RU2495531C2 - Methods, systems and apparatus for obtaining interpretation and acknowledgement of data reception status - Google Patents

Abstract

FIELD: information technology.

SUBSTANCE: method includes steps of: receiving data in which a short bit array is inserted; obtaining an interpretation parameter for interpreting the short bit array, where the value of the interpretation parameter is less than the maximum countdown value; and interpreting the short bit array in accordance with the interpretation parameter to obtain the reception status of the transmitted data. The reported bit array (RB) in a combined acknowledgement/negative acknowledgement (PAN) is interpreted based on a interpretation parameter the value of which is less than BSCV-MAX. Since the value of the interpretation parameter is less than BSCV-MAX and closer to the round-trip time (RTT), RTT can be estimated more accurately and, additionally, real zeroes and unreal zeroes in the RB can be determined more accurately, which enables to reduce data transmission delay.

EFFECT: high data transmission rate.

14 cl, 8 dwg

Description

FIELD OF THE INVENTION

The present invention relates to the field of communication technology, and, in particular, to methods, systems and devices for receiving, interpreting and confirming the status of data reception.

BACKGROUND OF THE INVENTION

In the global system for mobile communications (GSM) / radio communication networks with subscribers (GERAN) of the developed GSM standard with an increased data rate (EDGE), in order to optimize data transfer in packet switching mode, the transmission of radio channel control (RLC) data blocks is controlled by an automatic a retransmission request (ARQ) in the RLC confirmation / non-acknowledgment / non-constant transmission mode, and the network, as the receiving end of the data, actively reports the corresponding uplink conditions and information about successful inyatyh RLC data blocks to the mobile terminal, or as a data transmitting end, requests the mobile terminal to report the relevant conditions of the downlink and information on successfully received RLC data blocks.

In the transmission window of the data-transmitting end, the RLC data blocks are presented in a state of waiting for acknowledgment of receipt (expectation of acknowledgment), a state of correct reception (preliminary acknowledgment of receipt) or a state of incorrect reception (NACK). If an RLC data block is transmitted, this block is identified as a preliminary acknowledgment. After receiving the “ACK / NACK” message of the packet, the data transmitting end knows whether the previously transmitted RLC data block is correctly received and accordingly updates the transmission window. If the data block is received correctly, the data block is identified as a preliminary acknowledgment of receipt in the transmission window, and if the data block is received incorrectly or lost, the data block is identified as NACK in the transmission window, and the data transmitting end can retransmit the data block. When the previously transmitted RLC data block is received correctly, and after the reception information is notified to the data transmitting end, the transmitting end updates the transmission window and the transmission window shifts to the position of the previously incorrectly received RLC data block.

In the receive window of the data receiving end, RLC data blocks are presented as advance acknowledgment (ACK) or no acknowledgment (NACK). If all the RLC data blocks in the receive window are pleasantly correct, then the receive window is updated back to update the left initial side of the receive window to the position of the previously incorrectly received RLC data block, where the sequence number of the earlier incorrectly received (BSN) data block is V (Q), and the sequence number of the next data block to be received in the receive window is V (R).

Whether the network is actively reporting the "ACK / NACK" packet message to the mobile terminal or if the network terminal of the mobile terminal sends the "ACK / NACK" packet message, the ARQ mechanism for uplink and downlink data transfer takes a periodic approach. Therefore, the feedback is not timely, and incorrectly received RLC data blocks cannot be reported directly to the transmitting end and retransmitted directly, causing a longer delay time, especially for real-time services.

In order to quickly identify the error of the reception of the RLC data block, the mechanism of fast "ACK / NACK" confirmation is introduced, that is, the combined ACK / NACK (PAN) of the short bit array is inserted into the RLC / MAC data block by puncturing in order to quickly inform the transmitter end of an incorrectly received data block. To confirm the downlink data when an error is detected, the terminal enters the PAN into the RLC / MAC data block transmitted on the uplink to report the reception error information, while the transmission data is unnecessarily awaiting a request by the network. Of course, the terminal can also report PAN in case of a request by the network. To confirm the uplink data block when a reception error is detected, the network enters the PAN into the downlink RLC / MAC data block to notify the terminal of a data reception error during data delivery, so that the error can be returned to the terminal, unnecessarily waiting period messages.

A PAN sequentially includes: a short initial sequence number (Short SSN), a window start identity (BOW), a reported bitmap (RB), and a temporary action identity (TFI).

. После этого, конец передачи принимает PAN, причем если в RB значение бита является единицей, то состояние соответствующего блока RLC в окне передачи меняется на предварительный ACK; если в RB значение бита является нулем, то состояние соответствующего блока RLC в окне передачи меняется на NACK; и если блок RLC повторно передается, состояние блока RLC меняется на ожидание ACK.The network polls the terminal to indicate to the terminal the data stream whose reception should be notified. When the terminal reports the PAN with respect to the data stream indicated by the network, the message always starts from the beginning of the receive window, that is, the signal travels in both directions, the signal travels in both directions $$\text{Short ssn}=\text{V (q)}+\text{one}$$

. After that, the end of the transmission receives a PAN, and if in RB the bit value is one, then the state of the corresponding RLC block in the transmission window changes to a preliminary ACK; if in RB the bit value is zero, then the state of the corresponding RLC block in the transmission window changes to NACK; and if the RLC block is retransmitted, the state of the RLC block changes to waiting for the ACK.

However, since the PAN RB length is fixed when the receiving end reports the PAN, and when the number of RLC blocks reported is not enough to fill the RB completely, the blank part at the end of the RB is filled with zeros, where the zeros at the end do not indicate a reception error, but indicate that these blocks are either not transferred or are in the process of being transmitted. Thus, after receiving the PAN reported by the receiving end, the data transmitting end needs to distinguish which zeros are valid in RB, that is, which RLC blocks are incorrectly received and which zeros are incorrect, that is, which RLC blocks are not transmitted or are in the process of transmission .

In the prior art, a method of assisting a transmitting end in a PAN interpretation is to indicate an RB interpretation parameter in the network system information, such as a maximum countdown value (BS_CV-MAX). This parameter depends on the specific conditions and reflects the signal travel time in both directions (RTT) of two types of confirmations: sample confirmation and fast confirmation. The RTT used by the sample acknowledgment is long and the quick acknowledgment RTT is short. Zeros in RB correspond to the intervals between the time when the RLC blocks are transmitted and the time when the end of the transmission receives the PAN. RTT is counted by radio unit periods. If the RTT is less than the periods of the BSCV-MAX-1 radio block, the corresponding zeros in the RB are invalid; and if the RTT is greater than the periods of the radio block BS_CV-MAX-1, the corresponding zeros in the RB are valid. The radio block period is 10 milliseconds (reduced transmission time interval block (RTTI)) or 20 milliseconds (basic transmission time interval block (BTTI)).

в PAN, это означает, что PAN включает в себя начало окна приема. При выполнении интерпретации, передающий конец меняет состояния SSN-2 (а именно, $$\text{V (Q) - 1}$$

) и все предыдущие блоки данных RLC в окне передачи на предварительные ACK.Another way is to fill in the remaining space in RB units. When the end of the data reception creates a PAN, for the returned RLC blocks, if the reception is incorrect, the corresponding positions in the RB are filled with zeros; if the reception is correct, the corresponding positions in the RB are filled with units; and if the number of returned RLC blocks is not enough to fill all the places in the RB, all remaining places are filled with units. After the data-transmitting end receives the PAN, if the bit values in RB are units, the state of the RLC blocks corresponding to these bits in the transmission window does not change, that is, if the ACK wait state is initially, that is, the ACK is still expected; and if the bit values in RB are zeros, the RLC blocks corresponding to these bits are set to NACK because the delay can be reduced only if the wrong blocks are retransmitted in time. After the NACK blocks are retransmitted, the state of the corresponding blocks changes to the pending ACK. If $$\text{Bow}=\text{one}$$

in PAN, this means that the PAN includes the beginning of the receive window. When interpreting, the transmitting end changes the state of SSN-2 (namely, $$\text{V (Q) - 1}$$

) and all previous RLC data blocks in the transfer window to the preliminary ACKs.

In carrying out the present invention, the inventor has discovered in the prior art there are at least the following disadvantages. The first method increases the transmission delay, and the second method reduces the bandwidth.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide methods, systems, and devices for receiving, interpreting, and confirming a data reception state.

An embodiment of the present invention provides a method for obtaining a data reception state, the method including the steps of:

receive data in which a short bitmap is inserted;

obtaining an interpretation parameter for interpreting a short bitmap in which the value of the interpretation parameter is less than the maximum countdown value; and

interpret the short bitmap in accordance with the interpretation parameter to obtain the receive status of the transmitted data.

An embodiment of the present invention also provides a method for interpreting a data reception state, the method including the steps of:

transmitting a predetermined interpretation parameter for interpreting the short bitmap to the device, so that the device interprets, in accordance with this interpretation parameter, the short bitmap in the received data into which the short bitmap is inserted, the value of the interpretation parameter being less than the maximum countdown value .

An embodiment of the present invention also provides a communication device, including:

a first receiving module configured to receive data into which a short bitmap is inserted;

a receiving module configured to receive an interpretation parameter for interpreting a short bitmap, in which the value of the interpretation parameter is less than the maximum countdown value; and

a first interpretation module configured to interpret the short bitmap, in accordance with the interpretation parameter, to obtain a reception state of the transmitted data.

An embodiment of the present invention also provides a communication device, including:

the first transmission module, configured to transmit a predetermined interpretation parameter for interpreting the short bitmap to the device, so that the device interprets, in accordance with the interpretation parameter, the short bitmap in the received data in which the short bitmap is inserted, and the value of the interpretation parameter is less than the maximum countdown value.

An embodiment of the present invention also provides a communication system including a first device and a second device.

In the previous embodiment, the RB in the PAN is interpreted by an interpretation parameter whose value is less than BS_CV-MAX. Since the value of the interpretation parameter is less than BS_CV-MAX and close to time (RTT), RTT can be estimated more accurately, and in addition, real zeros and invalid zeros in RB can be separated more accurately, which reduces the transmission delay.

An embodiment of the present invention also provides a method for confirming a data reception state, in which the method includes the steps of:

inserting the short bitmap required for polling in the data to be transmitted, the short bitmap including an indicator of whether the received window is zero, so that the data receiving device interprets the short bitmap in accordance with the indicator to obtain a state receiving transmitted device data; and

transmit data.

An embodiment of the present invention also provides a method for obtaining a data reception state, the method including the steps of:

receiving data including a short bitmap, the short bitmap including an indicator of whether the received window is zero; and

interpret the short bitmap, in accordance with the indicator, to obtain the reception status of the transmitted data.

An embodiment of the present invention also provides a third device, including:

an insertion module configured to insert a short bitmap required for polling in the transmitted data, the short bitmap including an indicator of whether the received window is zero, so that the device receiving data interprets the short bitmap, in accordance with indicator to get the reception status of the transmitted device data; and

a transmission module configured to transmit data.

An embodiment of the present invention also provides a fourth device, including:

a second receiving module configured to receive data including a short bit array, the short bit array including an indicator of whether the received window is zero; and

the second interpretation module, configured to interpret the short bitmap, in accordance with the indicator, to obtain the reception status of the transmitted data.

An embodiment of the present invention also provides a communication system including a third device and a fourth device.

In the previous embodiment, by the indicator of whether the reception window is zero, the data receiving end can find out, in accordance with the indicator, whether the reception window of the terminal receiving data transmitted from the data receiving end is zero, thus correctly distinguishing whether the transmitted the data is in the wrong reception state or is still in the process of transmission, or the terminal receiving the data still does not have time to process to reflect its reception state in the PAN, which avoids retransmitting the transmitted data of the receiving end of the data, namely the data transmitting end of transmission data in an erroneous assumption that the reception error has occurred, so that the stored band width capacity.

Brief Description of the Drawings

FIG. 1 is a flowchart of a method for obtaining a data reception state in accordance with an embodiment of the present invention;

FIG. 2 is a flowchart of a method for confirming a data reception state in accordance with an embodiment of the present invention;

FIG. 3 is a flowchart of another method for obtaining a data reception state, in accordance with an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a first device in accordance with an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a communication system in accordance with an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a third device in accordance with an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a fourth device according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of another communication system in accordance with an embodiment of the present invention.

Detailed Description of Embodiments

First Embodiment

FIG. 1 is a flowchart of a method for obtaining a data reception state in accordance with an embodiment of the present invention. The method includes the following steps, in which:

1.1. The data in which the PAN is inserted is received, the PAN being the PAN in the RTTI block or in the BTTI block. In the case of a PAN in the RTTI block, having adopted the RTTI as the counting block, the RTT from the transmission of data corresponding to the PAN to return the PAN is calculated.

1.2. Get the interpretation parameter for the interpretation of the PAN, and the value of the interpretation parameter is less than BS_CV-MAX.

1.3. Interpret the PAN, in accordance with the interpretation parameter, for interpreting the PAN to obtain the reception status of the transmitted data, and the value of the interpretation parameter is less than BS_CV-MAX. The interpretation parameter may be an absolute value or an offset value. When the interpretation parameter is an absolute value, the terminal receiving the data into which the PAN is inserted can directly interpret the PAN in the RTTI block and in the BTTI block according to the interpretation parameter. When the interpretation parameter is an offset value, the terminal receiving the data into which the PAN is inserted can interpret the PAN in the RTTI block and in the BTTI block according to the result of the interpretation parameter and BS_CV-MAX.

In this embodiment, the RB in the PAN is interpreted by an interpretation parameter whose value is less than BS_CV-MAX. Since the value of the interpretation parameter is less than BS_CV-MAX and closer to RTT, RTT can be estimated more accurately, and additionally, real zeros and invalid zeros in RB can be distinguished more precisely, thereby significantly reducing data transmission delay.

In step 12, the interpretation parameter may include a first parameter for interpreting the PAN in the RTTI block and a second parameter for interpreting the PAN in the BTTI block. By interpreting the PAN according to the first parameter and the second parameter, in the interpretation parameter, it is possible to distinguish more precisely whether the valid zeros in the RB PAN are such that initially the valid zeros will not be considered invalid zeros, and therefore, incorrectly received RLC data blocks may be directly retransmitted, which reduces latency.

At step 12, the interpretation parameter can be obtained by receiving system information or point-to-point dedicated signaling. In this case, the second parameter may be BS_CV-MAX; the first parameter can be an absolute value, and the PAN in the RTTI block is interpreted directly by the first parameter; or, the first parameter can be an offset value, and the PAN in the RTTI block is interpreted as a result of the action of the first parameter and BS_CV-MAX.

Alternatively, the second parameter may be similar to the first parameter, that is, the second parameter is an absolute value, and the PAN in the BTTI block is interpreted directly by the second parameter; or, the second parameter is the offset value, and the PAN in the BTTI block is interpreted as a result of the action of the second parameter and BS_CV-MAX.

When the second parameter is BS_CV-MAX, the first parameter may be an offset value predetermined by the receiving end and the transmitting end of the data, namely, the default value, and there is no need to obtain the first parameter by receiving system information or point-to-point signaling. In this case, the data receiving end interprets the PAN in the RTTI block according to the result of the action of the first parameter and the second parameter.

Accordingly, a method for interpreting a data reception state, according to an embodiment of the present invention, may include: transmitting a predetermined interpretation parameter for interpreting the PAN to the device, so that the device interprets, in accordance with the interpretation parameter, the PAN in the data reception, in which the PAN is inserted, and the value of the interpretation parameter is less than the maximum countdown value.

Second Embodiment

For services using the PAN, the network may provide a parameter less than the generally accepted BS_CV_MAX for the transmitting end to interpret the PAN.

For example, a parameter is transmitted by radio in the system information, or the parameter is notified in point-to-point dedicated signaling, such as a temporary block streaming message on the uplink and downlink. The value of the parameter can be an absolute value, that is, the data receiving end can interpret the RB PAN using this parameter directly. The parameter value can also be an offset value, that is, the data receiving end can interpret the RB PAN using the value from the result of this value and the value BS_CV_MAX in the system information. The mode of action may be coordinated over the network and terminal.

Since radio period blocks include BTTI blocks and RTTI blocks, various parameters for interpreting multiple PANs can be set in data packet streams created from these two types of radio period blocks. For example, a parameter can be added to interpret the PAN in the RTTI block, namely, the first parameter, and BS_CV_MAX in the system information, namely, the second parameter is used to interpret the PAN in the BTTI block. The new parameter may be an absolute value or an offset value. When the new parameter is an absolute value, for example, when the length of the new BS_CV_MAX_PAN field is set to 4 bits to indicate a range of 0-15 block periods, the value in this field is used to interpret the PAN. When the new parameter is an offset value, for example, when the length of the new field "BS_CV_MAX_OFFSET" is set to 3 bits to indicate a range of 0-7 block periods, the difference between "BS_CV_MAX" in the system information and "BS_CV_MAX_OFFSET", that is (BS_CV_MAX - BS_CV_MAX_OFFSET) , can be used to interpret PAN.

In another example, two parameters, namely, the first parameter and the second parameter, can also be added to the system information and to the point-to-point dedicated signaling, respectively, for interpreting the PAN in the RTTI block and the PAN in the BTTI block. These two parameters can be absolute values or offset values. Details are shown in the previous example of the first parameter. The absolute value of the field "BS_CV_MAX_PAN_RTTI" or the offset value of the field "BS_CV_MAX_OFFSET_RTTI" can be set to interpret the PAN in the RTTI block, and the absolute value of the field "BS_CV_MAX_PAN_BTTI" or the offset value of the field "BS_CV_MAX_OFTIETB is specified for the BTB_TTI_BTTI_BTTIB.

In yet another example, BS_CV_MAX in the system information, namely the second parameter, can also be used to interpret the PAN in the BTTI block. The network and the terminal by default use the offset value, namely, the first parameter, which does not need to be notified through the alarm system. The value resulting from the action of BS_CV_MAX in the system information and the default offset value is used to interpret the PAN in the RTTI block. For example, it is agreed that BS_CV_MAX in the system information is used to interpret the PAN in the BTTI block, the default offset value set by the terminal and the network for interpreting the PAN in the RTTI block is 2, and BS_CV_MAX is the offset used to interpret the PAN in the RTTI block.

In this embodiment, in accordance with the different RTT intervals in the BTTI configuration and the RTTI configuration, two parameters are set respectively to more accurately distinguish which zeros in the RB PAN are valid in the two configurations, thereby reducing the delay and maintaining the bandwidth.

Third Embodiment

FIG. 2 is a flowchart of a method for confirming a data reception state in accordance with an embodiment of the present invention. The method includes the steps in which:

2.1. The PAN necessary for polling is inserted into the data to be transmitted, the PAN including an indicator on whether the receive window is zero, so that the data receiving device interprets the PAN according to the indicator to obtain a reception status of the transmitted device data.

2.2. Transmit data.

In this embodiment, according to the indicator about whether the reception window is zero, the device receiving the data can find out, in accordance with the indicator, whether the reception window of the terminal receiving data transmitted from the device is zero, thus, whether the transmitted the data is in a state of incorrect reception or is still in the process of transmission, or the terminal receiving the data still does not have time to process the data and reflect its reception status in the PAN, which avoids repeated transmission the transmission of the transmitted data by the data receiving end, namely, the data transmitting end of the transmitted data, under the erroneous assumption that a reception error has occurred, so that the bandwidth is preserved.

At step 21, a pointer may be represented by a BOW in the PAN.

Fourth Embodiment

FIG. 3 is a flowchart of another method for obtaining a data reception state, in accordance with an embodiment of the present invention. This embodiment corresponds to the third embodiment, and the quick decision procedure includes the following steps, in which:

3.1. The data including the PAN is received, and the PAN includes an indicator of whether the reception window is zero. Details of the indicator are provided in the third embodiment.

3.2. Interpret the PAN in accordance with the indicator to obtain the reception status of the transmitted data.

In this embodiment, the data receiving end knows, according to the indicator, whether the reception window of the terminal receiving data transmitted by the data transmitting end is zero, thus correctly distinguishing whether the transmitted data is in the wrong reception state or is still during the transmission, or the terminal receiving the data still does not have time to process the data and reflect its reception status in the PAN, which avoids the retransmission of data from the data receiving end, and enno transmitting end of transmission data in an erroneous assumption that the reception error has occurred, so that bandwidth is conserved.

Fifth Embodiment

, BOW должен быть 1. Когда сеть опрашивает терминал, чтобы сообщить PAN, PAN необходимо всегда включать в начало окна приема, то есть SSN всегда равна $$\text{V (Q) }+\text{ 1}$$

. Таким образом, BOW является только избыточным индикатором в опрошенных PAN, и независимо от того, имеется ли BOW, SSN опрошенных PAN всегда равна $$\text{V (Q) }+\text{ 1}$$

. Таким образом, по отношению к избыточной BOW в опрошенных PAN, при построении PAN, терминал может указать, является ли окно приема нулевым, используя 1 бит BOW. Если $$\text{BOW }=\text{ 0}$$

, это означает, что окно приема является нулевым, то есть $$\text{V (Q) }=\text{ V (R) }$$

и, если $$\text{BOW }=\text{ 1}$$

, это означает, что окно приема не является нулевым, то есть $$\text{V (Q) }<\text{V (R)}$$

.In this embodiment, 1 BOW bit is used to indicate whether the receive window is null. In the prior art, since $$\text{SSN}=\text{V (q)}+\text{one}$$

, BOW must be 1. When the network polls for the terminal in order to inform PAN, PAN must always be included at the beginning of the receive window, that is, the SSN is always equal $$\text{V (q)}+\text{one}$$

. Thus, the BOW is only a redundant indicator in the polled PAN, and regardless of whether there is a BOW, the SSN of the polled PAN is always equal $$\text{V (q)}+\text{one}$$

. Thus, with respect to the excess BOW in the polled PANs, when constructing the PAN, the terminal can indicate whether the receive window is null using 1 BOW bit. If $$\text{Bow}=\text{0}$$

, this means that the receive window is null, i.e. $$\text{V (q)}=\text{V (r)}$$

and if $$\text{Bow}=\text{one}$$

, this means that the receive window is not null, i.e. $$\text{V (q)}<\text{V (r)}$$

.

в окне передачи, все являются правильно принятыми, блок RLC с порядковым номером V(Q) находится в процессе передач, или терминал, принимающий этот блок RLC, вряд ли имеет время для обработки этого блока RLC. Таким образом, передающий конец не меняет состояние блока RLC с порядковым номером V(Q), и устанавливается состояние блока RLC, предшествующего $$\text{V (Q) - 1 }$$

в предварительное ACK. Передающий конец может дополнительно упростить обработку. В частности, после того как передающий конец знает, в соответствии с индикатором BOW, что окно приема принимающего конца является нулевым, передающий конец может, вместо интерпретации RB в PAN, непосредственно установить состояние блока RLC, предшествующего $$\text{V (Q) - 1 }$$

в окне передачи на предварительное ACK; и когда передающий конец подтверждает, что окно приема принимающего конца не является нулевым, V(Q) является неправильно принятым блоком RLC, и передающий конец повторно передает неправильно принятый V(Q) как можно скорее.After receiving the PAN, the data transmitting end confirms, in accordance with the BOW indicator in the PAN, whether the receive window is receiving the data of the data receiving end of the transmitting data at zero. When the transmitting end knows, in accordance with the indicator that the receiving window of the receiving end is zero, the RLC blocks preceding $$\text{V (Q) - 1}$$

in the transmission window, all are correctly received, the RLC block with the sequence number V (Q) is in the process of transmission, or the terminal receiving this RLC block is unlikely to have time to process this RLC block. Thus, the transmitting end does not change the state of the RLC block with the serial number V (Q), and the state of the RLC block preceding $$\text{V (Q) - 1}$$

in the preliminary ACK. The transmitting end may further simplify processing. In particular, after the transmitting end knows, in accordance with the BOW indicator, that the receiving end receiving window is zero, the transmitting end can, instead of interpreting RB in the PAN, directly set the state of the RLC block preceding $$\text{V (Q) - 1}$$

in the transfer window to the preliminary ACK; and when the transmitting end confirms that the receiving end receiving window is not zero, V (Q) is an incorrectly received RLC unit, and the transmitting end retransmits the incorrectly received V (Q) as soon as possible.

When the receive window is not null, if there are remaining bits in the RB, the receiving end and the transmitting end can agree on how the remaining places will be filled.

If the receiving end and the transmitting end have agreed that the receiving end fills these remaining places with zeros, the transmitting end may interpret the PAN in the BS_CV_MAX parameter after receiving the PAN, or interpret the PAN in accordance with the methods described in embodiments 1 through 3. For example, the state of the blocks RLCs in the transmission window, which correspond to bits whose values are 1, are set in RB as preliminary ACKs, and for bits whose values are 0 in RB, the actual 0 and invalid 0 in RB; and the states of incorrectly received blocks are set to NACK, and these incorrect blocks are retransmitted as soon as possible.

If the receiving end and the transmitting end agreed that the receiving end fills the remaining places with units, the transmitting end, after receiving the PAN, does not change the state of the RLC blocks in the transmission window, which correspond to bits whose values are 1 in RB, set the state of the RLC blocks in the transmission window that correspond to bits whose values are 0 in RB are on NACK, and these incorrect blocks are retransmitted as soon as possible.

In this embodiment, the data transmitting end can correctly distinguish, according to the BOW indicator, whether the transmitted data is received incorrectly, thereby eliminating retransmission of data that is not incorrectly received, so that the bandwidth is preserved.

Sixth Embodiment

Figure 4 is a schematic structural diagram of a first device in accordance with an embodiment of the present invention. The device may be a network device or a terminal device, including a first receiving module 41, a receiving module 42, and a first interpretation module 43. The first receiving module 41 is configured to receive data in which the PAN is included. The obtaining unit 42 is configured to receive an interpretation parameter for interpreting a short bitmap, wherein the value of the interpretation parameter is less than the maximum countdown value. The first interpretation module 43 is configured to interpret the PAN, in accordance with the interpretation parameter, in order to obtain the reception state of the transmitted data, the interpretation parameter value being less than BS_CV-MAX. Details are shown in the first embodiment.

In this embodiment, the device interprets the RB in the PAN by an interpretation parameter whose value is less than BS_CV-MAX. Since the value of the interpretation parameter is less than BS_CV-MAX and close to RTT, RTT can be estimated more accurately, and additionally, real zeros and invalid zeros in RB can be more accurately separated, thereby reducing transmission data delay.

The interpretation parameter may include a first parameter for interpreting the PAN in the RTTI block and a second parameter for interpreting the PAN in the BTTI block. The interpretation parameter can be obtained by receiving system information or a two-point dedicated signaling.

The second parameter is BS_CV-MAX, the first parameter is an absolute value, and the PAN in the RTTI block is interpreted directly by the first parameter, or, the first parameter is the offset value, and the PAN in the RTTI block is interpreted by the result of the first parameter and the second parameter; or

the first parameter is an absolute value, and the PAN in the RTTI block is interpreted directly by the first parameter, or, the first parameter is the offset value, while the PAN in the RTTI block is interpreted by the result of the first parameter and BS_CV-MAX; and

the second parameter is an absolute value, and the PAN in the BTTI block is interpreted directly by the second parameter, or, the second parameter is the offset value, and the PAN in the BTTI block is interpreted by the result of the second parameter and BS_CV-MAX; or

the second parameter is BS_CV-MAX, and the first parameter is an offset value predetermined by the receiving end and the transmitting end of the data, and the PAN in the RTTI block is interpreted in accordance with the result of the first parameter and the second parameter.

The second device, in accordance with an embodiment of the present invention, may include: a first transmission module, configured to transmit a predetermined interpretation parameter for interpreting the short bitmap to the device, so that the device interprets the short bitmap in the received data in which it is inserted a short bitmap, in accordance with the interpretation parameter, and the value of the interpretation parameter is less than the maximum countdown value.

Accordingly, a communication system in accordance with an embodiment of the present invention may include a first device and a second device.

5 is a schematic structural diagram of a communication system in accordance with an embodiment of the present invention. The system includes a first device 51 and a second device 52 and can perform all the functions of the first device in the previous embodiment of the device and all the functions of the second device in the previous embodiment of the device, thus realizing the technical solutions of the previous embodiments of the method.

Seventh Embodiment

FIG. 6 is a schematic structural diagram of a third device in accordance with an embodiment of the present invention. The device may be a network device or a terminal device, including: an insertion unit 61 and a transfer unit 62. The insertion unit 61 is configured to insert the PAN required for polling in the transmitted data, the PAN including an indicator on whether the receive window is zero, so that the data receiving device interprets the PAN according to the indicator to obtain a receive state transmitted device data; and the indicator may be resubmitted by BOW in the PAN. Transmission module 62 is configured to transmit data.

In this embodiment, the device transmits an indicator on whether the receive window is zero, so that the data receiving end can know, in accordance with the indicator, whether the data receive window of the terminal receiving the transmitted data from the data receiving end is zero, thus correctly distinguishing whether the transmitted data is in a state of incorrect reception or is still in the process of transmission, or the terminal receiving the data still does not have time to process the data and reflect its reception status in the PAN, thus azom avoiding retransmission of transmitted data receiving end data, namely the data transmitting end transmitted data at the wrong assumption that the reception error has occurred, so that the bandwidth is saved.

Eighth Embodiment

FIG. 7 is a schematic structural diagram of a fourth device according to an embodiment of the present invention. The device may be a network device or a terminal device including a second receiving module 71 and a second interpretation module 72. The second receiving module 71 is configured to receive data including the PAN, wherein the PAN includes an indicator of whether the receive window is zero; and the indicator may be resubmitted by BOW in the PAN. The second interpretation module 72 is configured to interpret the PAN, in accordance with the indicator, to receive the reception status of the transmitted data.

In this embodiment, the device recognizes, in accordance with the indicator, whether the reception window of the terminal receiving the data transmitted from the receiving end data is zero, thus correctly distinguishing whether the transmitted data is in the wrong reception state or is still in the process of transmission or the terminal receiving the data still does not have time to process the data and reflect its reception status in the PAN, thereby avoiding the retransmission of the transmitted data by the data receiving end, namely, the data transmitting the end of the transmitted data under the erroneous assumption that a reception error has occurred, so that the bandwidth is preserved.

Fig. 8 is a schematic structural diagram of another communication system in accordance with an embodiment of the present invention. The system includes a third device 81 and a fourth device 82 and can perform all the functions of the third device in the previous embodiment of the device and all the functions of the fourth device in the previous embodiment of the device, thus realizing the technical solutions of the previous embodiments of the methods.

Specialists in this field should be clear that all or part of the steps of the aforementioned embodiments of the methods can be implemented by appropriate hardware instructed by the program. The program may be stored on a computer-readable recording medium, and when executed, may include the steps of the above-mentioned embodiments of the methods. The storage medium may be any medium capable of storing program codes, such as read-only memory (ROM), random access memory (RAM), a magnetic disk, and a non-rewritable compact disc (CD-ROM).

In conclusion, it should be noted that the above embodiments are used only to describe the technical solution of the presented invention, and are not limited to the technical solution of the presented invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still make changes to the technical solutions described in the previous embodiments or make equivalent replacements for some of their technical features without departing from the scope of the technical solution of the embodiments of the present invention.

Claims (14)

1. A method of obtaining a state of receiving data, characterized in that it comprises the steps in which:
receive data into which a short bitmap is inserted (11);
receive an interpretation parameter for interpreting the short bitmap, and the value of the interpretation parameter is less than the maximum countdown value (12); and
interpret the short bitmap in accordance with the interpretation parameter to obtain the receive status of the transmitted data (13). 2. The method of obtaining the state of receiving data according to claim 1, in which:
the interpretation parameter is an absolute value, and the interpretation of the short bitmap in accordance with the interpretation parameter contains: direct interpretation of the short bitmap by the absolute value, and the short bitmap is a short bitmap in a block of a reduced transmission time interval (RTTI) of the transmitted data or a short bitmap in the block of the main transmission time interval (BTTI) of the transmitted data; or
the interpretation parameter is the offset value, and the interpretation of the short bitmap in accordance with the interpretation parameter contains: interpretation of the short bitmap based on the effect of the offset value and the maximum countdown value, and the short bitmap is a short bitmap in the transmitted data RTTI block or a short bitmap in the BTTI block of the transmitted data. 3. The method of obtaining a data reception state according to claim 1, wherein the interpretation parameter comprises a first parameter for interpreting a short bit array in a reduced transmission time interval block (RTTI) and a second parameter for interpreting a short bit array in a reduced transmission time interval block (BTTI) . 4. A method of obtaining a data reception state according to any one of claims 1 to 3, in which the interpretation parameter is obtained by receiving system information or point-to-point dedicated signaling. 5. The method of obtaining the state of receiving data according to claim 3, in which:
the first parameter is an absolute value, and the short bitmap in the RTTI block is interpreted directly by the first parameter; or the first parameter is the offset value, and the short bitmap in the RTTI block is interpreted according to the result of the first parameter and the maximum countdown value;
the second parameter is an absolute value, and the short bitmap in the BTTI block is interpreted directly by the second parameter; or the second parameter is the offset value, and the short bitmap in the BTTI block is interpreted according to the result of the second parameter and the maximum countdown value. 6. A method of interpreting the state of receiving data, characterized in that it comprises the steps in which:
transmitting a predetermined interpretation parameter for interpreting the short bitmap to the device, so that the device interprets, in accordance with the interpretation parameter, the short bitmap in the received data into which the short bitmap is inserted, and the value of the interpretation parameter is less than the maximum countdown value. 7. The method of interpreting the state of receiving data according to claim 6, in which:
the interpretation parameter contains a first parameter for interpreting a short bit array in a reduced transmission time interval (RTTI) block and a second parameter for interpreting a short bit array in a basic transmission time interval (BTTI) block. 8. A communication device, characterized in that it contains:
a first receiving module configured to receive data into which a short bitmap is inserted;
a receiving module configured to receive an interpretation parameter for interpreting the short bitmap, wherein the value of the interpretation parameter is less than the maximum countdown value; and
a first interpretation module configured to interpret the short bitmap in accordance with the interpretation parameter to obtain a reception state of the transmitted data. 9. The communication device of claim 8, in which:
the interpretation parameter is an absolute value; moreover, the first interpretation module, in particular, is configured to directly interpret the short bitmap by absolute value, and the short bitmap is a short bitmap in the block of the reduced transmission time interval (RTTI) of the transmitted data or a short bitmap in the block of the main transmission time interval ( BTTI) transmitted data; or
the interpretation parameter is the offset value; moreover, the first interpretation module, in particular, is configured to interpret the short bitmap based on the effect of the offset value and the maximum countdown value, the short bitmap being a short bitmap in the RTTI block of transmitted data or a short bitmap in the BTTI block of transmitted data. 10. The communication device of claim 8, wherein the interpretation parameter comprises a first parameter for interpreting a short bitmap in a reduced transmission time interval block (RTTI) and a second parameter for interpreting a bitmap in a reduced transmission time interval block (BTTI). 11. The communication device according to any one of paragraphs.8-10, in which the interpretation parameter is obtained by receiving system information or point-to-point dedicated signaling. 12. The communication device of claim 10, in which:
the first parameter is an absolute value, and the short bitmap in the RTTI block is interpreted directly by the first parameter; or the first parameter is the offset value, and the short bitmap in the RTTI block is interpreted according to the result of the first parameter and the maximum countdown value;
the second parameter is an absolute value, and the short bitmap in the BTTI block is interpreted directly by the second parameter; or the second parameter is the offset value, and the short bitmap in the BTTI block is interpreted by the result of the second parameter and the maximum countdown value. 13. A communication device, characterized in that it contains:
a first transmitting unit configured to transmit a predetermined interpretation parameter for interpreting the short bitmap to the device, such that the device interprets, in accordance with the interpretation parameter, the short bitmap in the received data into which the short bitmap is inserted, the interpretation parameter being smaller, than the maximum countdown value. 14. The communication device of claim 13, wherein the interpretation parameter comprises a first parameter for interpreting the short bitmap in a reduced transmission time interval (RTTI) block and a second parameter for interpreting a short bitmap in a basic transmission time interval block (BTTI).

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