Allocating radio resources in mobile communications system

Configure radio resources in mobile communication systems

The present invention relates to the configuration of radio resources in a mobile communication system.

Figure 1 shows an exemplary network structure of an evolved universal mobile telecommunications system (E-UMTS). E-UMTS is developed from the existing Universal Mobile Telecommunications System (UMTS). The E-UMTS standard is currently being developed by the Third Generation Partnership Project (3GPP). E-UMTS can also be called a long-term evolution (LTE) system.

Referring to Figure 1, an E-UMTS network can be composed of an evolved UMTS terrestrial radio access network (E-UTRAN) and a core network (CN). E-UTRAN includes a base station (eNodeB or eNB). CN includes an access gateway (AG), which is a node suitable for user registration of user equipment (UE). AG can be divided into a first part for processing user traffic and a second part for processing control traffic. The AG part for processing user traffic and the AG part for processing control traffic can be connected to each other via a communication interface. At least one or more cells may exist in a single eNode B (eNB). An interface for transmitting user traffic and/or controlling traffic can be used between multiple eNodeBs. At the same time, in the E-UMTS in Figure 1, an interface for distinguishing between E-UTRAN and CN can be used.

The radio interface protocol layer between a mobile terminal and the network can be divided into a first layer (L11), A second layer (L2), and a third layer (L3). Among these layers, the first layer uses a physical layer to provide information transfer services.

A radio resource control (RRC) layer located in the third layer is used to control the radio resources between the mobile terminal and the network. Therefore, the RRC layer allows the exchange of RRC messages between the mobile terminal and the network. The RRC layer can be located in both the eNodeB and the AG, or in one of the eNodeB and the AG.

Figures 2 and 3 show the architecture of the radio interface protocol between a terminal and a UMTS terrestrial radio access network (UTRAN) based on the 3GPP radio access network specifications. The radio interface protocol level in Figures 2 and 3 is composed of a physical layer, a data link layer, and a network layer. The radio interface protocol vertical is composed of a user plane for transmitting data information and a control plane for transmitting control signals. The protocol layers in Figures 2 and 3 can be divided into a first layer (L1) and a second layer ( L2) and a third layer (L3).

In the following, the radio protocol layer of the control plane shown in Figure 2 and the user plane shown in Figure 3 will be explained. As mentioned above, a physical layer provides information transfer services to the upper layer. The physical layer is connected to an upper layer, such as a media access control (MAC) layer, via a transmission channel. Data is transferred between the MAC layer and the physical layer via the transmission channel. Data is also transferred between different physical layers (such as a physical layer on a transmitting side and a physical layer on a receiving side).

The MAC layer is located in the second layer and provides services to an upper layer via a logical channel, such as the radio link control (PLC) layer. The RLC layer can also be positioned in the second layer and supports reliable data transmission. It should be noted that a function performed by the RLC layer can be implemented as a functional block within the MAC. In this case, the RLC layer may not exist. The PDCP layer is located in the second layer above the RLC layer. The PDCP layer is used to use IP packets (such as IPv4 or IPv6) to efficiently transmit data on a radio interface with a relatively small bandwidth. For this purpose, the PDCP layer reduces unnecessary control information through a function such as header compression.

A radio resource control (RRC) layer at the bottom of the third layer is defined in the control plane. The RRC layer processes the transmission channels and physical channels used for the configuration, reconfiguration, and release of a radio transmission. Here, a radio carrier (RB) refers to a service provided by the second layer for data transfer between mobile terminals and UTRAN.

The downlink transmission channel used to transmit data from the network to the mobile terminal can include a broadcast channel (BCH) for transmitting system information, and a downlink sharing for transmitting user traffic or a control message Channel (SCH). User traffic or control messages for downlink multicast or broadcast services can be transmitted via the downlink SCH, or via a separate downlink multicast channel (MCH). Used to transmit data from a mobile terminal to a network uplink transmission channel, which may include a random access channel (RACH) used to transmit an initial control message, and one used to transmit user traffic or a control The uplink shared channel (SCH) of the message.

In the related art, when a mobile terminal cannot connect to a gateway (ie AG) for traffic transmission, or when the mobile terminal is no longer connectable due to its actions, or when the gateway cannot be maintained due to other operations, the mobile terminal Connect to a gateway suitable for a base station in an area where the mobile terminal has moved. However, in this aspect, because environmental condition information is exchanged between gateways, and the transmission of signaling messages between many base stations and gateways and the like, changing to a new gateway will increase network traffic congestion.

The RLC layer will be explained below. The RLC layer basically guarantees a quality of service (QoS) for each RB and its corresponding data transmission. Because the RB service is a service provided by the second layer of the radio protocol to the upper layer, the entire second layer can affect the quality of service. Especially the RLC layer greatly affects the quality of service. The RLC establishes an independent RLC entity for each RB to ensure the unique service quality of the RB.

RLC provides three modes to support various service qualities, namely transparent mode (TM), unconfirmed mode (UM) and confirmed mode (AM). The three RLC modes support service quality in different ways, and adapt to different operating methods accordingly. At the same time, the detailed functions of the three operating modes are different from each other. Therefore, the operation modes of RLC (ie, TM, UM, and AM) will be explained in more detail.

In the UM RLC mode, the unreceived confirmation is for the reception of the transmitted data. In the AM RLC mode, the reception confirmation is for the reception of the transmitted data. When transmitting data in unconfirmed mode (UM), UM RLC adds a PDU header including a sequence number (SN) to each PDU, and transmits the PDU to a receiving end. Therefore, the receiving end can clearly understand which PDU was lost during transmission. UM RLC processes broadcast/multicast data on the user plane, or real-time packet data such as voice (such as VoIP), or stream transmission in the packet service domain. UM RLC handles the transmission of RRC messages on the control plane. When the RRC message is transmitted to a specific terminal in a cell or a specific terminal group in a cell, a reception confirmation is not required.

Similar to UM RLC, AM RLC configures the PDU by adding a PDU header with an SN to the PDU. However, the difference between UM RLC and AM RLC is that a receiving end confirms whether the PDU transmitted by a transmitting side has been successfully received. It should be noted that when the confirmation is provided, the receiving end can request the transmitting end to transmit another unsuccessfully received PDU. Therefore, the retransmission function is a different feature of AM RLC.

The purpose of AM RLC is to ensure error-free data transmission through the use of the retransmission function. Therefore, AM RLC handles the transmission of non-real-time packet data on the user plane, such as transmission control protocol/Internet protocol (TCP/IP) data in a packet service area. At the same time, when the RRC message is transmitted to a specific terminal or a specific terminal group in a cell, the AM RLC processes the transmission of the RRC message that requires a reception confirmation on the control plane.

TM RLC and UM RLC are used for one-way communication. However, AM RLC is used for two-way communication because of the feedback function from the receiving end. Because two-way communication is usually used for point-to-point communication, AM RLC uses a dedicated channel.

AM RLC is complicated because of its retransmission function. In particular, in addition to a transmission/reception buffer storage, the AM RLC also has a retransmission buffer for managing retransmissions. AM RLC performs various functions, including, for example, the use of a transmission/reception window for flow control; a polling function, which is used when a transmitting end requests status information from the receiving end of a peer RLC entity; and a status information reporting function, For example, when the receiving end reports its buffer status to the transmission side of the RLC entity at the same level; using a status PDU for transmitting status information; and inserting the status PDU into a data PDU to increase the burden of data transmission efficiency.

When the AM RLC entity is requested to find a critical error during operation, the AM RLC also uses a reset PDU to request the reset of all operations and parameters from the paired AM RLC entity. Therefore, a reset ACK PDU is used to respond to the reset PDU, and the like. AM RLC uses several protocol parameters, state variables and a timer to support these functions.

For example, the status information report PDU, status PDU and reset PDU PDU are used to control data transmission in AM RLC. These PDUs are called control PDUs. The PDU used to transfer user data is called a data PDU. Therefore, AM RLC generally uses two types of PDUs, data PDUs and control PDUs.

E-UMTS is equipped with a base station and a terminal. The radio resources in a cell include an uplink radio resource and a downlink radio resource. The base station manages the configuration and control of the uplink and downlink radio resources of a cell. Specifically, the base station determines the conditions or conditions, such as which terminal uses the radio resources, when to use the radio resources, the amount of radio resources used, and what types of radio resources are used. For example, after 3.2 seconds have elapsed, the base station may decide to transmit downlink data to a first user at a frequency of 100 MHz to 101 MHz for 0.2 seconds. According to the base station, the corresponding terminal is notified of the decision to allow the terminal to receive downlink data. Similarly, the base station can decide whether to transmit data based on conditions or conditions (that is, when to use radio resources, the amount of radio resources used, what types of radio resources are used, which terminal uses the radio resources, etc.). The base station also informs the terminal of the decision to allow the terminal to transmit data in the determined time period.

In the E-UTRAN system, the base station dynamically manages radio resources to increase the efficiency of data transmission. However, in the UTRAN system, the management of radio resources allows a terminal to continuously use a radio resource during a call connection period. This unreasonable reason is that various services can currently be provided based on an IP packet. For example, for most packet data services, a packet is generated intermittently rather than continuously. Therefore, the base station continuously allocates radio resources to the terminal inefficiently.

In the E-UTRAN system, when a terminal has data to be transmitted, radio resources are allocated to the terminal according to the above-mentioned mode. In other words, E-UTRAN allocates resources to the terminal only when the terminal needs radio resources. In this aspect, in order to transmit more data to more terminals while using a smaller amount of radio resources, the base station needs more information, and more stringent control and management of radio resources.

For example, if there are three terminals in a single cell, it is possible that a first terminal implements voice call communication, a second terminal implements Internet browsing, and a third terminal does not implement call communication.

When voice call communication is implemented, users of the first terminal and the other party can talk to each other at any time. However, if one voice is delayed, the conversation quality may be degraded. Therefore, for voice call communication, the base station continuously allocates a radio resource.

Regarding the second terminal for performing Internet browsing, a user of one of the terminals can, for example, read an online (Internet) newspaper. In this case, when the user's demand page is displayed on a screen, the user will view the content of the page for a certain period of time. There is no data transmission during this period. Therefore, when browsing the Internet, data is first transmitted for a short period of time. After that, the terminal enters a state without data transmission. As a result, the base station can allocate radio resources accordingly.

Regarding the user of the third terminal that does not perform call communication, the configuration of radio resources is unnecessary.

The inventors have identified at least the following problems in the existing radio resource allocation procedures. It should be noted that in the above situation, the base station allocates radio resources differently according to the specific conditions that the terminal enters. In addition, in order to provide more information to more terminals, the base station should consider the usage time of the terminal. For example, when there is no data transmission or reception, the data should be transmitted through the terminal's uplink. Similarly, the time to distinguish whether there is data to be received through the downlink should be shortened. Otherwise, it will inevitably increase the standby time of the terminal. Based on the recognition of this problem, the various features and aspects described herein have been conceived by the inventors.

This disclosure is about configuring radio resources in mobile communication systems.

The following description will propose additional features and aspects, and part of them can be understood from the description or can be learned by the implementation of these features. These features and aspects will be understood and obtained by the written description and the scope of patent application as well as the structure specially pointed out in the drawings.

In order to achieve these and other features and aspects as included and broadly described, this disclosure provides a method for configuring radio resources in a mobile communication system. The method includes transmitting first information to a network, wherein the The first information is used by the network to allocate radio resources to a mobile terminal to allow communication between the mobile terminal and the network; and the second information is received from the network, wherein the second information is related to configuration The radio resources used for the mobile terminal.

In one aspect, the first information is transmitted when a timer expires. The first information may include priority information of channels with data. In one aspect, the first information may include mobile power information. In another aspect, under a hybrid automatic repeat request (HARQ) scheme, the first information may include information about an average number of retransmissions. In a further aspect, under a header compression scheme, the first information may include information about transmitting a full-header packet. In yet another aspect, the first information may include information about transitions between an idle period and an active period.

The idle period can be a silent period, and the active period is a talk spurt during the voice call operation. The mobile terminal can periodically configure radio resources for transmitting the first information using the configured radio resources.

After receiving a request to transmit the first information from the network, the first information can be transmitted. The second information can be received from the network along with the same NACK signal, where the network transmits the NACK signal when the data is incorrectly received from the mobile terminal. The second information may include an indicator indicating the presence of the information to be paged by the mobile terminal.

The second information may be received during a first time frame of a group of time frames, wherein the first time frame includes the identification of all mobile terminals scheduled for data communication in the group of time frames. If the identification of the mobile terminal is not included in the first time frame, a mobile terminal may be in an inactive state during other time frames of the group of time frames.

In one aspect, the second information may include information about when the mobile terminal can transmit the first information. In another aspect, the second information may include information about when the network can allocate radio resources.

The first information may be transmitted on a part of a random access channel that allows the mobile terminal to use.

According to another embodiment, a method for configuring radio resources in a mobile communication system includes receiving first information from a mobile terminal, wherein the first information is used by a network to allocate radio resources to the mobile terminal , Used to allow communication between the mobile terminal and the network; and transmit second information to the mobile terminal, where the second information relates to the radio resources allocated to the mobile terminal.

It should be understood that both the above general description and the following detailed description are exemplary and explanatory, and are intended to provide further explanation of the scope of the patent application.

This disclosure relates to a method for configuring radio resources in a mobile communication system.

The features in this disclosure can be implemented in mobile communication systems such as E-UMTS. However, this can be applied to other communication systems operating under different specifications. Some exemplary specific embodiments will now be explained in detail.

The feature of this disclosure is to provide better services to mobile terminals under the control of the wireless communication system. A base station can allocate radio resources to the terminal, and the terminal can request the base station to effectively allocate the radio resources.

In order to allocate radio resources to the terminals in a single cell, the base station can obtain data to notify each terminal to wait for reception. Generally speaking, data to be transmitted in the downlink direction can be transferred from an access gateway (AG). Therefore, the base station can recognize the amount of data to be transferred to each terminal through the downlink, and allocate radio resources accordingly. In the case of uplink data, unless the terminal provides information about the data to be transferred via the uplink, the base station cannot know the amount of radio resources required by each terminal. Therefore, in order for the base station to properly allocate uplink radio resources to a terminal, the terminal can provide the base station with information about the scheduling of radio resources.

Figure 4 shows an exemplary method for configuring radio resources in a mobile communication system according to a specific embodiment. Referring to Figure 4, a terminal can transmit scheduling related information to the base station. After that, the base station can immediately allocate radio resources to the terminal, so that the terminal can use the allocated radio resources to quickly transmit data. Therefore, a method for configuring radio resources in a mobile communication system will be described.

In order to assist the base station to properly configure the uplink radio resources, the terminal transmits information about a data transmission status to the base station (S10). When a specific reference (condition) is met or at a specific time, the terminal can transmit the data transmission status information to the base station.

The data transmission status information may include information about the priority level of a channel with data, and in particular, the data transmission status information may include information about a channel with the highest priority level among the channels with data.

The data transmission status information may also include identification information for channels with data and/or tag information. The tag information may include a series of tag values assigned to each channel by the base station. The information provided by the tag value is whether a corresponding channel includes audio data or needs an error-free transmission. According to this, the base station can assign the same tag value to different channels of different terminals.

The data transmission status information may also include identification information for the channel, and the channel has the highest priority level among the channels having data and/or information about the data volume of each channel. In addition, the data transmission status information may include information about the total data volume of the channels. The information included in the data transmission status information can be transmitted to the base station alone or together with other information.

The terminal can collect information of similar levels or similar types of channels and transfer it to the base station. In addition, because the amount of power to be used in the uplink is limited, the terminal can include power information along with data transmission status information. The power information may include information about the amount of power available in addition to the power currently used for transmission, or the maximum amount of power currently available for transmission by the terminal.

Referring to Figure 4, the terminal can also provide information about a radio environment (S10) to help the base station more effectively manage radio resources in a single cell. The terminal can use a hybrid automatic repeat request (HARQ) scheme to transmit information about an average success rate or transmission failure rate to the base station. According to this, the base station can calculate the radio resource demand based on the received radio environment information to allocate it to the terminal. For example, when a HARQ retransmission procedure occurs three times on average and the terminal needs 1 MHz radio resources for transmitting uplink data, the base station can estimate that the 1 MHz radio resources should be allocated to the terminal for three time intervals.

In general, the header compression scheme is used as a packet switching-based service (PS service), in which most IP packets related to a service have almost the same header content. Therefore, when the PS service is provided, a full-header packet is transmitted every certain interval, and the changed content is transmitted during the remaining time interval. Accordingly, more uplink radio resources are required to transmit the full-header packet.

Regarding the feature of this disclosure, when the header compression scheme is used for the PS service, the terminal transmits the time information for the full header packet to the base station. The time information may include, for example, a transmission section, an interval, and time. Therefore, based on the time information, when the terminal is expected to transmit a full-header packet, the base station can allocate more resources.

In the case of voice calls, an end user does not always speak. Therefore, there will be a gap during the period when no sound data is generated. A voice encoder can generate a packet to indicate the mute interval at the beginning of one of the intervals and transmit the packet. If the terminal recognizes the silence interval, the terminal can notify the base station not to allocate uplink radio resources to the terminal for transmitting audio data for a certain period of time. One of a MAC entity, a PDCP entity, and an RLC entity of the terminal can identify the packet indicating the silent interval by interpreting the packet or when receiving an indication of the silent interval from the upper layer.

In order for the terminal to transmit the above information to the base station, the terminal needs correct uplink radio resources. Therefore, this disclosure provides a method for effectively allocating radio resources to the terminal for transmitting the above-mentioned information to the base station.

According to a specific embodiment, the base station can arbitrarily allocate uplink radio resources to the terminal to allow the terminal to transmit information needed for or about transmission scheduling. For example, the base station can allocate uplink radio resources to the terminal through a channel for transmitting uplink radio resource allocation information, and instruct the terminal to preferentially use the allocated uplink radio resources to transmit scheduling information . According to this, the terminal reads the uplink radio resource configuration information, and when it is instructed to preferentially use a specific uplink radio resource to transmit scheduling information, the terminal uses the specific uplink radio resource to transmit scheduling related information.

In addition, the base station can use signaling between MAC entities to request the transmission of the scheduling-related information. The base station can configure the information channel through the uplink radio resource, or by using the PDU transmitted between the MAC entities, request the terminal to transmit the scheduling-related information. When receiving a request for transmitting the scheduling related information from the base station, the terminal uses the configured uplink radio resources to transmit the scheduling related information.

According to another specific embodiment, when a specific event set by the base station occurs, the terminal can transmit the scheduling related information to the base station. The base station can transmit measurement-related setting information to the terminal, where the terminal measures the radio environment based on the received measurement-related setting information. Thereafter, the terminal compares a measurement result with the setting conditions based on the measurement-related setting information. Therefore, when certain conditions are met, the terminal transmits measurement results or scheduling information to the base station.

In one aspect, when scheduling information is to be transmitted, the specific event or measurement-related setting information can be notified to the terminal. In another aspect, a specific event may indicate when the amount of data arriving at a specific channel of the terminal exceeds a specific reference value or falls below the specific reference value. In another aspect, the specific event may indicate when the amount of data arriving at one of the buffers of the terminal exceeds the specific reference value or falls below the specific reference value. In another aspect, the specific event may be based on the amount of radio resources currently allocated to the terminal to indicate when the time required to use the data stored in the terminal's buffer exceeds the specific reference value or falls below the specific reference value.

Information transmission from the terminal to the base station can be implemented through the control information channel of the MAC entity or the RRC entity. Therefore, as shown in Figure 4, the base station receives the scheduling related information from the terminal (S10), configures uplink and/or downlink radio resources to allow the terminal to transmit uplink data (S11), and The scheduling information including the allocated radio resources is transmitted to the terminal (S12).

In general, uplink and downlink radio resources are classified according to transmission topics. The terminal can perform transmission through uplink radio resources, and the base station completes transmission through downlink radio resources. In this aspect, because only the base station performs transmission and determines the scheduling of radio resources through downlink radio resources, some downlink radio resources are configured to transmit scheduling information to the terminal. Information about a specific terminal and which frequency and time are used for uplink transmission can be transmitted to the terminal.

According to this disclosure, the uplink radio resource can be used by several terminals, where the several terminals are not connected to each other. Therefore, the base station determines the allocation of radio resources for each terminal. Although the determined information is related to uplink radio resources, the base station informs the terminal of the decision. Scheduling information about uplink radio resources, that is, information about a specific terminal, and information about which frequency and time is used for uplink transmission, can be transmitted through downlink radio resources. For this reason, the time point when a schedule information about the uplink radio resource is transmitted through the downlink radio resource, and the time point when each terminal actually starts transmission through the uplink radio resource based on the schedule information is different.

Therefore, the base station can notify the terminals of the time difference between the transmission time of the schedule information and the actual use time. Here, the time difference can be transferred through the system information of the base station.

In addition, the base station can designate a specific time difference according to the service characteristics used by each terminal, and notify the terminals of the specific time difference. For example, a terminal with high processing capability can immediately process the schedule information when it receives it, and start transmission via the uplink. However, a terminal with low processing capability cannot immediately perform transmission. Therefore, a method for notifying each terminal of the specific time difference is used.

During the processing procedure, the base station decodes the data transmitted by the terminal. If the decoding fails, the base station allocates uplink radio resources to the terminal again. The base station can allocate uplink radio resources to the terminal, and at the same time send the NACK signal to the terminal. Or, when the base station sends a NACK signal, it can notify the terminal whether to use the same resources as the previous transmission.

When the base station instructs the terminal to use the same resources as the previous transmission, the terminal uses the same amount of radio resources previously used to perform the retransmission. Information about whether to use the same radio resources can be transmitted using a channel for transmitting scheduling information, or included in a channel for transmitting NACK and ACK signals related to a terminal transmission.

According to the features of this disclosure, the base station can send a page to the terminal. However, although the terminal does not transmit through the uplink channel, the terminal can continue to receive the downlink channel, resulting in an unavoidable reduction in the battery life of the terminal. Therefore, this disclosure provides a method for effectively sending paging to the terminal.

In order for the base station to effectively transmit the paging, an unnecessary action of checking whether the paging has been received by the terminal is removed. Therefore, in a method for effectively transmitting paging, the base station transmits the paging (information) to the terminal by using the downlink channel for transmitting scheduling information. The base station may directly include the identifier of the terminal to be paged by the base station in the channel used for transmitting scheduling information.

According to this, the terminal can periodically decode the scheduling information according to a predetermined time. Later, when the terminal finds its identifier, the terminal determines that it has been paged and immediately responds to the base station. In addition, when the terminal determines that it has been paged, the terminal starts to transmit a preset channel quality indicator (CQI) or pilot signal. When the base station detects the CQI or pilot signal, the base station regards the signal as a response to its paging and operates accordingly.

In the E-UTRAN system, a minimum time unit for distinguishing physical resources is a sub-time frame of 0.5 milliseconds. However, the total transmission time to the terminal can exceed 0.5 milliseconds (eg, if the NACK or ACK of the base station is larger). Therefore, transmitting the configuration information for the uplink or downlink physical resources to the terminal in each sub-time frame may cause a serious additional burden compared with the actual transmitted user data.

To remedy this, the base station can designate one or more sub-time frames as a single scheduling unit. For example, when the base station designates an uplink radio resource scheduling unit for a specific terminal as three sub-time frames, and the terminal receives a single uplink radio resource scheduling information, the terminal uses one of the three sub-time frames Scheduling information. Here, the three sub-time frames may use the same amount of radio resources, for example, the same frequency band. By using this method, the base station can effectively reduce the amount of scheduling information transmitted to the terminal.

When a single channel is set up or an RRC connection is formed between the terminal and the base station, the scheduling unit can be notified to the terminal. When the base station allocates the uplink radio resources to a specific terminal and at the same time informs the terminal that the schedule is valid during the four sub-time frames, the terminal can use the configured uplink radio resources to reach the four sub-time frames . In order to operate more efficiently, the base station no longer transmits scheduling information to the terminal during the scheduling unit. Or, during the scheduling unit, the terminal no longer reads the channel used to transmit uplink scheduling information. If a scheduling starting point configured for each terminal is different, the base station can notify each terminal of the point where the scheduling information should be read.

Figure 5 shows an example of transmitting scheduling information through the sub-time frame of the downlink channel according to a specific embodiment. Figure 6 shows an example of a terminal using scheduling information to identify uplink radio resources according to a specific embodiment.

Referring to FIG. 5, a first terminal (UE 1) can recognize that the uplink radio resources of frequencies 3 to 6 have been configured to the length of four sub-time frames at the first sub-time frame of a downlink channel. UE1 can recognize this configuration through the scheduling information received during the first sub-time frame. According to this, UE1 can use the configured uplink radio resources during the four sub-timeframes, as shown in Figure 6.

Referring to Figure 5, a second terminal (UE2) configures uplink radio resources during a second and fourth sub-timeframe. UE1 does not read the scheduling information from the second to the fourth sub-time frame, but reads the scheduling information at the fifth sub-time frame to check whether the resource has been allocated to UE1. UE2 reads the scheduling information at the fourth sub-time frame to check whether the resource has been allocated to UE2.

When checking, because UE2 configures the uplink radio resources in the fourth sub-time frame to reach the length of the second sub-time frame, as shown in Figure 5, UE2 uses the configured uplink radio resources during the second sub-time frame, such as Shown in Figure 6. UE2 can confirm that no resources are allocated to UE2 in the fifth sub-time frame.

If the base station does not allocate resources to the terminal for a certain period, it can notify the terminal of the next scheduled time. During this period, the terminal no longer checks scheduling information. The scheduling time can instruct the terminal to check a certain sub-time frame or notify when (that is, after how many sub-time frames) the scheduling information should be checked.

In one aspect, it may not be necessary to allocate radio resources to the terminal during each sub-time frame. For example, when the terminal needs to average one frequency band for each sub-time frame, a method for configuring two frequency bands for every two sub-time frames can be used. For example, when the base station starts to allocate radio resources from the x-th sub-time frame to the tenth sub-time frame, the base station can start transmitting radio resources in the even-numbered sub-time frames of the 10-th sub-time frame, and in each even-numbered sub-time frame Configure two frequency bands. According to this, the terminal uses radio resources on an average of one frequency band according to each sub-time frame.

To support this method, the base station can notify the terminal about a transmission permission process and a transmission disallow process. As long as a channel is set, or as long as the base station transmits scheduling information to the terminal, the base station can inform the terminal about the process of the initial stage of a call. Therefore, when the terminal configures the corresponding radio resource during one or more sub-time frame periods, the terminal uses the radio resource at the sub-time frame corresponding to the process of setting the radio resource to be used. For example, if the total number of processes of the terminal is 6, a first process is used in the first sub-time frame, a second process is used in the second sub-time frame, and a third process is used in the third sub-time frame. Use it at the frame, and so on, until a sixth process is used at the sixth sub-time frame. After that, for subsequent sub-time frames, the sequence of the processes is returned to the beginning, so that the first process is used at the seventh sub-time frame, and so on.

In one aspect, the base station determines that the terminal can use radio resources in processes 1, 3, and 5, and allocates a first frequency band in the first sub-time frame to the terminal to reach 30 sub-time frames. Here, the terminal only uses radio resources at a time interval when the permitted use process is started. Therefore, the terminal may use radio resources during sub-timeframes 1, 3, 5, 7, ..., etc., and not use radio resources during other intervals.

From the point of view of the downlink physical channel, the scheduling information is not used to transmit actual user data, and therefore can be regarded as an additional burden. Therefore, a method for reducing the amount of scheduling information is required. Schedule information can be expressed in a simpler way. For this purpose, a one-bit image type information configuration method can be used.

According to this disclosure, the base station can notify each terminal of the interval of a transmission schedule information, a time point of the schedule information transmission, and a location of the resource allocation information for the terminal at that time point. According to this, the terminal can read the scheduling information in time during the corresponding interval, and specifically read a part of the scheduling information corresponding to the terminal. When resources are allocated to the terminal, the terminal uses the allocated resources to receive data or transmit uplink data. If radio resources are not configured, the terminal waits to receive the next transmission of scheduling information. The position of the resource allocation information for the terminal indicates which bits in the plural bits of the bit stream correspond to the terminal. In addition, the radio resources allocated to the terminal can be fixedly designated radio resources at the beginning of setting up a call or in the middle of the call.

According to this disclosure, if there are four terminals, for example, a first terminal may be configured with a first position, a second terminal may be configured with a second position, a third terminal may be configured with a third position, and a second terminal may be configured with a third position. The four-terminal system is configured with a fourth position. Therefore, if the scheduled user information received during a specific sub-time frame is 0011, the radio resources are not allocated to the first and second terminals, but the radio resources are allocated to the third and fourth terminals. Here, there may be several methods for notifying the terminal about the configured resources from the base station.

According to a first method, after transmitting the scheduled user information, the base station notifies each terminal of the information about the actual allocation of radio resources. In this case, the information about the allocated radio resources follows the order of the terminals that are known to allocate the radio resources. In this example, the first radio resource configuration information corresponds to the third terminal, and the second radio resource configuration information corresponds to the fourth terminal.

According to another method, for more various schedules, the base station can combine several sub-time frames and provide information on which terminals allocate radio resources to these sub-time frames at the beginning of the sub-time frames. Several sub-time frames can be grouped into a single time-out frame, and information about which terminals allocate radio resources during the time-out frame is provided at the first sub-time frame of the time-out frame.

The terminal reads the first sub-time frame of the timeout frame to separately check whether the information (ie, a list) about which terminals are configured with radio resources includes its identifier. If the first sub-time frame of the timeout frame includes its individual identifier, the terminal receives the following sub-time frame. If the first sub-time frame of the time-out frame does not include its individual identifier, the terminal waits for the first sub-time frame of the next time-out frame or the transmission of information about which terminals are configured with radio resources. In order to provide information (or list) about which terminals are configured with radio resources in the timeout box, the above-mentioned bit mapping method can be used.

In order to effectively use the radio resources of a single cell (as described above), the terminal transmits scheduling related information to the base station. However, this may lead to some waste of radio resources and some unnecessary consumption of terminal power. For example, in a situation where the load of the base station will be considered. Here, the data used for the first service has reached a first terminal from the upper layer. According to this, the first terminal transmits scheduling related information to the base station that wants to allocate radio resources. However, in the cell where the first terminal is located, other terminals may want to transmit data. Therefore, if the data to be transmitted by another terminal is used for a service with a higher priority level than the first service for which the first terminal wants to transmit data, the base station can prioritize the allocation of radio resources to have higher priority than the first service. The priority of this service. Here, if the total amount of radio resources of the cell is limited, the base station may not allocate radio resources to the first terminal, or until more radio resources can be provided. Therefore, in this situation, by the first terminal continuously transmitting scheduling-related information to the base station, the uplink radio resources of the cell are wasted. According to this disclosure, a method for effectively transmitting scheduling-related information to the base station is provided, while preventing (or minimizing) the waste of radio resources.

Figure 7 shows a method for transmitting scheduling related information to a base station according to a specific embodiment. Referring to Figure 7, a terminal transmits scheduling related information to a base station (S20). The base station transmits an acknowledgment (ACK) in response to the scheduling related information (S21). After that, the terminal waits for radio resources to be allocated from the base station. If the terminal fails to receive the radio resource configuration from the base station after a predetermined time (S22), the terminal transmits scheduling related information to the base station (S23).

The scheduling-related information can be transmitted through a synchronous random access channel. The terminal informs the base station of its access through the synchronous random access channel, and uses the radio resources configured by the base station to transmit scheduling related information. The terminal can also notify the base station that the terminal needs radio resources. When using a random access channel, the terminal can use one or more fields for its identifier, and use other fields for transmitting scheduling-related information.

The time that the terminal waits (standby time) before retransmitting the schedule-related information can be established by the base station. The base station can individually notify the terminal about the standby time, or designate a standby time for each channel. The waiting time information can be transmitted to the terminal through the system information. Therefore, the UE must wait at least for the period indicated by the time information after sending the scheduling related information.

Referring to Figure 7, although the base station has successfully received the scheduling-related information from the terminal, if the priority level of the corresponding terminal is low or the base cannot immediately allocate radio resources to the corresponding terminal, the base station can use it for control The transmission information of scheduling related information is transmitted to the terminal (S24). The information used to control the transmission of schedule-related information can be notified when the terminal can transmit schedule-related information again.

The information used to control the transmission of scheduling information can be the amount of time the terminal should wait before retransmitting scheduling-related information, a time when the base station can provide radio resources to the terminal, and a base station can provide information about the terminal. At least one of the time of the radio resource allocation information is provided to the terminal. When the terminal receives information for controlling the transmission of scheduling-related information from the base station, the terminal does not transmit the scheduling-related information for a predetermined period according to one of the received information.

And after waiting for a predetermined time, if there is still need to send scheduling related information, the UE may transmit the scheduling related information.

At the same time, when a plurality of terminals appear in a single cell and request radio resource allocation from the base station through a random access channel at the same time, the base station has some difficulties in detecting the signal of the terminal. Therefore, the efficiency of the random access channel may be degraded.

Therefore, according to this disclosure, the random access channels that can be used by each terminal can be distinguished. Therefore, after dividing the random access channel into several groups, the base station informs the UE about which random access channel is allowed to be used by which UE. Therefore, when needed, the terminal can use its configured random access channel. The base station can divide random access into a certain number, and these terminals use random access channels at intervals equal to their identifiers. For example, when the base station divides the random access channel into four parts, the resources of the first random access channel can be used by the terminal with the remainder 0 when the terminal identifier is divided by 4. In addition, the resources of the second random access channel can be used by the terminal with a remainder of 1 when the terminal identifier is divided by 4. It should be noted that the resources of the random access channel can be distinguished by time or frequency band, and are not limited to the above solution.

In addition, the resources of the random access channel can be configured by the terminal. Especially compared with asynchronous random access channels, synchronous random access channels have a larger amount of information that can be transferred or detected. Therefore, assigning a specific signature sequence to the base station of each terminal will have the same effect as assigning the resources of the random access channel to each terminal.

According to this disclosure, the base station can allocate the resources of the synchronous random access channel to each terminal. Here, when synchronizing with the base station, if a terminal has data to be transmitted through the uplink channel, the terminal uses the resources of the synchronous random access channel allocated to each terminal. When detecting the terminal transmission from the synchronous random access channel allocated to each terminal, the base station recognizes the transmission through the random access channel as a request for the allocation of radio resources. If necessary, the base station allocates radio resources to the terminal. Here, various resources of the synchronous random access channel can be allocated to each terminal, and for example, a specific signature sequence can be allocated to each terminal or used for each logical channel of the UE.

For the description so far, this disclosure provides a method for allowing the terminal to efficiently and quickly transmit scheduling-related information to the base station, and the base station to effectively and quickly transmit the scheduling-related information to the terminal. Therefore, fast data transmission for more terminals can be guaranteed.

Although this disclosure is described in the context of mobile communication, the features of this disclosure can also be used in any wireless communication system using mobile devices, such as PDAs and laptops equipped with wireless communication capabilities. Furthermore, certain terms used to describe various features of this disclosure should not limit the category to certain types of wireless communication systems, such as UMTS. This teaching can also be applied to other wireless communication systems that use different air interfaces and/or physical layers, such as TDMA, CDMA, FDMA, WCDMA, etc.

Exemplary embodiments can be implemented as a method, equipment, or manufactured product using standard programming and/or engineering techniques to generate software, firmware, hardware, or any combination thereof. The term "manufactured product" used here refers to hardware logic (such as integrated circuit chips, field programmable gate arrays (FPGA), special purpose integrated circuits (ASIC), etc.), or computer-readable media (such as magnetic storage Media (such as hard disk drives, floppy disks, tapes, etc.), optical storage (CD-ROM, optical disks, etc.), volatile and non-volatile memory devices (such as EEPROM, ROM, PROM, RAM, DRAM, SRAM, Code or logic implemented in firmware, programmable logic, etc.).

The code in the computer-readable medium can be accessed and executed by the processor. The code that executes the exemplary embodiments can be further accessed from the file server through the transmission medium or through the network. In these cases, the manufactured product in which the code is implemented may include transmission media (such as network transmission lines), wireless transmission media, signals transmitted through space, radio waves, infrared signals, and so on. Of course, those skilled in the art will recognize that many modifications to this configuration can be made without departing from the scope of this disclosure, and the manufactured product can include any information carrying media known in the art.

The foregoing specific embodiments and features are merely exemplary and should not be regarded as limiting. This teaching can be easily applied to other types of equipment. This description is intended for demonstration and does not limit the scope of the patent application. Those who are familiar with this technology will understand many alternatives, modifications and changes. In the scope of the patent application, when the quotation function is implemented, the component-plus-function clause is expected to be covered by the structure described here, and it is not only structurally equivalent but also an equivalent structure.

<p>UE1. . . User equipment</p><p>UE2. . . Second terminal</p>

The accompanying drawings included herein provide further understanding, and are incorporated and constitute a part of this specification. The accompanying drawings show various exemplary embodiments and together with descriptions are used to explain the principles of this disclosure. The features, elements, and aspects referenced by the same numbers in different figures indicate the same, equivalent or similar features, elements, or aspects according to one or more specific embodiments.

Figure 1 shows an exemplary network structure of an evolved universal mobile telecommunications system (E-UMTS).

Figure 2 shows the control plane architecture of the radio interface protocol between a mobile terminal and a UMTS terrestrial radio access network (UTRAN) based on the 3GPP radio access network specifications.

Figure 3 shows the user plane architecture of the radio interface protocol between a mobile terminal and a UMTS terrestrial radio access network (UTRAN) based on the 3GPP radio access network specifications.

Figure 4 shows an exemplary method for configuring radio resources in a mobile communication system according to a specific embodiment.

Figure 5 shows an example of transmitting scheduling information through a downlink channel sub-time frame according to a specific embodiment.

Figure 6 shows an example of using a terminal to identify uplink radio resources through scheduling information according to a specific embodiment.

Figure 7 shows a method for transmitting scheduling related information to a base station according to a specific embodiment.