JP2010530145A - Resource allocation method in wireless communication network - Google Patents

Abstract

The present invention relates to a method for preallocating one or more resources to a frame for a mobile communication terminal, and transmitting resource allocation data to a number of frames in advance to provide diversity while providing resource allocation data to a mobile. Including that. In the method of allocating one or more resources to a frame for a mobile communication terminal, resource allocation for the Nth frame in the first MAC header transmitted in association with the first packet transmitted in the NXth frame The first MAC header is included in the first packet transmitted in the Xth frame before the packet transmitted in the Nth frame, and the X is a number greater than 0. A resource allocation method, characterized by:
[Selection] Figure 1B

Description

  The present invention relates to a method using radio communication resources, and more particularly, to a method for allocating resources for efficient radio communication in a mobile network.

  In the wireless communication industry, first, second, and third generations of communication protocols are used for communication between mobile terminals on a cellular communication network.

  The first generation is considered an analog terminal system known as an AMPS (Advanced Mobile Phone Service) phone system. The two generations are generally used to refer to digital cellular systems that are now widely used and include CDMAOne, Global System for Mobile Communications (GSM), and Time Division Multiple Access (TDMA). The 2nd generation system can support more users in denser areas than the 1st generation system.

  The third generation is commonly referred to as the digital cellular system currently under construction. Such three generation communication systems are conceptually similar in that they have some important differences between them. It is important to improve transmission efficiency for efficiently transmitting data in a wireless communication system. For this reason, it is important to study more efficient data communication methods and resource management.

  EV-DO or EVDO (Evolution-Data Optimized or Evolution-Data), briefly referred to as EV, is a communication standard for wirelessly transmitting data, typically through wireless signals for broadband Internet access. In order to maximize individual user throughput and overall system throughput, multiplexing techniques including CDMA as well as TDMA are used.

  EVDO was designed to support high-speed data transmission and was designed to be deployed along the side of the radio service voice service. EVDO provides access to mobile devices and a reverse link radio interface designed to operate between terminals as an IP-based network. Thus, EVDO can support any application program that runs on a network that falls within the limits of a specific bit rate.

  The main features of the EVDO communication channel are, for example, on the forward link from the access network (AN) to the access terminal (AT), such as the forward link from the base station to the terminal. Time to be multiplexed. This means that a single mobile uses all of the forward traffic channels within a particular sector for a given time slot. Through such a technique, each user's time slot is modulated independently. Thus, along with very complex modulation techniques, it provides a better service to the user in adapted radio frequency (RF) conditions. And it provides services to users in a bad RF state with simpler and overlapping signals.

  The forward channel may also divide a plurality of slots referred to as frames. Not only user traffic, but also overhead channels are interlaced into the stream. This includes a pilot channel that helps the terminal to locate and identify the traffic channel, MAC (Media Access Channel). The MAC transmits data over one or more logical channels (eg, control channels) that provide the traffic channel and other information (eg, resource allocation data) necessary for proper communication over the wireless network. Tell them what to do.

  Referring to FIG. 1A, resource allocation data for one frame such as UF (Ultra Frame) is specified in a MAC header or BOC (Broadcast Overhead Channel) area one frame before. If the terminal uses the data in the MAC header, the terminal does not need to monitor the BOC if the packet received in the current frame has already been decoded. The resource allocation data transmitted through the BOC may also be used by a newly joined terminal or a terminal monitoring a logical channel that has not received data in that frame without having the opportunity to decode a previous frame. is there. In order to increase efficiency and reduce errors due to packet loss carrying resource allocation data, we attempt to add and overlap the number of frames or channels that carry resource allocation data.

  Furthermore, current access methods for allocating resources in cells in a mobile communication network allocate more resources to cells located in the border region than cells located in the central region. The cell in the central region has an advantage of OTA (over-the-air) coupling.

  When the terminal is in a cell located at the center of the broadcast area, all adjacent cells transmit the same signal, and thus can have better broadcast signal strength. However, the terminal located in the cell in the boundary area of the broadcast area does not have the above-described advantages. Therefore, it is necessary to perform additional radio resource allocation for the cells in the border area in order to give reliability to the same signal. However, according to such a method, each cell in the boundary area of the broadcast area is designated to have more resources, and resource allocation information is changed from cell to cell. For this reason, the same BOC may not be used for all cells in the same region. Furthermore, the MAC header must be designed to include only resource allocation data for the cell for each cell.

  The present invention has been proposed in view of the above-described necessity, and specifically, an object of the present invention is to provide a method for allocating resources for efficient wireless communication in a mobile network.

  A method for allocating one or more resources to a frame for a mobile communication terminal according to an embodiment of the present invention for solving the above-described problem is related to the first packet transmitted in the NXth frame. Including the resource allocation data for the Nth frame in the transmitted first MAC header, wherein the first MAC header is transmitted in the Xth frame before the packet transmitted in the Nth frame. In the first packet, X is a number greater than zero.

  And further comprising transmitting the resource allocation data for the Nth frame through a broadcast overhead channel (BOC) associated with the N-Yth frame, wherein Y may not be the same as the X. .

  The method may further include transmitting resource allocation data for the Nth frame through a broadcast overhead channel (BOC) associated with the NZth frame, where Z may not be the same as Y or X.

  According to another embodiment of the present invention for solving the above-described problem, a method of allocating a set X resource to a first cell and allocating a set Y resource to a second cell starts with a cell in the first region. Using a single frequency network message that is transmitted and regards the sets X and Y as resources allocated to the cells of the first region, to at least one mobile communication terminal in the first region Transmitting the resource allocation data, wherein the first cell and the second cell are all on the first region, but are located in geographically different peripheral areas, and the 1st cell of the first cell In response to receiving the first non-single frequency network notification message, the first mobile communication terminal is notified that the resources of set X are allocated to the first cell. Can.

  Preferably, the second mobile communication terminal of the second cell receives a second non-single frequency network notification message so that resources of set Y are allocated to the second cell. The information transmitted by the resources allocated in the first and second geographical neighbor cells in the first region is the same.

  A system including one or more logical units according to still another embodiment for solving the above-described problem is configured to be performed in connection with the above-described method invention. In accordance with yet another embodiment of the present invention, a computer program device is provided that includes a computer useful medium having a computer readable program. When the computer-readable program is executed on a computer, the computer performs functions related to the above-described method invention.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The detailed description disclosed below in connection with the appended drawings is intended as a description of exemplary embodiments of the invention and is not intended to represent the only embodiments in which the invention may be practiced.

  According to the resource allocation method of the present invention, it is possible to perform efficient wireless communication through mobile diversity by transmitting resource allocation data in a number of frames in advance for a mobile communication terminal.

FIG. 5 is a diagram illustrating a method for allocating resources using a MAC header and a BOC according to an embodiment of the present invention. FIG. 4 is a diagram illustrating a method for allocating resources using a MAC header and a BOC according to an exemplary embodiment. FIG. 5 is a diagram illustrating a method for allocating resources using a MAC header and a BOC according to an embodiment of the present invention. FIG. 4 is a diagram illustrating an example of a logical channel according to an embodiment of the present invention.

  The present invention relates to a method for allocating one or more resources to a mobile communication terminal. The resource allocation method according to an embodiment of the present invention may include resource allocation data for an Nth frame in a first MAC header transmitted in association with a first packet transmitted in an NXth frame. Including. Here, N and X are integers, and X is a positive number. The first MAC header may include a first packet transmitted in an Xth frame before a packet transmitted in an Nth frame.

  In another embodiment, the resource allocation data is transmitted for the Nth frame through a BOC associated with the NY frame, eg, N-X + 1. Here, Y is not the same value as X. Additional resource allocation data is transmitted for the Nth frame through the MAC header associated with the BOC or NZth frame. Here, Z is not the same value as Y or X.

  The resource allocation described above is used in various ways to provide resource allocation data to the terminal. If the terminal has lost or has not received the resource allocation data due to an error or other problem, the terminal may additionally have an opportunity to retrieve the resource allocation data by other methods.

  Referring to FIG. 1B, the resource allocation data according to one embodiment of the present invention is included in various frame (eg, two UF) headers of the MAC header, instead of being included in the previous frame as shown in FIG. 1A. included.

  In this case, if the terminal does not receive the resource allocation data in the MAC header transmitted on the (n-2) th UF (that is, the frame immediately before the immediately preceding frame), the terminal receives the (n-1) th UF ( That is, the same data included in the MAC header transmitted together with the immediately preceding frame) can be received.

  In another embodiment, in order to provide additional redundancy, resource allocation data is not transmitted through the BOC transmitted during a single frame, but instead of the n-2th UFn-2 and n-1 It is generally included in the BOC transmitted during multiple frames such as the second UF. The transmission of the resource allocation data through the BOC is combined to include the resource allocation data with multiple MAC headers according to an implementation method.

  For example, referring to FIG. 1B, in contrast to FIG. 1A, the resource allocation for the UF is transmitted through the BOC associated with the n-1 th UF. On the other hand, the same resource allocation data is also transmitted in the MAC header associated with the (n-2) th UF. In this case, the terminal that lost the data packet transmitted in the previous frame can search for the resource allocation data by changing to the BOC during the sub-sequence frame.

  Referring to FIG. 1C, as another embodiment of the present invention, resource allocation data is included in the previous three frames in a MAC header such as three UFs. Then, the same information transmitted in a plurality of previous frames (for example, two UFs) is repeated through the BOC. In the above embodiment, if the terminal has not received the resource allocation data on the MAC header associated with the (n-3) th UF, the terminal still has the resource allocation data from the BOC transmitted to UFn-2 or UFn-1. Can be searched.

  In the above embodiment, it is noted that additional network redundancy can be constructed in various forms. That is, the resource allocation data associated with the target frame is included in the MAC header or in the BOC associated with other frames transmitted before the target frame in various combinations. For example, the additional resource allocation data can be 2, 3, 4 or n th in advance through the BOC or in the MAC header to reduce redundancy and thereby reduce the error rate associated with undelivered packets. Provided in the frame.

  According to another embodiment of the present invention, when there are a plurality of cells in the cellular network, more resources are located in the boundary region of the region than in the central region of the region where the information is broadcast. Is assigned. In this case, the internal cell has an advantage of OTA (Over The Air) combined transmission of all cells in the region. When the terminal is located in a cell in the central area of the broadcast area, all adjacent cells transmit the same signal, so that the broadcast signal strength can be improved. However, the terminal located in the cell of the boundary area of the broadcast area does not have such advantages. Additional radio resources are allocated in order to reliably give the same signal to the cells in the border area of the area.

  The same resource allocation data in the BOC or MAC header of all cells in the broadcasting area so that the signals for the BOC and MAC headers are the same, and signals coming from different cells are combined with OTA (Over The Air). Is desirable to transmit. In the embodiment, the resource allocation information may be different between cells in the central area or the boundary area of the broadcasting area.

  In order to solve the above problem, according to an embodiment of the present invention, the MAC header and the BOC are configured to include resource allocation data for all cells. As an example, a cell with fewer allocated resources may transmit a notification regarding which resources to ignore. In another example, a cell with low allocated resources may transmit a notification indicating that a specific resource allocated for broadcasting purposes in a broadcasting region is used for other purposes in the corresponding cell. In this case, the number of resources allocated to all the cells specified by the BOC and MAC headers is the same. That is, all cells receive the same resource allocation data in the BOC or MAC header regardless of the number of resources allocated to each cell.

  In one embodiment, a signal is transmitted from a cell that specifies a target resource in order to provide information on the resource allocated to the cell to the corresponding cell. Therefore, the receiver of each cell ignores such resources even if resource allocation information for resources not allocated to the cell is included in the BOC or MAC header. In another embodiment, an arbitrary signal may be transmitted to a terminal such as a non-broadcast receiving terminal in order to use the excluded resource.

  Referring to FIG. 2, a cell in a central area of a broadcasting area having a small number of broadcasting resources is a cell that is not configured to support a BCMCS (Broadcast Multicast Services) or does not support this. A non-SFN (single frequency network) message can be used to specify the terminal. Since the PBCCH (Primary Broadcast Control Channel) of the sector may not constitute the excluded resource for the BCMCS, a separate resource may not be necessary. In addition, a separate message for the excluded information may not be necessary. For broadcast area boundary area cells, the approach described above provides SFN gain on the BOC and MAC capsule headers.

  According to one embodiment, the BOC is used to specify resources of all sub-zones having other resource allocations such as sector IDs. Therefore, the terminal can know in which area the terminal is located based on the current sector ID in the active set of the terminal. The BOC may also be used to specify all subzone resources with other resource allocations. The non-SFN message may be used to inform the terminal of the subzone ID of the terminal.

  In one embodiment, resources retrieved in the internal region are also designated or advertised as BCMCS logical channels. That is, the exclusion information also has an SFN gain. Similarly, resources added in external regions are advertised on the BCMCS logical channel. That is, the inclusion information also has an SFN gain.

  Depending on the implementation, the present invention may generally have the form of a hardware embodiment, a software embodiment, or an embodiment including all hardware and software elements. Software embodiments can include, but are not limited to, firmware, resident software, microcode, etc.

  The present invention may also be in the form of a computer program product accessible by a computer or computer readable medium by a computer or instruction word execution system or providing program code for use thereof. To achieve the objectives of the present invention, a computer or computer readable medium is for using, storing, communicating, or propagating programs associated with or associated with an instruction word execution system, apparatus or device. Or it can be any device capable of communication.

  A data processing system suitable for storing or executing program code includes at least one processor coupled directly or indirectly to memory components through a system bus. The memory is a temporary memory for at least one of the programs to reduce the number of local memories that operate during actual execution of program code, mass storage devices, and time code retrieved from mass storage during execution. A cache memory that provides secure storage can be included.

  Other components may be included in the system. Input / output (I / O) devices, including but not limited to keyboards, displays, and pointing devices, are included in the system directly or indirectly through an arbitrating I / O controller. Network adapters (eg, modems, cable modems, internet cards) are also included in data processing systems included in other data processing systems, remote printers or storage devices through personal or shared network media.

  The logic code, program, module, process, method, and order in which each component of each method is performed is an example of the present invention. According to an embodiment of the present invention, the logic code, the program, the module, the process, the method, and each component of each method may be performed in one arbitrary order not explicitly shown in the detailed description of the present invention, Done in parallel. In addition, the logic code is not associated with or limited to any particular programming language, and includes one or more processors or multiprocessing environments not mentioned or referred to herein. It may be composed of one or more modules executed in

  The method described above is used in the manufacture of integrated circuit chips. The resulting integrated circuit chip is transmitted by being manufactured in a wafer form processed like a bare die or package form (like a single wafer with multiple unpackaged chips). In the latter case, the circuit chip can be a single chip package (such as a plastic carrier attached to a motherboard or other high-level carrier), or a multiple chip package (on one or both sides of the buried interconnect). (Such as a ceramic carrier having interconnections).

  In some cases, the circuit chip is integrated with other chips, separate circuit components and / or other single processing devices such as intermediate products such as a motherboard or part of an end product. The end product can be any product that includes integrated circuit chips, ranging from toys and other low-end applications to computer programs with displays, keyboards or other input devices and a central processor.

  The detailed description of the preferred embodiments of the present invention disclosed above is provided to enable any person skilled in the art to implement and practice the invention. The above description has been made with reference to the preferred embodiments of the present invention. However, those skilled in the art will not depart from the spirit and scope of the present invention described in the following claims. It can be understood that various modifications and changes can be made to the present invention within the scope. Accordingly, the present invention is not intended to be limited to the embodiments disclosed herein, but is to provide the widest scope consistent with the principles and novel features disclosed herein.

Claims (20)

In a method for allocating one or more resources to a frame for a mobile communication terminal,
Including resource allocation data for the Nth frame in the first MAC header transmitted in association with the first packet transmitted in the NXth frame;
The first MAC header is included in the first packet transmitted in the Xth frame before the packet transmitted in the Nth frame, and the X is a number greater than zero. , Resource allocation method. Further comprising transmitting the resource allocation data for the Nth frame through a broadcast overhead channel (BOC) associated with the N-Yth frame, wherein Y is a number greater than zero. The resource allocation method according to claim 1, wherein the resource allocation method is a feature. The method of claim 2, further comprising transmitting resource allocation data for the Nth frame through a broadcast overhead channel (BOC) associated with the NZth frame, wherein Z is a number greater than zero. The resource allocation method described in 1. The method of claim 2, wherein the Y satisfies Y = X + 1. The resource allocation method according to claim 3, wherein the N satisfies N = X + 2. Further comprising including resource allocation data for the Nth frame in a second MAC header transmitted in association with the second packet transmitted in the N-Wth frame;
The second MAC header is included in a second packet transmitted in a W-th frame before the packet transmitted in the N-th frame, and the W is a number greater than zero. The resource allocation method according to claim 1. The resource allocation method according to claim 6, wherein the W satisfies W = X + 1. In a system for allocating one or more resources to a frame for a mobile communication terminal,
A logical unit including resource allocation data for the Nth frame in the first MAC header transmitted in association with the first frame transmitted in the NXth frame;
The first MAC header is included in a first packet transmitted in an Xth frame before a packet transmitted in the Nth frame, and the X is a number greater than zero. A resource allocation system. The method of claim 8, further comprising a logical unit for transmitting resource allocation data for the Nth frame through a broadcast overhead channel (BOC) associated with the N-Yth frame. Resource allocation system. The resource allocation system of claim 9, further comprising a logical unit that transmits the resource allocation data for the Nth frame through a broadcast overhead channel (BOC) associated with the NZth frame. . And further comprising a logical unit including resource allocation data for the Nth frame in the second MAC header transmitted in association with the second packet transmitted in the N-Wth frame, wherein W is 0 9. The resource allocation system according to claim 8, wherein the resource allocation system is a large number. In the method of assigning set X resources to the first cell, assigning set Y resources to the second cell,
Use a single frequency network message transmitted from a cell in the first region and regards the sets X and Y as resources allocated to the cell in the first region, and at least one in the first region. Transmitting resource allocation data to one or more mobile communication terminals;
The first cell and the second cell are all on the first region, but are located in geographically different surrounding areas,
In response to receiving the first non-single frequency network notification message, the first mobile communication terminal of the first cell receives set X resources to the first cell. I was notified to be assigned,
In response to receiving the second non-single frequency network notification message, the second mobile communication terminal of the second cell is notified that the resources of set Y are allocated to the second cell. A resource allocation method characterized by the above. The method of claim 12, wherein the information transmitted by the resources allocated in the first and second geographical neighboring cells in the first region is the same. In a method for allocating one or more resources to one or more cells,
Determine the number of resources for each cell located in one area,
Use the single frequency network message transmitted from the first area cell to identify the N resources allocated to the first area cell, and use the first and second cells to the first area. Transmitting resource allocation data to at least one mobile communication terminal located in
Notifying the first mobile communication terminal located in the second cell of the M resource through a non-single frequency network message notifying that the first mobile communication terminal receives the information conveyed by the M resource. The N resource is allocated to the first cell geographically adjacent in the first region, and the M resource is second geographically in the first region. A resource allocation method, wherein the resource allocation method is allocated to the adjacent second cell, and the M is a subset of the N. Further comprising notifying the second mobile communication terminal of N resources excluding the M resources through a non-single frequency network message;
The resource allocation method according to claim 14, wherein the resource is used to transmit information different from the information transmitted to the first mobile communication terminal. In a method for allocating one or more resources to one or more cells,
Determine the number of resources for each cell located in one area,
At least one mobile communication located in the first region using a single frequency network message transmitted from the first region cell identifying N resources allocated to the first region cell; Transmit resource allocation data to the terminal,
The first mobile communication terminal of the second cell of the N resource excluding the M resource is passed through a non-single frequency network message in which the first mobile communication terminal is notified to receive information through the M resource. Including notifying,
The N resource is allocated to the first geographically adjacent first cell in the first region, and the M resource is the second geographically adjacent to the second region in the first region. A method for allocating resources, characterized in that it is allocated to a cell and said M is a subset of said N. In a system for allocating set X resources to the first cell and allocating set Y resources to the second cell,
Use a single frequency network message transmitted from a cell in the first region and regards the sets X and Y as resources allocated to the cell in the first region, and at least one in the first region. Including a logical unit for transmitting resource allocation data to one or more mobile communication terminals;
The first cell and the second cell are all on the first region, but are located in geographically different surrounding areas,
In response to receiving the first non-single frequency network notification message, the first mobile communication terminal of the first cell is notified that the resources of set X are allocated to the first cell. ,
In response to receiving the second non-single frequency network notification message, the second mobile communication terminal of the second cell notifies the second cell that the resources of set Y are allocated to the second cell. A resource allocation system characterized by receiving. The resource allocation system of claim 17, wherein the information transmitted by the allocated resources in the first and second geographical neighboring areas of the first region is the same. In a system that allocates one or more resources to one or more cells,
A logical unit that determines the number of resources for each cell located in one region;
Using a single frequency network message transmitted from one or more cells of the first region to identify N resources allocated to one or more cells of the first region, the first cell and the second A logical unit for transmitting resource allocation data from at least one cell to at least one mobile communication terminal located in the first region;
The first mobile communication terminal located in the second cell of the M resource through a non-single frequency network message in which the first mobile communication terminal is notified to receive information conveyed by the M resource. And a logical unit to notify,
The N resource is allocated to the first cell geographically adjacent in the first region, and the M resource is the second geographically adjacent in the first region. Resource allocation system, wherein M is a subset of N. A logical unit notifying the second mobile communication terminal of N resources excluding M resources through a non-single frequency network message;
The resource allocation system according to claim 19, wherein the resource is used to transmit information different from the information transmitted to the first mobile communication terminal.

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