发送的所述第二预留指示域，从所述竞争资源池中确定所述新的资源块为发送所述新的MAC PDU采用的资源块。
在本发明实施例中，进一步的，所述处理器73，还用于在所述发送器71通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU之前，根据所述处理器73确定的所述预留时长配置所述第一预留指示域。
在本发明实施例中，进一步的，所述处理器73获取到的所述预留指示信息包括预留时长的指示信息，用于指示可预留的时长或时长范围，或者，所述处理器73获取到的所述预留指示信息包括所述预留时长的指示信息和携带预留指示域的长度信息。
所述处理器73，具体用于若所述处理器73获取到的所述预留指示信息包括预留时长的指示信息，且所述预留时长的指示信息用于指示可预留的时长时，根据所述处理器73获取到的所述预留时长的指示信息确定所述可预留的时长为所述预留时长；若所述处理器73获取到的所述预留指示信息包括预留时长的指示信息，且所述预留时长的指示信息用于指示可预留的时长范围时，根据所述处理器73获取到的所述预留时长的指示信息确定所述可预留的时长范围内的任意一个时长为所述预留时长；若所述处理器73获取到的所述预留指示信息包括预留时长的指示信息和携带预留指示域的长度信息，根据所述处理器73获取到的所述预留时长的指示信息和携带预留指示域的长度信息确定所述预留时长。
在本发明实施例中，进一步的，所述处理器73，还用于在所述发送器71通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU之前，监听竞争资源池。
所述处理器73，还用于根据所述处理器73监听到的所述竞争资源池中的资源块的预留情况确定第二资源反馈域；所述第二资源反馈域用于指示在发送所述第一MAC PDU前所述竞争资源池中资源块的预留情况。
所述发送器71通过所述第一资源块发送的所述第一MAC PDU中还携带有所述第二资源反馈域。
在本发明实施例中，进一步的，所述处理器73获取的所述配置信息中还包括：资源反馈信息。
所述处理器73，具体用于根据所述处理器73获取到的所述资源反馈信息和所述处理器73监听到的所述竞争资源池中的资源块的预留情况生成所述第二资源反馈域。
在本发明实施例中，进一步的，所述处理器73获取到的所述资源反馈信息包括：携带资源反馈域的条件信息和/或携带资源反馈域的长度信息。
所述处理器73，具体用于当所述处理器73获取到的所述资源反馈信息包括所述携带资源反馈域的条件信息时，在确定满足所述处理器73获取到的所述携带资源反馈域的条件信息时，根据预设的携带资源反馈域的长度信息和所述处理器73监听到的所述竞争资源池中的资源块的预留情况生成所述第二资源反馈域；当所述处理器73获取到的所述资源反馈信息包括所述携带资源反馈域的长度信息时，根据所述处理器73获取到的所述资源反馈信息包括的携带资源反馈域的长度信息和所述处理器73监听到的所述竞争资源池中的资源块的预留情况生成所述第二资源反馈域；当所述处理器73获取到的所述资源反馈信息包括所述携带资源反馈域的条件信息和所述携带资源反馈域的长度信息时，在确定满足所述处理器73获取到的所述携带资源反馈域的条件信息时，根据所述处理器73获取到的所述资源反馈信息包括的携带资源反馈域的长度信息和所述处理器73监听到的所述竞争资源池中的资源块的预留情况生成所述第二资源反馈域。
在本发明实施例中，进一步的，所述处理器73，具体用于获取预先配置的所述配置信息。
或者，所述接收器72，还用于接收网络设备发送的所述配置信息。
在本发明实施例中，进一步的，所述第一预留指示域包含在所述发送器71发送的所述第一MAC PDU的MAC头中；所述MAC头中还包含延展指示域，用于指示所述第一MAC PDU是否携带所述第二资源反馈域，并当所述延展指示域指示所述第一MAC PDU携带所述第二资源反馈域时，所述第二资源反馈域包含在所述发送器71发送的所述第一MAC PDU的MAC头中。
在本发明实施例中，进一步的，当所述发送器71发送的所述第一MAC PDU携带所述第一预留指示域时，所述第一预留指示域包含在所述发送器71发送的所述第一MAC PDU的有效载荷payload域中，且所述发送器71发送的所述第一MAC PDU的MAC头中包含MAC子头，用于指示所述MAC子头对应的数据为所述第一预留指示域；或者，当所述发送器71发送的所述第一MAC PDU携带所述第一预留指示域和所述第二资源反馈域时，所述第一预留指示域和所述第二资源反馈域包含在所述发送器71发送的所述第一MAC PDU的payload域中，且所述发送器71发送的所述第一MAC PDU的MAC头中包含MAC子头，用于指示所述MAC子头对应的数据为所述第一预留指示域和所述第二资源反馈域。
需要说明的是，本发明实施例提供的第一终端设备中各功能模块的具体工作过程可以参考方法实施例中对应过程的具体描述，本发明实施例在此不再详细赘述。
本发明实施例提供的第一终端设备，通过第一资源块发送携带有用于指示将该第一资源块进行预留的第一预留指示域的第一MAC PDU，然后在接收到第二终端设备集合通过第二资源块发送的携带有用于指示第一资源块被成功预留第一资源反馈域的第二MAC PDU之后，根据该第二终端设备集合中的一个第二终端设备发 送的第二MAC PDU携带的第一资源反馈域确定第一资源块为发送新的MAC PDU采用的资源块，并通过该第一资源块发送新的MAC PDU。第一终端设备通过第一预留指示域指示将第一资源块进行预留，并在根据接收到的其他终端设备发送的MAC PDU中携带的资源反馈域确定第一资源块被成功预留，即不存在资源碰撞时，继续使用该第一资源块进行新的MAC PDU的传输，并且，在根据接收到的其他终端设备发送的MAC PDU中携带的资源反馈域确定第一资源块未被成功预留，即存在资源碰撞时，重新选择新的资源块进行新的MAC PDU的传输，这样有效降低了传输资源的碰撞率，提升了传输效率。
并且，通过根据配置信息中的预留指示信息确定的第一终端设备可以将第一资源块进行预留的时间长度，对第一资源块进行预留，避免了一个终端设备一直使用某资源块的情况，实现了网络资源分配的公平性。
本发明另一实施例提供一种网络设备，如图18所示，该网络设备可以包括：发送器81。
发送器81，用于向第一终端设备发送配置信息；所述配置信息包括预留指示信息。
在本发明实施例中，进一步的，所述发送器81发送的所述预留指示信息包括：预留时长的指示信息，用于指示可预留的时长或时长范围。
或者，所述发送器81发送的所述预留指示信息包括：所述预留时长的指示信息和携带预留指示域的长度信息。
在本发明实施例中，进一步的，所述发送器81发送的所述配置信息还包括：资源反馈信息；所述资源反馈信息包括：携带资源反馈域的条件信息和/或携带资源反馈域的长度信息。
在本发明实施例中，进一步的，所述发送器81，具体用于通过系统信息或无线资源控制RRC信令向所述第一终端设备发送所述配置信息。
在本发明实施例中，进一步的，所述发送器81发送的所述配置信息还包括：竞争资源池的信息。
需要说明的是，本发明实施例提供的网络设备中各功能模块的具体工作过程可以参考方法实施例中对应过程的具体描述，本发明实施例在此不再详细赘述。
本发明实施例提供的网络设备，通过向第一终端设备发送包括预留指示信息的配置信息，使得第一终端设备可以根据由该预留指示信息确定的可以将第一资源块进行预留的时间长度，对第一资源块进行预留，避免了一个终端设备一直使用某资源块的情况，实现了网络资源分配的公平性。
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，为描述的方便和简洁，仅以上述各功能模块的划分进行举例说明，实际应用中，可以根据需要而将上述功能分配由不同的功能模块完成，即将装置的内部结构划分成不同的功能模块，以完成以上描述的全部或者部分功能。
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，所述模块或单元的划分，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装置，或一些特征可以忽略，或不执行。另一点，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，可以是电性，机械或其它的形式。
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一个物理单元或多个物理单元，即可以位于一个地方，或者也可以分布到多个不同地方。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。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个可读取存储介质中。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该软件产品存储在一个存储介质中，包括若干指令用以使得一个设备(可以是单片机，芯片等)或处理器(processor)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(英文：Read-Only Memory，简称：ROM)、随机存取存储器(英文：Random Access Memory，简称：RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应所述以权利要求的保护范围为准。

Claims (44)

  1. 一种第一终端设备，其特征在于，包括：
    发送单元，用于通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU；所述第一MAC PDU中携带有第一预留指示域，用于指示所述第一终端设备将所述第一资源块进行预留；
    接收单元，用于接收第二终端设备集合通过第二资源块发送的第二MAC PDU；所述第二终端设备集合中包含至少一个第二终端设备，所述第二MAC PDU中携带有第一资源反馈域，用于指示所述第一资源块被成功预留；
    确定单元，用于根据所述接收单元接收到的所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域，确定所述发送单元发送所述第一MAC PDU采用的所述第一资源块为发送新的MAC PDU采用的资源块；
    所述发送单元，还用于通过所述确定单元确定的所述第一资源块发送所述新的MAC PDU。
  2. 根据权利要求1所述的第一终端设备，其特征在于，
    所述接收单元接收的所述第二MAC PDU中还携带有第二预留指示域，用于指示所述第二终端设备将所述第二资源块进行预留。
  3. 根据权利要求2所述的第一终端设备，其特征在于，所述接收单元接收到的所述第二MAC PDU中携带的所述第一资源反馈域用于指示所述第一资源块未被成功预留，
    所述确定单元，还用于根据接收单元接收到的所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域和所述第二终端设备集合中的所有所述第二终端设备发送的所述第二预留指示域，从竞争资源池中确定新的资源块为发送所述新的MAC PDU采用的资源块；
    所述发送单元，还用于通过所述确定单元确定的所述新的资源块发送所述新的MAC PDU。
  4. 根据权利要求2所述的第一终端设备，其特征在于，还包括：
    获取单元，用于在所述发送单元通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU之前，获取配置信息，所述配置信息包括：预留指示信息；
    所述确定单元，还用于根据所述获取单元获取到的所述预留指示信息确定定时器的定时时间；所述定时时间为所述第一终端设备将所述第一资源块进行预留的时间长度；
    启动单元，用于在所述发送单元通过所述第一资源块发送所述第一MAC PDU时，启动所述定时器；
    所述确定单元，具体用于当所述启动单元启动的所述定时器未停止计时时，根据所述接收单元接收到的所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域，确定所述发送单元发送所述第一MAC PDU采用的所述第一资源块为发送所述新的MAC PDU采用的资源块。
  5. 根据权利要求4所述的第一终端设备，其特征在于，
    所述确定单元，具体用于当所述启动单元启动的所述定时器停止计时时，根据所述接收单元接收到的所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域和所述第二终端设备集合中的所有所述第二终端设备发送的所述第二预留指示域，从竞争资源池中确定新的资源块为发送所述新的MAC PDU采用的资源块。
  6. 根据权利要求3所述的第一终端设备，其特征在于，还包括：
    获取单元，用于在所述发送单元通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU之前，获取配置信息，所述配置信息包括：预留指示信息；
    所述确定单元，还用于根据所述获取单元获取到的所述预留指示信息确定定时器的定时时间；所述定时时间为所述第一终端设备将所述第一资源块进行预留的时间长度；
    启动单元，用于在所述发送单元通过所述第一资源块发送所述第一MAC PDU时，启动所述定时器；
    所述确定单元，具体用于当所述启动单元启动的所述定时器停止 计时，或者所述启动单元启动的所述定时器未停止计时时，根据所述接收单元接收到的所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域和所述第二终端设备集合中的所有所述第二终端设备发送的所述第二预留指示域，从所述竞争资源池中确定所述新的资源块为发送所述新的MAC PDU采用的资源块。
  7. 根据权利要求4-6中任一项所述的第一终端设备，其特征在于，所述获取单元获取到的所述预留指示信息包括预留时长的指示信息，用于指示可预留的时长或时长范围；
    所述确定单元，具体用于：
    当所述获取单元获取到的所述预留时长的指示信息用于指示可预留的时长时，根据所述获取单元获取到的所述预留时长的指示信息确定所述可预留的时长为所述定时器的定时时间；或者，
    当所述获取单元获取到的所述预留时长的指示信息用于指示可预留的时长范围时，根据所述获取单元获取到的所述预留时长的指示信息确定所述可预留的时长范围内的任意一个时长为所述定时器的定时时间。
  8. 根据权利要求2所述的第一终端设备，其特征在于，还包括：
    获取单元，用于在所述发送单元通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU之前，获取配置信息，所述配置信息包括：预留指示信息；
    所述确定单元，还用于根据所述获取单元获取到的所述预留指示信息确定预留时长；所述预留时长为所述第一终端设备将所述第一资源块进行预留的时间长度；
    所述发送单元发送的第一MAC PDU中携带的所述第一预留指示域还用于指示时间参数，所述时间参数大于或等于0，所述时间参数用于表示所述预留时长；
    所述确定单元，具体用于当所述时间参数不为0时，根据所述接收单元接收到的所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域，确定所述发送单元发送所述第一MAC  PDU采用的所述第一资源块为发送所述新的MAC PDU采用的资源块。
  9. 根据权利要求8所述的第一终端设备，其特征在于，
    所述确定单元，具体用于当所述时间参数为0时，根据所述接收单元接收到的所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域和所述第二终端设备集合中的所有所述第二终端设备发送的所述第二预留指示域，从竞争资源池中确定新的资源块为发送所述新的MAC PDU采用的资源块。
  10. 根据权利要求3所述的第一终端设备，其特征在于，还包括：
    获取单元，用于在所述发送单元通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU之前，获取配置信息，所述配置信息包括：预留指示信息；
    所述确定单元，还用于根据所述获取单元获取到的所述预留指示信息确定预留时长；所述预留时长为所述第一终端设备将所述第一资源块进行预留的时间长度；
    所述发送单元发送的第一MAC PDU中携带的所述第一预留指示域还用于指示时间参数，所述时间参数大于或等于0，所述时间参数用于表示所述预留时长；
    所述确定单元，具体用于当所述时间参数为0，或者所述时间参数不为0时，根据所述接收单元接收到的所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域和所述第二终端设备集合中的所有所述第二终端设备发送的所述第二预留指示域，从所述竞争资源池中确定所述新的资源块为发送所述新的MAC PDU采用的资源块。
  11. 根据权利要求8-10中任一项所述的第一终端设备，其特征在于，还包括：
    配置单元，用于在所述发送单元通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU之前，根据所述确定单元确定的所述预留时长配置所述第一预留指示域。
  12. 根据权利要求8-11中任一项所述的第一终端设备，其特征在于，所述获取单元获取到的所述预留指示信息包括预留时长的指示信息，用于指示可预留的时长或时长范围，或者，所述获取单元获取到的所述预留指示信息包括所述预留时长的指示信息和携带预留指示域的长度信息；
    所述确定单元，具体用于：
    若所述获取单元获取到的所述预留指示信息包括预留时长的指示信息，且所述预留时长的指示信息用于指示可预留的时长时，根据所述获取单元获取到的所述预留时长的指示信息确定所述可预留的时长为所述预留时长；
    若所述获取单元获取到的所述预留指示信息包括预留时长的指示信息，且所述预留时长的指示信息用于指示可预留的时长范围时，根据所述获取单元获取到的所述预留时长的指示信息确定所述可预留的时长范围内的任意一个时长为所述预留时长；
    若所述获取单元获取到的所述预留指示信息包括预留时长的指示信息和携带预留指示域的长度信息，根据所述获取单元获取到的所述预留时长的指示信息和携带预留指示域的长度信息确定所述预留时长。
  13. 根据权利要求4-12中任一项所述的第一终端设备，其特征在于，还包括：
    监听单元，用于在所述发送单元通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU之前，监听竞争资源池；
    所述确定单元，还用于根据所述监听单元监听到的所述竞争资源池中的资源块的预留情况确定第二资源反馈域；所述第二资源反馈域用于指示在发送所述第一MAC PDU前所述竞争资源池中资源块的预留情况；
    所述发送单元通过所述第一资源块发送的所述第一MAC PDU中还携带有所述第二资源反馈域。
  14. 根据权利要求13所述的第一终端设备，其特征在于，所述 获取单元获取的所述配置信息中还包括：资源反馈信息；
    所述确定单元，具体用于根据所述获取单元获取到的所述资源反馈信息和所述监听单元监听到的所述竞争资源池中的资源块的预留情况生成所述第二资源反馈域。
  15. 根据权利要求14所述的第一终端设备，其特征在于，所述获取单元获取到的所述资源反馈信息包括：携带资源反馈域的条件信息和/或携带资源反馈域的长度信息；
    所述确定单元，具体用于：
    当所述获取单元获取到的所述资源反馈信息包括所述携带资源反馈域的条件信息时，在确定满足所述获取单元获取到的所述携带资源反馈域的条件信息时，根据预设的携带资源反馈域的长度信息和所述监听单元监听到的所述竞争资源池中的资源块的预留情况生成所述第二资源反馈域；
    当所述获取单元获取到的所述资源反馈信息包括所述携带资源反馈域的长度信息时，根据所述获取单元获取到的所述资源反馈信息包括的携带资源反馈域的长度信息和所述监听单元监听到的所述竞争资源池中的资源块的预留情况生成所述第二资源反馈域；
    当所述获取单元获取到的所述资源反馈信息包括所述携带资源反馈域的条件信息和所述携带资源反馈域的长度信息时，在确定满足所述获取单元获取到的所述携带资源反馈域的条件信息时，根据所述获取单元获取到的所述资源反馈信息包括的携带资源反馈域的长度信息和所述监听单元监听到的所述竞争资源池中的资源块的预留情况生成所述第二资源反馈域。
  16. 根据权利要求4-15中任一项所述的第一终端设备，其特征在于，
    所述获取单元，具体用于获取预先配置的所述配置信息，或者，接收网络设备发送的所述配置信息。
  17. 根据权利要求1-16中任一项所述的第一终端设备，其特征在于，
    所述第一预留指示域包含在所述发送单元发送的所述第一MAC PDU的MAC头中；
    所述MAC头中还包含延展指示域，用于指示所述第一MAC PDU是否携带所述第二资源反馈域，并当所述延展指示域指示所述第一MAC PDU携带所述第二资源反馈域时，所述第二资源反馈域包含在所述发送单元发送的所述第一MAC PDU的MAC头中。
  18. 根据权利要求1-16中任一项所述的第一终端设备，其特征在于，
    当所述发送单元发送的所述第一MAC PDU携带所述第一预留指示域时，所述第一预留指示域包含在所述发送单元发送的所述第一MAC PDU的有效载荷payload域中，且所述发送单元发送的所述第一MAC PDU的MAC头中包含MAC子头，用于指示所述MAC子头对应的数据为所述第一预留指示域；
    或者，
    当所述发送单元发送的所述第一MAC PDU携带所述第一预留指示域和所述第二资源反馈域时，所述第一预留指示域和所述第二资源反馈域包含在所述发送单元发送的所述第一MAC PDU的payload域中，且所述发送单元发送的所述第一MAC PDU的MAC头中包含MAC子头，用于指示所述MAC子头对应的数据为所述第一预留指示域和所述第二资源反馈域。
  19. 一种网络设备，其特征在于，包括：
    发送单元，用于向第一终端设备发送配置信息；所述配置信息包括预留指示信息。
  20. 根据权利要求19所述网络设备，其特征在于，所述发送单元发送的所述预留指示信息包括：预留时长的指示信息，用于指示可预留的时长或时长范围；
    或者，所述发送单元发送的所述预留指示信息包括：所述预留时长的指示信息和携带预留指示域的长度信息。
  21. 根据权利要求19或20所述的网络设备，其特征在于，
    所述发送单元发送的所述配置信息还包括：资源反馈信息；所述资源反馈信息包括：携带资源反馈域的条件信息和/或携带资源反馈域的长度信息。
  22. 根据权利要求19-21中任一项所述的网络设备，其特征在于，
    所述发送单元，具体用于通过系统信息或无线资源控制RRC信令向所述第一终端设备发送所述配置信息。
  23. 一种数据传输方法，其特征在于，包括：
    第一终端设备通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU；所述第一MAC PDU中携带有第一预留指示域，用于指示所述第一终端设备将所述第一资源块进行预留；
    所述第一终端设备接收第二终端设备集合通过第二资源块发送的第二MAC PDU；所述第二终端设备集合中包含至少一个第二终端设备，所述第二MAC PDU中携带有第一资源反馈域，用于指示所述第一资源块被成功预留；
    所述第一终端设备根据所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域，确定所述第一资源块为发送新的MAC PDU采用的资源块；
    所述第一终端设备通过所述第一资源块发送所述新的MAC PDU。
  24. 根据权利要求23所述的方法，其特征在于，所述第二MAC PDU中还携带有第二预留指示域，用于指示所述第二终端设备将所述第二资源块进行预留。
  25. 根据权利要求24所述的方法，其特征在于，所述第一资源反馈域用于指示所述第一资源块未被成功预留，所述方法还包括：
    所述第一终端设备根据所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域和所述第二终端设备集合中的所有所述第二终端设备发送的所述第二预留指示域，从竞争资源池中确定新的资源块为发送所述新的MAC PDU采用的资源块；
    所述第一终端设备通过所述新的资源块发送所述新的MAC  PDU。
  26. 根据权利要求24所述的方法，其特征在于，在所述第一终端设备通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU之前，所述方法还包括：
    所述第一终端设备获取配置信息，所述配置信息包括：预留指示信息；
    所述第一终端设备根据所述预留指示信息确定定时器的定时时间；所述定时时间为所述第一终端设备将所述第一资源块进行预留的时间长度；
    在所述第一终端设备通过所述第一资源块发送所述第一MAC PDU时，所述第一终端设备启动所述定时器；
    所述第一终端设备根据所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域，确定所述第一资源块为发送新的MAC PDU采用的资源块，包括：
    当所述定时器未停止计时时，所述第一终端设备根据所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域，确定所述第一资源块为发送所述新的MAC PDU采用的资源块。
  27. 根据权利要求26所述的方法，其特征在于，所述方法还包括：
    当所述定时器停止计时时，所述第一终端设备根据所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域和所述第二终端设备集合中的所有所述第二终端设备发送的所述第二预留指示域，从竞争资源池中确定新的资源块为发送所述新的MAC PDU采用的资源块。
  28. 根据权利要求25所述的方法，其特征在于，在所述第一终端设备通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU之前，所述方法还包括：
    所述第一终端设备获取配置信息，所述配置信息包括：预留指示信息；
    所述第一终端设备根据所述预留指示信息确定定时器的定时时间；所述定时时间为所述第一终端设备将所述第一资源块进行预留的时间长度；
    在所述第一终端设备通过所述第一资源块发送所述第一MAC PDU时，所述第一终端设备启动所述定时器；
    所述第一终端设备根据所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域和所述第二终端设备集合中的所有所述第二终端设备发送的所述第二预留指示域，从竞争资源池中确定新的资源块为发送所述新的MAC PDU采用的资源块，包括：
    当所述定时器停止计时，或者所述定时器未停止计时时，所述第一终端设备根据所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域和所述第二终端设备集合中的所有所述第二终端设备发送的所述第二预留指示域，从所述竞争资源池中确定所述新的资源块为发送所述新的MAC PDU采用的资源块。
  29. 根据权利要求26-28中任一项所述的方法，其特征在于，所述预留指示信息包括预留时长的指示信息，用于指示可预留的时长或时长范围；
    所述第一终端设备根据所述预留指示信息确定定时器的定时时间，包括：
    当所述预留时长的指示信息用于指示可预留的时长时，所述第一终端设备根据所述预留时长的指示信息确定所述可预留的时长为所述定时器的定时时间；或者，
    当所述预留时长的指示信息用于指示可预留的时长范围时，所述第一终端设备根据所述预留时长的指示信息确定所述可预留的时长范围内的任意一个时长为所述定时器的定时时间。
  30. 根据权利要求24所述的方法，其特征在于，在所述第一终端设备通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU之前，所述方法还包括：
    所述第一终端设备获取配置信息，所述配置信息包括：预留指示 信息；
    所述第一终端设备根据所述预留指示信息确定预留时长，所述预留时长为所述第一终端设备将所述第一资源块进行预留的时间长度；
    所述第一预留指示域还用于指示时间参数，所述时间参数大于或等于0，所述时间参数用于表示所述预留时长；
    所述第一终端设备根据所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域，确定所述第一资源块为发送新的MAC PDU采用的资源块，包括：
    当所述时间参数不为0时，所述第一终端设备根据所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域，确定所述第一资源块为发送所述新的MAC PDU采用的资源块。
  31. 根据权利要求30所述的方法，其特征在于，所述方法还包括：
    当所述时间参数为0时，所述第一终端设备根据所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域和所述第二终端设备集合中的所有所述第二终端设备发送的所述第二预留指示域，从竞争资源池中确定新的资源块为发送所述新的MAC PDU采用的资源块。
  32. 根据权利要求25所述的方法，其特征在于，在所述第一终端设备通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU之前，所述方法还包括：
    所述第一终端设备获取配置信息，所述配置信息包括：预留指示信息；
    所述第一终端设备根据所述预留指示信息确定预留时长，所述预留时长为所述第一终端设备将所述第一资源块进行预留的时间长度；
    所述第一预留指示域还用于指示时间参数，所述时间参数大于或等于0，所述时间参数用于表示所述预留时长；
    所述第一终端设备根据所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域和所述第二终端设备集合中 的所有所述第二终端设备发送的所述第二预留指示域，从竞争资源池中确定新的资源块为发送所述新的MAC PDU采用的资源块，包括：
    当所述时间参数为0，或者所述时间参数不为0时，所述第一终端设备根据所述第二终端设备集合中的一个所述第二终端设备发送的所述第一资源反馈域和所述第二终端设备集合中的所有所述第二终端设备发送的所述第二预留指示域，从所述竞争资源池中确定所述新的资源块为发送所述新的MAC PDU采用的资源块。
  33. 根据权利要求30-32中任一项所述的方法，其特征在于，在所述第一终端设备通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU之前，还包括：
    所述第一终端设备根据所述预留时长配置所述第一预留指示域。
  34. 根据权利要求30-33中任一项所述的方法，其特征在于，所述预留指示信息包括预留时长的指示信息，用于指示可预留的时长或时长范围，或者，所述预留指示信息包括所述预留时长的指示信息和携带预留指示域的长度信息；
    所述第一终端设备根据所述预留指示信息确定预留时长，包括：
    若所述预留指示信息包括预留时长的指示信息，且所述预留时长的指示信息用于指示可预留的时长时，所述第一终端设备根据所述预留时长的指示信息确定所述可预留的时长为所述预留时长；
    若所述预留指示信息包括预留时长的指示信息，且所述预留时长的指示信息用于指示可预留的时长范围时，所述第一终端设备根据所述预留时长的指示信息确定所述可预留的时长范围内的任意一个时长为所述预留时长；
    若所述预留指示信息包括预留时长的指示信息和携带预留指示域的长度信息，所述第一终端设备根据所述预留时长的指示信息和携带预留指示域的长度信息确定所述预留时长。
  35. 根据权利要求26-34中任一项所述的方法，其特征在于，在所述第一终端设备通过第一资源块发送第一媒体接入控制MAC协议数据单元PDU之前，所述方法还包括：
    所述第一终端设备监听竞争资源池，并根据监听到的所述竞争资源池中的资源块的预留情况确定第二资源反馈域；所述第二资源反馈域用于指示在发送所述第一MAC PDU前所述竞争资源池中资源块的预留情况；
    所述第一终端设备通过所述第一资源块发送的所述第一MAC PDU中还携带有所述第二资源反馈域。
  36. 根据权利要求35所述的方法，其特征在于，所述配置信息中还包括：资源反馈信息；
    所述根据监听到的所述竞争资源池中的资源块的预留情况确定第二资源反馈域，包括：
    所述第一终端设备根据所述资源反馈信息和监听到的所述竞争资源池中的资源块的预留情况生成所述第二资源反馈域。
  37. 根据权利要求36所述的方法，其特征在于，所述资源反馈信息包括：携带资源反馈域的条件信息和/或携带资源反馈域的长度信息；
    所述第一终端设备根据所述资源反馈信息和监听到的所述竞争资源池中的资源块的预留情况生成所述第二资源反馈域，包括：
    当所述资源反馈信息包括所述携带资源反馈域的条件信息时，在所述第一终端设备确定满足所述携带资源反馈域的条件信息时，根据预设的携带资源反馈域的长度信息和监听到的所述竞争资源池中的资源块的预留情况生成所述第二资源反馈域；
    当所述资源反馈信息包括所述携带资源反馈域的长度信息时，所述第一终端设备根据所述资源反馈信息包括的携带资源反馈域的长度信息和监听到的所述竞争资源池中的资源块的预留情况生成所述第二资源反馈域；
    当所述资源反馈信息包括所述携带资源反馈域的条件信息和所述携带资源反馈域的长度信息时，在所述第一终端设备确定满足所述携带资源反馈域的条件信息时，根据所述资源反馈信息包括的携带资源反馈域的长度信息和监听到的所述竞争资源池中的资源块的预留 情况生成所述第二资源反馈域。
  38. 根据权利要求26-37中任一项所述的方法，其特征在于，所述第一终端设备获取配置信息，包括：
    所述第一终端设备获取预先配置的所述配置信息；
    或者，
    所述第一终端设备接收网络设备发送的所述配置信息。
  39. 根据权利要求23-38中任一项所述的方法，其特征在于，
    所述第一预留指示域包含在所述第一MAC PDU的MAC头中；
    所述MAC头中还包含延展指示域，用于指示所述第一MAC PDU是否携带所述第二资源反馈域，并当所述延展指示域指示所述第一MAC PDU携带所述第二资源反馈域时，所述第二资源反馈域包含在所述第一MAC PDU的MAC头中。
  40. 根据权利要求23-38中任一项所述的方法，其特征在于，
    当所述第一MAC PDU携带所述第一预留指示域时，所述第一预留指示域包含在所述第一MAC PDU的有效载荷payload域中，且所述第一MAC PDU的MAC头中包含MAC子头，用于指示所述MAC子头对应的数据为所述第一预留指示域；
    或者，
    当所述第一MAC PDU携带所述第一预留指示域和所述第二资源反馈域时，所述第一预留指示域和所述第二资源反馈域包含在所述第一MAC PDU的payload域中，且所述第一MAC PDU的MAC头中包含MAC子头，用于指示所述MAC子头对应的数据为所述第一预留指示域和所述第二资源反馈域。
  41. 一种数据传输方法，其特征在于，包括：
    网络设备向第一终端设备发送配置信息；所述配置信息包括预留指示信息。
  42. 根据权利要求41所述方法，其特征在于，
    所述预留指示信息包括：预留时长的指示信息，用于指示可预留的时长或时长范围；
    或者，所述预留指示信息包括：所述预留时长的指示信息和携带预留指示域的长度信息。
  43. 根据权利要求41或42所述的方法，其特征在于，
    所述配置信息还包括：资源反馈信息；所述资源反馈信息包括：携带资源反馈域的条件信息和/或携带资源反馈域的长度信息。
  44. 根据权利要求41-43中任一项所述的方法，其特征在于，所述网络设备向第一终端设备发送配置信息，包括：
    所述网络设备通过系统信息或无线资源控制RRC信令向所述第一终端设备发送所述配置信息。
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