KR20100116115A - Method for transmitting scheduling information based on the type of logical channel - Google Patents

Abstract

PURPOSE: A method for transmitting scheduling information according to a logical channel type is provided to prevent a terminal from transmitting unnecessary scheduling information. CONSTITUTION: When transmission data is not in a buffer of a terminal, scheduling information for releasing E-DCH(Enhanced Dedicated Channel) wireless resources is triggered. When a resource area is enough, the terminal transmits an MAC(Medium Access Control) i PDU(Protocol Data Unit) including the scheduling information to a base station. When a logical channel is a DCCH or a DTCH, the terminal transmits the MAC PDU including the scheduling information to the base station after triggering the scheduling information.

Description

Scheduling information transmission method according to logical channel type {METHOD FOR TRANSMITTING SCHEDULING INFORMATION BASED ON THE TYPE OF LOGICAL CHANNEL}

The following description relates to a communication method between a terminal and a base station in a mobile communication system, and more particularly, to a scheduling information transmission method according to a logical channel type and a scheduling method of a base station.

The UMTS (Universal Mobile Telecommunications System) to which the present invention is applied will be described below.

1 is a diagram illustrating a network structure of a UMTS.

The UMTS is composed of a user equipment (UE), a UTMS Terrestrial Radio Access Network (UTRAN), and a core network (CN). The UTRAN consists of one or more Radio Network Sub-systems (RNS), each RNS having one Radio Network Controller (RNC) and one or more base stations managed by the RNC. It is composed of One or more cells exist in one base station.

2 is a diagram showing the structure of a radio protocol used in UMTS.

The radio protocol layers exist in pairs in the terminal and the UTRAN, and are responsible for data transmission in the radio section. Referring to each of the radio protocol layers, first, the PHY layer (or physical layer), which is the first layer, serves to transmit data in a radio section using various radio transmission technologies. The PHY layer is responsible for reliable data transmission in the radio section. The PHY layer and the upper layer MAC layer are connected through a transport channel, and the transport channel is divided into a dedicated transport channel and a common transport channel according to whether the channel is shared.

The second layer includes a medium access control (MAC), a radio link control (RLC), a packet data convergence protocol (PDCP), and a broadcast / multicast control (BMC) layer. First, the MAC layer serves to map various logical channels to various transport channels, and also plays a role of logical channel multiplexing to map several logical channels to one transport channel. The MAC layer is connected to the upper layer RLC layer by a logical channel, and the logical channel includes a control channel for transmitting information of a control plane according to the type of information to be transmitted. It is divided into a traffic channel that transmits user plane information.

The MAC layer may include a MAC-b sublayer, a MAC-d sublayer, a MAC-c / sh sublayer, a MAC-hs / ehs sublayer, and a MAC-e / es according to the type of a transport channel to be managed in detail. Or MAC-i / is sublayer. The MAC-b sublayer is responsible for management of a broadcast channel (BCH), which is a transport channel for broadcasting system information, and the MAC-c / sh sublayer is a forward access channel shared with other terminals. The common transport channel is managed, and the MAC-d sublayer manages a dedicated channel (DCH) or a dedicated dedicated channel (E-DCH), which is a dedicated transport channel for a specific UE. In addition, in order to support high-speed data transmission in the downward and upward directions, the MAC-hs / ehs sublayer manages HS-DSCH (High Speed Downlink Shared Channel), which is a transport channel for high-speed downlink data transmission, and provides MAC-e / es or The MAC-i / is sublayer manages an enhanced dedicated channel (E-DCH), which is a transport channel for high-speed uplink data transmission.

The RLC layer is in charge of guaranteeing QoS of each radio bearer (RB) and thus transmitting data. RLC has one or two independent RLC entities per RB to guarantee its own QoS. To support various QoS, TM (Transparent Mode) and UM (Unacknowledged Mode) are supported. And three RLC modes, namely, AM (Acknowledged Mode). In addition, the RLC adjusts the data size so that the lower layer is suitable for transmitting data in the wireless section. The RLC also divides and connects data received from the upper layer.

The PDCP layer is located above the RLC layer, so that data transmitted using an IP packet such as IPv4 or IPv6 can be efficiently transmitted in a radio section having a relatively low bandwidth. To this end, the PDCP layer performs a header compression function, which transmits only necessary information in a header portion of data, thereby increasing transmission efficiency of a wireless section. The PDCP layer exists mainly in the PS domain because header compression is a basic function. There is one PDCP entity per RB to provide effective header compression for each PS service. In addition, when the PDCP layer exists in the CS domain, header compression is not provided.

In addition, in the second layer, a BMC (Broadcast / Multicast Control) layer is located above the RLC layer to perform a function of scheduling a cell broadcast message and broadcasting to terminals located in a specific cell.

The RRC (Radio Resource Control) layer located at the bottom of the third layer is defined only in the control plane and controls the parameters of the first and second layers in connection with the setup, reset and release of the RBs, and also the logic. Responsible for controlling channels, transport channels, and physical channels. In this case, the RB refers to a logical path provided by the first and second layers of the radio protocol for data transmission between the UE and the UTRAN, and in general, the establishment of the RB means a radio protocol required to provide a specific service. The process of defining the characteristics of the layer and the channel and setting each specific parameter and operation method.

The NAS (Non Access Stratum) layer located on top of the third layer is largely divided into a mobility management (MM) entity and a connection management (CM) entity. The MM entity is divided into a temporary mobile subscriber identity (TMSI) reassignment process, an authentication process, a terminal identification process, and an international mobile subscriber identity (IMSI) attachment process. In addition, the MM entity manages the location information of the current terminal through the location information update process. The CM entity provides and controls the services provided by the network. Accordingly, the CM entity may establish, manage, terminate and provide Short Message Serving (SMS), control or supplementary service connection, establish, manage, terminate, etc. connection establishment, management, termination, and data communication of voice calls. Follow the process of.

Both RRC and NAS messages are sent via a logical path called SRB (Signalling Radio Bearer). SRB # 0 is used to transmit all RRC messages sent on the CCCH logical channel. SRB # 1, # 2, # 3, and # 4 are all used to transmit all RRC or NAS messages sent over the DCCH logical channel. SRB # 1 and # 2 transmit RRC messages, and SRB # 3 and # 4 transmit NAS messages.

Hereinafter, the E-DCH will be described in detail.

The E-DCH is a transport channel used by one UE to transmit high speed data to Node B of the UTRAN. E-DCH uses techniques such as Hybrid ARQ (HARQ), Adaptive Modulation and Coding (AMC), and Node B Control Scheduling (Node B Control Scheduling) to transmit data at high speed. For the E-DCH, Node B transmits downlink control information for controlling the E-DCH transmission of the terminal to the terminal. The downlink control information includes ACK / NACK for HARQ, channel quality information for AMC, E-DCH transmission power allocation information for Node B control scheduling, and the like. Meanwhile, the terminal transmits uplink control information to the Node B. The uplink control information includes E-DCH UE Buffer Status Information, UE Power Status Information, Payload Size through E-TFCI, Number of Retransmission for Node B Control Scheduling, Terminal power surplus status report and the like.

E-DCH transmission of the UE is controlled by the Node B. The E-DCH control of the Node B is performed by a scheduler, and serves to allocate an optimal radio resource to each terminal. To this end, the terminal transmits information such as the amount of available power available for the E-DCH or the amount of data that the terminal intends to transmit through the scheduling information, and the network scheduler allocates radio resources to the terminal. The radio resource is allocated in consideration of the situation and scheduling information of the terminal. The allocation of radio resources informs grant information (Grant) to use a certain amount of power to each terminal through the E-AGCH channel. The E-AGCH channel is CRC masked with a unique identifier of each terminal, and the terminal masks the corresponding E-AGCH with its identifier and recognizes it as its own authorization information if there is no CRC error.

3 is a diagram illustrating a configuration of scheduling information transmitted from a terminal to a network.

Description of each of the parameters (UPH, TEBS, HLBS, HLID) constituting the scheduling information shown in FIG. 3 is as follows. UE power headroom (UPH) represents the amount of power currently being used compared to the maximum amount of power the terminal can use, which indicates the amount of available power that the terminal can use for the E-DCH. Total E-DCH Buffer Status (TEBS) informs the total amount of data a UE is waiting to transmit in RLC and MAC layers in byte units. HLBS (Highest priority Logical channel Buffer Status) tells the amount of data of the logical channel with the highest priority in the total amount of data to be transmitted by the terminal, HLID (Highest priority Logical channel ID) has the data to be transmitted This indicates the logical channel with the highest priority among the logical channels.

The terminal triggers scheduling information when data to be newly transmitted to the terminal is generated, when data to be transmitted to a logical channel having a higher priority than a logical channel having data waiting to be transmitted is generated or periodically reaches a predetermined time. This is used by the terminal to inform the network of the buffer status and available power of the terminal so that the network can efficiently allocate the appropriate radio resources to the terminal. In addition, the terminal transmits scheduling information when HARQ transmission of the MAC PDU including the scheduling information fails. This is used when the network does not properly receive the corresponding MAC PDU including scheduling information. At this time, the network entity that receives the scheduling information is a MAC-i entity, which exists in the NodeB. Finally, when the common E-DCH is used, the terminal triggers scheduling information to inform the release of the allocated radio resource when there is no data to transmit to the terminal, that is, when TEBS = 0. The terminal generates and transmits the MAC-i PDU including the scheduling information triggered when the MAC-i PDU is generated in the MAC-i entity.

As described above, the triggering of the uplink scheduling information in the current terminal is performed to cancel or change the radio resource allocated to the terminal regardless of the logical channel type.

However, when the transmission channel transmission scheme according to the logical channel type is described in detail, even if the scheduling information is not transmitted to the logical channel of the feature type, the base station can recognize the scheduling and perform power consumption, thereby preventing power consumption of the terminal. Uplink signaling overhead can be reduced.

In one aspect of the present invention for solving the above problems, in a method of transmitting a signal to a base station by a terminal, a logical channel signal to be transmitted using a radio resource statically allocated to the base station is a first type logical channel signal When a change is necessary for the statically allocated radio resource allocation, a transmission channel signal including scheduling information for changing the statically allocated radio resource and the first type logical channel signal is configured and transmitted to the base station. Making; And a second type logical channel signal when a logical channel signal to be transmitted using a radio resource statically allocated to the base station is a second type logical channel signal, and when a change is necessary for the statically allocated radio resource allocation. Constructing a transmission channel signal and transmitting the signal to the base station, wherein the transmission channel signal including the second type logical channel signal does not include scheduling information for changing the statically allocated radio resource; We propose a transmission method.

In this case, the statically allocated radio resource may be a common E-DCH (Common E-DCH) radio resource, and when the statically allocated radio resource needs to be changed, the entire E-DCH buffer state (TEBS) of the terminal. = 0) may be zero.

In addition, the scheduling information for changing the statically allocated radio resource may be scheduling information for requesting release of the common E-DCH radio resource.

In addition, the first type logical channel may include a DCCH and DTCH, and the second type logical channel may include a CCCH.

In a more specific embodiment, when the logical channel signal to be transmitted using the common E-DCH radio resource is the DCCH or the DTCH, and the total E-DCH buffer status (TEBS = 0) of the terminal indicates 0, the terminal A transmission channel signal including scheduling information for requesting release of the common E-DCH radio resource together with the DCCH or the DTCH may be configured and transmitted to the base station. In addition, when a logical channel signal to be transmitted using a common E-DCH radio resource is the CCCH, and the total E-DCH buffer state (TEBS = 0) of the UE indicates 0, the UE includes the CCCH but the common channel is used. A transport channel signal that does not include scheduling information for requesting release of an E-DCH radio resource may be configured and transmitted to the base station.

The CCCH of the transport channel signal including the CCCH but not including the scheduling information for requesting release of the common E-DCH radio resource may be an undivided CCCH signal.

On the other hand, in another aspect of the present invention for solving the above problems, in the method for the base station receives a signal from the terminal, scheduling information and first type logic for changing the radio resources statically allocated from the terminal When receiving a transmission channel signal including a channel signal, performing scheduling to change the statically allocated radio resource; And when the transmission channel signal including the second type logical channel is received from the terminal, the scheduling information for changing the statically allocated radio resource is received, the scheduling is performed to change the statically allocated radio resource. A signal receiving method of a base station is provided.

In this case, the statically allocated radio resource may be a common E-DCH (Common E-DCH) radio resource, and the scheduling information for the change to the statically allocated radio resource is the entire E-DCH buffer state ( It may indicate that TEBS = 0) is zero.

In addition, the scheduling for changing the statically allocated radio resource may be a scheduling for releasing the common E-DCH radio resource.

In addition, the first type logical channel may include a DCCH and DTCH, and the second type logical channel may include a CCCH.

In addition, when the base station receives the transmission channel signal including the CCCH, the base station may additionally perform a step of checking whether the transmission channel including the CCCH is divided, wherein the CCCH in the transmission channel including the CCCH is If not divided, scheduling may be performed to change the statically allocated radio resource.

On the other hand, in another aspect of the present invention, a terminal device for transmitting a signal to a base station, comprising: an RLC layer module for generating a first type logical channel signal or a second type logical channel signal according to a transmission signal; An E-DCH buffer, receiving one or more of the first type logical channel signal and the second type logical channel signal from the RLC layer module, and storing the one or more statically allocated radio resources in the E-DCH buffer; A MAC layer module for configuring a transmission channel signal including the first type logical channel signal or the second type logical channel signal as a logical channel signal to be transmitted using; And a physical layer module configured to receive the transport channel signal from the MAC layer module and transmit the transport channel signal to the base station, wherein the MAC layer module transmits a logical channel signal to be transmitted using the statically allocated radio resource. Is a first type logical channel signal, and when a change is required for the statically allocated radio resource allocation, a transport channel including scheduling information for changing the statically allocated radio resource and the first type logical channel signal A logical channel signal to be transmitted using the statically allocated radio resource is the second type logical channel signal, and when the statically allocated radio resource allocation needs to be changed, the second type logical channel signal Including but not including scheduling information for changing the statically allocated radio resource Proposes the terminal device is configured to configure the transmission channel signal.

In another aspect of the present invention, in a base station apparatus for receiving a signal from a terminal, a first type transmission including scheduling information for changing a radio resource statically allocated from the terminal and a first type logical channel signal A physical layer module for receiving a second type transmission channel signal that does not include a channel signal or scheduling information for changing the statically allocated radio resource but includes a second type logical channel; And a scheduler configured to perform scheduling for changing the statically allocated radio resource according to the reception of the scheduling information of the first type transport channel signal or the reception of the second type transport channel signal. .

According to the present invention as described above it is possible to prevent the terminal from transmitting unnecessary scheduling information, it is possible to effectively prevent unnecessary resource waste in terms of the network.

1 is a diagram illustrating a network structure of a UMTS.
2 is a diagram showing the structure of a radio protocol used in UMTS.
3 is a diagram illustrating a configuration of scheduling information transmitted from a terminal to a network.
4 is a diagram for explaining a MAC PDU transmission scheme.
5 is a diagram for describing a method of transmitting a first type logical channel.
6 is a diagram for describing a method of transmitting a second type logical channel.
7 is a view for explaining a signal transmission method of a terminal according to an embodiment of the present invention.
8 is a diagram for explaining a scheduling method of a base station according to an embodiment of the present invention.
9 is a diagram for describing a form in which logical channels in a transport channel are divided.
FIG. 10 is a diagram illustrating a scheduling method of a base station when a partitioning function is applied to a first type logical channel according to an embodiment of the present invention.
11 is a view for explaining a device configuration of a terminal or a base station according to an embodiment of the present invention.
12 is a diagram for describing a processor configuration of a terminal according to an embodiment of the present invention.
13 is a diagram illustrating a processor configuration of a base station according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following detailed description, together with the accompanying drawings, is intended to illustrate exemplary embodiments of the invention and is not intended to represent the only embodiments in which the invention may be practiced. The following detailed description includes specific details in order to provide a thorough understanding of the present invention. However, one of ordinary skill in the art appreciates that the present invention may be practiced without these specific details. For example, the following detailed description will be described in detail on the assumption that the mobile communication system is a 3GPP system, but is applicable to any other mobile communication system except for the specific matter of 3GPP.

In some instances, well-known structures and devices may be omitted or shown in block diagram form centering on the core functions of the structures and devices in order to avoid obscuring the concepts of the present invention. In addition, the same components will be described with the same reference numerals throughout the present specification.

In the following description, it is assumed that the UE collectively refers to a mobile stationary or stationary user equipment such as a UE (User Equipment) and an MS (Mobile Station). In addition, it is assumed that the base station collectively refers to any node of the network side that communicates with the terminal, such as Node B, eNode B, Base Station.

Hereinafter, a transmission channel according to a logical channel type, specifically, a MAC PDU transmission process will be described in detail to achieve the above object.

4 is a diagram for explaining a MAC PDU transmission scheme.

The UE generates a PDU in the RLC layer when data to be transmitted is generated, and the RLC PDU may be received in the MAC layer (S401). When the MAC layer receives the RLC PDU, the UE may perform an L1 random access procedure (S402). Specifically, the terminal performing the L1 random access procedure transmits the preamble until the network receives the preamble message, and if the terminal transmits the preamble more than the maximum number of preamble transmissions, the L1 random access procedure is considered to have failed. can do. If the network receives the preamble message transmitted by the terminal, the network may inform the terminal that the preamble message has been successfully received. If the UE successfully knows that the corresponding preamble message has been received by the base station, the UE may consider that the L1 random access procedure is successful.

Thereafter, the UE may transmit data using a common E-DCH transport channel. In this case, the logical channel transmission scheme may be different depending on whether the corresponding logical channel is a CCCH logical channel (first type logical channel), a DCCH or DTCH logical channel (second type logical channel). Hereinafter, a transmission scheme of the CCCH logical channel (first type logical channel) and a transmission scheme of the DCCH / DTCH logical channel (second type logical channel) will be described. Hereinafter, a type of a logical channel is divided into a first type and a second type, and a case of a CCCH as a first type logical channel and a DCCH or DTCH as a second type logical channel will be described as an example. Any logical channel may correspond to the first type or the second type logical channel as long as it is satisfied.

5 is a diagram for describing a method of transmitting a first type logical channel.

When the terminal transmits data through the CCCH logical channel, since the terminal is not yet connected to the network, the terminal may transmit a higher message in accordance with the initial grant information transmitted by the network in all cells. That is, when the amount of resources corresponding to the authorization information value received from the network is larger than the size of the received MAC segment or not included in the MAC PDU previously transmitted through the segmentation process (S501). In operation S502, the MAC i PDU including the received RLC PDU or the remaining MAC fragment may be generated and transmitted to the base station. However, when the amount of resources according to the grant information value is smaller than the received RLC PDU or MAC fragment, segmentation of the received RLC PDU or MAC fragment is performed (S502), and the MAC i PDU including a part of the divided signal is determined. It can be generated and transmitted to the base station (S503). For the remaining MAC fragments not included in the MAC i PDU in step S503, the above-described process may be repeated through step S501 in the next TTI (S504).

The CCCH logical channel signal is generally small in size and can be transmitted through one MAC PDU. Therefore, one embodiment of the present invention proposes not to perform a partitioning process for a CCCH logical channel. Accordingly, the process of transmitting the CCCH can be simplified. As described below, when the base station receives the CCCH, the common E-DCH radio resource release can be performed without checking the partition state. If splitting is not performed during CCCH transmission, steps S501 to S504 are omitted in FIG. 5, and a MAC i PDU including a CCCH may be immediately generated by step S505.

6 is a diagram for describing a method of transmitting a second type logical channel.

As described above, the upper RRC message through the logical channel may be transmitted in one message in one MAC PDU, or may be transmitted in one or more MAC PDUs. Accordingly, when the terminal transmits the DCCH or DTCH logical channel, the terminal may receive the grant information from the network and transmit higher data according to the grant information. This authorization information can be received through the E-AGCH, which is masked by the E-RNTI that distinguishes each terminal, the terminal continuously monitors the E-AGCH (S601), the E-AGCH is It may be determined whether it is masked with its E-RNTI (S602). If the E-AGCH masked by its E-RNTI is received, the UE may transmit data using the authorization information value indicated by the corresponding E-AGCH (S603 to S604). If the E-AGCH masked by its own E-RNTI is not received, the UE may continue to monitor the E-AGCH (S601).

As described above, data transmission through the DCCH or DTCH logical channel may be divided into several MAC-i PDUs. That is, when the size of the MAC fragment remaining after the split or the received RLC PDU is larger than the resource size corresponding to the authorization information value (S603), the MAC fragment or the RLC PDU is split (S604). A MAC i PDU including a fragment or a part of the RLC PDU may be generated and transmitted to the base station (S605).

On the other hand, if the received E-AGCH includes information indicating the public E-DCH radio resource cancellation (indicated in the INACTIVE in Figure 6), the UE transmits the MAC i PDU including the last data (S610), E-DCH radio resource release may be performed (S611). However, if the received E-AGCH does not include INACTIVE, the UE may configure a MAC i PDU including information stored in the E-DCH buffer and transmit it to the base station (S608).

As shown in FIG. 5, in the case of CCCH transmission, when the UE completes transmission of one message, the transmission is completed through the corresponding common E-DCH radio resource. On the other hand, as shown in FIG. 6, in case of DCCH / DTCH transmission, MAC PDU transmission is continued through the common E-DCH radio resource until the network commands the release of the common E-DCH radio resource.

That is, when the terminal, which is one of uplink scheduling information trigger conditions, transmits the last data and there is no data in its own buffer (that is, when TEBS = 0), when the terminal transmits the CCCH data, the terminal uses the common E. While it is assumed that there is no data to be transmitted through the DCH transmission channel any more, when the transmission is performed using DCCH or DTCH data, the UE continuously waits for receiving other data.

Therefore, in one embodiment of the present invention, when a specific type of logical channel is transmitted according to the type of logical channel, the statically allocated radio resource change is notified to the terminal in a situation where the statically allocated radio resource should be changed. The present invention proposes a method for scheduling a radio resource change statically allocated through a type of a logical channel, without transmitting separate scheduling information. Herein, the "statically allocated radio resource" includes a radio resource that the terminal can continuously use until the network issues a release command, such as the above-described common E-DCH radio resource. That is, in the following description, the "statically allocated radio resource" mainly describes the case of a common E-DCH radio resource. However, the present invention is not limited thereto, and the terminal does not receive another scheduling command from the network. As long as the radio resources are continuously available, they can be collectively referred to.

Hereinafter, a signal transmission method of a terminal and a scheduling method of a base station according to the above-described embodiment will be described in detail.

7 is a view for explaining a signal transmission method of a terminal according to an embodiment of the present invention.

As shown in the left side of FIG. 7, when there is no more data to be transmitted in the buffer of the existing UE (TEBS = 0), scheduling information (SI) for releasing the common E-DCH radio resource is triggered. If there is room in the resource region to include the information, the MAC i PDU including the scheduling information is generated and transmitted to the base station. If there is no room in the resource region to include the triggered scheduling information, the triggered scheduling information is separately transmitted to the supporting station.

On the other hand, in the terminal according to the present embodiment, when there is no more data to be transmitted in the buffer of the terminal (TEBS = 0), it is determined whether the type of logical channel to be transmitted is a first type logical channel or a second type logical channel. The step can be further performed. If the logical channel to be transmitted is a first type logical channel (eg, CCCH), the terminal may transmit a transport channel (MAC PDU) including the logical channel to the base station without triggering scheduling information. On the other hand, if the logical channel to be transmitted is a second type logical channel (for example, DCCH or DTCH), the UE triggers scheduling information for requesting release of the common E-DCH radio resource as before, and includes corresponding scheduling information as well. The MAC PDU may be transmitted to the base station. Of course, if there is not enough space to transmit, including the corresponding scheduling information, the triggered scheduling information may be separately transmitted to the base station.

8 is a diagram for explaining a scheduling method of a base station according to an embodiment of the present invention.

When the base station according to the prior art receives a transmission channel (MAC PDU) from the terminal, it is determined whether the scheduling information in the received MAC PDU is included, and the scheduling information in the received MAC PDU indicates the TEBS = 0 of the terminal Process the received MAC PDU and perform common E-DCH radio resource release. In contrast, when the base station according to the present embodiment receives the MAC PDU from the terminal, it is proposed to further determine whether the received MAC PDU includes the first type logical channel or the second type logical channel. If the logical channel information in the received MAC PDU is a first type logical channel (for example, CCCH), the base station may instruct to release the shared E-DCH radio resource allocated to the terminal even though there is no scheduling information.

In the above-described embodiment with reference to FIGS. 7 and 8, the case in which the scheduling information is triggered in the terminal has been described as a case where TEBS = 0. However, the present invention is not limited thereto. In certain cases, depending on the type of the logical channel under the information triggering condition, it may be applied in a manner that does not trigger scheduling information or does not transmit triggered scheduling information.

Table 1 below shows various conditions under which scheduling information is triggered in the terminal.

Scheduling Information Triggering Conditions -When data to be newly transmitted to the terminal occurs -When data is to be transmitted to a logical channel with higher priority than the logical channel with data waiting to be transmitted When HARQ transmission of MAC PDU including data and scheduling information fails -When the regular time has come

In the above-described embodiment, it has been described on the assumption that the division function is not applied to the first type logical channel CCCH. However, in the case of CCCH, a case in which different types of degrees are combined and transmitted according to system conditions is also discussed. In this case, the size of the CCCH to be transmitted may be increased and thus splitting may occur. Therefore, the following description will be given of the case where partitioning is applied to the first type logical channel (CCCH) according to another embodiment of the present invention.

9 is a diagram for describing a form in which logical channels in a transport channel are divided. Specifically, FIG. 9 illustrates a partitioning function within a MAC-is entity existing in the UE and the network RNC when transmitting the MAC-i PDU through the common E-DCH transport channel.

A MAC-is PDU consists of MAC-is SDUs transmitted on one or more of the same logical channels. A MAC-is PDU transmitted by a MAC may transmit a lot of data or a small MAC-is PDU according to a wireless environment. Accordingly, a higher MAC-is SDU may be divided into one MAC-is PDU according to a wireless environment, or several MAC-is SDUs may exist in one MAC-is PDU. Therefore, in the MAC-is header, segmentation status (SS) consisting of 2 bits in the MAC-is PDU is provided to inform the combination information on how the upper MAC-is SDU configures the MAC-is PDU. exist. 9 shows an example of how upper MAC-is SDUs are configured as MAC-is PDUs.

As shown in FIG. 9, when one MAC-is SDU is configured as one MAC-is PDU, it is assumed that the partition state information indicates “00”. In addition, it is assumed that the partition status information is "01" when the first MAC-is SDU of the MAC-is PDU is the last segment of the MAC-d PDU or the MAC-c PDU. For example, when the UE transmits the RRC CONNECTION REQUEST message through the CCCH logical channel, when the message is configured with one MAC-is PDU, the partition status information is “00” and is configured with one or more MAC-is PDUs. If so, the split state information may be "01".

For reference, when the MAC-i PDU transmits data through a wireless channel through the PHY layer, the MAC PDU (or a transmission block, referred to as TB) size and power consumption of the terminal will be described. The UE may have an E-TFCI table according to the size of the MAC PDU. The MAC layer may select the most appropriate MAC PDU according to the E-TFCI selection process. This may be changed according to the buffer amount of the terminal and the amount of power that the terminal can transmit.

E-TFCI 15 16 17 18 19 20 TB size (bits) 199 206 214 222 230 238

As shown in Table 2, the E-TFCI index is configured for each MAC PDU size. The power offset compared to the pilot signal informed by the UE for each E-TFCI index is different. The smaller the E-TFCI index, the terminal transmits data using less power.

FIG. 10 is a diagram illustrating a scheduling method of a base station when a partitioning function is applied to a first type logical channel according to an embodiment of the present invention.

The method according to the embodiment shown in FIG. 10 receives a MAC PDU from the terminal similarly to the case of FIG. 8, and determines whether the logical channel is CCCH when there is no scheduling information in the received MAC PDU. Although the base station according to the embodiment described above with reference to FIG. 8 processes the MAC PDU and releases the common E-DCH radio resource without determining partition information when the logical channel received through the MAC PDU is CCCH, the present embodiment The base station according to the present invention proposes to additionally check the split state information (SS) when the received logical channel is CCCH. If the split state information indicates "00" or "01" (see Fig. 9), the base station processes the received MAC PDU and releases the common E-DCH radio resource. However, when the split state information is not "00" or "01", it may be determined that the entire CCCH information is not received, and the common E-DCH radio resource release may not be performed.

The embodiment described above with reference to FIG. 10 is suitable for application in the case of transmitting a long length CCCH by combining other information with the CCCH.

Hereinafter, a configuration of a terminal and a base station apparatus for performing the above operation will be described.

11 is a view for explaining a device configuration of a terminal or a base station according to an embodiment of the present invention.

The apparatus 50 shown in FIG. 11 may be a terminal or a base station described in the above embodiments. When the device 50 is a terminal device, the E-DCH buffer (not shown) may be configured inside the processor 51 or may be configured as part of the memory 52 functionally / logically connected to the processor 51.

The device 50 may include a processor 51, a memory 52, a radio frequency unit (RF unit) 53, a display unit 54, and a user interface unit 55. Layers of the air interface protocol are implemented in the processor 51. The processor 51 provides a control plane and a user plane. The function of each layer may be implemented in the processor 51, which will be described below in more detail. Memory 52 is coupled to processor 51 to store operating systems, applications, and general files.

If the device 50 is a terminal, the display unit 54 may display a variety of information and use well-known elements such as a liquid crystal display (LCD) and an organic light emitting diode (OLED). The user interface unit 55 may be composed of a combination of well known user interfaces such as a keypad, a touch screen, and the like. The RF unit 53 may be connected to the processor 51 to transmit and receive a radio signal. The RF unit 53 may be divided into a transmission module and a reception module.

Hereinafter, the configuration of the processor of the terminal and the base station of the above-described device configuration in more detail.

12 is a diagram for describing a processor configuration of a terminal according to an embodiment of the present invention.

The processor of the terminal may largely include an RLC layer module 1201, a MAC layer module 1202, and a physical layer module 1203. The RLC layer module 1201 may generate a specific type of logical channel signal according to a transmission signal to be transmitted to the base station. For example, when the terminal in the idle mode (idle mode) wants to perform the RRC connection request with the base station, the RLC layer module may configure the CCCH SDU and deliver it to the MAC layer module 1202. The MAC layer module 1202 of the terminal according to the present embodiment may include an E-DCH buffer 1204. The E-DCH buffer may be used to store a logical channel signal (eg, CCCH SDU) received from the RLC layer module, and then map the transmission channel signal (MAC PDU) to the base station.

The physical layer module 1203 may receive a transport channel signal (MAC PDU) from the MAC layer module 1202 and transmit the transport channel signal to a base station. The transmission channel signal may be transmitted through the physical channel through channel coding, modulation, etc. in the physical layer module 1203.

In the MAC layer module 1202 of the terminal according to the present embodiment, a logical channel signal to be transmitted using a statically allocated radio resource is a first type logical channel signal (for example, DCCH or DTCH), and a statically allocated radio resource. If the allocation requires a change (for example, if a common E-DCH radio resource release is required), the transmission channel signal including the scheduling information for changing the statically allocated radio resource and the first type logical channel signal The logical channel signal to be transmitted using a statically allocated radio resource is a second type logical channel signal (e.g., CCCH), and when a change is required to the statically allocated radio resource allocation (e.g., A common type of E-DCH radio resource release), including the second type logical channel signal, and scheduling information for changing the statically allocated radio resource. Characterized in that is configured to configure the transmission channel signals that do not also. That is, the MAC layer module 1202 of the terminal according to the present embodiment may or may not trigger scheduling information according to the type of logical channel to be transmitted.

13 is a diagram illustrating a processor configuration of a base station according to an embodiment of the present invention.

The processor of the base station according to the present embodiment can largely include a physical layer module 1301 and a MAC layer module 1302. The physical layer module 1301 is a first type transport channel signal including scheduling information for changing a statically allocated radio resource from a terminal (for example, release of a common E-DCH radio resource) and a first type logical channel signal. Or a second type transport channel signal that does not include scheduling information for changing a statically allocated radio resource but includes a second type logical channel. As such, when the transport channel (MAC PDU) is received by the physical layer module 1301, it may be delivered to the MAC layer module 1302. The MAC layer module 1302 may perform a scheduling operation as shown in FIG. 8 or 10. That is, even if the MAC PDU does not include scheduling information according to the type of logical channel included in the received MAC PDU, scheduling for changing the statically allocated radio resource may be performed. Therefore, the required scheduling operation may be performed only when the partition state information indicates that the last part of the logical channel is transmitted in the corresponding MAC PDU.

The detailed description of the preferred embodiments of the invention disclosed as described above is provided to enable any person skilled in the art to make and practice the invention. While the foregoing has been described with reference to preferred embodiments of the present invention, those skilled in the art will variously modify and change the present invention without departing from the spirit and scope of the invention as set forth in the claims below. I can understand that you can. Accordingly, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Although the above-described signal transmission and reception technique and a terminal and base station structure for the same have been described with reference to the example applied to the 3GPP system, it is possible to apply to other various mobile communication systems having a similar process in addition to the 3GPP system.

Claims (14)

In a method for transmitting a signal to a base station,
When a logical channel signal to be transmitted using a radio resource statically allocated to the base station is a first type logical channel signal and a change is required for the statically allocated radio resource allocation, Constructing a transmission channel signal including scheduling information and the first type logical channel signal and transmitting the same to the base station; And
The logical channel signal to be transmitted by using the radio resources statically allocated to the base station is a second type logical channel signal, and when the static resource allocation is required to be changed, transmission including the second type logical channel signal. Constructing a channel signal and transmitting it to the base station;
The transmission channel signal including the second type logical channel signal does not include scheduling information for changing the statically allocated radio resource. The method of claim 1,
The statically allocated radio resource is a common E-DCH (Common E-DCH) radio resource,
The change of the statically allocated radio resource includes the case where the total E-DCH buffer state (TEBS = 0) of the terminal is 0. The signal transmission method of the terminal. The method of claim 2,
The scheduling information for changing the statically allocated radio resource is scheduling information for requesting release of the common E-DCH radio resource. The method of claim 1,
The first type logical channel includes a DCCH and a DTCH,
The second type logical channel includes a CCCH. The method of claim 4, wherein
If a logical channel signal to be transmitted using a common E-DCH radio resource is the DCCH or the DTCH, and the total E-DCH buffer state (TEBS = 0) of the UE indicates 0, the UE is connected to the DCCH or the DTCH. And together with a transmission channel signal comprising scheduling information for requesting release of the common E-DCH radio resource, transmitting the signal to the base station. The method of claim 4, wherein
If the logical channel signal to be transmitted using the common E-DCH radio resource is the CCCH, and the total E-DCH buffer state (TEBS = 0) of the UE indicates 0, the UE includes the CCCH but the common E- A method of transmitting a signal by a terminal comprising constructing a transmission channel signal not including scheduling information for requesting DCH radio resource release and transmitting the same to the base station. The method according to claim 6,
The CCCH of the transmission channel signal including the CCCH, but does not include scheduling information for requesting the release of the common E-DCH radio resources, the signal transmission method of the terminal. In the method for receiving a signal from the base station,
Performing scheduling for changing the statically allocated radio resource when receiving the transmission channel signal including the first type logical channel signal and the scheduling information for changing the statically allocated radio resource from the terminal; And
When receiving a transmission channel signal including a second type logical channel but not including scheduling information for changing a statically allocated radio resource from the terminal, performing scheduling for changing the statically allocated radio resource Method of receiving a signal of a base station, comprising the step. The method of claim 8,
The statically allocated radio resource is a common E-DCH (Common E-DCH) radio resource,
The scheduling information for changing the statically allocated radio resource indicates a case in which the total E-DCH buffer state (TEBS = 0) of the terminal is 0. The method of claim 9,
And the scheduling for changing the statically allocated radio resource is a scheduling for releasing the common E-DCH radio resource. The method of claim 8,
The first type logical channel includes a DCCH and a DTCH,
And the second type logical channel comprises a CCCH. The method of claim 11,
When the base station receives a transmission channel signal including the CCCH, the base station further performs a step of checking whether the transmission channel including the CCCH is divided,
When the CCCH in the transport channel including the CCCH is not divided, scheduling for changing the statically allocated radio resource is performed. In a terminal device for transmitting a signal to a base station,
An RLC layer module for generating a first type logical channel signal or a second type logical channel signal according to the transmission signal;
An E-DCH buffer, receiving one or more of the first type logical channel signal and the second type logical channel signal from the RLC layer module, and storing the one or more statically allocated radio resources in the E-DCH buffer; A MAC layer module for configuring a transmission channel signal including the first type logical channel signal or the second type logical channel signal as a logical channel signal to be transmitted using; And
A physical layer module configured to receive the transport channel signal from the MAC layer module and transmit the transport channel signal to the base station;
The MAC layer module,
If the logical channel signal to be transmitted using the statically allocated radio resource is the first type logical channel signal, and a change is required for the statically allocated radio resource allocation, scheduling for changing the statically allocated radio resource Construct a transport channel signal comprising information and the first type logical channel signal,
When the logical channel signal to be transmitted using the statically allocated radio resource is the second type logical channel signal, and the change is necessary for the statically allocated radio resource allocation, the logical channel signal includes the second type logical channel signal, wherein the static And a transport channel signal that does not include scheduling information for changing a radio resource allocated to the terminal. In the base station apparatus for receiving a signal from a terminal,
It does not include scheduling information for changing a statically allocated radio resource from the terminal and a first type transmission channel signal including a first type logical channel signal, or scheduling information for changing the statically allocated radio resource. A physical layer module for receiving a second type transmission channel signal comprising a second type logical channel; And
And a scheduler for performing scheduling for the change of the statically allocated radio resource in accordance with the reception of the scheduling information of the first type transport channel signal or the reception of the second type transport channel signal.

Images