CN101141445A - Transmission method and sending end device of a transmission unit - Google Patents

Abstract

The present invention provides a transmission method of a transmission unit and a sending end device, the core of which is: the sending end performs transmission scheduling on the transmission unit to be sent based on the principle of priority scheduling of the transmission unit containing control information, and sends the transmission according to the transmission scheduling result unit. The sending end in the present invention can transmit the control information to the receiving end in time, such as generating status reports, reset PDUs, reset confirmation PDUs, etc. to the receiving end in time; Realization can be implemented at the MAC layer, or both at the RLC and MAC layers, thereby saving the cache of the sending end, reducing the delay of data retransmission, and enabling the peer entities at the receiving end and the sending end to synchronize in time; thus through this The technical scheme provided by the invention realizes the purpose of improving the performance of the EUTRAN system and perfecting the EUTRAN system.

Description

Transmission method and sending end device of a transmission unit

technical field

The invention relates to the technical field of network communication, in particular to a transmission method of a transmission unit and a sending end device.

Background technique

WCDMA (Wideband Code Division Multiple Access) research work began in the early 1990s. From 1998 to the present, the technical specifications of the WCDMA system have gone through the stages of Release 99, Release 4, Release 5, and Release 6. At present, the standardization work on Release 7 has begun to be implemented. At the same time, LTE (Long Term Evolution long-term evolution) research has also begun to gradually become a new focus of standardization work.

LTE will be completely new from the system framework to the physical layer. LTE aims to provide users with services with higher speed and better performance. The UTRAN in LTE is currently called E-UTRAN (evolved UMTST Terrestrial Radio Access Network, evolved UMTS Terrestrial Radio Access Network).

In the EUTRAN system, the RLC layer is moved down to the base station, the RNC is canceled, and the aGW (access gateway) is located in the core network. The difference from the UTRAN system includes: the RLC segmentation in the UTRAN system is static or semi-static, such as AMD PDUs are of equal size, while in the EUTRAN system, the segmentation of the RLC layer is based on the real-time channel quality, that is, the segmentation is non-static. equal size.

The protocol stack architecture of the user plane of the EUTRAN system is different from the protocol stack architecture of the user plane of the UTRAN system, and the differences are shown in Figure 1 and Figure 2 .

Figure 1 is the protocol stack architecture of the user plane of the EUTRAN system. The protocol stack of the UE (user equipment) in the EUTRAN system includes: PHY (physical layer), MAC (media access control layer), RLC (radio link control layer), PDCP (Packet Data Convergence Protocol). The protocol stack of ENodeB includes: PHY (physical) layer, MAC (medium access control) layer, and RLC (radio link control) layer. The aGW communicates with the UE through PDCP.

Figure 2 shows the protocol stack architecture of the user plane of the UTRAN system. The RLC layer in the UTRAN system is located in the RNC, the MAC-d entity in the MAC layer is located in the RNC, and the MAC-hs entity is located in the base station.

In the UTRAN system, the method for the network side to send the control PDU to the user terminal is: the RLC layer AMD PDU and control PDU, such as status report, are sent to the MAC-d entity through a dedicated logical channel, and the MAC-d entity sends the AMD PDU, The control PDU and so on form a MAC-d flow, that is, a group of MAC-d PDUs. The RNC sends the MAC-d flow to the MAC-hs entity of the MAC layer of the base station through its Iub interface with the base station. The above status report consists of a set of status PDUs, which can be carried in AMD PDUs, or can be generated separately. After the MAC-hs entity receives the MAC-d flow, it composes the MAC-dPDU in the MAC-d flow into a MAC-hs PDU, and sends it to the HARQ entity for physical layer transmission until the user terminal receives it correctly. The user terminal performs corresponding operations according to the received control PDU, such as deleting and retransmitting data according to the received status report. The method for the user terminal to send the control PDU to the network side is the reverse process of the above process, and will not be described in detail here.

The data format of the above MAC-hs PDU is shown in Figure 3. A MAC-hs PDU in Figure 3 consists of a MAC-hs header and multiple MAC-d PDUs. The above RLC data PDU carrying the stateful PDU is shown in FIG. 4 . In Figure 4, the Sequence number represents the sequence number, P represents the polling bit, HE represents the header extension type, E represents the extension bit, Length indicator represents the length indication, Data represents data, and PADor a piggybacked STATUS PDU represents the filling or carrying status PDU. The status PDU generated separately above is shown in FIG. 5 . In Figure 5, D/C indicates whether the PDU is a data PDU or a control PDU, PDUTYPE indicates the PDU type, SUFI indicates a super domain, and PAD indicates padding.

In the transmission method of the above-mentioned control PDU, when the MAC-hs entity forms the MAC-hs PDU, it fills the MAC-d PDU into the MAC-hs PDU according to the order in which the MAC-d flow is sent from the RNC to the base station, and the insufficient part The padding method is used to form MAC-hs PDU. In this way, the control PDUs of the RLC layer, such as status PDUs and reset PDUs, may be scheduled to be transmitted later, and the control PDUs cannot be transmitted in time, which causes some problems. Delete and retransmit, so that not only occupies the cache of the sending end, but also increases the delay of data retransmission, affecting the quality of service; if the reset PDU cannot be transmitted in time, the peer entities at both ends cannot be synchronized in time, resulting in interruption of business.

Since the system architecture in the EUTRAN system is brand new, the above method for transmitting the control PDU cannot be directly applied to the EUTRAN system. If the above-mentioned control PDU transmission method is simply improved according to the system framework of the EUTRAN system, the above-mentioned problems existing in the UTRAN system will still exist. The transmission method of the control PDU in the EUTRAN system needs to be further improved.

Contents of the invention

The purpose of the present invention is to provide a transmission method of a transmission unit and a device at the sending end, so that the control information sent by the sending end can be transmitted to the receiving end in time, thereby realizing the purpose of improving the performance of the EUTRAN system and perfecting the EUTRAN system.

In order to achieve the above purpose, the present invention provides a transmission method for a transmission unit, including:

a. Based on the principle of priority scheduling of transmission units containing control information, the sending end performs transmission scheduling on the transmission units to be sent, and sends the transmission units according to the transmission scheduling result.

The technical solutions of the following methods are optional technical solutions.

Described step a comprises:

The radio link control RLC layer at the sending end preferentially schedules the transmission units containing the control information, and preferentially sends the transmission units containing the control information to the medium access control MAC layer.

The step of preferentially sending the transmission unit containing the control information to the MAC layer includes:

The RLC layer at the sending end fills the control PDU into the RLC data PDU prior to the service data, and transmits the RLC data PDU carrying the control PDU to the MAC layer; and/or

The RLC layer at the sending end prioritizes the scheduling of the control PDU, and sends the control PDU to the MAC layer prior to the RLC data PDU.

The RLC layer at the sending end fills the service data into the RLC data PDU after being divided, or the RLC layer at the sending end fills the service data into the RLC data PDU after being divided and concatenated.

The RLC data PDU carrying the control PDU includes: the RLC data PDU carrying the status PDU, and/or the reset PDU, and/or the reset confirmation PDU.

Described step a comprises:

The MAC layer at the sending end preferentially multiplexes the RLC PDU containing control information into a MAC PDU, and sends it to the HARQ entity for physical layer transmission.

The transmission unit containing control information includes: a transmission unit containing control information that needs to be retransmitted, and/or a non-retransmitted transmission unit containing control information.

The method further includes: when the transmission of the transmission block containing the control information fails, the lower layer of the sending end requests the upper layer of the sending end to retransmit the transmission unit containing the control information.

The present invention provides a sending end device, and the sending end device includes:

Scheduling module: used to perform transmission scheduling for transmission units that need to be transmitted by adopting the principle of priority scheduling of transmission units containing control information;

A sending module: configured to send a transmission unit according to the transmission scheduling result.

The following technical solutions of the sending end device are optional technical solutions.

When the RLC layer of the sending end device is provided with a scheduling module and a sending module, the scheduling module includes an RLC scheduling submodule, and the sending module includes an RLC scheduling submodule;

RLC scheduling sub-module: used to fill the control PDU in the RLC layer of the sending end into the RLC data PDU prior to the service data; and/or perform priority scheduling on the control PDU of the RLC layer of the sending end;

The RLC sending submodule: used to transmit the RLC data PDU carrying the control PDU to the MAC layer; and/or transmit the control PDU with priority scheduling to the MAC layer.

When the MAC layer of the sending end device is provided with a scheduling module and a sending module, the scheduling module includes a MAC scheduling submodule, and the sending module includes a MAC sending submodule;

MAC scheduling sub-module: used to preferentially multiplex RLC PDUs containing control information in the MAC layer of the sending end into MAC PDUs;

MAC sending sub-module: used to send MAC PDU to HARQ entity for physical layer transmission.

The device also includes:

Request module: used for requesting the upper layer of the sending end to retransmit the transmission unit containing the control information when the transmission block containing the control information fails to transmit.

From the description of the above technical solution, it can be seen that the transmitting end in the present invention schedules the transmission of the transmission unit by adopting the transmission unit priority scheduling principle including control information, so that the control information sent by the transmitting end can be transmitted to the receiving end in time; the transmission of the present invention The method can be realized at the RLC layer of the sending end, can be realized at the MAC layer, can also be realized at both the RLC and the MAC layer, and the implementation mode is flexible; when the control information in the present invention is a status report, the present invention can make the sending end of the data Perform data deletion and retransmission processing in time, thereby saving the cache of the sending end, improving the utilization rate of the sending end cache, reducing the time delay of data retransmission, and improving the quality of service; when the control information in the present invention is reset PDU 1. When the PDU is reset and confirmed, the present invention enables the peer entities of the receiving end and the sending end to be synchronized in time, thereby effectively avoiding the phenomenon of service interruption; thereby realizing the purpose of improving the performance of the EUTRAN system and perfecting the EUTRAN system through the technical solution provided by the present invention .

Description of drawings

Figure 1 is a schematic diagram of the protocol stack architecture of the user plane of the EUTRAN system;

Fig. 2 is a schematic diagram of the protocol stack architecture of the user plane of the UTRAN system;

Fig. 3 is the data format schematic diagram of the MAC-hs PDU of prior art;

Fig. 4 is a schematic diagram of an AMD PDU carrying a stateful PDU of the prior art;

FIG. 5 is a schematic diagram of a status PDU in the prior art;

Fig. 6 is a method flowchart of an embodiment of the present invention;

Fig. 7 is the first schematic diagram of the format of the RLC PDU of the embodiment of the present invention;

Fig. 8 is the second schematic diagram of the format of the RLC PDU of the embodiment of the present invention;

FIG. 9 is a third schematic diagram of the format of the RLC PDU according to the embodiment of the present invention.

Detailed ways

The present invention provides a set of effective and feasible technical solutions for the transmission of the EUTRAN system transmission unit, and the transmission method of the transmission unit provided by the present invention is shown in FIG. 6 . In FIG. 6 , firstly, when sending the transmission unit, the sender that sends the control information uses the priority scheduling principle of the transmission unit containing the control information to schedule the transmission of the transmission unit, and then, the sender sends the transmission unit according to the transmission scheduling result. In this way, the control information can be transmitted to the receiving end in time.

In the technical solution of the present invention, the location where the sending end implements priority transmission scheduling is related to the actual protocol framework of the EUTRAN system. Based on the protocol framework of the current EUTRAN system, the specific implementation method of the sending end of the present invention for priority transmission scheduling is very flexible. For example, when the sending end can only schedule transmission units at the RLC layer, the transmission unit priority scheduling principle that includes control information is used to queue The transmission unit in the queue performs transmission scheduling; for another example, when the sending end can only schedule the transmission unit at the MAC layer, the transmission unit in the queue is scheduled using the priority scheduling principle of the transmission unit containing control information; the sending end can also perform transmission scheduling at the RLC layer In both the MAC layer and the transmission unit scheduling principle, the priority scheduling principle of the transmission unit including the control information is adopted to schedule the transmission unit.

In the technical solution of the present invention, the control information is relative to the service data information, and the transmission unit containing the control information may be a control PDU, or an RLC data PDU carrying the control PDU. The control PDU can have many different forms according to the actual application of the EUTRA system. For example, the control PDU is a status PDU, and a group of status PDUs form a status report. For example, the control PDU is a reset PDU, and the control PDU can also be a reset confirmation. PDUs and more. The present invention does not limit the specific expression form of the control PDU. In the present invention, the RLC data PDU carrying the control PDU may carry any one or more of a status PDU, a reset PDU, a reset confirmation PDU, and the like according to specific needs.

In the technical solution of the present invention, when the RLC layer at the sending end performs priority transmission scheduling and assembles the RLC PDU, it can simultaneously carry the control PDU and service data in the RLC data PDU, or make the RLC PDU only carry the control PDU.

The implementation mode of the transmission method of the transmission unit provided by the present invention is flexible. The technical solution provided by the present invention will be described in detail below by taking several specific implementation methods as examples in conjunction with the accompanying drawings.

Embodiment 1. At the RLC layer, the status PDU is carried in the RLC data PDU. The RLC layer performs priority transmission scheduling on the RLC data PDU including the status PDU and other control PDUs such as reset PDUs. The MAC layer performs priority transmission scheduling on the RLC data including the status PDU. After the PDU is multiplexed with the above-mentioned other control PDUs, priority transmission scheduling is performed.

The RLC layer at the sending end determines the size of the RLC PDU according to the CQI (Channel Quality Indication), and divides the service data received from the upper layer according to the determined size without cascading, so that when the MAC layer composes the MAC PDU, the segmentation The size of the generated RLC PDU plus the control PDU matches the MAC PDU.

When the RLC layer at the sending end divides the business data, if there is a status PDU, it will first fill the status PDU into the RLC PDU, and the remaining space in the RLC PDU will be filled with the divided business data. At this time, the RLC PDU including the status PDU may be called an RLC data PDU.

Since the RLC layer segmentation function is based on the immediate channel quality in the EUTRAN system, the padding in the RLC PDU of the RLC layer can be canceled. When transmitting RLC PDU, increase the priority of status PDU, and put status PDU into RLC PDU first for transmission.

In Embodiment 1, the RLC data PDU carries both the status PDU and the service data. At this time, the format of the RLC data PDU is shown in FIG. 7 . The RLC data PDU in Figure 7 includes: RLC PDU header, business data and carried status PDU, since an RLC data PDU may contain a status PDU, or may not include a status PDU, so the status in the RLC data PDU PDU is optional. Control PDUs such as the reset PDU and reset confirmation PDU are not carried in the RLC data PDU.

When the RLC layer at the sending end does not transmit service data, the RLC layer does not need to carry the status PDU in the RLC data PDU, but directly sends the status PDU to the MAC layer first. The status PDU at this time can be called an RLC control PDU.

The MAC layer at the sending end receives the RLC data PDU and RLC control PDU transmitted by the RLC layer, preferentially multiplexes the RLC data PDU and RLC control PDU containing the stateful PDU to form a MAC PDU, and sends the MAC PDU to HARQ for physical layer transport. That is, the MAC layer at the sending end preferentially schedules the queues containing the RLC data PDUs and RLC control PDUs containing stateful PDUs, multiplexes the RLC PDUs in the queues into MAC PDUs, and sends the MAC PDUs to HARQ for physical layer transmission.

When the transmission block of RLC data PDU and control PDU sent by the MAC layer of the sending end fails to transmit, the MAC layer of the sending end requests the RLC layer of the sending end to retransmit the control PDU contained in the failed MAC PDU or The RLC data PDU, after receiving the request, the RLC regenerates the control PDU or RLC data PDU, and performs priority transmission scheduling on these regenerated control PDUs or RLC data PDUs during the retransmission process. The present invention is not limited to the technical scheme that the MAC layer requests the RLC layer to retransmit, and the present invention is applicable as long as the lower layer requests the upper layer to perform retransmission.

When retransmission occurs at the RLC layer, the MAC layer can also use the priority scheduling principle to send control PDUs such as RLC data PDUs carrying status PDUs and reset PDUs first.

Embodiment 2. In the RLC layer, the control PDU is carried in the RLC data PDU, the RLC layer performs priority transmission scheduling on the RLC data PDU including the control PDU, and the MAC layer performs priority transmission scheduling on the RLC data PDU including the control PDU.

Embodiment 2 is implemented in the same manner as Embodiment 1, the difference being that all control PDUs can be preferentially carried in RLC data PDUs, where the control PDUs can be status PDUs, reset PDUs, reset confirmation PDUs, and the like.

In Embodiment 2, the format of the RLC data PDU is shown in FIG. 8 . The RLC data PDU in Fig. 8 includes: RLC PDU head, service data and the control PDU carried, because a RLC data PDU may contain the control PDU, or may not contain the control PDU, so the control PDU in the RLC data PDU PDU is optional.

When the RLC layer at the sending end does not transmit service data, the RLC layer does not need to carry the control PDU in the RLC data PDU, but directly sends the control PDU to the MAC layer first. The control PDU at this time can be called an RLC control PDU.

The MAC layer at the sending end receives the RLC data PDU and RLC control PDU transmitted by the RLC layer, preferentially multiplexes the RLC data PDU and RLC control PDU containing the control PDU to form a MAC PDU, and sends the MAC PDU to HARQ for physical layer transport.

The MAC layer at the sending end receives the RLC data PDU and RLC control PDU transmitted by the RLC layer, preferentially multiplexes the RLC data PDU and RLC control PDU containing the control PDU to form a MAC PDU, and sends the MAC PDU to HARQ for physical layer transport. That is, the MAC layer at the sending end preferentially schedules the queue containing the RLC data PDU and the RLC control PDU containing the control PDU, multiplexes the RLC PDU in the queue into a MAC PDU, and sends the MAC PDU to HARQ for physical layer transmission.

When the transmission block of the RLC data PDU containing the control PDU and the transmission block of the control PDU, namely the MAC PDU, transmitted by the MAC layer of the sending end fails, the MAC layer of the sending end requests the RLC layer of the sending end to retransmit the control PDU or RLC contained in the MAC PDU that failed to be transmitted. For data PDUs, after receiving the request, the RLC regenerates the control PDUs or RLC data PDUs, and performs priority transmission scheduling on these regenerated control PDUs or RLC data PDUs during the retransmission process.

When the RLC layer retransmits, the MAC layer can also use the priority scheduling principle to send control PDUs including RLC data PDUs carrying control PDUs and reset PDUs.

Embodiment 3: In the RLC layer, the control PDU is not carried in the RLC data PDU, the RLC layer performs priority transmission scheduling on the control PDU, and the MAC layer performs priority transmission scheduling on the RLC control PDU.

When transmitting data, the RLC layer at the sending end determines the size of the RLC PDU according to the CQI (Channel Quality Indication), and divides the business data transmitted by the upper layer according to the determined RLC PDU size, without cascading, so as to multiplex the MAC at the MAC layer. In the process of PDU, the size of the RLC data PDU and control PDU generated after segmentation is matched with the MAC PDU.

In Embodiment 3, the format of the RLC data PDU is shown in FIG. 9 . The RLC data PDU in Figure 9 includes: RLC PDU header and service data.

The RLC layer at the sending end does not need to carry the control PDU in the RLC data PDU, and the RLC layer transmits the RLC control PDU and the RLC data PDU not carrying any control PDU to the MAC layer. The MAC layer at the sending end receives the RLC data PDU and RLC control PDU transmitted by the RLC layer, preferentially multiplexes the RLC control PDU into a MAC PDU, and sends the MAC PDU to HARQ for physical layer transmission. That is, the MAC layer at the sending end preferentially schedules the queue where the RLC control PDU is located, multiplexes the RLC PDU in the queue into a MAC PDU, and sends the MAC PDU to HARQ for physical layer transmission.

When the transmission block containing the control PDU sent by the MAC layer of the sending end, that is, the MAC PDU transmission fails, the MAC layer of the sending end requests the RLC layer of the sending end to retransmit the control PDU contained in the MAC PDU that failed to be transmitted. After receiving the request, the RLC retransmits Generate the control PDUs, and perform priority transmission scheduling on these regenerated control PDUs during the retransmission process.

When retransmission occurs at the RLC layer, the MAC layer can also use the priority scheduling principle to send the control PDU first.

Embodiment 4, at the RLC layer, the state PDU is carried in the RLC data PDU, the RLC layer carries out priority transmission scheduling to the RLC data PDU containing the state PDU and other control PDUs such as reset PDUs, and the MAC layer contains the RLC data of the state PDU PDU and RLC control PDU for priority transmission scheduling.

Embodiment 4 is implemented in the same way as Embodiment 1, with the difference that: the RLC layer at the sending end divides and concatenates the service data transmitted from the upper layer to form an RLC data PDU. RLC data PDUs can still carry status PDUs.

When the transmission block of RLC data PDU and control PDU sent by the MAC layer of the sending end fails to transmit, the MAC layer of the sending end requests the RLC layer of the sending end to retransmit the control PDU contained in the failed MAC PDU or The RLC data PDU, after receiving the request, the RLC regenerates the control PDU or RLC data PDU, and performs priority transmission scheduling on these regenerated control PDUs or RLC data PDUs during the retransmission process.

When retransmission occurs at the RLC layer, the MAC layer can also use the priority scheduling principle to send control PDUs such as RLC data PDUs carrying status PDUs and reset PDUs first.

Embodiment 5. In the RLC layer, the control PDU is carried in the RLC data PDU, the RLC layer performs priority transmission scheduling on the RLC data PDU including the control PDU, and the MAC layer performs priority transmission scheduling on the RLC data PDU including the control PDU.

Embodiment 5 is implemented basically the same as Embodiment 2, the difference being that: the RLC layer at the sending end divides and concatenates the service data to form an RLC data PDU. The RLC data PDU can still carry the control PDU.

When the transmission block of the RLC data PDU containing the control PDU and the transmission block of the control PDU, namely the MAC PDU, transmitted by the MAC layer of the sending end fails, the MAC layer of the sending end requests the RLC layer of the sending end to retransmit the control PDU or RLC contained in the MAC PDU that failed to be transmitted. For data PDUs, after receiving the request, the RLC regenerates the control PDUs or RLC data PDUs, and performs priority transmission scheduling on these regenerated control PDUs or RLC data PDUs during the retransmission process.

When the RLC layer retransmits, the MAC layer can also use the priority scheduling principle to send control PDUs including RLC data PDUs carrying control PDUs and reset PDUs.

Embodiment 6: In the RLC layer, the control PDU is not carried in the RLC data PDU, the RLC layer performs priority transmission scheduling on the control PDU, and the MAC layer performs priority transmission scheduling on the RLC control PDU.

Embodiment 6 is basically the same as Embodiment 3, the difference being that: the RLC layer at the sending end divides and concatenates the service data to form an RLC data PDU. The RLC data PDU does not carry the control PDU.

When the transmission block containing the control PDU sent by the MAC layer of the sending end, that is, the MAC PDU transmission fails, the MAC layer of the sending end requests the RLC layer of the sending end to retransmit the control PDU contained in the MAC PDU that failed to be transmitted. After receiving the request, the RLC retransmits Generate the control PDUs, and perform priority transmission scheduling on these regenerated control PDUs during the retransmission process.

When retransmission occurs at the RLC layer, the MAC layer can also use the priority scheduling principle to send the control PDU first.

The present invention also provides a sender device, which is provided with a scheduling module, a sending module and a request module. The scheduling module is mainly used for scheduling the transmission units that need to be transmitted by adopting the principle of priority scheduling of transmission units containing control information; the sending module is mainly used for sending transmission units according to the transmission scheduling result of the scheduling module.

The positions of the scheduling module and the sending module in the present invention are related to the actual protocol framework of the EUTRAN system. Based on the protocol framework of the current EUTRAN system, the scheduling module and the sending module of the present invention may only be located at the RLC layer, or only at the MAC layer, or both at the RLC layer and the MAC layer. Specifically as described in the above method.

When both the RLC layer and the MAC of the sending end device are provided with a scheduling module and a sending module, the scheduling module includes an RLC scheduling submodule and a MAC scheduling submodule, and the sending module includes: the scheduling module includes an RLC scheduling submodule, and the sending module Including RLC scheduling sub-module and MAC sending sub-module.

The RLC scheduling sub-module is mainly used to fill the control PDU in the RLC layer of the sending end into the RLC data PDU prior to the service data, and fill the remaining space of the RLC data PDU with service data. The RLC scheduling submodule can also schedule the control PDU preferentially, and transmit the control PDU preferentially to the MAC layer. The RLC scheduling submodule may adopt the RLC layer priority scheduling method in the multiple embodiments described in the above methods, which will not be described in detail here.

When the RLC scheduling submodule only preferentially carries the status PDU in the RLC data PDU in the case of service data transmission, and prioritizes scheduling of the status PDU in the case of no service data transmission, the RLC sending submodule is mainly used for scheduling according to the RLC The scheduling result of the sub-module transmits the RLC data PDU carrying the status PDU, the RLC data PDU not carrying the status PDU and the RLC control PDU to the MAC layer. The MAC layer receives the RLC data PDU and the RLC control PDU. At this time, the MAC scheduling submodule preferentially multiplexes the RLC data PDU and the RLC control PDU containing the stateful PDU into MAC PDUs, and the MAC sending submodule is based on the scheduling result of the MAC scheduling submodule. Send the MAC PDU to the HARQ entity for physical layer transmission. The details are as described in the foregoing method embodiments.

When the RLC scheduling submodule carries control PDUs such as status PDU and reset PDU in the RLC data PDU when there is service data transmission, and when there is no service data transmission, when the control PDU is prioritized, the RLC sending submodule mainly It is used to transmit the RLC data PDU carrying the control PDU, the RLC data PDU not carrying the control PDU and the RLC control PDU to the MAC layer according to the scheduling result of the RLC scheduling submodule. The MAC layer receives the RLC data PDU and the RLC control PDU. At this time, the MAC scheduling submodule preferentially multiplexes the RLC data PDU and the RLC control PDU containing the control PDU into MAC PDUs, and the MAC sending submodule according to the scheduling result of the MAC scheduling submodule Send the MAC PDU to the HARQ entity for physical layer transmission. The details are as described in the foregoing method embodiments.

When the RLC scheduling submodule does not carry the control PDU in the RLC data PDU when there is service data transmission or no service data transmission, the RLC sending submodule is mainly used to send the RLC control PDU according to the scheduling result of the RLC scheduling submodule. PDUs and RLC data PDUs are transmitted to the MAC layer. The MAC layer receives the RLC data PDU and the RLC control PDU. At this time, the MAC scheduling sub-module preferentially multiplexes the RLC control PDU into a MAC PDU, and the MAC sending sub-module sends the MAC PDU to the HARQ entity for physical processing according to the scheduling result of the MAC scheduling sub-module. layer transport. The details are as described in the foregoing method embodiments.

When the sending end includes the MAC layer and the RLC layer, the request module can be located in the MAC layer, mainly used to request the sending end RLC layer to retransmit the RLC control PDU or the RLC data carrying the control PDU when the transmission of the MAC PDU containing control information fails PDUs. After receiving the request from the request module, the RLC layer retransmits the corresponding control PDU, or retransmits the corresponding control PDU and corresponding service data. These retransmitted control PDUs or RLC data PDUs carrying control PDUs also need to be prioritized. , as described in the above method.

Although the present invention has been described by way of example, those of ordinary skill in the art know that there are many variations and changes in the present invention without departing from the spirit of the invention, and the claims of the application document of the present invention include these variations and changes.

Claims (12)

1. the sending method of a transmission unit is characterized in that, described method comprises step:

A, transmitting terminal are based on the principle of the transmission unit priority scheduling that comprises control information, and the transmission unit that needs are sent carries out transmitting and scheduling, and sends transmission unit according to the transmitting and scheduling result.

2. the method for claim 1 is characterized in that, described step a comprises:

Transmitting terminal Radio Link control rlc layer priority scheduling contains the transmission unit of control information, and the transmission unit that preferentially will contain control information is sent to media interviews control MAC layer.

3. method as claimed in claim 2 is characterized in that, the step that the described transmission unit that preferentially will contain control information is sent to the MAC layer comprises:

The transmitting terminal rlc layer will be controlled PDU and have precedence over business datum and insert in the RLC data PDU, and the RLC data PDU that will carry control PDU transfers to the MAC layer; And/or

Transmitting terminal rlc layer priority scheduling control PDU will control PDU and have precedence over the RLC data PDU and be sent to the MAC layer.

4. method as claimed in claim 3 is characterized in that, the transmitting terminal rlc layer is inserted described business datum in the RLC data PDU after over-segmentation, and perhaps the transmitting terminal rlc layer is inserted described business datum in the RLC data PDU through behind the division cascade.

5. method as claimed in claim 3 is characterized in that, the RLC data PDU that carries control PDU comprises: carry status PDU and/or reset PDU and/or reset and confirm the RLC data PDU of PDU.

6. the method for claim 1 is characterized in that, described step a comprises:

The RLC PDU that transmitting terminal MAC layer preferentially will contain control information is multiplexed with MAC PDU, and is sent to the HARQ entity and carries out physical layer transmission.

7. as claim 1 or 2 or 3 or 4 or 5 or 6 described methods, it is characterized in that the described transmission unit that comprises control information comprises: the transmission unit that comprises control information that needs retransmit and/or the transmission unit that comprises control information of non-re-transmission.

8. as claim 1 or 2 or 3 or 4 or 5 or 6 described methods, it is characterized in that described method also comprises: when comprising the transport block transmission failure of control information, transmitting terminal lower floor request transmitting terminal upper strata retransmits the transmission unit that comprises control information.

9. a sending ending equipment is characterized in that, described sending ending equipment comprises:

Scheduler module: be used to adopt the principle of the transmission unit priority scheduling that comprises control information, the transmission unit that needs are transmitted carries out transmitting and scheduling;

Sending module: be used for sending transmission unit according to described transmitting and scheduling result.

10. equipment as claimed in claim 9 is characterized in that, when being provided with scheduler module and sending module in the rlc layer of sending ending equipment, described scheduler module comprises RLC scheduling sublayer module, and described sending module comprises RLC scheduling sublayer module;

RLC scheduling sublayer module: be used for control PDU with the transmitting terminal rlc layer and have precedence over business datum and insert in the RLC data PDU; And/or the control PDU of transmitting terminal rlc layer carried out priority scheduling;

RLC sends submodule: the RLC data PDU that is used for carrying control PDU transfers to the MAC layer; And/or the control PDU of priority scheduling transferred to the MAC layer.

11. equipment as claimed in claim 9 is characterized in that, when being provided with scheduler module and sending module in the MAC of the sending ending equipment layer, described scheduler module comprises MAC scheduling sublayer module, and described sending module comprises that MAC sends submodule;

MAC scheduling sublayer module: be used for the preferential RLCPDU that contains control information and be multiplexed with MAC PDU with transmitting terminal MAC layer;

MAC sends submodule: be used for that MAC PDU is sent to the HARQ entity and carry out physical layer transmission.

12., it is characterized in that described equipment also comprises as claim 9 or 10 or 11 described equipment:

Request module: be used for when the transport block transmission failure that comprises control information, request transmitting terminal upper strata retransmits the transmission unit that comprises control information.

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