CN101047585A - Resource allocating method, customer group method and resource allocating system - Google Patents

Abstract

The present invention provides a resource assignment method, which uses a resource assignment module structure including the following assignment modules: a forward data packet format update module, which is used for transmission format update assignment in the forward single-input single-out antenna mode ;Forward single-codeword data packet format update module, used for transmission format update assignment in forward single-codeword multi-input multi-output antenna mode; Forward multi-codeword data packet format update module, used for forward multi-code transmission format update assignment under word multi-input multi-output antenna mode; and a reverse data packet format update module, which is used for transmission format update assignment under reverse single-input single-output antenna mode. Through the above technical solution, the present invention achieves the following beneficial effects: in the sticky mode of resource assignment, the transmission format of MAC PDU can be adaptively adjusted according to the change of the wireless channel, thus overcoming the increase of bit error rate and the utilization of wireless resources rate reduction problem.

Description

Resource assignment method, user grouping method and resource assignment system

technical field

The present invention relates to the field of communication, and more particularly, to a resource assignment method, user grouping method and resource assignment system, which can be applied to a communication system such as an OFDM (Orthogonal Frequency Division Multiplexing) system.

Background technique

OFDM (Orthogonal Frequency Division Multiplexing) technology is a physical layer technology adopted in IEEE802.20 (MBWA Mobile Broadband Wireless Access). OFDM technology divides the physical layer resources in the wireless communication system into several orthogonal narrowband sub-carriers in the frequency domain, and high-speed data streams are transmitted in parallel on each sub-carrier through serial-to-parallel conversion. Since the narrowband characteristics of subcarriers can overcome the influence of multipath, the interference between symbols is greatly eliminated; due to the orthogonal characteristics of subcarriers, that is, the characteristics of overlapping spectrums between subcarriers, the utilization rate of spectrum is improved. Therefore, the use of OFDM technology in wireless communication systems is gradually becoming the development trend of mobile communication systems.

The physical layer resources in the OFDM system can be regarded as a two-dimensional plane formed by the "time domain" and "frequency domain", where the available frequency resources are divided into N basic frequency transmission units, and a basic frequency transmission unit can be A subcarrier can also be a frequency subband composed of multiple subcarriers; at the same time, the physical layer resources in a transmission time period (OFDM frame) are composed of M basic time transmission units, and each basic transmission time unit includes a or multiple OFDM symbols.

The OFDM wireless communication system allocates the basic frequency transmission unit within a basic transmission time unit to each user data stream according to the scheduling process, and then notifies the mobile station receiving end of the scheduling result through the forward control channel.

In the wireless air interface, the protocols related to resource assignment mainly involve physical layer protocol and media access control (MAC) layer protocol. In order to support the resource assignment process, a forward common signaling control channel F-SSCH is designed on the AN (Access Network, access network) side to complete the resource assignment process. In particular, the resource allocation module in the F-SSCH is shown in FIG. 1 .

The MAC PDU (Protocol Data Unit) of each user equipment from the BSC (Base Station Service Controller) is first allocated to different queues for buffering by the buffer queue processing unit according to the MAC ID of the MAC PDU, and then waits for the AN to schedule on the F-DCH (forward data channel).

The AN (access network) schedules the data transmission in each MAC ID queue of each user equipment in each physical frame, that is, the AN selects a certain number of MAC PDUs in a queue according to a certain scheduling algorithm in the current physical frame. transmitted on the F-DCH channel. At the same time, the F-SSCH channel transmitted on the same physical frame is responsible for notifying the AT (AccessTerminal, access terminal) of information such as physical layer subcarrier resources and transmission formats used by each MAC PDU.

Referring to Fig. 1, it shows the format of the resource allocation module in the F-SSCH in the related art, can see, the resource allocation mode in the F-SSCH is divided into sticky mode (sticky) and non-sticky mode (non-sticky) sticky). Among them, the pasting mode means that the assigned resources and transmission format will not change from the successful assignment until the link is disconnected or re-assigned. The corresponding assignment modules include FLAB, MCWFLAB1, MCWFLAB2, SCWFLAB, and RLAB . Non-paste mode means that the current assignment is only valid for the currently transmitted data packet, and the assignment will automatically become invalid when the data packet is successfully demodulated or the HARQ retransmission process ends. The corresponding assignment modules include NS-FLAB, NS-MCWFLAB1, NS -MCWFLAB2, NS-SCWFLAB, and NS-RLAB. Different assigned modules are identified by the 4-bit Block Type (module type). At present, 11 types of modules are used, and 4 types are still reserved.

In related technologies, the transmission format allocated by the MAC PDU is obtained according to the CQI (Channel Quality Indication) reported by the AT. The available forward transmission formats are shown in Figure 2, and the reverse transmission formats are shown in Figure 3. The spectral efficiency of the first transmission, the maximum number of retransmissions, and the modulation order are defined. There are 16 transmission formats in total. , identified by a 4-bit PacketFormat Index (packet format/transmission format index).

Also as shown in FIG. 1 , in the resource assignment module of F-SSCH, subcarrier resource indication (ChID) and transmission format indication (PF) are bundled in the same module. In this way, under the assignment mode of sticky mode, the resource assignment corresponding to the MAC PDU does not change in a long period of time. Therefore, this method saves the assignment overhead of the forward control channel, but the transmission format of the MAC PDU ( PF) cannot be adaptively adjusted according to changes in the wireless channel, so that the bit error rate increases when the wireless channel environment becomes worse, or the utilization rate of wireless resources is reduced when the wireless channel environment becomes better.

Therefore, there is a need for a resource assignment method, which enables the transmission format (PF) of the MAC PDU to be adaptively adjusted according to changes in the wireless channel in the sticky mode, thereby overcoming the problems of increased bit error rate and decreased utilization of wireless resources .

Contents of the invention

The present invention has been made in consideration of the above-mentioned problems. The object of the present invention is to provide a resource assignment method and a user grouping method. By using the method, in the paste mode, the transmission format (PF) of the MAC PDU can be adaptively adjusted according to the change of the wireless channel, thereby reducing the frequency of wireless transmission. The bit error rate and improve the utilization of wireless resources.

According to one aspect of the present invention, a resource assignment method is provided, which uses a new resource assignment module structure, which includes four assignment modules, namely forward packet format update (FPF_UPDATE) module, forward Updating (FSCWPF_UPDATE) module to single codeword data packet format, forward multi-codeword data packet format updating (FMCWPF_UPDATE) module, and reverse data packet format updating (RPF_UPDATE) module.

In particular, the above four assignment modules respectively correspond to the four forward/reverse assignment modules in the pasting mode in the related art.

Specifically, the FPF_UPDATE module is used for the transmission format update assignment in the forward SISO (single input single output) antenna mode; the FSCWPF_UPDATE module is used for the transmission format in the forward SCW MIMO (single codeword multiple input multiple output) antenna mode Update assignment; FMCWPF_UPDATE module is used for transmission format update assignment in forward MCW MIMO (Multiple Codeword Multiple Input Multiple Output) antenna mode; and RPF_UPDATE module is used for transmission in reverse SISO (Single Input Single Output) antenna mode Format update assignment.

It is worth noting that the module type identification of the resource assignment module above still uses the module type of the corresponding resource assignment module, specifically, the module type of the FPF_UPDATE module and the module type of the forward link allocation module (FLAB) same; the FSCWPF_UPDATE module has the same module type as the single codeword forward link assignment module (SCWFLAB); the FMCWPF_UPDATE module has the same module type as the multi-codeword forward link assignment module (MCWFLAB); and the RPF_UPDATE module has The module type is the same as that of the Reverse Link Assignment Block (RLAB). For each module with the same module type as above, a format type of 1 bit is used to distinguish it within the module.

In addition, the lengths of the above four resource assignment modules are similar to the lengths of the resource assignment modules in the related art, and are generally less than or equal to the length of the resource assignment modules in the related art. In this way, the limited padding bits can Meet the requirement of equal length for all assigned modules.

By using the resource assignment method according to the present invention, in the case of assigning resources in paste mode, after the first successful assignment of the MAC ID is completed on the access network side, if the trigger condition for updating the transmission format is satisfied, then The transmission format update of the corresponding data transmission link is completed in the F-SSCH through the above assignment module.

The above trigger conditions may include but not limited to the following situations:

1. The trigger condition is a predetermined period, that is, when the predetermined period passes, the transmission format is updated;

2. The trigger condition is the difference between CQI (channel quality indication) values, that is, when the difference between the CQI values fed back by the access terminal side to the access network side for two consecutive times is within a predetermined range, the transmission format is updated;

3. The trigger condition is the number of consecutive correct responses or incorrect responses, that is, when the number of consecutive correct responses or incorrect responses reaches a predetermined number, the transmission format is updated.

However, there may be a problem of increasing system overhead when the transmission format is updated according to the trigger condition in the case of assigning resources in the pasting mode.

Therefore, according to another aspect of the present invention, a user grouping method is provided, which divides users in the network into multiple groups according to the channel quality indicator value, and uses a group ID to identify each group. Wherein, the number of groups is equal to the number of data packet transmission format classifications.

In particular, the resource assignment method according to the present invention can allocate resources by grouping users. By means of the resource assignment method and user grouping method according to the present invention, for PF_UPDATE under single-input-single-out and single-codeword multiple-input-multiple-output modes, the information of two groups of users identified by Group ID1 and Group ID2 can be updated at the same time each time. Transmission format configuration.

According to yet another aspect of the present invention, a resource allocation system is provided, including:

The forward data packet format update (FPF_UPDATE) module is used for the transmission format update assignment in the forward SISO (single input single output) antenna mode, and its module type is the same as that of the forward link distribution module (FLAB);

Forward single codeword data packet format update (FSCWPF_UPDATE) module, used for transmission format update assignment in forward SCW MIMO (single codeword multiple input multiple output) antenna mode, its module type is the same as single codeword forward link allocation modules (SCWFLAB) of the same module type;

Forward multi-codeword data packet format update (FMCWPF_UPDATE) module, used for transmission format update assignment in forward MCW MIMO (multi-codeword multiple-input multiple-output) antenna mode, its module type is related to multi-codeword forward link allocation modules (MCWFLAB) of the same module type, and

The reverse packet format update (RPF_UPDATE) module is used for transmission format update assignment in the reverse SISO (single-input-single-out) antenna mode, and its module type is the same as that of the reverse link allocation module (RLAB).

Through the above technical solutions, the present invention achieves the following beneficial effects: in the paste mode, the transmission format (PF) of the media access control PDU (data protocol unit) can be adaptively adjusted according to the change of the wireless channel, thereby overcoming the error The problem of code rate increase and wireless resource utilization decrease.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention, and constitute a part of the application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, and do not constitute improper limitations to the present invention. In the attached picture:

FIG. 1 is a table showing an F-SSCH block structure according to the related art;

FIG. 2 is a table showing a forward transmission format according to the related art;

FIG. 3 is a table showing a reverse transmission format according to the related art;

Figure 4 is a table showing the F-SSCH block structure according to the present invention; and

Fig. 5 is a block diagram showing the structure of a resource assignment system according to a third embodiment of the present invention.

Detailed ways

Embodiments of the present invention will be described below with reference to the accompanying drawings.

first embodiment

As shown in Figure 4, the resource assignment method according to the first embodiment of the present invention uses a new resource assignment module structure, which includes four assignment modules, namely FPF_UPDATE module, FSCWPF_UPDATE module, FMCWPF_UPDATE module, and RPF_UPDATE modules, the above four assignment modules respectively correspond to the four forward/reverse assignment modules in the pasting mode in the related art.

The FPF_UPDATE module is used for the transmission format update assignment in the forward SISO (single input single output) antenna mode, and is identified by the Block Type (module type) "0101" of the FLAB module; the FSCWPF_UPDATE module is used for the forward SCW MIMO (single codeword The transmission format update assignment under the multiple-input multiple-output) antenna mode is identified by the BlockType "1000" of the SCWFLAB module; the FMCWPF_UPDATE module is used for the transmission format update specification under the forward MCW MIMO (multiple codeword multiple input multiple output) antenna mode For configuration, use the Block Type "0110" of the MCWFLAB1 module to identify; and the RPF_UPDATE module is used for the transmission format update assignment in the reverse SISO (single-input-single-out) antenna mode, and use the Block Type "1001" of the RLAB module to identify.

In particular, as shown in Figure 4, the lengths of the above four resource assignment modules are similar to those in the related art. Specifically, the lengths of the FPF_UPDATE module and the RPF_UPDATE module are 21 bits, and the length of the FSCWPF_UPDATE module is 21 bits. is 19 bits, and the length of the FMCWPF_UPDATE module is 10+4*( _{NEFF_TX_ANT-1} ), where _{NEFF_TX_ANT-1} is the number of effective antennas in the system, so that all assigned modules can be of equal length through limited padding bits requirements.

Continuing to refer to Figure 4, the Block Type identifiers of the above resource allocation modules still use the Block Type of their corresponding resource allocation modules respectively, and the 1-bit Format Type is used to distinguish them within the modules.

By using the resource assignment method according to the present invention, in the case of assigning resources in paste mode, after the first successful assignment of the MAC ID is completed on the AN side, if the trigger condition of the transmission format update is met, then through the above The assignment module of the F-SSCH completes the update of the transmission format of the corresponding data transmission link.

The above trigger conditions may include but not limited to the following situations:

1. The trigger condition is a predetermined period, that is, when the predetermined period passes, the transmission format is updated;

2. The trigger condition is the difference between CQI (channel quality indication) values, that is, when the difference between the CQI values fed back by the access terminal side to the access network side for two consecutive times is within a predetermined range, the transmission format is updated;

3. The trigger condition is the number of consecutive correct responses or incorrect responses, that is, when the number of consecutive correct responses or incorrect responses reaches a predetermined number, the transmission format is updated.

second embodiment

In the case of assigning resources in paste mode, the transmission format is updated according to trigger conditions, which may increase system overhead. Therefore, according to the second embodiment of the present invention, a user grouping method is provided, which divides the users in the network into multiple groups according to the channel quality indicator value, and uses a group ID to identify each group.

Wherein, the quantity of dividing into groups is equal to the quantity of data packet transmission format classification, as shown in Figure 2, has adopted 16 kinds of transmission formats in the related art, therefore, according to the user grouping method of the embodiment of the present invention divide the user in the network according to the CQI value Divided into 16 groups, identified by a 4-bit Group ID.

In particular, the resource assignment method according to the first embodiment of the present invention can use this user grouping method. For example, for PF_UPDATE in single-input single-out and single-codeword multiple-input multiple-output modes, the Group can be updated at the same time each time Transmission format configuration of two groups of users identified by ID1 and Group ID2. And when the AT side receives the resource assignment module and the resource assignment update module with the same Block Type at the same time, ignore the resource assignment update module.

third embodiment

A third embodiment according to the present invention will be described below with reference to FIG. 5, wherein FIG. 5 is a block diagram showing the structure of a resource assignment system according to the third embodiment of the present invention.

The resource allocation system 500 according to the present invention includes:

Forward packet format update (FPF_UPDATE) module 502, used for forward SISO (single-in-single-out) antenna mode transmission format update assignment, its module type is the same as that of the forward link allocation module (FLAB);

Forward single-codeword packet format update (FSCWPF_UPDATE) module 504, used for transmission format update assignment under forward SCW MIMO (single-codeword multiple-input multiple-output) antenna mode, its module type is the same as single-codeword forward link The module type of the allocation module (SCWFLAB) is the same;

Forward multi-codeword data packet format update (FMCWPF_UPDATE) module 506, used for transmission format update assignment under forward MCW MIMO (multiple codeword multiple input multiple output) antenna mode, its module type and multi-codeword forward link The module type of the allocation module (MCWFLAB) is the same, and

The reverse packet format update (RPF_UPDATE) module 508 is used for transmission format update assignment in the reverse SISO (single-input-single-out) antenna mode, and its module type is the same as that of the reverse link allocation module (RLAB).

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (18)

1. A resource assignment method, characterized in that, using a resource assignment module structure comprising the following assignment modules: The forward data packet format update module is used for the transmission format update assignment in the forward single-input single-out antenna mode; The forward single codeword data packet format update module is used for the transmission format update assignment under the forward single codeword multiple-input multiple-output antenna mode; Forward multi-codeword data packet format update module, used for transmission format update assignment in forward multi-codeword multi-input multi-output antenna mode; and The reverse data packet format update module is used for the transmission format update assignment in the reverse single-input single-out antenna mode. 2. The resource assignment method according to claim 1, characterized in that, The module type of the forward data packet format update module is the same as the module type of the forward link distribution module; The module type of the forward single code word packet format update module is the same as the module type of the single code word forward link distribution module; The module type of the forward multi-codeword packet format update module is the same as the module type of the multi-codeword forward link assignment module; and The module type of the reverse data packet format update module is the same as that of the reverse link distribution module. 3. The resource assignment method according to claim 1, wherein each of the assignment modules includes a format type of one bit, and the format type is used to distinguish the assignment module from the other Modules of the same module type. 4. The resource assignment method according to claim 1, characterized in that, The length of the forward data packet format update module is less than or equal to the length of the forward link assignment module; The length of the forward single-codeword packet format update module is less than or equal to the length of the single-codeword forward link allocation module; The length of the forward multi-codeword packet format update module is less than or equal to the length of the multi-codeword forward link assignment module; and The length of the reverse data packet format update module is less than or equal to the length of the reverse link allocation module. 5. The resource assignment method according to claim 1, characterized in that, in the case of assigning resources in sticky mode, after the access network side completes the first successful assignment of the media access control ID, If the triggering condition for updating the transmission format is satisfied, the updating of the transmission format is completed through the assigning module. 6. The resource assignment method according to claim 5, wherein the trigger condition is a predetermined period, and when the predetermined period passes, the transmission format is updated. 7. The resource assignment method according to claim 5, wherein the trigger condition is the difference between the channel quality indicator value, when the channel quality indicator value fed back by the access terminal side to the access network side for two consecutive times When the difference between is within a predetermined range, the transmission format is updated. 8. The resource assignment method according to claim 5, wherein the trigger condition is the number of consecutive correct responses or incorrect responses, and when the number of consecutive correct responses or incorrect responses reaches a predetermined number, the transmission format is updated. 9. The resource assignment method according to claim 1, characterized in that the resource assignment is completed in a manner of grouping users. 10. The resource assignment method according to claim 9, wherein the users in the network are divided into multiple groups according to the channel quality indicator value, and each group is identified with a group ID. 11. The resource assignment method according to claim 9, characterized in that the number of groups is equal to the number of data packet transmission format classifications. 12. The resource allocation method according to claim 9, wherein the assignment module performs transmission format update according to the packet. 13. A user grouping method, characterized in that the users in the network are divided into multiple groups according to the channel quality indicator value, and each group is identified with a group ID. 14. The user grouping method according to claim 13, wherein the number of said groups is equal to the number of data packet transmission format classifications. 15. A resource assignment system, characterized in that it comprises: The forward data packet format update module is used for the transmission format update assignment in the forward single-input single-out antenna mode; The forward single codeword data packet format update module is used for the transmission format update assignment under the forward single codeword multiple-input multiple-output antenna mode; Forward multi-codeword data packet format update module, used for transmission format update assignment in forward multi-codeword multi-input multi-output antenna mode; and The reverse data packet format update module is used for the transmission format update assignment in the reverse single-input single-out antenna mode. 16. The resource assignment system according to claim 15, characterized in that, The module type of the forward data packet format update module is the same as the module type of the forward link distribution module; The module type of the forward single code word packet format update module is the same as the module type of the single code word forward link assignment module; The module type of the forward multi-codeword packet format update module is the same as the module type of the multi-codeword forward link assignment module; and The module type of the reverse data packet format update module is the same as that of the reverse link distribution module. 17. The resource assignment system according to claim 15, wherein each of the assignment modules includes a one-bit format type, and the format type is used to distinguish the assignment module from the other Modules of the same module type. 18. The resource assignment system according to claim 15, characterized in that, The length of the forward data packet format update module is less than or equal to the length of the forward link assignment module; The length of the forward single-codeword packet format update module is less than or equal to the length of the single-codeword forward link allocation module; The length of the forward multi-codeword packet format update module is less than or equal to the length of the multi-codeword forward link assignment module; and The length of the reverse data packet format update module is less than or equal to the length of the reverse link allocation module.

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