KR20090128455A - Resource management in a wireless communication network - Google Patents

Abstract

PURPOSE: A resource management in a wireless communication network is provided to implement efficient wireless communication in a mobile network by providing additional redundancy to plural frame or channels that transfer resource allocation data. CONSTITUTION: The resource allocation for one frame is defined within a corresponding band in a MCA(Medium Access Control) header, or the resource allocation is defined in a BOC(Broadcast Overhead Channel) which is preceded in one frame. The resource allocation data transmitted through the BOC are used by the mobile terminals that are newly joined. The mobile terminals monitors monitor a logical channel. A logical channel does not include the data that are received in a corresponding frame.

Description

Resource management method in wireless communication system {Resource management in a wireless communication network}

The present invention relates to a method of utilizing wireless communication resources, and more particularly, to a resource allocation method for efficient and effective wireless communication in a mobile network.

In the wireless communications industry, 1G, 2G and 3G, i.e. first, second and third generation wireless protocols have been used for communication between mobile terminals in cellular communication networks.

1G refers to an analog phone system known as Advanced Mobile Phone Service (AMPS). 2G generally refers to digital cellular systems that are still widely used to this day and include CDMAOne, Global System for Mobile communications (GSM) and Time Division Multiple Access (TDMA). 2G systems can support more users in dense space than 1G systems.

3G generally refers to a digital cellular system currently under implementation. This 3G communication system is conceptually similar to other communication systems except for some important features. In a wireless communication system, it is important to improve transmission efficiency for effective data transmission. For this purpose, it is important to develop data communication methods and resource management methods more effectively.

EVDO (EV-DO, EV, Evolution-Data Optimized or Evolution-Data Only) is a communications standard for the wireless transmission of data over wireless signals and is generally for broadband Internet access. EVDO uses multiplexing techniques, including TDMA as well as CDMA, to maximize both individual user throughput and overall system throughput.

EVDO is designed to support high data rates and to implement voice services over wireless carriers. EVDO provides access to mobile devices through forward and reverse link air interfaces designed to operate end-to-end, such as Internet Protocol (IP) -based networks. In other words, EVDO can support any application that can operate on the network described above within certain bit rate limits.

A key feature of the EVDO communication channel is time multiplexing on the forward link from the access network (AN) to the access terminal (AT), ie from the base station to the mobile terminal. This means that one mobile terminal uses both forward traffic channels for a given time slot in a particular local space (sector). Using this technique, each user's time slot is independently modulated. It can use very complex modulation techniques to provide better service to users in good radio frequency (RF) conditions or in poor RF conditions using simpler and more banal signals.

The forward channel is divided into a plurality of slots called frames. In addition to user traffic, overhead channels are interlaced into the stream. These overhead channels include a pilot channel used by the mobile terminal to search and recognize a traffic channel, a media access channel (MAC) for notifying the mobile terminal of when data designated for the mobile terminal is scheduled to be transmitted through the traffic channel, And one or more logical channels (eg, control channels) that provide other information (eg, resource allocation data) that the mobile terminal needs to recognize in order to communicate more smoothly in the wireless network.

Referring to FIG. 1A, resource allocation for one frame (eg, Ultra Frame (UF)) is specified within the corresponding band on the MAC header, or one frame preceding the broadcast overhead channel (Broadcast). Overhead Channel, BOC). The data on the MAC header is used by the mobile terminal. Therefore, if the packet received in the current frame has already decoded, the mobile terminal does not need to monitor the BOC. The resource allocation data transmitted through the BOC is used by newly joined mobile terminals that did not have a chance to decode a previous frame or by mobile terminals monitoring a logical channel that does not contain data to receive in that frame. Used. In order to improve efficiency and reduce the error rate caused by the loss of packets carrying resource allocation data, it is desirable to provide additional redundancy to multiple frames or channels carrying resource allocation data.

Also, in a cellular communication network, the current method for allocating resources in one cell is to instruct that more resources are allocated to cells at the edge of the cellular zone than to cells within the central region of the cellular zone. Inner cells have an over-the-air combined advantage. That is, when the mobile terminal is in a cell located in the center of the broadcast zone, the mobile terminal receives a broadcast signal of better strength because all neighboring cells transmit the same signal. On the other hand, a mobile terminal located in a cell at the edge of the broadcast zone does not have this gain. For the cell at the edge of the zone, additional radio resources are allocated to make the same signal more reliable.

The disadvantage of the above approach is that since the cells in the zone of the zone are designed to use more resources, the resource allocation information varies from cell to cell. In other words, the same BOC cannot be utilized for all cells in the same zone. In addition, since the MAC header is individually configured for each cell, the MAC header can only include resource allocation data for one cell. Either use the same BOC in all cells of the broadcast zone or make the resource allocation data included in the MAC header the same so that the signals in the BOC and MAC headers match and that these signals received from other cells can be combined wirelessly. desirable.

The present invention provides additional redundancy in multiple frames or channels carrying resource allocation data in order to improve efficiency and reduce the error rate caused by the loss of packets carrying resource allocation data.

In addition, the present invention uses the same BOC in all cells of the broadcast zone or makes the resource allocation data included in the MAC header the same, so that the signals of the BOC and MAC headers match and these signals received from other cells are radio combined. To be possible.

In one embodiment of the present invention, a resource allocation method for pre-allocating one or more resources in a frame in a mobile communication terminal includes a first MAC associated with a first packet transmitted in an NX-th frame for resource allocation data for the N-th frame. And including in a header, wherein the first MAC header is included in the first frame transmitted X frames ahead of the packet transmitted in the N-th frame, and X is a number greater than zero. In addition, the resource allocation method according to an embodiment of the present invention further includes the step of transmitting the resource allocation data for the N-th frame through the Broadcast Overhead Channel (BOC) associated with the NY-th frame, wherein Y is greater than zero It is a number. In addition, the resource allocation method according to an embodiment of the present invention further includes the step of transmitting resource allocation data for the N-th frame through the Broadcast Overhead Channel (BOC) associated with the NZ-th frame, Z is for example Not equal to, Y or X.

In another embodiment of the present invention, when the first cell and the second cell are included in the first zone, but included in different geographical regions, the resources of set X are allocated to the first cell and set. A resource allocation method for allocating resources of Y to the second cell is provided. The resource allocating method includes a single frequency network message transmitted from cells in the first zone that identifies the union of the set X and the set Y as resources allocated to the cells of the first zone. And transmitting resource allocation data to at least one mobile communication terminal in the first zone. The first mobile communication terminal in the first cell also receives a first non-single frequency network notification message to be notified that the resources of the set X are designated for allocation to the first cell.

More preferably, the second mobile communication terminal in the second cell receives a second non-single frequency network notification message to indicate that the resources of the set Y are designated for allocation to the second cell. Notified In this case, in both the first geographic region and the second geographic region of the first zone, the information conveyed by the allocated resources is the same.

In another embodiment of the present invention, there is also provided a system comprising one or more logic units. One or more logic units are configured to perform functions and operations related to the resource allocation method described above. In still another embodiment of the present invention, a computer program product including a computer usable medium having a computer readable program is provided. When the computer readable program is executed on the computer, it causes the computer to perform the functions and operations related to the resource allocation method described above.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The detailed description, which will be given below with reference to the accompanying drawings, is intended to explain exemplary embodiments of the present invention and is not intended to represent the only embodiments in which the present 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. In some instances, well-known structures and devices are omitted or shown in block diagram form, centering on the core functions of each structure and device, 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 one embodiment of the present invention, there is provided a method for allocating one or more resources for a mobile communication terminal, wherein resource allocation data for an Nth frame is put in a first MAC header associated with a first packet transmitted in an NXth frame. Wherein N and X are integers, and X is particularly positive. The first header is included in the first packet transmitted X frames ahead of the packet transmitted in the Nth frame.

In embodiments of the present invention, resource allocation data for the N-th frame is transmitted over a BOC associated with the N-Y (eg, N-X + 1) th frame. In addition, additional resource allocation data for the Nth frame is transmitted through a BOC or MAC header associated with the N-Z (where Z is a different value from X and Y).

Allocating resources in the manner described above may provide additional diversity in providing resource allocation data to the mobile terminal, if the mobile terminal has lost or not received resource allocation data due to an error or other problem. If so, the mobile terminal may have an additional opportunity to detect resource allocation data using other means.

Referring to FIG. 1B, in one embodiment of the present invention, resource allocation data is not included in the MAC header of the immediately preceding frame shown in FIG. 1A, but in a MAC header preceding a certain frame (for example, 2 UF). Included. With this, if the mobile terminal does not receive resource allocation data contained in the MAC header transmitted at UF n-2 (ie, the frame immediately preceding the frame), the mobile terminal transmits at UF n-1. (Ie, immediately preceding frame) has a second chance to receive the same resource allocation data contained in the MAC header.

In embodiments of the present invention, in order to provide additional redundancy, the resource allocation data is not transmitted only through the BOC transmitted in one frame, but a plurality of frames (eg, UF n-2 and UF n−). Included on the BOC transmitted in 1). The transmission of resource allocation data via the BOC can also be combined with a method of including resource allocation data in multiple MAC headers, depending on the implementation.

For example, referring to FIG. 1B, unlike FIG. 1A in which resource allocation data for UF n is transmitted through a BOC associated with UF n-1, the same resource allocation data is associated with a MAC header associated with UF n-2. You can see that it is also sent through. According to this method, the mobile station which lost the data packet in the previous frame can detect the resource allocation message by tuning the BOC of the next frame.

As another example, referring to FIG. 1C, resource allocation data is included in a MAC header preceding three frames (eg, 3 UF), and the same information is associated with a BOC preceding a particular frame (eg, 2 UF). Iterate through. For example, if the mobile terminal does not receive resource allocation data in the MAC header associated with UF n-3, the mobile terminal may detect the resource allocation data from the BOC transmitted in UF n-2 or UF n-1. have.

It will be apparent to those skilled in the art that various modifications of the above-described embodiments are possible for implementing additional redundancy in the network. That is, resource allocation data associated with a target frame is included in a MAC header or BOC associated with another frame transmitted in advance of the target frame in many different combinations. For example, by providing redundancy, additional resource allocation data may be provided 2,3,4 or n frames ahead of either the BOC or MAC header to reduce error rates caused by undelivered packets. .

According to another embodiment of the present invention, when there are a plurality of cells in one cellular network, more resources are allocated to the cells in the edge region than the cells in the central region of the zone for broadcasting information. In this case, the inner cells can take the radio coupling gain, and if the mobile terminal is in a cell located in the center of the broadcast zone, the mobile terminal will broadcast better strength because all neighboring cells transmit the same signal. Receive the signal. On the other hand, a mobile terminal located in a cell at the edge of the broadcast zone does not have this gain. For the cell at the edge of the zone, additional radio resources are allocated to make the same signal more reliable.

It is desirable for all cells in the broadcast zone to transmit the same resource allocation data in the BOC or MAC header so that the signals in the BOC and MAC headers match and these signals received from other cells can be combined wirelessly. In embodiments of the present invention, resource allocation data is different between cells in the central area or the edge area of the zone.

In order to solve the above problem, according to an embodiment of the present invention, the MAC header and the BOC is configured to include resource allocation data for all cells. In one implementation, a cell with few allocated resources sends a notification as to which resource should be ignored. In another implementation, a cell with less allocated resources transmits an indicator indicating that certain resources allocated for broadcasting purposes in the zone are used for other purposes in that cell. According to this method, the number of resources allocated to all cells indicated in the BOC or MAC header is the same. That is, regardless of the number of resources allocated to each cell, all cells receive the same resource allocation data in the BOC or MAC header.

In an embodiment of the present invention, in order to provide information about the allocated resources to the cell, a signal indicating the target resources is transmitted from the cell, and resource allocation data about the resources not allocated to the cell includes a BOC or MAC header. Although received through, the receiver of each cell recognizes to ignore such unallocated resources. In another embodiment of the present invention, a signal for using the excluded resources is transmitted to a terminal (eg, a non-broadcast receiving terminal).

Referring to FIG. 2, a cell located in the middle of a zone to which less broadcast resources are allocated does not inform a terminal in that cell that some of the resources are not configured or do not support BCMCS (Broadcast Multicast Services). ) -Use Single Frequency Network (SFN) messages. Since the Primary Broadcast Control Channel (PBCCH) of that sector does not set up resources that are excluded in connection with BCMCS, the use of non-SFN messages does not require additional resources. No additional message for exclusion information is needed. For cells at the edge of the zone, the method described above provides SFN gain to the BOC and MAC capsule headers.

In one embodiment of the present invention, the BOC is utilized to designate the resources of all sub-zones that differ in resource allocation as well as the associated sector ID. That is, the terminal recognizes in which zone it is located based on the current sector ID in the activated set. The BOC is utilized to specify the resources of the sub-zones, and the sub-zones have different resource allocations. The non-SFN message is used to inform the terminal of the sub-zone ID.

In one embodiment of the present invention, the resources excluded from the inner zone are also designated or advertised in the BCMCS logical channel, so the exclusion information also has SFN gain. Similarly, resources added to the outer zone are advertised in the BCMCS logical channel, so that the inclusion information also has an SFN gain.

According to the resource allocation method and apparatus therefor according to the present invention, the resource management efficiency is improved, and the error rate caused by the loss of packets carrying the resource allocation data is reduced.

In implementing the present invention, all of the configurations may be formed in hardware, all of the configurations may be formed in software, or may be formed in a form including both hardware and software. Software forms include, but are not necessarily limited to, firmware, resident software, microcode, and the like.

Further, the present invention may be in the form of a computer program product including program code connected to or used by a computer, which may be used by a computer and readable from a computer readable medium. In order to achieve the objects disclosed in the present invention, a computer-readable and computer-readable medium may include, store, communicate, propagate or transmit an instruction execution system, a program connected to or used by apparatuses. It can be any device.

A data processing system suitable for storing or executing program code may include at least one processor coupled directly or indirectly to memory components via a system bus. The memory component may include local memory that operates during actual execution of the program code, a large storage unit, and cache memory that is a temporary storage unit of at least some program code to reduce a lot of time detected from the large storage unit during execution. .

Other components are connected to the system. The input / output unit and I / O devices (including but not limited to keyboards, display devices, pointing devices, etc.) are directly connected to the system or connected to the system through relaying of the I / O controller. Network adapters (ie, modems, cable modems, or Ethernet cards) are coupled with the system to allow the data processing system to be connected to other data processing systems or remote printers or storage through relays in private or public networks.

It will be apparent to those skilled in the art that the order associated with logic code, programs, modules, processes, methods, and individual components of each method is exemplary only. In the implementation of the present invention, unless otherwise specified herein, it may be performed in any order or in parallel. In addition, the logic code is not associated with, or limited to, a particular programming language, and includes one or more modules that run on one or more processors, under distributed or non-distributed, or multiprocessor environments.

The method described above can also be used in the form of fabrication of integrated circuit chips. The integrated circuit chips produced may be distributed by the manufacturer in the form of a raw wafer in die form (ie, one wafer containing multiple unpackaged chips) or in the form of one chip patch. In the latter case, the chip may be mounted in a single chip package (such as a plastic carrier containing copper wires attached to the motherboard or another higher level carrier) or in a multichip package (one or both of the surface connections or buried connections). Ceramic carrier).

In other cases, the chip is integrated with other chips or separate circuit components and / or other signal processing devices into part of (a) an intermediate product, such as a mother mode, and / or (b) another final product. The end product can be any product that includes an integrated circuit chip, which can be anything from toys and other sub-applications to display devices, keyboards or other input devices and advanced computer products with a central processor.

1A to 1C are exemplary diagrams of resource allocation methods using a MAC header and a BOC according to an embodiment of the present invention.

2 is an illustration of a logical channel definition in accordance with an embodiment of the present invention.

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. Although the above has been described with reference to the 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. Thus, 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.

Claims (20)

A resource allocation method for pre-allocating one or more resources in a frame at a mobile communication terminal, Including resource allocation data for the N-th frame in a first MAC header associated with the first packet transmitted in the N-X-th frame, The first MAC header is included in the first frame transmitted X frames ahead of the packet transmitted in the Nth frame. X is a number greater than zero, Resource allocation method. The method of claim 1, Transmitting resource allocation data for the N th frame through a BOC (Broadcast Overhead Channel) associated with the N-Y th frame; Y is a number greater than zero, Resource allocation method. The method of claim 2, Transmitting resource allocation data for the N-th frame through a BOC (Broadcast Overhead Channel) associated with the N-Z-th frame, Z is a number greater than zero, Resource allocation method. The method of claim 2, Y is X + 1, Resource allocation method. The method of claim 3, wherein N is X + 2, Resource allocation method. The method of claim 1, Including resource allocation data for the N-th frame in a second MAC header associated with the second packet transmitted in the N-W-th frame, The second MAC header is included in the second frame transmitted before the W frame before the packet transmitted in the Nth frame. W is a number greater than zero, Resource allocation method. The method of claim 6, W is X + 1, Resource allocation method. A system for pre-allocating one or more resources to a frame at a mobile communication terminal, A logic unit including resource allocation data for an Nth frame in a first MAC header associated with a first packet transmitted in an N-Xth frame, The first MAC header is included in the first frame transmitted X frames ahead of the packet transmitted in the Nth frame. X is a number greater than zero, system. The method of claim 8, A logic unit for transmitting the resource allocation data for the N-th frame through the Broadcast Overhead Channel (BOC) associated with the N-Y-th frame, Y is a number greater than zero, system. The method of claim 9, A logic unit for transmitting resource allocation data for the N-th frame through the Broadcast Overhead Channel (BOC) associated with the N-Z-th frame, Z is not equal to Y, system. The method of claim 8, A logic unit for including resource allocation data for the N-th frame in a second MAC header associated with the second packet transmitted in the N-W-th frame, W is a number greater than zero, Way. When the first cell and the second cell are included in the first zone, but are included in different geographical regions, the resources of set X are allocated to the first cell and the resources of set Y are allocated to the second cell. As a resource allocation method to allocate, The first zone using a single frequency network message transmitted from cells in the first zone, identifying the union of the set X and the set Y as resources allocated to cells in the first zone Transmitting resource allocation data to at least one mobile communication terminal in the cell, A first mobile communication terminal in the first cell receives a first non-single frequency network notification message and is notified that resources of the set X are designated for allocation to the first cell; A second mobile communication terminal in the second cell receives a second non-single frequency network notification message and is notified that the resources of the set Y are designated for allocation to the second cell, Resource allocation method. The method of claim 12, In both the first geographic region and the second geographic region of the first zone, the information conveyed by the allocated resources is the same, Resource allocation method. In the resource allocation method for allocating one or more resources to one or more cells, Determining a number of resources for each of the cells in the zone, wherein resource N is allocated to a first cell in a first geographic region of a first zone, and resource M is assigned to a second geographic area of the first zone Assigned to a second cell in the region, M is a subset of N; Identify the resource N allocated to the cells of the first zone, using the single frequency network message transmitted from the cells of the first zone, from the first cell and the second cell to the first zone. Transmitting resource allocation data to at least one mobile communication terminal; And Notifying a resource included in the M to a first mobile communication terminal included in the second cell via a non-single frequency network message, wherein the first mobile communication terminal is a resource included in the M; Receiving notification to receive information conveyed by the Resource allocation method. The method of claim 14, Notifying, via a non-single frequency network message, a second mobile communication terminal of the resources included in the N except for the resources included in the M; The resources are utilized for delivery of information other than the information delivered to the first mobile communication terminal, Resource allocation method. In the resource allocation method for allocating one or more resources to one or more cells, Determining a number of resources for each of the cells in the zone, wherein resource N is allocated to a first cell in a first geographic region of the first zone, and resource M is assigned to a second geographic region of the first zone. Assigned to a second cell in the region, M is a subset of N; Resource allocation data to at least one mobile communication terminal in the first zone using a single frequency network message transmitted from cells in the first zone to identify the resource N allocated to cells in the first zone. Transmitting a message; Notifying a first mobile communication terminal included in the second cell via a non-single frequency network message to the resources included in the N except the resources included in the M, wherein the first mobile communication terminal Includes being notified to receive information via resources included in the M, Resource allocation method. When the first cell and the second cell are included in the first zone, but are included in different geographical regions, the resources of set X are allocated to the first cell and the resources of set Y are allocated to the second cell. As a system to assign, The first using a single frequency network message transmitted from all cells of the first zone, identifying the union of the set X and the set Y as resources allocated to all cells of the first zone. A logic unit for transmitting resource allocation data to at least one mobile communication terminal in one zone, A first mobile communication terminal in the first cell receives a first non-single frequency network notification message and is notified that resources of the set X are designated for allocation to the first cell; A second mobile communication terminal in the second cell receives a second non-single frequency network notification message and is notified that the resources of the set Y are designated for allocation to the second cell, system. The method of claim 12, In both the first geographic region and the second geographic region of the first zone, the information conveyed by the allocated resources is the same, system. A system for allocating one or more resources to one or more cells, A logic unit for determining the number of resources for each of the cells of a zone, wherein resource N is allocated to a first cell in a first geographic region of a first zone, and resource M is a second of the first zone. Assigned to a second cell in a geographic area, M being a subset of N; Identify the resource N allocated to the cells of the first zone, using the single frequency network message transmitted from the cells of the first zone, from the first cell and the second cell to the first zone. A logic unit for transmitting resource allocation data to at least one mobile communication terminal, A logic unit for notifying resources contained in the M to a first mobile communication terminal included in the second cell via a non-single frequency network message, wherein the first mobile communication terminal is included in the M. Including being notified to receive information conveyed by the resources, system. The method of claim 19, A logic unit for notifying a second mobile communication terminal of the resources included in the N except the resources included in the M through a non-single frequency network message, The resources are utilized for delivery of information other than the information delivered to the first mobile communication terminal, system.

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